WO2013020495A1 - 一种基站切换方法、基站、用户设备和通信系统 - Google Patents

一种基站切换方法、基站、用户设备和通信系统 Download PDF

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Publication number
WO2013020495A1
WO2013020495A1 PCT/CN2012/079748 CN2012079748W WO2013020495A1 WO 2013020495 A1 WO2013020495 A1 WO 2013020495A1 CN 2012079748 W CN2012079748 W CN 2012079748W WO 2013020495 A1 WO2013020495 A1 WO 2013020495A1
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WO
WIPO (PCT)
Prior art keywords
base station
user equipment
carrier
frequency
frequency information
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Application number
PCT/CN2012/079748
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English (en)
French (fr)
Inventor
时洁
蔺波
柴丽
张涛
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2013020495A1 publication Critical patent/WO2013020495A1/zh

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Classifications

    • 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
    • H04W36/0085—Hand-off measurements

Definitions

  • Base station switching method base station, user equipment and communication system
  • the present invention relates to the field of mobile communications technologies, and in particular, to a base station handover method, a base station, a user equipment, and a communication system. Background technique
  • LTE Long Term Evolution
  • a plurality of small base stations such as a pico base station (Pico) are placed in a coverage area of a Macro Home evolved Node B.
  • the heterogeneous deployment of these small base stations and macro base stations can effectively enhance network coverage and improve spectrum efficiency.
  • a plurality of small base stations may be arranged around a macro base station. These small transmission powers are small, and the coverage area generally only reaches the size of a home or office space.
  • a home base station as an example, as shown in FIG. 2, a heterogeneous network composed of a macro base station and a home base station, in order to clearly describe the interaction process between the user equipment and the home base station and the macro base station, other small base stations are not drawn, but In practical applications, there will be multiple small base stations in one macro area.
  • the serving base station is a user equipment of the macro base station close to a home base station
  • the macro base station needs to switch the user equipment to the home base station.
  • the user equipment uses the fingerprint printer to identify the current coverage of the home base station or the neighboring area, and the user equipment reports the frequency information of the carrier of the home base station to the macro base station, and the macro base station instructs the user equipment to measure the carrier of the home base station. Frequency, if the signal quality of the home base station measured by the user equipment is good, the macro base station will switch the user equipment to the home base station. Defects: With the development of wireless communication technology, the home base station can support multiple carriers.
  • the home base station can dynamically change the frequency of the currently working carrier to the frequency of other carriers.
  • the home base station can dynamically change the frequency of its own carrier.
  • the rate for example, from the frequency f2 operating at the carrier to the frequency f3 of the carrier, or from the operation at a single carrier frequency f2 to the frequencies f3 and f4 operating at the carrier, while the user equipment shown in Figure 2 reports to the macro base station
  • the frequency information of the carrier of the home base station is the frequency information of the carrier of the home base station recorded when the user equipment is once in the coverage of the home base station, and is recorded when the user equipment is once in the coverage of the home base station.
  • the frequency of the carrier of the home base station is f2.
  • the macro base station instructs the user equipment to measure the frequency f2 of the carrier of the home base station.
  • the user equipment is enabled to switch to the frequency f2 of the carrier of the home base station.
  • the frequency of the carrier of the home base station has been replaced since the last time the user equipment is in the coverage of the home base station, the user equipment cannot switch to the home because the user equipment cannot obtain the current true carrier frequency of the home base station.
  • the current true carrier frequency of the base station may cause the handover of the user equipment to fail.
  • the embodiments of the present invention provide a base station handover method, a base station, a user equipment, and a communication system, which are used to improve the success rate of user equipment handover.
