WO2010063193A1 - 一种小区上下行子帧自适应配置方法 - Google Patents
一种小区上下行子帧自适应配置方法 Download PDFInfo
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- WO2010063193A1 WO2010063193A1 PCT/CN2009/074038 CN2009074038W WO2010063193A1 WO 2010063193 A1 WO2010063193 A1 WO 2010063193A1 CN 2009074038 W CN2009074038 W CN 2009074038W WO 2010063193 A1 WO2010063193 A1 WO 2010063193A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Definitions
- the present invention relates to a subframe allocation technique in a Long Term Evolution (LTE) system of a radio access network, and in particular, to a method for adaptively configuring a downlink subframe on a cell.
- LTE Long Term Evolution
- the uplink and downlink subframes are allocated by the uplink and downlink subframe configuration numbers of the cell in the LTE time division duplex (TDD) system, and different uplink and downlink subframes are determined in the system to determine different uplink and downlink.
- the ratio of the resources for example, the configuration number is 1, indicating that the ratio of the uplink and downlink subframes is 1:2; the configuration number is 2, indicating that the ratio of the uplink and downlink subframes is 2:3, etc.
- the uplink and downlink subframe allocation of the cell is fixed by the background, and the uplink and downlink subframes cannot be dynamically configured according to the actual service condition of the cell. Regardless of the actual downlink service demand, the uplink and downlink resources of the cell are manually changed. Frame configuration, otherwise the uplink and downlink resources are unchanged. In the actual use process, the actual demand for the uplink and downlink resources of the cell will be different for different areas and different time periods. For example, the cells distributed in the business area, the users use mobile office more frequently, and the proportion of data services is relatively large. Compared with the large-scale downlink bandwidth, the users mainly use the voice service in the streets and shopping malls. The bandwidth requirements of the uplink and downlink services are basically the same.
- the main object of the present invention is to provide a method for adaptively configuring a downlink subframe on a cell, so that uplink and downlink resources of the cell can be adaptively and dynamically configured, thereby improving resource utilization of the cell. Rate.
- the present invention provides a method for adaptively configuring a downlink subframe on a cell, including:
- the lower layer periodically indicates the amount of resources occupied by the uplink and downlink subframes of the current cell of the system;
- B When the resource statistics period arrives, the average amount of resources occupied by the uplink and downlink reported in the current statistical period is averaged. The average amount of resources occupied by the line;
- step C Calculate the deviation between the ratio of the average occupied resources of the uplink and the downlink and the ratio of the total resources of the uplink and the downlink, and determine whether the calculated deviation value is smaller than a preset first threshold, and if it is smaller than the first threshold, Return to step B, if not less than the first threshold, perform step D;
- step C Select an uplink and downlink subframe configuration number according to the ratio of the uplink and downlink average occupied resources. Further, in the above method, if the calculated deviation value is not less than the first threshold in step C, the method further includes:
- step D Calculating a ratio of the amount of the remaining resources in the uplink and the downlink to the total amount of the uplink and downlink resources, determining whether the calculated ratio is greater than a preset second threshold, and if greater than the second threshold, returning to step B, if not greater than the second threshold, Then perform step D.
- the step of calculating a ratio of the amount of the uplink and downlink remaining resources to the total amount of the uplink and downlink resources includes: calculating a ratio of the uplink remaining resource amount to the uplink total resource amount, the downlink remaining resource amount, and the downlink total resource amount, respectively;
- the determining that is greater than the second threshold includes: a ratio of the amount of the remaining uplink resources to the total amount of the uplink resources, and a ratio of the amount of the remaining downlink resources to the total amount of the downlink resources is greater than the second threshold; if not greater than the second threshold
- the determining includes: the ratio of the amount of the uplink remaining resources to the total amount of the uplink resources, the ratio of the amount of the remaining downlink resources to the total amount of the downlink resources is not greater than the second threshold, or one of the values is not greater than the second threshold.
- the step of selecting an uplink-downlink subframe configuration number includes: selecting an uplink-downlink subframe configuration number corresponding to an uplink-downlink resource ratio that is closest to the uplink-downlink average occupied resource ratio.
- the lower layer is a physical layer or a medium access control layer.
- the amount of resources that characterize the occupancy of the uplink and downlink subframes is a service rate, or a power, or a signal to noise ratio, or a number of users, or a number of services.
- the resource quantity statistics period is an integer multiple of the resource quantity reporting period.
- the first threshold and the second threshold are obtained by simulation or testing.
- the present invention further provides a system for implementing adaptive configuration of a downlink subframe on a cell, where the system includes: a lower layer and a radio resource control layer, where
- the lower layer is configured to periodically report the amount of resources that characterize the occupancy of the downlink subframes in the current cell of the system
- the radio resource control layer is configured to:
- the average amount of all the uplink and downlink resources reported in the current statistical period is averaged, and the deviation between the ratio of the upper and lower average occupied resources and the ratio of the total uplink and downlink resources is calculated, and the calculated Whether the deviation value is d, at a preset first threshold;
- the calculated deviation value is less than the preset first threshold
- all the uplink and downlink occupied resources reported in the statistical period are averaged, and the uplink and downlink averages are recalculated.
