WO2011050717A1 - 一种节能方法、系统和基站 - Google Patents

一种节能方法、系统和基站 Download PDF

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Publication number
WO2011050717A1
WO2011050717A1 PCT/CN2010/078138 CN2010078138W WO2011050717A1 WO 2011050717 A1 WO2011050717 A1 WO 2011050717A1 CN 2010078138 W CN2010078138 W CN 2010078138W WO 2011050717 A1 WO2011050717 A1 WO 2011050717A1
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Prior art keywords
ofdm symbol
power
data
subframe
module
Prior art date
Application number
PCT/CN2010/078138
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English (en)
French (fr)
Inventor
徐莹
谷卫东
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112012010539-6A priority Critical patent/BR112012010539B1/pt
Priority to RU2012121845/07A priority patent/RU2517109C2/ru
Priority to EP10826080.3A priority patent/EP2487964B1/en
Publication of WO2011050717A1 publication Critical patent/WO2011050717A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0203Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/44TPC being performed in particular situations in connection with interruption of transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0203Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0261Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • H04W76/28Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention claims the priority of the Chinese patent application entitled “An Energy Saving Method and System", which is filed on October 27, 2009, to the Chinese Patent Office, Application No. 200910110376. The entire contents are incorporated herein by reference.
  • the present invention relates to the field of communications, and in particular, to an energy saving method, system, and base station. Background of the invention
  • LTE Long Term Evolution
  • FDD Frequency Division Duplexing
  • TDD Time Division Duplexing
  • a typical LTE radio frame consists of 20 long 0. 5ms time slots, and two adjacent time slots form one subframe, for a total of 10 subframes.
  • the content carried in the downlink subframe includes: pilot; traffic channel; synchronization channel, such as PSCH (Primary Synchronization Channel) and SSCH (Secondary Synchronization Channel); broadcast channel, such as BCH ( Broadcast Channel); control channel, such as PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid Automatic Repeat Request Indicator Channel), and PDCCH (Physical Downl Control Channel) , physical downlink control channel).
  • synchronization channel such as PSCH (Primary Synchronization Channel) and SSCH (Secondary Synchronization Channel
  • broadcast channel such as BCH ( Broadcast Channel)
  • control channel such as PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid Automatic Repeat Request Indicator Channel), and PDCCH (Physical Downl Control Channel) , physical downlink control channel).
  • An aspect of the present invention provides an energy saving method, including: when no actual content is transmitted on an 0FDM symbol of a subframe of an LTE system, turning off a transmit channel corresponding to the 0FDM symbol or reducing a power of the transmit channel.
  • Another aspect of the present invention provides an energy-saving system, including: a module 1 configured to determine whether a current OFDM symbol on a subframe of an LTE system carries actual content; and a module 2, configured to receive a judgment result of the module 1, When the judgment result is no, the transmission channel is turned off or the power of the transmission channel is reduced.
  • a base station where the base station is configured to close a transmission channel corresponding to the OFDM symbol or reduce a corresponding OFDM symbol when no actual content is transmitted on an OFDM symbol of a subframe of the LTE system. The power of the transmitting channel.
  • FIG. 1 is a schematic flow chart of an energy saving method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a scenario in an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for saving energy according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an energy saving system according to another embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a base station according to another embodiment of the present invention.
  • An embodiment of the present invention provides a method for saving energy, including: when no actual content is transmitted on a OFDM symbol of an LTE system, reducing a transmit channel power corresponding to a null transmission symbol or turning off the transmission aisle.
  • the space symbol may be a symbol in a subframe that does not carry actual content.
  • the LTE system can have 10 subframes per frame, and each subframe can have 14 OFDM symbols, so that there are 140 OFDM symbols in each frame. Some symbols in these symbols may not carry any actual content. Turning these symbols on the transmit channel at the moment or reducing the power of the transmit channel saves energy when the system is idle.
  • another embodiment of the present invention provides an energy saving method, as shown in FIG. 1, including the following steps.
  • the baseband subsystem receives the subframe data after the second layer scheduling.
  • Layer 2 can schedule LTE subframe data on various channels, such as PDCCH, PHICH, PBCH (Physical Broadcast Channel), etc., and the baseband subsystem transmits through Layer 2 to baseband interface receiving layer two subsystems.
