WO2013123729A1 - 一种智能载波管理方法及装置 - Google Patents

一种智能载波管理方法及装置 Download PDF

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Publication number
WO2013123729A1
WO2013123729A1 PCT/CN2012/075406 CN2012075406W WO2013123729A1 WO 2013123729 A1 WO2013123729 A1 WO 2013123729A1 CN 2012075406 W CN2012075406 W CN 2012075406W WO 2013123729 A1 WO2013123729 A1 WO 2013123729A1
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Prior art keywords
carrier
load
carriers
load level
fan
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PCT/CN2012/075406
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English (en)
French (fr)
Inventor
罗雪松
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中兴通讯股份有限公司
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Publication of WO2013123729A1 publication Critical patent/WO2013123729A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/08Load balancing or load distribution
    • H04W28/082Load balancing or load distribution among bearers or channels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/52Allocation or scheduling criteria for wireless resources based on load

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to an intelligent carrier management method and apparatus. Background technique
  • SCM Smart Carrier Management
  • the SCM selection method is to divide the carrier set according to the number of users (the number of used MACIndex) and the reverse busy ratio (RAB) in multiple carriers of one cell, and then preferentially according to the number of equivalent users from the carrier list of the same set. Select the carrier with the lowest equivalent number of users.
  • the two carrier sets of light load and reload are divided.
  • the AN Access Network
  • the load level of each carrier is represented by the highest load cell of the carrier.
  • the load fan level is represented by Lcs, and the carrier fan of the highest Lcs in each carrier is selected, and the load level of the carrier fan is used as the load level of the carrier.
  • the load level of the carrier is less than or equal to 1 for light load, the carrier load level is 2 for heavy load, and the carrier load level is greater than or equal to 3 for overload.
  • the SCM algorithm can select more than one carrier from the light-loaded carrier list when selecting the number of carriers; and for the overloaded carrier list, only the most one carrier can be selected.
  • S1 set is not empty, only one or more carriers can be selected from the S1 set. If the S1 set is empty and the S2 set is not empty, only one carrier can be selected from S2. If the S1 and S2 sets are empty, the S3 set is not empty. , you can only select one carrier from S3.
  • EV-DO adopts forward virtual handover in the same carrier, that is, one cell is selected from a plurality of cells as a forward serving cell.
  • the NLB Network Load Balance
  • An equivalent user of a cell refers to a user whose forward to-be-sent queue is not empty at the sampling time.
  • the number of equivalent users in the cell is large, indicating that the number of users occupying the forward air slot of the cell is large at the same time, and the equivalent number of users can more accurately reflect the load level of the cell compared with the number of online users only.
  • the load ratio ( Load ) is used to represent the ratio of the current equivalent number of users to the maximum number of supportable users.
  • the ratio of the forward signal strength to the equivalent number of users on the cell 1 is greater than the ratio of the forward signal strength to the equivalent number of users on the cell 2. If the AT selects the cell 1 as the forward serving cell, it will obtain more actual forward throughput than the cell 2 selected in the past.
  • Cell 1 cell 2 and cell 3 are respectively on 4 carriers, and the cell load of cell 1 on fl, f2, and f3 is overloaded, while the load of other carriers is at light load.
  • the number of carriers when the number of carriers is selected according to the SCM algorithm, only the number of carriers can be selected. F4 one carrier. But in reality, cell 2 and cell 3 of each carrier are not busy. If the NLB algorithm is used, avoiding the use of cell 1, and instead using cell 2 and cell 3, more carriers can be utilized, using idle carriers that cannot be used by the conventional SCM algorithm, such as cell 2 and cell 3 on each carrier.
  • the invention provides an intelligent carrier management method and device, which can solve the problem that the SCM function and the NLB function cannot be well integrated in the prior art, and can fully utilize the idle carrier fan in the access network.
  • an intelligent carrier management method is provided, which is applied to support
  • the method includes:
  • the available carrier is selected based on the principle of preferentially selecting the carrier with the lightest load, and the AT and the AN establish a connection on the carrier;
  • the load level of the determined carrier is: a load level of a carrier fan having the lowest load level of the carrier, and a load level of the carrier.
  • the dividing the carrier into different sets according to a load level of the carrier including:
  • the carrier is divided into three sets, namely, S1, S2, and S3, where S1 is a set of carriers with a load level of 0 or 1 of the load fan of the lowest load; S2 is a load level of the load fan of the lowest load of 2 A set of carriers; S3 is a set of carriers with a load level of 3 for the lowest loaded carrier fan.
  • the dividing the carrier into different sets according to a load level of the carrier including:
  • the carrier is divided into four sets, namely S0, Sl, S2, and S3, where SO is all
  • the carrier of the load fan is a set of carriers of 0 or 1; S1 is the lowest load of the load fan with a load level of 0 or 1, but also includes a set of carriers of the load fan with a load level greater than 1; S2 is the lowest load
  • the load level of the carrier fan is 2, but it also includes the set of carriers of the carrier fan whose load level is greater than; the S3 is the set of carriers with the load level of the load fan of the lowest load.
