CN105656589A - Self-adaption method for 6.5G/10G optical fiber speed in DAS system - Google Patents
Self-adaption method for 6.5G/10G optical fiber speed in DAS system Download PDFInfo
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- CN105656589A CN105656589A CN201511018844.XA CN201511018844A CN105656589A CN 105656589 A CN105656589 A CN 105656589A CN 201511018844 A CN201511018844 A CN 201511018844A CN 105656589 A CN105656589 A CN 105656589A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
- H04W16/20—Network planning tools for indoor coverage or short range network deployment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
- H04W88/181—Transcoding devices; Rate adaptation devices
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Abstract
The invention provides a self-adaption method for 6.5G/10G optical fiber speed in a DAS system. The method comprises the following steps of 1, the ARM on an AU reconfigures an FPGA program and a clock module according to that whether the optical module butt-jointed with a lower level device is in place and whether the sum of speeds of the optical modules can be synchronous with the lower level device (EU/RU); 2, the ARM on the EU reconfigures the FPGA program and the clock module according to that whether the optical module butt-jointed with an upper level device is in place and whether the sum of speeds of the optical modules can be synchronous with the upper level device (AU/EU), and further partially reconfigures according to that whether the optical module butt-jointed with the lower level device (EU/RU) is in place and whether the sum of speeds of the optical modules can be synchronous with the lower level device (EU/RU); and 3, the ARM on the RU reconfigures the FPGA program and the clock module according to that whether the optical module butt-jointed with the upper level device is in place and whether the sum of speeds of the optical modules can be synchronous with the upper level device (AU/EU). The self-adaption method has the advantages that the self-adaption of the 6.5G/10G optical fiber speed can be achieved and the downward compatibility to the old devices are achieved by using the optical module recognition capability of the ARM and the on-line programmable and reconfigurable capability of the FPGA in the device, and the self-adaption method also can be used for reducing the system transmission cost.
Description
Technical field
The present invention relates to moving communicating field, a kind of self-adaptation method being specifically related in DAS system 6.5G/10G optical fiber speed.
Background technology
Indoor distributed system utilizes indoor antenna system of distribution that the signal of mobile base station is evenly distributed on indoor every nook and cranny, thus ensures that room area has desirable quorum sensing inhibitor. Building stands in great numbers, densely populated central business region, in order to solve, the covering of interior of building wireless signal is not enough accesses the problems such as number with lifting user, the construction of indoor distributed system has become wireless signal and has covered the main technique means supplemented with share user's telephone traffic, and is widely used.
DAS system is that operator provides an in-door covering solution more more efficiently than indoor base station small-sized, distributed (slight RBS). It can increase without the relaying quantity on line interface and transmission link, and therefore, each wireless links between floors any one can be used all at any time. The coverage that DAS solution is also convenient in operator's control and restriction buildings, to reduce the mutual interference with macrocellular network, thus increases the total volume of network.
In the 3G epoch, optical fiber indoor distributed system is with regard to progressively occuping market, and the maximum feature of Optical Fiber Transmission is that transmission loss is little, is transport vehicle best in current all transmission mediums. All-fiber in-door covering accesses, by cell, the indoor wireless networks optimization system that unit, optical cable, expanding element and antenna form jointly. DAS system is also the mode adopting Optical Fiber Transmission. Along with the arrival in 4G epoch, indoor distributed system needs to carry out replacing, upgrading, it is desirable to can carry out upgrading upgrading on original indoor distribution equipment, the least possible replace it before equipment, reduce the upgrade cost of operator.
Summary of the invention
It is an object of the invention to overcome deficiency of the prior art, and the self-adaptation method of 6.5G/10G optical fiber speed in a kind of DAS system be provided, it is achieved to the backward compatible of old equipment and under specific circumstances reduce optical fiber speed, reduce optical module cost.
