CN105282797B - Method and device for closed subscriber group cell reselection - Google Patents
Method and device for closed subscriber group cell reselection Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及长期演进(LTE,Long Term Evolution)移动通信技术领域,尤其涉及一种闭合用户组(CSG,Closed Subscriber Group)小区重选的方法及装置。The present invention relates to the technical field of Long Term Evolution (LTE, Long Term Evolution) mobile communication, in particular to a method and device for reselecting a Closed Subscriber Group (CSG, Closed Subscriber Group) cell.
背景技术Background technique
CSG是为家庭基站而引入的概念,使用家庭基站的人群被划分为一些用户群,有资格使用家庭基站提供服务的用户就被认为是用户群的成员,这些成员所组成的用户群被称为闭合用户群。CSG is a concept introduced for home base stations. People who use home base stations are divided into some user groups. Users who are eligible to use home base stations to provide services are considered members of the user group. The user group composed of these members is called closed user group.
CSG小区一般作为室外宏小区,即:非CSG小区的补充,增强室内覆盖,减轻室外宏小区的负荷,以提供更高的无线服务质量,因此,CSG小区的部署一般是在已有宏小区覆盖下进行的,然而,同一宏小区覆盖内签约使用家庭基站的用户也是动态变化的,有退订用户,也有新增用户,家庭基站的覆盖拓扑相对于宏小区覆盖的变动非常频繁,要完全将宏小区覆盖内所有CSG小区加入到宏小区的邻区关系中,并及时体系其变化,会导致持续的巨大的工作量。CSG cells are generally used as outdoor macro cells, that is, as a supplement to non-CSG cells, to enhance indoor coverage and reduce the load of outdoor macro cells to provide higher wireless service quality. Therefore, CSG cells are generally deployed in existing macro cells. However, the users who sign up to use the Femtocell within the coverage of the same macro cell also change dynamically. There are unsubscribed users and new users. All CSG cells within the coverage of the macro cell are added to the neighbor cell relationship of the macro cell, and the system changes in time, which will lead to a continuous and huge workload.
由于宏小区不具有覆盖区域内CSG小区的邻区关系信息,用户终端(UE,UserEquipment)无法按照第三代合作伙伴计划(3GPP,The 3rd Generation PartnershipProject)协议制定的利用邻区信息配置进行重选的方法自动重选到CSG小区。Since the macro cell does not have the neighbor cell relationship information of the CSG cell in the coverage area, the user terminal (UE, UserEquipment) cannot perform reselection using the neighbor cell information configuration according to the 3rd Generation Partnership Project (3GPP, The 3rd Generation Partnership Project) protocol The method automatically reselects to the CSG cell.
发明内容Contents of the invention
有鉴于此,本发明实施例期望提供一种CSG小区重选的方法及装置,能够提高UE自动重选到CSG小区的成功率,延长UE空闲态待机时间。In view of this, the embodiments of the present invention expect to provide a method and device for reselecting a CSG cell, which can improve the success rate of automatic reselection of a UE to a CSG cell and prolong the standby time of the UE in an idle state.
为达到上述目的,本发明的技术方案是这样实现的:In order to achieve the above object, technical solution of the present invention is achieved in that way:
本发明实施例提供了一种CSG小区重选的方法,所述方法包括:An embodiment of the present invention provides a method for reselecting a CSG cell, the method comprising:
UE将自身驻留的宏小区的全球小区识别码(CGI,Cell Global Identification)信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,匹配成功时,对匹配成功的邻区CGI列表对应的CSG小区频点进行测量;The UE matches the CGI (Cell Global Identification) information of the macro cell where it resides with the neighbor cell CGI list in the CSG cell information where the UE has historically camped. The CSG cell frequencies corresponding to the list are measured;
确定测量得到的物理小区身份识别码(ID,IDentity)在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内时,对所述物理小区进行测量评估,并在确定所述物理小区符合测量评估条件时,选择所述物理小区为驻留小区。When it is determined that the measured physical cell identity code (ID, IDentity) is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, perform measurement and evaluation on the physical cell, and determine that the physical cell meets When measuring and evaluating conditions, the physical cell is selected as the camping cell.
上述方案中,所述UE将自身驻留的宏小区的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配之前,所述方法还包括:UE驻留CSG小区,获取并保存所述CSG小区频点、所述CSG物理小区ID范围及所述CSG小区的邻区CGI列表。In the above solution, before the UE matches the CGI information of the macro cell where the UE is camped on with the neighbor cell CGI list in the CSG cell information where the UE has previously camped, the method further includes: the UE camps on the CSG cell, obtains and Save the frequency point of the CSG cell, the ID range of the CSG physical cell and the CGI list of the neighboring cells of the CSG cell.
上述方案中,所述UE获取所述CSG物理小区ID范围及所述CSG小区的邻区CGI列表包括:In the above solution, the UE obtaining the CSG physical cell ID range and the CSG cell neighbor CGI list includes:
所述UE提取系统信息块类型(SIB,System Information BlockType)4中的CSG物理小区ID范围及所述CSG小区的同频邻区CGI列表,并提取SIB5中所述CSG小区的异频邻区CGI列表,所述CSG小区的同频邻区CGI列表及所述CSG小区的异频邻区CGI列表共同组成所述CSG小区的邻区CGI列表;The UE extracts the CSG physical cell ID range in System Information Block Type (SIB, System Information BlockType) 4 and the same-frequency neighbor cell CGI list of the CSG cell, and extracts the inter-frequency neighbor cell CGI of the CSG cell in SIB5 A list, the CGI list of the same-frequency neighbors of the CSG cell and the CGI list of the different-frequency neighbors of the CSG cell together form the CGI list of the neighbors of the CSG cell;
其中,所述CSG小区的邻区CGI列表中包含的CGI信息包括:小区公共陆地移动网络身份标识(PLMN,Public Land Mobile Network)ID及小区身份标识CELL ID。Wherein, the CGI information contained in the neighboring cell CGI list of the CSG cell includes: a public land mobile network identity (PLMN, Public Land Mobile Network) ID of a cell and a cell ID of a cell.
