WO2011134383A1 - Procédé et dispositif de configuration de cellules voisines gsm dans une cellule td-scdma - Google Patents

Procédé et dispositif de configuration de cellules voisines gsm dans une cellule td-scdma Download PDF

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Publication number
WO2011134383A1
WO2011134383A1 PCT/CN2011/073292 CN2011073292W WO2011134383A1 WO 2011134383 A1 WO2011134383 A1 WO 2011134383A1 CN 2011073292 W CN2011073292 W CN 2011073292W WO 2011134383 A1 WO2011134383 A1 WO 2011134383A1
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Prior art keywords
cell
gsm
scdma
serving cell
neighboring
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PCT/CN2011/073292
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English (en)
Chinese (zh)
Inventor
谭凤鸣
朱向前
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电信科学技术研究院
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Publication of WO2011134383A1 publication Critical patent/WO2011134383A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a Global System for Mobile Communication (GSM) neighbor configuration of a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) cell.
  • GSM Global System for Mobile Communication
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • GSM Global System for Mobile communications
  • 2G second generation mobile communication system
  • TD-SCDMA is a third-generation mobile communication system (3G). Compared with 2G systems, it can provide higher service transmission rates and provide users with more abundant services. At present, the system has reached commercial level and is widely used.
  • the TD-SCDMA network and the GSM network coexist when the TD-SCDMA network is built. In this case, it can combine the advantages of high service rate and rich service of TD-SCDMA network and wide coverage of GSM network to provide users with better mobile communication services.
  • This requires network devices and terminals to support switching between TD-SCDMA and GSM cells. Terminals that can meet this requirement are called TD-SCDMA/GSM Dual Mode terminals.
  • the GSM neighboring cells of each TD-SCDMA cell are configured according to the TD-SCDMA cell information and the GSM cell information, according to the network planning of the TD-SCDMA network itself, and GSM. Planning information to obtain TD-SCDMA small
  • the area information and the GSM cell information such as the location information of the acquired cell, some wireless parameters of the cell, such as frequency parameter and coverage parameter of the cell.
  • the GSM neighboring cell is configured for each TD-SCDMA cell according to the TD-SCDMA cell information and the GSM cell information, since the radio configurations of the cells in different locations are different, the GSM neighboring cells of each TD-SCDMA cell need to be separately performed. The data is input and the configuration is complicated.
  • GSM neighbor information changes such as modifying the frequency information of the GSM cell due to capacity expansion, etc.
  • the GSM neighbor configuration of the TD-SCDMA cell is updated.
  • the method for obtaining the GSM cell information change by the TD-SCDMA network is realized by irregular manual road test, and the discovery is not timely, and the manual road test is also time consuming.
  • the TD-SCDMA serving cell sends the GSM neighboring cell configuration to the UE.
  • the UE accesses the TD-SCDMA network, it may be in the process of continuous movement.
  • the network side may determine that the coverage strength of the location of the UE does not meet the requirements according to the measurement report reported by the UE.
  • the UE determines, according to the GSM neighboring cell configuration, that the TD-SCDMA serving cell is not configured with the GSM neighboring cell, the reason is that the radio link fails (RLF) Cell update procedure; when the UE determines that the TD-SCDMA serving cell is configured with the GSM neighboring cell according to the GSM neighboring cell configuration, the radio frequency is switched from the TD-SCDMA frequency point to the GSM frequency point according to the configured GSM neighboring cell information.
  • RLF radio link fails
  • the network side indicates, according to the measurement information, whether the UE switches to the GSM neighboring cell; when the network side indicates that the UE switches to the GSM neighboring cell, the UE receives the current TD-SCDMA service.
  • the cell switches to the GSM neighboring cell; when the network side indicates that the UE does not switch to the GSM neighboring cell, the UE performs a Cell Update procedure of the RLF.
  • the GSM neighboring cell configured by the TD-SCDMA serving cell does not match the actual GSM cell information, or the GSM neighboring cell configuration configured by the TD-SCDMA serving cell is no longer satisfied, or there is a change in the GSM cell information.
