WO2009021359A1 - Ensemble de gestion de cellules, système d'antennes distribué et procédé de réaffectation associé - Google Patents

Ensemble de gestion de cellules, système d'antennes distribué et procédé de réaffectation associé Download PDF

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Publication number
WO2009021359A1
WO2009021359A1 PCT/CN2007/002437 CN2007002437W WO2009021359A1 WO 2009021359 A1 WO2009021359 A1 WO 2009021359A1 CN 2007002437 W CN2007002437 W CN 2007002437W WO 2009021359 A1 WO2009021359 A1 WO 2009021359A1
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WIPO (PCT)
Prior art keywords
load information
load
topology
carrier
module
Prior art date
Application number
PCT/CN2007/002437
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English (en)
French (fr)
Inventor
Xiaobing Leng
Wei Zou
Shan Jin
Original Assignee
Alcatel Shanghai Bell Co., Ltd.
Alcatel Lucent
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Shanghai Bell Co., Ltd., Alcatel Lucent filed Critical Alcatel Shanghai Bell Co., Ltd.
Priority to CN2007801001391A priority Critical patent/CN101933353A/zh
Priority to PCT/CN2007/002437 priority patent/WO2009021359A1/zh
Publication of WO2009021359A1 publication Critical patent/WO2009021359A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices
    • H04W88/085Access point devices with remote components

Definitions

  • the present invention relates to a distributed antenna system technology, and more particularly to a cell management apparatus, a distributed antenna system, and a reconfiguration method thereof, which are capable of reallocating a carrier in time to effectively adapt to a load change when a communication traffic of a region varies greatly.
  • the Distributed Antenna System can improve the capacity and coverage of wireless systems, especially for indoor coverage.
  • the current trend in distributed antenna systems is to transmit digital wireless signals using fiber optic or unshielded twisted pair/shielded twisted pair (UTP/STP) cables, which are primarily digital baseband signals.
  • Fig. 1 it is the basic structure of the existing digital distributed antenna system 10.
  • the Remote Radio Head (RRH) 17 is placed around the building.
  • the primary hub 14 and the expansion hub 16 distribute downlink wireless signals to the remote radio unit 17 and collect uplink wireless signals for the base station 11. Since the transmitted signal is a digital wireless signal, it is easy to support multiple carriers and multiple base stations at the same time.
  • the present invention has been accomplished in view of the above problems.
  • the object of the present invention is to provide a cell management device, A distributed antenna system and a reconfiguration method thereof, which are capable of reallocating carriers in a timely and efficient manner when the communication traffic of a region varies greatly to adapt to load changes.
  • a distributed antenna system including a radio remote unit and a cell management device connected to the radio remote unit via an expansion hub, the cell management device being connected to a base station for
  • the radio remote unit distributes the downlink radio signal, collects the uplink radio signal, and transmits the uplink radio signal to the base station, and collects load information of the distributed antenna system, and reconfigures the distributed antenna system according to the load information.
  • a cell management apparatus which is connected to a base station and is connected to a radio remote unit via an extension hub, and is configured to distribute a downlink wireless signal to the radio remote unit and collect an uplink radio signal. Transmitting to the plug station, and collecting load information of the distributed antenna system and reconfiguring the distributed antenna system based on the load information.
  • a method for reconfiguring a distributed antenna system including: a cell management apparatus collecting load information of the distributed antenna system, and the distributed antenna system according to the load information Reconfigure.
  • the distributed antenna system can be dynamically reconfigured in a timely and effective manner according to the real-time load distribution, the load is balanced in time and the system efficiency is improved, and the convenience, real-time and accuracy of the configuration are greatly improved. And there is no need to interrupt the service, enabling online reconfiguration to ensure continuity of service during reconfiguration.
  • 1 is a basic structural diagram of a conventional digital distributed antenna system
  • FIG. 2 is a structural diagram of a distributed antenna system according to a first embodiment of the present invention
  • FIG. 3 is a structural diagram of a distributed antenna system according to a second embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a reconfiguration principle of a distributed antenna system according to a second embodiment of the present invention
  • FIG. 5 is another schematic diagram of a reconfiguration principle of a distributed antenna system according to a second embodiment of the present invention
  • FIG. 7 is a process flow diagram of a method for reconfiguring a distributed antenna system according to a third embodiment of the present invention
  • FIG. 8 is a structural diagram of a distributed antenna system according to a fourth embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a topology reconfiguration principle according to a fourth embodiment of the present invention.
  • Figure 10 depicts an initial state of one example of carrier reconfiguration in the fourth embodiment of the present invention
  • Figure 11 depicts an intermediate state of one example of carrier reconfiguration in the fourth embodiment of the present invention
  • Figure 12 depicts the fourth aspect of the present invention The final state of one example of carrier reconfiguration in the embodiment
  • FIG. 13 depicts an initial state of another example of carrier reconfiguration in the fourth embodiment of the present invention
  • FIG. 14 depicts carrier reconfiguration in the fourth embodiment of the present invention The final state of another example
  • 15 is a structural diagram of a distributed antenna system according to a fifth embodiment of the present invention
  • FIG. 16 is a flowchart of processing of reconfiguration of a distributed antenna system according to a fifth embodiment of the present invention
  • FIG. 17 is a schematic diagram of a working principle of a second dynamic reconfiguration module and a dynamic reconfiguration module according to a fifth embodiment of the present invention
  • FIG. 19 is a diagram showing an example of a processing flow of a second dynamic reconfiguration module and a dynamic reconfiguration module in the fifth embodiment of the present invention. detailed description
  • an embodiment of the present invention provides a distributed antenna system 20 including at least one radio remote unit (RRH) 26 and connected to the radio remote unit 26 via at least one expansion hub 25.
  • a cell management device (CMU) 24 the cell management device 24 is connected to the base station 21, and is configured to distribute a downlink wireless signal to the radio remote unit 26, collect an uplink wireless signal, and transmit the uplink radio signal to the base station 21. And collecting load information of the distributed antenna system 20 and reconfiguring the distributed antenna system 20 based on the load information.
  • the cell management device CMU 24 is a control center of the distributed antenna system 20, and the cell management device 24 is connected to the base station 21 and connected to the radio remote unit 26 via the expansion hub 25 for
  • the radio remote unit 26 distributes the downlink radio signal, collects the uplink radio signal and transmits it to the base station 21, and collects the load information of the distributed antenna system 20 and re-follows the distributed antenna system 20 according to the load information.
  • the interface 22 between the CMU 24 and the base station 21 can be a standard open base station architecture organization interface (OBSAI), a general public radio interface (CPRI), or a special local communication interface.
  • OBSAI open base station architecture organization interface
  • CPRI general public radio interface
  • An Extension Hub (Extension HUB) 25 is used to aggregate and distribute I/Q data to an extended coverage area.
  • RF remote unit RRH 26 is used for digital filtering, analog/digital-to-analog conversion, and analog front-end functions.
  • the transmission medium 23 of the distributed antenna system 20 may be an optical fiber or a UTP/STP cable, etc., and the transmission network may be a Gigabit Ethernet, and the transmitted wireless signal is a digital baseband signal.
  • the distributed antenna system 20 can support multiple carriers and multiple base stations, Medium RRH can also support multiple carriers.
  • the number of carriers supported depends on the wireless technology used and its operating bandwidth. For example, for 5MHz WiMAX technology, the digital baseband signal traffic is 137Mbps. If 25% of the credit is considered, the traffic is 171.25 Mbps, so a Gigabit Ethernet link can support 5 carriers.
  • a method for reconfiguring a distributed antenna system comprising: collecting load information of the distributed antenna system 20 by a cell management device 24, and performing the distribution according to the load information
  • the antenna system 20 is reconfigured.
  • the distributed antenna system 20 and its reconfiguration method according to an embodiment of the present invention reconfigure the distributed antenna system 20 by the CMU 24 according to the collected load information, instead of the prior art.
  • the administrator manually configures the service according to the estimated situation, so that the distributed wireless system 20 can be dynamically reconfigured in a timely and effective manner according to the real-time load distribution, balancing the load in time and improving system efficiency.
  • the convenience, real-time and accuracy of the configuration are greatly improved, and the business is not interrupted, and the continuity of the service is ensured.
  • the cell management apparatus 24 may include: a wireless signal processing module 31, configured to distribute downlink wireless signals to the radio remote unit 26.
  • the uplink wireless signal is collected and transmitted to the base station 21 ;
  • the load information collecting module 32 is configured to collect load information of the distributed antenna system 20;
  • the reconfiguration module 33 is configured to collect according to the load information collecting module 32.
  • the load information determine the new topology, re-allocate the carrier in the corresponding radio remote unit, and reconfigure the routing of the wireless signal.
  • FIGS. 4 and 5 are schematic diagrams showing the principle of reconfiguration of the distributed antenna system in the embodiment.
  • Figure 4 shows the initial configuration of the distributed antenna system 20.
  • the RRHA and RRH B use carrier 1, RRH C, and RRH D use carrier 2, RRH E, and carrier 3.
  • the load of carrier 2 and carrier 3 is transferred to the area of carrier 1, that is, when CMU 4 detects that RRHA and RRH B become temporary hot spot areas of high load
  • the distributed antenna system 20 is reconfigured.
  • RRHA uses carrier 1
  • RRH B uses carrier 2
  • RRH C, RRH D, R H E, and RRH F use carrier 3.
  • CMU 24 in the distributed antenna system 20 for obtaining load information and corresponding structures and methods are provided.
  • CMU 24 works at the physical layer The low sublayer does not participate in baseband processing, so the CMU 24 cannot directly learn the load information.
  • the distributed antenna system 20 includes a radio remote unit (RJ H) 26, an expansion hub 25, and a cell management device (CMU) connected to the radio remote unit 26 via the expansion hub 25. ) twenty four.
  • the cell management device 24 is connected to the base station 21, and is configured to distribute downlink radio signals to the radio remote unit 26, collect uplink radio signals, and transmit the uplink radio signals to the base station 21, and collect load information of the distributed antenna system 20. And reconfiguring the distributed antenna system 20 according to the load information.
  • the cell management device 24 includes: a wireless signal processing module 31, configured to distribute a downlink wireless signal to the remote radio unit 26, collect an uplink wireless signal, and transmit the uplink wireless signal to the base station 21; and a load information collecting module 32, configured to collect the The load information of the distributed antenna system 20, the reconfiguration module 33, configured to determine a new topology according to the load information collected by the load information collection module 32, re-allocate the carrier in the corresponding radio remote unit, and The routing of the signal is reconfigured.
  • a wireless signal processing module 31 configured to distribute a downlink wireless signal to the remote radio unit 26, collect an uplink wireless signal, and transmit the uplink wireless signal to the base station 21
  • a load information collecting module 32 configured to collect the The load information of the distributed antenna system 20
  • the reconfiguration module 33 configured to determine a new topology according to the load information collected by the load information collection module 32, re-allocate the carrier in the corresponding radio remote unit, and The routing of the signal is reconfigured.
