WO2011082586A1 - 一种基站节能方法及系统 - Google Patents

一种基站节能方法及系统 Download PDF

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Publication number
WO2011082586A1
WO2011082586A1 PCT/CN2010/076338 CN2010076338W WO2011082586A1 WO 2011082586 A1 WO2011082586 A1 WO 2011082586A1 CN 2010076338 W CN2010076338 W CN 2010076338W WO 2011082586 A1 WO2011082586 A1 WO 2011082586A1
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WO
WIPO (PCT)
Prior art keywords
base station
mimo cell
cell
mimo
cfn
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Ceased
Application number
PCT/CN2010/076338
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English (en)
French (fr)
Inventor
林树功
刘俊强
耿云亮
陈冬雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
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ZTE Corp
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Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to BR112012007121-1A priority Critical patent/BR112012007121A2/pt
Priority to EP10841929.2A priority patent/EP2472961B1/en
Priority to US13/498,971 priority patent/US8838177B2/en
Priority to JP2012531220A priority patent/JP2013506356A/ja
Publication of WO2011082586A1 publication Critical patent/WO2011082586A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • H04B7/0693—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas switching off a diversity branch, e.g. to save power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a wireless communication system, and in particular, to a base station energy saving method and system. Background technique
  • UMT S Universal Mobile Telecommunications System
  • CN Core Network
  • UTRAN which controls air interface access
  • UMTS Terrestrial Radio Access Network Universal Terrestrial Radio Access Network
  • the UTRAN includes two network elements, a RNC (Radio Network Controller) and a NodeB (base station), wherein the base station further includes a baseband processing unit (BBU) and a radio frequency processing unit (RU).
  • RNC Radio Network Controller
  • BBU baseband processing unit
  • RU radio frequency processing unit
  • the main functions of the BBU are the baseband processing function for completing the Uu interface (channel coding, multiplexing, modulation, and spreading for air transmission, etc.), Iub interface function with the radio network controller (RNC), signaling processing, local and remote. Operation and maintenance functions, as well as the status monitoring and alarm information reporting of the base station system.
  • the main functions of RU include the following modules:
  • IF module Complete the function of modulation and demodulation, digital up-conversion and A/D conversion of optical transmission
  • Transceiver module Complete the conversion function of IF signal to RF signal
  • Amplifier Complete signal enhancement
  • Filter module Complete signal filtering function.
  • an RNC generally includes multiple NodeBs, and a NodeB generally includes a baseband processing unit (BBU) and multiple radio processing units (RUs), so if the power consumption of the radio processing unit is saved, The amplitude saves power consumption throughout the UTRAN.
  • BBU baseband processing unit
  • RUs radio processing units
  • High Speed Downlink Packet Access is a technology proposed by the 3rd Generation Partnership Project (3GPP) in Release 5 (Release-5) to improve downlink (network to terminal) network data. Throughput, its designed cell and single-user downlink peak rate can reach 14.4 Mbps. Subsequently, in order to make the downlink peak rate higher, new HSPA+ technologies were introduced, including DL 64QAM high-order modulation and multiple-input multiple-output (MIMO) antenna technology proposed in Release-7, and multi-carrier proposed in Release-8. (DC) HSDPA technology, and DC HSDPA+MIMO technology proposed in Release-9.
  • MIMO utilizes multiple antennas to suppress channel fading, which improves radio channel capacity and spectrum utilization without increasing bandwidth.
  • the cell and single-user peak rate is 28.8 Mbps in the case of MIMO+16QAM, and 43.2 Mbps in the case of MIMO+64QAM.
  • the transmitting end needs to modulate data to two unrelated antennas for simultaneous transmission, and the receiving side also needs to simultaneously receive data from two different antennas and perform demodulation.
  • 3GPP TS 25.214 gives the technical schematic diagram of MIMO as shown in Figure 2.
  • One antenna transmits the P-CPICH channel in the modulation mode of the Ante dish al, and the other antenna transmits the P-CPICH channel in the modulation mode of Antenna2, that is, the dominant frequency-dominant frequency mode;
  • the two antennas transmit the P-CPICH and S-CPICH channels, respectively, in the Antennal modulation mode, which is the pilot-tuning frequency mode.
  • MIMO requires two sets of radio processing units (RUs), each of which processes data on one antenna.
  • the MIMO cell with the dominant frequency-dominant frequency scheme is configured, and the common channel transmission power of each corresponding RU configuration is half of the non-MIMO cell, so the total common channel transmission power of the two RUs and the non-MIMO cell
  • the transmit power of the pilot frequency configuration is the same as that of the non-MIMO.
  • the transmit power of the pilot frequency can be configured according to the actual situation, and the transmit power of each common channel in each RU is non- Half of the MIMO cell, so the total common channel transmit power of the two RUs will be higher than the power of the multi-tuned frequency configuration of the non-MIMO cell.
  • the power consumption of the RU is related to the transmit power and its power amplifier efficiency, the lower the power amplifier efficiency, the greater the power consumption under the same transmit power.
  • the efficiency of the power amplifier of the RU is related to its output power. The same RU, the higher the output power, the higher the efficiency of the power amplifier. Therefore, in the MIMO cell of the pilot-dominant frequency mode, although the total transmit power is the same as that of the non-MIMO cell, since the RU transmit power of each MIMO cell is only half of that of the non-MIMO cell RU, the power amplifier efficiency is not
  • the RU of a MIMO cell is high, resulting in a higher total power consumption than that of a non-MIMO cell. For the MIMO cell with the dominant frequency-adjustment frequency mode, the total transmission power is higher than that of the non-MIMO, so the total power consumption is obviously higher than that of the non-MIMO cell.
  • a cell is either fixedly configured for MIMO mode or fixedly configured for non-MIMO mode.
  • the advantage of the cell configured as MIMO mode is to improve the user data throughput rate, but whether the terminal user in the MIMO cell can adopt the MIMO dual-stream mode scheduling is related to the terminal capability, the amount of end user data, and the CQI of the terminal user, if the terminal user is not satisfied.
