CN101945399B - Distributed base station - Google Patents
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- CN101945399B CN101945399B CN 201010275193 CN201010275193A CN101945399B CN 101945399 B CN101945399 B CN 101945399B CN 201010275193 CN201010275193 CN 201010275193 CN 201010275193 A CN201010275193 A CN 201010275193A CN 101945399 B CN101945399 B CN 101945399B
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Abstract
The invention relates to a base station technique and provides a distributed base station. The distributed base station comprises a near-end part and a far-end part, wherein the near-end part comprises a first interface unit, a downlink baseband processing unit, a resource distributing unit, a clock unit and a central control unit; the far-end part comprises a second interface unit, an uplink baseband processing unit and a radio frequency processing unit; the near-end part is connected with the far-end part through optical fibers. On one hand, the distributed base station solves the problem of background noise lifting in the conventional network under the condition of maintaining the advantages of the traditional distributed base station so as to increase the far-end cascade number; and on the other hand, the distributed base station has the advantages of reducing the consumption of line circuit resources, not greatly increasing networking cost, reducing the complexity of the design of the far-end part and realizing the balance between the properties and the cost.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of distributed base station.
Background technology
In radio honeycomb communication system, the base station is the important component part of whole system, and its function mainly communicates by other network elements such as terrestrial interface and base station controllers, and communicates with user terminal by eating dishes without rice or wine.
In traditional base station, indoor section is connected by cable with outdoor section.Because the loss ratio of cable is bigger, causes the waste of resource easily; And traditional base station is huge and heavy usually, and addressing and installation are all complicated.
In order to address the above problem, industry has proposed the distributed base station design method of BBU+RRU, gradually becomes main flow at present.Distributed base station is made up of Base Band Unit (BBU) and remote radio unit (RRU) (RRU) usually, and BBU can be called as indoor unit again, and RRU can be called as outdoor unit again; Wherein, BBU mainly is responsible for the processing of transport layer and baseband portion, and RRU then mainly is responsible for the processing of radio frequency part, and a BBU can support one or more RRU, connects with optical fiber between the two.
A kind of traditional distributed base station is provided in the prior art, and with reference to the structure chart of figure 1, this base station comprises indoor unit 110 and outdoor unit 120; Indoor unit 110 comprises transport layer process unit 111, physical layer processing unit 112 and first interface unit 113, and outdoor unit 120 comprises second interface unit 121 and RF processing unit 122.
In research and practice process to above-mentioned prior art, found shortcoming one is: the Base-Band Processing function setting is at indoor unit, occur the end lifting problem of making an uproar when holding cascade how far easily, the receiving sensitivity of base station is low, has greatly limited the cascade number of distal portions.
The found shortcoming two of above-mentioned prior art is: first interface unit is through code modulated digital signal to the down user data that second interface unit sends in this invention, owing to compare with the un-encoded modulated digital signal, data volume through code modulated digital signal is much bigger, therefore it is excessive that there is the data traffic between the interface unit of indoor unit and outdoor unit in above-mentioned prior art, thereby cause line resource by too much expending.
At shortcoming two, patent No. CN200710130360.3 has provided a kind of improved method that reduces the line resource waste, as shown in Figure 2.
Distributed base station is divided into indoor unit and outdoor unit, the physical layer process function of traditional distributed base station is all transferred in the outdoor unit (RRU) carries out, this makes that what transmit between the indoor and outdoor unit is the signal of un-encoded modulation, by this method, effectively reduce the waste of line resource, also reduced the requirement to transmission rate simultaneously.
The method for designing of patent CN200710130360.3 still has its significant disadvantage.Consider from networking standpoint, BBU drag a plurality of RRU namely an indoor unit to connect a plurality of outdoor units are the most common modes.The implementation of described patent is carried out because physical layer processing unit is all transferred to RRU, and the cost that this has in fact significantly improved RRU makes whole networking cost significantly improve, and this is a significant deficiency when carrying out the far-end cascade.