  • the radio remote unit 26 includes a received power detecting module 41 for detecting the received total broadband power of the radio remote unit 26 and transmitting the detected power value to the load information collecting module 32.
  • the load information collection module 32 includes a first decision module 42 for receiving the power value sent by the received power detection module 41, and when the power value exceeds the threshold, notifying the reconfiguration module 33 according to the power value pair.
  • the distributed antenna system is reconfigured.
  • the reconfiguration module 33 includes: a topology reconfiguration module 44, configured to determine a corresponding new topology according to the load information collected by the load information collection module 32; a route reconfiguration module 45, configured to determine according to the topology reconfiguration module 44
  • the wireless signal routing is updated by reconfiguring the I/Q packet address and updating the routing table stored in the cell management device 24 and the expansion hub 25; the carrier reconfiguration module 46 is configured to reconfigure according to the topology
  • the new topology determined by module 44 switches the carrier of the corresponding radio remote unit 25.
  • the cell management device 24 receives the power information detected and transmitted by the RRH 26, compares it with a predefined threshold, and then decides whether to reconfigure the intelligent distributed antenna system.
  • This implementation does not require any changes to the base station and can obtain fine-grained (specific to each RRH) load information. However, if the C U wants to know more detailed load information, such as traffic load of different QoS, number of users, etc., it must resort to the base station or the base station control center.
  • the base station 21 may include a load information detecting module 210, configured to collect load information and send the information to the cell management apparatus.
  • the cell management device 24 includes a second decision mode Block 43 is configured to receive the load information and notify the reconfiguration module 33 to reconfigure the distributed antenna system 20 according to the load information when the load information meets a reconfiguration condition.
  • the load information detecting module 210 is disposed in each base station 21 for collecting various load information (for example, throughput, number of connections, number of registered users, etc.) and collecting the collected load information through the OBSAI /CPRI interface or local through the management channel.
  • the management interface is sent to the CMU.
  • Such an implementation is easy to implement, and detailed and accurate load information can be obtained, but the load information granularity is large (a flowchart of processing for the reconfiguration method of the distributed antenna system in the present embodiment for each carrier instead of each FIG. 7) If the first method for collecting load information is used, first, in step 701, the radio remote unit 26 detects the total received broadband power of the radio remote unit, and sends the detected power value to the cell management. Device 24.
  • step 702 the cell management device 24 receives the power value transmitted by the radio remote unit 26 via the extension hub 25, and when the power value exceeds the threshold, determines that the distributed antenna system 20 needs to be based on the power value. Perform reconfiguration (step 71), otherwise continue to repeat step 701.
  • step 703 the base station 21 collects the load information and transmits it to the cell management device 24. Then, in step 704, the cell management device 24 receives the load information sent by the base station 21, and when the load information meets the reconfiguration condition, determines that the distributed antenna system 20 needs to be reconfigured according to the load information (step 71), otherwise Repeat step 703.
  • step 72 the cell management device 24 determines a new topology based on the load information. Then in step 73, the cell management device 24 updates the wireless signal routing by reconfiguring the I/Q packet address and updating the routing table stored in the cell management device 24 and the expansion hub 25 in accordance with the determined new topology, and The carrier of the corresponding radio remote unit 26 is switched according to the determined new topology.
  • the distributed antenna system 20 includes a radio remote unit (RRH) 26, an expansion hub 25, and a cell management connected to the radio remote unit 26 via the expansion hub 25.
  • Device 24 The cell management device 24 is connected to the base station 21, and is configured to distribute downlink radio signals to the radio remote unit 26, collect uplink radio signals, and transmit the uplink radio signals to the base station 21. And collecting load information of the distributed antenna system 20 and reconfiguring the distributed antenna system 20 based on the load information.
  • the cell management device 24 includes: a wireless signal processing module 31, configured to distribute a downlink wireless signal to the remote radio unit 26, collect an uplink wireless signal, and transmit the uplink wireless signal to the base station 21; and a load information collecting module 32, configured to collect the The load information of the distributed antenna system 20, the reconfiguration module 33, configured to determine a new topology according to the load information collected by the load information collection module 32, re-allocate the carrier in the corresponding radio remote unit, and The routing of wireless signals is reconfigured.
  • a wireless signal processing module 31 configured to distribute a downlink wireless signal to the remote radio unit 26, collect an uplink wireless signal, and transmit the uplink wireless signal to the base station 21
  • a load information collecting module 32 configured to collect the The load information of the distributed antenna system 20
  • the reconfiguration module 33 configured to determine a new topology according to the load information collected by the load information collection module 32, re-allocate the carrier in the corresponding radio remote unit, and The routing of wireless signals is reconfigured.
  • the radio remote unit 26 includes a received power detecting module 41 for detecting the received total broadband power of the radio remote unit 26 and transmitting the detected power value to the load information collecting module 32.
  • the load information collection module 32 includes a first decision module 42 for receiving the power value sent by the received power detection module 41, and notifying the reconfiguration module 33 according to the power value when the power value exceeds the threshold value.
  • the distributed antenna system is reconfigured.
  • the reconfiguration module 33 includes: a topology reconfiguration module 44, configured to determine a corresponding new topology according to the load information collected by the load information collection module 32.
  • the route reconfiguration module 45 is configured to be configured according to the topology reconfiguration module 44. a new topology determined to update the wireless signal routing by reconfiguring the I/Q packet address and updating the routing table maintained in the cell management device 24 and the expansion hub 25; a carrier reconfiguration module 46 for the topology
  • the new topology determined by the reconfiguration module 44 switches the carrier of the corresponding radio remote unit 25.
  • the base station 21 also includes a load information detection module 210 for collecting load information and transmitting it to the cell management device.
  • the cell management device 24 further includes a second determining module 43, configured to receive the load information, and notify the reconfiguration module 33 to the distributed antenna according to the load information when the load information meets a reconfiguration condition.
  • System 20 is reconfigured. '
  • the topology reconfiguration module 44 includes: a storage module 51, configured to store a predefined topology, where the predefined topology corresponds to a combination of load information or load information; and a topology searching module 52, configured to collect the module according to the load information.
  • the combination of the collected load information or the load information is used to search for a topology stored by the storage module 51 corresponding to the combination of the load information or the load information, and the found topology is determined as a corresponding new topology.
  • the carrier reconfiguration module 46 includes: a power control module 53, configured to notify the base station to gradually reduce the transmit power of the carrier of the corresponding high-load radio remote unit according to the new topology determined by the topology reconfiguration module 44;
  • the switching module 54 is configured to be determined according to the topology reconfiguration module 44 The new topology informs the high-load radio remote unit to switch the carrier to the carrier of the corresponding low-load radio remote unit.
  • This embodiment provides an implementation manner for determining a new topology and a corresponding structure and method thereof. In most cases, temporary hotspot areas are foreseeable, such as auditoriums, halls, conference rooms, etc. In this case, the embodiment of this embodiment can be used to predefine all possible topologies and prepare them as Options are stored in the CMU.
  • the process of determining the new topology by the topology reconfiguration module 44 according to the load information includes: pre-storing a predefined topology, where the predefined topology corresponds to a combination of load information or load information; The combination of the load information or the load information searches for a pre-stored topology corresponding to the combination of the load information or the load information, and determines the found topology as a corresponding new topology.
  • the processing flow of the topology reconfiguration module 44 may further include: pre-storing an initial topology; configuring the distributed antenna system according to the initial topology when the distributed antenna system is started; When the antenna system is reconfigured and it is monitored that the combination of the load information or the load information returns to normal, the distributed antenna system is reconfigured based on the initial topology.
  • FIG. 9 is a schematic diagram of the topology reconfiguration principle of the embodiment.
  • the distributed wireless system 20 is configured according to the topology of the basic configuration 91 after startup. Taking two areas: Hall 1 and Hall 2 as an example, when the high load in Hall 1 is high, the distributed wireless system is reconfigured according to the topology of the corresponding temporary configuration 92 stored in advance, or when Hall 2 is high. When the load is distributed, the distributed wireless system performs reconfiguration according to the topology of the corresponding temporary configuration 93 stored in advance, or when both offices are heavily loaded, the distributed wireless system performs heavy according to the topology of the corresponding temporary configuration 94 stored in advance. Configuration. When the distributed wireless system transitions from the basic configuration to the temporary configuration 92, if the hall 1 becomes a low load, the distributed wireless system is reconfigured according to the original basic configuration 91, and so on.
  • This embodiment also provides an implementation manner of carrier reconfiguration and its corresponding structure and method.
  • the CMU performs carrier reconfiguration, although the base station can force the mobile terminal to switch carriers, the CMU can only know the RRH of the carrier to be switched, but does not know which mobile terminals use the RRH and needs to switch carriers, so the base station cannot be notified. Forcibly switch carriers for specific mobile terminals.
  • the embodiment of the present invention provides an implementation manner of the carrier reconfiguration and a corresponding structure, by gradually reducing the carrier to be switched.
  • the request for switching the carrier is sent, so that the base station can learn the specific mobile terminal that needs to switch the carrier, and switch the mobile terminal to the target carrier through the base station.
  • the processing procedure of the carrier reconfiguration module 46 includes: gradually reducing the transmit power of the carrier of the corresponding high-load radio remote unit according to the determined new topology; and then notifying according to the determined new topology.
  • the high-load radio remote unit switches the carrier to a carrier of a corresponding low-load radio remote unit.
  • the carrier of the corresponding low-load radio remote unit may be a neighboring available carrier. If there is no adjacent available carrier, the base station switches the mobile terminal to a specific target carrier after a predetermined delay time, which is a low-load target to which the RRH corresponding to the mobile terminal should be switched according to the determined new topology. Carrier. Obviously, the delay time should be greater than the time of the RRH handover carrier to switch the mobile terminal to the target carrier after the RRH switches to the target carrier.
  • the base station 101 transmits carriers Cl, C2 and distributes them to RJ H104 and RRH105.
  • Base station 102 transmits carriers C3, C4 and assigns them to RRH 106 and RRH 107.
  • the mobile terminal (MS) 108 is in the area al and uses the carrier C2.
  • the CMU 103 detects that the area al is a hotspot area based on the collected load information, and needs to switch some of the RRHs from the high-load carrier C2 to the low-load carriers C3 and C4.
  • the MS 108 transmits a handover request to the base station 101, thereby making the base station 101 aware that the MS 108 uses the carrier C2 in the hot spot area al.
  • the base station 101 switches the MS 108 to the adjacent carrier Cl and switches the RRH 105 to the carrier C3. Since the CMU 103 detects that the high load condition of the area al has not been alleviated according to the collected load information, in the same manner, the MS 108 is continuously switched to the carrier C4, and the RRH 105 is switched to the carriers C3 and C4.