上述方案中,所述测量评估条件为:所述物理小区频点为所述宏小区的异频频点,或者所述物理小区频点为所述宏小区的同频频点,且所述物理小区的信号质量高于所述宏小区的信号质量。In the above solution, the measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is the same frequency point of the macro cell, and the frequency point of the physical cell is The signal quality is higher than that of the macro cell.
本发明实施例还提供了一种CSG小区重选的装置,所述装置包括:匹配模块、测量模块;其中,The embodiment of the present invention also provides a CSG cell reselection device, the device includes: a matching module, a measurement module; wherein,
所述匹配模块,用于将UE驻留的宏小区的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,并在匹配成功时,触发测量模块;The matching module is configured to match the CGI information of the macro cell where the UE resides with the neighbor cell CGI list in the CSG cell information where the UE has historically resided, and trigger the measurement module when the matching is successful;
所述测量模块,用于对匹配成功的邻区CGI列表对应的CSG小区频点进行测量,确定测量得到的物理小区ID在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内时,对所述物理小区进行测量评估,并在确定所述物理小区符合测量评估条件时,选择所述物理小区为驻留小区。The measurement module is configured to measure the frequency point of the CSG cell corresponding to the successfully matched neighboring cell CGI list, and determine that when the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, Performing measurement evaluation on the physical cell, and selecting the physical cell as a camping cell when it is determined that the physical cell meets the measurement evaluation condition.
上述方案中,所述装置还包括:获取模块,用于当UE驻留CSG小区时,获取并保存所述CSG小区频点、所述CSG物理小区ID范围及所述CSG小区的邻区CGI列表。In the above solution, the device further includes: an acquisition module, configured to acquire and save the frequency point of the CSG cell, the ID range of the CSG physical cell, and the CGI list of neighboring cells of the CSG cell when the UE camps on the CSG cell .
上述方案中,所述获取模块获取所述CSG物理小区ID范围及所述CSG小区的邻区CGI列表包括:In the above solution, the acquisition module acquiring the CSG physical cell ID range and the CSG cell neighbor CGI list includes:
所述获取模块提取SIB4中的CSG物理小区ID范围及所述CSG小区的同频邻区CGI列表,并提取SIB5中所述CSG小区的异频邻区CGI列表;其中,所述CSG小区的同频邻区CGI列表及所述CSG小区的异频邻区CGI列表共同组成所述CSG小区的邻区CGI列表;The obtaining module extracts the CSG physical cell ID range in SIB4 and the same-frequency neighbor CGI list of the CSG cell, and extracts the different-frequency neighbor CGI list of the CSG cell in SIB5; wherein, the same-frequency neighbor CGI list of the CSG cell The frequency neighbor CGI list and the inter-frequency neighbor CGI list of the CSG cell together form the neighbor CGI list of the CSG cell;
其中,所述CSG小区的邻区CGI列表中包含的CGI信息包括:小区PLMN ID及CELLID。Wherein, the CGI information contained in the neighboring cell CGI list of the CSG cell includes: cell PLMN ID and CELLID.
上述方案中,所述测量评估条件为:所述物理小区频点为所述宏小区的异频频点,或者所述物理小区频点为所述宏小区的同频频点,且所述物理小区的信号质量高于所述宏小区的信号质量。In the above solution, the measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is the same frequency point of the macro cell, and the frequency point of the physical cell is The signal quality is higher than that of the macro cell.
本发明实施例所提供的CSG小区重选的方法及装置,UE将自身驻留的宏小区的CGI与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,匹配成功时,对匹配成功的邻区CGI列表对应的CSG小区频点进行测量;确定测量得到的物理小区ID在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内时,对所述物理小区进行测量评估,并在确定所述物理小区符合测量评估条件时,选择所述物理小区为驻留小区。如此,能保证UE在每次接近CSG小区时,在用户无感知的情况下,自动重选到CSG小区,提高UE自动重选到CSG小区的成功率,减少UE功耗从而增加UE空闲态待机时间。In the CSG cell reselection method and device provided by the embodiments of the present invention, the UE matches the CGI of the macro cell where it resides with the CGI list of neighboring cells in the CSG cell information where the UE has historically resided. Measure the frequency of the CSG cell corresponding to the successful neighbor cell CGI list; when it is determined that the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, perform measurement and evaluation on the physical cell, And when it is determined that the physical cell meets the measurement evaluation condition, select the physical cell as the cell to reside on. In this way, it can ensure that the UE automatically reselects to the CSG cell every time it approaches the CSG cell without the user's perception, improves the success rate of the UE's automatic reselection to the CSG cell, reduces UE power consumption and increases UE idle state standby time.
附图说明Description of drawings
图1为本发明实施例一CSG小区重选的方法流程示意图;FIG. 1 is a schematic flowchart of a method for CSG cell reselection according to Embodiment 1 of the present invention;
图2为本发明实施例二CSG小区重选的方法流程示意图;FIG. 2 is a schematic flowchart of a method for reselecting a CSG cell according to Embodiment 2 of the present invention;
图3为本发明实施例宏小区及CSG小区的拓扑关系示意图;FIG. 3 is a schematic diagram of a topological relationship between a macro cell and a CSG cell according to an embodiment of the present invention;
图4为本发明实施例三CSG小区重选的方法流程示意图;FIG. 4 is a schematic flowchart of a method for reselecting a CSG cell according to Embodiment 3 of the present invention;
图5为本发明实施例四CSG小区重选的方法流程示意图;FIG. 5 is a schematic flowchart of a method for reselecting a CSG cell according to Embodiment 4 of the present invention;
图6为本发明实施例CSG小区重选的装置组成结构示意图。FIG. 6 is a schematic diagram of the composition and structure of an apparatus for CSG cell reselection according to an embodiment of the present invention.