  • the cell still uses the MIMO mode to transmit, which wastes the power consumption of the RU.
  • a cell configured as a non-MIMO mode may consume less RU power than a MIMO cell, but MIMO terminal users cannot experience the high-speed data throughput of MIMO.
  • the technical problem to be solved by the present invention is to provide a method and system for saving energy of a base station, which can not only satisfy the experience of the MIMO user, but also appropriately save the energy consumption of the base station at an appropriate time.
  • the present invention provides a base station energy saving method, including: when a first condition is met, a base station enters a power saving mode, and at least one multiple input multiple output (MIMO) cell reconfiguration of the base station is a non-MIMO cell ;
  • MIMO multiple input multiple output
  • the base station When the second condition is met, the base station enters a normal mode, and at least one non-MIMO cell of the base station is reconfigured as a MIMO cell.
  • the first condition includes: the user data amount of the MIMO cell is less than a preset MIMO cell reconfiguration to the non-MIMO cell user data volume threshold for a period of time, and/or the system preset MIMO cell reconfiguration to the non-MIMO cell Time point.
  • the second condition includes: the user data amount of the non-MIMO cell is greater than the preset non-MIMO cell recovery to the MIMO cell user data volume threshold for a period of time, and/or the system preset non-MIMO cell recovery time to the MIMO cell point.
  • the step of reconfiguring the at least one MIMO cell of the base station as a non-MIMO cell comprises: sending, by the base station controller, a reconfiguration message with a connection frame number (CFN) to the base station, requesting the base station to MIMO cell reconfiguration is a non-MIMO cell;
  • CFN connection frame number
  • the base station After receiving the reconfiguration message, the base station reconfigures the designated cell as a non-MIMO cell and turns off one of the transmitting antennas in the designated CFN.
  • the method further includes: before the MIMO cell is reconfigured as a non-MIMO cell, the base station controller notifies the user equipment (UE) of the CFN by using a System Information Block (SIB) message with a CFN or a reconfiguration message or a custom message.
  • SIB System Information Block
  • the MIMO cell will be reconfigured as a non-MIMO cell.
  • the step of reconfiguring the at least one non-MIMO cell of the base station as the MIMO cell comprises: the base station controller transmitting a reconfiguration message with the CFN to the base station, requesting the base station to reconfigure the non-MIMO cell as the MIMO cell;
  • the base station After receiving the reconfiguration message, the base station reconfigures the designated cell as a MIMO cell and opens a closed transmit antenna at the designated CFN.
  • the method further includes: before the non-MIMO cell is reconfigured as a MIMO cell, the base station controller notifies the UE that the non-MIMO cell will be reconfigured as a MIMO cell at the CFN by using an SIB message with a CFN or a reconfiguration message or a custom message. .
  • Reconfiguring the at least one MIMO cell of the base station as a non-MIMO cell includes: the base station actively sends a message to the base station controller to instruct the base station controller to reconfigure the MIMO cell as a non-MIMO cell, or the base station controller actively reconfigures the MIMO cell as Non-MIMO cell;
  • Reconfiguring the at least one non-MIMO cell of the base station as a MIMO cell includes: the base station actively sends a message to the base station controller to indicate that the base station controller reconfigures the non-MIMO cell into a MIMO cell, or the base station controller actively reconfigures the non-MIMO cell It is a MIMO cell.
  • a base station energy saving system comprising:
  • a base station configured to: when the first condition is met, enter a power saving mode, reconfigure at least one multiple input multiple output (MIMO) cell of the base station as a non-MIMO cell; when the second condition is met, enter a normal mode, At least one non-MIMO cell of the base station is reconfigured as a MIMO cell.
  • MIMO multiple input multiple output
  • the first condition includes that the amount of user data of the MIMO cell is less than a preset period for a continuous period of time.
  • the MIMO cell is reconfigured to the non-MIMO cell user data threshold, and/or, the system preset MIMO cell is reconfigured to the non-MIMO cell.
  • the second condition includes that the amount of user data of the non-MIMO cell is greater than a preset period for a continuous period of time.
  • the non-MIMO cell is restored to the MIMO cell user data threshold, and/or the system preset non-MIMO cell is restored to the MIMO cell.
  • the system further includes a base station controller configured to: send a reconfiguration message with a connection frame number (CFN) to the base station, requesting the base station to reconfigure the MIMO cell as a non-MIMO cell;
  • a base station controller configured to: send a reconfiguration message with a connection frame number (CFN) to the base station, requesting the base station to reconfigure the MIMO cell as a non-MIMO cell;
  • CFN connection frame number
  • the base station is configured to reconfigure at least one MIMO cell of the base station to be non-
  • the designated cell After receiving the reconfiguration message, the designated cell is reconfigured as a non-MIMO cell and the one transmitting antenna is turned off at the designated CFN.
  • the base station controller is further configured to: notify the user equipment (UE) to reconfigure the MIMO cell as a non-MIMO cell when the MIMO cell is reconfigured as a non-MIMO cell by using an SIB message or a reconfiguration message with a CFN. .
  • UE user equipment
  • the system further includes a base station controller configured to: send a reconfiguration message with a CFN to the base station, and instruct the base station to reconfigure the non-MIMO cell as a MIMO cell;
  • the base station is configured to reconfigure the at least one non-MIMO cell of the base station into a MIMO cell in the following manner: after receiving the reconfiguration message, reconfigure the designated cell into a MIMO cell and open the closed all the way in the designated CFN. Transmitting antenna.
  • the base station controller is further configured to: notify the UE to reconfigure the non-MIMO cell to be a MIMO cell at the CFN by using a SIB message with a CFN or a reconfiguration message before the non-MIMO cell is reconfigured as a MIMO cell.
  • a base station energy-saving system includes a base station controller, where the base station controller is configured to: when the first condition is met, the receiving the base station sends an indication message to reconfigure the MIMO cell to be non-
  • the indication message sent by the receiving base station reconfigures the non-MIMO cell into a MIMO cell;
  • the MIMO cell When the first condition is met, the MIMO cell is actively reconfigured as a non-MIMO cell; when the second condition is met, the non-MIMO cell is actively reconfigured as a MIMO cell.