  • the new GSM cell can be added as a GSM neighbor of the TD-SCDMA serving cell, affecting TD-SCDMA and GSM networks. Interoperability.
  • the UE still performs the cell update process due to the RLF, and the cell update process may succeed or fail in the environment with poor TD-SCDMA coverage. In the event of a failure, the UE will be dropped and affect the user's use. Summary of the invention
  • the embodiments of the present invention provide a GSM neighboring cell configuration method and device for a TD-SCDMA cell, which automatically adds a GSM neighboring cell to a TD-SCDMA cell, and optimizes the TD-SCDMA network quality.
  • An embodiment of the present invention provides a GSM neighboring cell configuration method for a TD-SCDMA cell, including: acquiring a pilot strength value of a TD-SCDMA serving cell of a UE that has a radio link failure RLF;
  • the re-determined GSM neighboring cell is configured to the TD-SCDMA serving cell.
  • the embodiment of the present invention further provides a GSM neighboring cell configuration device for a TD-SCDMA cell, including: a pilot strength value acquiring unit, configured to acquire a pilot strength value of a TD-SCDMA serving cell of a UE that has a radio link failure RLF ;
  • a neighboring area missing adding determining unit configured to obtain the latest TD-SCDMA cell information and GSM when the TD-SCDMA serving cell misses the GSM neighboring cell according to the comparison between the pilot strength value and the set threshold value.
  • a neighboring area redetermining unit configured to redetermine a GSM neighboring cell of the TD-SCDMA serving cell according to the latest TD-SCDMA cell information and GSM cell information;
  • a neighboring cell adding unit configured to allocate the redefined GSM neighboring cell to the TD-SCDMA serving cell.
  • a radio network controller including the TD-SCDMA cell GSM neighboring zone configuration equipment.
  • the GSM neighboring cell configuration method and device for the TD-SCDMA cell provided by the present invention have the following beneficial effects:
  • the network side can automatically discover the GSM area mismatch problem of the TD-SCDMA cell, and perform self-optimization by adding the GSM neighboring cell. Function to optimize the quality of TD-SCDMA network. DRAWINGS
  • FIG. 1 is a flowchart of a GSM neighboring cell configuration method for a TD-SCDMA cell according to an embodiment of the present invention
  • FIG. 2 is a structural diagram of a GSM neighboring cell configuration device of a TD-SCDMA cell according to an embodiment of the present invention. detailed description
  • An embodiment of the present invention provides a GSM neighboring cell configuration method for a TD-SCDMA cell. As shown in FIG. 1, the method includes:
  • Step S101 Obtain a pilot strength value of a TD-SCDMA serving cell of the UE in which the RLF occurs.
  • the TD-SCDMA serving cell sends the GSM neighboring cell configuration to the TD-SCDMA serving cell.
  • UE accesses the TD-SCDMA network, it may be in the process of continuous movement.
  • the TD-SCDMA network coverage pilot is less than -90 dBm, and the network side reports it according to the UE.
  • the measurement report may determine that the coverage strength of the location where the UE is located does not meet the requirement, and send a signaling message to the UE to notify the UE; after receiving the signaling message, the UE determines, according to the GSM neighboring cell configuration, that the TD-SCDMA serving cell is not configured with the GSM neighboring cell.
  • the cell update process is performed by the RLF.
  • the UE determines that the TD-SCDMA serving cell is configured with the GSM neighboring cell according to the GSM neighboring cell configuration, and switches the radio frequency from the TD-SCDMA frequency point to the GSM frequency according to the configured GSM neighboring cell information.
  • the specific measurement includes the pilot strength, that is, the GSM carrier received signal strength indicator (RSI), etc., and the measurement information is reported to the network side; the network side indicates according to the measurement information.