Summary of the invention
Purpose of the present invention is exactly all weak points that will overcome above-mentioned technology, proposes a kind of distributed base station.When the advantage that keeps the traditional distributed base station is constant, solve make an uproar lifting problem and reduce expending of line resource of the end, increased the cascade number and can not cause the significantly increase of networking cost.
A kind of distributed base station comprises proximal part and distal portions;
The a plurality of described distal portions of described proximal part serially concatenated, described a plurality of distal portions are positioned at same residential quarter or are positioned at a plurality of residential quarters;
Described proximal part comprises:
First interface unit is used for reception from the downstream signal of another network element and exports the downgoing baseband processing unit to; Also be used for reception from the upward signal of resource Dispatching Unit and export other network element to;
The downgoing baseband processing unit is used for the downstream signal from first interface unit is carried out exporting the resource Dispatching Unit to after the Base-Band Processing;
The resource Dispatching Unit is used for receiving the downstream signal from the downgoing baseband processing unit, is distributed to one or more distal portions; Also be used for to receive the upward signal from one or more distal portions, gather and export first interface unit to;
Clock unit is used for providing clock signal to each unit of proximal part;
Middle control unit is used for each unit of proximal part is carried out centralized control;
Described distal portions comprises:
Second interface unit is used for reception from the downstream signal of proximal part resource Dispatching Unit and exports RF processing unit to; Also be used for to receive from the upward signal of uplink baseband processing unit and export the resource Dispatching Unit of proximal part to;
The uplink baseband processing unit is used for the upward signal from RF processing unit is carried out exporting second interface unit to after the Base-Band Processing;
RF processing unit is used for receiving from the upward signal of eating dishes without rice or wine, and carries out being sent to the uplink baseband processing unit after the radio frequency processing; Also be used for receiving the downstream signal from second interface unit, carry out exporting after the radio frequency processing.
Described distributed base station proximal part is connected with optical fiber with distal portions.
Described distributed base station is compared with the traditional distributed base station, because the uplink baseband processing has been placed on distal portions, demodulating and decoding all carries out at distal portions, the up end when the having solved a plurality of distal portions cascade lifting problem of making an uproar, the receiving sensitivity of base station is greatly improved, and has increased the cascade number of distal portions; Simultaneously because the signal that remains un-encoded that transmits between the nearly far-end has also relaxed the constraint to fiber-optic transmission rate.
Described distributed base station is compared with the distributed base station that baseband processing unit all is placed on far-end, has considered the necessity of practical engineering application.To transfer to distal portions to the ascender Base-Band Processing function that network performance has the greatest impact and carry out, but keep descending baseband processing unit in proximal part.This way had both solved make an uproar outstanding problem in this existing network of lifting of the up end, had reduced the complexity on the distal portions modular design again, had realized the equilibrium of performance and cost.
Description of drawings
Fig. 1 is traditional distributed architecture of base station schematic diagram.
Fig. 2 is patent CN200710130360.3 distributed base station structural representation.
Fig. 3 is distributed base station structural representation of the present invention.
Fig. 4 is the schematic diagram of a kind of execution mode of the present invention when the far-end cascade.
Fig. 5 is the schematic diagram of the another kind of execution mode of the present invention when the far-end cascade.
Embodiment
Below in conjunction with accompanying drawing, several embodiment of distributed base station of the present invention are described in detail.
Embodiment one:
Referring to Fig. 3, it is the structural representation of distributed base station of the present invention.
As shown in Figure 3, described distributed base station comprises proximal part and distal portions; Proximal part comprises first interface unit 311, downgoing baseband processing unit 312, resource Dispatching Unit 313, clock unit 314 and middle control unit 315; Distal portions comprises second interface unit 321, uplink baseband processing unit 322 and RF processing unit 323.