- the uplink and downlink subframe configuration numbers are selected according to the ratio of the average occupied resources in the current period.
- the radio resource control layer is further configured to:
- the ratio of the amount of the remaining resources in the uplink and the downlink to the total amount of the resources in the uplink and the downlink is calculated, and it is determined whether the calculated ratio is greater than a preset second threshold. If the calculated ratio is greater than the second threshold, the average resource occupied by the uplink and downlink is recalculated when the next resource count period is reached. And a deviation between the ratio of the total resources of the uplink and the downlink, and re-determining whether the calculated deviation value is less than a preset first threshold;
- the uplink and downlink subframe configuration numbers are selected according to the ratio of the uplink and downlink average occupied resources.
- the lower layer is a physical layer or a medium access control layer.
- the method and system for configuring the uplink and downlink subframe adaptive configuration of the cell according to the present invention calculates the resource amount corresponding to the current uplink and downlink subframe configuration and the actual downlink resource requirement. The deviation between the uplink and downlink subframes is determined, and the appropriate uplink and downlink subframe configuration is selected when the uplink and downlink subframe configuration needs to be adjusted, so that the uplink and downlink subframe configuration is more in line with actual service requirements or user requirements. .
- the invention adopts the adaptive configuration of the uplink and downlink subframes, so that the uplink and downlink subframe configuration can be adjusted in real time according to actual service requirements, and can be changed in real time according to user requirements, compared with the prior art in which the fixed configuration is used. Flexible, so as to achieve the effect of sharing uplink and downlink resources, saving system resources, and improving system band resource utilization and system capacity.
- FIG. 1 is a schematic flowchart of an implementation process of an adaptive uplink and downlink subframe configuration method of a cell according to the present invention.
- the source of the preferred embodiment of the present invention calculates a deviation between the resource amount corresponding to the current uplink and downlink subframe configuration and the actual downlink resource requirement, and determines whether the uplink and downlink subframe needs to be adjusted according to the comparison between the deviation value and the predetermined threshold. Configure and select the appropriate uplink and downlink subframe configuration when adjustment is needed.
- the present invention can be implemented on an evolved base station eNodeB.
- the eNodeB has the functions of the original base station NodeB and the radio network controller (RNC), which is equivalent to the combination of the NodeB and RNC functions.
- the lower layer refers to a physical layer, or a medium access control (MAC) layer;
- the amount of resources that characterize the occupancy of the uplink and downlink subframes may be a service rate, or a power, or a signal to noise ratio, or a number of users, or a service. Number of parameters.
- the service rate corresponds to the system bandwidth, so the service rate can indicate the occupied bandwidth of the system.
- FIG. 1 is a schematic flowchart of an implementation process of an adaptive configuration method for a downlink subframe in a cell according to the present invention, as shown in FIG.
- the uplink and downlink subframe adaptive configuration method of the cell of the present invention includes the following steps:
- Step 101 The cell is set up according to the default configuration of the uplink and downlink subframe allocation, and the lower layer periodically reports the resource amount of the current cell downlink subframe occupation of the current cell.
- the lower layer is a physical layer or a MAC layer; the period is preset, and the period size is based on not increasing the system load, and is generally obtained by simulation or testing;
- the amount of resources can be traffic rate, power, signal to noise ratio, number of users, number of services, and so on.
- the lower layer is the physical layer, and the resource amount indicating the occupancy of the uplink and downlink subframes is the service rate.
- this step is: After the cell is established according to the configuration of the default uplink and downlink subframe allocation, the physical layer periodically Reports the uplink and downlink service rates of the current cell.
- Step 102 When the resource quantity statistics period arrives, average the occupied resources of all the upper and lower rows reported in the current statistical period, and obtain the average occupied resources of the uplink and downlink;
- the statistics are completed at the Radio Resource Control (RRC) layer.
- RRC Radio Resource Control
- the resource quantity statistics period is also preset, and the size of the period is generally an integer multiple of the reporting period, for example, the statistical period is 10 times, 20 times, etc. of the reporting period, and the multiple relationship can also be obtained by simulation or testing.
- the multiples can be as large as possible, so that on the one hand, statistics can be more accurate, and on the other hand, system load is not increased.
- the reason for averaging the resources occupied by the uplink and downlink is that the accidental factors are avoided as much as possible.
- the average occupied resources of the uplink and the downlink are respectively calculated as the uplink average occupied resources and the downlink average occupied resources.
- Steps 103 to 104 Calculate the deviation between the ratio of the average occupied resources of the uplink and the downlink and the ratio of the total resources of the uplink and the downlink, and determine whether the calculated deviation value is less than a preset first threshold, if less than the first threshold If the ratio of the actual uplink and downlink services of the current cell is substantially the same as the default configuration of the system, go back to step 102 and wait for the next resource quantity statistics period to arrive. Otherwise, go to step 105.
