技术领域technical field
本发明涉及移动通信技术领域，尤其是涉及一种为家庭基站配置测量时间的方法及其装置、一种为家庭基站配置测量周期的方法及其装置、一种为家庭基站配置测量时间起始位置的方法及其装置。The present invention relates to the field of mobile communication technology, in particular to a method and device for configuring measurement time for a home base station, a method and device for configuring a measurement period for a home base station, and a method for configuring a measurement time start position for a home base station method and device thereof.
背景技术Background technique
家庭基站是一种新型基站，主要是面向家庭市场，由用户来购买和安装的小型基站设备。由于家庭基站的随意性部署将会引入一定的干扰，为了抑制干扰、提高系统的性能，需要为家庭基站配置一定的测量时间(Measurement gap)，以对周围的无线环境进行定期检测，以选择合适的工作频率和发射功率。A femtocell is a new type of base station, which is mainly a small base station equipment purchased and installed by users for the home market. Since the random deployment of the home base station will introduce certain interference, in order to suppress the interference and improve the performance of the system, it is necessary to configure a certain measurement gap for the home base station to regularly detect the surrounding wireless environment to select the appropriate operating frequency and transmit power.
此外，对于TDD系统而言，由于上下行数据都是在相同的频率资源上传输，如果不能很好的进行网络同步将会引起宏基站和家庭基站，以及家庭基站之间的交叉时隙干扰(即基站干扰基站)，由此将会严重影响到系统的性能，由此可见同步是TDD系统正常运行的一个基本前提，由于家庭基站的部署环境及成本等因素的限制，往往很难直接通过接收GPS定位系统信号来进行同步，因此利用空中接口进行同步目前基本已成为TDD家庭基站的必选同步方案，而进行空口同步就要求家庭基站必须利用一定的测量时间去侦听周围的宏基站或家庭基站的下行同步信息、广播信息、导频信息等。In addition, for the TDD system, since the uplink and downlink data are transmitted on the same frequency resources, if the network synchronization cannot be performed well, it will cause cross-slot interference ( That is, the base station interferes with the base station), which will seriously affect the performance of the system. It can be seen that synchronization is a basic prerequisite for the normal operation of the TDD system. Due to the constraints of the deployment environment and cost of the home base station, it is often difficult to directly receive GPS positioning system signal for synchronization, so using the air interface for synchronization has basically become a necessary synchronization solution for TDD home base stations, and air interface synchronization requires the home base station to use a certain measurement time to listen to the surrounding macro base stations or home base stations Downlink synchronization information, broadcast information, pilot information, etc. of the base station.
综上可见，无论是抑制干扰还是进行网络同步，都需要为家庭基站配置一定的测量时间以对周围的无线环境进行测量。然而目前3GPP和Femto forum等标准化组织还尚未对如何为家庭基站配置测量时间和测量周期进行规定。To sum up, it can be seen that whether it is to suppress interference or perform network synchronization, it is necessary to configure a certain measurement time for the femtocell to measure the surrounding wireless environment. However, at present, standardization organizations such as 3GPP and Femto forum have not stipulated how to configure the measurement time and measurement period for the femtocell.
发明内容Contents of the invention
本发明实施例提供一种为家庭基站配置测量时间的方法及其装置，用以实现为家庭基站配置测量时间以对周围的无线环境进行测量。Embodiments of the present invention provide a method and device for configuring measurement time for a home base station, so as to configure measurement time for the home base station to measure the surrounding wireless environment.
本发明实施例还提供一种为家庭基站配置测量周期的方法及其装置、用以实现为家庭基站配置测量周期以对周围的无线环境进行测量。Embodiments of the present invention also provide a method and device for configuring a measurement cycle for a home base station, so as to configure a measurement cycle for the home base station to measure the surrounding wireless environment.
对应的，本发明实施例还提供一种为家庭基站配置测量时间起始位置的方法及其装置。Correspondingly, the embodiment of the present invention also provides a method and an apparatus thereof for configuring a measurement time start position for a home base station.
本发明实施例提供了一种为家庭基站配置测量时间的方法，包括：确定系统的上下行时隙比例配置信息；根据确定的上下行时隙比例配置信息，为家庭基站配置用于进行测量的测量时间长度。An embodiment of the present invention provides a method for configuring measurement time for a home base station, including: determining the uplink and downlink time slot ratio configuration information of the system; according to the determined uplink and downlink time slot ratio configuration information, configuring the home base station for measurement Measure the length of time.
对应的，本发明实施例还提供了一种为家庭基站配置测量时间的装置，包括用于确定系统的上下行时隙比例配置信息的单元；用于根据确定的上下行时隙比例配置信息，为家庭基站配置用于进行测量的测量时间长度的单元。Correspondingly, the embodiment of the present invention also provides a device for configuring the measurement time for the home base station, including a unit for determining the configuration information of the uplink and downlink time slot ratio of the system; for configuring the information according to the determined uplink and downlink time slot ratio, A unit for configuring a measurement time length for performing measurements is configured for the home base station.
本发明实施例还提供了一种为家庭基站配置测量周期的方法，包括确定家庭基站所要求的同步精度信息，以及确定家庭基站自身的晶振稳定度信息；根据确定的同步精度信息和晶振稳定度信息，为家庭基站配置用于进行测量的测量周期。The embodiment of the present invention also provides a method for configuring a measurement cycle for a home base station, including determining the synchronization accuracy information required by the home base station, and determining the crystal oscillator stability information of the home base station itself; according to the determined synchronization accuracy information and crystal oscillator stability information, configuring a measurement period for the home base station to perform measurement.