  • the scheduled subframe data is not limited to PDCCH, PHICH, PBCH (Physical Broadcast Channel), etc.
  • the baseband subsystem performs baseband processing on the received subframe data.
  • the baseband subsystem performs a series of baseband processing on the received LTE subframe data, for example, CRC (cyclic redundancy check), modulation, coding, framing processing, and the like. Further, the baseband subsystem may also perform other additional or simplified processing on the subframe data, and does not constitute a limitation on the present invention.
  • the baseband subsystem determines whether the actual content is carried on the current OFDM symbol of the subframe.
  • some symbols on a certain subframe may not carry any actual content.
  • some symbols on a certain subframe may not carry any service data, such as user voice services.
  • Data generated by data or Internet browsing does not carry other pilot data and channel data.
  • the judging criterion may further include other data or signaling, for example, determining whether to carry certain data or signaling that can have a substantial impact on the stable operation of the system and user access and usage.
  • the baseband subsystem determines whether any one of service data, pilot data, synchronization channel data, broadcast channel data, and control channel data is carried on the current OFDM symbol of the subframe, and if not, determines the book. The actual content is not carried on the current OFDM symbol of the frame, and the process goes to S204.
  • the baseband subsystem determines whether any one of service data, pilot data, synchronization channel data, broadcast channel data, and control channel data is carried on the current OFDM symbol of the subframe, and if not, determines the book. The actual content is not carried on the current OFDM symbol of the frame, and the process goes to S204.
  • the symbol carries pilot data or synchronization channel data or broadcast channel data or control channel data
  • the baseband subsystem determines whether the transmit channel is closed. If a symbol does not carry any actual content, it can be further determined whether the transmission channel at the time corresponding to the symbol is turned off. If the transmission channel is not turned off at this time, it proceeds to S205. If the transmit channel is already closed, no further processing is possible. In another embodiment of the present invention, the determination of S204 may be omitted, that is, S205 is performed regardless of whether the current transmission channel is closed or not.
  • the baseband subsystem turns off the transmit channel or reduces the power of the transmit channel.
  • the baseband subsystem may issue a signal to close the transmission channel to close the transmission channel, or may not completely close the transmission channel, but instead issue a signal that reduces the power of the transmission channel, thereby reducing the transmission channel.
  • Power There are various ways to turn off the transmission channel or reduce the power of the transmission channel, such as turning off the power amplifier at the time corresponding to the symbol or reducing the power of the power amplifier, or turning off the intermediate frequency at the time corresponding to the symbol or reducing the power of the intermediate frequency portion. Or turn off the RF at the time corresponding to the symbol or reduce the RF unit.
  • the power of the points, or a combination of the above, does not constitute a limitation of the present invention. Since the present embodiment distinguishes between a symbol carrying actual content and a symbol not carrying any content, for a symbol that does not carry any content, the power of the transmission channel at the time corresponding to the symbol is reduced or the time corresponding to the symbol is turned off.
  • the upper launch channel which saves system energy consumption.
  • a partial OFDM symbol of one LTE frame carries actual content as shown in FIG. 2
  • zero to nine columns represent 10 subframes in one LTE frame
  • 0 to 13 rows represent 14 OFDM in time domain.
  • the baseband subsystem sends the subband data processed by the baseband to the middle radio frequency subsystem and adjusts the transmitting channel to be in a normal transmitting state, and enters S207. If the actual content is carried on the current OFDM symbol, the baseband subsystem can transmit the processed subframe data to the middle radio frequency subsystem. If the current transmit channel has been turned off or the power is reduced, adjust the transmit channel to make it In the normal transmission state, so that the content carried on the current OFDM symbol can be normally transmitted. Of course, if the current transmit channel is in a normal transmittable state, the processed subframe data is directly sent to the medium RF subsystem.
  • the medium radio frequency subsystem receives the sub-frame data after the baseband processing, performs the radio frequency processing, and transmits.
  • Another embodiment of the present invention further provides an energy saving method, as shown in FIG. 3, including:
  • the baseband subsystem receives the subframe data after the second layer scheduling.
  • Layer 2 may schedule subframe data of various channels, such as PDCCH, PHICH, PBCH, etc., and the baseband subsystem receives subframe data after scheduling by the layer two subsystem through the layer 2 to baseband interface.
  • the baseband subsystem performs baseband processing on the received subframe data.