- the first threshold can be obtained through simulation or testing. Generally, it is related to the total number of uplink and downlink subframe configurations, the ratio of uplink and downlink rate ratios, and the like.
- Steps 105 to 106 Calculate the ratio of the amount of the remaining resources in the uplink and the downlink to the total amount of the uplink and downlink resources, and determine whether the calculated ratio is greater than a second threshold. If the value is greater than the second threshold, The service ratio does not match the system default configuration ratio. However, since the remaining resources are sufficient, the uplink and downlink subframe configuration does not need to be adjusted. Then, the process returns to step 102, and waits for the next resource quantity statistics period to arrive. Otherwise, the process proceeds to step 107.
- the second threshold value can be obtained through simulation or testing, and is generally occupied by the business and the downlink. Source distribution statistics, statistical cycles and other factors are related.
- the ratio of the uplink remaining resources to the total uplink resources, the ratio of the downlink remaining resources to the total downlink resources, and the second threshold are respectively compared, if greater than Both ratios are greater than the second threshold, otherwise it means that there is a ratio not greater than the second threshold, or both ratios are not greater than the second threshold.
- This step actually means that the actual service ratio of the uplink and downlink in the cell does not match the default configuration of the system. However, if the remaining resources are sufficient, the uplink and downlink subframe configuration may not be adjusted. That is to say, in this case, the uplink and downlink subframe configuration may also be adjusted. Therefore, steps 105 to 106 are optional. If steps 105 to 106 are not performed, the offset value in step 104 is greater than the first threshold. Go directly to step 107 and reselect the uplink and downlink subframe configuration numbers.
- Step 107 Select a more suitable uplink and downlink subframe configuration number according to the calculated ratio of the uplink and downlink average occupied resources.
- the selection of a more appropriate uplink and downlink subframe configuration number refers to selecting the closest ratio of the uplink and downlink resources and the ratio corresponding to all the configuration numbers of the uplink and downlink subframes according to the ratio of the uplink and downlink average occupied resources.
- the ratio of the average occupied resources of the uplink and the downlink is 3:5, and the ratio of resources corresponding to the uplink and downlink subframe configuration with the configuration number of 1 is 1:2; the proportion of resources corresponding to the uplink and downlink subframe configuration with the configuration number of 2.
- the value is 2:3, the closest configuration is the uplink and downlink subframe configuration with the configuration number of 2. Therefore, if the selection is more appropriate, the uplink and downlink subframe configuration with the configuration number 2 is selected.
- the cell reconfiguration process is initiated.
- the UE performs scheduling on the new uplink and downlink subframe configuration, how to initiate the cell reconfiguration process and how to reconfigure the cell. Both are prior art and will not be described in detail herein.
- the resource quantity that represents the occupation of the uplink and downlink subframes is the service rate
- the service rate reporting period is
- the service rate statistics period is ⁇ 2 , 2 is an integer multiple
- the uplink service rate reported in the second time For Rate uu is the downlink service rate reported is Rate DL 1
- the total uplink bandwidth is Rate UL al
- the total downlink bandwidth is Rat eDL total .
- the implementation process of the uplink and downlink subframe adaptive configuration method of the cell in this embodiment includes: Step 1 1 : The cell is established according to the default configuration of the uplink and downlink subframe allocation, and the lower layer reports the uplink and downlink traffic rate when the reporting period of each service rate arrives.
- Step 12 When the cell service rate statistics period arrives, the average rate of the secondary uplink and downlink services reported by the lower layer in the current statistics period is averaged.
- the reason for obtaining the average service rate is: It is generally considered that the statistical average of the service rate in a certain period of time can represent the current load situation of the cell.
- Step 13 Calculate the ratio of the uplink and downlink average traffic rate, Rat flVg /Rate D , and compare the ratio of the uplink and downlink average traffic rate to the total uplink and downlink bandwidth ratio R a t toferi /R a t 3 ⁇ 4 tota to obtain the uplink-downlink traffic rate ratio.
- Deviation from the ratio of total uplink to downlink ratio It is determined whether the deviation value is smaller than the first threshold value. If the value is less than, the current cell actually accepts the uplink and downlink service proportions to be consistent with the system configuration ratio, the system may access the maximum possible, and the cell uplink and downlink subframe configuration does not need to be changed, and then the execution is performed. Step 12, otherwise step 14;
- the first threshold can be configured in the background, with reference to the performance test results of the simulated or actual operating environment.
- Step 14 When the deviation value is greater than the first threshold, it indicates that the actual downlink service ratio of the cell does not match the system configuration ratio. If the uplink and downlink subframe configuration changes may increase the system capacity, further, the uplink and downlink residuals of the cell may be calculated. In the case of the bandwidth, if the remaining bandwidth is sufficient, the uplink and downlink subframe configurations of the cell may not be changed. Therefore, the ratio of the uplink uplink bandwidth to the total uplink bandwidth (Rate ULJotal - Rate UL avg ) / Rate UL total and the downlink remaining bandwidth are calculated separately. Ratio of total downlink bandwidth e D
- the calculated ratio is compared with the second threshold. If the two ratios are greater than the second threshold, the uplink and downlink subframes are not close to each other. Saturated, and there are enough uplink and downlink bandwidths to be used, then go to step 12 and wait for the rate statistics period to arrive; if both ratios are smaller than the first The second threshold ⁇ or one of the less than the second threshold, then step 15;
- the second threshold can be configured in the background, with reference to the performance test results of the simulated or actual operating environment.
