一种子帧配置方法及系统 技术领域 Subframe configuration method and system
本发明涉及移动通信长期演进系统中的基站领域， 尤其涉及一种子帧 配置方法及系统。 背景技术 The present invention relates to the field of base stations in a mobile communication long term evolution system, and in particular, to a subframe configuration method and system. Background technique
在移动通信中， 用户设备（UE, User Equipment ) 的功耗非常受重视， 通用陆地无线电接入网络 （UTRA , Universal Terrestrial Radio Access Network )和演进型通用陆地无线电接入网络（ E-UTRA, Evolved Universal Terrestrial Radio Access Network )等都发展了高效的不连续发送（DTX, Discontinuous Transmission )和不连续接收 ( DRX, Discontinuous Reception ) 技术， 来降低功耗， 达到节能的目的。 In mobile communication, the power consumption of user equipment (UE, User Equipment) is highly valued, Universal Terrestrial Radio Access Network (UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRA, Evolved) The Universal Terrestrial Radio Access Network has developed efficient DTX (Discontinuous Transmission) and Discontinuous Reception (DRX) technologies to reduce power consumption and save energy.
所谓 DTX技术， 是指在一个通信过程中， 由于移动用户实际仅有很少 的时间用于通话， 大部分时间都没有传送话音消息， 当移动用户不通话时， 终端才接收网络消息， 判断是否存在信息更新， 如果存在更新， 移动终端 就进行上行同步， 网络就可以知道该移动终端是被寻呼对象， 进而建立该 移动终端和呼叫终端的连接； 因此， 在寻呼周期间隙， 网络将不向移动终 端发送网络消息， 如果将网络消息全部传送给移动终端的话， 不但会对系 统资源造成浪费， 而且会使系统内的干扰加重， 这就是所谓的不连续发送。 所谓 DRX技术， 是指手机一直睡眠， 每隔几个 "多帧"， 大约相当于八分 之一秒的时间段才醒来一次， 系统可以指示手机每秒四次醒来检查是否有 来电（DRX2 ), 或大约每秒一次（DRX9 )醒来， 这种作法牺牲的是检测到 来电所需的时间， 在 DRX操作中， 处理器将关闭接收器并使自己进入低功 耗的睡眠模式， 一个内部定时器会在经过适当的睡眠时间之后重新启动处 理器。The so-called DTX technology means that in a communication process, since the mobile user actually has only a small amount of time for the call, most of the time, no voice message is transmitted. When the mobile user does not talk, the terminal receives the network message, and determines whether There is information update. If there is an update, the mobile terminal performs uplink synchronization, and the network can know that the mobile terminal is a paged object, thereby establishing a connection between the mobile terminal and the calling terminal; therefore, during the paging cycle interval, the network will not Sending a network message to the mobile terminal, if all the network messages are transmitted to the mobile terminal, not only will the system resources be wasted, but also the interference within the system will be aggravated, which is called discontinuous transmission. The so-called DRX technology means that the mobile phone has been sleeping all the time. It wakes up every few "multi-frames", which is about one-eighth of a second. The system can instruct the mobile phone to wake up four times per second to check if there is an incoming call. DRX2), or about once every second (DRX9) wakes up, this method sacrifices the time required to detect an incoming call. In DRX operation, the processor turns off the receiver and puts itself into low power. In sleep mode, an internal timer restarts the processor after a proper amount of sleep.
但是对于基站的功率消耗、 节能等相关问题， 长期不受重视。 随着世 界能源问题、 气候问题的日益严重， 基站在节能、 低碳等方面的性能逐渐 受到运营商的重视。 Ericsson 向第三代合作伙伴计划 （3GPP , the 3rd Generation Partnership Project )全会提交了《R10 RAN 1/4 Enhanced cell DTX for LTE》 （WID = RP-091431 )立项建议，该建议在全会上得到了 Vodafone 等众多运营商及设备商的支持，目前在长期演进（ LTE, Long Term Evolution ) 的标准制订中已经将基站节能作为一个研究课题， 并开展基站的相关节能 技术的研究。 However, related issues such as power consumption and energy saving of the base station have not been taken seriously for a long time. With the world's energy problems and climate problems becoming increasingly serious, the performance of base stations in terms of energy saving and low carbon is gradually being valued by operators. Ericsson submitted a proposal for R10 RAN 1/4 Enhanced cell DTX for LTE (WID = RP-091431) to the 3rd Generation Partnership Project (3GPP, the 3rd Generation Partnership Project), which received Vodafone at the plenary session. Supported by many operators and equipment vendors, base station energy conservation has been considered as a research topic in the standardization of Long Term Evolution (LTE), and research on related energy-saving technologies of base stations has been carried out.
通过对 LTE基站的实际运行分析， 发现 LTE基站的功率主要消耗在三 个方面： （1 )基带数据处理： 主要耗费在接收信号的基带数据处理上； （2 ) 基站射频部分： 主要耗费在发射机的功放上； （3 )其它： 比如用于主动式 散热等。 Through the actual operation analysis of the LTE base station, it is found that the power of the LTE base station is mainly consumed in three aspects: (1) Baseband data processing: mainly consumes the baseband data processing of the received signal; (2) the base station radio frequency part: mainly consumes in the transmission On the power amplifier of the machine; (3) Others: For example, for active heat dissipation.
对于基带数据处理， 功率的节省主要依靠信号处理算法或者实现硬件 的更新改进， 例如利用效率较高的算法处理数据， 就可以减少冗余计算从 而达到省电的目的； 对于基站射频部分， 很多在功放上损失的功率与功放 的瞬时输出功率无关， 此时， 只有将功放关掉才能避免功率损失。 如果能 使基站关机的时间足够长， 则基站节能和功放效率的提高都会非常明显； 但是如果关闭射频， 就意味着基站不能再发送任何信息，因此只通过关闭射 频来省电的这种方法不够完善， 并不能够既保证用户设备的数据的传输又 省电节能。 发明内容 For baseband data processing, the power saving mainly depends on the signal processing algorithm or the hardware update improvement. For example, using a more efficient algorithm to process the data, the redundant calculation can be reduced to achieve the purpose of power saving; The power lost on the amplifier is independent of the instantaneous output power of the amplifier. At this point, power loss can only be avoided by turning off the amplifier. If the base station can be turned off for a long enough time, the efficiency of the base station and the efficiency of the power amplifier will be improved. However, if the radio is turned off, it means that the base station can no longer send any information, so it is not enough to save power by turning off the radio. Perfect, it can not guarantee the transmission of data of user equipment and save energy and energy. Summary of the invention
有鉴于此， 本发明的主要目的在于提供一种子帧配置方法及系统， 既 不影响单播业务的传输， 同时还能实现基站的省电节能。 为达到上述目的， 本发明的技术方案是这样实现的：In view of this, the main purpose of the present invention is to provide a method and system for configuring a subframe, which does not affect the transmission of the unicast service, and at the same time, realizes the power saving of the base station. In order to achieve the above object, the technical solution of the present invention is achieved as follows:
本发明提供一种子帧配置方法， 包括： The present invention provides a subframe configuration method, including:
基站将单播子帧转配置为多媒体广播组播业务单频网络（MBSFN )子 帧， 并将转配置的 MBSFN子帧的配置信令发送给用户设备（UE ), 之后， 所述基站对转配置的 MBSFN子帧进行处理。 The base station converts the unicast subframe into a multimedia broadcast multicast service single frequency network (MBSFN) subframe, and sends configuration information of the configured MBSFN subframe to the user equipment (UE), and then the base station rotates The configured MBSFN subframe is processed.