In the described proximal part:
First interface unit 311 receives from the downstream signal of another network element and exports downgoing baseband processing unit 312 to; And receive from the upward signal of resource Dispatching Unit 313 and export other network element to;
312 pairs of downstream signals from first interface unit 311 of downgoing baseband processing unit carry out exporting resource Dispatching Unit 313 to after the Base-Band Processing;
The downstream signal that resource Dispatching Unit 313 receives from downgoing baseband processing unit 312 is distributed to one or more distal portions; And receive upward signal from one or more distal portions, gather and export first interface unit 311 to;
Clock unit 314 provides clock signal to each unit of proximal part;
Middle control unit 315 carries out centralized control to each unit of proximal part;
In the described distal portions:
Second interface unit 321 receives from the downstream signal of proximal part resource Dispatching Unit 313 and exports RF processing unit 323 to; And receive from the upward signal of uplink baseband processing unit 322 and export resource Dispatching Unit 313 to;
322 pairs of upward signals from RF processing unit 323 of uplink baseband processing unit carry out exporting second interface unit 321 to after the Base-Band Processing;
RF processing unit 323 receives from the upward signal of eating dishes without rice or wine, and carries out being sent to uplink baseband processing unit 322 after the radio frequency processing; And reception is carried out exporting after the radio frequency processing from the downstream signal of second interface unit 321.
As an embodiment preferably, in described distributed base station, proximal part can be connected with optical fiber with distal portions, but does not get rid of the possibility of other the better transmission medium that occurs after can using.
Described distributed base station, the transfer of data between near-end branch and the distal portions can be followed the CPRI agreement, can also follow other standard agreements or custom protocol.
Embodiment two:
Referring to Fig. 4, be a kind of embodiment of distributed base station when the far-end cascade.
In the present embodiment, a plurality of distal portions of proximal part serially concatenated.Distal portions 1 directly links to each other by optical fiber with proximal part, and distal portions 2 links to each other with proximal part via distal portions 1, and distal portions 3 links to each other with proximal part via distal portions 1,2, and the like.
Described far-end cascade system, distal portions 1 all are configured to same residential quarter to distal portions N.
Described far-end cascade system can connect with optical fiber between the distal portions, also can connect with netting twine, can also use other media to connect.
In this embodiment, because all distal portions is set to same residential quarter, so the signal switching can not take place in all distal portions overlay areas, under the operating environment of high-speed railway, this has great improvement to network performance.Similarly wide covering, low capacity applied environment all can adopt this with the cell configuration scheme.
Embodiment three:
Referring to Fig. 5, be the another kind of embodiment of distributed base station when the far-end cascade.
In the present embodiment, the difference with scheme in above-described embodiment two is that distal portions all is not configured to same residential quarter.
Described far-end cascade system, when capacity requirement was not high, all distal portions was configured to same residential quarter, is execution mode shown in Figure 4; When capacity requirement was higher, distal portions was configured to a plurality of residential quarters.
In described many cell configuration mode, both can only dispose a distal portions in a residential quarter, also can a plurality of distal portions of cell configuration, specifically how to use this cross-over configuration method situation according to the engineering place of should following to decide.
Described far-end cascade system, when capacity requirement promoted, proximal part need carry out the upgrading of disposal ability simultaneously.
The advantage of this application mode is to need not to carry out engineered when dilatation, only need revise the configuration of distal portions, and proximal part is carried out the appropriateness upgrading gets final product.This application mode is few to the change of existing network, is particularly suitable for the high places of strong, the engineered difficulty of dilatation demand such as skyscraper, residential quarters.