具体实施方式Detailed ways
图1为本发明实施例一CSG小区重选的方法流程示意图,如图1所示,本实施例CSG小区重选的方法包括:Figure 1 is a schematic flow chart of a method for reselecting a CSG cell according to Embodiment 1 of the present invention. As shown in Figure 1 , the method for reselecting a CSG cell in this embodiment includes:
步骤101:UE将自身驻留的宏小区的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,匹配成功时,对匹配成功的邻区CGI列表对应的CSG小区频点进行测量;Step 101: The UE matches the CGI information of the macro cell where it is camped on with the neighboring cell CGI list in the CSG cell information where the UE has previously camped. take measurements;
本步骤之前,所述方法还包括:UE驻留CSG小区,获取所述CSG小区的相关信息,并保存所述CSG小区的相关信息至UE历史驻留的CSG小区信息(CsgHistoryInfo)中,同时写入非易失性存储器,如此,UE关机后上述CSG小区的相关信息不会丢失,下次开机后仍可读取使用;Before this step, the method further includes: the UE camps on a CSG cell, obtains relevant information of the CSG cell, and saves the relevant information of the CSG cell to the CSG cell information (CsgHistoryInfo) where the UE has historically resided, and simultaneously writes In this way, the relevant information of the above-mentioned CSG cell will not be lost after the UE is powered off, and can still be read and used after the next boot;
其中,所述CSG小区的相关信息包括:CSG小区频点(CsgEarfcn)、CSG ID、CSG小区的PLMN ID、CSG物理小区ID范围(CsgPhysCellIdRange)及CSG小区的邻区CGI列表;Wherein, the relevant information of the CSG cell includes: CSG cell frequency point (CsgEarfcn), CSG ID, PLMN ID of the CSG cell, CSG physical cell ID range (CsgPhysCellIdRange) and a neighbor cell CGI list of the CSG cell;
相应的,所述UE历史驻留的CSG小区信息包括:UE历史驻留的CSG小区频点、CSGID、CSG小区的PLMNID、CSG物理小区ID范围及CSG小区的邻区CGI列表;Correspondingly, the CSG cell information where the UE has historically camped includes: the CSG cell frequency point, CSGID, CSG cell PLMNID, CSG physical cell ID range, and CSG cell neighbor CGI list of the CSG cell where the UE has historically camped;
这里,UE第一次驻留某CSG小区,要求用户通过手动CSG选择方式驻留到允许的CSG小区;或者,UE设置成自动CSG选择方式,且UE开机后CSG小区为最强覆盖,UE在开机初始驻留过程中,会选择覆盖最强的CSG小区驻留;Here, when the UE camps on a CSG cell for the first time, the user is required to camp on an allowed CSG cell through manual CSG selection; or, the UE is set to the automatic CSG selection mode, and the CSG cell has the strongest coverage after the UE is powered on. During the initial camping process at startup, the CSG cell with the strongest coverage will be selected for camping;
所述UE获取所述CSG物理小区ID范围及所述CSG小区的邻区CGI列表包括:The acquisition by the UE of the CSG physical cell ID range and the neighbor cell CGI list of the CSG cell includes:
所述UE提取SIB4中的CSG物理小区ID范围及所述CSG小区的同频邻区CGI列表,并提取SIB5中的所述CSG小区的异频邻区CGI列表;其中,所述CSG小区的同频邻区CGI列表及所述CSG小区的异频邻区CGI列表共同组成所述CSG小区的邻区CGI列表,所述CSG小区的邻区CGI列表最多可保存N个所述CSG小区的邻区CGI信息,N为正整数,N值可根据实际情况设定;The UE extracts the CSG physical cell ID range in SIB4 and the same-frequency neighboring cell CGI list of the CSG cell, and extracts the different-frequency neighboring cell CGI list of the CSG cell in SIB5; wherein, the same-frequency neighboring cell CGI list of the CSG cell The CGI list of frequency neighbors and the CGI list of inter-frequency neighbors of the CSG cell together form the CGI list of neighbors of the CSG cell, and the CGI list of neighbors of the CSG cell can store up to N neighbors of the CSG cell CGI information, N is a positive integer, and the value of N can be set according to the actual situation;
这里,所述CSG小区的邻区CGI列表中包含的CGI信息包括:小区PLMN ID及CELLID。Here, the CGI information contained in the neighboring cell CGI list of the CSG cell includes: cell PLMN ID and CELLID.
进一步的,UE获取CSG物理小区ID范围及CSG小区的邻区CGI列表之前,所述方法还包括:分别在SIB4及SIB5中增加小区身份标识(cellIdentity)信元,并设定所述小区身份标识信元仅对CSG小区为必选项,如此,不影响现有普通宏小区的系统信息SIB4的配置,在部署CSG小区时,增加CSG小区的同频邻区CGI信息至SIB4中的同频邻区列表,增加CSG小区的异频邻区CGI信息至SIB5中的异频邻区列表;增加所述小区身份标识信元后的SIB4的同频邻区列表结构及SIB5的异频邻区列表结构中均包括:physCellId信元、q-OffsetCell信元及cellIdentity信元;Further, before the UE acquires the CSG physical cell ID range and the CSG cell neighbor CGI list, the method further includes: adding cell identity (cellIdentity) information elements in SIB4 and SIB5 respectively, and setting the cell identity The information element is only mandatory for CSG cells. In this way, it does not affect the configuration of the system information SIB4 of the existing common macro cells. When deploying CSG cells, add the CGI information of the same-frequency adjacent cells of the CSG cell to the same-frequency adjacent cells in SIB4. List, add the CGI information of the inter-frequency adjacent cell of the CSG cell to the inter-frequency adjacent cell list in SIB5; add the same-frequency adjacent cell list structure of SIB4 and the inter-frequency adjacent cell list structure of SIB5 after adding the cell identity information element All include: physCellId information element, q-OffsetCell information element and cellIdentity information element;
这里,需要说明的是,上述UE选择并接入至宏小区之前的操作,仅需在初次使用本发明CSG小区重选的方法过程中执行即可,即只需UE已保存CSG小区的相关信息即可,后续在UE进行CSG小区重选中可直接使用。Here, it should be noted that the above operation before the UE selects and accesses the macro cell only needs to be performed during the initial use of the CSG cell reselection method of the present invention, that is, only the UE has saved the relevant information of the CSG cell That is, it can be directly used in subsequent CSG cell reselection by the UE.