上述方法中， 所述单播子帧为基站确定的空闲的单播子帧。 In the above method, the unicast subframe is an idle unicast subframe determined by the base station.
上述方法中，所述基站将单播子帧转配置为 MBSFN子帧之前，该方法 还包括： In the above method, before the base station forwards the unicast subframe to the MBSFN subframe, the method further includes:
基站将 UE的数据集中调度在一个或者多个单播子帧内发送给 UE。 上述方法中，所述基站将 UE的数据集中调度在一个或者多个单播子帧 内发送给 UE为： The base station centrally schedules the data of the UE to be sent to the UE in one or more unicast subframes. In the above method, the base station schedules the data of the UE in one or more unicast subframes and sends the data to the UE:
在频分双工模式下， 基站将数据集中在单播子帧的下行子帧 #0和 #5中 调度； In the frequency division duplex mode, the base station concentrates the data in the downlink subframes #0 and #5 of the unicast subframe, and schedules;
当所述下行子帧 #0和 #5的资源不够传输小区内的单播业务时， 使用下 行子帧 #4和 #9; When the resources of the downlink subframes #0 and #5 are insufficient to transmit the unicast service in the cell, the downlink subframes #4 and #9 are used;
当 #0、 #4、 #5和 #9的资源够传输小区内的单播业务时， 其他子帧被空 闲； When the resources of #0, #4, #5, and #9 are sufficient to transmit unicast services in the cell, other subframes are idle;
当 #0、 #4、 #5和 #9的资源不够传输小区内的单播业务时， 增加子帧。 上述方法中， 该方法还包括： When the resources of #0, #4, #5, and #9 are insufficient to transmit the unicast service in the cell, the subframe is added. In the above method, the method further includes:
基站根据单播业务的数据量判断是否出现空闲的单播子帧， 当一段时 间内在一个或者多个单播子帧内的用户的数据量一直保持不变时， 确定剩 余的单播子帧是空闲的单播子帧。 The base station determines, according to the data volume of the unicast service, whether an idle unicast subframe occurs. When the data volume of the user in one or more unicast subframes remains unchanged for a period of time, determining that the remaining unicast subframe is Idle unicast subframe.
上述方法中， 所述将转配置的 MBSFN子帧的配置信令发送给 UE为： 基站通过系统信息块 2 ( SIB2 )中的参数 MBSFN-SubframeConfig或者 系统信息块 13 ( SIB13 )将转配置的 MBSFN子帧的配置信令发送给 UE。 上述方法中， 所述的处理为：In the above method, the configuration signaling for transmitting the configured MBSFN subframe to the UE is: the base station transmitting the configured MBSFN by using the parameter MBSFN-SubframeConfig or the system information block 13 (SIB13) in the system information block 2 (SIB2) The configuration signaling of the subframe is sent to the UE. In the above method, the processing is:
基站在转配置的 MBSFN子帧中不发送小区专用参考信号（CRS )； 或 在前一个或前两个正交频分复用 （OFDM )符号上发送所述 CRS , 并保持 剩余的 OFDM符号为空。 The base station does not transmit a cell-specific reference signal (CRS) in the configurable MBSFN subframe; or transmits the CRS on the previous or first two orthogonal frequency division multiplexing (OFDM) symbols, and keeps the remaining OFDM symbols as air.
上述方法中， 所述基站在转配置的 MBSFN子帧中不发送 CRS为： 基站将转配置的 MBSFN子帧的所有 OFDM 都保持为空， 转配置的 MBSFN子帧的前一个或者前两个 OFDM符号内都不发送 CRS, 并且不承 载物理混合 ARQ指示信道（ PHICH )、物理控制格式指示信道（ PCFICH )、 物理下行控制信道（PDCCH ) , 基站关闭射频。 In the above method, the base station does not send the CRS in the configured MBSFN subframe: the base station keeps all the OFDM of the transferred MBSFN subframe to be empty, and the previous or the first two OFDM of the configured MBSFN subframe The CRS is not transmitted within the symbol, and does not carry a Physical Hybrid ARQ Indicator Channel (PHICH), a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), and the base station turns off the radio.
上述方法中， 所述在前一个或前两个 OFDM符号上发送所述 CRS, 并 保持剩余的 OFDM符号为空为： In the above method, the CRS is sent on the previous or first two OFDM symbols, and the remaining OFDM symbols are kept empty:
基站在转配置的 MBSFN子帧的前一个或前两个 OFDM符号上发送 CRS, 并且承载 PHICH、 PCFICH, PDCCH, 剩余的 OFDM符号上不发送 CRS,也不发送 MBSFN参考信号和多媒体广播组播业务数据，保持剩余的 OFDM符号为空， 基站在剩余的空的 OFDM符号上关闭射频。 The base station sends the CRS on the previous or first two OFDM symbols of the forward-configured MBSFN subframe, and carries the PHICH, the PCFICH, the PDCCH, does not send the CRS on the remaining OFDM symbols, and does not send the MBSFN reference signal and the multimedia broadcast multicast service. Data, keeping the remaining OFDM symbols empty, the base station turns off the radio on the remaining empty OFDM symbols.