  • a base station handover method implemented by the base station side includes: acquiring, by the first base station, frequency information of an available carrier of the second base station or frequency information of a carrier currently used by the second base station, where the available carrier
  • the frequency information is frequency information of all carriers that can be used by the second base station;
  • the first base station receives a proximity indication sent by the user equipment, where the proximity indication includes at least one of a first proximity indication, a second proximity indication, and a third proximity indication, where the first proximity indication includes the user equipment And indicating the frequency information of the carrier of the second base station; the second proximity indication includes the identifier information of the second base station or the closed subscriber group identifier CSGID; the third proximity indication includes the current location of the user equipment Location information;
  • the first base station sends a measurement configuration to the user equipment based on the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency indicated by the measurement configuration;
  • a base station handover method implemented by the user equipment side includes: When the user equipment approaches the second base station, the user equipment sends a proximity indication to the first base station that is serving the user equipment, where the proximity indication includes the first proximity indication, the second proximity indication, and the third proximity indication.
  • the first proximity indication includes frequency information of a carrier of the second base station indicated by the user equipment;
  • the second proximity indication includes identifier information of the second base station or a closed subscriber group identifier CSGID
  • the third proximity indication includes location information of a location where the user equipment is currently located;
  • a measurement configuration that is sent by the first base station according to the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency indicated by the measurement configuration;
  • the measurement configuration performs measurement at a frequency indicated by the measurement configuration to generate a measurement report;
  • the user equipment sends the measurement report to the first base station, where the measurement report is used by the first base station to determine whether to switch the user equipment from the first base station to the second base station.
  • Another base station handover method implemented by the base station side includes: the first base station transmitting frequency information of the available carrier of the first base station or frequency information of a carrier currently being used by the first base station to a user equipment, the frequency information of the available carrier is frequency information of all carriers that can be used by the first base station;
  • the second base station When the user equipment approaches the first base station, the second base station receives a proximity indication sent by the user equipment, where the proximity indication includes frequency information of an available carrier of the first base station or a carrier that is currently being used by the first base station. Frequency information, the second base station is a base station currently serving the user equipment;
  • the second base station sends a measurement configuration to the user equipment based on the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency indicated by the measurement configuration;
  • Another base station handover method implemented by the user equipment side includes: receiving, by the user equipment, frequency information of an available carrier of the first base station sent by the first base station or a carrier currently being used by the first base station Frequency information, the frequency information of the available carrier is frequency information of all carriers that can be used by the first base station;
  • the second base station sends a proximity indication, where the proximity indication includes frequency information of an available carrier of the first base station or frequency information of a carrier currently being used by the first base station;
  • a measurement configuration that is sent by the second base station according to the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency indicated by the measurement configuration;
  • the measurement configuration performs measurement at a frequency indicated by the measurement configuration to generate a measurement report;
  • the user equipment sends the measurement report to the second base station, where the measurement report is used by the second base station to determine whether to switch the user equipment from the second base station to the first base station.
  • An acquiring unit configured to acquire frequency information of an available carrier of the second base station or frequency information of a carrier currently used by the second base station, where frequency information of the available carrier is a frequency of all carriers that can be used by the second base station Information
  • a first receiving unit configured to receive a proximity indication sent by the user equipment, where the proximity indication includes at least one of a first proximity indication, a second proximity indication, and a third proximity indication, where the first proximity indication includes the The frequency information of the carrier of the second base station indicated by the user equipment; the second proximity indication includes the identification information of the second base station or the closed subscriber group identifier CSGID; the third proximity indication includes the current location of the user equipment Location information of the location;
  • an indication unit configured to send, by the first base station, a measurement configuration to the user equipment, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency of the measurement configuration indication;
  • a second receiving unit configured to receive, by the user equipment, a measurement report based on the measurement configuration, where the measurement report is used by the base station to determine whether to switch the user equipment from the first base station to the second Base station.