  • the dividing the carrier into different sets according to the load level of the carrier includes: dividing the carrier into three sets, namely, S0, SI, and S2, where the load level of all the fans of the SO is 0. Or a set of carriers of 1; S1 is the lowest load of the load fan with a load level of 0 or 1, but also includes a set of carriers of the load fan with a load level greater than 1; S2 is the lowest load of the load fan with a load level of 2 or A collection of 3 carriers.
  • the method further includes:
  • the forward virtual switch is assisted by the NLB function.
  • an intelligent carrier management apparatus which is applied to an AN that supports an NLB function and the function is enabled, and the apparatus includes:
  • a load level determining module configured to determine a load level of the carrier, and provide a load level of the carrier for the set partitioning module
  • a set partitioning module configured to determine a load level of a carrier provided by the module according to a load level, divide the carrier into different sets, and provide each set of carriers for the carrier selection module;
  • a carrier selection module configured to: in each set of carriers provided by the set partitioning module, select an available carrier by preferentially selecting a carrier with the lightest load, and establish an connection between the access terminal and the access network on the carrier;
  • the load level determining module is specifically configured to determine the load level of the carrier, and the load level of the carrier fan with the lowest load level of the carrier is used as the load level of the carrier.
  • the set dividing module is specifically configured to divide the carrier into three sets, which are respectively S1, S2, and S3, when the carriers are divided into different sets according to the load level of the carrier,
  • SI is the set of carriers with the load level of 0 or 1 of the load fan of the lowest load
  • S2 is the set of carriers with the load level of the load fan of the lowest load
  • S3 is the load level of the load fan of the lowest load is 3.
  • the set dividing module is specifically configured to divide the carrier into four sets when the carriers are divided into different sets according to the load level of the carrier, where are S0, Sl, S2, and S3, where The load level of all carriers with a load level of 0 or 1; S1 is the lowest load of the load fan with a load level of 0 or 1, but also includes the set of carriers of the load fan with a load level greater than 1; S2 is the lowest load The load level of the load fan is 2, but it also includes the set of carriers of the load fan whose load level is greater than; the S3 is the set of carriers with the load level of 3 of the load fan of the lowest load.
  • the set dividing module is specifically configured to divide the carrier into three sets when the carriers are divided into different sets according to the load level of the carrier, where are S0, SI, and S2, where SO is all the carriers.
  • the load level of the fan is 0 or 1 carrier set;
  • S1 is the load level of the carrier with the lowest load is 0 or 1, but also includes the carrier of the carrier fan with load level greater than 1;
  • S2 is the load of the lowest load A collection of carriers with a fan load level of 2 or 3.
  • the device further includes: a virtual switching module, configured to perform a forward virtual handover by using an NLB function after receiving the notification of the established connection sent by the carrier selection module;
  • the carrier selection module is further configured to notify the virtual switching module that a connection is established after establishing a connection on the selected carrier.
  • the load level of the carrier is determined by the load level of the carrier fan with the lightest load level, and the carrier load grading of the conventional algorithm is overcome, only the heavy-duty carrier fan is considered, and the light load is not fully considered.
  • the fan problem when combined with the NLB function, can make full use of the idle carrier fan in the AN. Therefore, in the multi-carrier radio access network, when using the intelligent carrier management and the network load balancing strategy, two independent strategies are used in combination to overcome the problems existing in the simultaneous operation of the two, and fully utilize the two strategies. Advantage, maximize the system capacity Volume and improve the user experience.
  • FIG. 1 is a schematic diagram of carrier grading of a single cell in the prior art
  • FIG. 2 is a schematic diagram of carrier grading of multiple cells in the prior art
  • FIG. 3 is a schematic diagram of forward virtual handover in the prior art
  • FIG. 4 is a schematic diagram of a combination of two technologies of SCM and NLB in the prior art
  • FIG. 5 is a schematic flowchart of an intelligent carrier management method according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an intelligent carrier management apparatus according to an embodiment of the present invention. detailed description
  • the principle of the SCM algorithm for determining the carrier load level is to select the load level of the carrier with the heaviest load in the carrier as the load level of the carrier.
  • the improved SCM algorithm of the present invention adjusts the carrier load level determination principle for the scenario in which the NLB algorithm runs simultaneously. When the NLB algorithm is running simultaneously, the carrier load level is determined according to the load level of the lightest load fan.
  • the AN prefers f4, and the remaining two carriers select from three sets fl, f2, and f3.
  • a set SO which includes a set of carriers in which all of the carriers are lightly loaded.
  • the definition of set S1 is modified as follows: not all sectors are lightly loaded sectors, and the load level of the lowest loaded cell is a lightly loaded set of carriers.