进一步的,UE将所述宏小区的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,如果匹配成功,则说明匹配成功的邻区CGI列表中存有所述宏小区的CGI信息,也就可以表明,此宏小区为匹配成功的邻区CGI列表对应的CSG小区的邻区;Further, the UE matches the CGI information of the macro cell with the neighboring cell CGI list in the CSG cell information where the UE has historically resided, and if the matching is successful, it means that the macro cell exists in the successfully matched neighboring cell CGI list CGI information, it can also indicate that the macro cell is a neighboring cell of the CSG cell corresponding to the successfully matched neighboring cell CGI list;
所述对匹配成功的邻区CGI列表对应的CSG小区频点进行测量包括:检测在所述CSG小区频点上的物理小区ID。The measuring the frequency point of the CSG cell corresponding to the CGI list of the neighboring cell that is successfully matched includes: detecting the physical cell ID on the frequency point of the CSG cell.
步骤102:确定测量得到的物理小区ID在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内时,对所述物理小区进行测量评估,并在确定所述物理小区符合测量评估条件时,选择所述物理小区为驻留小区;Step 102: When it is determined that the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, perform measurement and evaluation on the physical cell, and when it is determined that the physical cell meets the measurement evaluation conditions , selecting the physical cell as the resident cell;
这里,当UE检测到所述CSG小区频点上存在物理小区ID,且确定测量得到的物理小区ID在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内时,则表明此物理小区为CSG小区,可开启对此物理小区的测量评估;Here, when the UE detects that there is a physical cell ID on the frequency point of the CSG cell, and determines that the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped, it indicates that the physical cell For a CSG cell, the measurement and evaluation of this physical cell can be enabled;
所述测量评估条件为:所述物理小区频点为所述宏小区的异频频点,或者所述物理小区频点为所述宏小区的同频频点,且所述物理小区的信号质量高于所述宏小区的信号质量。The measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is the same frequency point of the macro cell, and the signal quality of the physical cell is higher than The signal quality of the macro cell.
图2为本发明实施例二CSG小区重选的方法流程示意图,在本发明实施例中,UE已经驻留过CSG小区,并保存了所述CSG小区的相关信息至UE历史驻留的CSG小区信息中,UE处于空闲态,随着UE的移动会选择到信号更好的宏小区上,如图2所示,本实施例CSG小区重选的方法包括:Fig. 2 is a schematic flow chart of the CSG cell reselection method in Embodiment 2 of the present invention. In the embodiment of the present invention, the UE has already camped in the CSG cell, and has saved the relevant information of the CSG cell to the CSG cell where the UE has historically camped. In the information, the UE is in an idle state, and as the UE moves, it will select a macro cell with better signal, as shown in Figure 2, the CSG cell reselection method in this embodiment includes:
步骤201:UE选择并接入至宏小区;Step 201: UE selects and accesses a macro cell;
这里,UE可以采用现有接入方法选择并接入至宏小区。Here, the UE may select and access the macro cell by using an existing access method.
步骤202:将所述宏小区的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,并判断匹配是否成功,确定匹配成功时,执行步骤203;匹配失败时,执行步骤207;Step 202: Match the CGI information of the macro cell with the neighbor cell CGI list in the CSG cell information where the UE has historically resided, and judge whether the matching is successful. If the matching is successful, perform step 203; when the matching fails, perform step 202: 207;
这里,将所述宏小区的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,如果匹配成功,则说明匹配成功的邻区CGI列表中存有所述宏小区的CGI信息,也就可以表明,此宏小区为匹配成功的邻区CGI列表对应的CSG小区的邻区。Here, the CGI information of the macro cell is matched with the neighboring cell CGI list in the CSG cell information where the UE has historically resided, and if the matching is successful, it means that the CGI of the macro cell is stored in the successfully matched neighboring cell CGI list information, that is, it can indicate that the macro cell is a neighboring cell of the CSG cell corresponding to the successfully matched neighboring cell CGI list.
步骤203:对匹配成功的邻区CGI列表对应的CSG小区频点进行测量,并判断测量得到的物理小区ID是否在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内,如果在CSG物理小区ID范围内,执行步骤204;否则,执行步骤207;Step 203: Measure the frequency point of the CSG cell corresponding to the CGI list of the neighboring cell that is successfully matched, and judge whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped. Within the physical cell ID range, execute step 204; otherwise, execute step 207;
这里,当检测到匹配成功的邻区CGI列表对应的CSG小区频点上的物理小区ID在CSG物理小区ID范围内时,则表明此物理小区为CSG小区,可开启对所述物理小区的测量评估。Here, when it is detected that the physical cell ID on the frequency point of the CSG cell corresponding to the CGI list of the neighboring cell that matches successfully is within the range of the CSG physical cell ID, it indicates that the physical cell is a CSG cell, and the measurement of the physical cell can be started Evaluate.
步骤204:判断所述物理小区是否为所述宏小区的同频频点,如果是,执行步骤205;如果不是,执行步骤206。Step 204: Determine whether the physical cell is the same frequency point of the macro cell, if yes, perform step 205; if not, perform step 206.
步骤205:判断所述物理小区的信号质量是否高于所述宏小区的信号质量,如果是,执行步骤206;否则执行步骤207。Step 205: Determine whether the signal quality of the physical cell is higher than the signal quality of the macro cell, if yes, perform step 206; otherwise, perform step 207.