  • a first sending unit configured to: when the user equipment approaches the second base station, send a proximity indication to the first base station that is serving the user equipment, where the proximity indication includes a first proximity indication, a second proximity indication, and a third proximity At least one of the indications, wherein the first proximity indication includes frequency information of a carrier of the second base station indicated by the user equipment; the second proximity indication includes identifier information of the second base station or a closed user The group identification CSGID; the third proximity indication includes location information of a location where the user equipment is currently located; a receiving unit, configured to receive a measurement configuration that is sent by the first base station according to the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency indicated by the measurement configuration; Performing a measurement at a frequency indicated by the measurement configuration based on the measurement configuration, generating a measurement report;
  • a second sending unit configured to send the measurement report to the first base station, where the measurement report is used by the first base station to determine whether to switch the user equipment from the first base station to the second base station.
  • the first base station is configured to send the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment, where the frequency information of the available carrier is the Frequency information of all carriers that a base station can use;
  • the second base station includes a first receiving unit, an indicating unit, and a second indicating unit, where the second base station is a base station currently serving the user equipment;
  • the first receiving unit is configured to: when the user equipment approaches the first base station, receive a proximity indication sent by the user equipment, where the proximity indication includes frequency information of an available carrier of the first base station or the first base station Frequency information of a carrier currently being used, the second base station being a base station currently serving the user equipment;
  • an indication unit configured to send a measurement configuration to the user equipment, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency indicated by the measurement configuration;
  • a second receiving unit configured to receive, by the user equipment, a measurement report based on the measurement configuration, where the measurement report is used by the second base station to determine whether to switch the user equipment from the second base station to the First base station.
  • a first receiving unit configured to receive frequency information of an available carrier of the first base station sent by the first base station or frequency information of a carrier currently used by the first base station, where frequency information of the available carrier is the Frequency information of all carriers that a base station can use;
  • a first sending unit configured to: when the user equipment approaches the first base station, send a proximity indication to a second base station that is serving the user equipment, where the proximity indication includes frequency information or a location of an available carrier of the first base station Decoding the frequency information of the carrier currently being used by the first base station;
  • a second receiving unit configured to receive a measurement configuration that is sent by the second base station according to the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency indicated by the measurement configuration the amount;
  • a measuring unit configured to perform measurement at a frequency indicated by the measurement configuration based on the measurement configuration, and generate a measurement report
  • a second sending unit configured to send the measurement report to the second base station, where the measurement report is used by the second base station to determine whether to switch the user equipment from the second base station to the first base station.
  • the embodiments of the present invention have the following advantages:
  • the first base station can obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently used by the second base station, and after receiving the proximity indication sent by the user equipment, the first base station indicates the user.
  • the device performs measurement at a frequency of an available carrier of the second base station or at a frequency of a carrier currently used by the second base station, and the first base station receives a measurement configuration based on the measurement configuration fed back by the user equipment, so that the first base station can perform the measurement report according to the measurement Determining whether to switch the user equipment from the first base station to the second base station.
  • the first base station can obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently being used. After the first base station sends the measurement configuration to the user equipment, the user equipment can be the real carrier of the second base station. The measurement is performed at the frequency, so the success rate of the user equipment switching can be improved.
  • FIG. 1 is a schematic diagram of an LTE heterogeneous network in the prior art
  • FIG. 2 is a schematic diagram of a user equipment in the prior art that needs to be handed over to a home base station;
  • FIG. 3 is a schematic diagram of a base station handover method implemented by a base station side according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a base station handover method implemented on a user equipment side according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of another base station handover method implemented by a base station side according to an embodiment of the present invention.
  • FIG. 6 is another base station handover method implemented on the user equipment side according to an embodiment of the present invention Schematic diagram
  • FIG. 7 is a schematic diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another user equipment according to an embodiment of the present invention.
  • the embodiments of the present invention provide a base station handover method, a base station, a user equipment, and a communication system, which are used to improve the success rate of user equipment handover.
  • FIG. 3 a schematic diagram of a base station handover method implemented by a base station side according to an embodiment of the present invention is provided.
  • the method illustrated in FIG. 3 mainly includes:
  • the first base station acquires frequency information of an available carrier of the second base station or frequency information of a carrier currently used by the second base station.
