CN107371197B - A handover method and base station - Google Patents

A handover method and base station Download PDF

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CN107371197B
CN107371197B CN201610312290.2A CN201610312290A CN107371197B CN 107371197 B CN107371197 B CN 107371197B CN 201610312290 A CN201610312290 A CN 201610312290A CN 107371197 B CN107371197 B CN 107371197B
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base station
handover
terminal
frequency point
switching
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CN107371197A (en
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翁玮文
王苗
曹蕾
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China Mobile Communications Group Co Ltd
Research Institute of China Mobile Communication Co Ltd
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China Mobile Communications Corp
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0072Transmission or use of information for re-establishing the radio link of resource information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0077Transmission or use of information for re-establishing the radio link of access information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point

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Abstract

本发明实施例公开了一种切换方法和基站。所述方法包括:源基站向目标基站发送携带有特定信息的切换请求消息;所述特定信息用于目标基站选择频点供终端接入;接收所述目标基站的切换请求响应消息;所述切换请求响应消息包括切换频点信息;向终端发送切换命令;所述切换命令包括切换频点信息。

Figure 201610312290

The embodiments of the present invention disclose a handover method and a base station. The method includes: a source base station sending a handover request message carrying specific information to a target base station; the specific information is used by the target base station to select a frequency point for terminal access; receiving a handover request response message of the target base station; the handover The request response message includes handover frequency information; a handover command is sent to the terminal; the handover command includes handover frequency information.

Figure 201610312290

Description

一种切换方法和基站A handover method and base station

技术领域technical field

本发明涉及无线通信技术,具体涉及一种切换方法和基站。The present invention relates to wireless communication technology, in particular to a handover method and a base station.

背景技术Background technique

当前第三代合作伙伴计划(3GPP,3rd Generation Partnership Project)标准定义的不同频带类别彼此存在交叠,如BAND38(TD-LTE,2570~2620MHz)、BAND41(TD-LTE,2496-2690MHz)和BAND7(LTE-FDD上行:2500-2570MHz,下行:2620-2690MHz),可以看到,BAND41包含了BAND38和BAND7。若运营商同时获得了BAND38和BAND41频段,且网络设备以BAND38为主频段,BAND41为辅频段。在这种情况下,具备重叠频段能力(譬如B38/B41)且支持多频段指示增强的终端在不同类型基站间X2接口切换,例如从支持重叠频段能力(譬如B38/B41)且支持多频段指示增强的基站向支持重叠频段能力(譬如B38/B41)但不支持多频段指示增强的基站间切换就会存在问题,导致切换失败。Different frequency band categories defined by the current 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) standards overlap each other, such as BAND38 (TD-LTE, 2570-2620MHz), BAND41 (TD-LTE, 2496-2690MHz) and BAND7 (LTE-FDD uplink: 2500-2570MHz, downlink: 2620-2690MHz), it can be seen that BAND41 includes BAND38 and BAND7. If the operator has obtained both BAND38 and BAND41 frequency bands, and the network equipment uses BAND38 as the main frequency band and BAND41 as the auxiliary frequency band. In this case, a terminal with overlapping frequency band capability (such as B38/B41) and support for multi-band indication enhancement switches over the X2 interface between different types of base stations, for example, from supporting overlapping frequency band capability (such as B38/B41) and supporting multi-band indication There is a problem in the handover between the enhanced base station to the base station that supports overlapping frequency band capability (such as B38/B41) but does not support multi-band indication enhancement, resulting in handover failure.

发明内容SUMMARY OF THE INVENTION

为解决现有存在的技术问题,本发明实施例提供一种切换方法和基站,能够解决重叠频段的切换失败的问题。In order to solve the existing technical problems, the embodiments of the present invention provide a handover method and a base station, which can solve the problem of handover failure of overlapping frequency bands.

为达到上述目的,本发明实施例的技术方案是这样实现的:In order to achieve the above-mentioned purpose, the technical scheme of the embodiment of the present invention is realized as follows:

本发明实施例提供了一种切换方法,所述方法包括:An embodiment of the present invention provides a handover method, and the method includes:

源基站向目标基站发送携带有特定信息的切换请求消息;所述特定信息用于目标基站选择频点供终端接入;The source base station sends a handover request message carrying specific information to the target base station; the specific information is used by the target base station to select a frequency point for the terminal to access;

接收所述目标基站的切换请求响应消息;所述切换请求响应消息包括切换频点信息;receiving a handover request response message from the target base station; the handover request response message includes handover frequency point information;

向终端发送切换命令;所述切换命令包括切换频点信息。Send a handover command to the terminal; the handover command includes handover frequency information.

上述方案中,所述源基站向目标基站发送携带有特定信息的切换请求消息之前,所述方法还包括:所述源基站对目标基站的能力、终端能力以及目标切换频点进行分析,基于分析结果判定在切换请求消息中是否增加特定信息。In the above solution, before the source base station sends a handover request message carrying specific information to the target base station, the method further includes: the source base station analyzes the capability of the target base station, the terminal capability and the target handover frequency, and based on the analysis As a result, it is determined whether or not specific information is added to the handover request message.

上述方案中,所述对目标基站的能力、终端能力以及目标切换频点进行分析,基于分析结果判定在切换请求消息中是否增加特定信息,包括:In the above solution, the capability of the target base station, the capability of the terminal, and the target handover frequency are analyzed, and based on the analysis result, it is determined whether to add specific information to the handover request message, including:

当所述目标基站支持重叠频段、且所述终端支持重叠频段、且所述目标切换频点为重叠频段时,判定在切换请求消息中增加特定信息。When the target base station supports overlapping frequency bands, the terminal supports overlapping frequency bands, and the target handover frequency is an overlapping frequency band, it is determined to add specific information to the handover request message.

上述方案中,所述对目标基站的能力、终端能力以及目标切换频点进行分析,基于分析结果判定在切换请求消息中是否增加特定信息,包括:In the above solution, the capability of the target base station, the capability of the terminal, and the target handover frequency are analyzed, and based on the analysis result, it is determined whether to add specific information to the handover request message, including:

当所述目标基站不支持重叠频段、或所述终端不支持重叠频段、或所述目标切换频点不是重叠频段时,判定在切换请求消息中不增加所述特定信息。When the target base station does not support overlapping frequency bands, or the terminal does not support overlapping frequency bands, or the target handover frequency is not an overlapping frequency band, it is determined that the specific information is not added to the handover request message.

上述方案中,所述特定信息包括:源基站加密秘钥、终端驻留频点和网络色码(NCC)。In the above solution, the specific information includes: source base station encryption key, terminal resident frequency and network color code (NCC).

本发明实施例还提供了一种切换方法,所述方法包括:The embodiment of the present invention also provides a handover method, the method includes:

目标基站接收源基站的切换请求消息;The target base station receives the handover request message from the source base station;

当所述切换请求消息中包括特定信息、并且所述目标基站支持重叠频段时,依据终端能力、所述特定消息中携带的终端驻留频点以及预设切换规则获得切换频点信息;When the handover request message includes specific information and the target base station supports overlapping frequency bands, obtain the handover frequency information according to the terminal capability, the terminal resident frequency carried in the specific message, and the preset handover rule;

所述目标基站向所述源基站发送携带有所述切换频点信息的切换请求响应消息。The target base station sends a handover request response message carrying the handover frequency point information to the source base station.

上述方案中,所述依据终端能力、所述特定消息中携带的终端驻留频点以及预设切换规则获得切换频点信息,包括:In the above solution, the handover frequency information obtained according to the terminal capability, the terminal resident frequency carried in the specific message, and the preset handover rule includes:

当预设切换规则表明终端驻留频点为第一优先级时,则所述目标基站选择所述终端驻留频点为切换频点;When the preset handover rule indicates that the terminal camping frequency point is the first priority, the target base station selects the terminal camping frequency point as the handover frequency point;

当预设切换规则表明重叠频段中最大的频段为第一优先级时,则所述目标基站选择所述最大的频段为切换频点;When the preset handover rule indicates that the largest frequency band in the overlapping frequency bands is the first priority, the target base station selects the largest frequency band as the handover frequency point;

当预设切换规则表明按照终端初始接入目标基站选择的频点作为切换频点时,则所述目标基站依据终端能力,选择所述终端初始接入的频点作为切换频点。When the preset handover rule indicates that the frequency selected by the terminal initially accesses the target base station as the handover frequency, the target base station selects the frequency initially accessed by the terminal as the handover frequency according to the terminal capability.