  • the baseband subsystem performs a series of baseband processing on the received subframe data, such as error correction, modulation, coding, and the like.
  • the baseband subsystem determines whether the current content of the current 0FDM symbol of the subframe carries the actual content.
  • the baseband subsystem determines whether any one of the service data, the pilot data, the synchronization channel data, the broadcast channel data, and the control channel data is carried on the current OFDM symbol of the subframe, and if not, determines the current OFDM symbol of the subframe. The actual content is not carried.
  • the baseband subsystem sends the processed subframe data and the judgment result to the middle radio frequency subsystem, and the process goes to S304.
  • the medium RF subsystem turns off the transmission channel or reduces the power of the transmission channel.
  • the difference between the processed subframe data transmitted by the baseband receiving baseband and the current OFDM symbol of the subframe and the actual content of the subframe is different from the previous embodiment.
  • the medium RF subsystem may send a signal to close the transmission channel to close the transmission channel, or may not completely close the transmission channel, but send a signal that reduces the power of the transmission channel. , thereby reducing the power of the transmitting channel.
  • it may also be judged whether the transmission channel is closed before S304, if not, then to S304; if it is already closed, no processing may be performed.
  • a symbol carrying the actual content and a symbol not carrying any content are distinguished.
  • the power of the transmitting channel at the time corresponding to the symbol is reduced or the time corresponding to the symbol is turned off.
  • the upper launch channel which saves system energy consumption.
  • Another embodiment of the present invention also provides an energy-saving system. As shown in FIG. 4, the system includes a module 1 and a module.
  • Module 1 is used to determine whether the current OFDM symbol on the subframe of the LTE system carries the actual content. When the system load is light, some symbols in a certain subframe may not carry any service data, such as user voice service data or data generated by Internet browsing, and do not carry other pilot data and channel data, etc. In an embodiment, the module 1 may determine whether the OFDM symbol corresponding to the current time in a certain subframe contains any service data or other pilot data and various channel data, if the current OFDM symbol of the current subframe does not include the service data and the pilot data.
  • the module 1 can be located within the baseband subsystem. Further, when the module 1 determines whether to carry the actual content, the determining criterion may further include other data or signaling, for example, determining whether to bear certain data or signaling that can substantially affect the stable operation of the system and the user access and use. , can be used as module 1 to determine whether to carry the actual content of the judgment criteria.
  • the module 2 is configured to receive the judgment result of the module 1, and when the judgment result is no, close the transmission channel corresponding to the current OFDM symbol or reduce the transmission channel power. Further, the module 2 can be located in the baseband subsystem or in the middle RF subsystem. Further, the energy saving system (for example, in another embodiment of the present invention) may further include a module 3, configured to receive the scheduled subframe data of the layer 2. Specifically, the module 3 may be located in the baseband subsystem, and receive the scheduled subframe data sent by the layer two subsystem through the interface of the layer 2 to the baseband subsystem.
  • the transmission channel in the energy-saving system may include a power amplifier module, an intermediate frequency module, a radio frequency module, and the like, and the module 2 may include a module 21 for closing according to the judgment result of the module 1.
  • the symbol may correspond to the power amplifier at the moment or reduce the power of the power amplifier, and may further include a module 22, configured to turn off the intermediate frequency at the time corresponding to the symbol or reduce the power of the intermediate frequency portion according to the judgment result of the module 1, and may further include a module 23, It is used to turn off the radio frequency at the time corresponding to the symbol or reduce the power of the radio frequency portion according to the judgment result of the module 1.
  • the module 2 may also include only one or two of the module 21, the module 22, and the module 23.
  • the energy-saving system provided by the embodiment of the present invention distinguishes between an OFDM symbol carrying actual content and an OFDM symbol carrying no content, and for an OFDM symbol that does not carry any content, reducing a transmission channel at a time corresponding to the OFDM symbol The power or the transmission channel at the time corresponding to the OFDM symbol is turned off, thereby saving energy consumption of the system.
  • the energy-saving system provided by the embodiment of the present invention can be applied to an LTE FDD system, and can also be applied to an LTE TDD system.
  • the base station when there is no actual content transmission on an OFDM symbol of a subframe of an LTE system, the base station may close a transmission channel corresponding to the OFDM symbol or reduce the The power of the transmit channel corresponding to the OFDM symbol.