  • the base station energy-saving method and system provided in this paper can dynamically configure the cell mode, which can ensure the experience of the MIMO terminal, and can save the energy consumption of the base station even when the amount of user data is small.
  • Figure 1 is an architectural diagram of UTRAN
  • FIG. 2 is a technical schematic diagram of MIMO
  • FIG. 3 is a flow chart of the implementation of the present invention. Preferred embodiment of the invention
  • the base station energy saving method provided by the present invention is used in a wireless system supporting MIMO, when the first condition is met, the base station enters a power saving mode; when the second condition is met, the base station returns to the normal mode.
  • At least one MIMO cell of the base station is reconfigured as a non-MIMO cell.
  • At least one non-MIMO cell of the base station is reconfigured as a MIMO cell.
  • the first condition includes that the amount of user data of the MIMO cell is less than a preset MIMO cell reconfiguration to a non-MIMO cell user data threshold for a period of time; and/or the MIMO cell preset MIMO cell reconfiguration to the non-MIMO cell. Time point.
  • the first condition can also be defined as needed, which is not limited by the present invention.
  • the second condition includes that the amount of user data of the non-MIMO cell is greater than the preset non-MIMO cell recovery to the MIMO cell user data threshold for a period of time, and/or the time that the UTRAN system presets the non-MIMO cell to recover to the MIMO cell. point.
  • the second condition can also be defined as needed, which is not limited by the present invention.
  • Whether the first condition or the second condition is satisfied can be monitored by the base station and/or the base station controller, or other network device.
  • the base station enters the power-saving mode by the base station actively initiating the request to the base station controller; or, the base station entering the power-saving mode is actively determined by the base station controller. That is, when the first condition is met, the base station sends a message to the base station controller to instruct the base station controller to reconfigure the MIMO cell as a non-MIMO cell, or the base station controller actively reconfigures the MIMO cell as a non-MIMO cell.
  • the base station enters the normal mode by the base station actively initiating a request to the base station controller, or the base station entry mode is actively determined by the base station controller. That is to meet the second In the condition, the base station actively sends a message to the base station controller to indicate that the base station controller reconfigures the non-MIMO cell as the MIMO cell, or the base station controller actively reconfigures the non-MIMO cell into the MIMO cell.
  • the base station controller may notify the UE that the MIMO cell will be reconfigured as the CFN through the SIB message with the CFN (Connection Frame Number).
  • the non-MIMO cell at the same time, the UE may be notified by the reconfiguration message with the CFN that the MIMO cell will be reconfigured as a non-MIMO cell when the CFN is used.
  • the base station controller may notify the UE that the non-MIMO cell will be reconfigured as a MIMO cell at the CFN through the SIB message with the CFN;
  • the re-matching message with the CFN may also be used to inform the UE that the non-MIMO cell will be reconfigured as a MIMO cell at the CFN.
  • the reconfiguration message after receiving the reconfiguration message with the CFN sent by the RNC, the reconfiguration message requests the base station to reconfigure the MIMO cell into a non-MIMO cell, and reconfigures the designated cell into a non-MIMO cell in the designated CFN. And the one-way transmit antenna is turned off, and the RCC is returned with the cell reconfiguration success message, and then enters the energy-saving mode.
  • the reconfiguration message after receiving the reconfiguration message with the CFN sent by the RNC, the reconfiguration message requests the base station to reconfigure the non-MIMO cell into a MIMO cell, and reconfigures the designated cell into a MIMO cell in the designated CFN.
  • the closed transmit antenna is turned on, and the RNC is returned with the cell reconfiguration success message, and then enters the normal mode.
  • the implementation process of the present invention includes: Step 301: The UTRAN system presets a time point at which the MIMO cell is reconfigured to the non-MIMO cell and the MIMO cell reconfigures to the non-MIMO cell.
  • User data volume threshold if the reconfiguration time point is reached or the user data volume of the MIMO cell is continuous for a period of time (the time period can be set according to the actual situation of the operator) is lower than the preset threshold, in order to save the energy consumption of the base station
  • the base station will actively send a message to the RNC to indicate that the RNC is ready to reconfigure the cell to the non-MIMO mode, or the RNC actively prepares to reconfigure the cell to the non-MIMO mode;
  • Step 302 Before the RNC reconfigures the MIMO cell to the non-MIMO cell, in order to maintain The synchronization between the base station and the UE, the RNC may first notify the UE that the MIMO cell will be reconfigured as a non-MIMO cell in the specified CFN through the SIB message with the CFN; the RNC may also notify the UE that the MIMO cell will be specified through a reconfiguration message or other message.
  • the CFN is reconfigured as a non-MIMO cell.
  • the RNC sends a cell reconfiguration message (or other message or a newly defined message to the base station, which is not limited by the present invention), and notifies the base station to reconfigure the MIMO cell into a non-MIMO cell in the designated CFN.
  • Step 303 After receiving the cell reconfiguration message, the base station closes one transmitting antenna in the designated CFN, and returns a cell reconfiguration success response to the RNC, and then the original MIMO cell becomes a non-MIMO cell, and enters a power saving mode.
  • the UTRAN system After the cell is reconfigured to the non-MIMO mode, the UTRAN system automatically restores to the MIMO mode according to the preset second condition.
  • the specific process is as follows.
  • Step 304 The UTRAN system presets a time point at which the non-MIMO cell recovers to the MIMO cell and a user data volume threshold that the non-MIMO cell recovers to the MIMO cell. If the recovery time is up or the user data of the non-MIMO cell is continuous for a period of time (the time can be set according to the actual situation of the operator), the base station will take the initiative to meet the MIMO user experience. A message is sent to the RNC indicating that the RNC is ready to reconfigure the cell to MIMO mode, or the RNC is actively preparing to reconfigure the cell to the MIMO mode.