  • the SCM algorithm and the NLB algorithm combine to preferentially select the carrier wave in the SO when selecting multiple carriers. If the number of carriers of the SO is smaller than the maximum number of carriers allowed for the multi-carrier connection, the most carriers are selected from the S1 set.
  • the improved SCM algorithm of the present invention is more traditional than the SCM algorithm, and the carrier of the carrier fan can be divided into light loads, and then used by the NLB algorithm. They are thus able to make fuller use of idle carrier fans in the system, allowing more multi-carrier scenarios than traditional algorithms.
  • FIG. 5 is a schematic flowchart of an intelligent carrier management method according to an embodiment of the present invention. As shown in FIG. 5, in this embodiment, the smart carrier management method of the present invention specifically includes the following steps:
  • Step 501 Receive a connection establishment request.
  • Step 502 Determine whether the NLB function is started at the same time, if it is started, go to step 503, otherwise, go to step 506;
  • Step 503 Determine a load level of the carrier.
  • the specific method is that the load level of the carrier fan with the lowest load level of the carrier is used as the load level of the carrier.
  • Step 504 Divide the carrier into different sets according to the load level of the carrier
  • the carriers are divided into different sets according to the load level of the carrier, and different partitioning schemes may be adopted according to actual conditions. For example, the following three schemes may be adopted:
  • the first option is:
  • the carrier is divided into three sets, namely, S1, S2, and S3, where S1 is the set of carriers with the load level of 0 or 1 of the lowest load carrier fan; S2 is the load level of the load fan of the lowest load. A set of carriers other than 2; S3 is a set of carriers with a load level of 3 of the lowest loaded load fan.
  • S1 is the set of carriers with the load level of 0 or 1 of the lowest load carrier fan
  • S2 is the load level of the load fan of the lowest load.
  • S3 is a set of carriers with a load level of 3 of the lowest loaded load fan.
  • the second option is:
  • the carrier is divided into four sets, namely S0, Sl, S2, and S3, where SO is a set of carriers whose load levels are all 0 or 1 for all the carriers; S1 is the load level of the load fan of the lowest load is 0. Or 1, but also includes a set of carrier carriers with a load level greater than 1; S2 is the lowest load of the load fan with a load level of 2, but also includes a set of carriers with a load level greater than the carrier fan; S3 is the lowest load A set of carriers with a load level of 3 for the fan.
  • the third option is:
  • the carrier is divided into three sets, namely S0, SI and S2, where SO is a set of carriers whose load levels are all 0 or 1 for all the carriers; S1 is the load of the lowest load of the load fan is 0 or 1. But also includes a set of carriers carrying a load level greater than one; S2 is a set of carriers with a load level of 2 or 3 for the lowest loaded load fan.
  • Step 508 In each set of carriers, selecting the available carriers by preferentially selecting the carrier with the lightest load, and performing step 508;
  • step 504 For example, if the carrier is divided into different sets by the second scheme in step 504, the steps are
  • an available carrier is selected from four sets of S0, Sl, S2, and S3.
  • Step 506 Determine the load level of the carrier according to the load level of the carrier with the highest load level of the carrier, and divide the carrier into three sets of S1, S2, and S3 according to the SCM method in the prior art according to the load level of the carrier;
  • Step 507 Select an available carrier from three sets of Sl, S2, and S3.
  • Step 508 The AT establishes a connection with the AN on the selected available carrier.
  • Step 509 Determine whether to start the NLB function, if it is started, go to step 510, if not, go to step 511;
  • Step 510 Use the NLB function to assist the virtual handover, and end the processing flow;
  • Step 511 Perform virtual switching by relying on the traditional algorithm of the AT. After the foregoing steps 510 and 511 are completed, the subsequent operations are performed according to the provisions in the prior art, for example, the established connection is released according to the actual situation, and details are not described herein.
  • FIG. 6 is a schematic structural diagram of an intelligent carrier management apparatus according to an embodiment of the present invention.
  • an intelligent carrier management apparatus of the present invention includes a load level determining module 601, a set dividing module 602, a carrier selecting module 603, and a virtual Switching module 604.
  • the load level determination module 601 is configured to determine the load level of the carrier.
  • the load level determining module 601 is configured to determine the load level of the carrier, and the adopted scheme is: the load level of the carrier fan with the lowest load level of the carrier as the load level of the carrier; Provide the load level of the carrier;
  • the set partitioning module 602 is configured to determine the load level of the carrier provided by the module 601 according to the load level, and divide the carrier into different sets.
  • the set partitioning module 602 is specifically configured to divide the carrier into different sets according to the load level of the carrier, and may adopt different partitioning schemes according to actual conditions. For example, the following three schemes may be adopted:
  • the first option is:
  • the carrier is divided into three sets, namely, S1, S2, and S3, where S1 is the set of carriers with the load level of 0 or 1 of the lowest load carrier fan; S2 is the load level of the load fan of the lowest load is 2. A set of carriers; S3 is a set of carriers with a load level of 3 for the lowest loaded carrier fan.