上述方法中， 该方法还包括： In the above method, the method further includes:
基站不发送转配置的 MBSFN子帧的配置信令给多小区协调实体。 本发明还提供了一种子帧配置系统， 包括： 基站、 用户设备； 其中， 基站， 用于将单播子帧转配置为 MBSFN子帧， 并将转配置的 MBSFN 子帧的配置信令发送给用户设备,之后，对转配置的 MBSFN子帧进行处理； 用户设备， 用于接收基站发送的转配置的 MBSFN子帧的配置信令。 上述系统中， 所述基站，还用于将 UE的数据集中调度在一个或者多个 单播子帧内发送给 UE; 根据单播业务的数据量判断是否出现空闲的单播子 帧， 当一段时间内在一个或者多个单播子帧内的用户的数据量一直保持不 变时，确定剩余的单播子帧是空闲的单播子帧；在转配置的 MBSFN子帧中 不发送 CRS; 或在前一个或前两个 OFDM符号上发送所述 CRS, 并保持剩 余的 OFDM符号为空。The base station does not send configuration signaling of the transferred configured MBSFN subframe to the multi-cell coordination entity. The present invention further provides a seed frame configuration system, including: a base station, a user equipment; wherein, the base station is configured to configure a unicast subframe to be an MBSFN subframe, and send configuration signaling of the configured MBSFN subframe to The user equipment is configured to process the configured MBSFN subframes; and the user equipment is configured to receive configuration signaling of the configured MBSFN subframes sent by the base station. In the above system, the base station is further configured to: perform centralized scheduling of data of the UE in one or more unicast subframes, and send the data to the UE according to the data volume of the unicast service, and determine whether an idle unicast subframe occurs. Determining that the remaining unicast subframe is an idle unicast subframe when the amount of data of the user in the one or more unicast subframes remains unchanged; in the configured MBSFN subframe The CRS is not transmitted; or the CRS is transmitted on the previous or first two OFDM symbols, and the remaining OFDM symbols are left empty.
本发明提供的实现子帧配置方法及系统， 将空闲的单播子帧转配置为 MBSFN子帧， 被转配置为 MBSFN子帧的子帧不再继续发送小区专用参考 信号， 或者仅仅在前一个或者前两个正交频分复用符号内发送小区专用参 考信号， 从而使基站可以关闭射频， 达到省电节能的目的； 而且， 利用本 发明提出的调度原则， 可以使得基站存在空闲的单播子帧的机会增大， 尽 可能的实现基站省电节能。 The method and system for implementing a subframe configuration provided by the present invention converts an idle unicast subframe into an MBSFN subframe, and the subframe that is configured to be an MBSFN subframe does not continue to transmit a cell-specific reference signal, or only in the previous one. Or transmitting the cell-specific reference signal in the first two orthogonal frequency division multiplexing symbols, so that the base station can turn off the radio frequency to save power and save energy; and, by using the scheduling principle proposed by the present invention, the base station can have idle unicast The chance of sub-frames increases, and the base station saves energy and energy as much as possible.
此外，本发明中基站拥有对转配置的 MBSFN子帧的支配权利，利用该 支配权利， 当基站发送 MBMS时， 基站有权利随时将转配置的 MBSFN子 帧再次配置为单播子帧， 利用配置后的单播子帧传输单播业务数据， 这样 缩短了基站将单播子帧和 MBSFN子帧之间转换的时间，提高转配置过程的 效率， 同时还可以方便基站根据需要对 MBSFN子帧和单播子帧进行转换， 发送不同的业务数据。 附图说明 In addition, in the present invention, the base station has the right to control the MBSFN subframe of the configuration, and the base station has the right to reconfigure the configured MBSFN subframe as a unicast subframe at any time when the base station transmits the MBMS. The unicast sub-frame transmits the unicast service data, which shortens the time for the base station to convert between the unicast sub-frame and the MBSFN sub-frame, improves the efficiency of the transfer configuration process, and also facilitates the base station to perform MBSFN sub-frames according to requirements. Unicast subframes are converted to send different service data. DRAWINGS
图 1为本发明实现子帧配置方法的流程示意图； 1 is a schematic flowchart of a method for configuring a subframe according to the present invention;
图 2为本发明基站将数据集中调度在一个或者多个单播子帧内发送给 UE的一实施例流程示意图； 2 is a schematic flowchart of an embodiment of a base station that schedules data to be sent to a UE in one or more unicast subframes according to an embodiment of the present invention;
图 3为本发明实现子帧配置系统的结构示意图。 具体实施方式 FIG. 3 is a schematic structural diagram of a subframe configuration system according to the present invention. detailed description
本发明的基本思想是： 基站将单播子帧转配置为多媒体广播组播业务 单频网络 ( MBSFN, Multimedia Broadcast multicast service Single Frequency Network )子帧， 之后， 所述基站将转配置的 MBSFN子帧的配置信令发送 给用户设备（UE, User Equipment ) 。 下面通过附图及具体实施例对本发明再做进一步的详细说明。The basic idea of the present invention is: the base station converts the unicast subframe into a multimedia broadcast multicast service single frequency network (MBSFN) subframe, and then the base station converts the configured MBSFN subframe. The configuration signaling is sent to the user equipment (UE, User Equipment). The invention will be further described in detail below with reference to the drawings and specific embodiments.
在 LTE中有两种子帧： 一种是 MBSFN子帧， 另一种是非 MBSFN子 帧； 其中， 非 MBSFN子帧一般用于传输单播业务数据（也称单播子帧）， 每个子帧中都发送小区专有参考信号 （ CRS , Cell-specific Reference Signals ),根据相关协议的规定，即使没有单播业务数据时也需要发送 CRS; MBSFN 子帧主要用于传输多媒体广播组播业务 （ MBMS , Multimedia Broadcast Multicast Service ), 其中少量的 MBSFN子帧还用于传输其它业 务，例如定位业务等； MBSFN子帧结构为： 在 LTE R8/9/10中规定 MBSFN 共有 12 个正交频分复用 ( OFDM , Orthogonal Frequency Division Multiplexing )符号， 其中子帧前一个或者前两个 OFDM符号用于 7 载物理 下行控制信道（ PDCCH, Physical Downlink Control Channel )和其他一些物 理信道， 子帧中剩余的 OFDM符号用于传输 MBMS , 其中 MBSFN子帧前 一个或者前两个 OFDM符号内发送 CRS , 当 MBSFN子帧的物理多播信道 ( PMCH, Physical Multicast Channel )被调度用于发送 MBMS 时， 在该 MBSFN子帧的 PMCH中发送 MBSFN参考信号， 不发送 CRS。 There are two types of subframes in LTE: one is an MBSFN subframe, and the other is a non-MBSFN subframe. The non-MBSFN subframe is generally used to transmit unicast service data (also called unicast subframe), in each subframe. Both transmit Cell-specific Reference Signals (CRS), according to the relevant protocol, need to send CRS even if there is no unicast service data; MBSFN subframe is mainly used to transmit multimedia broadcast multicast service (MBMS, Multimedia Broadcast Multicast Service ), where a small number of MBSFN subframes are also used for transmitting other services, such as positioning services; MBSFN subframe structure is: LTE R8/9/10 specifies that MBSFN has 12 orthogonal frequency division multiplexing ( OFDM (Orthogonal Frequency Division Multiplexing) symbol, where the first or the first two OFDM symbols of the subframe are used for a 7-carrier Physical Downlink Control Channel (PDCCH) and some other physical channels, and the remaining OFDM symbols in the subframe are used. For transmitting MBMS, where CRS is transmitted in the first or first two OFDM symbols of the MBSFN subframe, when the MBSFN subframe is Multicast channel (PMCH, Physical Multicast Channel) scheduled for transmission when the MBMS, transmits the PMCH in the MBSFN reference signal in the MBSFN subframe, does not transmit CRS.