It is an object of the invention to be achieved through the following technical solutions. The self-adaptation method of 6.5G/10G optical fiber speed in this kind of DAS system, has AU, EU and RU respectively in DAS system, base station signal, as access unit, is converted to numerary signal, passes through Optical Fiber Transmission by AU; EU as expanding element, for optical fiber relaying and expansion; RU is as far-end unit, and external antenna, for various indoor scene; The method step is as follows:
1), the upper ARM of AU in place according to docking optical module with subordinate equipment, optical module speed and can synchronous with next stage equipment (EU/RU) FPGA program and clock module being reconfigured;
2), the upper ARM of EU in place according to the optical module docked with higher level equipment, optical module speed and can synchronous with higher level equipment (AU/EU) clock module and FPGA program being reconfigured; In place according to the optical module docked with subordinate equipment (EU/RU) again, optical module speed is partly reshuffled with can synchronous with subordinate equipment be carried out by FPGA;
3), the upper ARM of RU in place according to the optical module docked with higher level equipment, optical module speed and can synchronous with higher level equipment (EU/RU) clock module and FPGA program being reconfigured.
Further, the clock of AU, as major clock, provides reference clock to be used for Optical Fiber Transmission to the FPGA on AU; Clock module on EU and RU is from clock, and the FPGA on EU/RU can recover reference clock by optical fiber, as the reference source of clock module, it is achieved the clock source between AU, EU and RU tri-unit is same.
Further, AU adapts to according to the speed of subordinate's optical module as the access unit of DAS system, self-adaptation 6.5G/10G optical fiber speed, and the step of AU self-adaptation 6.5G/10G optical fiber speed is as follows:
A. after device start, first go detection light module in place by ARM, just wait not in place, if the speed just going detection light module in place;
If b. optical module speed is 10G, just start normal operation; If optical module speed is 6.5G, just must reconfigure the version of FPGA and the parameter of clock module, then start normal operation; After normal operation, in addition it is also necessary to continue detection light module in place, not in place, just return to wait; If in place, just continue normal operation.
Further, the step of EU/RU self-adaptation 6.5G/10G optical fiber speed is as follows:
First a.EU/RU detects the optical module docked with higher level after starting in place, if not in place, so impossible normal operation, just must wait;
B. after the optical module docked with higher level is in place, then the speed of this optical module is detected, if 10G, just directly start to detect the optical module docked with subordinate; If what dock with higher level is 6.5G optical module, it is necessary to reconfigure FPGA version and the parameter of clock module, then start to detect the optical module docked with subordinate;
If the optical module c. docked with subordinate is not in place, just continue to wait; If the optical module docked with subordinate is in place, just start to detect the speed of this optical module; If the speed of this optical module is 10G, just starting normal operation, initialize completes; If the speed of this optical module is 6.5G, it is necessary to startup part reshuffles the function of FPGA, is reshuffled by FPGA, and then start normal;
D. after starting normal operation, it is necessary to it is in place that first detection docks optical module with higher level, it is ensured that system still returns correct state after going wrong; If it is not in place, it is necessary to return a; If in place, just continue the state that optical module is docked in detection with subordinate;
If e. dock optical module with subordinate not in place, just return state c; If in place, whole system be described all still in the state of normal operation, return normal operation.
The effect that the present invention is useful: the present invention be applicable to one by being distributed in certain buildings, be specifically designed to network and distributing antenna system (DAS:DistributedAntennaSystem) that the multiple antennas providing wireless indoor to cover form. Utilize ARM in equipment that optical module being identified, the online programmable with FPGA, reconfigurable ability realize the self-adaptation to 6.5G/10G optical fiber speed, it is achieved backward compatible to used equipment, it is possible to for reducing system transfers cost.
Accompanying drawing explanation
Fig. 1 is the networking mode figure of AU, EU, RU in DAS system of the present invention;
Fig. 2 is the interconnected and mutual relationship figure of ARM, FPGA and clock module in AU, EU, RU of the present invention;
Fig. 3 is the schema of AU self-adaptation 6.5G/10G optical fiber speed of the present invention;
Fig. 4 is the schema of EU/RU self-adaptation 6.5G/10G optical fiber speed of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
Fig. 1 is the networking mode figure of AU, EU, RU in DAS system of the present invention, has AU (AccessUnit), EU (ExpansionUnit) and RU (RemoteUnit) in DAS system respectively. AU as access unit, descending base station is by coupling apparatus and base station communication, it is possible under meet EU and RU; EU, as expanding element, is communicated by optical fiber with AU/RU, and EU is with can cascade mutually between EU, it is also possible under meet RU; RU is as far-end unit, and external antenna, for various in-door covering, it is possible to meet EU, it is also possible to meet AU.