对应的，本发明实施例还提供了一种为家庭基站配置测量周期的装置，其包括：用于确定家庭基站所要求的同步精度信息的单元，以及用于确定家庭基站自身的晶振稳定度信息的单元；用于根据确定的同步精度信息和晶振稳定度信息，为家庭基站配置用于进行测量的测量周期的单元。Correspondingly, an embodiment of the present invention also provides a device for configuring a measurement period for a home base station, which includes: a unit for determining the synchronization accuracy information required by the home base station, and a unit for determining the crystal oscillator stability information of the home base station itself A unit; a unit configured to configure a measurement cycle for the home base station to perform measurement according to the determined synchronization accuracy information and crystal oscillator stability information.
本发明实施例还提供了一种为家庭基站配置测量时间起始位置的方法，包括：在测量用于对家庭基站进行同步的目标基站发送的待测下行参考信号过程中，依次对接收窗口内每个待测参考符号的径进行相关检测，得到第一个超过检测阈值的待测参考符号的径；将检测得到的待测参考符号的径在接收窗口内的起始时间位置，作为配置给家庭基站的测量时间的起始时间位置。The embodiment of the present invention also provides a method for configuring the starting position of the measurement time for the home base station, including: during the process of measuring the downlink reference signal to be measured sent by the target base station for synchronizing the home base station, sequentially measuring Correlation detection is performed on the path of each reference symbol to be tested, and the path of the first reference symbol to be tested that exceeds the detection threshold is obtained; The starting time position of the measurement time of the Femtocell.
对应的，本发明实施例还提供了一种为家庭基站配置测量时间起始位置的装置，包括：用于在测量用于对家庭基站进行同步的目标基站发送的待测下行参考信号过程中，依次对接收窗口内每个待测参考符号的径进行相关检测，得到第一个超过检测阈值的待测参考符号的径的单元；用于将检测得到的待测参考符号的径在接收窗口内的起始时间位置，作为配置给家庭基站的测量时间的起始时间位置的单元。Correspondingly, an embodiment of the present invention also provides an apparatus for configuring a measurement time start position for a home base station, including: during the process of measuring the downlink reference signal to be measured sent by the target base station for synchronizing the home base station, Correlation detection is performed on the path of each reference symbol to be tested in the receiving window in turn to obtain the unit of the path of the first reference symbol to be tested that exceeds the detection threshold; it is used to place the detected path of the reference symbol to be measured in the receiving window The start time position of is used as a unit configured for the start time position of the measurement time of the home base station.
本发明实施例还提供了一种为家庭基站配置测量时间起始位置的方法，包括：在测量用于对家庭基站进行同步的目标基站发送的待测下行参考信号过程中，分别对接收窗口内每个待测参考符号的径进行相关检测，得到检测结果最高的待测参考符号的径；将检测得到的待测参考符号的径在接收窗口内的起始时间位置，作为配置给家庭基站的测量时间的起始时间位置。The embodiment of the present invention also provides a method for configuring the start position of the measurement time for the home base station, which includes: during the process of measuring the downlink reference signal to be measured sent by the target base station for synchronizing the home base station, each Correlation detection is performed on the path of each reference symbol to be tested, and the path of the reference symbol to be tested with the highest detection result is obtained; the starting time position of the detected path of the reference symbol to be tested in the receiving window is used as the configuration for the home base station The starting time position for measuring time.
对应的，本发明实施例还提供了一种为家庭基站配置测量时间起始位置的装置，包括：用于在测量用于对家庭基站进行同步的目标基站发送的待测下行参考信号过程中，分别对接收窗口内每个待测参考符号的径进行相关检测，得到检测结果最高的待测参考符号的径的单元；用于将检测得到的待测参考符号的径在接收窗口内的起始时间位置，作为配置给家庭基站的测量时间的起始时间位置的单元。Correspondingly, an embodiment of the present invention also provides an apparatus for configuring a measurement time start position for a home base station, including: during the process of measuring the downlink reference signal to be measured sent by the target base station for synchronizing the home base station, Correlation detection is performed on the path of each reference symbol to be tested in the receiving window to obtain the unit of the path of the reference symbol to be tested with the highest detection result; it is used to place the detected path of the reference symbol to be tested at the starting point in the receiving window The time position is used as a unit configured for the start time position of the measurement time of the home base station.
本发明实施例提出根据系统的上下行时隙比例配置信息，为家庭基站配置用于对无线环境或空口环境进行测量的测量时间长度，从而实现为家庭基站配置测量时间以对周围的无线环境进行测量，并进而弥补标准化组织还尚未制定如何为家庭基站配置测量时间的方案的空白。此外本发明实施例提供的为家庭基站配置测量时间的方案可以在能够保证测量质量的情况下，节省资源开销，提高频谱资源的利用率和系统性能。The embodiment of the present invention proposes to configure the measurement time length for the home base station to measure the wireless environment or the air interface environment for the home base station according to the configuration information of the uplink and downlink time slot ratio of the system, so as to configure the measurement time for the home base station to measure the surrounding wireless environment measurement, and thus fill the gap that the standardization organization has not yet formulated how to configure the measurement time for the femtocell. In addition, the solution for configuring the measurement time for the home base station provided by the embodiment of the present invention can save resource overhead and improve spectrum resource utilization and system performance under the condition that the measurement quality can be guaranteed.
此外，本发明实施例提出根据家庭基站的同步精度信息和晶振稳定度信息，为家庭基站配置用于对无线环境或空口环境进行测量的测量周期，从而实现为家庭基站配置测量周期以对周围的无线环境进行测量，并进而弥补标准化组织还尚未制定如何为家庭基站配置测量周期的方案的空白。In addition, the embodiment of the present invention proposes to configure the measurement period for the home base station to measure the wireless environment or the air interface environment for the home base station according to the synchronization accuracy information and the crystal oscillator stability information of the home base station, so as to realize the configuration of the measurement period for the home base station to measure the surrounding The wireless environment is measured, and then the standardization organization has not yet formulated a solution on how to configure the measurement cycle for the femtocell.