  • load balancing is achieved.
  • FIG. 13 and 14 depict another example of an embodiment of carrier reconfiguration in the present embodiment, with base station 131 transmitting carrier C1 and assigning it to RRH 134 and RJRH 135.
  • Base station 132 transmits carrier C2 and assigns it to RRH 136 and RRH 137.
  • the mobile terminal (MS) 138 is in the area al and uses the carrier Cl.
  • the CMU 133 detects that the area al is a hotspot area based on the collected load information, and needs to switch some of the RRHs from the high-load carrier C1 to the low-load carrier C2.
  • the MS 138 transmits a handover request to the base station 131, thereby causing the base station 131 to know that the MS 138 uses the carrier C1 in the hot spot area a1.
  • base station 131 switches MS 138 to a nearby low load.
  • Carrier C2, and RRH 135 is switched to carrier C2 to achieve load balancing.
  • the distributed antenna system 20 includes a radio frequency remote unit (RRH) 26, an expansion hub 25, and an extension hub 25 and the radio remote unit.
  • RRH radio frequency remote unit
  • the cell management device 24 is connected to the base station 21 for distributing downlink radio signals to the radio remote unit 26, collecting uplink radio signals, transmitting to the base station 21, and collecting load information of the distributed antenna system 20. And reconfiguring the distributed antenna system 20 according to the load information.
  • the cell management device 24 includes: a wireless signal processing module 31, configured to distribute a downlink wireless signal to the remote radio unit 26, collect an uplink wireless signal, and transmit the uplink wireless signal to the base station 21; and a load information collecting module 32, configured to collect the The load information of the distributed antenna system 20, the reconfiguration module 33, configured to determine a new topology according to the load information collected by the load information collection module 32, re-allocate the carrier in the corresponding radio remote unit, and The routing of the signal is reconfigured.
  • a wireless signal processing module 31 configured to distribute a downlink wireless signal to the remote radio unit 26, collect an uplink wireless signal, and transmit the uplink wireless signal to the base station 21
  • a load information collecting module 32 configured to collect the The load information of the distributed antenna system 20
  • the reconfiguration module 33 configured to determine a new topology according to the load information collected by the load information collection module 32, re-allocate the carrier in the corresponding radio remote unit, and The routing of the signal is reconfigured.
  • the radio remote unit 26 includes a received power detecting module 41 for detecting the received total broadband power of the radio remote unit 26 and transmitting the detected power value to the load information collecting module 32.
  • the load information collection module 32 includes a first decision module 42 for receiving the power value sent by the received power detection module 41, and notifying the reconfiguration module 33 according to the power value when the power value exceeds the threshold value.
  • the distributed antenna system is reconfigured.
  • the reconfiguration module 33 includes: a topology reconfiguration module 44, configured to determine a corresponding new topology according to the load information collected by the load information collection module 32; a route reconfiguration module 45, configured to determine according to the topology reconfiguration module 44
  • the new topology updates the wireless signal routing by reconfiguring the I/Q packet address and updating the routing table stored in the cell management device 24 and the expansion hub 25;
  • the carrier reconfiguration module 46 is configured to perform topology reconfiguration
  • the new topology determined by module 44 switches the carrier of the corresponding radio remote unit 25.
  • the base station 21 also includes a load information detecting module 210 for collecting load information and transmitting it to the cell management device.
  • the cell management device 24 further includes a second decision module 43, configured to receive the load information, and notify the reconfiguration module 33 to the distributed antenna according to the load information when the load information meets a reconfiguration condition.
  • System 20 is reconfigured.
  • the topology reconfiguration module 44 includes: a first dynamic reconfiguration module 61, configured to: when receiving the total broadband power sent by the radio remote unit 26, determine the high according to the power value and the predetermined threshold value.
  • the loaded radio remote unit determines the new topology by assigning the carrier of the high-load radio remote unit to the carrier of the low-load radio remote unit (for example, in FIG. 4 and FIG. 5, the RRH B is switched by carrier 1).
  • second dynamic reconfiguration module 62 is configured to load information according to base station 21 when the cell management device 24 receives the load information sent by the base station 21.
  • a dynamic tracking configuration module 63 configured to detect the high load according to the received load information after the distributed antenna system 20 performs reconfiguration according to the new topology determined by the second dynamic reconfiguration module 62.
  • the radio frequency of the unexchanged carrier in the high load area is extended by a predetermined ratio of the carrier of the radio remote unit and the corresponding number of the low load area.
  • Carrier radio remote unit is assigned to obtain a new topology exchange, and repeating said step of determining the new topology, Gao until the load region is detected based on the received load information is no longer a high load.
  • the carrier reconfiguration module 46 includes: a power control module 53, configured to notify the base station to gradually reduce the transmit power of the carrier of the corresponding high-load radio remote unit according to the new topology determined by the topology reconfiguration module 44;
  • the switching module 54 is configured to notify the high-load radio remote unit to switch the carrier to the carrier of the corresponding low-load radio remote unit according to the new topology determined by the topology reconfiguration module 44.
  • This embodiment provides another implementation method for determining a new topology and its corresponding structure and method.
  • an indeterminate hotspot area such as a mobile group moving in an airport, or a train moving in a tunnel
  • dynamically construct a topology according to the load state and continuously maintain the dynamic configuration in the radio remote unit.
  • the carrier, spectrum resources will be adapted to the mobile hotspot area.
  • the CMU 24 does not need to store a predefined topology in advance.
  • the distributed antenna system 20 is configured in accordance with the topology of the basic configuration after startup.
  • the CMU 24 judges according to the load information that if there is a high load area, a new topology is constructed to transfer the low load carrier to the high load area.
  • the CMU 24 learns the high-load RRH, so the new dynamic reconfiguration module 61 can directly construct a new low-load carrier to the high-load RRH. Topology to achieve load balancing.
  • the processing flow of the first dynamic reconfiguration module 61 includes: determining a high-load radio remote unit according to load information sent by the radio remote unit, by pulling a high-load radio The carrier of the far unit is allocated with the carrier of the low-load radio remote unit to determine a new topology.
  • the CMU 24 only knows the high load area and does not know the specific high load RRH, and needs to pass the second dynamic reconfiguration module 62 and/or the dynamic tracking configuration module. 63 to establish a new topology.
  • the processing flow of the second dynamic reconfiguration module 62 includes: determining a high-load area according to the load information sent by the base station, by using a predetermined proportion of the radio remote unit in the high-load area The carrier is allocated with a carrier of a corresponding number of radio remote units in a low load region to determine a new topology.
  • the processing procedure of the dynamic tracking configuration module 63 includes: after the distributed antenna system performs reconfiguration according to the determined new topology, when the ⁇ is detected according to the received load information.
  • the carrier of the radio frequency extension unit in a predetermined proportion of the radio frequency of the unexchanged carrier in the high load area and the corresponding number of radio frequency remote units in the low load area are The carrier exchange is allocated to obtain a new topology, and the step of determining a new topology is repeated until it is detected that the high load region is no longer under high load based on the received load information.
  • the predetermined ratio may be 50%, that is, a distribution method using a dichotomy method, and a carrier of 50% of the radio remote unit in the load-bearing area and a corresponding number of radio frequencies in the low-load area are pulled.
  • the topology obtained after the carrier exchange of the far unit is determined is determined as a new topology.
  • the distributed antenna system is reconfigured according to the new topology determined by the second dynamic reconfiguration module, when it is detected that the high load region is still under load according to the received load information, the The carrier of 50% of the radio remote unit in the radio remote unit of the unexchanged carrier in the high load area and the carrier exchange of the corresponding number of radio remote units in the low load area are determined to be corresponding new Topology.
  • the step of determining a new topology is repeated until it is detected that the high load region is no longer under high load based on the received load information.
  • the new topology determined is dynamically established and not unique.
  • FIG. 16 is a flowchart of processing of reconfiguration of the distributed antenna system in the embodiment. If the first method for collecting load information is used, first, in step 701, the radio remote unit 26 detects the total received broadband power of the radio remote unit, and sends the detected power value to the cell management device. twenty four.
  • step 702 the cell management device 24 receives the power value sent by the radio remote unit 26, and when the power value exceeds the threshold, determines that the distributed antenna system 20 needs to be reconfigured according to the power value ( Step 71), otherwise repeat step 701.
  • step 703 the base station 21
  • the load information is collected and sent to the cell management device 24.
  • step 704 the cell management device 24 receives the load information sent by the base station 21, and when the load information meets the reconfiguration condition, determines that the distributed antenna system 20 needs to be reconfigured according to the load information (step 71), otherwise Repeat step 703.
  • the cell management device 24 After receiving the total broadband power sent by the radio remote unit 26, in step 721, the cell management device 24 determines the high-load radio remote unit according to the load information sent by the radio remote unit.
  • the new topology is determined by assigning a carrier exchange of a carrier of the high-load radio remote unit to a carrier of the low-load radio remote unit.
  • step 722 When receiving the load information sent by the base station 21, in step 722, determining a high-load area according to the load information sent by the base station, by using a predetermined proportion of the radio frequency remote unit in the high-load area A carrier exchange assignment of a corresponding number of radio remote units in the area of the load determines a new topology.
  • the cell management device 24 updates the wireless signal routing by reconfiguring the I/Q packet address and updating the routing table maintained in the cell management device 24 and the expansion hub 25 in accordance with the determined new topology; And gradually reducing the transmit power of the carrier of the corresponding high-load radio remote unit according to the determined new topology, and then notifying the high-load radio remote unit to switch the carrier to the corresponding low load according to the determined new topology.
  • the carrier of the radio remote unit is determining a high-load area according to the load information sent by the base station, by using a predetermined proportion of the radio frequency remote unit in the high-load area.
  • 17 and 18 are schematic diagrams showing the working principles of the second dynamic reconfiguration module 62 and the dynamic reconfiguration module 63 in the embodiment.
  • the carrier m in the temporary hotspot area determined according to the load information is a high load.
  • the carrier m is still under high load according to the load information. Therefore, half of the RRHs of the remaining unswitched carriers in the temporary hotspot area are switched to carrier n, and load balancing is achieved in this final topology state. ' .
  • the carrier m in the temporary hot spot area determined according to the load information is a high load.
  • the carrier n becomes a load according to the load information. Therefore, half of the RRHs of the remaining unswitched carriers in the temporary hotspot area are switched to the carrier m, and load balancing is achieved in this final topology state.
  • FIG. 19 is a diagram showing an example of the processing flow of the second dynamic reconfiguration module 62 and the dynamic reconfiguration module 63 in the embodiment.
  • the CMU 24 receives the load information transmitted by the base station 21.
  • step 192 the CMU 24 determines whether there is a carrier with a high load based on the load information, and if not, continues to monitor the load information. If yes, step 193 is executed to divide the RRHs in the highly loaded carrier region into two groups.