步骤206:UE选择所述物理小区为驻留小区;Step 206: UE selects the physical cell as the cell to camp on;
这里,UE驻留所述物理小区的具体操作包括读取小区系统信息,匹配CSG ID等。Here, specific operations for the UE to camp on the physical cell include reading cell system information, matching CSG ID, and the like.
步骤207:结束本次处理流程;Step 207: End this processing flow;
这里,UE未重选到CSG小区,可进行宏小区同频/异频的测量评估及重选过程。Here, the UE has not been reselected to the CSG cell, and can perform the same-frequency/different-frequency measurement evaluation and reselection process of the macro cell.
图3为本发明实施例宏小区及CSG小区的拓扑关系示意图,如图3所示,包括一个CSG小区(CELL_CSG)和三个宏小区(CELL_1,CELL_2,CELL_3),各小区信息如下表所示:Figure 3 is a schematic diagram of the topological relationship between a macro cell and a CSG cell according to an embodiment of the present invention. As shown in Figure 3, it includes a CSG cell (CELL_CSG) and three macro cells (CELL_1, CELL_2, CELL_3), and the information of each cell is shown in the following table :
表1Table 1
图3中三个大六边形分别表示CELL_1、CELL_2、CELL_3的无线覆盖范围,小六边形表示CELL_CSG的无线覆盖范围,其中CELL_CSG与CELL_1为同频,CELL_CSG与CELL_2为异频,CELL_CSG的无线覆盖范围一部分和CELL_1重叠,另一部分和CELL_2重叠,因此,配置CELL_CSG小区邻区信息时,SIB4的同频邻区列表中包括同频邻区CELL_1的CGI中的cellIdentity1,SIB5的异频邻区列表中包括同频邻区CELL_2的CGI中的cellIdentity2,进而,当UE驻留所述CELL_CSG时,UE历史驻留的CSG小区信息中包括:所述CELL_CSG频点、PLMNID、CSG ID、CSG物理小区ID范围、及所述CELL_CSG的邻区CGI列表;其中,所述CELL_CSG的邻区CGI列表中包括宏小区CELL_1及CELL_2的CGI信息。In Figure 3, the three large hexagons represent the wireless coverage of CELL_1, CELL_2, and CELL_3, and the small hexagon represents the wireless coverage of CELL_CSG, where CELL_CSG and CELL_1 are of the same frequency, CELL_CSG and CELL_2 are of different frequencies, and the wireless coverage of CELL_CSG is Part of the coverage area overlaps with CELL_1, and the other part overlaps with CELL_2. Therefore, when configuring CELL_CSG cell neighbor cell information, the same-frequency neighbor cell list of SIB4 includes cellIdentity1 in the CGI of the same-frequency neighbor cell CELL_1, and the inter-frequency neighbor cell list of SIB5 Include the cellIdentity2 in the CGI of the same-frequency neighbor cell CELL_2, and then, when the UE camps on the CELL_CSG, the CSG cell information that the UE has historically camped on includes: the CELL_CSG frequency point, PLMNID, CSG ID, and CSG physical cell ID range, and the CGI list of the neighboring cells of the CELL_CSG; wherein, the CGI list of the neighboring cells of the CELL_CSG includes the CGI information of the macro cells CELL_1 and CELL_2.
图4为本发明实施例三CSG小区重选的方法流程示意图,结合图3,在本发明实施例中,UE已经驻留过CELL_CSG并保存了所述CELL_CSG的相关信息至UE历史驻留的CSG小区信息中,UE处于空闲态,按照顺序依次移动至CELL_1、CELL_3、CELL_2,并再次移动至CELL_CSG,如图4所示,本实施例CSG小区重选的方法包括:Fig. 4 is a schematic flow diagram of a method for reselecting a CSG cell in Embodiment 3 of the present invention. In combination with Fig. 3 , in the embodiment of the present invention, the UE has already camped in CELL_CSG and saved the relevant information of the CELL_CSG to the CSG where the UE has previously camped. In the cell information, the UE is in an idle state, moves to CELL_1, CELL_3, CELL_2 in sequence, and moves to CELL_CSG again, as shown in Figure 4, the method for CSG cell reselection in this embodiment includes:
步骤401:UE移动并驻留至宏小区CELL_1;Step 401: UE moves and camps on macro cell CELL_1;
这里,UE可以采用现有接入方法驻留至宏小区CELL_1。Here, the UE may use an existing access method to camp on the macro cell CELL_1.
步骤402:将所述宏小区CELL_1的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配;Step 402: Match the CGI information of the macro cell CELL_1 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;
这里,由于CELL_CSG的邻区CGI列表中存有所述宏小区CELL_1的CGI,因此匹配成功,表明CELL_1为所述CELL_CSG的邻区。Here, since the CGI of the macro cell CELL_1 is stored in the neighboring cell CGI list of CELL_CSG, the matching is successful, indicating that CELL_1 is a neighboring cell of the CELL_CSG.
步骤403:对所述CELL_CSG频点进行测量,并判断测量得到的物理小区ID是否在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内;Step 403: Measure the CELL_CSG frequency point, and determine whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped;
这里,由于测得的为信号质量逐渐变弱的CELL_CSG的小区ID,所述CELL_CSG的小区ID在所述CSG物理小区ID范围内。Here, since the measured cell ID is the cell ID of the CELL_CSG whose signal quality gradually becomes weaker, the cell ID of the CELL_CSG is within the range of the CSG physical cell ID.
步骤404:判断所述CELL_CSG频点是否为所述CELL_1的同频频点;Step 404: judging whether the CELL_CSG frequency point is the same frequency point of the CELL_1;
这里,所述CELL_CSG频点为所述CELL_1的同频频点。Here, the CELL_CSG frequency point is the same-frequency frequency point of the CELL_1.