  • the network side indicates the UE to the GSM neighboring cell at the network side
  • the UE switches from the current TD-SCDMA serving cell to the GSM neighboring cell; when the network side indicates that the UE does not switch to the GSM neighboring cell, the UE performs a Cell Update procedure of the RLF.
  • the UE when the UE is in a relatively poor coverage environment, when the GSM neighboring cell is not configured, or the GSM neighboring cell is not satisfied by the GSM neighboring cell measurement, the UE generates an RLF, thereby triggering the cell update process.
  • Step S102 Determine, according to the comparison between the pilot strength value and the set threshold, that the TD-SCDMA serving cell misses the GSM neighboring cell, and obtain the latest TD-SCDMA cell information and the GSM cell information.
  • the pilot signal is that the cell base station continuously transmits the unmodulated direct sequence spread spectrum signal, which enables the UE to obtain the forward code division multiple access channel time limit, provides the relevant demodulation phase reference, and provides signal strength comparison for each base station, and the UE can Determining when to switch, the pilot strength value of the TD-SCDMA serving cell represents the coverage strength of the TD-SCDMA serving cell.
  • the pilot strength value is compared with the set threshold 0P + , where P represents an absolute intensity value, indicating one If the value is less than this threshold, it is considered that the current location of the UE is poorly covered by TD-SCDMA, and it is judged that the UE should handover to a certain GSM cell, and because the TD-SCDMA serving cell misses the GSM neighboring cell, that is, the current There is no GSM neighboring cell that can be handed over without switching, causing the UE to trigger RLF in the TD-SCDMA network and trigger the Cell Update process.
  • the pilot strength value of the TD-SCDMA serving cell is not less than the above-mentioned set threshold, it is determined that the GSM neighboring cell is not missed for the TD-SCDMA serving cell, but the RLF occurs for other reasons.
  • the latest TD-SCDMA cell information and the GSM cell information are obtained by importing the latest planning information table of the TD-SCDMA cell and the GSM network cell, for example, The latest planning information table of the TD-SCDMA cell and the GSM network cell can be imported from the Radio Network Controller (RNC).
  • RNC Radio Network Controller
  • the GSM neighboring cell of the TD-SCDMA serving cell may be determined according to some existing principles for determining the GSM neighboring cell of the TD-SCDMA cell.
  • Step S104 The re-determined GSM neighboring cell is configured to the TD-SCDMA serving cell, and specifically, the information of the GSM neighboring cell is added to the neighboring cell list of the TD-SCDMA serving cell, and the neighboring cell list may be saved in the RNC. in.
  • the TD-SCDMA serving cell sends the GSM neighboring cell configuration to the UE in the process of the UE starting to access the TD-SCDMA network.
  • the UE accesses the TD-SCDMA network
  • handover to the newly configured GSM neighboring cell can be implemented. Since the latest GSM cell configuration conforms to the actual situation, the UE can be successfully implemented.
  • Switch to the GSM neighbor The invention can automatically discover the GSM neighboring area missing allocation problem of the TD-SCDMA cell on the network side, and automatically add the GSM neighboring area to realize the self-optimization function, optimize the TD-SCDMA network quality, and improve the mutual TD-SCDMA network and GSM. Operational.
  • the UE can only obtain some UEs through the Cell Update message sent by the UE to the UMTS Terrestrial Radio Access Network (UTRAN).
  • Information (such as the cell identification (ID) of the access, the pilot information of the cell, the identity of the UE, the reason for the cell update, etc.).
  • ID the cell identification
  • the TD-SCDMA serving cell of the UE in which the RLF occurs is obtained in step S101.
  • the frequency intensity value can be used in any of the following three ways:
  • the 6A event report is that the transmit power of the UE is higher than the set threshold.
  • the reported measurement report that is, the measurement report of the 6A carrying pilot measurement value information specified in the standard
  • the 5A event report is the measurement report reported when the block error ratio (BLER) of the UE transmission data is greater than the set value.