  • step 194 one of the sets of RRiis is switched to the carrier of the low load.
  • step 195 after the distributed antenna system is reconfigured, if the initially loaded carrier is still at a high load, step 196 and step 197 are performed, that is, in step 196, the RRHs of the remaining unswitched carriers are divided into two groups. One of the RRHs is then switched to the low load carrier in step 197.
  • steps 199 and 200 are performed, ie, in step 199, the new high load carrier region is RJRH. Divided into two groups, then in step 200 one of the RRHs is switched back to the carrier of the initial high load.
  • the distributed wireless system can be dynamically and timely reactivated according to the real-time load distribution situation. Configuration, balancing load and improving system efficiency in a timely manner; and no need to interrupt business, ensuring business continuity.
  • the performance of distributed antenna systems can be greatly improved, such as achieving high spectral efficiency, being suitable for complex applications, easy to maintain and manage, and providing users with as much bandwidth as possible anywhere and at any time.

Description

小区管理装置、 分布式天线系统及其重配置方法
技术领域
本发明涉及分布式天线系统技术, 特别涉及小区管理装置、 分布式天线系 统及其重配置方法,能够在区域的通信流量变化很大时及时有效地重新分配载波 以适应负载变化。 背景技术
分布式天线系统(DAS, Distributed Antenna System) 能够提髙无线系统的 容量和覆盖范围,特别是提髙室内覆盖范围。 目前分布式天线系统的发展趋势是 使用光纤或者非屏蔽双绞线 /屏蔽双绞线 (UTP/STP) 电缆来传送数字无线信号, 这里的数字无线信号主要是指数字基带信号。
如图 1所示, 为现有的数字化的分布式天线系统 10的基本结构。射频拉远 单元(RRH, Remote Radio Head) 17被设置于建筑物周围。 主集线器 14和扩展 集线器 16向射频拉远单元 17分发下行无线信号, 并为基站 11收集上行无线信 号。 由于所传送的信号为数字无线信号, 因此易于同时支持多载波和多基站。
—般地, 一旦分布式天线系统已被安装, 则对射频频谱的分配就固定了。 这种工作模式不适合于通信流量变化很大的区域, 例如礼堂、会议厅等。如果将 过多的频谱分配给这样的区域,则当这些区域空闲时会浪费频谱资源。但是如果 只对这些区域分配很少的频谱资源,则当这些区域变得拥挤时会导致频谱资源不 足。
现有的大多数分布式天线系统的不足之处在于: 不能在区域的通信流量变 化很大时及时有效地重新分配载波以适应负载变化,因此不能有效地解决上述技 术问题。其中一些分布式天线系统具有人工离线重配置功能, 也即需要管理员根 据预见的负载分布而进行人工的重新配置, 并且在重新配置期间需要停止业务。 显然,这种重新配置的方式并不能根据实时的流量分布而及时有效地进行动态的 重新配置, 并且不能实现重新配置期间的业务连续性。 发明内容
鉴于上述问题, 完成了本发明。 本发明的目的是提出一种小区管理装置、 分布式天线系统及其重配置方法,它能够在区域的通信流量变化很大时及时有效 地重新分配载波, 以适应负载变化。
根据本发明的一个方面, 提供了一种分布式天线系统, 包括射频拉远单元 以及经由扩展集线器与所述射频拉远单元连接的小区管理装置,所述小区管理装 置与基站连接,用于向所述射频拉远单元分发下行无线信号、收集上行无线信号 并传送给所述基站、以及收集所述分布式天线系统的负载信息并根据所述负载信 息对所述分布式天线系统进行重新配置。
根据本发明的另一方面, 提供了一种小区管理装置, 与基站连接, 并经由 扩展集线器与射频拉远单元连接, 用于向所述射频拉远单元分发下行无线信号、 收集上行无线信号并传送给所述塞站、以及收集所述分布式天线系统的负载信息 并根据所述负载信息对所述分布式天线系统进行重新配置。
根据本发明的另一方面,提供了一种分布式天线系统的重配置方法,包括: 小区管理装置收集所述分布式天线系统的负载信息,并根据所述负载信息对所述 分布式天线系统进行重新配置。
利用本发明, 能够根据实时的负载分布情况, 对分布式天线系统及时有效 地进行动态的重新配置,及时平衡负载并且提高系统效率, 同时大大提髙了配置 的方便性、 实时性以及准确性, 并且不需要中断业务, 能够实现在线重新配置, 保证在重新配置期间业务的连续性。 附图说明
通过下面结合附图说明本发明的优选实施例, 将使本发明的上述及其它目 的、 特征和优点更加清楚, 其中:
图 1为现有的数字化的分布式天线系统的基本结构图;
图 2为本发明第一实施例所提供的分布式天线系统的结构图;
图 3为本发明第二实施例所提供的分布式天线系统的结构图;
图 4为本发明第二实施例中分布式天线系统的重配置原理的示意图; 图 5为本发明第二实施例中分布式天线系统的重配置原理的另一示意图; 图 6为本发明第三实施例所提供的分布式天线系统的结构图;
图 7为本发明第三实施例中分布.式天线系统的重配置方法的处理流程图; 图 8为本发明第四实施例所提供的分布式天线系统的结构图;
图 9为本发明第四实施例的拓扑重配置原理的示意图;
图 10描述了本发明第四实施例中载波重配置的一个示例的初始状态; 图 11描述了本发明第四实施例中载波重配置的一个示例的中间状态; 图 12描述了本发明第四实施例中载波重配置的一个示例的最终状态; 图 13描述了本发明第四实施例中载波重配置的另一示例的初始状态; 图 14描述了本发明第四实施例中载波重配置的另一示例的最终状态; 图 15为本发明第五实施例所提供的分布式天线系统的结构图;
图 16为本发明第五实施例中分布式天线系统的重配置的处理流程图; 图' 17为本发明第五实施例中第二动态重配置模块以及动态重配置模块的 工作原理的示意图;
图 18 为本发明第五实施例中第二动态重配置模块以及动态重配置模块的 工作原理的另一示意图;
图 19为本发明第五实施例中第二动态重配置模块以及动态重配置模块的 处理流程的示例图。 具体实施方式
. 下面参照附图对本发明的实施例进行详细的说明, 在描述过程中省略了对 于本发明来说是不必要的细节和功能, 以防止对本发明的理解造成混淆。 ' 如图 2所示, 本发明的实施例提供了一种分布式天线系统 20, 包括至少一 个射频拉远单元(RRH) 26以及经由至少一个扩展集线器 25与所述射频拉远单 元 26连接的小区管理装置(CMU, Cell Management Unit) 24, 所述小区管理装 置 24与基站 21连接, 用于向所述射频拉远单元 26分发下行无线信号、 收集上 行无线信号并传送给所述基站 21、 以及收集所述分布式天线系统 20的负载信息 并根据所述负载信息对所述分布式天线系统 20进行重新配置。
根据本发明的实施例, 小区管理装置 CMU 24是所述分布式天线系统 20 的控制中心, 该小区管理装置 24与基站 21连接, 并经由扩展集线器 25与射频 拉远单元 26连接,用于向所述射频拉远单元 26分发下行无线信号、收集上行无 线信号并传送给所述基站 21、 以及收集分布式天线系统 20的负载信息并根据所 述负载信息对所述分布式天线系统 20进行重新配置。 CMU 24与基站 21之间的 接口 22可为标准开放式基站架构组织接口( OBSAI)、通用公共无线接口( CPRI)、 或者特殊的本地通信接口。
扩展集线器(Extension HUB) 25用于将 I/Q数据进行汇总和分发到扩展的 覆盖区域。射频拉远单元 RRH 26用于实现数字过滤、模数 /数模转换以及模拟前 端功能等。所述分布式天线系统 20的传输介质 23可为光纤或 UTP/STP电缆等, 传输网络可为吉比特以太网, 所传输的无线信号为数字基带信号。
根据本发明的实施例,所述分布式天线系统 20可支持多载波和多基站,其 中 RRH也可支持多载波。 所支持的载波数量取决于所釆用的无线技术及其工作 带宽。例如对于 5MHz的 WiMAX技术,数字基带信号流量为 137Mbps。如果考 虑到 25% 的幵销, 则流量为 171.25Mbps, 因此一条吉比特以太网链路能支持 5 个载波。
根据本发明的实施例,还提供了一种分布式天线系统的重配置方法,包括: 通过小区管理装置 24收集所述分布式天线系统 20的负载信息,并根据所述负载 信息对所述分布式天线系统 20进行重新配置。
根据本发明的实施例所提供的分布式天线系统 20及其重配置方法,通过由 CMU 24根据所收集的负载信息来对所述分布式天线系统 20进行重新配置, 而 非现有技术中的由管理员根据估计的情况在中断业务的情况下人工地进行配置, 从而能够根据实时的负载分布情况, 对分布式无线系统 20及时有效地进行动态 的重新配置, 及时平衡负载并且提高系统效率, 同时大大提高了配置的方便性、 实时性以及准确性, 并且不需要中断业务, 保证了业务的连续性。
如图 3所示, 根据本发明的另一实施例, 上述分布式无线系统 20中, 小区 管理装置 24可包括: 无线信号处理模块 31, 用于向所述射频拉远单元 26分发 下行无线信号、收集上行无线信号并传送给所述基站 21 ; 负载信息收集模块 32, 用于收集所述分布式天线系统 20的负载信息; 重配置模块 33, 用于根据所述负 载信息收集模块 32所收集的负载信息, 确定新的拓扑、 重新在相应的射频拉远 单元中分配载波、 以及对无线信号的路由进行重新配置。