附图说明Description of drawings
下面将结合各个附图对本发明具体实施方式进行具体详尽的说明，其中在各个附图中：The specific embodiment of the present invention will be described in detail below in conjunction with each accompanying drawing, wherein in each accompanying drawing:
图1为本发明实施例提供的一个为家庭基站配置测量时间长度的具体实施例处理流程图；FIG. 1 is a processing flowchart of a specific embodiment of configuring a measurement time length for a home base station provided by an embodiment of the present invention;
图2为现有TD-LTE帧结构的示意图；Fig. 2 is the schematic diagram of existing TD-LTE frame structure;
图3为现有TD-LTE系统中的7种时隙比例配置示意图。Fig. 3 is a schematic diagram of seven time slot ratio configurations in the existing TD-LTE system.
具体实施方式Detailed ways
由于，在目前的3GPP标准中还没有定义家庭基站的测量时间和测量周期的配置方案，现有LTE终端在连接状态下配置的测量时间为6ms，在测量时期内LTE终端将停止常规的上下行数据收发处理，对目标基站的下行参考符号进行测量(在LTE系统中，5ms为一个无线半帧长度，则6ms的测量时间可以保证FDD终端在非同步的情况下测量TDD基站时能够测量到有效的下行信号)。然而基站和终端不同，由于基站需要同时服务多个移动终端，如果测量时间配置不合理将会严重影响到移动终端的正常使用，此外由于基站不需要进行系统间切换，因此也不需要配置过长的测量时间，因此可见目前定义的为LTE终端配置的测量时间不适用于配置家庭基站的测量时间。Since the current 3GPP standard has not yet defined the configuration scheme of the measurement time and measurement cycle of the home base station, the measurement time configured for the existing LTE terminal in the connected state is 6ms, and the LTE terminal will stop the conventional uplink and downlink during the measurement period Data transmission and reception processing, measuring the downlink reference symbol of the target base station (in the LTE system, 5ms is the length of a wireless half frame, then the measurement time of 6ms can ensure that the FDD terminal can measure the effective downlink signal). However, the base station is different from the terminal. Since the base station needs to serve multiple mobile terminals at the same time, if the measurement time configuration is unreasonable, it will seriously affect the normal use of the mobile terminal. In addition, since the base station does not need to perform inter-system handover, it does not need to be configured too long. Therefore, it can be seen that the currently defined measurement time configured for the LTE terminal is not applicable to the measurement time configured for the home base station.
此外对于TDD系统而言，由于上下行数据是非连续传输的，并且上下行时隙比例是可调的，对于TD-SCDMA系统而言，一个5ms子帧具有5种上行/下行(UL/DL)时隙比例配置，即1∶5，2∶4，3∶3，4∶2，5∶1；对于TD-LTE系统而言，一个10ms无线帧具有7种典型的时隙比例配置，家庭基站进行干扰测量或者同步测量时，只需对系统的下行参考信号进行测量即可，在完成了初始同步之后，完全没有必要占用家庭基站的上行时隙进行测量，否则如果占用家庭基站的上行时隙进行测量将会增大由于测量所带来的系统开销。因此如果笼统的将家庭基站的测量时间配置为某一固定值，将会造成测量质量的下降或者上行时隙的浪费等问题，例如若测量时间为5ms，将带来20-80％的上行时隙无谓开销；若测量时间定为2ms，将可能无法接收一个子帧内的全部有效下行时隙中的信息，由此会造成开销过大，也就是说如果为家庭基站配置的测量时间和上下行时隙比例没有直接关联，则当系统的上下行时隙比例变化后，则可能导致测量时间不足或者是浪费上行时隙的状况发生。In addition, for the TDD system, since the uplink and downlink data are transmitted discontinuously, and the uplink and downlink time slot ratio is adjustable, for the TD-SCDMA system, a 5ms subframe has 5 kinds of uplink/downlink (UL/DL) Time slot ratio configuration, that is, 1:5, 2:4, 3:3, 4:2, 5:1; for the TD-LTE system, a 10ms wireless frame has 7 typical time slot ratio configurations, home base station When performing interference measurement or synchronization measurement, you only need to measure the downlink reference signal of the system. After the initial synchronization is completed, there is no need to occupy the uplink time slot of the home base station for measurement. Otherwise, if the uplink time slot of the home base station is occupied Taking measurements will increase the system overhead due to the measurements. Therefore, if the measurement time of the home base station is generally configured as a fixed value, it will cause problems such as a decrease in measurement quality or a waste of uplink time slots. For example, if the measurement time is 5ms, it will bring 20-80% of the uplink time. If the measurement time is set to 2ms, it may not be possible to receive information in all effective downlink time slots in a subframe, which will cause excessive overhead. That is to say, if the measurement time configured for the home base station and the upper and lower The ratio of uplink time slots is not directly related, and when the ratio of uplink and downlink time slots of the system changes, it may result in insufficient measurement time or waste of uplink time slots.
针对上述的分析过程，本发明实施例提出一种有效配置家庭基站测量时间的方案，以在能够保证测量质量的情况下，节省资源开销，提高频谱资源的利用率和系统性能。In view of the above analysis process, the embodiment of the present invention proposes a scheme for effectively configuring the measurement time of the home base station, so as to save resource overhead and improve spectrum resource utilization and system performance while ensuring measurement quality.
其中本发明实施例提出的为家庭基站配置测量时间的方案的实现原理是：首先确定系统的上下行时隙比例配置信息，具体地可以通过侦听用于对家庭基站进行同步的目标基站(宏基站或者家庭基站都可以)广播的系统信息，并从侦听到的系统信息中解析出系统的上下行时隙比例配置信息，从而来确定出系统的上下行时隙比例配置信息；并根据确定出的上下行时隙比例配置信息，来为家庭基站配置用于对无线环境或空口环境进行测量的测量时间长度。Among them, the implementation principle of the scheme of configuring the measurement time for the home base station proposed by the embodiment of the present invention is: firstly determine the configuration information of the uplink and downlink time slot ratio of the system, specifically, by listening to the target base station (acer base station) used for synchronizing the home base station The system information broadcasted by the base station or the home base station) and analyze the configuration information of the uplink and downlink time slot ratio of the system from the intercepted system information, so as to determine the configuration information of the uplink and downlink time slot ratio of the system; and according to the determined The obtained uplink and downlink time slot ratio configuration information is used to configure the measurement time length for measuring the wireless environment or the air interface environment for the home base station.