通过对 LTE的现有技术进行分析，可以获知， CRS是在每个非 MBSFN 传输的下行子帧中都发送的，也就是说， 即使在某个非 MBSFN传输的下行 子帧中没有单播业务数据被发送，但是 CRS仍然需要被发送， 因为 CRS还 有供 UE进行测量的作用。 By analyzing the existing technology of LTE, it can be known that the CRS is transmitted in each downlink subframe of the non-MBSFN transmission, that is, even in the downlink subframe of a non-MBSFN transmission, there is no unicast service. The data is sent, but the CRS still needs to be sent because the CRS also has the effect of the UE making measurements.
殳设在上述的某个非 MBSFN传输的下行子帧中没有发送 CRS, 并且 网络侧也没有通知 UE, 所述下行子帧中没有发送 CRS , 那么 UE会因为在 所述下行子帧上接收不到 CRS , 而认为自己接收信息失败， 从而导致 UE 测量失败。 当 UE的信道质量下降时， UE会以为自己目前位于小区边缘， 所以需要进行邻小区信道质量测量， 主要测量邻小区的信道质量， 用来判 断是否需要进行信道切换等。 本发明提供一种子帧配置方法， 图 1 是本发明实现子帧配置方法的流 程示意图， 如图 1所示， 该方法包括以下步骤：If the CRS is not sent in the downlink subframe of the non-MBSFN transmission, and the network side does not notify the UE, and the CRS is not sent in the downlink subframe, the UE may not receive the downlink subframe. Going to the CRS and thinking that it failed to receive the information, resulting in UE measurement failure. When the channel quality of the UE is degraded, the UE considers that it is currently located at the cell edge. Therefore, it is necessary to perform channel quality measurement of the neighboring cell, and mainly measure the channel quality of the neighboring cell, and determine whether channel switching needs to be performed. The present invention provides a method for configuring a subframe. FIG. 1 is a schematic flowchart of a method for configuring a subframe according to the present invention. As shown in FIG. 1, the method includes the following steps:
步骤 101 ,基站将数据集中调度在一个或者多个单播子帧内发送给 UE; 具体的， 基站通过调度原则， 将用户设备的数据集中调度在一个或者 多个单播子帧内发送给 UE; 当用户设备较少且用户设备的数据量较少时， 一个或者多个子帧就可以实现用户设备的数据传输， 剩余的单播子帧就可 以保持较长时间的空闲， 基站通过调度原则提升小区内出现空闲的单播子 帧的概率； 用户设备的数据主要是用户设备的单播业务数据。 Step 101: The base station schedules the data in one or more unicast subframes and sends the data to the UE. Specifically, the base station schedules the data of the user equipment in one or more unicast subframes and sends the data to the UE. When the number of user equipments is small and the amount of data of the user equipment is small, one or more subframes can implement data transmission of the user equipment, and the remaining unicast subframes can be idle for a long time, and the base station improves by scheduling principles. The probability of an idle unicast subframe appears in the cell; the data of the user equipment is mainly the unicast service data of the user equipment.
步骤 102, 判断是否出现空闲的单播子帧， 如果是， 则执行步骤 103 , 如果不是， 则执行步骤 101 ; Step 102, it is determined whether an idle unicast subframe occurs, and if yes, step 103 is performed; if not, step 101 is performed;
具体的， 基站根据单播业务的数据量判断是否出现空闲的单播子帧， 方法如下： 因为基站将数据集中调度在一个或者多个单播子帧内并发送， 所以如果一段时间内在一个或者多个单播子帧内的用户设备的数据量一直 保持不变， 就可以将剩余的单播子帧看作是空闲的单播子帧； 此外， 基站 可以在一些用户较少的特定时间段内釆用该方案， 例如每天的 0: 00至 6: 00, 由于这个时间段内小区内通话的用户比较少， 出现空闲的单播子帧的 概率较大； 如果出现空闲的单播子帧， 则执行步骤 103 , 如果没有出现单播 子帧， 则执行步骤 101。 Specifically, the base station determines, according to the data volume of the unicast service, whether an idle unicast subframe occurs, as follows: Because the base station schedules the data in one or more unicast subframes and sends the data, if the one time is within one or The amount of data of the user equipment in the multiple unicast subframes remains unchanged, and the remaining unicast subframes can be regarded as idle unicast subframes. In addition, the base station can be in a certain period of time when some users are less. The scheme uses, for example, 0: 00 to 6: 00 every day, because there are fewer users in the cell during this time period, the probability of appearing idle unicast subframes is greater; if idle unicast subframes appear Then, step 103 is performed. If no unicast subframe occurs, step 101 is performed.
步骤 103 , 基站将单播子帧转配置为 MBSFN子帧； Step 103: The base station converts the unicast subframe into an MBSFN subframe.
具体的， 这里， 基站通过步骤 101 的调度之后， 将空闲的单播子帧转 配置为 MBSFN子帧； 基站通过系统信息块 2 ( SIB2, System Information Block 2 )上的参数 MBSFN-SubframeConfig来将空闲的单播子帧转配置为 MBSFN子帧， 直接利用 SIB2把配置信息发送给 UE; Specifically, after the base station performs the scheduling of step 101, the idle unicast subframe is configured to be an MBSFN subframe; the base station uses the parameter MBSFN-SubframeConfig on the system information block 2 (SIB2, System Information Block 2) to idle. The unicast subframe is configured to be an MBSFN subframe, and the configuration information is directly sent to the UE by using the SIB2;
在 LTE中， 频分双工 （FDD , Frequency Division Duplex )模式下, 单 播子帧中能够转配置为 MBSFN子帧的是子帧号为 #1、 #2、 #3、 #6、 #7、 #8 的下行子帧， 时分双工 （TDD , Time Division Duplex )模式下， 单播子帧 中能够转配置为 MBSFN子帧的子帧为子帧号是 #0、 #4、 #5、 #9的下行子 帧。In LTE, in the frequency division duplex mode (FDD), the subframe numbers that can be configured as MBSFN subframes in the unicast subframe are #1, #2, #3, #6, #7. , #8 The downlink subframe, in the time division duplex (TDD) mode, the subframes that can be configured to be MBSFN subframes in the unicast subframe are subframe numbers #0, #4, #5, #9. Downstream subframe.