  • the second option is:
  • the carrier is divided into four sets, namely S0, Sl, S2, and S3, where SO is a set of carriers whose load levels are all 0 or 1 for all the carriers; S1 is the load level of the load fan of the lowest load. It is not 0 or 1, but it also contains the carrier of the carrier fan with load level greater than 1; S2 is the load level of the carrier with the lowest load is 2, but also contains the carrier of the carrier fan with the load level greater than; The lowest loaded load fan has a load level of 3 carrier sets.
  • the third option is:
  • the carrier is divided into three sets, namely S0, SI and S2, where SO is a set of carriers whose load levels are all 0 or 1 for all the carriers; S1 is the load of the lowest load of the load fan is 0 or 1. But also includes a set of carriers carrying a load level greater than one; S2 is a set of carriers with a load level of 2 or 3 for the lowest loaded load fan.
  • the carrier selection module 603 is configured to: in each set of carriers provided by the set partitioning module 602, select an available carrier by preferentially selecting the carrier with the lightest load, and establish an connection between the AT and the AN on the carrier.
  • the virtual switching module 604 is configured to receive the forward virtual handover by using the NLB function after receiving the notification of the established connection sent by the carrier selection module 603.
  • the carrier selection module 603 is further configured to be selected. After the connection is established on the carrier, the virtual switching module 604 is notified that the connection has been established.

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Abstract

本发明公开了一种智能载波管理方法,包括:确定载波的负荷级别;根据载波的负荷级别,将载波划分为不同的集合;在载波的各集合中,以优先选择负荷最轻的载波的原则,选出可用载波,并且接入终端与接入网在该载波上建立连接;其中,所述确定载波的负荷级别为:以载波的负荷级别最低的载扇的负荷级别作为该载波的负荷级别。本发明还同时公开了一种智能载波管理装置,采用本发明能解决现有技术中智能载波管理(SCM)功能和网络负荷均衡(NLB)功能不能很好融合的问题,能够更充分利用接入网中空闲的载扇。

Description

一种智能载波管理方法及装置 技术领域
本发明涉及无线通讯技术领域, 特别是涉及一种智能载波管理方法及 装置。 背景技术
在当前的 CDMA IX EV-DO空中接口版本( 3GPP2 C.S0024- B ) 中, 支持多个载波同时捆绑使用。 在现有技术中, SCM ( Smart Carrier Management, 智能载波管理)技术能从多个载波中选择相对负荷最轻的载 波使用。 SCM选择方法是在一个小区的多个载波中,根据用户数( MACIndex 的使用数量)、 反向忙比例 (RAB )来划分载波集合, 再从相同集合的载波 列表中根据等效用户数, 优先选择等效用户数最低的载波。