The method step is as follows:
1), the upper ARM of AU in place according to docking optical module with subordinate equipment, optical module speed and can synchronous with next stage equipment (EU/RU) FPGA program and clock module being reconfigured;
2), the upper ARM of EU in place according to the optical module docked with higher level equipment, optical module speed and can synchronous with higher level equipment (AU/EU) clock module and FPGA program being reconfigured; In place according to the optical module docked with subordinate equipment (EU/RU) again, optical module speed is partly reshuffled with can synchronous with subordinate equipment be carried out by FPGA;
3), the upper ARM of RU in place according to the optical module docked with higher level equipment, optical module speed and can synchronous with higher level equipment (EU/RU) clock module and FPGA program being reconfigured.
Fig. 2 is the interconnected and mutual relationship figure of ARM, FPGA and clock module in AU, EU, RU of the present invention. The clock of AU, as major clock, provides reference clock to be used for Optical Fiber Transmission to the FPGA on AU; Clock module on EU and RU is from clock, and the FPGA on EU/RU can recover reference clock by optical fiber, as the reference source of clock module. The clock source realized between AU, EU and RU tri-unit is same.
Fig. 3 is the schema of AU self-adaptation 6.5G/10G optical fiber speed of the present invention. AU is as the access unit of DAS system, and it is just passable that self-adaptation 6.5G/10G optical fiber speed only needs the speed according to subordinate's optical module to carry out adaptation, and the step of AU self-adaptation 6.5G/10G optical fiber speed is as follows:
A. after device start, first go detection light module in place by ARM, just wait not in place, if the speed just going detection light module in place;
If b. optical module speed is 10G, just start normal operation; If optical module speed is 6.5G, just must reconfigure the version of FPGA and the parameter of clock module, then start normal operation; After normal operation, in addition it is also necessary to continue detection light module in place, not in place, just return to wait; If in place, just continue normal operation.
Fig. 4 is the schema of EU/RU self-adaptation 6.5G/10G optical fiber speed of the present invention, and the step of EU/RU self-adaptation 6.5G/10G optical fiber speed is as follows:
First a.EU/RU detects the optical module docked with higher level after starting in place, if not in place, so impossible normal operation, just must wait;
B. after the optical module docked with higher level is in place, then the speed of this optical module is detected, if 10G, just directly start to detect the optical module docked with subordinate; If what dock with higher level is 6.5G optical module, it is necessary to reconfigure FPGA version and the parameter of clock module, then start to detect the optical module docked with subordinate;
If the optical module c. docked with subordinate is not in place, just continue to wait; If the optical module docked with subordinate is in place, just start to detect the speed of this optical module; If the speed of this optical module is 10G, just starting normal operation, initialize completes; If the speed of this optical module is 6.5G, it is necessary to startup part reshuffles the function of FPGA, is reshuffled by FPGA, and then start normal;
D. after starting normal operation, it is necessary to it is in place that first detection docks optical module with higher level, it is ensured that system still returns correct state after going wrong; If it is not in place, it is necessary to return a; If in place, just continue the state that optical module is docked in detection with subordinate;
If e. dock optical module with subordinate not in place, just return state c; If in place, whole system be described all still in the state of normal operation, return normal operation.
The above, be only the present invention and implement mode preferably, do not form limiting the scope of the present invention. Any amendment, equivalent replacement and improvement etc. done within spirit of the present invention, all should be included within the claims of the present invention.
Claims (4)
1. the self-adaptation method of 6.5G/10G optical fiber speed in a DAS system, it is characterised in that: having AU, EU and RU in DAS system respectively, base station signal, as access unit, is converted to numerary signal, passes through Optical Fiber Transmission by AU; EU as expanding element, for optical fiber relaying and expansion; RU is as far-end unit, and external antenna, for various indoor scene; The method step is as follows:
1), the upper ARM of AU in place according to docking optical module with subordinate equipment, optical module speed and can synchronous with next stage equipment (EU/RU) FPGA program and clock module being reconfigured;
2), the upper ARM of EU in place according to the optical module docked with higher level equipment, optical module speed and can synchronous with higher level equipment (AU/EU) clock module and FPGA program being reconfigured; In place according to the optical module docked with subordinate equipment (EU/RU) again, optical module speed is partly reshuffled with can synchronous with subordinate equipment be carried out by FPGA;
3), the upper ARM of RU in place according to the optical module docked with higher level equipment, optical module speed and can synchronous with higher level equipment (EU/RU) clock module and FPGA program being reconfigured.