- Step 15 At this point, it is indicated that at least one of the services carried by the uplink or downlink sub-frame is near-saturated, and the configuration of the uplink and downlink subframes of the system is not suitable for the current service requirement, and the configuration of the uplink and downlink subframes of the current cell needs to be changed, so that the cell is more suitable.
- the uplink and downlink bandwidth configuration is configured, so that the uplink and downlink subframe configuration numbers corresponding to the uplink and downlink resource ratios closest to the uplink and downlink average traffic rate ratios are reselected.
- the cell reconfiguration process is initiated, and after the cell reconfiguration process is completed, the UE performs scheduling on the new uplink and downlink subframe configuration.
- the following is a system for implementing adaptive configuration of a downlink sub-frame in a cell, where the system includes: a lower layer and a radio resource control layer, where the lower layer is configured to periodically report the occupancy of the current cell downlink subframe in the current cell. Amount of resources;
- the RRC layer is configured to average all the uplink and downlink occupied resources reported in the current statistical period when the resource statistics period is reached, and calculate the ratio of the upper and lower average occupied resources to the total uplink and downlink resources. Deviation between the two, and determine whether the calculated deviation value is less than a preset first threshold;
- the RRC layer is configured to average all the uplink and downlink occupied resources reported in the next statistical period, and recalculate the uplink and downlink average occupied Deviation between the ratio of the resource amount and the ratio of the total resources of the uplink and the downlink, and re-determining whether the calculated deviation value is less than a preset first threshold;
- the RRC layer is configured to select an uplink-downlink subframe configuration number according to a ratio of uplink and downlink average occupied resource ratios in the current period, or set Calculating a ratio of the amount of the remaining resources in the uplink and the downlink to the total amount of the uplink and downlink resources, determining whether the calculated ratio is greater than a preset second threshold, and if the calculated ratio is greater than the second threshold, in the next statistical period All the uplink and downlink occupied resources are reported to be averaged, and the deviation between the ratio of the upper and lower average occupied resources and the ratio of the total uplink and downlink resources is recalculated, and it is re-determined whether the calculated deviation value is smaller than the preset first If the calculated ratio is not greater than the second threshold, the uplink and downlink subframe configuration numbers are selected according to the ratio of the uplink and downlink average occupied resources.