  • Step 305 Before the RNC reconfigures the non-MIMO cell to the MIMO cell, in order to maintain synchronization between the base station and the UE, the RNC may first notify the UE that the non-MIMO cell will be reconfigured as a MIMO cell in the specified CFN by using an SIB message with a CFN. The RNC may also inform the UE of the non-MIMO' by the reconfiguration message that the zone will be reconfigured as a MIMO cell at the designated CFN. At the same time, the RNC sends a 'J, zone reconfiguration message to the base station, and informs the base station to reconfigure the non-MIMO cell as a MIMO cell in the designated CFN.
  • Step 306 After receiving the cell reconfiguration message, the base station resumes the one-way transmitting antenna in the designated CFN, and returns the cell re-successful response to the RNC, and then returns to the original MIMO cell mode to enter the normal working mode.
  • the base station energy saving system of the present invention includes:
  • a base station configured to enter a power saving mode when the first condition is met, where at least one multiple input multiple output (MIMO) cell reconfiguration of the base station is a non-MIMO cell; when the second condition is met, enter a positive In the normal mode, at least one non-MIMO cell of the base station is reconfigured as a MIMO cell.
  • MIMO multiple input multiple output
  • the first condition includes that the amount of user data of the MIMO cell is less than a preset MIMO cell reconfiguration to a non-MIMO cell user data threshold for a period of time, and/or a time point at which the system preset MIMO cell is reconfigured to the non-MIMO cell.
  • the second condition includes that the amount of user data of the non-MIMO cell is greater than the preset non-period for a period of time.
  • the MIMO cell is restored to the MIMO cell user data threshold, and/or the system preset non-MIMO cell is restored to the MIMO cell.
  • the system further includes a base station controller, configured to send a reconfiguration message with a CFN to the base station, and request the base station to reconfigure the MIMO cell as a non-MIMO cell;
  • the base station is further configured to: after receiving the reconfiguration message, reconfigure the designated cell to be non-specified in the designated CFN.
  • the MIMO cell is closed with one transmit antenna.
  • the base station controller is further configured to notify the UE that the MIMO cell will be reconfigured as a non-MIMO cell when the CFN is addressed by the SIB message or the reconfiguration message with the CFN before the MIMO cell is reconfigured as the non-MIMO cell.
  • the system further includes a base station controller, configured to send a reconfiguration message with a CFN to the base station, instructing the base station to reconfigure the non-MIMO cell as a MIMO cell;
  • the base station is further configured to: after receiving the reconfiguration message, reconfigure the designated cell into a MIMO cell and open a closed transmit antenna at the designated CFN.