  • the frequency information of the available carrier is frequency information of all carriers that can be used by the second base station.
  • the first base station and the second base station are only used to describe the two base stations.
  • the first base station and the second base station may respectively be one of the macro base station and the small base station in specific practical applications.
  • the small base station may be a home base station or a home base station with access rights, and the small base station may also be a pico base station (Pico), a home base station (HeNB), a femto base station (Femto eNB), a relay (Relay), etc. , here is not limited.
  • the frequency information of the available carriers of the second base station is the frequency information of all the carriers that can be used by the second base station, and the frequency information of the available carriers of the second base station may specifically be the frequency of one carrier or the frequency of multiple carriers.
  • the frequency information of the carrier currently used by the second base station is the frequency of the carrier on which the second base station is operating.
  • the second base station can dynamically change the frequency of the currently working carrier to the frequency of other carriers.
  • the first base station may obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently used by the second base station, and may be implemented in multiple manners, for example, the first base station is operated and maintained (OAM, Operation).
  • the system acquires frequency information of available carriers of the second base station or frequency information of carriers currently used by the second base station.
  • the first base station receives the frequency information of the available carrier of the second base station sent by the second base station or the frequency information of the carrier currently used by the second base station by using the OAM system.
  • the first base station obtains frequency information of the available carrier of the second base station or frequency information of the carrier currently used by the second base station by using an interface between the first base station and the second base station (for example, an X2 interface).
  • the OAM system is mainly used for analysis, prediction, planning, configuration, testing, and fault management of daily networks and services.
  • the first base station may acquire frequency information of the available carrier of the second base station or frequency information of the carrier currently used by the second base station, and the second base station may also use the frequency information of the available carrier or the carrier currently used.
  • the frequency information is sent to the first base station.
  • the first base station receives a proximity indication sent by the user equipment.
  • the proximity indication is for notifying the first base station that the user equipment is located near the second base station or is moving toward a location close to the second base station.
  • the proximity indication includes at least one of a first proximity indication, a second proximity indication, and a third proximity indication, where the first proximity indication includes frequency information of a carrier of the second base station indicated by the user equipment.
  • the second proximity indication includes the identification information of the second base station or the Closed Subscriber Group ID (CSG ID, Closed Subscriber Group ID), and the identification information may specifically be: Evolved Terrestrial Radio Access Network Global Cell Identity (ECGI, E-UTRAN Cell) Global Identifier) Physical Cell Identifier (PCI, Physical Cell Identifier).
  • the third proximity indication includes location information of the location where the user equipment is currently located.
  • the user equipment sends a proximity indication to the first base station, and the first base station can obtain the base station to which the user equipment may be handed over by using the proximity indication.
  • the proximity indication includes: at least one of a first proximity indication, a second proximity indication, and a third proximity indication, that is, the user equipment may send one of the first proximity indication, the second proximity indication, and the third proximity indication to the first base station or Two or all are sent to the first base station.
  • the user equipment may pre-set the content in the first proximity indication, the second proximity indication, and the third proximity indication to the first base station in a proximity indication, or may separately separate the indications in multiple directions. Reporting to the first base station is not limited herein.
  • the first base station sends a measurement configuration to the user equipment according to the proximity indication.
  • the measurement configuration is used to indicate that the user equipment performs the measurement at the frequency indicated by the measurement configuration.
  • the first base station after the first base station receives the proximity indication sent by the user equipment, the first base station sends a measurement configuration to the user equipment, indicating that the user equipment performs measurement at the frequency indicated by the measurement configuration, and may specifically indicate the user.
  • the device performs measurements at the frequency of the available carrier of the second base station or at the frequency of the carrier currently used by the second base station.
  • the first base station may specifically indicate that the user equipment performs measurement at the frequency of each available carrier of the second base station.
  • the first base station may also instruct the user equipment to perform measurements at the frequency of the carrier currently being used by the second base station.
  • the frequency information of the available carrier may specifically include: a frequency set of two or more available carriers.