  • the base station includes a baseband subsystem 510 and a medium radio frequency subsystem 520.
  • the baseband subsystem 510 and the medium radio frequency subsystem 520 can perform the steps in the method provided by the foregoing method embodiments.
  • the steps of a method or algorithm described in the embodiments disclosed herein may be implemented in hardware, a software module executed by a processor, or a combination of both.
  • the software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD_ROM, or the art. Any other form of storage medium.
  • RAM random access memory
  • ROM read only memory
  • electrically programmable ROM electrically erasable programmable ROM
  • registers hard disk, removable disk, CD_ROM, or the art. Any other form of storage medium.

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Description

一种节能方法、 系统和基站 本申请要求于 2009年 10月 27日提交中国专利局、 申请号为 200910110376. 7、 发 明名称为 "一种节能方法及系统"的中国专利申请的优先权, 其全部内容通过引用结合 在本申请中。 技术领域 本发明涉及通信领域, 特别涉及一种节能方法、 系统和基站。 发明背景
LTE (Long Term Evolution , 长期演进)系统引入了 OFDM (Orthogonal Frequency Division Multiplex, 正交频分复用)技术, 同时还支持两种基本的工作模式, 即频分 双工 (Frequency Division Duplexing, FDD) 禾口时分双工 ( Time Division Duplexing, TDD)。 一个典型的 LTE无线帧由 20个长 0. 5ms的时隙构成, 两个相邻的时隙组成一个 子帧, 共 10个子帧。 LTE下行子帧中, 当使用常规循环前缀 (Cycl ic Prefix, CP) 时, 一个时隙包含 7个 OFDM符号, 因此从时域上看, 每个子帧含 14个 0FDM符号, 每个符 号占用 l/14ms,下行子帧承载的内容包括:导频;业务信道;同步信道,例如 PSCH (Primary Synchronization Channel ,主同步信道)禾口 SSCH (Secondary Synchronization Channel , 辅同步信道); 广播信道, 例如 BCH (Broadcast Channel); 控制信道, 例如 PCFICH (Physical Control Format Indicator Channel , 物理控制格式指示信道)、 PHICH (Physical Hybrid Automatic Repeat Request Indicator Channel , 物理混合自 动请求重传指示信道)和 PDCCH (Physical Downl ink Control Channel , 物理下行控制 信道)。
现有技术中, 发送下行子帧的方法容易造成能源浪费。 发明内容
本发明的一方面提供一种节能方法, 包括: 当 LTE系统的子帧的 0FDM符号上无实际 内容发送时, 关闭所述 0FDM符号对应的发射通道或者减小所述发射通道的功率。