上述方案中,所述特定信息还包括:源基站加密秘钥和NCC;所述方法还包括:In the above solution, the specific information further includes: the source base station encryption key and NCC; the method further includes:

基于所述源基站加密秘钥、NCC和所述切换频点计算加密秘钥。The encryption key is calculated based on the source base station encryption key, the NCC and the handover frequency.

本发明实施例还提供了一种基站,所述基站为源基站;所述基站包括:第一发送单元和第一接收单元;其中,An embodiment of the present invention further provides a base station, where the base station is a source base station; the base station includes: a first sending unit and a first receiving unit; wherein,

所述第一发送单元,用于向目标基站发送携带有特定信息的切换请求消息;所述特定信息用于目标基站选择频点供终端接入;The first sending unit is configured to send a handover request message carrying specific information to the target base station; the specific information is used by the target base station to select a frequency point for the terminal to access;

所述第一接收单元,用于接收所述目标基站的切换请求响应消息;所述切换请求响应消息包括切换频点信息;The first receiving unit is configured to receive a handover request response message of the target base station; the handover request response message includes handover frequency point information;

所述第一发送单元,还用于向终端发送切换命令;所述切换命令包括切换频点信息。The first sending unit is further configured to send a handover command to the terminal; the handover command includes handover frequency point information.

上述方案中,所述基站还包括第一处理单元,用于所述第一发送单元向目标基站发送携带有特定信息的切换请求消息之前,对目标基站的能力、终端能力以及目标切换频点进行分析,基于分析结果判定在切换请求消息中是否增加特定信息。In the above solution, the base station further includes a first processing unit, which is used for performing the processing on the capability of the target base station, the terminal capability and the target switching frequency before the first sending unit sends the handover request message carrying the specific information to the target base station. Analyze, and determine whether to add specific information to the handover request message based on the analysis result.

上述方案中,所述第一处理单元,用于当所述目标基站支持重叠频段、且所述终端支持重叠频段、且所述目标切换频点为重叠频段时,判定在切换请求消息中增加特定信息。In the above solution, the first processing unit is configured to, when the target base station supports overlapping frequency bands, the terminal supports overlapping frequency bands, and the target handover frequency point is an overlapping frequency band, determine to add a specific frequency band in the handover request message. information.

上述方案中,所述第一处理单元,用于当所述目标基站不支持重叠频段、或所述终端不支持重叠频段、或所述目标切换频点不是重叠频段时,判定在切换请求消息中不增加所述特定信息。In the above solution, the first processing unit is configured to determine that in the handover request message when the target base station does not support overlapping frequency bands, or the terminal does not support overlapping frequency bands, or the target switching frequency point is not an overlapping frequency band The specific information is not added.

本发明实施例还提供了一种基站,所述基站为目标基站;所述基站包括:第二接收单元、第二处理单元和第二发送单元;其中,An embodiment of the present invention further provides a base station, where the base station is a target base station; the base station includes: a second receiving unit, a second processing unit, and a second sending unit; wherein,

所述第二接收单元,用于接收源基站的切换请求消息;the second receiving unit, configured to receive the handover request message of the source base station;

所述第二处理单元,用于当所述第二接收单元接收的所述切换请求消息中包括特定信息、并且所述目标基站支持重叠频段时,依据终端能力、所述特定消息中携带的终端驻留频点以及预设切换规则获得切换频点;The second processing unit is configured to, when the handover request message received by the second receiving unit includes specific information and the target base station supports overlapping frequency bands, according to the terminal capability, the terminal carried in the specific message Dwell frequency and preset switching rule to obtain switching frequency;

所述第二发送单元,用于向所述源基站发送携带有所述切换频点信息的切换请求响应消息。The second sending unit is configured to send a handover request response message carrying the handover frequency point information to the source base station.

上述方案中,所述第二处理单元,用于当预设切换规则表明终端驻留频点为第一优先级时,则选择所述终端驻留频点为切换频点;当预设切换规则表明重叠频段中最大的频段为第一优先级时,则选择所述最大的频段为切换频点;当预设切换规则表明按照终端初始接入目标基站选择的频点作为切换频点时,则依据终端能力,选择所述终端初始接入的频点作为切换频点。In the above solution, the second processing unit is configured to select the terminal resident frequency as the switching frequency when the preset switching rule indicates that the terminal resident frequency is the first priority; when the preset switching rule When it is indicated that the largest frequency band in the overlapping frequency bands is the first priority, the largest frequency band is selected as the handover frequency; when the preset handover rule indicates that the frequency selected according to the initial access target base station of the terminal is used as the handover frequency, then According to the terminal capability, the frequency point initially accessed by the terminal is selected as the handover frequency point.

上述方案中,所述特定信息还包括:源基站加密秘钥和NCC;In the above solution, the specific information further includes: source base station encryption key and NCC;

所述第二处理单元,还用于基于所述源基站加密秘钥、NCC和所述切换频点计算加密秘钥。The second processing unit is further configured to calculate the encryption key based on the source base station encryption key, the NCC and the handover frequency point.

本发明实施例提供的切换方法和基站,一方面,源基站向目标基站发送携带有特定信息的切换请求消息;所述特定信息用于目标基站选择频点供终端接入;接收所述目标基站的切换请求响应消息;所述切换请求响应消息包括切换频点信息;向终端发送切换命令;所述切换命令包括切换频点信息。另一方面,目标基站接收源基站的切换请求消息;当所述切换请求消息中包括特定信息、并且所述目标基站支持重叠频段时,依据终端能力、所述特定消息中携带的终端驻留频点以及预设切换规则获得切换频点;所述目标基站向所述源基站发送携带有所述切换频点信息的切换请求响应消息。如此,采用本发明实施例的技术方案,源基站依据终端能力、目标基站能力以及目标切换频点的情况进行分析判定,在切换请求消息中新增一个信息,通过对新增信息中的标识,以便目标基站能够依据终端能力选择合适的切换频点供终端接入,从而解决了重叠频段的切换失败的问题,保证终端切换的成功。In the handover method and base station provided by the embodiments of the present invention, on the one hand, the source base station sends a handover request message carrying specific information to the target base station; the specific information is used by the target base station to select a frequency point for the terminal to access; The handover request response message includes the handover frequency information; a handover command is sent to the terminal; the handover command includes the handover frequency information. On the other hand, the target base station receives the handover request message from the source base station; when the handover request message includes specific information, and the target base station supports overlapping frequency bands, according to the terminal capability, the terminal resident frequency carried in the specific message A handover frequency point is obtained by using a preset handover rule and a handover frequency point; the target base station sends a handover request response message carrying the handover frequency point information to the source base station. In this way, using the technical solutions of the embodiments of the present invention, the source base station analyzes and determines according to the terminal capability, the target base station capability, and the target handover frequency, and adds a piece of information to the handover request message. In this way, the target base station can select a suitable handover frequency point for the terminal to access according to the terminal capability, thereby solving the problem of handover failure in overlapping frequency bands and ensuring the success of the terminal handover.

附图说明Description of drawings

图1为本发明实施例一的切换方法的流程示意图;FIG. 1 is a schematic flowchart of a handover method according to Embodiment 1 of the present invention;

图2为本发明实施例一中源基站判定在切换请求中是否增加特定信息的流程示意图;2 is a schematic flowchart of a source base station judging whether to add specific information in a handover request in Embodiment 1 of the present invention;

图3为本发明实施例二的切换方法的流程示意图;3 is a schematic flowchart of a handover method according to Embodiment 2 of the present invention;

图4为本发明实施例二中目标基站选择切换频点的流程示意图;4 is a schematic flowchart of a target base station selecting a handover frequency point in Embodiment 2 of the present invention;

图5为本发明实施例三的切换方法的流程示意图;5 is a schematic flowchart of a handover method according to Embodiment 3 of the present invention;

图6为本发明实施例的基站的第一种组成结构示意图;6 is a schematic diagram of a first composition structure of a base station according to an embodiment of the present invention;

图7为本发明实施例的基站的第二种组成结构示意图。FIG. 7 is a schematic diagram of a second composition structure of a base station according to an embodiment of the present invention.