步骤 104, 基站将转配置的 MBSFN子帧的配置信令发送给 UE; Step 104: The base station sends configuration signaling of the configured MBSFN subframe to the UE.
具体的，基站将空闲的单播子帧转配置为 MBSFN子帧后，基站将转配 置的 MBSFN子帧的配置信令通过 SIB2或者 SIB13发送给 UE; 该配置信 令的内容是哪些单播子帧被转配置为 MBSFN子帧；通过该配置信令，基站 告知 UE被转配置为 MBSFN子帧的单播子帧； 在实际应用中，基站在将转 配置的 MBSFN子帧的配置信令发送给 UE时，还发送小区自身原本就配置 的 MBSFN子帧； Specifically, after the base station converts the idle unicast subframe into the MBSFN subframe, the base station sends the configured signaling of the configured MBSFN subframe to the UE through the SIB2 or the SIB13; the content of the configuration signaling is unicast. The frame is configured to be an MBSFN subframe. The base station informs the UE that the UE is configured to be a unicast subframe of the MBSFN subframe. In an actual application, the base station sends the configuration signaling of the configured MBSFN subframe. When the UE is sent to the UE, the MBSFN subframe that the cell itself originally configured is also sent;
这里，如果小区自身原本就有 MBSFN子帧， 那么这些 MBSFN子帧是 小区协议实体 ( MCE, Multi-cell/multicast Coordination Entity ) 配置后 4巴配 置信令发送给基站的。 Here, if the cell itself has an MBSFN subframe, the MBSFN subframes are configured by the MCE (Multi-cell/Multicast Coordination Entity) to be sent to the base station.
在实际应用中，基站对于转配置的 MBSFN子帧，可以保持该子帧的循 环前缀（CP, Cyclic Prefix ) 不变， 仅仅将这些子帧称为 MBSFN子帧， 让 LTE早期版本的 UE (例如 LTE R8或者 R9或者 R10 ) 的 UE知道该子帧 是 MBSFN子帧即可， 因为如果是单播的 UE不会在这些 MBSFN子帧的 PMCH中进行测量的， 所以就可以在转配置的 MBSFN子帧中不发送 CRS, 并且不传输单播业务给 UE。 In practical applications, the base station can keep the cyclic prefix (CP, Cyclic Prefix) of the subframe unchanged for the MBSFN subframe that is configured, and only refer to these subframes as MBSFN subframes, so that UEs of earlier versions of LTE (for example) The UE of LTE R8 or R9 or R10) knows that the subframe is an MBSFN subframe, because if the unicast UE does not measure in the PMCH of these MBSFN subframes, the MBSFN sub-config can be transferred. The CRS is not transmitted in the frame, and the unicast service is not transmitted to the UE.
步骤 105 ,基站在转配置的 MBSFN子帧中不发送 CRS, 或者在前一个 或前两个 OFDM符号上发送 CRS , 并保持剩余的 OFDM符号为空； Step 105: The base station does not send the CRS in the transferred MBSFN subframe, or sends the CRS on the previous or the first two OFDM symbols, and keeps the remaining OFDM symbols empty;
具体的， 基站将转配置的 MBSFN子帧的所有 OFDM都保持为空， 其 中 OFDM符号保持为空的意思是基站该 OFDM符号中不发送任何数据信 息， 转配置的 MBSFN 子帧的前一个或者前两个 OFDM符号内都不发送 CRS,并且不 载物理控制格式指示信道 ( PCFICH, Physical Control Format Indicatou Channel )、物理混合 ARQ指示信道 ( PHICH,Physical Hybrid ARQ Indicator Channel )、物理下行控制信道 ( PDCCH, Physical Downlink Control Channel ) ,从而在转配置的 MBSFN子帧内会出现连续的空的 OFDM符号 , 基站在 OFDM符号为空时， 关闭射频，可省电节能； 此时，在 FDD模式下， UE优先使用单播子帧中的下行子帧 #0、 #4、 #5、 #9中的 CRS进行测量， 因为本实施例中不会将下行子帧 #0、 #4、 #5、 #9转配置为 MBSFN子帧， 此外 UE也可以使用单播子帧中的下行子帧 #1、 #2、 #3、 #6、 #7、 #8中没 有被转配置为 MBSFN子帧的单播子帧中的 CRS进行测量；Specifically, the base station keeps all OFDMs of the configured MBSFN subframes to be empty, where the OFDM symbols remain empty, that is, the base station does not send any data information in the OFDM symbols, and the previous or the former of the configured MBSFN subframes CRS is not transmitted in both OFDM symbols, and does not carry a physical control format indication channel (PCFICH, Physical Control Format Indicatou Channel), a Physical Hybrid ARQ Indicator Channel (PHICH), and a Physical Downlink Control Channel (PDCCH), so that consecutive empty OFDM symbols appear in the configured MBSFN subframe. When the OFDM symbol is empty, the base station turns off the radio, which saves power and saves energy. At this time, in the FDD mode, the UE preferentially uses the CRS in the downlink subframes #0, #4, #5, #9 in the unicast subframe. The measurement is performed, because the downlink subframes #0, #4, #5, and #9 are not configured as MBSFN subframes in this embodiment, and the UE may also use the downlink subframes #1 and # in the unicast subframe. 2. The CRSs in the unicast subframes that are not configured to be MBSFN subframes are not measured in #3, #6, #7, and #8;