本发明的另一方面提供一种节能系统, 包括: 模块 1, 用于判断 LTE系统的子帧上当 前的 0FDM符号是否承载有实际内容; 模块 2, 用于接收模块 1的判断结果, 当所述判断结 果为否时, 关闭所述发射通道或者减小所述发射通道的功率。 本发明的另一方面提供一种基站, 所述基站用于当 LTE系统的子帧的 OFDM符号上无 实际内容发送时, 关闭所述 OFDM符号对应的发射通道或者减小所述 OFDM符号对应的发射 通道的功率。
由上可见, 通过对于承载有实际内容的符号和没有承载任何内容的符号进行区分, 对于没有承载任何内容的符号,减小该符号所对应时刻上的发射通道的功率或者关闭该 符号所对应时刻上的发射通道, 可以节省系统的能耗。 附图简要说明 图 1为本发明实施例提供的一种节能的方法流程示意图;
图 2为本发明一实施例中的场景示意图;
图 3为本发明另一实施例提供的一种节能的方法流程示意图;
图 4为本发明另一实施例提供的一种节能系统的结构示意图;
图 5为本发明另一实施例提供的一种基站的结构示意图。 实施本发明的方式 本发明的一个实施例提供了一种节能的方法, 包括: 当 LTE系统子帧 OFDM符号上无 实际内容发送时, 将空发符号对应的发射通道功率减小或者关闭该发射通道。 其中, 空 发符号可以是某一子帧中不承载实际内容的符号。 LTE系统的每帧中可以有 10个子帧, 而每个子帧可以有 14个 0FDM符号, 这样每帧中共有 140个 0FDM符号, 在这些符号中有的 符号可能不承载任何实际内容,此时可将这些符号对应时刻的发射通道关闭或者减小发 射通道的功率, 这样可以在系统空闲时节省能耗。 以 LTE FDD系统为例, 本发明另一个实施例提供了一种节能的方法, 如图 1所示, 包 括如下步骤。
S201 , 基带子系统接收层二调度后的子帧数据。 层二可以对各种信道, 例如 PDCCH、 PHICH、 PBCH (Physical Broadcast Channel , 物理广播信道) 等, 上的 LTE子帧数据进行调度, 基带子系统通过层二至基带的接口接 收层二子系统发送过来的调度后的子帧数据。
S202, 基带子系统对接收到的子帧数据进行基带处理。 基带子系统对于接收到的 LTE子帧数据进行一系列的基带处理, 例如, CRC (cycl ic redundancy check, 循环冗余校验)、 调制、 编码、 组帧处理等。 进一步的, 基带子系 统还可以对于子帧数据进行其他的附加或简化处理, 并不构成对于本发明的限制。
5203, 基带子系统判断本子帧当前的 OFDM符号上是否承载有实际内容。 当系统负载较轻的时候, 某一子帧上的某些符号可能不承载任何实际内容, 具体来 说, 某一子帧上的某些符号上可能既不承载任何业务数据, 例如用户语音业务数据或上 网浏览产生的数据, 也不承载其他导频数据和信道数据。 进一步的, 在判断是否承载实 际内容时, 判断标准还可以包括其他数据或信令, 例如判断是否承载对于系统稳定运行 和用户接入及使用能够产生实质性影响的某些数据或信令。 在本实施例中, 基带子系统判断本子帧当前的 OFDM符号上是否承载有业务数据、 导 频数据、 同步信道数据、 广播信道数据、 控制信道数据中的任意一种, 如果没有, 则判 定本子帧当前的 OFDM符号上没有承载实际内容, 此时转到 S204。 在本发明的另一个实施例中, 如果某符号上有业务数据需要发送, 或者虽然没有业 务数据需要发送,但是该符号上承载有导频数据或同步信道数据或广播信道数据或控制 信道数据, 则判定本子帧当前的 OFDM符号上承载有实际内容。 考虑到系统的正常接入和 稳定运行, 仍然要对该 OFDM符号按照正常的流程处理并发送, 即转到 S206。
5204, 基带子系统判断发射通道是否关闭。 如果某符号不承载任何实际内容,此时可以进一步判断在该符号所对应时刻上的发 射通道是否关闭。 如果此时发射通道没有关闭, 则进入 S205。 如果发射通道已经关闭, 则可以不做进一步处理。 在本发明的另一个实施例中, 也可以不做 S204的判断, 即不论当前发射通道是否关 闭都执行 S205。