图 4和图 5为本实施例中分布式天线系统的重配置原理的示意图。 图 4为 分布式天线系统 20的初始配置状态, RRHA、 RRH B使用载波 1, RRH C、 RRH D使用载波 2, RRH E、 使用载波 3。 当载波 2和载波 3的负载转移到载 波 1的区域, 即 CMU 4检测到 RRHA、 RRH B变为高负载的临时热点区域时, 对所述分布式天线系统 20进行重新配置。 如图 5所示, 为所述分布式天线系统 20重配置后的状态, RRHA使用载波 1, RRH B使用载波 2, RRH C、 RRH D、 R H E、 RRH F使用载波 3。显然,通过釆用本实施例所提供的分布式天线系统, 对于通信流量变化很大的区域, 例如礼堂、会议厅等, 能够根据当前的流量状态 来动态地分配射频资源, 大大平衡流量负载并且提髙系统效率。
根据本发明的另一实施例, 提供了所述分布式天线系统 20中的 CMU 24 获得负载信息的两种实施方式及相应的结构和方法。 CMU 24工作在物理层的较 低的子层并且不参与基带处理, 因此 CMU 24不能直接地获知负载信息。
如图 6所示,根据本实施例,分布式天线系统 20包括射频拉远单元(RJ H) 26, 扩展集线器 25以及经由扩展集线器 25与所述射频拉远单元 26连接的小区 管理装置 (CMU) 24。 所述小区管理装置 24与基站 21连接, 用于向所述射频 拉远单元 26分发下行无线信号、 收集上行无线信号并传送给所述基站 21、 以及 收集所述分布式天线系统 20的负载信息并根据所述负载信息对所述分布式天线 系统 20进行重新配置。
小区管理装置 24包括: 无线信号处理模块 31, 用于向所述射频拉远单元 26分发下行无线信号、 收集上行无线信号并传送给所述基站 21 ; 负载信息收集 模块 32, 用于收集所述分布式天线系统 20的负载信息; 重配置模块 33, 用于根 据所述负载信息收集模块 32所收集的负载信息, 确定新的拓扑、 重新在相应的 射频拉远单元中分配载波、 以及对无线信号的路由进行重新配置。
射频拉远单元 26包括接收功率检测模块 41,用于对射频拉远单元 26的接 收总宽带功率进行检测并将检测得到的功率值发送给所述负载信息收集模块 32。
负载信息收集模块 32包括第一判决模块 42, 用于接收所述接收功率检测 模块 41发送的功率值,并当该功率值 过门限值时,通知所述重配置模块 33根 据所述功率值对所述分布式天线系统进行重新配置。
重配置模块 33包括: 拓扑重配置模块 44, 用于根据所述负载信息收集模 块 32所收集的负载信息确定相应的新拓扑; 路由重配置模块 45, 用于根据拓扑 重配置模块 44所确定的新柘扑, 通过重新配置 I/Q数据包地址并更新所述小区 管理装置 24和扩展集线器 25中保存的路由表,对无线信号路由进行更新;载波 重配置模块 46, 用于根据拓扑重配置模块 44所确定的新拓扑, 对相应的射频拉 远单元 25的载波进行切换。
根据上述结构, 小区管理装置 24接收 RRH 26检测并发送的功率信息, 将 它与预先定义的门限相比较,然后判决是否重配置智能分布式天线系统。这种实 施方式不需要对基站做任何改动, 并且能够获得细粒度 (具体到每个 RRH) 的 负载信息。但是如果 C U希望知道更详细的负载信息,例如不同 QoS的流量负 载、 用户数量等等, 则必须求助于基站或者基站控制中心。
此外, 如图 6所示, 所述基站 21可以包括负载信息检测模块 210, 用于收 集负载信息并发送给所述小区管理装置。 所述小区管理装 24包括第二判决模 块 43, 用于接收所述负载信息并当该负载信息符合重配置条件时, 通知所述重 配置模块 33根据所述负载信息对所述分布式天线系统 20进行重新配置。
负载信息检测模块 210设于每个基站 21中,用于收集各种负载信息(例如 吞吐量、连接数量、注册用户数量等)并将所收集的负载信息通过管理信道经由 OBSAI /CPRI接口或者本地管理接口发送给 CMU。 这种实施方式易于实现, 并 且能获得详细精确的负载信息,但是负载信息粒度较大(针对每个载波而非每个 图 7为本实施例中分布式天线系统的重配置方法的处理流程图。 如果采用 第一种收集负载信息的实施方式, 则首先在步骤 701中, 射频拉远单元 26对该 射频拉远单元的接收总宽带功率进行检测,并将检测得到的功率值发送给小区管 理装置 24。
然后, 在步骤 702中, 小区管理装置 24接收射频拉远单元 26经由扩展集 线器 25发送的功率值, 并当该功率值超过门限值时, 确定需要根据所述功率值 对分布式天线系统 20进行重新配置 (步骤 71 ), 否则继续重复步骤 701。
如果釆用第二种收集负载信息的实施方式, 则首先在步骤 703中, 基站 21 收集负载信息并发送给小区管理装置 24。 然后, 在步骤 704中, 小区管理装置 24接收基站 21发送的负载信息, 并当该负载信息符合重配置条件时, 确定需要 根据负载信息对分布式天线系统 20进行重新配置(步骤 71 ),否则重复步骤 703。
在步骤 71后,在步骤 72中,小区管理装置 24根据所述负载信息确定新拓 扑。继而在步骤 73中,小区管理装置 24根据所确定的新拓扑,通过重新配置 I/Q 数据包地址并更新小区管理装置 24和扩展集线器 25中保存的路由表,对无线信 号路由进行更新, 并根据所确定的新拓扑, 对相应的射频拉远单元 26的载波进 行切换。
本领域的普通技术人员应当理解, 可根据实际应用场景的需要, 灵活选用 上述两种获得负载信息的实施方式的结构及其方法,或者应用其组合,其均在本 发明权利要求所限定的范围之内。
根据本发明的另一实施例, 如图 8所示,分布式天线系统 20包括射频拉远 单元 (RRH) 26, 扩展集线器 25以及经由扩展集线器 25与所述射频拉远单元 26连接的小区管理装置 24。 所述小区管理装置 24与基站 21连接, 用于向所述 射频拉远单元 26分发下行无线信号、 收集上行无线信号并传送给所述基站 21、 以及收集所述分布式天线系统 20的负载信息并根据所述负载信息对所述分布式 天线系统 20进行重新配置。
小区管理装置 24包括: 无线信号处理模块 31, 用于向所述射频拉远单元 26分发下行无线信号、 收集上行无线信号并传送给所述基站 21 ; 负载信息收集 模块 32,用于收集所述分布式天线系统 20的负载信息; 重配置模块 33, 用于根 据所述负载信息收集模块 32所收集'的负载信息, 确定新的拓扑、 重新在相应的 射频拉远单元中分配载波、 以及对无线信号的路由进行重新配置。
射频拉远单元 26包括接收功率检测模块 41, 用于对射频拉远单元 26的接 收总宽带功率进行检测并将检测得到的功率值发送给所述负载信息收集模块 32。
负载信息收集模块 32包括第一判决模块 42, 用于接收所述接收功率检测 模块 41发送的功率值,并当该功率值超过门限值时,通知所述重配置模块 33根 据所述功率值对所述分布式天线系统进行重新配置。
所述重配置模块 33包括: 拓扑重配置模块 44, 用于根据所述负载信息收 集模块 32所收集的负载信息确定相应的新拓扑; 路由重配置模块 45, 用于根据 拓扑重配置模块 44所'确定的新拓扑, 通过重新配置 I/Q数据包地址并更新所述 小区管理装置 24和扩展集线器 25中保存的路由表, 对无线信号路由进行更新; 载波重配置模块 46, 用于根据拓扑重配置模块 44所确定的新拓扑, 对相应的射 频拉远单元 25的载波进行切换。
基站 21还包括负载信息检测模玦 210, 用于收集负载信息并发送给所述小 区管理装置。 所述小区管理装置 24还包括第二 决模块 43, 用于接收所述负载 信息并当该负载信息符合重配置条件时, 通知所述重配置模块 33根据所述负载 信息对所述分布式天线系统 20进行重新配置。 '
拓扑重配置模块 44包括: 存储模块 51, 用于存储预先定义的拓扑, 所述 预先定义的拓扑与负载信息或负载信息的组合相对应; 拓扑査找模块 52, 用于 根据所述负载信息收集模块 32所收集的负载信息或负载信息的组合, 査找所述 存储模块 51所存储的、 与该负载信息或负载信息的组合相对应的拓扑, 将查找 到的拓扑确定为相应的新拓扑。
载波重配置模块 46包括: 功率控制模块 53, 用于根据所述拓扑重配置模 块 44所确定的新拓扑, 通知所述基站逐渐降低相应的高负载的射频拉远单元的 载波的发射功率; 载波切换模块 54, 用于根据所述拓扑重配置模块 44所确定的 新拓扑,通知所述高负载的射频拉远单元将载波切换为相应的低负载的射频拉远 单元的载波。
本实施例提供了一种确定新拓扑的实施方式及其相应的结构及方法。 在大 多数情况下, 临时的热点区域是可预见的, 例如那些礼堂、 大厅以及会议室等, 这种情况下可以釆用本实施例的实施方式,预先定义所有可能的拓扑并将其作为 备选项存储于 CMU中。
根据本实施例,所述拓扑重配置模块 44根据所述负载信息确定新拓扑的处 理流程包括:预先存储预先定义的拓扑,所述预先定义的拓扑与负载信息或负载 信息的组合相对应; 根据所述负载信息或负载信息的组合, 查找预先存储的、与 该负载信息或负载信息的组合相对应的拓扑,将査找到的拓扑确定为相应的新拓 扑。
优选地,所述拓扑重配置模块 44的处理流程还可包括:预先存储初始拓扑; 在所述分布式天线系统启动时根据所述初始拓扑对所述分布式天线系统进行配 置;在所述分布式天线系统重配置后并监测到所述负载信息或负载信息的组合恢 复正常时, 根搪所述初始拓扑对所述分布式天线系统进行重配置。
图 9为本实施例的拓扑重配置原理的示意图,分布式无线系统 20在启动后 按照基本配置 91的拓扑配置。 以两个区域: 1号厅和 2号厅为例, 当 1号厅内 高负载时分布式无线系统按照预先存储的对应的临时配置 92的拓扑来进行重配 置, 或者当 2号厅内高负载时分布式无线系统按照预先存储的对应的临时配置 93 的拓扑来进行重配置, 或者当两个厅都高负载时, 分布式无线系统按照预先 存储的对应的临时配置 94的拓扑来进行重配置。 当分布式无线系统从基本配置 转换到临时配置 92后, 如果 1号厅变为低负载, 则分布式无线系统又按照原先 的基本配置 91来重新配置, 以此类推。
本实施例还提供了一种载波重配置的实施方式及其相应的结构及方法。 在 CMU进行载波重配置时,虽然基站能够强制移动终端切换载波,但是由于 CMU 只能获知待切换载波的 RRH,而并不知道有哪些移动终端使用该 RRH而需要切 换载波, 因此并不能通知基站对具体的移动终端强制切换载波。 为了避免 RRH 的载波切换对移动终端 (MS)造成的业务中断, 保证业务的连续性, 本发明的 实施例提供了一种载波重配置的实施方式及相应的结构,通过逐渐降低待切换载 波的发射功率来模拟移动终端正在离开本小区的情况,使得移动终端主动向基站 发送切换载波的请求, 从而使得基站能够获知具体的需要切换载波的移动终端, 并通过基站将该移动终端切换到目标载波。
根据本实施例,所述载波重配置模块 46的处理流程包括:根据所确定的新 拓扑,逐渐降低相应的高负载的射频拉远单元的载波的发射功率;然后根据所确 定的新拓扑,通知所述高负载的射频拉远单元将载波切换为相应的低负载的射频 拉远单元的载波。
其中, 所述相应的低负载的射频拉远单元的载波可为邻近的可用载波。 如 果没有邻近的可用载波,则基站在预定的延迟时间后将移动终端切换到特定的目 标载波, 该目标载波即为根据所确定的新拓扑, 移动终端对应的 RRH应切换到 的低负载的目标载波。 显然, 所述延迟时间应当大于 RRH切换载波的时间, 以 便在 RRH切换到所述目标载波以后, 将移动终端切换到该目标载波。