步骤405:判断所述CELL_CSG的信号质量是否高于所述CELL_1的信号质量;Step 405: judging whether the signal quality of the CELL_CSG is higher than the signal quality of the CELL_1;
这里,由于UE已于所述CELL_CSG移动至CELL_1,因此,所述CELL_1的信号质量高于所述CELL_CSG的信号质量,因此,UE不会重选至所述CELL_CSG。Here, since the UE has moved to CELL_1 in the CELL_CSG, the signal quality of the CELL_1 is higher than that of the CELL_CSG, therefore, the UE will not reselect to the CELL_CSG.
步骤406:UE移动并驻留至宏小区CELL_3;Step 406: The UE moves and camps on the macro cell CELL_3;
这里,UE可以采用现有接入方法驻留至宏小区CELL_3。Here, the UE may use an existing access method to camp on the macro cell CELL_3.
步骤407:将所述宏小区CELL_3的CGI与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配;Step 407: Match the CGI of the macro cell CELL_3 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;
这里,由于CELL_CSG的邻区CGI列表中不含有所述CELL_3的CGI,因此,匹配失败,表明所述宏小区CELL_3不是CELL_CSG的邻区,因此,UE不会重选至所述CELL_3。Here, since the CGI list of the neighboring cell of CELL_CSG does not contain the CGI of CELL_3, the matching fails, indicating that the macro cell CELL_3 is not a neighboring cell of CELL_CSG, and therefore, the UE will not reselect to the CELL_3.
步骤408:UE移动并驻留至宏小区CELL_2;Step 408: The UE moves and camps on the macro cell CELL_2;
这里,UE可以采用现有接入方法驻留至宏小区CELL_2。Here, the UE may use an existing access method to camp on the macro cell CELL_2.
步骤409:将所述CELL_2的CGI与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配;Step 409: Match the CGI of CELL_2 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;
这里,由于CELL_CSG的邻区CGI列表中存有所述宏小区CELL_2的CGI,因此匹配成功,表明宏小区CELL_2为所述CELL_CSG的邻区。Here, since the CGI of the macro cell CELL_2 is stored in the neighboring cell CGI list of CELL_CSG, the matching is successful, indicating that the macro cell CELL_2 is a neighboring cell of the CELL_CSG.
步骤410:对所述CELL_CSG频点进行测量,并判断测量得到的物理小区ID是否在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内;Step 410: Measure the CELL_CSG frequency point, and judge whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped;
这里,由于UE在从宏小区CELL_2的覆盖范围到CELL_CSG的覆盖范围的移动过程中,CELL_CSG的信号逐渐变好,UE终会在f1上检测到CELL_CSG的物理小区ID,所述CELL_CSG的物理小区ID在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内。Here, since the UE is moving from the coverage of the macro cell CELL_2 to the coverage of CELL_CSG, the signal of CELL_CSG gradually becomes better, and the UE will eventually detect the physical cell ID of CELL_CSG on f1, and the physical cell ID of CELL_CSG Within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped.
步骤411:判断所述CELL_CSG是否为所述CELL_2的同频频点;Step 411: judging whether the CELL_CSG is the same-frequency frequency point of the CELL_2;
这里,CELL_CSG频点为所述CELL_2的异频频点。Here, the CELL_CSG frequency point is a different frequency point of the CELL_2.
步骤412:UE选择所述CELL_CSG为驻留小区。Step 412: UE selects the CELL_CSG as the cell to camp on.
图5为本发明实施例四CSG小区重选的方法流程示意图,结合图3,在本发明实施例中,UE已经驻留过CSG小区,并保存了所述CSG小区的相关信息至UE历史驻留的CSG小区信息中,UE处于空闲态,按照顺序依次移动至CELL_2、CELL_3、CELL_1,并再次移动到CELL_CSG,如图5所示,本实施例CSG小区重选的方法包括:FIG. 5 is a schematic flow diagram of a method for reselecting a CSG cell according to Embodiment 4 of the present invention. With reference to FIG. 3 , in this embodiment of the present invention, the UE has already camped in a CSG cell, and has saved the relevant information of the CSG cell to the UE history camping In the remaining CSG cell information, the UE is in an idle state, moves to CELL_2, CELL_3, CELL_1 in sequence, and moves to CELL_CSG again, as shown in Figure 5, the CSG cell reselection method in this embodiment includes:
步骤501:UE移动并驻留至宏小区CELL_2;Step 501: UE moves and camps on macro cell CELL_2;
这里,UE可以采用现有接入方法驻留至宏小区CELL_2。Here, the UE may use an existing access method to camp on the macro cell CELL_2.
步骤502:将所述宏小区CELL_2的CGI与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配;Step 502: Match the CGI of the macro cell CELL_2 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;
这里,由于CELL_CSG的邻区CGI列表中存有所述宏小区CELL_2的CGI,因此匹配成功,表明CELL_2为所述CELL_CSG的邻区。Here, since the CGI of the macro cell CELL_2 is stored in the neighboring cell CGI list of CELL_CSG, the matching is successful, indicating that CELL_2 is the neighboring cell of the CELL_CSG.
步骤503:进行对所述CELL_CSG频点的测量,并判断测量得到的物理小区ID是否在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内;Step 503: Perform measurement on the CELL_CSG frequency point, and determine whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped;
这里,由于测得的为信号质量逐渐变弱的CELL_CSG的物理小区ID,所述CELL_CSG的物理小区ID在所述CSG物理小区ID范围内。Here, since the measured physical cell ID of the CELL_CSG whose signal quality gradually becomes weaker, the physical cell ID of the CELL_CSG is within the range of the CSG physical cell ID.
步骤504:判断所述CELL_CSG频点是否为所述CELL_2的同频频点;Step 504: judging whether the CELL_CSG frequency point is the same frequency point of the CELL_2;
这里,所述CELL_CSG频点为所述CELL_2的异频频点。Here, the CELL_CSG frequency point is a different frequency point of the CELL_2.