例如图 1的载波分级示意图中, 如果 fl和 f2是重载, f3和 f4是轻载, 则划分轻载和重载两个载波集合。 AN ( Access Network, 接入网 )从轻载 的载波列表中, 选择可分配的最大载波数; 如果轻载的载波列表为空, 则 只能重载的载波列表中选择最多一个载波使用。
如果 AT ( Access Terminal, 接入终端)激活集中有多个小区, 每一个 小区又有多个载波, 那么, 每个载波的负荷级别由该载波的最高负荷的小 区所代表。 在图 2中, 以 Lcs表示载扇负荷级别, 选出每个载波中最高 Lcs 的载扇, 以该载扇的负荷级别, 作为载波的负荷级别。
此处, 设定载波级别 S1={ 0,1 }, 做为轻载的载波列表; S2={ 2}, 作为 重载的载波列表; S3={ 3 }, 作为过载的载波列表。 同时, 设定载波的负荷 级别小于等于 1的为轻载, 载波的负荷级别为 2的为重载, 载波的负荷级 别为大于等于 3的为过载。
载波 fl上因为有<小区 1 , fl〉的负荷最高, 负荷级别为 2, 因而 fl划 分为 S2。 其它载波的划分原则类似。
对于多载波连接, SCM算法在进行载波数目的选择时, 可以从轻载的 载波列表中选择大于一个载波; 而对于重载的载波列表, 只能从中选择最 多一个载波。
如果 S1集合不空, 只能从 S1集合选择 1个或多个载波; 如果 S1集合 空, S2集合不空, 则只能从 S2中选择一个载波; 如果 Sl、 S2集合空, S3 集合不空, 则只能从 S3中选择一个载波。
同时, 由于 EV-DO在相同载波内采用前向虚拟切换, 也就是从多个小 区中选择一个小区作为前向服务小区使用。 在现有技术中, NLB ( Network Load Balance, 网络负荷均衡)技术能在不同小区中, 选择前向信号强度与 等效用户数比值最大的小区, 优先作为服务小区使用。 某个小区的等效用 户是指在在采样时刻, 该小区的前向待发送队列非空的用户。 该小区的等 效用户数多, 表示同时在占用该小区的前向空口时隙的用户数多, 相对于 只比较在线用户数, 等效用户数能更真实地反映小区的负荷级别。 实际参 与 NLB判断的某小区等效用户数, 还需要加入时间参数进行平滑。 在图 3 中, 用负荷率 ( Load )表示当前等效用户数与最大可支持用户数的比例。 AT在小区 1上前向信号强度与等效用户数的比值大于小区 2上前向信号强 度与等效用户数的比值。如果 AT选择小区 1作为前向服务小区将会比以往 选择小区 2获得更多的实际前向吞吐率。
SCM和 NLB两种技术, 目前是孤立使用的,对于某些场景没有达到最 佳的组合效果, 例图 4中的场景。 小区 1、 小区 2和小区 3分别在 4个载波 上, 小区 1在 fl、 f2、 f3上的小区负荷都处于过载, 而其它载扇的负荷则 处于轻载。
因而 S1集合中只有 f4, fl、 f2、 f3属于 S3。
后面的多载波连接, 根据 SCM算法进行载波数目的选择时, 只能选择 f4一个载波。但实际上,各个载波的小区 2和小区 3并不忙。如果通过 NLB 算法, 避开使用小区 1 , 转而使用小区 2和小区 3则可以利用更多的载波, 利用传统的 SCM算法不能使用的空闲载扇,例如各个载波上的小区 2和小 区 3。
可见, 在 SCM和 NLB功能同时支持的 AN中, 有必要对传统的 SCM 算法进行改进, 以使 AN达到更好的整体性能效果。 发明内容
本发明提供一种智能载波管理方法及装置, 以解决现有技术中 SCM功 能和 NLB功能不能很好融合的问题,能够更充分利用接入网中空闲的载扇。
作为本发明的一个方面, 提供了一种智能载波管理方法, 应用于支持
NLB功能且该功能开启的 AN中, 该方法包括:
确定载波的负荷级别;
根据载波的负荷级别, 将载波划分为不同的集合;
在载波的各集合中, 以优先选择负荷最轻的载波的原则, 选出可用载 波, 并且 AT与 AN在该载波上建立连接;
其中, 所述确定载波的负荷级别为: 以载波的负荷级别最低的载扇的 负荷级别, 作为该载波的负荷级别。
进一步地, 所述根据载波的负荷级别, 将载波划分为不同的集合, 包 括:
将载波划分为三个集合, 分别为 Sl、 S2和 S3, 其中, S1为最低负荷 的载扇的负荷级别为 0或 1的载波的集合; S2为最低负荷的载扇的负荷级 别为 2的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。
进一步地, 所述根据载波的负荷级别, 将载波划分为不同的集合, 包 括:
将载波划分为四个集合, 分别为 S0、 Sl、 S2和 S3 , 其中, SO为所有 载扇的负荷级别均为 0或 1的载波的集合; S1为最低负荷的载扇的负荷级 别为 0或 1 , 但也包含负荷级别大于 1的载扇的载波的集合; S2为最低负 荷的载扇的负荷级别为 2, 但也包含负荷级别大于 的载扇的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。
进一步地, 所述根据载波的负荷级别, 将载波划分为不同的集合, 包 括: 将载波划分为三个集合, 分别为 S0、 SI和 S2, 其中, SO为所有载扇 的负荷级别均为 0或 1的载波的集合; S1为最低负荷的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的集合; S2为最低负荷的载 扇的负荷级别为 2或 3的载波的集合。