  • BLER block error ratio
  • Both types of measurement reports report the pilot strength values of the serving cell and all neighboring cells in which the UE is located before the cell update. Therefore, the pilot strength values of the TD-SCDMA serving cell of the UE in which the RLF occurs can be obtained from the two types of measurement reports.
  • the pilot strength value may be a pilot strength value of a TD-SCDMA serving cell that causes the UE to generate RLF, or may be a pilot strength value of a TD-SCDMA serving cell currently being communicated after the UE completes the cell update, but may be Borrowing the pilot value as the pilot strength value of the TD-SCDMA serving cell of the UE in which the RLF occurs, performing the following steps;
  • the pilot strength report value of the TD-SCDMA serving cell is obtained according to the measurement report reported by the UE after the cell update is successful, after the cell receives the measurement control information.
  • the measurement control message may be re-received in the new cell (only in the TD-SCDMA network).
  • a commonly used 1G/2A event refers to the pilot strength of the current serving cell. If the pilot strength of the neighboring area is different to some extent and is maintained for a period of time, the UE sends a measurement report to the UTRAN. At this time, the pilot strength value of the surrounding cell of the UE can also be known, and the TD-SCDMA service of the UE that generates the RLF can be obtained. The cell is included in the surrounding cell, so the pilot strength value of the TD-SCDMA serving cell of the UE in which the RLF occurs can be obtained.
  • the TD-SCDMA serving cell ID (ID) of the UE in which the RLF is generated by the user is obtained by using the Cell Update message context sent by the cell in the cell update process in this embodiment.
  • the location information obtains the location information of the UE.
  • step S103 when the GSM neighboring cell of the TD-SCDMA serving cell is re-determined, the location of the UE and the location of the TD-SCDMA serving cell where the RLF is generated by the UE may be determined according to the obtained TD-SCDMA serving cell ID and the location information of the UE. And the surrounding GSM cell, and record the ID of the TD-SCDMA cell with the GSM neighboring area missing.
  • the TD-SCDMA serving cell misses the GSM neighboring cell, and specifically includes: Determining that the pilot strength value is less than a set threshold, and determining that the RLF is generated by the UE within a set period of time and the pilot strength value is less than the set threshold value reaches a set number of times, determining that the TD-SCDMA service is The cell misses the GSM neighbor. That is, according to the cumulative judgment result of a period of time, in a certain period of time, when a certain number of times occurs in a certain cell, it is determined that the TD-SCDMA serving cell misses the GSM neighboring cell and needs to re-determine the GSM neighboring cell.
  • the GSM neighboring cell of the TD-SCDMA serving cell may be re-determined by using the following criteria:
  • the TD-SCDMA serving cell and the GSM cell are co-sited and the antenna orientation is the same; therefore, the TD-SCDMA serving cell co-site (ie, the cell base station site) can be determined according to the latest TD-SCDMA and GSM cell information. The same) and the antennas face the same GSM cell, which is the GSM neighbor of the TD-SCDMA serving cell.
  • the TD-SCDMA serving cell and the GSM cell are non-co-sites and the antenna orientation is opposite; therefore, the non-co-site and the antenna of the TD-SCDMA monthly service cell can be determined according to the latest TD-SCDMA and GSM cell information. Facing the opposite GSM cell, it is the GSM neighboring cell of the TD-SCDMA serving cell.
  • the GSM cell is in the TD-SCDMA serving cell setting area
  • the GSM cell in the set area around the TD-SCDMA serving cell is determined, for example, it is determined that the nearest TD-SCDMA serving cell is within the circle of the set radius.
  • 6 GSM cells are the GSM neighboring cells of the TD-SCDMA serving cell.
  • any one of the above three principles it can be determined as the GSM neighboring cell of the TD-SCDMA serving cell. It is also possible to use any combination of the above three principles to determine the GSM neighbor of the TD-SCDMA serving cell.
  • the priority of each principle may be set, and the GSM neighboring cell of the TD-SCDMA serving cell is determined according to the priority order.