更进一步地，根据确定出的上下行时隙比例配置信息，来为家庭基站配置用于对无线环境或空口环境进行测量的测量时间长度，可以但不限于有如下三种具体的实现方式：Furthermore, according to the determined uplink and downlink time slot ratio configuration information, the home base station configures the measurement time length for measuring the wireless environment or the air interface environment, which can be but not limited to the following three specific implementation methods:
第一种方式：首先确定为达到家庭基站所采用的同步算法所要求的精度所需要测量的最少参考符号数目，再根据上述确定出的上下行时隙比例配置信息，确定在一个无线帧中包括的下行时隙数目或下行子帧数目，以及每个下行时隙或下行子帧中分别包含的能够用于测量的参考符号数目；进而根据上述确定的最少参考符号数目，以及在一个无线帧中包括的下行时隙或下行子帧数目，以及每个下行时隙或下行子帧中分别包含的能够用于测量的参考符号数目，确定为达到家庭基站所采用的同步算法所要求的精度所需要测量的连续下行时隙或下行子帧数目；然后将确定出的下行时隙或下行子帧数目对应的时间长度，作为配置给家庭基站用于对无线环境或空口环境进行测量的测量时间长度。The first method: first determine the minimum number of reference symbols that need to be measured to achieve the accuracy required by the synchronization algorithm adopted by the home base station, and then determine the number of reference symbols included in a wireless frame according to the above determined uplink and downlink time slot ratio configuration information. The number of downlink time slots or the number of downlink subframes, and the number of reference symbols that can be used for measurement contained in each downlink time slot or downlink subframe; then according to the minimum number of reference symbols determined above, and in a radio frame The number of downlink time slots or downlink subframes included, and the number of reference symbols that can be used for measurement contained in each downlink time slot or downlink subframe, are determined to achieve the accuracy required by the synchronization algorithm adopted by the home base station The measured number of consecutive downlink time slots or downlink subframes; then the determined time length corresponding to the number of downlink time slots or downlink subframes is used as the measurement time length configured for the home base station to measure the wireless environment or the air interface environment.
例如家庭基站采用的同步算法所要求的精度为Ts，为达到家庭基站所采用的同步算法所要求的精度Ts所需要测量的最少参考符号数目为N，根据确定出的系统上下行时隙比例配置信息，可以确定出在一个无线帧中包括的下行时隙或下行子帧数目Z，以及每个下行时隙或下行子帧中分别包含的能够用于测量的参考符号数目为M；则可以确定出为达到家庭基站所采用的同步算法所要求的精度Ts所需要测量的连续下行时隙或下行子帧数目为N/M向上取整，这样就可以将N/M向上取整得到的时隙数目所对应的时间长度，作为配置给家庭基站用作对无线环境或空口环境进行测量的测量时间长度。但是配置给家庭基站的测量时间长度的上限应为一个无线帧(LTE系统一个无线帧的长度为10ms)或一个无线半帧(LTE系统中一个无线半帧的长度为5ms)中所包含的下行时隙长度总和，即分配给家庭基站的测量时间长度不应该超过该下行时隙长度总和。For example, the accuracy required by the synchronization algorithm adopted by the home base station is Ts, and the minimum number of reference symbols that need to be measured to achieve the accuracy Ts required by the synchronization algorithm adopted by the home base station is N. According to the determined system uplink and downlink time slot ratio configuration information, the number Z of downlink time slots or downlink subframes included in a radio frame can be determined, and the number of reference symbols that can be used for measurement contained in each downlink time slot or downlink subframe is M; then it can be determined The number of continuous downlink time slots or downlink subframes that need to be measured to achieve the precision Ts required by the synchronization algorithm adopted by the home base station is N/M rounded up, so that the time slot obtained by rounding up N/M The time length corresponding to the number is used as the measurement time length configured for the home base station to measure the wireless environment or the air interface environment. However, the upper limit of the measurement time length configured for the home base station should be the downlink data contained in one wireless frame (the length of a wireless frame in the LTE system is 10ms) or one wireless half frame (the length of a wireless half frame in the LTE system is 5ms). The sum of the lengths of the time slots, that is, the length of the measurement time allocated to the HNB should not exceed the sum of the lengths of the downlink time slots.
第二种方式：首先根据确定出的上下行时隙比例配置信息，确定在一个无线帧中下行时隙对应的时间长度，在确定出的时间长度中选择对应的时间长度，作为配置给家庭基站的测量时间长度，由此可见，配置给家庭基站的测量时间长度的上限应为一个无线帧或一个无线半帧中所包含的下行时隙或下行子帧长度总和，即分配给家庭基站的测量时间长度不应该超过该下行时隙长度总和。此外在该系统为LTE系统时，选择的时间长度至少为一个OFDM符号对应的时间长度，在该系统为TD-SCDMA系统时，选择的时间长度至少为一个时隙对应的时间长度，即分配给家庭基站的测量时间长度是有下限要求的。The second method: First, according to the determined configuration information of the uplink and downlink time slot ratio, determine the time length corresponding to the downlink time slot in a wireless frame, and select the corresponding time length from the determined time length as configuration to the home base station It can be seen that the upper limit of the measurement time configured for the home base station should be the sum of the lengths of downlink time slots or downlink subframes contained in a wireless frame or a wireless half frame, that is, the measurement time allocated to the home base station The time length should not exceed the sum of the lengths of the downlink time slots. In addition, when the system is an LTE system, the selected time length is at least the time length corresponding to one OFDM symbol, and when the system is a TD-SCDMA system, the selected time length is at least the time length corresponding to one time slot, that is, allocated to The measurement time length of the femtocell has a lower limit requirement.