2. the self-adaptation method of 6.5G/10G optical fiber speed in DAS system according to claim 1, it is characterised in that: the clock of AU, as major clock, provides reference clock to be used for Optical Fiber Transmission to the FPGA on AU; Clock module on EU and RU is from clock, and the FPGA on EU/RU can recover reference clock by optical fiber, as the reference source of clock module, it is achieved the clock source between AU, EU and RU tri-unit is same.
3. the self-adaptation method of 6.5G/10G optical fiber speed in DAS system according to claim 1, it is characterized in that: AU is as the access unit of DAS system, self-adaptation 6.5G/10G optical fiber speed adapts to according to the speed of subordinate's optical module, and the step of AU self-adaptation 6.5G/10G optical fiber speed is as follows:
A. after device start, first go detection light module in place by ARM, just wait not in place, if the speed just going detection light module in place;
If b. optical module speed is 10G, just start normal operation; If optical module speed is 6.5G, just must reconfigure the version of FPGA and the parameter of clock module, then start normal operation; After normal operation, in addition it is also necessary to continue detection light module in place, not in place, just return to wait; If in place, just continue normal operation.
4. the self-adaptation method of 6.5G/10G optical fiber speed in DAS system according to claim 1, it is characterised in that: the step of EU/RU self-adaptation 6.5G/10G optical fiber speed is as follows:
First a.EU/RU detects the optical module docked with higher level after starting in place, if not in place, so impossible normal operation, just must wait;
B. after the optical module docked with higher level is in place, then the speed of this optical module is detected, if 10G, just directly start to detect the optical module docked with subordinate; If what dock with higher level is 6.5G optical module, it is necessary to reconfigure FPGA version and the parameter of clock module, then start to detect the optical module docked with subordinate;
If the optical module c. docked with subordinate is not in place, just continue to wait; If the optical module docked with subordinate is in place, just start to detect the speed of this optical module; If the speed of this optical module is 10G, just starting normal operation, initialize completes; If the speed of this optical module is 6.5G, it is necessary to startup part reshuffles the function of FPGA, is reshuffled by FPGA, and then start normal;
D. after starting normal operation, it is necessary to it is in place that first detection docks optical module with higher level, it is ensured that system still returns correct state after going wrong; If it is not in place, it is necessary to return a; If in place, just continue the state that optical module is docked in detection with subordinate;
If e. dock optical module with subordinate not in place, just return state c; If in place, whole system be described all still in the state of normal operation, return normal operation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667809A (en) * | 2018-04-13 | 2018-10-16 | 三维通信股份有限公司 | A kind of implementation method of multisystem DAS WEB interfaces account information management by synchronization |
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| CN103260198A (en) * | 2012-02-17 | 2013-08-21 | 中兴通讯股份有限公司 | Dynamic allocating and matching method and device of distributed base station transmission rates |
| CN103379674A (en) * | 2013-07-24 | 2013-10-30 | 三维通信股份有限公司 | Multimode digital DAS supporting multi-information-source access |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012024349A1 (en) * | 2010-08-17 | 2012-02-23 | Dali Systems Co. Ltd. | Daisy-chained ring of remote units for a distributed antenna system |
| CN103260198A (en) * | 2012-02-17 | 2013-08-21 | 中兴通讯股份有限公司 | Dynamic allocating and matching method and device of distributed base station transmission rates |
| CN103178950A (en) * | 2013-03-08 | 2013-06-26 | 大唐移动通信设备有限公司 | Adaptive method and device for fiber interface rate of baseband unit RRU (radio remote unit) |
| CN103379674A (en) * | 2013-07-24 | 2013-10-30 | 三维通信股份有限公司 | Multimode digital DAS supporting multi-information-source access |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108667809A (en) * | 2018-04-13 | 2018-10-16 | 三维通信股份有限公司 | A kind of implementation method of multisystem DAS WEB interfaces account information management by synchronization |
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