具体实施方式Detailed ways

本申请发明人发现,在基于X2接口的切换过程中,依据3GPP 36.423协议,源小区需要在切换请求(HANDOVER REQUEST)消息中携带AS安全信息(AS SecurityInformation);所述AS Security Information中携带Key eNodeB Star信元(以下均记为KeNB*)。依据3GPP 33.401中描述:源小区使用目标小区物理小区标识(PCI,Physical CellIdentifier)、下行链路载波频点(DL-EARFCN)和源小区(KeNB)去计算供目标小区使用的KeNB*,并发送给目标小区,目标小区收到KeNB*后直接使用。UE侧获取切换命令后(含目标基站传给UE的EARFCN),通过相同的方法计算KeNB*。The inventor of the present application found that in the handover process based on the X2 interface, according to the 3GPP 36.423 protocol, the source cell needs to carry the AS security information (AS SecurityInformation) in the handover request (HANDOVER REQUEST) message; the AS Security Information carries the Key eNodeB Star cell (hereinafter referred to as KeNB*). According to the description in 3GPP 33.401: the source cell uses the physical cell identifier (PCI, Physical CellIdentifier) of the target cell, the downlink carrier frequency point (DL-EARFCN) and the source cell (KeNB) to calculate the KeNB* used by the target cell, and send For the target cell, the target cell will use it directly after receiving the KeNB*. After the UE side obtains the handover command (including the EARFCN transmitted by the target base station to the UE), KeNB* is calculated by the same method.

依据3GPP 36.331协议,针对Key eNodeB Star描述如下:若目标小区为重叠频段小区,源小区选择与UE初始接入目标小区选择带宽(band)相同逻辑的方式去计算目标侧频点(ARFCN),从而计算KeNB*。According to the 3GPP 36.331 protocol, the description for the Key eNodeB Star is as follows: If the target cell is an overlapping frequency band cell, the source cell selects the same logical method as the UE's initial access target cell selection bandwidth (band) to calculate the target side frequency point (ARFCN), thus Calculate KeNB*.

对于重叠频段小区,以具备重叠频段能力(譬如B38/B41)且支持多频段指示增强的终端在不同类型基站间X2接口切换(如从支持重叠频段能力(譬如B38/B41)且支持多频段指示增强的基站向支持重叠频段能力(譬如B38/B41)但不支持多频段指示增强的基站间切换)为例,如源小区支持多频段指示增强和B38/B41,目标小区支持B38/B41但不支持多频段指示增强,这样,支持B38/B41且支持多频段指示增强的终端接入源小区时将使用B41接入,切换至目标小区时,源小区将会使用band41作为DL-ARFCN去计算KeNB*,而目标小区将会使用band38传递给终端,终端将采用band38作为DL-ARFCN去计算KeNB*,这样终端和目标小区的KeNB*将不一致,从而导致X2接口切换失败。For cells with overlapping frequency bands, the terminal with overlapping frequency band capability (such as B38/B41) and supporting multi-band indication enhancement can switch the X2 interface between different types of base stations (for example, from supporting overlapping frequency band capability (such as B38/B41) and supporting multi-band indication The enhanced base station supports the ability of overlapping frequency bands (such as B38/B41) but does not support the handover between base stations of multi-band indication enhancement) as an example, for example, the source cell supports multi-band indication enhancement and B38/B41, and the target cell supports B38/B41 but does not support B38/B41. Support multi-band indication enhancement, so that the terminal that supports B38/B41 and supports multi-band indication enhancement will use B41 access when accessing the source cell, and when switching to the target cell, the source cell will use band41 as the DL-ARFCN to calculate the KeNB *, and the target cell will use band38 to transmit to the terminal, and the terminal will use band38 as the DL-ARFCN to calculate the KeNB*, so the KeNB* of the terminal and the target cell will be inconsistent, resulting in the failure of the X2 interface handover.

基于此,提出本发明以下各实施例。Based on this, the following embodiments of the present invention are proposed.

下面结合附图及具体实施例对本发明作进一步详细的说明。The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

实施例一Example 1

本发明实施例提供了一种切换方法。图1为本发明实施例一的切换方法的流程示意图;如图1所示,所述方法包括:The embodiment of the present invention provides a handover method. FIG. 1 is a schematic flowchart of a handover method according to Embodiment 1 of the present invention; as shown in FIG. 1 , the method includes:

步骤101:源基站向目标基站发送携带有特定信息的切换请求消息;所述特定信息用于目标基站选择频点供终端接入。Step 101: The source base station sends a handover request message carrying specific information to the target base station; the specific information is used by the target base station to select a frequency point for the terminal to access.

步骤102:接收所述目标基站的切换请求响应消息;所述切换请求响应消息包括切换频点信息。Step 102: Receive a handover request response message from the target base station; the handover request response message includes handover frequency point information.

步骤103:向终端发送切换命令;所述切换命令包括切换频点信息。Step 103: Send a handover command to the terminal; the handover command includes handover frequency information.

本实施例中,所述源基站接收到终端的测量报告后,确定发起所述终端对应的切换操作。In this embodiment, after receiving the measurement report of the terminal, the source base station determines to initiate a handover operation corresponding to the terminal.

作为一种实施方式,所述源基站向目标基站发送携带有特定信息的切换请求消息之前,所述方法还包括:所述源基站对目标基站的能力、终端能力以及目标切换频点进行分析,基于分析结果判定在切换请求消息中是否增加特定信息。As an implementation manner, before the source base station sends a handover request message carrying specific information to the target base station, the method further includes: the source base station analyzes the capability of the target base station, the terminal capability and the target handover frequency point, Whether to add specific information to the handover request message is determined based on the analysis result.

本实施例中,所述源基站对目标基站的能力、终端能力以及目标切换频点进行分析,基于分析结果判定在切换请求消息中是否增加特定信息,包括:In this embodiment, the source base station analyzes the capability of the target base station, the terminal capability and the target handover frequency, and determines whether to add specific information to the handover request message based on the analysis result, including:

当所述目标基站支持重叠频段、且所述终端支持重叠频段、且所述目标切换频点为重叠频段时,判定在切换请求消息中增加特定信息;When the target base station supports overlapping frequency bands, the terminal supports overlapping frequency bands, and the target handover frequency is an overlapping frequency band, determining that specific information is added to the handover request message;

相应的,当所述目标基站不支持重叠频段、或所述终端不支持重叠频段、或所述目标切换频点不是重叠频段时,判定在切换请求消息中不增加所述特定信息。Correspondingly, when the target base station does not support overlapping frequency bands, or the terminal does not support overlapping frequency bands, or the target handover frequency is not an overlapping frequency band, it is determined that the specific information is not added to the handover request message.

具体的,图2为本发明实施例一中源基站判定在切换请求中是否增加特定信息的流程示意图;如图2所示,所述方法包括:Specifically, FIG. 2 is a schematic flowchart of a source base station determining whether to add specific information to a handover request in Embodiment 1 of the present invention; as shown in FIG. 2 , the method includes:

步骤201:源基站确定发起切换操作。Step 201: The source base station determines to initiate a handover operation.

步骤202:判断终端是否支持重叠频段;当判定终端支持重叠频段时,执行步骤203;当判定终端不支持重叠频段时,执行步骤206。Step 202: Determine whether the terminal supports the overlapping frequency band; when it is determined that the terminal supports the overlapping frequency band, step 203 is performed; when it is determined that the terminal does not support the overlapping frequency band, step 206 is performed.

步骤203:判断目标基站是否支持重叠频段;当判定目标基站支持重叠频段时,执行步骤204;当判定目标基站不支持重叠频段时,执行步骤206。Step 203 : determine whether the target base station supports overlapping frequency bands; when it is determined that the target base station supports overlapping frequency bands, go to step 204 ; when it is determined that the target base station does not support overlapping frequency bands, go to step 206 .

步骤204:判断目标切换频点是否为重叠频段;当判定目标切换频点为重叠频段时,执行步骤205;当判定目标切换频点不是重叠频段时,执行步骤206。Step 204 : determine whether the target switching frequency is an overlapping frequency band; when it is determined that the target switching frequency is an overlapping frequency band, go to step 205 ; when it is determined that the target switching frequency is not an overlapping frequency band, go to step 206 .

步骤205:在切换请求中添加特定信息。Step 205: Add specific information to the handover request.

步骤206:按照现有协议规定对切换操作进行处理。Step 206: Process the handover operation according to the existing protocol.