  • the base station controller is further configured to notify the UE that the non-MIMO cell will be reconfigured as a MIMO cell at the CFN by using a SIB message with a CFN or a reconfiguration message before the non-MIMO cell is reconfigured as a MIMO cell.
  • a base station energy-saving system comprising: a base station controller, where the base station controller is configured to: when the first condition is met, the indication message sent by the receiving base station reconfigures the MIMO cell into a non-MIMO cell; when the second condition is met, Receiving an indication message sent by the base station to reconfigure the non-MIMO cell as a MIMO cell; or
  • the MIMO cell When the first condition is met, the MIMO cell is actively reconfigured as a non-MIMO cell; when the second condition is met, the non-MIMO cell is actively reconfigured as a MIMO cell.
  • the base station controller is an RNC.
  • the present invention is applicable to other MIMO systems in addition to the UMTS system, which is not limited by the present invention.
  • the base station energy saving method and system provided in this paper can dynamically configure the cell mode, which can not only ensure the experience of the MIMO terminal, but also save the power consumption of the base station when the amount of user data is small.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明公开了一种基站节能方法和系统，所述方法包括：在满足第一条件时，基站进入节能模式，所述基站的至少一个多输入多输出（MIMO）小区重配为非MIMO小区；在满足第二条件时，基站进入正常模式，所述基站的至少一个非MIMO小区重配为MIMO小区。本发明可以动态配置小区模式，这样既能保证MIMO终端的体验度，同时在用户数据量不大的情况下又能节约基站的能耗。

Description

一种基站节能方法及系统
技术领域
本发明涉及无线通信系统， 具体涉及一种基站节能方法及系统。 背景技术
目前， 电信行业的利润正在逐步减少， 电信运营商在通过扩大市场份额 和业务种类来实现增收的同时， 也越来越注意运营成本（OPEX )的节省， 而 设备能耗则是 OPEX的一个重要部分。
UMT S ( Universal Mobile Telecommunications System，通用移动通信系统) 可以分为几个主要组件： 负责建立和控制用户会话的一个或多个 CN ( Core Network, 核心网） ， 以及控制空中接口接入的 UTRAN ( UMTS Terrestrial Radio Access Network, 通用陆地无线接入网） 。 UTRAN包括 RNC ( Radio Network Controller, 无线网络控制器） 和 NodeB (基站） 两个网元， 其中基 站又包含基带处理单元（BBU ) 和射频处理单元（RU ) 。 UTRAN的体系结 构如图 1所示。 BBU的主要功能有完成 Uu接口的基带处理功能 （适合空中 传输的信道编码、 复用、 调制和扩频等） 、 与无线网絡控制器（RNC )的 Iub 接口功能、 信令处理、 本地和远程操作维护功能， 以及基站系统的工作状态 监控和告警信息上报功能。 RU的主要功能包括以下几个模块：
中频模块： 完成光传输的调制解调、 数字上下变频、 A/D转换的功能； 收发信机模块： 完成中频信号到射频信号的变换功能；
功放： 完成信号的增强功能；
滤波模块： 完成信号的过滤功能。
从图 1可知， 一个 RNC—般包含多个 NodeB, 而一个 NodeB—般包含 一个基带处理单元（BBU )和多个射频处理单元（RU ) , 因此如果能节约射 频处理单元的功耗则会大幅度的节约整个 UTRAN的功耗。
高速下行链路分组接入 (HSDPA)是第三代合作伙伴计划 (3GPP)在版本 5 (Release-5)中提出的一种技术， 用于提高下行方向（网络到终端）的网络数据 吞吐量， 其设计的小区和单用户下行峰值速率可以达到 14.4 Mbps。 随后， 为 了使得下行峰值速率更高， 引入了 HSPA+新技术， 这些技术包括在 Release-7 提出的 DL 64QAM 高阶调制和多输入多输出（MIMO)天线技术， 以及在 Release-8提出的多载波（DC ) HSDPA技术， 以及在 Release-9提出的 DC HSDPA+MIMO技术。
MIMO利用多天线抑制信道衰落， 可以在不增加带宽的情况下提高无线 信道容量和频谱利用率。 引入 MIMO后， 在 MIMO+16QAM情况下小区和单 用户峰值速率为 28.8Mbps, 在 MIMO+64QAM情况下能达到 43.2Mbps。 但 为了支持 MIMO技术， 发送端需要将数据调制到两根不相干的天线上同时发 送， 接收方也需要从两根不相千的天线上同时接收数据， 并进行解调。 3GPP TS 25.214给出了 MIMO的技术原理图如图 2所示。
MIMO在两根天线上的导频配置方式有两种：
一根天线以 Ante皿 al 的调制模式发送 P-CPICH信道， 另一根天线以 Antenna2的调制模式发射 P-CPICH信道， 也就是主导频-主导频模式；
两根天线用 Antennal的调制模式分别发送 P-CPICH和 S-CPICH信道， 也就是主导频-辅导频模式。