  • the TD-SCDMA serving cell and the TD-SCDMA serving cell are used. The principle that the GSM cell co-sites and the antennas are oriented the same is set to the highest priority.
  • the method further includes: Step S105: When determining that there are GSM neighboring cells with the same frequency or neighboring among the multiple GSM neighboring cells, select the GSM neighboring cells with the same frequency or adjacent frequencies. The reserved GSM neighboring cells should try to avoid the same frequency or neighboring. The screening can be based on the priority of the above principles. When the same priority is used, the distance can be selected according to the distance from the TD-SCDMA serving cell.
  • step S105 may also be performed between step S103 and step S104, that is, firstly, the GSM neighboring cell that is re-determined and not filtered out is allocated to the TD-SCDMA serving cell.
  • a GSM neighboring cell configuration device of a TD-SCDMA cell is further provided. As shown in FIG. 2, the device includes:
  • a pilot strength value obtaining unit 201 configured to acquire a pilot strength value of a TD-SCDMA serving cell of the UE in which the RLF occurs
  • a neighboring area leakage adding determining unit 202 configured to use the pilot strength value and the set threshold value according to the pilot strength value Comparing, determining that the TD-SCDMA serving cell misses the GSM neighboring cell, acquiring the latest TD-SCDMA cell information and GSM cell information; the neighboring cell redetermining unit 203, configured to use the latest TD-SCDMA cell information And the GSM cell information, the GSM neighboring cell of the TD-SCDMA serving cell is re-determined; the neighboring cell adding unit 204 is configured to configure the re-determined GSM neighboring cell to the TD-SCDMA serving cell.
  • the pilot strength value obtaining unit 201 is configured to acquire a pilot strength value of the TD-SCDMA serving cell according to a 6A event report and/or a 5A event report reported by the UE that generates the RLF before the cell update.
  • the 6A event report is a measurement report of the carried pilot measurement value information reported when the transmit power of the UE is higher than the set threshold
  • the 5A event report is the carried report when the block error rate BLER of the UE transmission data is greater than the set value.
  • Measurement report of pilot measurement information is configured to acquire a pilot strength value of the TD-SCDMA serving cell according to a cell update message reported by the UE in which the RLF is generated in the cell update process.
  • the pilot strength value obtaining unit 201 is specifically configured to acquire, according to the measurement report reported by the UE after the cell update is successful, after the cell update is successful, the measurement report reported by the new cell is obtained, and the TD-SCDMA serving cell is obtained. Frequency strength value.
  • the neighboring area addition determining unit 202 in the device is specifically used for the pilot strength value When the threshold is smaller than the set threshold, it is determined that the TD-SCDMA serving cell leaks the GSM neighboring cell. Further, the neighboring area leakage adding determining unit 202 is configured to: when the pilot strength value is less than a set threshold, and determine that the UE generates RLF in the set time period, and the pilot strength value is less than When the number of times the threshold value reaches the set number of times, it is determined that the TD-SCDMA serving cell leaks the GSM neighboring cell.
  • the neighboring cell re-determining unit 203 is specifically configured to determine the TD-SCDMA monthly good service cell according to the latest TD-SCDMA and GSM cell information.
  • the common site and the antenna face the same GSM cell, which is the GSM neighbor of the TD-SCDMA serving cell.
  • the neighboring area re-determining unit 203 is specifically configured to determine, according to the latest TD-SCDMA and GSM cell information, a GSM cell that is non-co-located with the TD-SCDMA serving cell and has an antenna orientation, and is the TD - The GSM neighbor of the SCDMA serving cell.
  • the neighboring cell re-determining unit is configured to determine, according to the latest TD-SCDMA and GSM cell information, a GSM cell in a set area around the TD-SCDMA serving cell, where the TD-SCDMA is The GSM neighbor of the serving cell.
  • the neighbor re-determination unit 203 may also use any combination of the above three principles to determine the GSM neighbor of the TD-SCDMA serving cell.