图 10、 图 11及图 12描述了本实施例中载波重配置的一个示例。 基站 101 发射载波 Cl、 C2, 并分配给 RJ H104和 RRH105。 基站 102发射载波 C3、 C4, 并分配给 RRH106和 RRH107。移动终端(MS) 108在区域 al中并使用载波 C2。 在本示例中 CMU103根据收集的负载信息检测到区域 al为热点区域, 需要将其 中的部分 RRH从高负载的载波 C2切换到低负载的载波 C3和 C4。
在图 11所示的初始状态中,通过逐渐降低载波 C2的发射功率,使得 MS108 向基站 101发送切换请求,从而使基站 101获知 MS108在热点区域 al中使用载 波 C2。 在图 12所示的中间状态中, 基站 101将 MS108切换到邻近的载波 Cl, 并将 RRH105切换到载波 C3。由于 CMU103根据收集的负载信息检测到区域 al 的高负载情况仍未缓解, 通过同样的方式, 继续将 MS108切换到载波 C4, 并将 RRH105切换到载波 C3和 C4。从而在图 13所示的最终状态中, 达到负载平衡。
图 13及图 14描述了本实施例中载波重配置的实施方式的另一个示例, 基 站 131发射载波 C1并分配给 RRH134和 RJRH135。 基站 132发射载波 C2并分 配给 RRH136和 RRH137。 移动终端(MS) 138在区域 al中并使用载波 Cl。在 本示例中 CMU133根据收集的负载信息检测到区域 al为热点区域, 需要将其中 的部分 RRH从高负载的载波 C1切换到低负载的载波 C2。
在图 14所示的初始状态中,通过逐渐降低载波 C1的发射功率,使得 MS138 向基站 131发送切换请求,从而使得基站 131获知 MS138在热点区域 al中使用 载波 Cl。 在图 15所示的最终状态中, 基站 131将 MS138切换到邻近的低负载 的载波 C2, 并将 RRH 135切换到载波 C2, 从而达到负载平衡。
根据本发明的另一实施例, 如图 15所示, 分布式天线系统 20包括射频拉 远单元(RRH) 26, 扩展集线器 25以及经由扩展集线器 25与所述射频拉远单元
26连接的小区管理装置 24。
所述小区管理装置 24与基站 21连接,用于向所述射频拉远单元 26分发下 行无线信号、 收集上行无线信号并传送给所述基站 21、 以及收集所述分布式天 线系统 20的负载信息并根据所述负载信息对所述分布式天线系统 20进行重新配 置。
小区管理装置 24包括: 无线信号处理模块 31, 用于向所述射频拉远单元 26分发下行无线信号、 收集上行无线信号并传送给所述基站 21 ; 负载信息收集 模块 32, 用于收集所述分布式天线系统 20的负载信息; 重配置模块 33, 用于根 据所述负载信息收集模块 32所收集的负载信息, 确定新的拓扑、 重新在相应的 射频拉远单元中分配载波、 以及对无线信号的路由进行重新配置。
射频拉远单元 26包括接收功率检测模块 41, 用于对射频拉远单元 26的接 收总宽带功率进行检测并将检测得到的功率值发送给所述负载信息收集模块 32。
负载信息收集模块 32包括第一判决模块 42, 用于接收所述接收功率检测 模块 41发送的功率值,并当该功率值超过门限值时,通知所述重配置模块 33根 据所述功率值对所述分布式天线系统进行重新配置。
重配置模块 33包括: 拓扑重配置模块 44, 用于根据所述负载信息收集模 块 32所收集的负载信息确定相应的新拓扑; 路由重配置模块 45, 用于根据拓扑 重配置模块 44所确定的新拓扑, 通过重新配置 I/Q数据包地址并更新所述小区 管理装置 24和扩展集线器 25中保存的路由表,对无线信号路由进行更新;载波 重配置模块 46, 用于裉据拓扑重配置模块 44所确定的新拓扑, 对相应的射频拉 远单元 25的载波进行切换。
基站 21还包括负载信息检测模块 210, 用于收集负载信息并发送给所述小 区管理装置。所述小区管理装置 24还包括第二判决模块 43, 用于接收所述负载 信息并当该负载信息符合重配置条件时, 通知所述重配置模块 33根据所述负载 信息对所述分布式天线系统 20进行重新配置。
拓扑重配置模块 44包括: 第一动态重配置模块 61, 用于当收到射频拉远 单元 26发送的接收总宽带功率时, 根据该功率值与预定的门限值比较, 确定高 负载的射频拉远单元,通过将高负载的射频拉远单元的载波与低负载的射频拉远 单元的载波交换分配来确定新拓扑 (例如在图 4和图 5中, RRH B由载波 1切 换到载波 2, RRH C和 RRH D由载波 2切换到载波 3 );第二动态重配置模块 62, 用于当小区管理装置 24收到基站 21发送的负载信息时, 根据基站 21发送的负 载信息确定高负载的区域,通过将所迷高负载的区域中预定比例(例如 50%)的 射频拉远单元的载波与低负载的区域中相应数量的射频拉远单元的载波交换分 配来确定新拓扑; 动态跟踪配置模块 63, 用于在所述分布式天线系统 20根据所 述第二动态重配置模块 62所确定的新拓扑进行重配置后, 当根据收到的负载信 息检测到所述高负载的区域仍为高负载时,通过将所述高负载区域中的未交换载 波的射频拉远单元中预定比例的射频拉远单元的载波与低负载的区域中相应数 量的射频拉远单元的载波交换分配来获得新拓扑, 并重复所述确定新拓扑的步 骤, 直到根据收到的负载信息检测到所述髙负载区域不再为高负载。
载波重配置模块 46包括: 功率控制模块 53, 用于根据所述拓扑重配置模 块 44所确定的新拓扑, 通知所述基站逐渐降低相应的高负载的射频拉远单元的 载波的发射功率; 载波切换模块 54, 用于根据所述拓扑重配置模块 44所确定的 新拓扑,通知所述高负载的射频拉远单元将载波切换为相应的低负载的射频拉远 单元的载波。
本实施例提供了另一种确定新拓扑的实施方式及其相应的结构及方法。 对 于不确定的热点区域的情况, 例如机场中移动的人群、 或者隧道中移动的火车, 适合釆用本实施例提供的实施方式,根据负载状态动态构建拓扑,通过在射频拉 远单元中持续的动态配置载波, 频谱资源将与移动的热点区域相适应。
根据本实施例, CMU24不需要预先存储预定义的拓扑。 分布式天线系统 20在启动后按照基本配置的拓扑来进行配置。当 CMU24收到负载信息后,根据 负载信息判断如果存在高负载的区域则构建新的拓扑以便将低负载的载波转移 到高负载的区域。
如果 CMU24收到的负载信息为来自 RRH26的功率报告, 则 CMU24获知 了高负载的 RRH, 因此可以通过第一动态重配置模块 61直接构建将低负载的载 波分配给所述高负载的 RRH的新拓扑, 以达到负载平衡。
根据本实施例,所述第一动态重配置模块 61的处理流程包括:根据所述射 频拉远单元发送的负载信息确定高负载的射频拉远单元,通过将高负载的射频拉 远单元的载波与低负载的射频拉远单元的载波交换分配来确定新拓扑。
如果 CMU收到的负载信息为来自基站 21的负载信息, 则 CMU24只获知 了高负载的区域而不知道具体的高负载的 RRH, 需要通过第二动态重配置模块 62和 /或动态跟踪配置模块 63来建立新拓扑。
根据本实施例,所述第二动态重配萱模块 62的处理流程包括:根据所述基 站发送的负载信息确定高负载的区域,通过将所述高负载的区域中预定比例的射 频拉远单元的载波与低负载的区域中相应数量的射频拉远单元的载波交换分配 来确定新拓扑。 优选地, 根据本实施例, 所述动态跟踪配置模块 63的处理流程 包括:在所述分布式天线系统根据所确定的新拓扑进行重配置后, 当根据收到的 负载信息检测到所述髙负载的区域仍为高负载时,通过将所述高负载区域中的未 交换载波的射频拉远单元中预定比例的射频拉远单元的载波与低负载的区域中 相应数量的射频拉远单元的载波交换分配来获得新拓扑,并重复所述确定新拓扑 的步骤, 直到根据收到的负载信息检测到所述高负载区域不再为高负载。
优选地, 所述预定比例可为 50%, 也即釆用二分法的分配方式, 将所述髙 负载的区域中 50%的射频拉远单元的载波与低负载的区域中相应数量的射频拉 远单元的载波交换分配后获得的拓扑确定为新拓扑。在所述分布式天线系统根据 所述第二动态重配置模块所确定的新拓扑进行重配置后,当根据收到的负载信息 检测到所述高负载的区域仍为髙负载时,将所述高负载区域中的未交换载波的射 频拉远单元中 50%的射频拉远单元的载波与低负载的区域中相应数量的射频拉 远单元的载波交换分配后获得的 ¾扑确定为相应的新拓扑。重复所述确定新拓扑 的步骤, 直到根据收到的负载信息检测到所述高负载区域不再为高负载。 显然, 对于这种实施方式而言, 所确定的新拓扑是动态建立的, 并且不是唯一的。
图 16为本实施例中分布式天线系统的重配置的处理流程图。如果采用第一 种收集负载信息的实施方式, 则首先在步骤 701中, 射频拉远单元 26对该射频 拉远单元的接收总宽带功率进行检测,并将检测得到的功率值发送给小区管理装 置 24。
然后, 在步骤 702中, 小区管理装置 24接收射频拉远单元 26发送的功率 值, 并当该功率值超过门限值时, 确定需要根据所述功率值对分布式天线系统 20进行重新配置(步骤 71 ), 否则重复步骤 701。
如果釆用第二种收集负载信息的实施方式, 则首先在步骤 703中, 基站 21 收集负载信息并发送给小区管理装置 24。
然后, 在步骤 704中, 小区管理装置 24接收基站 21发送的负载信息, 并 当该负载信息符合重配置条件时, 确定需要根据负载信息对分布式天线系统 20 进行重新配置 (步骤 71 ), 否则重复步骤 703。
在步骤 71后, 当收到射频拉远单元 26发送的接收总宽带功率时, 在步骤 721 中, 小区管理装置 24根据所述射频拉远单元发送的负载信息确定高负载的 射频拉远单元,通过将高负载的射频拉远单元的载波与低负载的射频拉远单元的 载波交换分配来确定新拓扑。
当收到基站 21发送的负载信息时,在步骤 722中,根据所述基站发送的负 载信息确定高负载的区域,通过将所述高负载的区域中预定比例的射频拉远单元 的载波与低负载的区域中相应数量的射频拉远单元的载波交换分配来确定新拓 扑。 继而在步骤 730中, 小区管理装置 24根据所确定的新拓扑, 通过重新配置 I/Q数据包地址并更新小区管理装置 24和扩展集线器 25中保存的路由表, 对无 线信号路由进行更新; 并根据所确定的新拓扑,逐渐降低相应的高负载的射频拉 远单元的载波的发射功率,然后根据所确定的新拓扑,通知所述高负载的射频拉 远单元将载波切换为相应的低负载的射频拉远单元的载波。
图 17和图 18为本实施例中所述第二动态重配置模块 62以及动态重配置模 块 63的工作原理的示意图。
如图 17所示,在分布式天线系统的初始拓扑状态,根据负载信息确定的临 时热点区域中载波 m为高负载。在将临时热点区域中的一半的 RRH的载波切换 为载波 n后的中间拓扑状态, 根据负载信息发现载波 m仍然为高负载。 因此继 续将临时热点区域中剩余未切换载波的 RH中的一半的 RRH切换到载波 n,在 这个最终拓扑状态达到了负载平衡。 ' .