从图 2可知， MIMO需两套射频处理单元（RU ) , 每套各处理一根天线 上的数据。 在覆盖相同的情况下， 配置主导频-主导频方式的 MIMO小区， 对 应的每个 RU配置的公共信道发射功率为非 MIMO小区的一半，因此两个 RU 总的公共信道发射功率与非 MIMO 小区的一样； 对配置主导频 -辅导频方式 MIMO小区， 主导频配置的发射功率与非 MIMO的一样， 辅导频的发射功率 可根据实际情况配置， 其它公共信道在每个 RU的发射功率都为非 MIMO小 区的一半， 因此两个 RU总的公共信道发射功率会比非 MIMO小区的多辅导 频配置的功率。
同时， 由于 RU的功耗与发射功率及其功放效率相关， 相同发射功率下， 功放效率越低的， 功耗越大。 而 RU的功放效率与其输出功率相关， 同一个 RU, 输出功率越高功放效率也越高。 因此， 在主导频-主导频方式的 MIMO 小区下， 虽然总的发射功率跟非 MIMO小区的一样，但是因为每个 MIMO小 区的 RU发射功率只有非 MIMO 小区 RU的一半， 所以其功放效率没有非 MIMO小区的 RU高， 导致其总的功耗会比非 MIMO小区的高。 而对主导频 -辅导频方式的 MIMO小区， 其总的发射功率就比非 MIMO的高， 因此其总 的功耗显然会比非 MIMO小区的高。
目前， 在 UMTS系统中， 小区要么固定配置为 MIMO模式， 要么固定配 置为非 MIMO模式。 配置为 MIMO模式的小区优势是提高用户数据吞吐率， 但是在 MIMO小区的终端用户能否采用 MIMO双流方式调度跟终端能力、终 端用户数据量大小及终端用户的 CQI有关，如果在终端用户不满足 MIMO双 流方式的情况下小区仍采用 MIMO模式发射则会浪费 RU的功耗。 配置为非 MIMO模式的小区其 RU的功耗会比 MIMO小区的小些，但是 MIMO终端用 户没法体验到 MIMO的高速数据吞吐率。
发明内容
本发明要解决的技术问题是提供一种基站的节能方法及系统 , 既能满足 MIMO用户的体验度， 又能适时适当的节约基站的能耗。
为了解决上述问题， 本发明提供了一种基站节能方法， 其包括： 在满足第一条件时， 基站进入节能模式， 所述基站的至少一个多输入多 输出 （MIMO ) 小区重配为非 MIMO小区；
在满足第二条件时， 基站进入正常模式， 所述基站的至少一个非 MIMO 小区重配为 MIMO小区。
所述第一条件包括： MIMO小区的用户数据量连续一段时间小于预设的 MIMO小区重配到非 MIMO小区用户数据量门限，和 /或 , 系统预设的 MIMO 小区重配到非 MIMO小区的时间点。
所述第二条件包括： 非 MIMO小区的用户数据量连续一段时间大于预设 的非 MIMO小区恢复到 MIMO小区用户数据量门限， 和 /或， 系统预设的非 MIMO小区恢复到 MIMO小区的时间点。
所述基站的至少一个 MIMO小区重配为非 MIMO小区的步骤包括： 基站控制器下发带连接帧号 （CFN ) 的重配消息给基站， 请求基站将 MIMO小区重配为非 MIMO小区；
基站接收该重配消息后， 在指定的 CFN将指定小区重配为非 MIMO小 区并关闭一路发射天线。
所述方法还包括： 在 MIMO小区重配为非 MIMO小区之前，基站控制器 通过带 CFN的系统信息块（ SIB ) 消息或重配消息或自定义消息通知用户设 备（ UE )在该 CFN时该 MIMO小区将重配为非 MIMO小区。
所述将基站的至少一个非 MIMO小区重配为 MIMO小区的步骤包括： 基站控制器发送带 CFN的重配消息给基站， 请求基站将非 MIMO小区 重配为 MIMO小区；
基站收到该重配消息后， 在指定的 CFN将指定小区重配为 MIMO小区 并打开被关闭的一路发射天线。
所述方法还包括： 在非 MIMO小区重配为 MIMO小区之前，基站控制器 通过带 CFN的 SIB消息或重配消息或自定义消息通知 UE在该 CFN时该非 MIMO小区将重配为 MIMO小区。
所述基站的至少一个 MIMO小区重配为非 MIMO小区包括：基站主动给 基站控制器发消息指示基站控制器将 MIMO小区重配为非 MIMO小区，或者， 基站控制器主动将 MIMO小区重配为非 MIMO小区；
所述基站的至少一个非 MIMO小区重配为 MIMO小区包括：基站主动给 基站控制器发消息指示基站控制器将非 MIMO小区重配为 MIMO小区 ,或者 , 基站控制器主动将非 MIMO小区重配为 MIMO小区。
一种基站节能系统， 其包括：
基站， 其设置为： 在满足第一条件时， 进入节能模式， 将该基站的至少 一个多输入多输出（MIMO )小区重配为非 MIMO小区； 在满足第二条件时， 进入正常模式， 将该基站的至少一个非 MIMO小区重配为 MIMO小区。
所述第一条件包括 MIMO 小区的用户数据量连续一段时间小于预设的
MIMO小区重配到非 MIMO小区用户数据量门限，和 /或， 系统预设的 MIMO 小区重配到非 MIMO小区的时间点。
所述第二条件包括非 MIMO小区的用户数据量连续一段时间大于预设的 非 MIMO 小区恢复到 MIMO 小区用户数据量门限， 和 /或， 系统预设的非 MIMO小区恢复到 MIMO小区的时间点。
所述系统还包括基站控制器， 其设置为： 发送带连接帧号 （CFN ) 的重 配消息给基站， 请求基站将 MIMO小区重配为非 MIMO小区；
所述基站是设置为以如下方式将该基站的至少一个 MIMO小区重配为非
MIMO小区： 收到该重配消息后， 在指定的 CFN将指定小区重配为非 MIMO 小区并关闭一路发射天线。
所述基站控制器还设置为： 在 MIMO小区重配为非 MIMO小区之前，通 过带 CFN的 SIB消息或重配消息通知用户设备（ UE )在该 CFN时该 MIMO 小区将重配为非 MIMO小区。
所述系统还包括基站控制器，其设置为：发送带 CFN的重配消息给基站， 指示基站将非 MIMO小区重配为 MIMO小区；
所述基站是设置为以如下方式将该基站的至少一个非 MIMO小区重配为 MIMO小区： 收到该重配消息后， 在指定的 CFN将指定小区重配为 MIMO 小区并打开被关闭的一路发射天线。
所述基站控制器还设置为： 在非 MIMO小区重配为 MIMO小区之前，通 过带 CFN的 SIB消息或重配消息通知 UE在该 CFN时该非 MIMO小区将重 配为 MIMO小区。
一种基站节能系统， 其包括基站控制器， 所述基站控制器设置为： 在满足第一条件时， 接收基站发送的指示消息将 MIMO 小区重配为非
MIMO小区； 在满足第二条件时， 接收基站发送的指示消息将非 MIMO小区 重配为 MIMO小区； 或者
在满足第一条件时，主动将 MIMO小区重配为非 MIMO小区； 在满足第 二条件时， 主动将非 MIMO小区重配为 MIMO小区。
本文提供的基站节能方法和系统， 可以动态配置小区模式， 这样既能保 证 MIMO终端的体验度， 同时在用户数据量不大的情况下又能节约基站的能 耗。 附图概述
图 1是 UTRAN的体系结构图；
图 2是 MIMO的技术原理图；
图 3是本发明实施流程图。 本发明的较佳实施方式