  • the frequency information of the available carrier acquired by the first base station is a frequency set of two or more available carriers.
  • the first base station may send the measurement configuration to the user equipment based on the proximity indication, which may include:
  • the first base station searches for the frequency set of the available carriers to which the frequency indicated by the first proximity indication belongs, according to the frequency of the carrier indicated by the first proximity indication.
  • the first base station instructs the user equipment to perform measurement at each of the frequency sets of available carriers to which the frequency of the carrier indicated by the first proximity indication belongs.
  • the frequency information of the available carriers to which F1 belongs is found from the frequency information of the available carriers as F1 and F2.
  • the first base station instructs the user equipment to perform measurements at each of the frequency sets F1 and F2 of the available carriers (i.e., Fl, F2).
  • the preferred implementation may enable the first base station to indicate the user equipment when performing the measurement, for example, directly measuring the frequency sets F1 and F2 to which the F1 in the first proximity indication belongs, without requiring the frequency of all carriers of the second base station. (eg: Fl, F2, F3, F4) Perform measurements to improve measurement efficiency.
  • the frequency information of the available carrier may specifically include: a frequency set of two or more available carriers.
  • the frequency information of the available carrier acquired by the first base station is a frequency set of two or more available carriers.
  • the measurement configuration may specifically include:
  • the first base station searches for the identification information of the second base station indicated by the second proximity indication or the closed subscriber group identifier from the frequency information of the available carrier according to the identifier information of the second base station indicated by the second proximity indication or the closed subscriber group identifier.
  • a corresponding set of frequencies of available carriers are provided.
  • the first base station instructs the user equipment to perform measurement at each of the frequency sets of available carriers corresponding to the identification information of the second base station indicated by the second proximity indication or the closed subscriber group identity.
  • the second proximity indication includes the identification information of the second base station, and the second proximity indication includes the closed subscriber group identifier of the second base station, which is not only an example.
  • the second base station divides the frequencies of all available carriers (e.g., Fl, F2, F3, F4) into two sets according to the identification information (Ml, M2) of the second base station, respectively F1 and F2, F3 and F4.
  • the frequency set of the available carriers relative to M1 is searched for from the frequency information of the available carriers as F1 and F2.
  • the first base station instructs the user equipment to perform measurements at each of the frequency sets F1 and F2 of the available carriers (i.e., Fl, F2).
  • the preferred implementation manner may enable the first base station to indicate the user equipment to perform measurement, for example, directly measure the frequency sets F1 and F2 corresponding to M1 in the second proximity indication, without requiring all carriers of the second base station.
  • the frequency eg Fl, F2, F3, F4 performs measurements to improve measurement efficiency.
  • the first base station receives a measurement report based on the measurement configuration fed back by the user equipment, where the measurement report is used by the first base station to determine whether to switch the user equipment from the first base station to the second base station.
  • the first base station may receive the measurement report based on the measurement configuration fed back by the user equipment, so that the first base station can determine, according to the measurement report, whether to switch the user equipment from the first base station to the second base station.
  • the frequency information of the available carrier of the second base station may specifically refer to the frequency information of the available carriers of the cell of the second base station.
  • the frequency information of the carrier currently used by the second base station may specifically refer to the frequency information of the currently used carrier of the cell of the second base station.
  • the first base station can obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently used by the second base station, and receive the proximity indication sent by the user equipment. Afterwards, the first base station indicates that the user equipment performs measurement at the frequency of the available carrier of the second base station or at the frequency of the carrier currently used by the second base station, and the first base station receives the measurement report based on the measurement configuration fed back by the user equipment, so that The first base station can determine whether to switch the user equipment from the first base station to the second base station according to the measurement report. The first base station can obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently being used. After the first base station sends the measurement configuration to the user equipment, the user equipment can be the real carrier of the second base station. The measurement is performed at the frequency, so the success rate of the user equipment switching can be improved.