因为转配置的 MBSFN子帧不发送任何信息，对于一个小区而言， 当小 区内的用户设备的数量和用户设备的数据量较少时， 基站通过配置图样， 实现单播业务的正常传输； 具体方法是： UE给基站发送数据的上行子帧， 需要进行一些限制， 这个限制简单地说就是， 当小区用户设备的数量和用 户设备的数据量较少时，基站可以调度 UE在约定的上行子帧进行传输，具 体约定由基站配置；通过基站配置转配置 MBSFN子帧的图样来实现基站根 据 UE上行数据的反馈信息发送的规则，基站总能恰好在一个下行单播子帧 上将反馈信息发送给 UE, 即： 基站配置一个满足上下行数据传输且满足多 次上行重传的图样， 把图样中用到的下行子帧不转配置为 MBSFN子帧即 可； Because the configured MBSFN subframe does not send any information, for a cell, when the number of user equipments in the cell and the amount of data of the user equipment are small, the base station implements normal transmission of the unicast service by configuring the pattern; The method is as follows: The UE sends an uplink subframe of the data to the base station, and needs to perform some restrictions. The limitation is simply that when the number of cell user equipments and the amount of data of the user equipment are small, the base station may schedule the UE to be in the agreed uplink. The frame is transmitted, and the specific agreement is configured by the base station; the base station configures the configuration of the MBSFN subframe to implement the rule that the base station sends the feedback information according to the uplink data of the UE, and the base station can always send the feedback information on a downlink unicast subframe. For the UE, that is, the base station configures a pattern that satisfies the uplink and downlink data transmission and satisfies the multiple uplink retransmissions, and configures the downlink subframe used in the pattern to be an MBSFN subframe;
或者， 基站在转配置的 MBSFN子帧的前一个或者前两个 OFDM符号 上发送 CRS, 并且承载 PHICH、 PCFICH、 PDCCH, 剩余的 OFDM符号上 不发送 CRS, 同时也不发送 MBSFN参考信号和 MBMS数据， 保持剩余的 OFDM符号为空； 这样基站可以在剩余的连续多个空的 OFDM符号上关闭 射频， 达到省电节能的目的； MBSFN参考信号是协议规定的 PMCH中传 输 MBMS业务时， 配置发送的 CRS。 Or, the base station sends the CRS on the previous or first two OFDM symbols of the configured MBSFN subframe, and carries the PHICH, the PCFICH, and the PDCCH, does not send the CRS on the remaining OFDM symbols, and does not send the MBSFN reference signal and the MBMS data. Keeping the remaining OFDM symbols empty; in this way, the base station can turn off the radio on the remaining consecutive empty OFDM symbols to save power and save energy; the MBSFN reference signal is configured to transmit the MBMS service in the PMCH specified by the protocol. CRS.
这样按照上述步骤处理后，可以达到基站在转配置的 MBSFN子帧中节 能， 因为基站在转配置的 MBSFN子帧中不发送 CRS , 也不发送单播数据， 更不会发送 MBMS业务。 基站的处理也不会影响不同版本的 UE, 例如， 对于接收单播业务的 UE, 不会在 MBSFN子帧的 PMCH (也就是 MBSFN 子帧的 MBSFN域）中进行测量， 所以没有 CRS发送并不影响其正常工作， 对于接收 MBMS业务的 UE, 可以通过 MBMS业务的调度信息知道哪些 MBSFN子帧中有 MBMS业务， 所以接收 MBMS业务的 UE将会发现基站 转配置的 MBSFN子帧都是没有 MBMS业务的， 所以这些 UE也不会在基 站转配置的 MBSFN子帧中接收 MBMS业务， 所以不影响这类 UE的正常 工作。 综上所述， 本发明实施例在不影响 UE正常工作的情况下， 通过基站 自主把一些单播子帧转配置为 MBSFN 子帧， 并且利用 SIB2 中的 MBSFN-SubframeConfig 配置参数通知 UE 后， 基站就可以在转配置的 MBSFN子帧中不发送 CRS或者仅在这些 MBSFN子帧的前 1 个或 2个 OFDM符号中发送 CRS , 其他 OFDM符号中不发 CRS , 不调度 UE数据和 MBMS业务， 从而基站关闭射频可以很好的实现基站节能。After the above steps are processed, the base station can reach the section of the MBSFN subframe in the configuration. Yes, because the base station does not send CRS in the configured MBSFN subframe, does not send unicast data, and does not send MBMS services. The processing of the base station does not affect different versions of the UE. For example, for the UE receiving the unicast service, the measurement is not performed in the PMCH of the MBSFN subframe (that is, the MBSFN domain of the MBSFN subframe), so there is no CRS transmission. The UE that receives the MBMS service can know which MBSFN subframes have MBMS services through the scheduling information of the MBMS service. Therefore, the UE receiving the MBMS service will find that the MBSFN subframes configured by the base station are not MBMS services. Therefore, these UEs do not receive the MBMS service in the MBSFN subframe configured by the base station, so the normal operation of such UE is not affected. In summary, the embodiment of the present invention does not affect the normal operation of the UE, and the base station autonomously converts some unicast subframes into MBSFN subframes, and notifies the UE by using the MBSFN-SubframeConfig configuration parameter in the SIB2, the base station It is possible to not transmit CRS in the forward-configured MBSFN subframe or transmit the CRS only in the first one or two OFDM symbols of the MBSFN subframes, and do not send CRS in other OFDM symbols, and do not schedule UE data and MBMS services, thereby The base station can close the radio to achieve good energy saving of the base station.
该方法还可以包括以下步骤： The method can also include the following steps:
步骤 106, 基站不发送转配置的 MBSFN子帧信息给 MCE; Step 106: The base station does not send the configured MBSFN subframe information to the MCE.