本发明提供的基站节能方法， 用于支持 MIMO的无线系统中， 在满足第 一条件时， 基站进入节能模式； 满足第二条件时， 基站恢复正常模式。
上述方法中， 基站进入节能模式时， 所述基站的至少一个 MIMO小区重 配为非 MIMO小区。
上述方法中， 基站恢复正常模式时， 所述该基站的至少一个非 MIMO小 区重配为 MIMO小区。
其中， 所述第一条件包括 MIMO小区的用户数据量连续一段时间小于预 设的 MIMO小区重配到非 MIMO小区用户数据量门限； 和 /或 UTRAN系统 预设的 MIMO小区重配到非 MIMO小区的时间点。第一条件也可根据需要进 行定义， 本发明对此不作限定。
所述第二条件包括非 MIMO小区的用户数据量连续一段时间大于预设的 非 MIMO小区恢复到 MIMO小区用户数据量门限， 和 /或， UTRAN系统预设 的非 MIMO小区恢复到 MIMO小区的时间点。第二条件也可根据需要进行定 义， 本发明对此不作限定。
可由基站和 /或基站控制器， 或其他网络设备监测是否满足第一条件或第 二条件。
上述方法中， 基站进入节能模式是由基站向基站控制器主动发起请求完 成的； 或者， 基站进入节能模式是由基站控制器主动确定完成的。 即在满足 第一条件时， 基站给基站控制器发消息指示基站控制器将 MIMO小区重配为 非 MIMO小区， 或者， 基站控制器主动将 MIMO小区重配为非 MIMO小区。
上述方法中， 基站进入正常模式是由基站向基站控制器主动发起请求完 成的， 或者， 基站进入模式是由基站控制器主动确定完成的。 即在满足第二 条件时， 基站主动给基站控制器发消息指示基站控制器将非 MIMO小区重配 为 MIMO小区， 或者， 基站控制器主动将非 MIMO小区重配为 MIMO小区。
上述方法中，在 MIMO小区重配为非 MIMO小区之前，为了使得基站和 UE同步， 基站控制器可以通过带 CFN (连接帧号）的 SIB消息通知 UE在该 CFN时该 MIMO小区将重配为非 MIMO小区； 同时， 也可以通过带 CFN的 重配消息通知 UE在该 CFN时该 MIMO小区将重配为非 MIMO小区。
上述方法中，在非 MIMO小区恢复到 MIMO小区之前，为了使得基站和 UE同步， 基站控制器可以通过带 CFN的 SIB消息通知 UE在该 CFN时该非 MIMO小区将重配为 MIMO小区； 同时， 也可以通过带 CFN的重配消息通 知 UE在该 CFN时该非 MIMO小区将重配为 MIMO小区。
上述方法中， 基站在收到 RNC下发的带 CFN的重配消息后， 该重配消 息请求基站将 MIMO小区重配为非 MIMO小区 , 会在指定的 CFN将指定小 区重配为非 MIMO小区并关闭一路发射天线， 同时给 RNC回复小区重配成 功消息， 之后进入节能模式。
上述方法中， 基站在收到 RNC下发的带 CFN的重配消息后， 该重配消 息请求基站将非 MIMO小区重配为 MIMO小区 , 会在指定的 CFN将指定小 区重配为 MIMO小区并打开被关闭的一路发射天线， 同时给 RNC回复小区 重配成功消息， 之后进入正常模式。
下面结合附图进一步的说明本发明的实现。
如图 3所示， 对配置为 MIMO模式的小区， 本发明的实现流程包括： 步骤 301： UTRAN系统预设了 MIMO小区重配到非 MIMO小区的时间 点及 MIMO小区重配到非 MIMO小区的用户数据量门限，如果重配时间点到 了或 MIMO小区的用户数据量连续一段时间（这里的一段时间可根据运营商 的实际情况进行设置 )低于预设的门限， 则为了节约基站的能耗， 基站会主 动给 RNC发消息指示 RNC准备将该小区重配到非 MIMO模式， 或者 RNC 主动准备将该小区重配到非 MIMO模式；
步骤 302: 在 RNC将 MIMO小区重配到非 MIMO小区之前， 为了保持 基站和 UE的同步， RNC可先通过带 CFN的 SIB消息通知 UE该 MIMO小区 将在指定的 CFN重配为非 MIMO小区； RNC也可通过重配消息或其他消息 通知 UE该 MIMO小区将在指定的 CFN重配为非 MIMO小区。 同时 RNC给 基站发小区重配消息（或其他消息或新定义的消息， 本发明对此不作限定）， 通知基站在指定 CFN将 MIMO小区重配为非 MIMO小区。
步骤 303： 基站收到小区重配消息后， 在指定 CFN关闭一路发射天线， 同时给 RNC回复小区重配成功响应， 此后原先的 MIMO小区变为非 MIMO 小区， 进入节能模式。
在小区重配为非 MIMO模式后， UTRAN系统会根据预设的第二条件自 动恢复到 MIMO模式， 具体流程如下。
步骤 304: UTRAN系统预设了非 MIMO小区恢复到 MIMO小区的时间 点及非 MIMO小区恢复到 MIMO小区的用户数据量门限。如果恢复时间点到 了或非 MIMO小区的用户数据量连续一段时间（这里的一段时间可根据运营 商的实际情况进行设置）高于预设的门限，则为了满足 MIMO用户的体验度， 基站会主动给 RNC发消息指示 RNC准备将该小区重配到 MIMO模式，或者 RNC主动准备将该小区重配到 MIMO模式。
步骤 305: 在 RNC将非 MIMO小区重配到 MIMO小区之前， 为了保持 基站和 UE的同步， RNC可先通过带 CFN的 SIB消息通知 UE该非 MIMO 小区将在指定的 CFN重配为 MIMO小区； RNC也可通过重配消息通知 UE 该非 MIMO '〗、区将在指定的 CFN重配为 MIMO小区。同时 RNC给基站发 'J、 区重配消息， 通知基站在指定 CFN将非 MIMO小区重配为 MIMO小区。
步骤 306: 基站收到小区重配消息后， 在指定 CFN恢复被关闭一路发射 天线， 同时给 RNC回复小区重配成功响应， 此后恢复到原先的 MIMO小区 模式， 进入正常工作模式。
本发明的基站节能系统， 包括：
基站， 用于在满足第一条件时， 进入节能模式， 该基站的至少一个多输 入多输出 （MIMO ) 小区重配为非 MIMO小区； 在满足第二条件时， 进入正 常模式， 该基站的至少一个非 MIMO小区重配为 MIMO小区。
第一条件包括 MIMO小区的用户数据量连续一段时间小于预设的 MIMO 小区重配到非 MIMO小区用户数据量门限， 和 /或 , 系统预设的 MIMO小区 重配到非 MIMO小区的时间点。
第二条件包括非 MIMO 小区的用户数据量连续一段时间大于预设的非
MIMO小区恢复到 MIMO小区用户数据量门限，和 /或， 系统预设的非 MIMO 小区恢复到 MIMO小区的时间点。
系统还包括基站控制器， 用于发送带 CFN的重配消息给基站， 请求基站 将 MIMO小区重配为非 MIMO小区；
基站， 还用于收到该重配消息后， 在指定的 CFN将指定小区重配为非
MIMO小区并关闭一路发射天线。
基站控制器， 还用于在 MIMO小区重配为非 MIMO小区之前， 通过带 CFN的 SIB消息或重配消息通知 UE在该 CFN时该 MIMO小区将重配为非 MIMO小区。
所述系统还包括基站控制器， 用于发送带 CFN的重配消息给基站， 指示 基站将非 MIMO小区重配为 MIMO小区；