5205, 基带子系统关闭发射通道或者减小发射通道的功率。 当某符号不承载任何实际内容时,基带子系统可以发出关闭发射通道的信号从而关 闭发射通道, 或者也可以不完全关闭发射通道, 而是发出减小发射通道功率的信号, 从 而减小发射通道的功率。 关闭发射通道或者减少发射通道的功率的方式可以有多种, 例 如关闭该符号所对应时刻上的功放或者减小功放的功率, 或者关闭该符号所对应时刻上 的中频或者减少中频部分的功率, 或者关闭该符号所对应时刻上的射频或者减少射频部 分的功率, 或者上述几种方式的结合等, 并不构成对于本发明的限制。 由于本实施例对 于承载有实际内容的符号和没有承载任何内容的符号进行了区分,对于没有承载任何内 容的符号,减小该符号所对应时刻上的发射通道的功率或者关闭该符号所对应时刻上的 发射通道, 由此可以节省系统的能耗。 在如图 2所示的 1个 LTE帧的部分 OFDM符号承载实 际内容的一个场景中, 零〜九列表示 1个 LTE帧中的 10个子帧, 0〜13行表示时域上的 14 个 OFDM符号, 这样每个 LTE帧的 140个符号中, 有 93个符号不用发射任何内容, 占总符号 数的 66. 4%, 通过减小或者关闭这些符号所在时刻的发射通道功率, 可以显著的降低基 站的功耗。 此外在 LTE TDD系统中, 也可以参照上述的方法实现系统能耗的节省。
5206 ,基带子系统将经过基带处理的子帧数据发送给中射频子系统并调节发射通道 使之处于正常发射状态, 进入 S207。 当前 OFDM符号上如果承载有实际内容,此时基带子系统可以将处理后的子帧数据发 射给中射频子系统, 如果当前发射通道已经被关闭或者功率被减小, 则调节发射通道, 使之处于正常发射状态, 以便当前 OFDM符号上承载的内容能够正常发射。 当然, 如果当 前发射通道处于正常的可发射状态, 则直接将经过处理的子帧数据发送给中射频子系统 即可。
5207 , 中射频子系统接收经过基带处理之后的子帧数据, 进行中射频处理并发送。 本发明另一实施例还提供了一种节能的方法, 如图 3所示, 包括:
5301 , 基带子系统接收层二调度后的子帧数据。 层二可以对各种信道, 例如 PDCCH、 PHICH、 PBCH等, 的子帧数据进行调度, 基带子 系统通过层二至基带的接口接收经过层二子系统调度之后的子帧数据。
5302 , 基带子系统对接收到的子帧数据进行基带处理。 基带子系统对于接收到的子帧数据进行一系列的基带处理, 例如, 纠错、 调制、 编 码等。
5303 , 基带子系统判断本子帧当前的 0FDM符号上是否承载有实际内容。 基带子系统判断本子帧当前的 0FDM符号上是否承载有业务数据、 导频数据、 同步信 道数据、 广播信道数据、 控制信道数据中的任意一种, 如果没有, 则判定本子帧当前的 0FDM符号上没有承载实际内容, 此时基带子系统将处理后的子帧数据及判断结果发送 给中射频子系统, 转到 S304。 S304, 中射频子系统关闭发射通道或者减少发射通道的功率。 中射频子系统接收基带发送过来的处理后的子帧数据以及子帧当前 OFDM符号是否 承载有实际内容的判断结果, 与前一实施例所不同的是, 在本实施例中, 当 S303判断结 果为否, 即当前 OFDM符号不包含任何实际内容时, 可以由中射频子系统发出关闭发射通 道的信号从而关闭发射通道, 或者也可以不完全关闭发射通道, 而是发出减小发射通道 功率的信号, 从而减小发射通道的功率。 在另一实施例中, 还可以在 S304之前对发射通 道是否关闭进行判断, 如果没有关闭, 则进入 S304; 如果已经关闭, 则可以不做处理。 本发明实施例对于承载有实际内容的符号和没有承载任何内容的符号进行了区分, 对于没有承载任何内容的符号,减小该符号所对应时刻上的发射通道的功率或者关闭该 符号所对应时刻上的发射通道, 由此可以节省系统的能耗。 本发明另一实施例还提供了一种节能的系统, 如图 4所示, 该系统包括模块 1和模块
模块 1用于判断 LTE系统的子帧上当前的 OFDM符号是否承载有实际内容。当系统负载 较轻的时候, 某一子帧上的某些符号可能不承载任何业务数据, 例如用户语音业务数据 或上网浏览产生的数据, 也不承载其他导频数据和信道数据等, 因此本实施例中可以由 模块 1判断某子帧上当前时刻对应的 OFDM符号是否包含任何业务数据或其他导频数据以 及各种信道数据, 如果本子帧当前的 OFDM符号上不包括业务数据、 导频数据、 同步信道 数据、 广播信道数据、 控制信道数据中的任意一种, 则判定当前的 OFDM符号上没有承载 实际内容, 可以减小或者关闭本子帧当前的 OFDM符号对应的发射通道。 本实施例中, 模 块 1可以位于基带子系统内。 