第三种方式：首先根据确定的上下行时隙比例配置信息，确定在一个无线帧中包含的下行时隙或下行子帧的数目及其位置，进而根据确定出的下行时隙或下行子帧的数目及其位置信息，在一个无线帧中选择连续或非连续的下行时隙或下行子帧，并将选取出的下行时隙或下行子帧配置为多播广播单频网(MBSFN，Multicast Broadcast Single Frequency Network)时隙或子帧；然后将配置的MBSFN时隙或子帧作为配置给家庭基站用于进行测量的测量时间长度。The third method: firstly, according to the determined uplink and downlink time slot ratio configuration information, determine the number and position of downlink time slots or downlink subframes contained in a wireless frame, and then according to the determined downlink time slots or downlink subframes The number and its location information, select continuous or discontinuous downlink time slots or downlink subframes in a wireless frame, and configure the selected downlink time slots or downlink subframes as multicast broadcast single frequency network (MBSFN, Multicast Broadcast Single Frequency Network) time slot or subframe; and then use the configured MBSFN time slot or subframe as the measurement time length configured for the home base station to perform the measurement.
如图1所示，为本发明实施例提供的一个为家庭基站配置测量时间长度的具体实施例处理流程图，其中具体的实现过程如下：As shown in FIG. 1 , it is a processing flowchart of a specific embodiment of configuring the measurement time length for a home base station provided by the embodiment of the present invention, wherein the specific implementation process is as follows:
步骤10，家庭基站开机处理；Step 10, starting the home base station;
步骤11，家庭基站开机后，对周围的无线环境进行监测，通过同步信号相关检测的强度来选择目标基站进行同步处理；Step 11, after the home base station is powered on, it monitors the surrounding wireless environment, and selects the target base station for synchronization processing according to the strength of the synchronization signal related detection;
步骤12，检测目标基站的主同步信道信号(PSS，Primary SynchronizationSignal)，以实现5ms帧同步，并检测目标基站的辅同步信道信号(SSS，Secondary Synchronization Signal)，以实现10ms帧同步；Step 12, detecting the primary synchronization channel signal (PSS, Primary Synchronization Signal) of the target base station to realize 5ms frame synchronization, and detecting the secondary synchronization channel signal (SSS, Secondary Synchronization Signal) of the target base station to realize 10ms frame synchronization;
步骤13，检测公共导频信号(CRS，Common Reference Signal)，并以检测到的公共导频信号为基础进行信道估计；Step 13, detecting a common reference signal (CRS, Common Reference Signal), and performing channel estimation based on the detected common reference signal;
步骤14，根据信道估计结果检测目标基站广播信道(PBCH，PhysicalBroadcast Channel)上广播的系统信息；Step 14, detecting system information broadcast on the target base station broadcast channel (PBCH, Physical Broadcast Channel) according to the channel estimation result;
步骤15，从检测到的系统信息中的系统信息块SIB1中的subframeAssignment参数中读取TDD系统的上下行时隙比例配置信息；Step 15, read the uplink and downlink time slot ratio configuration information of the TDD system from the subframeAssignment parameter in the system information block SIB1 in the detected system information;
步骤16，根据读取的上下行时隙比例配置信息，为家庭基站配置用于对周围无线环境进行测量的测量时间长度。其中配置给家庭基站的测量时间长度上限不应超过一个无线帧或无线半帧中下行时隙或下行子帧(包括特殊时隙中的下行时隙)的总长度，下限至少为一个时隙(对于TD-SCDMA系统而言)或者一个OFDM符号(对于LTE系统而言)；例如，对于TD-LTE家庭基站来说，为了避免阻碍终端对广播信息的接收，影响终端从宏基站到家庭基站的小区重选或切换性能，可以选择一个5ms帧中除去包含广播信道的TS0子帧之外的下行时隙长度总和，作为配置给TD-LTE家庭基站的测量时间长度。Step 16, according to the read uplink and downlink time slot ratio configuration information, configure the measurement time length for the home base station to measure the surrounding wireless environment. The upper limit of the measurement time length configured for the home base station should not exceed the total length of a downlink time slot or downlink subframe (including a downlink time slot in a special time slot) in a wireless frame or a wireless half frame, and the lower limit is at least one time slot ( For TD-SCDMA system) or one OFDM symbol (for LTE system); For cell reselection or handover performance, the sum of downlink time slot lengths in a 5ms frame except for the TS0 subframe containing the broadcast channel can be selected as the measurement time length configured for the TD-LTE home base station.