- the present invention adopts an adaptive configuration of uplink and downlink subframes, so that the uplink and downlink subframe configuration can be adjusted in real time according to actual service requirements, and can be changed in real time according to user requirements, compared with the prior art.
- the method is more flexible, so that the effect of sharing uplink and downlink resources can be achieved, system resources are saved, system resource resource utilization and system capacity are improved.
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Description
一种小区上下行子帧自适应配置方法 技术领域
本发明涉及无线接入网长期演进（LTE, Long Term Evolution ) 系统中子 帧分配技术， 尤其涉及一种小区上下行子帧自适应配置方法。
背景技术
在 3GPP TS 36.211协议中规定， LTE时分双工（ TDD ) 系统中通过小区 上下行子帧配置号来对上下行子帧进行分配， 在系统中确定了不同的配置号 就确定了不同的上下行资源比例， 比如： 配置号为 1 , 表示上下行子帧比例 为 1:2; 配置号为 2, 表示上下行子帧比例为 2:3等等， 共有七种配置。 由于 系统上下行总带宽是固定不变的，这七种配置对这些子帧进行了上下行划分， 从而确定了上行和下行各自占用的带宽。
在现有系统中， 小区上下行子帧分配由后台固定配置， 上行和下行子帧 不能根据小区实际业务情况动态配置， 无论实际上下行业务需求如何， 小区 上下行资源除非通过手动更改上下行子帧配置， 否则上下行资源不变。 在实 际使用过程中， 小区实际对业务上下行资源的需求对于不同的区域和不同的 时间段都会不同， 比如： 分布在商务区的小区， 用户使用移动办公比较频繁, 数据业务比例比较大， 需要比较大的下行带宽； 而主要覆盖在街道、 商场的 小区， 用户以使用语音业务为主， 上下行业务带宽需求基本相同。 又如： 在 某些场景中， 会出现大量用户突然使用数据业务的情况， 对小区下行带宽有 比平时更高的需求， 如重大比赛期间、 重点新闻事件区域等等。 这些小区实 际业务需求与时间、 覆盖范围具有相关性， 现有系统中统一进行固定的上下 行配置， 小区上下行子帧不能自适应的灵活配置， 这就导致了频带资源利用 率不高、 系统容量低的问题。
发明内容
有鉴于此， 本发明的主要目的在于提供一种小区上下行子帧自适应配置 方法， 使小区上行和下行资源能自适应动态配置， 进而提高小区的资源利用
率。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供了一种小区上下行子帧自适应配置方法， 包括：
A、 下层周期性上才艮表征系统当前小区上下行子帧占用情况的资源量； B、资源量统计周期到达时，对当前统计周期内上报的所有上下行已占用 资源量进行平均， 得到上下行平均已占用资源量；
C、计算上下行平均已占用资源量比值与上下行总资源量比值之间的偏差 值， 判断所计算出的偏差值是否小于预设的第一阔值， 如果小于所述第一阔 值， 则返回步骤 B, 如果不小于所述第一阔值， 则执行步骤 D;
D、 根据所述上下行平均已占用资源量比值， 选择上下行子帧配置号。 进一步， 上述方法中， 步骤 C中如果所计算出的偏差值不小于所述第一 阔值， 还包括：
计算上下行剩余资源量与上下行总资源量的比值， 判断所计算的比值是 否大于预设的第二阔值， 如果大于第二阔值， 则返回步骤 B, 如果不大于第 二阔值， 则执行步骤 D。
进一步， 上述方法中， 计算上下行剩余资源量与上下行总资源量的比值 的所述步骤包括： 分别计算上行剩余资源量与上行总资源量比值、 下行剩余 资源量与下行总资源量比值； 如果大于第二阔值的所述判断包括： 上行剩余 资源量与上行总资源量的比值、 下行剩余资源量与下行总资源量的比值均大 于第二阔值； 如果不大于第二阔值的所述判断包括： 上行剩余资源量与上行 总资源量的比值、下行剩余资源量与下行总资源量的比值均不大于第二阔值， 或其中之一不大于第二阔值。
进一步， 上述方法中， 选择上下行子帧配置号的所述步骤包括： 选择与 所述上下行平均已占用资源量比值最接近的上下行资源比例对应的上下行子 帧配置号。
进一步， 上述方法中， 所述下层为物理层、 或媒体接入控制层。 所述表 征上下行子帧占用情况的资源量为业务速率、 或功率、 或信噪比、 或用户数、 或业务数。 所述资源量统计周期为资源量上报周期的整数倍。
进一步， 上述方法中， 所述第一阔值、 第二阔值通过仿真或测试得到。 本发明还一种实现小区上下行子帧自适应配置的系统， 该系统包括： 下 层和无线资源控制层， 其中，
所述下层设置成周期性上报表征系统当前小区上下行子帧占用情况的资 源量；
所述无线资源控制层设置成：
在资源量统计周期到达时， 对当前统计周期内上报的所有上下行已占用 资源量进行平均， 计算上下行平均已占用资源量比值与上下行总资源量比值 之间的偏差， 并判断所计算出的偏差值是否 d、于预设的第一阔值；
在所计算出的偏差值小于预设的第一阔值时， 则在下一个资源量统计周 期到达时， 对该统计周期内上报的所有上下行已占用资源量进行平均， 重新 计算上下行平均已占用资源量比值与上下行总资源量比值之间的偏差， 并重 新判断所计算出的偏差值是否 d、于预设的第一阔值； 以及
在所计算出的偏差值不小于预设的第一阔值时， 则根据当前周期内上下 行平均已占用资源量比值， 选择上下行子帧配置号。
进一步， 上述系统中，
所述无线资源控制层还设置成：
在当前所计算出的偏差值不小于预设的第一阔值时， 计算上下行剩余资 源量与上下行总资源量的比值，判断所计算的比值是否大于预设的第二阔值， 如果所计算出的比值大于所述第二阔值，则在下一个资源量统计周期到达时， 对该统计周期内上报的所有上下行已占用资源量进行平均， 重新计算上下行 平均已占用资源量比值与上下行总资源量比值之间的偏差， 并重新判断所计 算出的偏差值是否小于预设的第一阔值； 以及