进一步的, 模块 1在判断是否承载实际内容时, 判断标准还可以包括其他数据或信 令,例如判断是否承载对于系统稳定运行和用户接入及使用能够产生实质性影响的某些 数据或信令, 都可以作为模块 1判断是否承载实际内容的判断标准。 模块 2用于接收模块 1的判断结果, 并当判断结果为否时, 关闭当前的 OFDM符号对应 的发射通道或者减小发射通道功率。 进一步的, 模块 2既可以位于基带子系统内, 也可 以位于中射频子系统内。 进一步的, 该节能系统 (例如在本发明的另一个实施例中) 还可以包括模块 3, 用 于接收层 2调度后的子帧数据。 具体的, 该模块 3可以位于基带子系统内, 通过层 2至基 带子系统的接口接收层二子系统发送过来的调度后的子帧数据。 进一步的, 该节能系统 (例如在本发明的另一个实施例中) 中的发射通道可以包括 功放模块、 中频模块、 射频模块等, 模块 2可以包括模块 21, 用于根据模块 1的判断结果 关闭该符号对应时刻上的功放或者减小功放的功率, 还可以包括模块 22, 用于根据模块 1的判断结果关闭该符号对应时刻上的中频或者减小中频部分的功率, 还可以包括模块 23,用于根据模块 1的判断结果关闭该符号对应时刻上的射频或者减小射频部分的功率, 当然模块 2也可以只包括模块 21、 模块 22和模块 23中的任意一种或两种。 本发明实施例提供的节能系统对于承载有实际内容的 OFDM符号和没有承载任何内 容的 OFDM符号进行了区分, 对于没有承载任何内容的 OFDM符号, 减小该 OFDM符号所对应 时刻上的发射通道的功率或者关闭该 OFDM符号所对应时刻上的发射通道, 由此可以节省 系统的能耗。 本发明实施例提供的节能系统即可应用在 LTE FDD系统中, 也可以应用在 LTE TDD系 统中。
本发明的另一个实施例提供一种基站, 该实施例中, 在 LTE系统的子帧的 OFDM符号 上无实际内容发送时, 该基站可以关闭所述 OFDM符号对应的发射通道或者减小所述 OFDM 符号对应的发射通道的功率。 如图 5所示, 该基站包括基带子系统 510和中射频子系统 520。 其中, 上述基带子系统 510和中射频子系统 520可以执行前述方法实施例提供的方 法中的步骤。 本发明中所公开的实施例描述的方法或算法的步骤可以用硬件、处理器执行的软件 模块, 或者二者的结合来实施。 软件模块可以置于随机存储器 (RAM) 、 内存、 只读存 储器(ROM)、 电可编程 R0M、 电可擦除可编程 R0M、 寄存器、硬盘、可移动磁盘、 CD_R0M、 或技术领域内所公知的任意其它形式的存储介质中。 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进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 明技术方案的范围。

Claims

权利要求
1、 一种节能方法, 其特征在于, 包括:
当 LTE系统的子帧的 OFDM符号上无实际内容发送时, 关闭所述 OFDM符号对应的发射 通道或者减小所述 OFDM符号对应的发射通道的功率。
2、 如权利要求 1所述的节能方法, 其特征在于, 所述当 LTE系统的子帧的 OFDM符号 上无实际内容发送时,关闭所述 OFDM符号对应的发射通道或者减小所述 OFDM符号对应的 发射通道的功率包括:
基带子系统接收层二调度后的子帧数据;
基带子系统对所述子帧数据进行基带处理;
基带子系统判断所述子帧的 OFDM符号是否承载有实际内容; 如果所述子帧的 OFDM符 号没有承载有实际内容, 则关闭所述 OFDM符号对应的发射通道或者减小所述 OFDM符号对 应的发射通道的功率。
3、 如权利要求 1所述的节能方法, 其特征在于, 所述当 LTE系统的子帧的 OFDM符号 上无实际内容发送时,关闭所述 OFDM符号对应的发射通道或者减小所述 OFDM符号对应的 发射通道的功率包括:
基带子系统接收层二调度后的子帧数据;
基带子系统对所述子帧数据进行基带处理并判断所述子帧的 OFDM符号上是否承载 有实际内容;
将所述经过基带处理后的子帧数据及所述判断的结果发送给中射频子系统; 所述中射频子系统接收所述经过基带处理后的子帧数据及所述判断的结果, 并当所 述判断结果为否时,关闭所述 0FDM符号对应的发射通道或者减小所述 0FDM符号对应的发 射通道的功率。
4、 如权利要求 1-3任一项所述的节能方法, 其特征在于,