本实施例中,在切换请求(HANDOVER_REQUEST)消息中添加特定信息;所述特定信息具体可以为AS Security Information(Special)信息。具体的,本实施例中所述的切换请求(HANDOVER_REQUEST)消息可通过表1表示;从表1可以看出,本实施例中所述切换请求(HANDOVER_REQUEST)消息中新增一字段,所述字段用于标识AS Security Information(Special)信息,即当基于图2所示的判定方式,确定所述目标基站支持重叠频段、且所述终端支持重叠频段、且所述目标切换频点为重叠频段时,在所述字段添加AS SecurityInformation(Special)信息;相应的,确定所述目标基站不支持重叠频段、或者所述终端不支持重叠频段、或者所述目标切换频点不是重叠频段时,与现有协议切换流程相同,在所述字段不添加AS Security Information(Special)信息。具体的,所述特定信息包括:源基站加密秘钥(KeNBsrc)、终端驻留频点和网络色码(NCC,Next Hop Chaining Count)。即ASSecurity Information(Special)信息包括:源基站加密秘钥(KeNBsrc)、终端驻留频点和NCC。具体的,所述特定信息(即AS Security Information(Special)信息)可通过表2所示。In this embodiment, specific information is added in the handover request (HANDOVER_REQUEST) message; the specific information may specifically be AS Security Information (Special) information. Specifically, the handover request (HANDOVER_REQUEST) message in this embodiment can be represented by Table 1; it can be seen from Table 1 that a new field is added to the handover request (HANDOVER_REQUEST) message in this embodiment, the field Used to identify AS Security Information (Special) information, that is, when it is determined that the target base station supports overlapping frequency bands, the terminal supports overlapping frequency bands, and the target switching frequency is an overlapping frequency band based on the determination method shown in FIG. 2 , add AS SecurityInformation (Special) information in the field; correspondingly, when it is determined that the target base station does not support overlapping frequency bands, or that the terminal does not support overlapping frequency bands, or that the target switching frequency is not an overlapping frequency band, the same as the existing The protocol switching process is the same, and no AS Security Information (Special) information is added to the field. Specifically, the specific information includes: source base station encryption key (KeNBsrc), terminal resident frequency and network color code (NCC, Next Hop Chaining Count). That is, the ASSecurity Information (Special) information includes: the source base station encryption key (KeNBsrc), the terminal resident frequency, and the NCC. Specifically, the specific information (ie, AS Security Information (Special) information) can be shown in Table 2.

Figure BDA0000987498710000081
Figure BDA0000987498710000081

表1Table 1

Figure BDA0000987498710000082
Figure BDA0000987498710000082

表2Table 2

本实施例中,所述源基站接收所述目标基站的切换请求响应消息;所述切换请求响应消息包括切换频点信息;所述切换频点信息可包括:切换频点和NCC;所述源基站向终端发送切换命令;所述切换命令包括所述切换频点信息;所述切换频点信息可包括:切换频点和NCC。所述终端接收到所述源基站的切换命令后,基于所述切换命令中的切换频点和NCC,结合源基站加密秘钥(KeNBsrc)计算加密秘钥(KeNBsrc),以便于终端通过计算获得的加密秘钥(KeNBsrc)和目标基站计算获得的加密秘钥(KeNBsrc)进行完整性认证过程,从而所述终端和所述目标基站能够进行通信。In this embodiment, the source base station receives a handover request response message from the target base station; the handover request response message includes handover frequency information; the handover frequency information may include: handover frequency and NCC; the source The base station sends a handover command to the terminal; the handover command includes the handover frequency point information; the handover frequency point information may include: the handover frequency point and the NCC. After the terminal receives the handover command from the source base station, based on the handover frequency and NCC in the handover command, the encryption key (KeNBsrc) is calculated in combination with the encryption key (KeNBsrc) of the source base station, so that the terminal can obtain by calculation. The encryption key (KeNBsrc) obtained by the target base station and the encryption key (KeNBsrc) calculated by the target base station perform an integrity authentication process, so that the terminal and the target base station can communicate.

采用本发明实施例的技术方案,源基站依据终端能力、目标基站能力以及目标切换频点的情况进行分析判定,在切换请求消息中新增一个信息,通过对新增信息中的标识,以便目标基站能够依据终端能力选择合适的切换频点供终端接入,从而解决了重叠频段的切换失败的问题,保证终端切换的成功。By adopting the technical solution of the embodiment of the present invention, the source base station analyzes and determines according to the terminal capability, the target base station capability and the target handover frequency, adds a piece of information to the handover request message, The base station can select a suitable handover frequency point for the terminal to access according to the capability of the terminal, thereby solving the problem of handover failure in overlapping frequency bands and ensuring the success of the handover of the terminal.

实施例二Embodiment 2

本发明实施例还提供了一种切换方法。图3为本发明实施例二的切换方法的流程示意图;如图3所示,所述方法包括:The embodiment of the present invention also provides a handover method. FIG. 3 is a schematic flowchart of a handover method according to Embodiment 2 of the present invention; as shown in FIG. 3 , the method includes:

步骤301:目标基站接收源基站的切换请求消息。Step 301: The target base station receives a handover request message from the source base station.

步骤302:当所述切换请求消息中包括特定信息、并且所述目标基站支持重叠频段时,所述目标基站依据终端能力、所述特定消息中携带的终端驻留频点以及预设切换规则获得切换频点信息。Step 302: When the handover request message includes specific information and the target base station supports overlapping frequency bands, the target base station obtains the frequency based on the terminal capability, the terminal camping frequency carried in the specific message, and the preset handover rule. Toggle frequency information.

步骤303:所述目标基站向所述源基站发送携带有所述切换频点信息的切换请求响应消息。Step 303: The target base station sends a handover request response message carrying the handover frequency point information to the source base station.

具体的,图4为本发明实施例二中目标基站选择切换频点的流程示意图;如图4所示,目标基站选择却换频点的过程包括:Specifically, FIG. 4 is a schematic flowchart of a target base station selecting a switching frequency point in Embodiment 2 of the present invention; as shown in FIG. 4 , the process of selecting a switching frequency point by the target base station includes:

步骤401:目标基站接收到源基站的切换请求消息。Step 401: The target base station receives a handover request message from the source base station.

步骤402:所述目标基站判断自身是否支持重叠频段;当判定自身支持重叠频段时,执行步骤403;当判定自身不支持重叠频段时,执行步骤406。Step 402 : the target base station determines whether it supports overlapping frequency bands; when it determines that it supports overlapping frequency bands, executes step 403 ; when it determines that it does not support overlapping frequency bands, executes step 406 .

步骤403:检测切换请求消息中是否存在特定信息;当判定切换请求消息中存在特定信息时,执行步骤404至步骤405;当判定切换请求消息中不存在特定信息时,执行步骤406。Step 403: Detect whether there is specific information in the handover request message; when it is determined that there is specific information in the handover request message, perform steps 404 to 405; when it is determined that there is no specific information in the handover request message, perform step 406.

步骤404:提取切换请求消息中的特定信息。Step 404: Extract specific information in the handover request message.

步骤405:依据终端能力和预设切换规则确定切换频点,并计算加密秘钥。Step 405: Determine the switching frequency point according to the terminal capability and the preset switching rule, and calculate the encryption key.

步骤406:按照现有协议规定进行处理。Step 406: Process according to the existing protocol.

本实施例中,所述目标基站接收源基站的切换请求(HANDOVER_REQUEST)消息;判断所述切换请求消息中是否携带有特定消息。所述切换请求消息具体可参照实施例一中表1所示,则所述特定信息可以为AS Security Information(Special)信息。具体判定所述切换请求消息中是否携带AS Security Information(Special);当判定所述切换请求消息中未携带AS Security Information(Special)时,则按照现有协议的处理流程处理;当判定所述切换请求消息中携带AS Security Information(Special)信息、并且所述目标基站支持重叠频段时,所述目标基站依据终端能力、所述AS Security Information(Special)中的终端驻留频点(例如表2所示的驻留EARFCN)以及预设切换规则选择切换频点。In this embodiment, the target base station receives a handover request (HANDOVER_REQUEST) message from the source base station, and determines whether the handover request message carries a specific message. For details of the handover request message, refer to Table 1 in Embodiment 1, and the specific information may be AS Security Information (Special) information. It is specifically determined whether the handover request message carries AS Security Information (Special); when it is determined that the handover request message does not carry AS Security Information (Special), it is processed according to the processing flow of the existing protocol; when it is determined that the handover request message does not carry AS Security Information (Special) When the request message carries AS Security Information (Special) information, and the target base station supports overlapping frequency bands, the target base station is based on the terminal capability, the terminal residency frequency in the AS Security Information (Special) (for example, as shown in Table 2). EARFCN) and the preset switching rule to select the switching frequency.