以TD-LTE家庭基站为例，家庭基站开机后首先侦听周围的无线环境，对接收到的PSS、SSS信号进行相关检测，寻找接收信号质量最好的宏基站或者家庭基站进行空口同步；通过侦听到的PSS信号完成5ms帧同步，再由侦听到的SSS信号完成10ms帧同步；帧同步后接收目标基站的公共导频信号CRS，并根据接收到的公共导频信号CRS进行信道估计，根据信道估计结果检索解调广播信道PBCH上广播的系统信息，读取解调得到的系统信息中的SIB1中的TDD上下行时隙比例配置信息，例如，DL∶UL＝2∶2；之后进入正常工作状态后，家庭基站需要对目标宏基站或目标家庭基站的下行公共导频信号进行定期接收，以实现同步维持，只有当目标宏基站或目标家庭基站关闭后，才需要重新进行上述的同步搜索处理。由于TDD系统的上下行时隙比例配置在同一地理区域内是统一的，则当前家庭基站确定出的系统上下行时隙比例配置可以作为家庭基站附近的网络上下行时隙比例配置，即进行重新同步搜索也不再需要再次解析目标基站在广播信道上广播的系统信息以读取系统的上下行时隙比例配置信息；则家庭基站可以根据确定的系统上下行时隙比例配置信息，配置测量时间长度。以图2所示的TDD帧结构为例进行说明，当确定出DL∶UL＝2∶2时，则可以将测量时间长度配置为1ms，即只测量普通下行时隙TS4上的CRS信号，或者将测量时间长度配置为2ms，即测量TS0和TS4中的CRS信号，则5ms帧中的其它3ms帧可以正常工作，可有效降低家庭基站用于测量的开销。如果考虑当同步维持周期较长时，家庭基站和目标基站之间有一定的同步误差，以及多径时延，另外特殊时隙中传输的PDSCH信号也可能包含CRS信号，也可以将测量时间长度设定为3ms，即测量TS0、DwPTS、TS4中的CRS信号。Taking the TD-LTE home base station as an example, after the home base station is turned on, it first listens to the surrounding wireless environment, performs related detection on the received PSS and SSS signals, and searches for the macro base station or home base station with the best received signal quality for air interface synchronization; through The detected PSS signal completes 5ms frame synchronization, and then the detected SSS signal completes 10ms frame synchronization; after frame synchronization, the common pilot signal CRS of the target base station is received, and channel estimation is performed according to the received common pilot signal CRS , retrieve the system information broadcast on the demodulated broadcast channel PBCH according to the channel estimation result, and read the TDD uplink and downlink time slot ratio configuration information in SIB1 in the demodulated system information, for example, DL:UL=2:2; after that After entering the normal working state, the home base station needs to regularly receive the downlink common pilot signal of the target macro base station or target home base station to achieve synchronization maintenance. Only when the target macro base station or target home base station is turned off, the above steps need to be performed again Synchronous search processing. Since the uplink and downlink time slot ratio configuration of the TDD system is uniform in the same geographical area, the system uplink and downlink time slot ratio configuration determined by the current home base station can be used as the network uplink and downlink time slot ratio configuration near the home base station, that is, reconfiguration Synchronous search also no longer needs to analyze the system information broadcast by the target base station on the broadcast channel to read the system's uplink and downlink time slot ratio configuration information; the home base station can configure the measurement time according to the determined system uplink and downlink time slot ratio configuration information length. Taking the TDD frame structure shown in Figure 2 as an example, when it is determined that DL:UL=2:2, the measurement time length can be configured as 1 ms, that is, only the CRS signal on the common downlink time slot TS4 is measured, or Configure the measurement time length as 2ms, that is, measure the CRS signals in TS0 and TS4, then the other 3ms frames in the 5ms frame can work normally, which can effectively reduce the measurement overhead of the home base station. If it is considered that when the synchronization maintenance period is long, there will be a certain synchronization error between the home base station and the target base station, as well as multipath delay, and the PDSCH signal transmitted in the special time slot may also contain the CRS signal, and the measurement time length can also be Set to 3ms, that is to measure the CRS signal in TS0, DwPTS, TS4.
综上可见，由于TDD系统的本身特性，为防止时隙交叉干扰，通常情况下在一个地理区域内的全网上下行时隙比例配置都是相同的，因此本发明实施例提出的为家庭基站配置测量时间的方案就具有通用性和可实现性，根据确定的系统上下行时隙比例而配置的测量时间长度，同样可以用来测量其它基站的下行参考信号。此外，根据系统上下行时隙比例配置的测量时间长度在具有可实现性和通用性的同时，还能够有效地降低用于测量的无线资源开销，例如，针对图3所示的TD-LTE系统中的7种时隙比例配置，本发明实施例可以节约20-80％的测量开销。To sum up, due to the inherent characteristics of the TDD system, in order to prevent time slot cross-interference, the proportion of uplink and downlink time slots on the entire network in a geographical area is usually the same. Therefore, the embodiment of the present invention proposes a home base station The scheme of configuring the measurement time is universal and feasible. The measurement time length configured according to the determined ratio of uplink and downlink time slots in the system can also be used to measure downlink reference signals of other base stations. In addition, the measurement time length configured according to the ratio of uplink and downlink time slots of the system is not only feasible and universal, but also can effectively reduce the wireless resource overhead for measurement, for example, for the TD-LTE system shown in Figure 3 Among the seven time slot ratio configurations, the embodiment of the present invention can save 20-80% of the measurement overhead.
更进一步地，上述为家庭基站配置的测量时间长度的起始时间位置可以通过测量目标基站的下行参考符号的位置来确定，具体地可以但不限于通过下述两种方式来确定：Furthermore, the starting time position of the above-mentioned measurement time length configured for the home base station can be determined by measuring the position of the downlink reference symbol of the target base station, specifically, but not limited to, it can be determined in the following two ways:
第一种方式：首先在测量用于对家庭基站进行同步的目标基站发送的待测下行参考信号过程中，依次对接收窗口内每个待测参考符号的径进行相关检测，得到第一个超过检测阈值的待测参考符号的径；进而将检测得到的待测参考符号的径在接收窗口内的起始时间位置，作为配置给家庭基站的测量时间的起始时间位置。The first method: firstly, in the process of measuring the downlink reference signal to be measured sent by the target base station for synchronizing the home base station, the correlation detection is performed on the path of each reference symbol to be measured in the receiving window in turn, and the first one exceeding Detecting the path of the reference symbol to be measured with the threshold value; and then using the detected start time position of the path of the reference symbol to be measured within the receiving window as the start time position of the measurement time configured for the home base station.
第二种方式：首先在测量用于对家庭基站进行同步的目标基站发送的待测下行参考信号过程中，分别对接收窗口内每个待测参考符号的径进行相关检测，得到检测结果最高的待测参考符号的径；进而将检测得到的待测参考符号的径在接收窗口内的起始时间位置，作为配置给家庭基站的测量时间的起始时间位置。The second method: firstly, during the process of measuring the downlink reference signal to be tested sent by the target base station for synchronizing the home base station, the path of each reference symbol to be tested in the receiving window is respectively correlated and detected, and the highest detection result is obtained. The path of the reference symbol to be measured; furthermore, the detected starting time position of the path of the reference symbol to be measured in the receiving window is used as the starting time position of the measurement time configured for the home base station.