进一步地, 所述接入终端与接入网在该载波上建立连接之后, 该方法 还包括:
采用 NLB功能辅助进行前向虚拟切换。
作为本发明的另一个方面, 提供了一种智能载波管理装置, 应用于支 持 NLB功能且该功能开启的 AN中, 该装置包括:
负荷级别确定模块, 用于确定载波的负荷级别, 为集合划分模块提供 载波的负荷级别;
集合划分模块, 用于根据负荷级别确定模块提供的载波的负荷级别, 将载波划分为不同的集合, 为载波选择模块提供载波的各集合;
载波选择模块, 用于在集合划分模块提供的载波的各集合中, 以优先 选择负荷最轻的载波的原则, 选出可用载波, 并且接入终端与接入网在该 载波上建立连接;
其中, 所述负荷级别确定模块, 具体用于确定载波的负荷级别时, 以 载波的负荷级别最低的载扇的负荷级别作为该载波的负荷级别。
进一步地, 所述集合划分模块, 具体用于在根据载波的负荷级别, 将 载波划分为不同的集合时, 将载波划分为三个集合, 分别为 Sl、 S2和 S3, 其中, SI为最低负荷的载扇的负荷级别为 0或 1的载波的集合; S2为最低 负荷的载扇的负荷级别为 2的载波的集合; S3为最低负荷的载扇的负荷级 别为 3的载波的集合。
进一步地, 所述集合划分模块, 具体用于在根据载波的负荷级别, 将 载波划分为不同的集合时, 将载波划分为四个集合, 分别为 S0、 Sl、 S2和 S3, 其中, SO为所有载扇的负荷级别均为 0或 1的载波的集合; S1为最低 负荷的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的 集合; S2为最低负荷的载扇的负荷级别为 2, 但也包含负荷级别大于 的 载扇的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。
进一步地, 所述集合划分模块, 具体用于在根据载波的负荷级别, 将 载波划分为不同的集合时, 将载波划分为三个集合, 分别为 S0、 SI和 S2, 其中, SO为所有载扇的负荷级别均为 0或 1的载波的集合; S1为最低负荷 的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的集合; S2为最低负荷的载扇的负荷级别为 2或 3的载波的集合。
进一步地, 所述装置还包括: 虚拟切换模块, 用于收到载波选择模块 发来的已建立连接的通知后, 采用 NLB功能辅助进行前向虚拟切换;
相应的, 所述载波选择模块, 还用于在选出的载波上建立连接后, 通 知虚拟切换模块已建立连接。
本发明有益效果如下:
本发明智能载波管理方法中, 载波的负荷级别由负荷级别最轻的载扇 的负荷级别来确定, 克服了传统算法的载波负荷分级中, 只考虑重载载扇, 而没有充分考虑轻载载扇的问题, 从而在结合 NLB功能时, 能够更充分利 用 AN 中空闲的载扇。 从而, 在多载波的无线接入网中, 在使用智能载波 管理和网络负荷均衡策略时, 将两个独立的策略结合使用, 克服了两者同 时运行时存在的问题, 充分利用了两种策略优势, 达到最大化提高系统容 量和改善用户体验的效果。 附图说明
图 1为现有技术中单个小区的载波分级示意图;
图 2为现有技术中多个小区的载波分级示意图;
图 3为现有技术中的前向虚拟切换示意图;
图 4为现有技术中的 SCM和 NLB两种技术组合示意图;
图 5为本发明实施例的智能载波管理方法流程示意图;
图 6为本发明实施例的智能载波管理装置结构示意图。 具体实施方式
以下结合附图以及实施例, 对本发明进行进一步详细说明。 应当理解, 此处所描述的具体实施例仅仅用以解释本发明, 并不限定本发明。
现有技术中, SCM算法对于载波负荷级别确定的原则是选择载波中负 荷最重的载扇的负荷级别作为该载波的负荷级别。本发明改进的 SCM算法, 针对 NLB 算法同时运行的场景, 对载波负荷级别确定原则做出调整, 在 NLB算法同时运行时, 载波的负荷级别按负荷级别最轻的载扇的负荷级别 来确定。
仍以图 4所示情形为例进行说明。 根据本发明方法的载波负荷级别确 定原则, 所有载波都属于轻载的载波, 即 Sl={fl , f2、 f3、 f4}, S2=(p, S3=(p。
假设一个多载波连接从 SI中最多可以选择三个载波, 那么 AN优先选 择 f4, 剩下两个载波则从 fl、 f2、 f3三个集合中选择。
为了区分 f4和 fl、 f2、 f3, 引入集合 SO, 它包括所有载扇都为轻载的 载波集合。 集合 S1的定义修改为: 不是所有载扇都为轻载的扇区, 且最低 负荷的小区的负荷级别为轻载的载波集合。 则图 4所示例子中, 载波集合 划分如下: S0={f4};
Sl={ fl、 f2、 f3}。
SCM算法和 NLB算法相结合在选择多个载波时, 优先选择 SO中的载 波, 如果 SO的载波数量小于多载波连接允许分配的最大载波数, 则从 S1 集合中选择最多的载波。
由此, 在 SCM算法与 NLB算法相结合的场合, 本发明改进后的 SCM 算法较传统的 SCM算法, 由于能够!巴轻载的载扇所在的载波划分到轻载, 然后通过 NLB算法使用到它们, 因而能够更充分使用系统中空闲的载扇, 允许的多载波场景也比传统的算法更多。
下面以一个具体实施例的方式对本发明智能载波管理方法做进一步详 细说明。
图 5为本发明实施例的智能载波管理方法流程示意图, 如图 5所示, 该实施例中, 本发明智能载波管理方法具体包括如下步驟:
步驟 501: 收到连接建立请求;
步驟 502: 判断是否同时启动 NLB功能, 如启动, 则执行步驟 503, 否则, 执行步驟 506;
步驟 503: 确定载波的负荷级别;
具体方法为, 以载波的负荷级别最低的载扇的负荷级别, 作为该载波 的负荷级别。
步驟 504: 根据载波的负荷级别, 将载波划分为不同的集合;
该实施例中, 根据载波的负荷级别, 将载波划分为不同的集合, 可以 根据实际情况采用不同的划分方案, 例如可以采用以下三种方案:
第一种方案为:
将载波划分为三个集合, 分别为 Sl、 S2和 S3 , 其中, S1为最低负荷 的载扇的负荷级别为 0或 1的载波的集合; S2为最低负荷的载扇的负荷级 别为 2的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。 第二种方案为:
将载波划分为四个集合, 分别为 S0、 Sl、 S2和 S3 , 其中, SO为所有 载扇的负荷级别均为 0或 1的载波的集合; S1为最低负荷的载扇的负荷级 别为 0或 1 , 但也包含负荷级别大于 1的载扇的载波的集合; S2为最低负 荷的载扇的负荷级别为 2, 但也包含负荷级别大于 的载扇的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。
第三种方案为:
将载波划分为三个集合, 分别为 S0、 SI和 S2, 其中, SO为所有载扇 的负荷级别均为 0或 1的载波的集合; S1为最低负荷的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的集合; S2为最低负荷的载 扇的负荷级别为 2或 3的载波的集合。
步驟 505: 在载波的各集合中, 以优先选择负荷最轻的载波的原则, 选 出可用载波, 执行步驟 508;
例如, 设步驟 504 中以第二种方案将载波划分为不同的集合, 则步驟
505中, 从 S0、 Sl、 S2和 S3四个集合中选择可用载波。
步驟 506: 以载波的负荷级别最高的载扇的负荷级别, 确定载波的负荷 级别, 并根据载波的负荷级别, 按照现有技术中的 SCM方法将载波划分为 Sl、 S2和 S3三个集合;
步驟 507: 从 Sl、 S2和 S3三个集合中选择可用载波;
步驟 508: AT与 AN在选择的可用载波上建立连接;
步驟 509: 判断是否启动 NLB功能, 如果启动, 则执行步驟 510, 如 果未启动, 则执行步驟 511;
步驟 510: 使用 NLB功能来辅助虚拟切换, 结束处理流程;
步驟 511: 依靠 AT的传统算法执行虚拟切换。 上述步驟 510和步驟 511完成后, 按照现有技术中的规定进行后续操 作, 比如根据实际情况释放已建立的连接, 这里不做赘述。
采用上述本发明方法, 在 EVDO-REVB 的多载波网络上叠加 DO Advance ( DO增强 )技术时, DO Advance中的 SCM和 NLB这两个功能实 体在运行中, 能够相互参考以提高 DO Advance技术的整体增益。 本发明方 法中新的 SCM策略只在 NLB功能开启的情况下启用。
图 6为本发明实施例的智能载波管理装置结构示意图, 如图 6所示, 该实施例中, 本发明智能载波管理装置包括负荷级别确定模块 601、 集合划 分模块 602、 载波选择模块 603和虚拟切换模块 604。
具体地, 负荷级别确定模块 601用于确定载波的负荷级别。
本发明实施例中, 负荷级别确定模块 601 , 用于确定载波的负荷级别, 采用的方案为: 以载波的负荷级别最低的载扇的负荷级别, 作为该载波的 负荷级别; 为集合划分模块 602提供载波的负荷级别;
集合划分模块 602,用于根据负荷级别确定模块 601提供的载波的负荷 级别, 将载波划分为不同的集合。
该实施例中, 集合划分模块 602, 具体用于根据载波的负荷级别, 将载 波划分为不同的集合, 可以根据实际情况采用不同的划分方案, 例如可以 采用以下三种方案:
第一种方案为:
将载波划分为三个集合, 分别为 Sl、 S2和 S3 , 其中, S1为最低负荷 的载扇的负荷级别为 0或 1的载波的集合; S2为最低负荷的载扇的负荷级 别为 2的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。
第二种方案为:
将载波划分为四个集合, 分别为 S0、 Sl、 S2和 S3 , 其中, SO为所有 载扇的负荷级别均为 0或 1的载波的集合; S1为最低负荷的载扇的负荷级 别为 0或 1 , 但也包含负荷级别大于 1的载扇的载波的集合; S2为最低负 荷的载扇的负荷级别为 2, 但也包含负荷级别大于 的载扇的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。
第三种方案为:
将载波划分为三个集合, 分别为 S0、 SI和 S2, 其中, SO为所有载扇 的负荷级别均为 0或 1的载波的集合; S1为最低负荷的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的集合; S2为最低负荷的载 扇的负荷级别为 2或 3的载波的集合。
载波选择模块 603, 用于在集合划分模块 602提供的载波的各集合中, 以优先选择负荷最轻的载波的原则, 选出可用载波, 并且 AT与 AN在该载 波上建立连接。