基站还用于收到该重配消息后，在指定的 CFN将指定小区重配为 MIMO 小区并打开被关闭的一路发射天线。
基站控制器还用于在非 MIMO小区重配为 MIMO小区之前，通过带 CFN 的 SIB消息或重配消息通知 UE在该 CFN时该非 MIMO小区将重配为 MIMO 小区。
一种基站节能系统， 其包括基站控制器， 所述基站控制器设置为： 在满足第一条件时， 接收基站发送的指示消息将 MIMO 小区重配为非 MIMO小区； 在满足第二条件时， 接收基站发送的指示消息将非 MIMO小区 重配为 MIMO小区； 或者
在满足第一条件时，主动将 MIMO小区重配为非 MIMO小区； 在满足第 二条件时， 主动将非 MIMO小区重配为 MIMO小区。
所述基站控制器为 RNC。 本发明除应用于 UMTS系统外， 也可应用于其他 MIMO系统， 本发明对 此不作限定。
尽管为示例目的， 已经公开了本发明的优选实施例， 本领域的技术人员 将意识到各种改进、 增加和取代也是可能的， 因此， 本发明的范围应当不限 于上述实施例。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以采用 硬件的形式实现， 也可以采用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
工业实用性
本文提供的基站节能方法和系统， 可以动态配置小区模式， 这样既能保 证 MIMO终端的体验度， 同时在用户数据量不大的情况下又能节约基站的能 耗。

Claims

权 利 要 求 书
1、 一种基站节能方法， 其包括：
在满足第一条件时， 基站进入节能模式， 所述基站的至少一个多输入多 输出 （MIMO ) 小区重配为非 MIMO小区；
在满足第二条件时， 基站进入正常模式， 所述基站的至少一个非 MIMO 小区重配为 MIMO小区。
2、 如权利要求 1所述的方法， 其中， 所述第一条件包括： MIMO小区 的用户数据量连续一段时间小于预设的 MIMO小区重配到非 MIMO小区用户 数据量门限， 和 /或 , 系统预设的 MIMO小区重配到非 MIMO小区的时间点。
3、 如权利要求 1 所述的方法， 其中， 所述第二条件包括： 非 MIMO 小区的用户数据量连续一段时间大于预设的非 MIMO小区恢复到 MIMO小区 用户数据量门限， 和 /或， 系统预设的非 MIMO小区恢复到 MIMO小区的时 间点。
4、 如权利要求 1所述的方法， 其中， 所述基站的至少一个 MIMO小 区重配为非 MIMO小区的步骤包括：
基站控制器下发带连接帧号 （CFN ) 的重配消息给基站， 请求基站将 MIMO小区重配为非 MIMO小区；
基站接收该重配消息后， 在指定的 CFN将指定小区重配为非 MIMO小 区并关闭一路发射天线。
5、 如权利要求 1或 4所述的方法， 所述方法还包括： 在 MIMO小区 重配为非 MIMO小区之前， 基站控制器通过带 CFN的系统信息块（ SIB ) 消 息或重配消息或自定义消息通知用户设备 ( UE )在该 CFN时该 MIMO小区 将重配为非 MIMO小区。
6、 如权利要求 1所述的方法，其中， 所述将基站的至少一个非 MIMO 小区重配为 MIMO小区的步骤包括：
基站控制器发送带 CFN的重配消息给基站， 请求基站将非 MIMO小区 重配为 MIMO小区； 基站收到该重配消息后， 在指定的 CFN将指定小区重配为 MIMO小区 并打开被关闭的一路发射天线。
7、 如权利要求 1或 6所述的方法， 所述方法还包括： 在非 MIMO小 区重配为 MIMO小区之前， 基站控制器通过带 CFN的 SIB消息或重配消息 或自定义消息通知 UE在该 CFN时该非 MIMO小区将重配为 MIMO小区。
8、 如权利要求 1所述的方法， 其中，
所述基站的至少一个 MIMO小区重配为非 MIMO小区包括：基站主动给 基站控制器发消息指示基站控制器将 MIMO小区重配为非 MIMO小区，或者， 基站控制器主动将 MIMO小区重配为非 MIMO小区；
所述基站的至少一个非 MIMO小区重配为 MIMO小区包括：基站主动给 基站控制器发消息指示基站控制器将非 MIMO小区重配为 MIMO小区，或者， 基站控制器主动将非 MIMO小区重配为 MIMO小区。
9、 一种基站节能系统， 其包括：
基站， 其设置为： 在满足第一条件时， 进入节能模式， 将该基站的至少 一个多输入多输出（MIMO )小区重配为非 MIMO小区； 在满足第二条件时， 进入正常模式， 将该基站的至少一个非 MIMO小区重配为 MIMO小区。
10、 如权利要求 9所述的系统， 其中， 所述第一条件包括 MIMO 'J、区 的用户数据量连续一段时间小于预设的 MIMO小区重配到非 MIMO小区用户 数据量门限， 和 /或 , 系统预设的 MIMO小区重配到非 MIMO小区的时间点。
11、 如权利要求 9所述的系统， 其中， 所述第二条件包括非 MIMO小 区的用户数据量连续一段时间大于预设的非 MIMO小区恢复到 MIMO小区用 户数据量门限， 和 /或， 系统预设的非 MIMO小区恢复到 MIMO小区的时间 点。
12、 如权利要求 9所述的系统， 其中， 所述系统还包括基站控制器， 其 设置为： 发送带连接帧号 （CFN ) 的重配消息给基站， 请求基站将 MIMO小 区重配为非 MIMO小区；
所述基站是设置为以如下方式将该基站的至少一个 MIMO小区重配为非 MIMO小区： 收到该重配消息后， 在指定的 CFN将指定小区重配为非 MIMO 小区并关闭一路发射天线。
13、 如权利要求 12所述的系统， 其中， 所述基站控制器还设置为： 在 MIMO小区重配为非 MIMO小区之前， 通过带 CFN的 SIB消息或重配消息 通知用户设备（ UE )在该 CFN时该 MIMO小区将重配为非 MIMO小区。
14、 如权利要求 9所述的系统， 其中， 所述系统还包括基站控制器， 其 设置为： 发送带 CFN的重配消息给基站， 指示基站将非 MIMO小区重配为 MIMO小区；
所述基站是设置为以如下方式将该基站的至少一个非 MIMO小区重配为 MIMO小区： 收到该重配消息后， 在指定的 CFN将指定小区重配为 MIMO 小区并打开被关闭的一路发射天线。
15、 如权利要求 14所述的系统， 其中， 所述基站控制器还设置为： 在 非 MIMO小区重配为 MIMO小区之前， 通过带 CFN的 SIB消息或重配消息 通知 UE在该 CFN时该非 MIMO小区将重配为 MIMO小区。
16、 一种基站节能系统， 其包括基站控制器， 所述基站控制器设置为： 在满足第一条件时， 接收基站发送的指示消息将 MIMO 小区重配为非
MIMO小区； 在满足第二条件时， 接收基站发送的指示消息将非 MIMO小区 重配为 MIMO小区； 或者
在满足第一条件时，主动将 MIMO小区重配为非 MIMO小区； 在满足第 二条件时， 主动将非 MIMO小区重配为 MIMO小区。
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