具体的,本实施例中,所述依据终端能力、所述特定消息中携带的终端驻留频点以及预设切换规则获得切换频点信息,包括:Specifically, in this embodiment, the obtaining handover frequency information according to the terminal capability, the terminal resident frequency carried in the specific message, and the preset handover rule includes:

当预设切换规则表明终端驻留频点为第一优先级时,则所述目标基站选择所述终端驻留频点为切换频点;When the preset handover rule indicates that the terminal camping frequency point is the first priority, the target base station selects the terminal camping frequency point as the handover frequency point;

当预设切换规则表明重叠频段中最大的频段为第一优先级时,则所述目标基站选择所述最大的频段为切换频点;When the preset handover rule indicates that the largest frequency band in the overlapping frequency bands is the first priority, the target base station selects the largest frequency band as the handover frequency point;

当预设切换规则表明按照终端初始接入目标基站选择的频点作为切换频点时,则所述目标基站依据终端能力,选择所述终端初始接入的频点作为切换频点。When the preset handover rule indicates that the frequency selected by the terminal initially accesses the target base station as the handover frequency, the target base station selects the frequency initially accessed by the terminal as the handover frequency according to the terminal capability.

以及,作为一种实施方式,所述特定信息还包括:源基站加密秘钥和NCC;则所述目标基站基于所述源基站加密秘钥、NCC和所述切换频点计算加密秘钥。And, as an implementation manner, the specific information further includes: source base station encryption key and NCC; then the target base station calculates the encryption key based on the source base station encryption key, NCC and the handover frequency.

例如,运营商切换规则要求以终端当前驻留频点为第一优先级,则目标基站优先选择终端当前驻留频点为切换频点;以及,所述目标基站依据源站密钥(KeNBsrc)、NCC、选择的所述切换频点(EARFCN)计算加密秘钥(KeNBdst)以供目标基站和终端进行完整性认证过程,从而使所述终端和所述目标基站能够进行通信。For example, if the operator's handover rule requires that the terminal's current camping frequency is the first priority, the target base station preferentially selects the terminal's current camping frequency as the handover frequency; and, the target base station is based on the source station key (KeNBsrc) , NCC, and the selected handover frequency point (EARFCN) to calculate an encryption key (KeNBdst) for the target base station and the terminal to perform an integrity authentication process, so that the terminal and the target base station can communicate.

再例如,运营商切换规则要求重叠频段中大频段为第一优先级(如B38/B41重叠频段,优先选择B41),则目标基站忽略终端当前驻留频点,选择重叠频段中大频段(例如B41)作为切换频点;以及,所述目标基站依据源站密钥(KeNBsrc)、NCC、选择的所述切换频点(EARFCN)计算加密秘钥(KeNBdst)以供目标基站和终端进行完整性认证过程,从而使所述终端和所述目标基站能够进行通信。For another example, if the operator's handover rules require that the large and medium frequency bands in the overlapping frequency bands are the first priority (such as B38/B41 overlapping frequency bands, B41 is preferred). B41) as the handover frequency point; and, the target base station calculates the encryption key (KeNBdst) according to the source station key (KeNBsrc), NCC, and the selected handover frequency point (EARFCN) for the target base station and the terminal to perform integrity authentication process, thereby enabling the terminal and the target base station to communicate.

又例如,运营商切换规则按照终端初始接入目标基站选择的频点为切换频点,则所述目标基站依据终端能力进行判断,选择终端初始接入选择的频点为切换频点;以及,所述目标基站依据源站密钥(KeNBsrc)、NCC、选择的所述切换频点(EARFCN)计算加密秘钥(KeNBdst)以供目标基站和终端进行完整性认证过程,从而使所述终端和所述目标基站能够进行通信。For another example, the operator's handover rule selects the frequency selected by the terminal for initial access to the target base station as the handover frequency, and the target base station judges according to the terminal capability, and selects the frequency selected by the terminal for initial access as the handover frequency; and, The target base station calculates an encryption key (KeNBdst) according to the source station key (KeNBsrc), NCC, and the selected handover frequency point (EARFCN) for the target base station and the terminal to perform an integrity authentication process, so that the terminal and the terminal can perform an integrity authentication process. The target base station is capable of communication.

进一步地,所述目标基站将切换频点信息(所述切换频点信息具体可以包括切换频点和NCC)添加至切换请求响应(HANDOVER REQUEST ACKNOWLEDGE)消息中,将所述切换请求响应消息发送至源基站,由所述源基站将所述切换频点信息发送至终端。Further, the target base station adds the handover frequency point information (the handover frequency point information may specifically include the handover frequency point and NCC) to the handover request response (HANDOVER REQUEST ACKNOWLEDGE) message, and sends the handover request response message to the A source base station, where the source base station sends the handover frequency point information to the terminal.

采用本发明实施例的技术方案,源基站依据终端能力、目标基站能力以及目标切换频点的情况进行分析判定,在切换请求消息中新增一个信息,通过对新增信息中的标识,以便目标基站能够依据终端能力选择合适的切换频点供终端接入,从而解决了重叠频段的切换失败的问题,保证终端切换的成功。By adopting the technical solution of the embodiment of the present invention, the source base station analyzes and determines according to the terminal capability, the target base station capability and the target handover frequency, adds a piece of information to the handover request message, The base station can select a suitable handover frequency point for the terminal to access according to the capability of the terminal, thereby solving the problem of handover failure in overlapping frequency bands and ensuring the success of the handover of the terminal.

实施例三Embodiment 3

本发明实施例还提供了一种切换方法。图5为本发明实施例三的切换方法的流程示意图;如图5所示,所述方法包括:The embodiment of the present invention also provides a handover method. FIG. 5 is a schematic flowchart of a handover method according to Embodiment 3 of the present invention; as shown in FIG. 5 , the method includes:

步骤501:用户设备(UE)向源基站发送测量报告。Step 501: User Equipment (UE) sends a measurement report to the source base station.

步骤502:所述源基站接收到所述测量报告,确定发起切换操作时,对目标基站的能力、终端能力以及目标切换频点进行分析,基于分析结果判定在切换请求(HANDOVER_REQUEST)消息中是否增加AS Security Information(Special)。具体的判定在切换请求(HANDOVER_REQUEST)消息中是否增加AS Security Information(Special)的方法可参照实施例一中所述,这里不再赘述。Step 502: The source base station receives the measurement report and determines that when a handover operation is initiated, it analyzes the capability of the target base station, the terminal capability, and the target handover frequency, and based on the analysis result, it is determined whether to increase the value in the handover request (HANDOVER_REQUEST) message. AS Security Information (Special). For the specific method of determining whether to add AS Security Information (Special) in the handover request (HANDOVER_REQUEST) message, reference may be made to the method described in Embodiment 1, which will not be repeated here.

步骤503:所述源基站将所述切换请求(HANDOVER_REQUEST)消息发送至所述目标基站。Step 503: The source base station sends the handover request (HANDOVER_REQUEST) message to the target base station.

步骤504:所述目标基站接收到所述源基站的切换请求(HANDOVER_REQUEST)消息,检测HANDOVER_REQUEST是否包含AS Security Information(Special);确定HANDOVER_REQUEST包含AS Security Information(Special)时,AS Security Information(Special)包括:源基站加密秘钥(KeNBsrc)、终端驻留频点和NCC;所述目标基站提取其中的源基站加密秘钥(KeNBsrc)、终端驻留频点和NCC,依据终端能力、终端驻留频点以及预设切换规则选择切换频点,其中,切换频点的选择方式具体可参照实施例二中所述,这里不再赘述。将选择的所述切换频点和NCC添加至切换请求响应(HANDOVER REQUESTACKNOWLEDGE)消息中。Step 504: The target base station receives the handover request (HANDOVER_REQUEST) message from the source base station, and detects whether the HANDOVER_REQUEST contains AS Security Information (Special); when it is determined that the HANDOVER_REQUEST contains AS Security Information (Special), the AS Security Information (Special) includes : source base station encryption key (KeNBsrc), terminal resident frequency and NCC; the target base station extracts the source base station encryption key (KeNBsrc), terminal resident frequency and NCC, according to the terminal capability, terminal resident frequency The switching frequency points are selected according to the point and the preset switching rule, and the specific selection method of the switching frequency points can be referred to as described in the second embodiment, which will not be repeated here. The selected handover frequency point and NCC are added to the handover request response (HANDOVER REQUESTACKNOWLEDGE) message.