在所计算出的比值不大于所述第二阔值时， 则根据上下行平均已占用资 源量比值， 选择上下行子帧配置号。
进一步， 上述系统中，
所述下层为物理层或媒体接入控制层。
本发明所提供的小区上下行子帧自适应配置方法和系统， 根据上报的表 征系统上下行子帧占用情况的资源量， 计算当前上下行子帧配置对应的资源 量情况与实际上下行资源需求之间的偏差， 进而确定是否需要调整上下行子 帧配置， 并在需要调整上下行子帧配置时选择合适的上下行子帧配置， 使上 下行子帧配置更符合实际的业务需求或用户需求。 本发明釆用上下行子帧自 适应配置的方式， 可使上下行子帧配置根据实际业务需求进行实时调整， 根 据用户需求而实时改变， 相比于现有技术中釆用固定配置的方式更灵活， 从 而能达到使上行和下行资源共享的效果， 节省了系统资源， 提高了系统频带 资源利用率和系统容量。
附图概述
图 1为本发明小区上下行子帧自适应配置方法的实现流程示意图。
本发明的较佳实施方式 源量， 计算当前上下行子帧配置对应的资源量情况与实际上下行资源需求之 间的偏差，根据偏差值与预定阔值的比较确定是否需要调整上下行子帧配置， 并在需要调整时选择合适的上下行子帧配置。
本发明可在演进基站 eNodeB上完成， eNodeB同时具备原有基站 NodeB 和无线网络控制器（RNC ) 的功能， 相当于 NodeB和 RNC功能的组合。 这 里， 所述下层指物理层、 或媒体接入控制 （MAC )层； 所述表征上下行子帧 占用情况的资源量可以是业务速率、 或功率、 或信噪比、 或用户数、 或业务 数等参数。 其中， 业务速率与系统带宽相对应， 所以业务速率可表示系统已 占用带宽。
图 1为本发明小区上下行子帧自适应配置方法的实现流程示意图， 如图
1所示， 本发明小区上下行子帧自适应配置方法包括以下步骤：
步骤 101 : 按照上下行子帧分配的默认配置建立小区， 下层周期性上报 表征系统当前小区上下行子帧占用情况的资源量；
本步骤中， 所述下层为物理层、 或 MAC层； 所述周期是预先设置的， 周期大小以不增加系统负荷为基准， 一般可通过仿真或测试获得； 所述表征 上下行子帧占用情况的资源量可以是业务速率、 功率、 信噪比、 用户数、 业 务数等等。 举个例子来说， 下层为物理层， 表征上下行子帧占用情况的资源 量为业务速率， 那么， 本步骤就是： 在按默认上下行子帧分配的配置建立小 区后， 物理层周期性的上报当前小区的上下行业务速率。
步骤 102: 资源量统计周期到达时， 对当前统计周期内上报的所有上下 行已占用资源量进行平均， 得到上下行平均已占用资源量；
本步骤中， 所述统计在无线资源控制 （RRC )层完成。
这里， 所述资源量统计周期也是预先设置的， 该周期的大小一般是上报 周期的整数倍， 如： 统计周期为上报周期的 10倍、 20倍等， 倍数关系也可 通过仿真或测试获得， 倍数可以尽量大， 这样， 一方面可以统计得更准确， 另一方面也不增加系统负荷。
本步骤中， 之所以对上下行已占用资源量进行平均， 其原因是尽量避免 偶然因素的发生。 其中， 求上下行平均已占用资源量为分别计算上行平均已 占用资源量和下行平均已占用资源量。
步骤 103 ~ 104: 计算上下行平均已占用资源量比值与上下行总资源量比 值之间的偏差， 判断所计算出的偏差值是否小于预先设定的第一阔值， 如果 小于第一阔值， 说明当前小区上下行实际业务比例与系统默认配置比例基本 相符， 则返回步骤 102, 等待下次资源量统计周期到达， 否则进入步骤 105; 这里， 所述第一阔值可通过仿真或测试得到， 一般与上下行子帧配置的 总个数、 上下行速率比值范围等因素有关。
步骤 105 ~ 106: 计算上下行剩余资源量与上下行总资源量的比值， 判断 所计算的比值是否大于预先设定的第二阔值， 如果大于第二阔值， 说明虽然 当前小区上下行实际业务比例与系统默认配置比例不相符， 但由于剩余资源 量足够， 因此也不需要对上下行子帧配置进行调整， 则返回步骤 102, 等待 下次资源量统计周期到达， 否则进入步骤 107;
这里， 所述第二阔值可通过仿真或测试得到， 一般与业务上下行占用资
源分布统计、 统计周期等因素有关。
本步骤中， 与第二阔值比较实际是分别计算的上行剩余资源量与上行总 资源量比值、下行剩余资源量与下行总资源量比值与第二阔值分别进行比较， 如果大于是指如果两个比值均大于第二阔值， 否则是指有一个比值不大于第 二阔值、 或两个比值均不大于第二阔值。
本步骤实际是指在小区上下行实际业务比例与系统默认配置比例不相 符， 但剩余资源量足够的情况下， 也可以不调整上下行子帧配置。 也就是说， 对于这种情况，也可以调整上下行子帧配置， 因此，步骤 105 ~ 106是可选的， 如果不执行步骤 105 ~ 106, 步骤 104中偏差值大于第一阔值的情况下直接进 入步骤 107 , 重新选择上下行子帧配置号。
步骤 107: 根据所计算的上下行平均已占用资源量比值， 选择更合适的 上下行子帧配置号；
本步骤中， 所述选择更合适的上下行子帧配置号是指根据上下行平均已 占用资源量比值， 选择上下行子帧所有配置号中所对应的上下行资源比例与 比值最接近的一个， 比如： 上下行平均已占用资源量比值为 3:5 , 且配置号为 1的上下行子帧配置对应的资源比例为 1 :2; 配置号为 2的上下行子帧配置对 应的资源比例为 2:3 , 则最接近的是配置号为 2的上下行子帧配置， 所以选择 更合适的就选择配置号为 2的上下行子帧配置。
上述步骤 103 ~ 107也由无线资源控制层完成。
在重新选择上下行子帧配置号后， 会发起小区重配置流程， 待小区重配 置完成后， UE在新的上下行子帧配置上进行调度， 具体如何发起小区重配置 流程以及小区如何重配置均为已有技术， 此处不再详述。
下面结合具体实施例对小区上下行子帧自适应配置方法的实施作进一步 详细描述。
本实施例中， 所述表征上下行子帧占用情况的资源量为业务速率， 业务 速率上报周期为 ， 业务速率统计周期为 Γ2 , 2为 ；的整数倍； 第 /次上报的 上行业务速率为 Rateuu ,第 /次上报的下行业务速率为 RateDL 1 , 上行总带宽为 RateUL al , 下行总带宽为 RateDL total。
本实施例小区上下行子帧自适应配置方法的实现流程包括： 步骤 1 1 : 按照上下行子帧分配的默认配置建立小区， 下层在每个业务速 率上报周期 到达时上报上下行业务速率。
步骤 12 : 小区业务速率统计周期 到达时， 对当前统计周期内下层上报 的《次上下行业务速率分别取平均值， 具体的：
上行平均业务速率 RateUL
下行平均业务速率 RateDL.