Above-described embodiment of the present invention does not constitute the restriction to protection range of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (4)
1. a distributed base station comprises proximal part and distal portions, it is characterized in that:
The a plurality of described distal portions of described proximal part serially concatenated, described a plurality of distal portions are positioned at same residential quarter or are positioned at a plurality of residential quarters;
Described proximal part comprises:
First interface unit is used for reception from the downstream signal of another network element and exports the downgoing baseband processing unit to; And receive from the upward signal of resource Dispatching Unit and export other network element to;
The downgoing baseband processing unit is used for the downstream signal from described first interface unit is carried out exporting the resource Dispatching Unit to after the Base-Band Processing;
The resource Dispatching Unit is used for receiving the downstream signal from described downgoing baseband processing unit, is distributed to one or more distal portions; And receive upward signal from one or more distal portions, gather and export described first interface unit to;
Clock unit is used for providing clock signal to each unit of described proximal part;
Middle control unit is used for each unit of described proximal part is carried out centralized control;
Described distal portions comprises:
Second interface unit is used for reception from the downstream signal of described proximal part resource Dispatching Unit and exports RF processing unit to; And receive from the upward signal of uplink baseband processing unit and export the resource Dispatching Unit of described proximal part to;
The uplink baseband processing unit is used for the upward signal from RF processing unit is carried out exporting described second interface unit to after the Base-Band Processing;
RF processing unit is used for receiving from the upward signal of eating dishes without rice or wine, and carries out being sent to described uplink baseband processing unit after the radio frequency processing; And reception is carried out exporting after the radio frequency processing from the downstream signal of described second interface unit.
2. distributed base station according to claim 1 is characterized in that: be connected with optical fiber between described proximal part and the described distal portions.
3. distributed base station according to claim 2, it is characterized in that: the transfer of data between described proximal part and the described distal portions is followed the CPRI agreement.
4. distributed base station according to claim 3 is characterized in that: connect with optical fiber between the described distal portions, perhaps connect with netting twine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010275193 CN101945399B (en) | 2010-09-03 | 2010-09-03 | Distributed base station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010275193 CN101945399B (en) | 2010-09-03 | 2010-09-03 | Distributed base station |
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| CN101945399A CN101945399A (en) | 2011-01-12 |
| CN101945399B true CN101945399B (en) | 2013-07-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9380466B2 (en) | 2013-02-07 | 2016-06-28 | Commscope Technologies Llc | Radio access networks |
| US9414399B2 (en) | 2013-02-07 | 2016-08-09 | Commscope Technologies Llc | Radio access networks |
| US9936470B2 (en) | 2013-02-07 | 2018-04-03 | Commscope Technologies Llc | Radio access networks |
| CA3167284A1 (en) | 2014-06-09 | 2015-12-17 | Airvana Lp | Radio access networks |
| CN106686763B (en) * | 2016-12-01 | 2020-06-09 | 邦讯技术股份有限公司 | LTE base station system and cell merging and splitting method |
| EP3692735B1 (en) | 2017-10-03 | 2022-08-03 | Commscope Technologies LLC | Dynamic downlink reuse in a c-ran |
| CN112235058B (en) * | 2020-10-12 | 2022-08-19 | 江苏亨鑫众联通信技术有限公司 | Standing-wave ratio detection system and method and radio remote unit with system |
| CN112235284A (en) * | 2020-10-12 | 2021-01-15 | 江苏亨鑫众联通信技术有限公司 | Expandable pico-base station system and uplink and downlink data transmission method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106766A (en) * | 2007-07-18 | 2008-01-16 | 华为技术有限公司 | Indoor unit and outdoor unit for distributed base station and distributed base station |
| CN201118871Y (en) * | 2007-11-06 | 2008-09-17 | 京信通信系统（中国）有限公司 | A GSM digital optical cable optical terminal with multi-carrier frequency selection function |
| CN101394197A (en) * | 2008-09-28 | 2009-03-25 | 中兴通讯股份有限公司 | Baseband data transmission method and device for CDMA distributed base station system |
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- 2010-09-03 CN CN 201010275193 patent/CN101945399B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106766A (en) * | 2007-07-18 | 2008-01-16 | 华为技术有限公司 | Indoor unit and outdoor unit for distributed base station and distributed base station |
| CN201118871Y (en) * | 2007-11-06 | 2008-09-17 | 京信通信系统（中国）有限公司 | A GSM digital optical cable optical terminal with multi-carrier frequency selection function |
| CN101394197A (en) * | 2008-09-28 | 2009-03-25 | 中兴通讯股份有限公司 | Baseband data transmission method and device for CDMA distributed base station system |
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Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee before: Comba Telecom System (China) Ltd. |
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