步骤505:UE选择所述CELL_CSG为驻留小区;Step 505: UE selects the CELL_CSG as the cell to camp on;
这里,随着UE远离CELL_CSG,当在所述CELL_CSG频点上测量不到CELL_CSG时,才不会重选回所述CELL_CSG。Here, as the UE moves away from the CELL_CSG, when the CELL_CSG cannot be measured on the CELL_CSG frequency point, it will not reselect to the CELL_CSG.
步骤506:UE移动并驻留至宏小区CELL_3;Step 506: The UE moves and camps on the macro cell CELL_3;
这里,UE可以采用现有接入方法驻留至宏小区CELL_3。Here, the UE may use an existing access method to camp on the macro cell CELL_3.
步骤507:将所述宏小区CELL_3的CGI与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配;Step 507: Match the CGI of the macro cell CELL_3 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;
这里,由于所述CELL_CSG的邻区CGI列表中不含有所述CELL_3的CGI,因此,匹配失败,表明所述宏小区CELL_3不是CELL_CSG的邻区,因此,UE不会重选至所述CELL_3。Here, since the CGI list of the neighboring cell of the CELL_CSG does not contain the CGI of the CELL_3, the matching fails, indicating that the macro cell CELL_3 is not a neighboring cell of the CELL_CSG, and therefore, the UE will not reselect to the CELL_3.
步骤508:UE移动并驻留至宏小区CELL_1。Step 508: The UE moves and camps on the macro cell CELL_1.
步骤509:将所述宏小区CELL_1的CGI与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配;Step 509: Match the CGI of the macro cell CELL_1 with the neighbor cell CGI list in the CSG cell information where the UE has historically camped;
这里,由于所述CELL_CSG的邻区CGI列表中存有所述宏小区CELL_1的CGI,因此匹配成功,表明宏小区CELL_1为所述CELL_CSG的邻区。Here, since the CGI of the macro cell CELL_1 is stored in the neighboring cell CGI list of the CELL_CSG, the matching is successful, indicating that the macro cell CELL_1 is a neighboring cell of the CELL_CSG.
步骤510:对所述CELL_CSG频点进行测量,并判断测量得到的物理小区ID是否在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内;Step 510: Measure the CELL_CSG frequency point, and determine whether the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically camped;
这里,由于UE在从宏小区CELL_1的覆盖范围到CELL_CSG的覆盖范围的移动过程中,CELL_CSG的信号变好,UE终会在f1上检测到CELL_CSG的物理小区ID,所述CELL_CSG的物理小区ID在所述CSG物理小区ID范围内。Here, since the UE moves from the coverage of the macro cell CELL_1 to the coverage of CELL_CSG, the signal of CELL_CSG becomes better, and the UE will eventually detect the physical cell ID of CELL_CSG on f1, and the physical cell ID of CELL_CSG is in Within the range of the CSG physical cell ID.
步骤511:判断所述CELL_CSG频点是否为所述CELL_1的同频频点;Step 511: judging whether the CELL_CSG frequency point is the same frequency point of the CELL_1;
这里,所述CELL_CSG频点为所述CELL_1的同频频点。Here, the CELL_CSG frequency point is the same-frequency frequency point of the CELL_1.
步骤512:判断所述CELL_CSG的信号质量是否高于所述CELL_1的信号质量;Step 512: Determine whether the signal quality of the CELL_CSG is higher than the signal quality of the CELL_1;
这里,随着UE从CELL_1的覆盖范围到CELL_CSG的覆盖范围的移动,所述CELL_CSG的信号质量越来越好,最终会高于所述CELL_1的信号质量,当所述CELL_CSG的信号质量高于所述CELL_1的信号质量时,可发起向CELL_CSG的小区重选。Here, as the UE moves from the coverage of CELL_1 to the coverage of CELL_CSG, the signal quality of the CELL_CSG is getting better and better, and will eventually be higher than the signal quality of the CELL_1. When the signal quality of the CELL_CSG is higher than the When the signal quality of CELL_1 is above mentioned, cell reselection to CELL_CSG can be initiated.
步骤513:UE选择所述CELL_CSG为驻留小区。Step 513: UE selects the CELL_CSG as the cell to camp on.
图6为本发明实施例CSG小区重选的装置组成结构示意图,如图6所示,本发明实施例CSG小区重选的装置组成包括:匹配模块61及测量模块62;其中,FIG. 6 is a schematic diagram of the structure of a device for CSG cell reselection in an embodiment of the present invention. As shown in FIG. 6 , the composition of a device for CSG cell reselection in an embodiment of the present invention includes: a matching module 61 and a measurement module 62; wherein,
所述匹配模块61,用于将UE驻留的宏小区的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,并在匹配成功时,触发测量模块62;The matching module 61 is configured to match the CGI information of the macro cell where the UE resides with the neighbor cell CGI list in the CSG cell information where the UE has historically resided, and trigger the measurement module 62 when the matching is successful;
所述测量模块62,用于对匹配成功的邻区CGI列表对应的CSG小区频点进行测量,确定测量得到的物理小区ID在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内时,对所述物理小区进行测量评估,并在确定所述物理小区符合测量评估条件时,选择所述物理小区为驻留小区。The measurement module 62 is configured to measure the frequency point of the CSG cell corresponding to the successfully matched neighboring cell CGI list, and determine when the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided , performing measurement evaluation on the physical cell, and selecting the physical cell as a camping cell when it is determined that the physical cell meets the measurement evaluation condition.