这里， 求取平均业务速率的原因是： 通常认为某段时间内业务速率的统 计平均值能够代表小区当时负荷情况。
步骤 13 : 计算上下行平均业务速率的比值 Rat flVg/RateD , 将上下行平 均业务速率比值与上下行总带宽比值 Rat toferi/Rat¾ tota,进行比较，得到上下行 业务速率比值与上下行总带宽比值间的偏差：
判断该偏差值是否小于第一阔值 ^， 如果小于， 说明当前小区实际接纳 上下行业务比例与系统配置比例基本相符， 系统可最大可能接入， 小区上下 行子帧配置不需要更改， 则执行步骤 12 , 否则执行步骤 14;
这里， 第一阔值 可后台配置， 参考模拟或实际运行环境的性能测试结 果。
步骤 14 : 当偏差值大于第一阔值时， 说明小区实际上下行业务比例与系 统配置比例不相符， 若上下行子帧配置更改有可能提高系统容量， 但进一步 的， 可计算小区上下行剩余带宽情况， 如果剩余带宽足够， 也可以不更改小 区上下行子帧配置， 因此， 分别计算小区上行剩余带宽与上行总带宽的比值 (RateULJotal -RateUL avg )/RateUL total 、 下行剩余带宽与下行总带宽的比值 eD
这里， 第二阔值 可后台配置， 参考模拟或实际运行环境的性能测试结 果。
步骤 15: 此时说明上行或下行子帧承载的业务至少有一个已接近饱和， 且系统上下行子帧配置不适合当前业务需求， 则需要更改当前小区上下行子 帧配置， 才能实现小区更合适的上下行带宽配置， 因此， 重新选择与上下行 平均业务速率比值最接近的上下行资源比例对应的上下行子帧配置号。
之后， 发起小区重配置流程， 小区重配置流程完成后， UE在新的上下行 子帧配置上进行调度。
下面是本发明的一种实现小区上下行子帧自适应配置的系统， 该系统包 括： 下层和无线资源控制层， 其中， 所述下层设置成周期性上报表征系统当 前小区上下行子帧占用情况的资源量；
所述无线资源控制层设置成在资源量统计周期到达时， 对当前统计周期 内上报的所有上下行已占用资源量进行平均， 计算上下行平均已占用资源量 比值与上下行总资源量比值之间的偏差， 并判断所计算出的偏差值是否小于 预设的第一阔值；
在所计算出的偏差值小于预设的第一阔值时， 所述无线资源控制层设置 成对下一个统计周期内上报的所有上下行已占用资源量进行平均， 重新计算 上下行平均已占用资源量比值与上下行总资源量比值之间的偏差， 并重新判 断所计算出的偏差值是否小于预设的第一阔值；
在所计算出的偏差值不小于预设的第一阔值时， 所述无线资源控制层设 置成根据当前周期内上下行平均已占用资源量比值，选择上下行子帧配置号， 或者设置成计算上下行剩余资源量与上下行总资源量的比值， 判断所计算的 比值是否大于预设的第二阔值， 如果所计算出的比值大于所述第二阔值， 对 下一个统计周期内上报的所有上下行已占用资源量进行平均， 重新计算上下 行平均已占用资源量比值与上下行总资源量比值之间的偏差， 并重新判断所 计算出的偏差值是否小于预设的第一阔值； 若所计算出的比值不大于所述第 二阔值时， 则根据上下行平均已占用资源量比值， 选择上下行子帧配置号。
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。
工业实用性 本发明釆用上下行子帧自适应配置的方式， 可使上下行子帧配置根据实 际业务需求进行实时调整， 根据用户需求而实时改变， 相比于现有技术中釆 用固定配置的方式更灵活， 从而能达到使上行和下行资源共享的效果， 节省 了系统资源， 提高了系统频带资源利用率和系统容量。
Claims
1、 一种小区上下行子帧自适应配置方法， 该方法包括：
A、 下层周期性上才艮表征系统当前小区上下行子帧占用情况的资源量；
B、资源量统计周期到达时，对当前统计周期内上报的所有上下行已占用 资源量进行平均， 得到上下行平均已占用资源量；
C、 计算上下行平均已占用资源量比值与上下行总资源量比值之间的偏 差， 判断所计算出的偏差值是否小于预设的第一阔值， 如果所计算出的偏差 值小于所述第一阔值， 则返回步骤 B, 如果所计算出的偏差值不小于所述第 一阔值， 则执行步骤 D;
D、 根据所述上下行平均已占用资源量比值， 选择上下行子帧配置号。