所述关闭所述 0FDM符号对应的发射通道包括: 关闭所述 0FDM符号所对应时刻上的功 放, 中频, 和射频中的任一项或任意多项。
5、 如权利要求 1-3任一项所述的节能方法, 其特征在于,
所述减小所述 0FDM符号对应的发射通道的功率包括: 减小所述 0FDM符号所对应时刻 上的功放的功率, 中频部分的功率, 和射频部分的功率中的任一项或任意多项。
6、 如权利要求 1-3任一项所述的节能方法, 其特征在于, 在所述关闭所述 0FDM符号 对应的发射通道或者减小所述 0FDM符号对应的发射通道的功率之前, 所述方法还包括: 判断所述 OFDM符号对应的发射通道未关闭。
7、 如权利要求 2所述的节能方法, 其特征在于, 所述方法还包括:
如果基带子系统判断所述子帧的 OFDM符号承载有实际内容, 则将所述子帧数据发送 给中射频子系统进行处理并发送。
8、 如权利要求 1-7任一项所述的节能方法, 其特征在于, 所述实际内容包括以下任 一项或多项:
业务数据、导频数据、信道数据、对系统稳定运行有实质性影响的其他数据或信令、 或对用户接入及使用有实质性影响的其他数据或信令。
9、 一种节能系统, 其特征在于, 包括:
模块 1, 用于判断 LTE系统的子帧的 OFDM符号是否承载有实际内容;
模块 2, 用于接收模块 1的判断结果, 当所述判断结果为否时, 关闭所述 OFDM符号对 应的发射通道或者减小所述 OFDM符号对应的发射通道的功率。
10、 如权利要求 9所述的节能系统, 其特征在于, 所述模块 2包括以下模块 21、 模块 22和模块 23中的任一项或任意多项, 其中,
模块 21用于根据所述模块 1的判断结果关闭所述符号对应时刻上的功放或者减小所 述功放的功率;
模块 22用于根据所述模块 1的判断结果关闭该符号对应时刻上的中频或者减小所述 中频部分的功率;
模块 23用于根据所述模块 1的判断结果关闭该符号对应时刻上的射频或者减小所述 射频部分的功率。
11、 如权利要求 9或 10所述的节能系统, 其特征在于,
所述模块 1和模块 2位于基带子系统中; 或者,
所述模块 1位于基带子系统中, 模块 2位于中射频子系统中。
12、 如权利要求 9至 11任一项所述的节能系统, 其特征在于, 所述节能系统还包括: 模块 3, 位于基带子系统, 且用于通过层二至基带子系统的接口接收层二调度后的 子帧数据, 并对所述子帧数据进行基带处理。
13、 如权利要求 12所述的节能系统, 其特征在于,
如果所述模块 2位于基带子系统, 所述模块 2还用于接收所述模块 3进行基带处理后 的子帧数据, 并当所述模块 1的判断结果为是时, 将所述子帧数据发送给中射频子系统 进行处理并发送。
14、 如权利要求 9所述的节能系统, 其特征在于, 所述实际内容包括以下任一项或 多项:
业务数据、导频数据、信道数据、对系统稳定运行有实质性影响的其他数据或信令、 或对用户接入及使用有实质性影响的其他数据或信令。
15、 如权利要求 9至 14任一项所述的节能系统, 其特征在于, 所述节能系统位于基 站中。
16、 一种基站, 其特征在于, 所述基站用于当 LTE系统的子帧的 OFDM符号上无实际 内容发送时, 关闭所述 OFDM符号对应的发射通道或者减小所述 OFDM符号对应的发射通道 的功率。
17、 如权利要求 16所述的基站, 其特征在于, 所述 LTE系统的子帧的 OFDM符号上无 实际内容是由所述基站中的基带子系统判断出来的;
所述关闭发射通道或者减小发射通道的功率是由所述基带子系统或中射频子系统 来执行的。
18、 如权利要求 16所述的基站, 其特征在于, 所述基站关闭所述 OFDM符号对应的发 射通道是指所述基站关闭所述 OFDM符号所对应时刻上的功放, 中频, 和射频中的任一项 或任意多项。
19、 如权利要求 16所述的基站, 其特征在于, 所述基站减小所述 OFDM符号对应的发 射通道的功率是指所述基站减小所述 OFDM符号所对应时刻上的功放的功率, 中频部分的 功率, 和射频部分的功率中的任一项或任意多项。
20、 如权利要求 1-19任一项所述的基站, 其特征在于, 所述实际内容包括以下任一 项或多项:
业务数据、导频数据、信道数据、对系统稳定运行有实质性影响的其他数据或信令、 或对用户接入及使用有实质性影响的其他数据或信令。
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