例如，若家庭基站进行空口同步时选择的是目标基站的主/辅同步信号，则可以将测量时间的起始位置设置在主/辅同步信号开始的时刻；若选择的是目标基站的公共导频信号，则可以将测量时间的起始位置设置在公共导频信号中的某一下行时隙的开始时刻。For example, if the home base station selects the primary/secondary synchronization signal of the target base station when performing air interface synchronization, the starting position of the measurement time can be set at the moment when the primary/secondary synchronization signal starts; frequency signal, the starting position of the measurement time may be set at the beginning moment of a certain downlink time slot in the common pilot signal.
此外，单独实施上述为家庭基站配置测量时间的起始位置的实施方案，也在本发明权利要求的保护范围之内。In addition, the implementation of the above implementation of configuring the starting position of the measurement time for the home base station separately is also within the protection scope of the claims of the present invention.
更进一步地，还可以进而根据家庭基站的同步精度要求和家庭基站自身的晶振稳定度、以及系统无线帧长度值等，为家庭基站配置用于进行无线环境测量的测量周期，具体地配置过程如下：Furthermore, according to the synchronization accuracy requirements of the home base station, the crystal oscillator stability of the home base station itself, and the system wireless frame length value, etc., the measurement cycle for wireless environment measurement can be configured for the home base station. The specific configuration process is as follows :
首先确定家庭基站所要求的同步精度信息以及家庭基站自身的晶振稳定度信息；然后根据确定的同步精度信息和晶振稳定度信息，为家庭基站配置用于对无线环境或空口环境进行测量的测量周期。具体地需要根据确定的晶振稳定度信息，确定两个家庭基站之间的最大频率误差值，再根据确定的最大频率误差值，确定两个家庭基站之间的最大时间误差值，进而求取上述确定的同步精度信息与最大时间误差值之间的商值，然后将求取的商值作为周期长度值配置给家庭基站用作对无线环境或空口环境进行测量的测量周期。First determine the synchronization accuracy information required by the home base station and the crystal oscillator stability information of the home base station; then configure the measurement period for the home base station to measure the wireless environment or the air interface environment according to the determined synchronization accuracy information and crystal oscillator stability information . Specifically, it is necessary to determine the maximum frequency error value between the two home base stations according to the determined crystal oscillator stability information, and then determine the maximum time error value between the two home base stations according to the determined maximum frequency error value, and then obtain the above-mentioned The determined quotient value between the synchronization accuracy information and the maximum time error value, and then configure the obtained quotient value as a cycle length value to the home base station as a measurement cycle for measuring the wireless environment or the air interface environment.
例如，若家庭基站的同步精度要求为Ts(单位微秒，如3us)，家庭基站自身的晶振稳定度为P(单位为百万分之一，如0.25ppm，即在时域上一秒钟的最大时间误差为0.25us)，则两个家庭基站之间的最大时间误差将为2P(如0.5us)，则需要配置的测量周期最长为Ts/2P(3/0.5＝6s)。For example, if the synchronization accuracy requirement of the home base station is Ts (in microseconds, such as 3us), the stability of the crystal oscillator of the home base station itself is P (in one millionth, such as 0.25ppm, that is, one second in the time domain The maximum time error is 0.25us), then the maximum time error between two home base stations will be 2P (for example, 0.5us), and the longest measurement period to be configured is Ts/2P (3/0.5=6s).
为达到更好效果，还可以使用系统的无线帧长度值对配置给家庭基站的测量周期进行调整，具体地当判断出为家庭基站配置的测量周期长度值为系统的无线帧长度值的整数倍时，可以选择对为家庭基站配置的测量周期不做调整；而当判断出为家庭基站配置的测量周期长度值不是系统的无线帧长度值的整数倍时，则可以进而求取配置给家庭基站的测量周期长度值与系统无线帧长度值的商值，并对该商值进行向下取整，然后将取整后得到的值与系统无线帧长度值之积，作为新的为家庭基站配置的用于对无线环境或空口环境进行测量的测量周期，从而达到对配置给家庭基站的测量周期进行调整的目的。In order to achieve a better effect, the measurement cycle configured for the home base station can also be adjusted by using the wireless frame length value of the system. Specifically, when it is determined that the measurement cycle length value configured for the home base station is an integer multiple of the wireless frame length value of the system , you can choose not to adjust the measurement period configured for the home base station; and when it is judged that the measurement period length value configured for the home base station is not an integer multiple of the wireless frame length value of the system, you can further obtain the configuration for the home base station The quotient value of the measurement period length value and the system wireless frame length value, and the quotient value is rounded down, and then the product of the rounded value and the system wireless frame length value is used as a new configuration for the home base station The measurement period used for measuring the wireless environment or the air interface environment, so as to achieve the purpose of adjusting the measurement period configured for the home base station.
例如，当系统的无线帧长度为Tr(如10ms)时，由于上述为家庭基站配置的测量周期长度6s是10ms的整数倍，不会出现由于测量周期和无线帧长度不一致而产生的在若干个无线帧后测量时隙位置出现偏差的问题，从而导致无法进行测量。若上述根据家庭基站的同步精度要求和晶振稳定度得出的最长测量周期为12ms，而系统的无线帧长度为10ms，则可以将求取的测量周期12ms调整为10ms，以在同步精度要求和时序稳定度之间取得折中。For example, when the wireless frame length of the system is Tr (such as 10ms), since the above-mentioned measurement cycle length 6s configured for the home base station is an integral multiple of 10ms, there will not be any inconsistency between the measurement cycle and the wireless frame length. The problem that the position of the measurement slot after the radio frame deviates, which makes the measurement impossible. If the longest measurement period obtained based on the synchronization accuracy requirements of the home base station and the stability of the crystal oscillator is 12ms, and the wireless frame length of the system is 10ms, the measured measurement period of 12ms can be adjusted to 10ms to meet the synchronization accuracy requirements. There is a compromise between timing stability.