现有技术中， 承载 MBMS业务的 MBSFN子帧是由 MCE配置的， 将 配置信息发送给相关基站。如果基站将转配置的 MBSFN子帧发送给 MCE, 这样 MCE就可以知道基站将哪些单播子帧转配置为 MBSFN子帧，当 MCE 发现一定范围内所有基站的空闲的单播子帧相同， 且存在需要发送的 MBMS业务需求时， MCE可利用转配置的 MBSFN子帧发送 MBMS ,此时， 基站如果再次想将被 MCE利用的转配置的 MBSFN子帧配置为单播子帧 时， 就必须与 MCE交互， 告知 MCE将转配置的 MBSFN子帧上的 MBMS 业务释放,基站再根据需要将转配置的 MBSFN子帧配置为单播子帧发送单 播业务， 但基站与 MCE之间交互是比较緩慢的， 不利于基站的灵活配置， 并影响发送转配置的 MBSFN子帧的稳定性；In the prior art, the MBSFN subframe that carries the MBMS service is configured by the MCE, and the configuration information is sent to the relevant base station. If the base station sends the configured MBSFN subframe to the MCE, the MCE can know which unicast subframes of the base station are configured to be MBSFN subframes, and the MCE discovers that all the idle unicast subframes of all the base stations in a certain range are the same, and When there is a need for the MBMS service to be transmitted, the MCE can transmit the MBMS using the configured MBSFN subframe. In this case, if the base station again wants to configure the configured MBSFN subframe used by the MCE as a unicast subframe, it must The MCE interacts, and informs the MCE to release the MBMS service on the configured MBSFN subframe. The base station then configures the configured MBSFN subframe as a unicast sub-frame to transmit the unicast service, but the interaction between the base station and the MCE is slow. Not conducive to the flexible configuration of the base station, And affecting the stability of the MBSFN subframe that is sent to the configuration;
而本发明基站不发送转配置的 MBSFN子帧信息给 MCE, 这样基站就 拥有对这些转配置的 MBSFN子帧的支配权利，利用该支配权利，基站有权 利随时将这些 MBSFN子帧再次配置为单播子帧 ,利用配置后的单播子帧传 输单播业务数据，如此可缩短基站将单播子帧和转配置的 MBSFN子帧进行 相互转换的时间， 减少再配置过程的时间， 提高实现效率； 同时还可以方 便基站根据需要对转配置的 MBSFN子帧和单播子帧进行转换，发送不同的 业务数据，或者利用转配置的 MBSFN子帧发送其他业务，例如基站可以在 转配置的 MBSFN子帧中发送单小区模式的 MBMS业务。 The base station of the present invention does not send the configured MBSFN subframe information to the MCE, so that the base station has the right to control the MBSFN subframes of the forwarding configuration. With the dominant right, the base station has the right to configure the MBSFN subframes as a single at any time. The unicast service data is transmitted by using the configured unicast subframe, so that the time for the base station to convert the unicast subframe and the configurable MBSFN subframe to each other is shortened, the reconfiguration process time is reduced, and the implementation efficiency is improved. At the same time, it is also convenient for the base station to convert the configured MBSFN subframe and the unicast subframe according to the requirements, and send different service data, or use the configured MBSFN subframe to send other services, for example, the base station can be configured in the MBSFN sub-configuration. The MBMS service in the single cell mode is transmitted in the frame.
为了尽可能的实现基站节能， 本发明提出一种调度方法， 在该调度方 法中基站需要将小区内的用户设备的数据调度在一个或者多个单播子帧内 发送数据给 UE。 当用户设备的数据量较小时， 就集中在一个单播子帧内调 度， 如果用户设备的数据量较多时， 先在一个单播子帧内调度， 如果一个 单播子帧不够使用时， 再在第二个单播子帧内进行调度。 In order to achieve the energy saving of the base station as much as possible, the present invention provides a scheduling method in which the base station needs to schedule data of the user equipment in the cell to transmit data to the UE in one or more unicast subframes. When the amount of data of the user equipment is small, it is scheduled to be scheduled in one unicast subframe. If the amount of data of the user equipment is large, it is first scheduled in a unicast subframe. If a unicast subframe is not enough, Scheduling within the second unicast subframe.
图 2是图 1 中基站将数据集中调度在一个或者多个单播子帧内发送给 UE的一具体实施例的实现方法， 如图 2所示， 该方法包括以下步骤： 步骤 201 , 基站将数据集中在下行子帧 #0和 #5中调度； 2 is a schematic implementation of a specific embodiment of the base station in FIG. 1 for scheduling data to be sent to a UE in one or more unicast subframes. As shown in FIG. 2, the method includes the following steps: Step 201: A base station will The data is concentrated in the downlink subframes #0 and #5 for scheduling;
具体的， 本实施例中， 基站优先将用户设备的数据集中在单播子帧的 下行子帧 #0、 #4、 #5和 #9中进行调度， 这是因为本发明中， 在 FDD模式 下， 不会将下行子帧 #0、 #4、 #5和 #9转配置为 MBSFN子帧； 一般， 先使 用下行子帧 #0和 #5 , 即： 基站将用户设备的数据集中在下行子帧 #0和 #5中 调度。 Specifically, in this embodiment, the base station preferentially concentrates the data of the user equipment in the downlink subframes #0, #4, #5, and #9 of the unicast subframe for scheduling, because in the present invention, in the FDD mode. The downlink subframes #0, #4, #5, and #9 are not configured as MBSFN subframes. Generally, the downlink subframes #0 and #5 are used first, that is, the base station concentrates the data of the user equipment on the downlink. Scheduling in subframes #0 and #5.
步骤 202, 当下行子帧 #0和 #5的资源不够传输小区内的单播业务时， 使用下行子帧 #4和 #9; Step 202: When the resources of the downlink subframes #0 and #5 are insufficient to transmit the unicast service in the cell, the downlink subframes #4 and #9 are used.
具体的， 当 #0和 #5子帧的资源不够使用时， 可以先使用下行子帧 #9, 当 #0、 #5和 #9的资源不够使用时， 使用下行子帧 #4。Specifically, when the resources of the #0 and #5 subframes are insufficient, the downlink subframe #9 may be used first. When the resources of #0, #5, and #9 are not enough, the downlink subframe #4 is used.
步骤 203 , 当 #0、 #4、 #5和 #9的资源够传输小区内的单播业务， 即资 源够用时， 其他子帧被空闲； 当 #0、 #4、 #5和 #9的资源不够传输小区内的 单播业务， 即资源不够用时， 增加子帧； Step 203: When the resources of #0, #4, #5, and #9 are sufficient to transmit the unicast service in the cell, that is, when the resource is sufficient, other subframes are idle; when #0, #4, #5, and #9 The resources are insufficient to transmit the unicast service in the cell, that is, when the resources are insufficient, the subframe is added;
具体的， 当小区内的用户设备的数量和用户设备的数据量较少时， 对 于一个小区而言， 下行子帧 #0、 #4、 #5和 #9足够满足小区内单播业务的传 输时， 小区内其他的单播子帧将被空闲； Specifically, when the number of user equipments in the cell and the data volume of the user equipment are small, for one cell, the downlink subframes #0, #4, #5, and #9 are sufficient to satisfy the transmission of the unicast service in the cell. When other unicast subframes in the cell will be idle;
当下行子帧 #0、 #4、 #5和 #9的资源不够传输小区内的单播业务时， 增 加单播子帧的下行子帧 #1、 #2、 #3、 #6、 #7和 #8中的子帧， 基站在调度时， 尽可能的把单播子帧连续起来。 When the resources of the downlink subframes #0, #4, #5, and #9 are insufficient to transmit the unicast service in the cell, the downlink subframes #1, #2, #3, #6, #7 of the unicast subframe are added. With the subframes in #8, the base station keeps the unicast subframes as continuous as possible during scheduling.