虚拟切换模块 604,用于收到载波选择模块 603发来的已建立连接的通 知后, 采用 NLB功能辅助进行前向虚拟切换; 相应的, 所述载波选择模块 603, 还用于在选出的载波上建立连接后, 通知虚拟切换模块 604已建立连 接。
尽管为示例目的, 已经公开了本发明的优选实施例, 本领域的技术人 员将意识到各种改进、 增加和取代也是可能的, 因此, 本发明的范围应当 不限于上述实施例。

Claims

权利要求书
1、 一种智能载波管理方法, 应用于支持网络负荷均衡 NLB 功能且该 功能开启的接入网中, 其特征在于, 该方法包括:
确定载波的负荷级别;
根据载波的负荷级别, 将载波划分为不同的集合;
在载波的各集合中, 以优先选择负荷最轻的载波的原则, 选出可用载 波, 并且接入终端与接入网在该载波上建立连接;
其中, 所述确定载波的负荷级别为: 以载波的负荷级别最低的载扇的 负荷级别作为该载波的负荷级别。
2、如权利要求 1所述的方法, 其特征在于, 所述根据载波的负荷级别, 将载波划分为不同的集合, 包括:
将载波划分为三个集合, 分别为 Sl、 S2和 S3;
其中, S1为最低负荷的载扇的负荷级别为 0或 1的载波的集合; S2为 最低负荷的载扇的负荷级别为 2的载波的集合; S3为最低负荷的载扇的负 荷级别为 3的载波的集合。
3、如权利要求 1所述的方法, 其特征在于, 所述根据载波的负荷级别, 将载波划分为不同的集合, 包括:
将载波划分为四个集合, 分别为 S0、 Sl、 S2和 S3;
其中, SO为所有载扇的负荷级别均为 0或 1的载波的集合; S1为最低 负荷的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的 集合; S2为最低负荷的载扇的负荷级别为 2, 但也包含负荷级别大于 的 载扇的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。
4、如权利要求 1所述的方法, 其特征在于, 所述根据载波的负荷级别, 将载波划分为不同的集合, 包括:
将载波划分为三个集合, 分别为 S0、 SI和 S2; 其中, SO为所有载扇的负荷级别均为 0或 1的载波的集合; S1为最低 负荷的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的 集合; S2为最低负荷的载扇的负荷级别为 2或 3的载波的集合。
5、 如权利要求 1至 4中任一项所述的方法, 其特征在于, 所述接入终 端与接入网在该载波上建立连接之后, 该方法还包括:
采用 NLB功能辅助进行前向虚拟切换。
6、 一种智能载波管理装置, 应用于支持网络负荷均衡 NLB 功能且该 功能开启的接入网中, 其特征在于, 该装置包括:
负荷级别确定模块, 用于确定载波的负荷级别, 为集合划分模块提供 载波的负荷级别;
集合划分模块, 用于根据负荷级别确定模块提供的载波的负荷级别, 将载波划分为不同的集合, 为载波选择模块提供载波的各集合;
载波选择模块, 用于在集合划分模块提供的载波的各集合中, 以优先 选择负荷最轻的载波的原则, 选出可用载波, 并且接入终端与接入网在该 载波上建立连接;
其中, 所述负荷级别确定模块, 具体用于确定载波的负荷级别时, 以 载波的负荷级别最低的载扇的负荷级别作为该载波的负荷级别。
7、 如权利要求 6所述的装置, 其特征在于,
所述集合划分模块, 具体用于在根据载波的负荷级别, 将载波划分为 不同的集合时, 将载波划分为三个集合, 分别为 Sl、 S2和 S3;
其中, S1为最低负荷的载扇的负荷级别为 0或 1的载波的集合; S2为 最低负荷的载扇的负荷级别为 2的载波的集合; S3为最低负荷的载扇的负 荷级别为 3的载波的集合。
8、 如权利要求 6所述的装置, 其特征在于,
所述集合划分模块, 具体用于在根据载波的负荷级别, 将载波划分为 不同的集合时, 将载波划分为四个集合, 分别为 S0、 Sl、 S2和 S3;
其中, SO为所有载扇的负荷级别均为 0或 1的载波的集合; S1为最低 负荷的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的 集合; S2为最低负荷的载扇的负荷级别为 2, 但也包含负荷级别大于 的 载扇的载波的集合; S3为最低负荷的载扇的负荷级别为 3的载波的集合。
9、 如权利要求 6所述的装置, 其特征在于,
所述集合划分模块, 具体用于在根据载波的负荷级别, 将载波划分为 不同的集合时, 将载波划分为三个集合, 分别为 S0、 SI和 S2;
其中, SO为所有载扇的负荷级别均为 0或 1的载波的集合; S1为最低 负荷的载扇的负荷级别为 0或 1 ,但也包含负荷级别大于 1的载扇的载波的 集合; S2为最低负荷的载扇的负荷级别为 2或 3的载波的集合。
10、 如权利要求 6至 9中任一项所述的装置, 其特征在于, 所述装置 还包括: 虚拟切换模块, 用于收到载波选择模块发来的已建立连接的通知 后, 采用 NLB功能辅助进行前向虚拟切换;
相应的, 所述载波选择模块, 还用于在选出的载波上建立连接后, 通 知虚拟切换模块已建立连接。
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