进一步的,所述装置还包括:获取模块63,用于当UE驻留CSG小区时,获取所述CSG小区的相关信息,并保存所述CSG小区的相关信息至UE历史驻留的CSG小区信息中,同时将所述CSG小区的相关信息写入非易失性存储器,如此,关机后上述CSG的相关信息不会丢失,下次开机后仍可读取使用;其中,所述CSG小区的相关信息包括:CSG小区频点、CSG ID、PLMNID、CSG物理小区ID范围及CSG小区的邻区CGI列表;Further, the device further includes: an obtaining module 63, configured to obtain relevant information of the CSG cell when the UE camps on the CSG cell, and save the relevant information of the CSG cell to the information of the CSG cell where the UE has historically camped At the same time, the relevant information of the CSG cell is written into the non-volatile memory, so that the above-mentioned CSG-related information will not be lost after the shutdown, and can still be read and used after the next startup; wherein, the relevant information of the CSG cell Information includes: CSG cell frequency point, CSG ID, PLMNID, CSG physical cell ID range and CSG cell neighbor CGI list;
相应的,所述UE历史驻留的CSG小区信息包括:所述装置历史驻留的CSG小区频点、CSG ID、CSG小区的PLMNID、CSG物理小区ID范围及CSG小区的邻区CGI列表;Correspondingly, the CSG cell information where the UE has historically camped includes: the CSG cell frequency point, CSG ID, CSG cell PLMNID, CSG physical cell ID range, and CSG cell neighbor CGI list of the CSG cell where the device has historically camped;
所述获取模块63获取所述CSG物理小区ID范围及所述CSG小区的邻区CGI列表包括:The acquiring module 63 acquiring the CSG physical cell ID range and the CSG cell neighbor CGI list includes:
所述获取模块63提取SIB4中的CSG物理小区ID范围及所述CSG小区的同频邻区CGI列表,并提取SIB5中所述CSG小区的异频邻区CGI列表,所述CSG小区的同频邻区CGI列表及所述CSG小区的异频邻区CGI列表共同组成所述CSG小区的邻区CGI列表,所述CSG小区的邻区CGI列表最多可保存N个所述CSG小区的邻区CGI信息,N为正整数,N值可根据实际情况设定;The acquisition module 63 extracts the CSG physical cell ID range in SIB4 and the CGI list of the same-frequency adjacent cells of the CSG cell, and extracts the CGI list of the different-frequency adjacent cells of the CSG cell in SIB5, and the CGI list of the same-frequency adjacent cells of the CSG cell. The neighbor CGI list and the inter-frequency neighbor CGI list of the CSG cell together form the neighbor CGI list of the CSG cell, and the CSG neighbor CGI list can store up to N neighbor CGIs of the CSG cell Information, N is a positive integer, and the value of N can be set according to the actual situation;
其中,所述CSG小区的邻区CGI列表中包括的CGI信息包括:小区PLMN ID及CELLID;这里,所述CELL ID为通过在SIB4及SIB5中增加cellIdentity信元而增加的所述CSG小区的邻区身份标识信息;所述cellIdentity信元仅对CSG小区为必选项,如此,不影响现有普通宏小区的系统信息SIB4的配置,在部署CSG小区时,增加CSG小区的同频邻区CGI信息至SIB4中的同频邻区列表,增加CSG小区的异频邻区CGI信息至SIB5中的异频邻区列表;增加所述小区身份标识信元后的SIB4的同频邻区列表结构及SIB5的异频邻区列表结构中均包括:physCellId信元、q-OffsetCell信元及cellIdentity信元。Wherein, the CGI information included in the neighbor cell CGI list of the CSG cell includes: cell PLMN ID and CELLID; here, the cell ID is the neighbor of the CSG cell added by adding the cellIdentity information element in SIB4 and SIB5 Area identity information; the cellIdentity information element is only mandatory for CSG cells, so that it does not affect the configuration of the system information SIB4 of the existing common macro cells, and when deploying CSG cells, increase the CGI information of the same frequency adjacent cells of CSG cells To the same-frequency neighbor list in SIB4, add the different-frequency neighbor CGI information of the CSG cell to the different-frequency neighbor list in SIB5; add the same-frequency neighbor list structure of SIB4 and SIB5 after adding the cell identity information element The structure of the inter-frequency neighboring cell list includes: physCellId information element, q-OffsetCell information element and cellIdentity information element.
进一步的,所述匹配模块61将UE驻留的宏小区的CGI信息与UE历史驻留的CSG小区信息中的邻区CGI列表进行匹配,如果匹配成功,表明匹配成功的邻区CGI列表中存有所述宏小区的CGI信息,也就可以表明,此宏小区为匹配成功的邻区CGI列表对应的CSG小区的邻区。Further, the matching module 61 matches the CGI information of the macro cell where the UE resides with the neighboring cell CGI list in the CSG cell information where the UE has historically camped, and if the matching is successful, it indicates that there are With the CGI information of the macro cell, it can be indicated that the macro cell is a neighboring cell of the CSG cell corresponding to the successfully matched neighboring cell CGI list.
进一步的,所述测量模块62确定测量得到的物理小区ID在UE历史驻留的CSG小区信息中的CSG物理小区ID范围内时,表明此物理小区为CSG小区,可开启对所述物理小区的测量评估;Further, when the measurement module 62 determines that the measured physical cell ID is within the range of the CSG physical cell ID in the CSG cell information where the UE has historically resided, it indicates that the physical cell is a CSG cell, and the physical cell ID can be enabled for the physical cell. measurement evaluation;
所述测量评估条件为:所述物理小区频点为所述宏小区的异频频点,或者所述物理小区频点为所述宏小区的同频频点,且所述物理小区的信号质量高于所述宏小区的信号质量。The measurement evaluation condition is: the frequency point of the physical cell is a different frequency point of the macro cell, or the frequency point of the physical cell is the same frequency point of the macro cell, and the signal quality of the physical cell is higher than The signal quality of the macro cell.
上面所述匹配模块61、测量模块62及获取模块63均可由服务器中的中央处理器(CPU,Central Processing Unit)、或数字信号处理器(DSP,Digital Signal Processor)、或现场可编程门阵列(FPGA,Field Programmable Gate Array)实现。Above-mentioned matching module 61, measurement module 62 and acquisition module 63 all can be by central processing unit (CPU, Central Processing Unit) in the server, or digital signal processor (DSP, Digital Signal Processor), or Field Programmable Gate Array ( FPGA, Field Programmable Gate Array) implementation.
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。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.
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