步骤505:所述目标基站将切换请求响应(HANDOVER REQUEST ACKNOWLEDGE)消息发送至所述源基站。Step 505: The target base station sends a HANDOVER REQUEST ACKNOWLEDGE message to the source base station.

步骤506:所述源基站向UE发送切换命令,所述切换命令中携带切换频点和NCC。所述UE基于所述切换命令中的切换频点和NCC,结合源基站加密秘钥(KeNBsrc)计算加密秘钥(KeNBsrc),以便于终端和目标基站进行完整性认证过程,从而使所述终端和所述目标基站能够进行通信。Step 506: The source base station sends a handover command to the UE, where the handover command carries the handover frequency and NCC. The UE calculates the encryption key (KeNBsrc) based on the handover frequency and NCC in the handover command and in combination with the encryption key (KeNBsrc) of the source base station, so that the terminal and the target base station can perform the integrity authentication process, so that the terminal can perform the integrity authentication process. and can communicate with the target base station.

采用本发明实施例的技术方案,源基站依据终端能力、目标基站能力以及目标切换频点的情况进行分析判定,在切换请求消息中新增一个信息,通过对新增信息中的标识,以便目标基站能够依据终端能力选择合适的切换频点供终端接入,从而解决了重叠频段的切换失败的问题,保证终端切换的成功。By adopting the technical solution of the embodiment of the present invention, the source base station analyzes and determines according to the terminal capability, the target base station capability and the target handover frequency, adds a piece of information to the handover request message, The base station can select a suitable handover frequency point for the terminal to access according to the capability of the terminal, thereby solving the problem of handover failure in overlapping frequency bands and ensuring the success of the handover of the terminal.

实施例四Embodiment 4

本发明实施例还提供了一种基站,所述基站为源基站。图6为本发明实施例的基站的第一种组成结构示意图;如图6所示,第一发送单元61和第一接收单元62;其中,An embodiment of the present invention further provides a base station, where the base station is a source base station. FIG. 6 is a schematic diagram of a first composition structure of a base station according to an embodiment of the present invention; as shown in FIG. 6, a first sending unit 61 and a first receiving unit 62; wherein,

所述第一发送单元61,用于向目标基站发送携带有特定信息的切换请求消息;所述特定信息用于目标基站选择频点供终端接入;The first sending unit 61 is configured to send a handover request message carrying specific information to the target base station; the specific information is used by the target base station to select a frequency point for the terminal to access;

所述第一接收单元62,用于接收所述目标基站的切换请求响应消息;所述切换请求响应消息包括切换频点信息;The first receiving unit 62 is configured to receive a handover request response message of the target base station; the handover request response message includes handover frequency point information;

所述第一发送单元61,还用于向终端发送切换命令;所述切换命令包括切换频点信息。The first sending unit 61 is further configured to send a handover command to the terminal; the handover command includes handover frequency point information.

作为一种实施方式,所述基站还包括第一处理单元63,用于所述第一发送单元61向目标基站发送携带有特定信息的切换请求消息之前,对目标基站的能力、终端能力以及目标切换频点进行分析,基于分析结果判定在切换请求消息中是否增加特定信息。As an implementation manner, the base station further includes a first processing unit 63, which is used for checking the capabilities of the target base station, terminal capabilities, and target The handover frequency point is analyzed, and based on the analysis result, it is determined whether to add specific information to the handover request message.

本实施例中,所述第一接收单元62接收到终端的测量报告后,所述第一处理单元63确定发起所述终端对应的切换操作。In this embodiment, after the first receiving unit 62 receives the measurement report of the terminal, the first processing unit 63 determines to initiate a handover operation corresponding to the terminal.

本实施例中,所述第一处理单元63,用于当所述目标基站支持重叠频段、且所述终端支持重叠频段、且所述目标切换频点为重叠频段时,判定在切换请求消息中增加特定信息。相应的,所述第一处理单元63,用于当所述目标基站不支持重叠频段、或所述终端不支持重叠频段、或所述目标切换频点不是重叠频段时,判定在切换请求消息中不增加所述特定信息。In this embodiment, the first processing unit 63 is configured to determine that in the handover request message when the target base station supports overlapping frequency bands, the terminal supports overlapping frequency bands, and the target handover frequency is an overlapping frequency band Add specific information. Correspondingly, the first processing unit 63 is configured to determine that in the handover request message when the target base station does not support overlapping frequency bands, or the terminal does not support overlapping frequency bands, or the target switching frequency point is not an overlapping frequency band The specific information is not added.

本实施例中,所述第一处理单元63在切换请求(HANDOVER_REQUEST)消息中添加特定信息;所述特定信息具体可以为AS Security Information(Special)信息。具体的,本实施例中所述的切换请求(HANDOVER_REQUEST)消息可通过表1表示;从表1可以看出,本实施例中所述切换请求(HANDOVER_REQUEST)消息中新增一字段,所述字段用于标识ASSecurity Information(Special)信息,即当基于图2所示的判定方式,确定所述目标基站支持重叠频段、且所述终端支持重叠频段、且所述目标切换频点为重叠频段时,在所述字段添加AS Security Information(Special)信息;相应的,确定所述目标基站不支持重叠频段、或者所述终端不支持重叠频段、或者所述目标切换频点不是重叠频段时,与现有协议切换流程相同,在所述字段不添加AS Security Information(Special)信息。具体的,所述特定信息包括:源基站加密秘钥(KeNBsrc)、终端驻留频点和网络色码(NCC,Next HopChaining Count)。即AS Security Information(Special)信息包括:源基站加密秘钥(KeNBsrc)、终端驻留频点和NCC。具体的,所述特定信息(即AS Security Information(Special)信息)可通过表2所示。In this embodiment, the first processing unit 63 adds specific information in the handover request (HANDOVER_REQUEST) message; the specific information may specifically be AS Security Information (Special) information. Specifically, the handover request (HANDOVER_REQUEST) message described in this embodiment can be represented by Table 1; it can be seen from Table 1 that a new field is added to the handover request (HANDOVER_REQUEST) message described in this embodiment, the field Used to identify ASSecurity Information (Special) information, that is, when it is determined that the target base station supports overlapping frequency bands, the terminal supports overlapping frequency bands, and the target switching frequency is an overlapping frequency band based on the judgment method shown in FIG. 2 , Add AS Security Information (Special) information in the field; correspondingly, when it is determined that the target base station does not support overlapping frequency bands, or that the terminal does not support overlapping frequency bands, or that the target switching frequency is not an overlapping frequency band, the same as the existing The protocol switching process is the same, and no AS Security Information (Special) information is added to the field. Specifically, the specific information includes: source base station encryption key (KeNBsrc), terminal resident frequency, and network color code (NCC, Next HopChaining Count). That is, the AS Security Information (Special) information includes: source base station encryption key (KeNBsrc), terminal resident frequency and NCC. Specifically, the specific information (ie, AS Security Information (Special) information) can be shown in Table 2.

作为一种实施方式,当所述第一发送单元61将所述切换请求消息发送至所述目标基站后,所述第一接收单元62,还用于接收所述目标基站的切换请求响应消息;所述切换请求响应消息包括切换频点信息;所述第一发送单元61,还用于向终端发送切换命令;所述切换命令包括切换频点信息。所述终端接收到所述源基站的切换命令后,基于所述切换命令中的切换频点信息(所述切换频点信息可以包括切换频点和NCC),结合源基站加密秘钥(KeNBsrc)计算加密秘钥(KeNBsrc),以便于终端和目标基站完整性认证过程,从而所述终端和所述目标基站能够进行通信。As an implementation manner, after the first sending unit 61 sends the handover request message to the target base station, the first receiving unit 62 is further configured to receive a handover request response message from the target base station; The handover request response message includes handover frequency information; the first sending unit 61 is further configured to send a handover command to the terminal; the handover command includes handover frequency information. After the terminal receives the handover command from the source base station, based on the handover frequency point information in the handover command (the handover frequency point information may include the handover frequency point and NCC), combined with the source base station encryption key (KeNBsrc) An encryption key (KeNBsrc) is calculated to facilitate the integrity authentication process between the terminal and the target base station, so that the terminal and the target base station can communicate.