2、 根据权利要求 1所述的小区上下行子帧自适应配置方法， 其中， 步骤 C中如果所计算出的偏差值不小于所述第一阔值时， 还包括：
计算上下行剩余资源量与上下行总资源量的比值， 判断所计算的比值是 否大于预设的第二阔值， 如果所计算出的比值大于所述第二阔值， 则返回步 骤 B, 如果所计算出的比值不大于所述第二阔值， 则执行步骤 D。
3、 根据权利要求 2所述的小区上下行子帧自适应配置方法， 其中， 计算上下行剩余资源量与上下行总资源量的比值的所述步骤包括： 分别 计算上行剩余资源量与上行总资源量比值、 下行剩余资源量与下行总资源量 比值；
如果所计算出的比值大于所述第二阔值的所述判断包括： 所计算出的上 行剩余资源量与上行总资源量的比值、 下行剩余资源量与下行总资源量的比 值均大于所述第二阔值；
如果所计算出的比值不大于所述第二阔值的所述判断包括： 所计算出的 上行剩余资源量与上行总资源量的比值、 下行剩余资源量与下行总资源量的 比值均不大于第二阔值， 或所计算出的两个比值中的一个不大于所述第二阔 值。
4、 根据权利要求 3所述的小区上下行子帧自适应配置方法， 其中， 选择
上下行子帧配置号的所述步骤包括： 选择与所述上下行平均已占用资源量比
号。
5、 根据权利要求 1至 4任一项所述的小区上下行子帧自适应配置方法， 其中， 所述下层为物理层、 或媒体接入控制层。
6、 根据权利要求 1至 4任一项所述的小区上下行子帧自适应配置方法， 其中， 所述表征上下行子帧占用情况的资源量为业务速率、 或功率、 或信噪 比、 或用户数、 或业务数。
7、 根据权利要求 1至 4任一项所述的小区上下行子帧自适应配置方法， 其中， 所述资源量统计周期为资源量上报周期的整数倍。
8、 根据权利要求 1至 4任一项所述的小区上下行子帧自适应配置方法， 其中， 所述第一阔值通过仿真或测试得到。
9、 根据权利要求 2至 4任一项所述的小区上下行子帧自适应配置方法， 其中， 所述第二阔值通过仿真或测试得到。
10、 一种实现小区上下行子帧自适应配置的系统， 该系统包括： 下层和 无线资源控制层， 其中，
所述下层设置成周期性上报表征系统当前小区上下行子帧占用情况的资 源量；
所述无线资源控制层设置成：
在资源量统计周期到达时， 对当前统计周期内上报的所有上下行已占用 资源量进行平均， 计算上下行平均已占用资源量比值与上下行总资源量比值 之间的偏差， 并判断所计算出的偏差值是否 d、于预设的第一阔值；
在所计算出的偏差值小于预设的第一阔值时， 则在下一个资源量统计周 期到达时， 对该统计周期内上报的所有上下行已占用资源量进行平均， 重新 计算上下行平均已占用资源量比值与上下行总资源量比值之间的偏差， 并重 新判断所计算出的偏差值是否小于预设的第一阔值； 以及
在所计算出的偏差值不小于预设的第一阔值时， 则根据当前周期内上下 行平均已占用资源量比值， 选择上下行子帧配置号。
11、 根据权利要求 10所述的系统，
所述无线资源控制层还设置成：
在当前所计算出的偏差值不小于预设的第一阔值时， 计算上下行剩余资 源量与上下行总资源量的比值，判断所计算的比值是否大于预设的第二阔值， 如果所计算出的比值大于所述第二阔值，则在下一个资源量统计周期到达时， 对该统计周期内上报的所有上下行已占用资源量进行平均， 重新计算上下行 平均已占用资源量比值与上下行总资源量比值之间的偏差， 并重新判断所计 算出的偏差值是否小于预设的第一阔值； 以及
在所计算出的比值不大于所述第二阔值时， 则根据上下行平均已占用资 源量比值， 选择上下行子帧配置号。
12、 根据权利要求 11所述的系统， 其中，
所述下层为物理层或媒体接入控制层。
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| CN102036295B (zh) * | 2010-12-02 | 2014-04-16 | 大唐移动通信设备有限公司 | 一种确定上下行配置的方法、系统和设备 |
| CN102196580B (zh) * | 2011-06-22 | 2014-09-03 | 新邮通信设备有限公司 | 一种动态配置tdd基站上下行子帧比例的方法 |
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