该方法针对与 LTE中的 FDD模式， 对于 TDD模式与上述方法类似， 只是将下行子帧号 #0、 #4、 #5和 #9变为 #0、 #1、 #5和 #6。 The method is directed to the FDD mode in LTE, and the TDD mode is similar to the above method except that the downlink subframe numbers #0, #4, #5, and #9 are changed to #0, #1, #5, and #6.
利用这种调度原则， 当小区的用户设备的数量和用户设备的数据量较 少时， 小区内存在空闲的单播子帧， 基站把空闲的单播子帧转配置为 MBSFN子帧， 并将转配置的 MBSFN的配置信令发送给 UE; 基站在转配 置的 MBSFN 子帧中不发送小区专用参考信号， 或者在前一个或前两个 OFDM符号上发送小区专用参考信号， 并保持剩余的 OFDM符号为空， 从 而基站在 OFDM符号为空时， 关闭射频以实现省电节能。 With this scheduling principle, when the number of user equipments of the cell and the amount of data of the user equipment are small, there is an idle unicast subframe in the cell, and the base station configures the idle unicast subframe into an MBSFN subframe, and Transmitting the configuration signaling of the configured MBSFN to the UE; the base station does not transmit the cell-specific reference signal in the configured MBSFN subframe, or transmits the cell-specific reference signal on the previous or the first two OFDM symbols, and maintains the remaining OFDM The symbol is empty, so that when the OFDM symbol is empty, the base station turns off the radio to save power and save energy.
LTE早期的 UE (如 R8的 UE )遇到 MBSFN子帧时， 仅仅可以接收 MBSFN子帧的前一个或者前两个 OFDM符号上的信息，这样不会对 R8的 UE造成任何影响， 例如 R8的 UE的单播业务的发送和接收、 测量等； R9 的 UE遇到 MBSFN子帧时， 如果所述 UE是仅仅有单播业务的 R9的 UE, 那么仅仅可以接收 MBSFN子帧的前一个或者前两个 OFDM符号上的信息； 如果所述 UE正在接收 MBMS, 或者具有 MBMS能力的 UE, 就可以通过 多播控制信道 ( MCCH, Multicast Control Channel )信息和多播信道（ MCH, Multicast Channel ) 的调度信息 （MSI, MCH scheduling information )获知 MBSFN子帧中的信息是否需要接收，所以不会对 R9的 UE造成任何影响， 例如 R9 的 UE接收和发送单播业务， R9的 UE接收多播业务， 以及 R9的 UE的测量等。When an early UE of LTE (such as a UE of R8) encounters an MBSFN subframe, it can only receive information on the previous or first two OFDM symbols of the MBSFN subframe, so that it does not affect the UE of the R8, for example, R8. When the UE of the R9 encounters the MBSFN subframe, if the UE is the UE of the R9 having only the unicast service, only the previous or the former of the MBSFN subframe can be received. Information on two OFDM symbols; if the UE is receiving MBMS, or an MBMS capable UE, it can pass the Multicast Control Channel (MCCH) information and the Multicast Channel (MCH, The scheduling information (MSI, MCH scheduling information) of the multicast channel is used to know whether the information in the MBSFN subframe needs to be received, so it does not affect the UE of the R9. For example, the UE of the R9 receives and transmits the unicast service, and the UE of the R9 receives the information. Multicast service, and measurement of UE of R9, etc.
由于对于 R8/R9的 UE没有影响， 因此本发明的方案具有很好的兼容 性， 并且通过本具体实施例， 将空闲的单播子帧转配置为 MBSFN子帧后， 被转为 MBSFN子帧的子帧不再继续发送 CRS, 或者仅仅在前一个或者前 两个 OFDM符号内发送 CRS, 从而实现基站省电节能的目的。 The solution of the present invention has good compatibility, and the unicast subframe is configured to be an MBSFN subframe after being converted into an MBSFN subframe by using the specific embodiment. The subframe does not continue to transmit the CRS, or the CRS is transmitted only in the previous or the first two OFDM symbols, thereby achieving the purpose of saving energy and saving the base station.
本发明只针对将空闲的单播子帧转配置为 MBSFN子帧的情况，对于小 区中原来就配置的 MBSFN子帧仍按照现有的 LTE协议的规定处理。 The present invention is only applicable to the case where the idle unicast subframe is configured as an MBSFN subframe, and the MBSFN subframe originally configured in the cell is still processed according to the existing LTE protocol.
为实现上述方法， 本发明还提供了一种子帧配置系统， 如图 3 所示， 该系统包括基站 31、 用户设备 32: 其中， To implement the above method, the present invention further provides a seed frame configuration system. As shown in FIG. 3, the system includes a base station 31 and a user equipment 32:
基站 31 ,用于将单播子帧转配置为 MBSFN子帧，并将转配置的 MBSFN 子帧的配置信令发送给用户设备 32； The base station 31 is configured to configure the unicast subframe to be configured as an MBSFN subframe, and send configuration signaling of the configured MBSFN subframe to the user equipment 32.
用户设备 32,用于接收基站 31发送的转配置的 MBSFN子帧的配置信 令； The user equipment 32 is configured to receive a configuration signal of the forward configured MBSFN subframe sent by the base station 31.
基站 31 , 还用于根据调度原则将数据集中调度在一个或者多个单播子 帧内发送给用户设备 32; 根据单播业务的数据量判断是否出现空闲的单播 子帧， 当一段时间内在一个或者多个单播子帧内的用户设备的数据量一直 保持不变， 就认为剩余的单播子帧是空闲的单播子帧； 在转配置的 MBSFN 子帧中不发送 CRS, 保持所有的 OFDM符号为空； 或者在前一个或前两个 OFDM符号上发送所述 CRS, 并保持剩余的 OFDM符号为空。 The base station 31 is further configured to, according to the scheduling principle, centrally schedule data to be sent to the user equipment 32 in one or more unicast subframes; determine whether an idle unicast subframe occurs according to the data volume of the unicast service, when the unicast subframe is idle for a period of time. The amount of data of the user equipment in one or more unicast subframes remains unchanged, and the remaining unicast subframes are considered to be idle unicast subframes; CRS is not sent in the configured MBSFN subframes, and all are kept. The OFDM symbol is empty; or the CRS is transmitted on the previous or first two OFDM symbols and the remaining OFDM symbols are left empty.
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等， 均应包含在本发明的保护范围之内。 The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.