本领域技术人员应当理解,本发明实施例的源基站中各处理单元的功能,可参照前述切换方法的相关描述而理解,本发明实施例的源基站中各处理单元,可通过实现本发明实施例所述的功能的模拟电路而实现,也可以通过执行本发明实施例所述的功能的软件在智能终端上的运行而实现。Those skilled in the art should understand that the functions of each processing unit in the source base station in the embodiment of the present invention can be understood by referring to the relevant description of the aforementioned handover method, and each processing unit in the source base station in the embodiment of the present invention can be implemented by implementing the present invention. It is realized by an analog circuit of the functions described in the embodiments of the present invention, and it can also be realized by running the software for executing the functions described in the embodiments of the present invention on the intelligent terminal.

在本发明实施例中,所述源基站中的第一处理单元63,在实际应用中均可由所述源基站中的中央处理器(CPU,Central Processing Unit)、数字信号处理器(DSP,DigitalSignal Processor)或可编程门阵列(FPGA,Field-Programmable Gate Array)实现;所述源基站中的第一发送单元61和第一接收单元62,在实际应用中可由所述源基站中的收发天线实现。In this embodiment of the present invention, the first processing unit 63 in the source base station may be composed of a central processing unit (CPU, Central Processing Unit), a digital signal processor (DSP, Digital Signal) in the source base station in practical applications Processor) or Field-Programmable Gate Array (FPGA, Field-Programmable Gate Array); the first transmitting unit 61 and the first receiving unit 62 in the source base station can be implemented by the transceiver antenna in the source base station in practical applications .

实施例五Embodiment 5

本发明实施例还提供了一种基站,所述基站为目标基站。图7为本发明实施例的基站的第二种组成结构示意图;如图7所示,所述基站包括:第二接收单元71、第二处理单元72和第二发送单元73;其中,An embodiment of the present invention further provides a base station, where the base station is a target base station. FIG. 7 is a schematic diagram of a second composition structure of a base station according to an embodiment of the present invention; as shown in FIG. 7 , the base station includes: a second receiving unit 71, a second processing unit 72 and a second sending unit 73; wherein,

所述第二接收单元71,用于接收源基站的切换请求消息;The second receiving unit 71 is configured to receive the handover request message of the source base station;

所述第二处理单元72,用于当所述第二接收单元71接收的所述切换请求消息中包括特定信息、并且所述目标基站支持重叠频段时,依据终端能力、所述特定消息中携带的终端驻留频点以及预设切换规则获得切换频点;The second processing unit 72 is configured to, when the handover request message received by the second receiving unit 71 includes specific information and the target base station supports overlapping frequency bands, according to the terminal capability, the specific message carries the information. The terminal resident frequency point and the preset switching rule are obtained to obtain the switching frequency point;

所述第二发送单元73,用于向所述源基站发送携带有所述切换频点信息的切换请求响应消息。The second sending unit 73 is configured to send a handover request response message carrying the handover frequency point information to the source base station.

本实施例中,所述第二接收单元接收源基站的切换请求(HANDOVER_REQUEST)消息;所述第二处理单元72判断所述切换请求消息中是否携带有特定消息。所述切换请求消息具体可参照实施例一中表1所示,则所述特定信息可以为AS Security Information(Special)信息。所述第二处理单元72具体判定所述切换请求消息中是否携带AS SecurityInformation(Special);当判定所述切换请求消息中未携带有AS Security Information(Special)时,则按照现有协议的处理流程处理;当判定所述切换请求消息中携带有ASSecurity Information(Special)、并且所述目标基站支持重叠频段时,所述第二处理单元72依据终端能力、所述AS Security Information(Special)中的终端驻留频点以及预设切换规则选择切换频点。In this embodiment, the second receiving unit receives a handover request (HANDOVER_REQUEST) message from the source base station; the second processing unit 72 determines whether the handover request message carries a specific message. For details of the handover request message, refer to Table 1 in Embodiment 1, and the specific information may be AS Security Information (Special) information. The second processing unit 72 specifically determines whether the handover request message carries AS Security Information (Special); when it is determined that the handover request message does not carry AS Security Information (Special), then according to the processing flow of the existing protocol processing; when it is determined that the handover request message carries ASSecurity Information (Special) and the target base station supports overlapping frequency bands, the second processing unit 72 determines that the terminal capability in the AS Security Information (Special) Dwell frequency and preset switching rule to select switching frequency.

具体的,本实施例中,所述第二处理单元72,用于当预设切换规则表明终端驻留频点为第一优先级时,则选择所述终端驻留频点为切换频点;当预设切换规则表明重叠频段中最大的频段为第一优先级时,则选择所述最大的频段为切换频点;当预设切换规则表明按照终端初始接入目标基站选择的频点作为切换频点时,则依据终端能力,选择所述终端初始接入的频点作为切换频点。Specifically, in this embodiment, the second processing unit 72 is configured to select the terminal resident frequency as the switching frequency when the preset switching rule indicates that the terminal resident frequency is the first priority; When the preset handover rule indicates that the largest frequency band in the overlapping frequency bands is the first priority, the largest frequency band is selected as the handover frequency; When the frequency point is selected, the frequency point initially accessed by the terminal is selected as the handover frequency point according to the capability of the terminal.

以及,作为一种实施方式,所述特定信息还包括:源基站加密秘钥和NCC;则所述第二处理单元72,还用于基于所述源基站加密秘钥、NCC和所述切换频点计算加密秘钥。And, as an implementation manner, the specific information further includes: the source base station encryption key and NCC; then the second processing unit 72 is further configured to encrypt the source base station encryption key, NCC and the switching frequency based on the source base station Click Calculate encryption key.

例如,运营商切换规则要求以终端当前驻留频点为第一优先级,则目标基站优先选择终端当前驻留频点为切换频点;以及,所述目标基站依据源站密钥(KeNBsrc)、NCC、选择的所述切换频点(EARFCN)计算加密秘钥(KeNBdst)以供目标基站和终端进行完整性认证过程,从而使所述终端和所述目标基站能够进行通信。For example, if the operator's handover rule requires that the terminal's current camping frequency is the first priority, the target base station preferentially selects the terminal's current camping frequency as the handover frequency; and, the target base station is based on the source station key (KeNBsrc) , NCC, and the selected handover frequency point (EARFCN) to calculate an encryption key (KeNBdst) for the target base station and the terminal to perform an integrity authentication process, so that the terminal and the target base station can communicate.

再例如,运营商切换规则要求重叠频段中大频段为第一优先级(如B38/B41重叠频段,优先选择B41),则目标基站忽略终端当前驻留频点,选择重叠频段中大频段(例如B41)作为切换频点;以及,所述目标基站依据源站密钥(KeNBsrc)、NCC、选择的所述切换频点(EARFCN)计算加密秘钥(KeNBdst)以供目标基站和终端进行完整性认证过程,从而使所述终端和所述目标基站能够进行通信。For another example, if the operator's handover rules require that the large and medium frequency bands in the overlapping frequency bands are the first priority (such as B38/B41 overlapping frequency bands, B41 is preferred). B41) as the handover frequency point; and, the target base station calculates the encryption key (KeNBdst) according to the source station key (KeNBsrc), NCC, and the selected handover frequency point (EARFCN) for the target base station and the terminal to perform integrity authentication process, thereby enabling the terminal and the target base station to communicate.

又例如,运营商切换规则按照终端初始接入目标基站选择的频点为切换频点,则所述目标基站依据终端能力进行判断,选择终端初始接入选择的频点为切换频点;以及,所述目标基站依据源站密钥(KeNBsrc)、NCC、选择的所述切换频点(EARFCN)计算加密秘钥(KeNBdst)以供目标基站和终端进行完整性认证过程,从而使所述终端和所述目标基站能够进行通信。For another example, the operator's handover rule selects the frequency selected by the terminal for initial access to the target base station as the handover frequency, and the target base station judges according to the terminal capability, and selects the frequency selected by the terminal for initial access as the handover frequency; and, The target base station calculates an encryption key (KeNBdst) according to the source station key (KeNBsrc), NCC, and the selected handover frequency point (EARFCN) for the target base station and the terminal to perform an integrity authentication process, so that the terminal and the terminal can perform an integrity authentication process. The target base station is capable of communication.