如果上述为家庭基站配置的用于进行测量的测量时间长度由MBSFN时隙或子帧组成，则为家庭基站配置的用于进行测量的测量周期可以为MBSFN时隙或子帧配置周期的整数倍。If the above-mentioned measurement time length configured for the home base station for measurement is composed of MBSFN time slots or subframes, the measurement period configured for the home base station for measurement may be an integer multiple of the MBSFN time slot or subframe configuration period .
此外，单独实施上述为家庭基站配置测量周期的实施方案，也在本发明权利要求的保护范围之内。In addition, implementing the above-mentioned implementation solution of configuring the measurement period for the home base station separately is also within the protection scope of the claims of the present invention.
这里需要强调的是，本发明实施例上述提出的为家庭基站配置测量时间的方案、为家庭基站配置测量周期的方案、为家庭基站配置测量时间起始位置的方案，可以根据实际需要进行任意组合使用，上述提出的三个方案以及三个方案的任意组合都在本发明权利要求的保护范围之内。What needs to be emphasized here is that the schemes of configuring the measurement time for the home base station, the scheme of configuring the measurement period for the home base station, and the scheme of configuring the starting position of the measurement time for the home base station proposed in the embodiment of the present invention can be combined arbitrarily according to actual needs Use, the three schemes proposed above and any combination of the three schemes are within the protection scope of the claims of the present invention.
另外，具有上述提出的为家庭基站配置测量时间功能的装置、为家庭基站配置测量周期功能的装置、为家庭基站配置测量时间起始位置功能的装置，也在本发明权利要求的保护范围之内，这些装置可以置于现有的家庭基站中，这样具有上述相应功能的家庭基站设备也在本发明权利要求的保护范围之内。In addition, the above-mentioned device for configuring the measurement time function for the home base station, the device for configuring the measurement cycle function for the home base station, and the device for configuring the measurement time start position function for the home base station are also within the protection scope of the claims of the present invention , these devices can be placed in the existing home base station, so the home base station equipment having the above corresponding functions is also within the protection scope of the claims of the present invention.
本发明实施例在家庭基站测量时间和测量周期配置方案中引入“TDD家庭基站根据系统上下行时隙比例对测量时间进行配置”或“TDD家庭基站的测量时间根据系统上下行时隙比例进行调整”。并进一步建议采用以映射表的方式对家庭基站的测量时间、测量时间起始位置进行配置，依据上述图3中现有的TD-LTE系统中的7种时隙比例配置示意图，下表1给出了一个映射表示例，表格给出了一种未来可能在规范中对家庭基站配置的测量时间、测量时间开始位置、测量周期的配置格式等。本发明实施例这里希望能够在规范中针对不同的系统上下行时隙比例，为家庭基站配置不同的测量时间、测量时间的起始位置或者是测量周期。根据实际实施情况，可以对该表1中列出的所有可能的情况进行删减，例如对应时隙比例为0时，若配置的测量时间(连续的)为2ms，则可以选择TS0+TS1或TS5+TS6进行测量，而由于TS0承载的是广播信息PBCH，若用该时隙测量可能会破坏广播信道的接收，则有可能最终选用TS5+TS6来进行测量，而对应的测量时间起始位置设置为TS5。即在标准制定过程中将根据家庭基站的同步算法能力，以及其它因素等对表1中列出的所有情况进行筛选，例如，若规定为保证终端正常接收广播信息，TS0将被禁止配置为测量时间，则可将包含TS0的选项删除，以简化规范；若规定最长测量时间在一个10ms无线帧中不能超过3ms，则可将时隙比例配置2～6(configuration2-6)中的超过3ms测量时间的选项删除。The embodiment of the present invention introduces "the TDD home base station configures the measurement time according to the ratio of the uplink and downlink time slots of the system" or "the measurement time of the TDD home base station is adjusted according to the ratio of the uplink and downlink time slots of the system" in the configuration scheme of the home base station measurement time and measurement period. ". It is further recommended to use a mapping table to configure the measurement time and the starting position of the measurement time of the home base station. According to the schematic diagram of the seven time slot ratio configurations in the existing TD-LTE system in Figure 3 above, the following table 1 gives An example of the mapping table is given, which shows a measurement time, start position of the measurement time, configuration format of the measurement period, etc. that may be configured in the specification for the Femtocell in the future. In the embodiment of the present invention, it is hoped that different measurement times, starting positions of measurement times, or measurement periods can be configured for the home base station in accordance with different system uplink and downlink time slot ratios in the specification. According to the actual implementation situation, all possible situations listed in Table 1 can be deleted. For example, when the corresponding time slot ratio is 0, if the configured measurement time (continuous) is 2ms, you can choose TS0+TS1 or TS5+TS6 is used for measurement, and since TS0 carries the broadcast information PBCH, if this time slot measurement may destroy the reception of the broadcast channel, it is possible to finally select TS5+TS6 for measurement, and the corresponding measurement time starting position Set to TS5. That is, in the standard formulation process, all the situations listed in Table 1 will be screened according to the synchronization algorithm capability of the home base station and other factors. For example, if it is specified to ensure that the terminal can normally receive broadcast information, TS0 will be prohibited from being configured as a measurement time, the option including TS0 can be deleted to simplify the specification; if it is stipulated that the longest measurement time cannot exceed 3ms in a 10ms wireless frame, the time slot ratio configuration 2~6 (configuration2-6) can exceed 3ms The option to measure time is removed.
表1：Table 1:
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.
| Application Number | Priority Date | Filing Date | Title |
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| CN200910161962.4ACN101998483B (en) | 2009-08-26 | 2009-09-07 | Method and device for configuring measurement time for home base station |
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| CN200910091574 | 2009-08-26 | ||
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| CN200910161962.4ACN101998483B (en) | 2009-08-26 | 2009-09-07 | Method and device for configuring measurement time for home base station |
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