如图 18所示,在分布式天线系统的初始拓扑状态,根据负载信息确定的临 时热点区域中载波 m为高负载。在将临时热点区域中的一半的 RRH的载波切换 为载波 n后的中间拓扑状态,根据负载信息发现载波 n变为髙负载。因此继续将 临时热点区域中剩余未切换载波的 RRH中的一半的 RRH切换到载波 m, 在这 个最终拓扑状态达到了负载平衡。
图 19为本实施例中所述第二动态重配置模块 62以及动态重配置模块 63的 处理流程的示例图。 在步骤 191, CMU24收到基站 21发送的负载信息。
在步骤 192, CMU24根据该负载信息判断是否有高负载的载波, 如果没有 就继续监测负载信息,如果有则执行步骤 193,即将高负载的载波区域中的 RRH 划分为两组。
然后, 在步骤 194将其中一组 RRii切换到低负载的载波。
在步骤 195中, 在分布式天线系统重配置后, 如果起初髙负载的载波仍然 为高负载, 则执行步骤 196和步骤 197, 即在步骤 196中将剩余未切换载波的 RRH划分为两组, 然后在步骤 197中将其中一组 RRH切换到低负载的载波。
如果起初高负载的载波变为低负载, 而起初低负载的载波变为高负载 (步 骤 198),则执行步骤 199和步骤 200, 即在步骤 199中将新的高负载的载波区域 中的 RJRH划分为两组,然后在步骤 200中将其中一组 RRH切换回起初高负载的 载波。
通过采用本发明的实施例所提供的分布式天线系统重配置的方法以及相应 的分布式天线系统和小区管理装置, 能够根据实时的负载分布情况,对分布式无 线系统及时有效地进行动态的重新配置,及时平衡负载并且提高系统效率;并且 不需要中断业务, 保证了业务的连续性。 因此, 能够大大提髙分布式天线系统的 性能, 例如获得高频谱效率、适用于复杂的应用、 易于维护和管理等, 并且能够 在任何地方和任何时间为用户提供尽可能多的带宽。
以上实施例仅用以说明本发明的技术方案,而非对本发明作限制性理解。尽 管参照上述较佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理 解:其依然可以对本发明的技术方案 ίί行修改或者等同替换,而这种修改或者等 同替换并不脱离本发明技术方案的精神和范围。在权利要求中, 术语"包括"等 并非排除除了列入任何权利要求或整体说明书中的元件或歩骤之外的元件或步 骤。本发明可以通过包括数个独立元件的硬件来实施, 也可通过适当的程控计算 机来实施。在列举数个方法的权利要求中,这些方法中的数个可以通过一项同样 的硬件来实施。在互相不同的从属权利要求中陈述的某些方案并非指示这些方案 的组合不能被用于优化。

Claims

权利 要 求
1、一种分布式天线系统,包括射频拉远单元以及经由扩展集线器与所述射 频拉远单元连接的小区管理装置,所述小区管理装置与基站连接,用于向所述射 频拉远单元分发下行无线信号、收集上行无线信号并传送给所述基站、以及收集 所述分布式天线系统的负载信息并根据所述负载信息对所述分布式天线系统进 行重新配置。
2、 如权利要求 1所述的分布式天线系统, 所述小区管理装置包括- 无线信号处理模块, 用于向所述射频拉远单元分发下行无线信号、 收集上 行无线信号并传送给所述基站;
负载信息收集模块, 用于收集所述分布式天线系统的负载信息; 重配置模块, 用于根据所述负载信息收集模块所收集的负载信息, 确定新 的拓扑、重新在相应的射频拉远单元中分配载波、以及对无线信号的路由进行重 新配置。
3、如权利要求 2所述的分布式天线系统,所述射频拉远单元包括接收功率 检测模块,用于对射频拉远单元的接收总宽带功率进行检测并将检测得到的功率 值发送给所述负载信息收集模块;
所述负载信息收集模块包括第一判决模块, 用于接收所述接收功率检测模 块发送的功率值,并当该功率值超过门限值时,通知所述重配置模块根据所述功 率值对所述分布式天线系统进行重新配置。
4、如权利要求 2所述的分布式关线系统,所述基站包括负载信息检测模块, 用于收集负载信息并发送给所述小区管理装置;
所述小区管理装置包括第二判决模块, 用于接收所述负载信息并当该负载 信息符合重配置条件时,通知所述重配置模块根据所述负载信息对所述分布式天 线系统进行重新配置。'
5、 如权利要求 2-4任一所述的分布式天线系统, 所述重配置模块包括: 拓扑重配置模块, 用于根据所述负载信息收集模块所收集的负载信息确定 相应的新拓扑;
路由重配置模块, 用于根据拓扑重配置模块所确定的新拓扑, 通过重新配 置 I/Q数据包地址并更新所述小区管理装置和扩展集线器中保存的路由表,对无 线信号路由进行更新;
载波重配置模块, 用于根据拓扑重配置模块所确定的新拓扑, 对相应的射 频拉远单元的载波进行切换。
6、 如权利要求 5所述的分布式夭线系统, 所述拓扑重配置模块包括: 存储模块, 用于存储预先定义的拓扑, 所述预先定义的拓扑与负载信息或 负载信息的组合相对应;
拓扑査找模块, 用于根据所述负载信息收集模块所收集的负载信息或负载 信息的组合,査找所述存储模块所存储的、与该负载信息或负载信息的组合相对 应的拓扑, 将查找到的拓扑确定为相应的新拓扑。
7、如权利要求 5所述的分布式天线系统, 所述拓扑重配置模块包括: 第一 动态重配置模块,用于根据所述射频拉远单元发送的负载信息确定高负载的射频 拉远单元,通过将高负载的射频拉远单元的载波与低负载的射频拉远单元的载波 交换分配来确定新拓扑。
8、 如权利要求 5所述的分布式天线系统, 所述拓扑重配置模块包括: 第二动态重配置模块, 用于根据所述基站发送的负载信息确定高负载的区 域,通过将所述高负载的区域中预定比例的射频拉远单元的载波与低负载的区域 中相应数量的射频拉远单元的载波交换分配来确定新拓扑;
动态跟踪配置模块, 用于在所述分布式天线系统根据所述第二动态重配置 模块所确定的新拓扑进行重配置后,当根据收到的负载信息检测到所述髙负载的 区域仍为高负载时,通过将所述高负载区域中的未交换载波的射频拉远单元中预 定比例的射频拉远单元的载波与低负载的区域中相应数量的射频拉远单元的载 波交换分配来获得新拓扑,并重复所述确定新拓扑的步骤,直到根据收到的负载 信息检测到所述高负载区域不再为高负载。
9、 如权利要求 5所述的分布式天线系统, 所述载波重配置模块包括- 功率控制模块, 用于根据所述拓扑重配置模块所确定的新拓扑, 通知所述 基站逐渐降低相应的高负载的射频拉远单元的载波的发射功率;
载波切换模块, 用于根据所述拓扑重配置模块所确定的新拓扑, 通知所述 高负载的射频拉远单元将载波切换为相应的低负载的射频拉远单元的载波。
10、 一种小区管理装置, 与基站连接, 并经由扩展集线器与射频拉远单元 连接,用于向所述射频拉远单元分发下行无线信号、收集上行无线信号并传送给 所述基站、以及收集分布式天线系统的负载信息并根据所述负载信息对所述分布 式天线系统进行重新配置。
11、 如权利要求 10所述的小区管理装置, 包括:
无线信号处理模块, 用于向所述射频拉远单元分发下行无线信号、 收集上 行无线信号并传送给所述基站;
负载信息收集模块, 用于收集所述分布式天线系统的负载信息; 重配置模块, 用于根据所述负载信息收集模块所收集的负载信息, 确定新 的拓扑、重新在相应的射频拉远单元中分配载波、 以及对无线信号的路由进行重 新配置。
12、 如权利要求 11所述的小区管理装置, 包括第一判决模块, 用于接收所 述射频拉远单元检测并发送的接收总宽带功率的功率值,并当该功率值超过门限 值时, 通知所述重配置模块根据所述功率值对所述分布式天线系统进行重新配 置。
13、 如权利要求 11所述的小区管理装置, 包括第二判决模块, 用于接收所 述基站收集并发送的负载信息并当该负载信息符合重配置条件时,通知所述重配 置模块根据所述负载信息对所述分布式天线系统进行重新配置。
14、 如权利要求 11-13任一所述的小区管理装置, 所述重配置模块包括: 拓扑重配置模块, 用于根据所述负载信息收集模块所收集的负载信息确定 相应的新拓扑;
路由重配置模块, 用于根据拓扑重配置模块所确定的新拓扑, 通过重新配 置 I/Q数据包地址并更新所述小区管理装置和扩展集线器中保存的路由表,对无 线信号路由进行更新;
载波重配置模块, 用于根据拓扑重配置模块所确定的新拓扑, 对相应的射 频拉远单元的载波进行切换。
15、 如权利要求 14所述的小区管理装置, 所述拓扑重配置模块包括: 存储模块, 用于存储预先定义的拓扑, 所述预先定义的拓扑与负载信息或 负载信息的组合相对应;
拓扑査找模块, 用于根据所述负载信息收集模块所收集的负载信息或负载 信息的组合, 査找所述存储模块所存储的、与该负载信息或负载信息的组合相对 应的拓扑, 将査找到的拓扑确定为相应的新拓扑。
16、如权利要求 14所述的小区管理装置, 所述拓扑重配置模块包括: 第一 动态重配置模块,用于根据所述射频拉远单元发送的负载信息确定高负载的射频 拉远单元,通过将高负载的射频拉远单元的载波与低负载的射频拉远单元的载波 交换分配来确定新拓扑。
17、 如权利要求 14所述的小区管理装置, 所述拓扑重配置模块包括: 第二动态重配置模块, 用于根据所述基站发送的负载信息确定高负载的区 域,通过将所述髙负载的区域中预定比例的射频拉远单元的载波与低负载的区域 中相应数量的射频拉远单元的载波交换分配来确定新拓扑;
动态跟踪配置模块, 用于在所述分布式天线系统根据所述第二动态重配置 模块所确定的新拓扑进行重配置后,当根据收到的负载信息检测到所述高负载的 区域仍为高负载时,通过将所述高负载区域中的未交换载波的射频拉远单元中预 定比例的射频拉远单元的载波与低负载的区域中相应数量的射频拉远单元的载 波交换分配来获得新拓扑, 并重复所述确定新拓扑的步骤,直到根据收到的负载 信息检测到所述高负载区域不再为高负载。
18、 如权利要求 14所述的小区管理装置, 所述载波重 E置模块包括: 功率控制模块, 用于根据所述拓扑重配置模块所确定的新拓扑, 通知所述 基站逐渐降低相应的髙负载的射频拉远单元的载波的发射功率;
载波切换模块, 用于根据所述拓扑重配置模块所确定的新拓扑, 通知所述 高负载的射频拉远单元将载波切换为相应的低负载的射频拉远单元的载波。
19、一种分布式天线系统的重配置方法, 包括:
收集所述分布式天线系统的负载信息;
根据所述负载信息对所述分布式天线系统进行重新配置。
20、如权利要求 19所述的重配置方法,所述收集所述分布式天线系统的负 载信息包括: '
所述射频拉远单元对该射频拉远单元的接收总宽带功率进行检测, 并将捡 测得到的功率值发送给所述小区管理装置;
所述小区管理装置接收所述射频拉远单元发送的功率值, 并当该功率值超 过门限值时, 确定需要根据所述功率值对所述分布式天线系统进行重新配置。
21、如权利要求 19所述的重配置方法,所述收集所述分布式天线系统的负 载信息包括- 所述基站收集负载信息并发送给所述小区管理装置;
所述小区管理装置接收所述基站发送的负载信息, 并当该负载信息符合重 配置条件时, 确定需要根据所述负载信息对所述分布式天线系统进行重新配置。
22、 如权利要求 20或 21所述的重配置方法, 所述根据所述负载信息对所 述分布式天线系统进行重新配置包括:
所述小区管理装置根据所述负载信息确定新拓扑;
根据所确定的新拓扑, 通过重新配置 I/Q数据包地址并更新所述小区管理 装置和扩展集线器中保存的路由表, 对无线信号路由进行更新;
根据所确定的新拓扑, 对相应的射频拉远单元的载波进行切换。
23、如权利要求 22所述的重配置方法, 所述根据所述负载信息确定新拓扑 包括:
预先存储预先定义的拓扑, 所述预先定义的拓扑与负载信息或负载信息的 组合相对应;
根据所述负载信息或负载信息的组合, 查找预先存储的、 与该负载信息或 负载信息的组合相对应的拓扑, 将查找到的拓扑确定为相应的新拓扑。