进一步地,所述第二处理单元72将切换频点信息(所述切换频点信息具体可以包括切换频点和NCC)添加至切换请求响应(HANDOVER REQUEST ACKNOWLEDGE)消息中,所述第二发送单元将所述切换请求响应消息发送至源基站,由所述源基站将所述切换频点信息发送至终端。Further, the second processing unit 72 adds the handover frequency information (the handover frequency information may specifically include the handover frequency and NCC) to the handover request response (HANDOVER REQUEST ACKNOWLEDGE) message, and the second sending unit The handover request response message is sent to the source base station, and the source base station sends the handover frequency point information to the terminal.

本领域技术人员应当理解,本发明实施例的目标基站中各处理单元的功能,可参照前述切换方法的相关描述而理解,本发明实施例的目标基站中各处理单元,可通过实现本发明实施例所述的功能的模拟电路而实现,也可以通过执行本发明实施例所述的功能的软件在智能终端上的运行而实现。Those skilled in the art should understand that the functions of each processing unit in the target base station in the embodiment of the present invention can be understood by referring to the relevant description of the aforementioned handover method, and each processing unit in the target base station in the embodiment of the present invention can be implemented by implementing the present invention. It is realized by an analog circuit of the functions described in the embodiments of the present invention, and it can also be realized by running the software for executing the functions described in the embodiments of the present invention on the intelligent terminal.

在本发明实施例中,所述目标基站中的第二处理单元72,在实际应用中均可由所述目标基站中的CPU、DSP或FPGA实现;所述目标基站中的第二接收单元和第二发送单元73,在实际应用中可由所述目标基站中的收发天线实现。In this embodiment of the present invention, the second processing unit 72 in the target base station may be implemented by a CPU, DSP or FPGA in the target base station in practical applications; the second receiving unit in the target base station and the first The second sending unit 73 can be implemented by the transceiver antenna in the target base station in practical application.

在本申请所提供的几个实施例中,应该理解到,所揭露的设备和方法,可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,如:多个单元或组件可以结合,或可以集成到另一个系统,或一些特征可以忽略,或不执行。另外,所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口,设备或单元的间接耦合或通信连接,可以是电性的、机械的或其它形式的。In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms. of.

上述作为分离部件说明的单元可以是、或也可以不是物理上分开的,作为单元显示的部件可以是、或也可以不是物理单元,即可以位于一个地方,也可以分布到多个网络单元上;可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。The unit described above as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

另外,在本发明各实施例中的各功能单元可以全部集成在一个处理单元中,也可以是各单元分别单独作为一个单元,也可以两个或两个以上单元集成在一个单元中;上述集成的单元既可以采用硬件的形式实现,也可以采用硬件加软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present invention may all be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integration The unit can be implemented either in the form of hardware or in the form of hardware plus software functional units.

本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:移动存储设备、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute Including the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: a mobile storage device, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk and other various A medium on which program code can be stored.

或者,本发明上述集成的单元如果以软件功能模块的形式实现并作为独立的产品销售或使用时,也可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括:移动存储设备、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of software products in essence or the parts that make contributions to the prior art. The computer software products are stored in a storage medium and include several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) is caused to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic disk or an optical disk and other mediums that can store program codes.

以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (13)

1. A method of handover, the method comprising:
a source base station sends a switching request message carrying specific information to a target base station; the specific information is used for the target base station to select a frequency point for the terminal to access;
receiving a switching request response message of the target base station; the switching request response message comprises switching frequency point information;
sending a switching command to the terminal; the switching command comprises switching frequency point information;
before the source base station sends a handover request message carrying specific information to a target base station, the method further includes:
and the source base station analyzes the capability of the target base station, the terminal capability and the target switching frequency point, and judges whether specific information is added in the switching request message or not based on the analysis result.
2. The method of claim 1, wherein the analyzing the capability of the target base station, the terminal capability and the target handover frequency point, and determining whether to add specific information in the handover request message based on the analysis result comprises:
and when the target base station supports the overlapped frequency band, the terminal supports the overlapped frequency band and the target switching frequency point is the overlapped frequency band, judging that specific information is added in the switching request message.
3. The method of claim 1, wherein the analyzing the capability of the target base station, the terminal capability and the target handover frequency point, and determining whether to add specific information in the handover request message based on the analysis result comprises:
and when the target base station does not support the overlapped frequency band, or the terminal does not support the overlapped frequency band, or the target switching frequency point is not the overlapped frequency band, judging that the specific information is not added in the switching request message.
4. The method according to any one of claims 1 to 3, wherein the specific information includes: and the source base station encrypts the secret key, the terminal resident frequency point and the network color code NCC.
5. A method of handover, the method comprising:
a target base station receives a switching request message of a source base station;
when the switching request message comprises specific information and the target base station supports overlapped frequency bands, acquiring switching frequency point information according to terminal capacity, a terminal resident frequency point carried in the specific information and a preset switching rule; the specific information is used for the target base station to select a frequency point for the terminal to access; the specific message is that the source base station analyzes the capability of the target base station, the terminal capability and the target switching frequency point, and judges whether to increase in the switching request message or not based on the analysis result;
and the target base station sends a switching request response message carrying the switching frequency point information to the source base station.
6. The method according to claim 5, wherein the obtaining of the information of the handover frequency point according to the terminal capability, the terminal camping frequency point carried in the specific message, and a preset handover rule comprises:
when a preset switching rule indicates that a terminal residing frequency point is a first priority, the target base station selects the terminal residing frequency point as a switching frequency point;
when a preset switching rule indicates that the largest frequency band in the overlapped frequency bands is a first priority, the target base station selects the largest frequency band as a switching frequency point;
and when the preset switching rule indicates that the frequency point selected according to the initial access of the terminal to the target base station is taken as the switching frequency point, the target base station selects the frequency point initially accessed by the terminal as the switching frequency point according to the terminal capability.
7. The method of claim 5, wherein the specific information further comprises: encrypting the secret key and the NCC by the source base station; the method further comprises the following steps:
and calculating an encryption key based on the encryption key of the source base station, the NCC and the switching frequency point.
8. A base station, the base station being a source base station; characterized in that the base station comprises: a first transmitting unit and a first receiving unit; wherein,
the first sending unit is used for sending a switching request message carrying specific information to a target base station; the specific information is used for the target base station to select a frequency point for the terminal to access;
the first receiving unit is configured to receive a handover request response message of the target base station; the switching request response message comprises switching frequency point information;
the first sending unit is further configured to send a handover command to the terminal; the switching command comprises switching frequency point information;
the base station also comprises a first processing unit, which is used for analyzing the capability of the target base station, the terminal capability and the target switching frequency point before the first sending unit sends the switching request message carrying the specific information to the target base station, and judging whether the specific information is added in the switching request message or not based on the analysis result.
9. The base station of claim 8, wherein the first processing unit is configured to determine to add specific information to the handover request message when the target base station supports an overlapped frequency band, the terminal supports an overlapped frequency band, and the target handover frequency point is an overlapped frequency band.
10. The base station of claim 8, wherein the first processing unit is configured to determine not to add the specific information in the handover request message when the target base station does not support an overlapping frequency band, or the terminal does not support an overlapping frequency band, or the target handover frequency point is not an overlapping frequency band.
11. A base station, the base station being a target base station; characterized in that the base station comprises: the second receiving unit, the second processing unit and the second sending unit; wherein,
the second receiving unit is configured to receive a handover request message of a source base station;
the second processing unit is configured to obtain a handover frequency point according to a terminal capability, a terminal residing frequency point carried in the specific message, and a preset handover rule when the handover request message received by the second receiving unit includes specific information and the target base station supports overlapping frequency bands; the specific information is used for the target base station to select a frequency point for the terminal to access; the specific message is that the source base station analyzes the capability of the target base station, the terminal capability and the target switching frequency point, and judges whether to increase in the switching request message or not based on the analysis result;
and the second sending unit is used for sending a switching request response message carrying the switching frequency point information to the source base station.
12. The base station of claim 11, wherein the second processing unit is configured to select the terminal residing frequency point as a handover frequency point when a preset handover rule indicates that the terminal residing frequency point is of a first priority; when the preset switching rule indicates that the largest frequency band in the overlapped frequency bands is the first priority, selecting the largest frequency band as a switching frequency point; and when the preset switching rule indicates that the frequency point selected according to the initial access of the terminal to the target base station is taken as the switching frequency point, selecting the frequency point initially accessed by the terminal as the switching frequency point according to the terminal capability.
13. The base station of claim 11, wherein the specific information further comprises: encrypting the secret key and the NCC by the source base station;
the second processing unit is further configured to calculate an encryption key based on the source base station encryption key, the NCC, and the handover frequency point.
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