  • the priority of each principle can be set, and the GSM neighboring cell of the TD-SCDMA serving cell is determined according to the priority order.
  • the TD-SCDMA serving cell and the TD-SCDMA serving cell are used.
  • the principle that the GSM cell co-sites and the antennas are oriented the same is set to the highest priority.
  • the device further includes: a neighboring cell screening unit 205, configured to have multiple in the redefined GSM neighboring cell, and determine multiple GSM neighboring cells. When there are GSM neighbors with the same frequency or adjacent frequency, the GSM neighbors with the same frequency or adjacent frequencies are filtered.
  • the GSM neighboring cell configuration device of the TD-SCDMA serving cell may be specifically an RNC.
  • the invention can automatically discover the GSM neighboring area missing allocation problem in the TD-SCDMA network, and perform self-optimization function, which can reduce the operation and maintenance cost of the network and optimize the quality of the TD-SCDMA network.
  • the present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention.
  • the flow chart can be implemented by computer program instructions And/or a combination of the processes and/or blocks in the block diagrams, and the flowcharts and/or blocks in the flowcharts and/or block diagrams.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif de configuration de cellules voisines pour le système mondial de communications mobiles (Global System for Mobile communications, GSM) dans une cellule en accès multiple par répartition des codes à synchronisation par répartition dans le temps (Time Division-Synchronization Code Division Multiple Access, TD-SCDMA), celles-ci étant utilisées pour résoudre le problème de la configuration par omission des cellules GSM voisines de la cellule TD-SCDMA. Le procédé comprend les étapes consistant à : acquérir une valeur d'intensité de pilote de la cellule TD-SCDMA en service dans laquelle un UE subit une défaillance de liaison radio (Radio Link Failure, RLF); acquérir les informations les plus récentes de la cellule TD-SCDMA et des cellules GSM lorsqu'il est confirmé que les cellules GSM voisines sont configurées par omission pour la cellule TD-SCDMA en service en fonction de la comparaison de la valeur d'intensité de pilote avec une valeur seuil spécifiée; re-déterminer les cellules GSM voisines de la cellule TD-SCDMA en service en fonction des informations les plus récentes de la cellule TD-SCDMA et des cellules GSM; et configurer les cellules GSM voisines re-déterminées pour la cellule TD-SCDMA en service. Le problème de la configuration par omission des cellules GSM voisines dans la cellule TD-SCDMA est donc découvert automatiquement.
PCT/CN2011/073292 2010-04-29 2011-04-26 Procédé et dispositif de configuration de cellules voisines gsm dans une cellule td-scdma WO2011134383A1 (fr)

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CN2010101629648A CN102083108B (zh) 2010-04-29 2010-04-29 一种td-scdma小区的gsm邻区添加方法及设备

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CN105554769B (zh) * 2011-06-07 2019-07-19 华为技术有限公司 邻区优化的方法和基站
CN104427533B (zh) * 2013-09-04 2019-04-26 中国移动通信集团广东有限公司 一种邻区优化方法及装置
CN105764065A (zh) * 2014-12-15 2016-07-13 深圳市中兴微电子技术有限公司 一种应用小区连接建立失败报告的方法及设备
CN106332117A (zh) * 2015-06-23 2017-01-11 中兴通讯股份有限公司 一种基于rlf数据的lte网络优化方法及装置
CN108029026B (zh) * 2015-09-28 2021-09-07 英国电讯有限公司 蜂窝通信网络中的方法和装置、存储介质和蜂窝通信网络

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CN101111060A (zh) * 2006-07-18 2008-01-23 中兴通讯股份有限公司 一种无线网络环境中的邻区配置优化的方法

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CN101111060A (zh) * 2006-07-18 2008-01-23 中兴通讯股份有限公司 一种无线网络环境中的邻区配置优化的方法
CN1949909A (zh) * 2006-10-31 2007-04-18 华为技术有限公司 一种检测遗漏配置的邻近小区的方法及系统

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