24、 如权利要求 22所述的重配置方法, 还包括:
预先存储初始拓扑;
在所述分布式天线系统启动时根据所述初始拓扑对所述分布式天线系统进 行配置;
在所述分布式天线系统重配置后并监测到所述负载信息或负载信息的组合 恢复正常时, 根据所述初始拓扑对所述分布式天线系统进行重配置。
25、如权利要求 22所述的重配置方法,所述根据所述负载信息确定新拓扑 包括: 根据所述射频拉远单元发送的负载信息确定高负载的射频拉远单元, 通过 将高负载的射频拉远单元的载波与低负载的射频拉远单元的载波交换分配来确 定新拓扑。
26、如权利要求 22所述的重配置方法,所述根据所述负载信息确定新拓扑 包括: 根据所述基站发送的负载信息确定高负载的区域, 通过将所述高负载的区 域中预定比例的射频拉远单元的载波与低负载的区域中相应数量的射频拉远单 元的载波交换分配来确定新拓扑。
27、如权利要求 26所述的重配置方法,所述根据所述负载信息确定新拓扑 还包括:在所述分布式天线系统根据所确定的新拓扑进行重配置后, 当根据收到 的负载信息检测到所述高负载的区域仍为高负载时,通过将所述高负载区域中的 未交换载波的射频拉远单元中预定比例的射频拉远单元的载波与低负载的区域 中相应数量的射频拉远单元的载波交换分配来获得新拓扑,并重复所述确定新拓 扑的步骤, 直到根据收到的负载信息检测到所述高负载区域不再为高负载。
28、如权利要求 22所述的重配置方法,所述根据所确定的新拓扑对相应的 射频拉远单元的载波进行切换包括:
根据所确定的新拓扑, 逐渐降低相应的高负载的射频拉远单元的载波的发 射功率;
然后根据所确定的新拓扑, 通知所述髙负载的射频拉远单元将载波切换为 相应的低负载的射频拉远单元的载波。
PCT/CN2007/002437 2007-08-14 2007-08-14 Ensemble de gestion de cellules, système d'antennes distribué et procédé de réaffectation associé WO2009021359A1 (fr)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011110071A1 (zh) * 2010-08-27 2011-09-15 华为技术有限公司 基带信号传输方法和装置
CN103001673A (zh) * 2011-09-08 2013-03-27 孔令斌 宽带分布式天线系统和数据通信方法
CN103155434A (zh) * 2010-06-18 2013-06-12 安德鲁有限责任公司 具有改进的数据传输特征的数字分布天线系统
CN103733664A (zh) * 2011-07-11 2014-04-16 安德鲁有限责任公司 用于管理分布式天线系统的方法和设备
US9913147B2 (en) 2012-10-05 2018-03-06 Andrew Wireless Systems Gmbh Capacity optimization sub-system for distributed antenna system
IT201600131387A1 (it) * 2016-12-27 2018-06-27 Teko Telecom S R L Unita’ radio remota riconfigurabile per sistemi distribuiti d’antenna
CN111491391A (zh) * 2020-04-09 2020-08-04 京信通信系统(中国)有限公司 小区调度方法、电子设备、存储介质及分布式天线系统
EP4236616A3 (en) * 2017-04-27 2023-12-13 Mitsubishi Electric Corporation Communication system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111683383B (zh) * 2020-06-08 2023-03-24 太仓市同维电子有限公司 一种智能控制器及分布式室分5g系统多小区负载均衡的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794153A (en) * 1995-12-26 1998-08-11 Lucent Technologies Inc. Estimating PCS traffic from radio port measurements
CN1500361A (zh) * 2001-02-01 2004-05-26 高通股份有限公司 建筑内系统的动态容量分配
CN1593023A (zh) * 2001-11-30 2005-03-09 艾利森电话股份有限公司 采用无线光链路的蜂窝通信系统
CN1642339A (zh) * 2005-01-06 2005-07-20 东南大学 分布式蜂窝移动通信网络结构
CN1647558A (zh) * 2002-02-25 2005-07-27 无线电框架网络公司 具有分布式实时处理的无线电系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPQ412899A0 (en) * 1999-11-18 1999-12-09 Prescient Networks Pty Ltd A gateway system for interconnecting wireless ad-hoc networks
CN1905729A (zh) * 2005-07-29 2007-01-31 西门子(中国)有限公司 分布式天线系统中的无线通信资源配置方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794153A (en) * 1995-12-26 1998-08-11 Lucent Technologies Inc. Estimating PCS traffic from radio port measurements
CN1500361A (zh) * 2001-02-01 2004-05-26 高通股份有限公司 建筑内系统的动态容量分配
CN1593023A (zh) * 2001-11-30 2005-03-09 艾利森电话股份有限公司 采用无线光链路的蜂窝通信系统
CN1647558A (zh) * 2002-02-25 2005-07-27 无线电框架网络公司 具有分布式实时处理的无线电系统
CN1642339A (zh) * 2005-01-06 2005-07-20 东南大学 分布式蜂窝移动通信网络结构

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103155434B (zh) * 2010-06-18 2016-08-24 康普技术有限责任公司 在分布天线系统的端点间传输数字数据的方法和端点元件
CN103155434A (zh) * 2010-06-18 2013-06-12 安德鲁有限责任公司 具有改进的数据传输特征的数字分布天线系统
US10742348B2 (en) 2010-06-18 2020-08-11 Commscope Technologies Llc Transport data reduction for DAS systems
US9800369B2 (en) 2010-06-18 2017-10-24 Commscope Technologies Llc Transport data reduction for DAS systems
CN102377477A (zh) * 2010-08-27 2012-03-14 华为技术有限公司 基带信号传输方法和装置
US9066252B2 (en) 2010-08-27 2015-06-23 Huawei Technologies Co., Ltd. Method and apparatus for transmitting baseband signals
WO2011110071A1 (zh) * 2010-08-27 2011-09-15 华为技术有限公司 基带信号传输方法和装置
CN103733664A (zh) * 2011-07-11 2014-04-16 安德鲁有限责任公司 用于管理分布式天线系统的方法和设备
US10938450B2 (en) 2011-07-11 2021-03-02 Commscope Technologies Llc Base station router for distributed antenna systems
US10063287B2 (en) 2011-07-11 2018-08-28 Commscope Technologies Llc Base station router for distributed antenna systems
CN103001673A (zh) * 2011-09-08 2013-03-27 孔令斌 宽带分布式天线系统和数据通信方法
US9913147B2 (en) 2012-10-05 2018-03-06 Andrew Wireless Systems Gmbh Capacity optimization sub-system for distributed antenna system
US10412595B2 (en) 2012-10-05 2019-09-10 Andrew Wireless Systems Gmbh Capacity optimization sub-system for distributed antenna system
WO2018122690A1 (en) * 2016-12-27 2018-07-05 Teko Telecom S.R.L. Reconfigurable radio remote unit for distributed antenna systems
US10841977B2 (en) 2016-12-27 2020-11-17 Teko Telecom S.R.L. Reconfigurable radio remote unit for distributed antenna systems
IT201600131387A1 (it) * 2016-12-27 2018-06-27 Teko Telecom S R L Unita’ radio remota riconfigurabile per sistemi distribuiti d’antenna
US11818809B2 (en) 2016-12-27 2023-11-14 Teko Telecom S.R.L. Reconfigurable radio remote unit for distributed antenna systems
EP4236616A3 (en) * 2017-04-27 2023-12-13 Mitsubishi Electric Corporation Communication system
US11871268B2 (en) 2017-04-27 2024-01-09 Mitsubishi Electric Corporation Communication system
CN111491391A (zh) * 2020-04-09 2020-08-04 京信通信系统(中国)有限公司 小区调度方法、电子设备、存储介质及分布式天线系统

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