  • the embodiment shown in FIG. 3 describes a base station handover method according to an embodiment of the present invention from a base station side. Next, a base station handover method according to an embodiment of the present invention described in the user equipment side is described.
  • the methods shown mainly include:
  • the user equipment When the user equipment approaches the second base station, the user equipment sends a proximity indication to the first base station that is serving the user equipment.
  • the proximity indication is for notifying the first base station that the user equipment is located near the second base station or is moving toward a location close to the second base station.
  • the proximity indication includes at least one of a first proximity indication, a second proximity indication, and a third proximity indication, where the first proximity indication includes frequency information of a carrier of the second base station indicated by the user equipment.
  • the second proximity indication includes identification information of the second base station or a closed subscriber group identifier, such as ECGI, PCI, and the like.
  • the third proximity indication includes location information of the location where the user equipment is currently located.
  • the user equipment when the user equipment approaches the second base station, the user equipment sends a proximity indication to the first base station that is serving the user equipment.
  • the proximity indication may include: at least one of a first proximity indication, a second proximity indication, and a third proximity indication, that is, the user equipment may use one of the first proximity indication, the second proximity indication, and the third proximity indication to the first base station. Or two or all of them are sent to the first base station.
  • the user equipment may pre-set the content in the first proximity indication, the second proximity indication, and the third proximity indication to the first base station in a proximity indication, or may separately separate the indications in multiple directions. Reporting to the first base station is not limited herein.
  • the user equipment receives a measurement configuration that is sent by the first base station according to the proximity indication.
  • the measurement configuration is used to indicate that the user equipment performs the measurement at the frequency of the measurement configuration indication.
  • the first base station after the first base station receives the proximity indication sent by the user equipment, the first base station sends a measurement configuration to the user equipment, and the user equipment may receive the measurement configuration delivered by the first base station, where the first base station indicates the user.
  • the device is at the frequency of the available carrier of the second base station or is currently at the second base station The measurement is performed at the frequency of the carrier used.
  • the user equipment performs measurement at a frequency of the measurement configuration indication based on the measurement configuration, and generates a measurement report.
  • the user equipment after the user equipment receives the measurement configuration that is sent by the first base station, the user equipment performs measurement at the frequency of the measurement configuration indication according to the indication of the measurement configuration, and specifically, the user equipment is at the second base station. Measurements are performed at the frequency of the available carrier or at the frequency of the carrier currently being used by the second base station, generating a measurement report based on the measurement configuration. It is a prior art that the user equipment performs measurement on a certain carrier frequency and generates a measurement report, and details are not described herein again.
  • the user equipment sends a measurement report to the first base station, where the measurement report is used by the first base station to determine whether to switch the user equipment from the first base station to the second base station.
  • the user equipment after the user equipment performs measurement at a frequency of an available carrier of the second base station or at a frequency of a carrier currently used by the second base station, and generates a measurement report based on the measurement configuration, the user equipment sends the measurement information to the first base station.
  • the feedback is based on the measurement report of the measurement configuration to enable the first base station to determine whether to switch the user equipment from the first base station to the second base station according to the measurement report.
  • the frequency information of the available carrier of the second base station may specifically refer to the frequency information of the available carriers of the cell of the second base station.
  • the frequency information of the carrier currently used by the second base station may specifically refer to the frequency information of the currently used carrier of the cell of the second base station.
  • the proximity indication is sent to the first base station that is serving the user equipment.
  • the first base station indicates that the user equipment performs measurement at the frequency of the available carrier of the second base station or at the frequency of the carrier currently used by the second base station, and the user equipment performs measurement according to the indication of the first base station, generates a measurement report based on the measurement configuration and The measurement report is fed back to the first base station to enable the first base station to determine whether to switch the user equipment from the first base station to the second base station according to the measurement report.
  • the first base station can obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently being used.
  • the user equipment can be the real carrier of the second base station. The measurement is performed at the frequency, so the success rate of the user equipment switching can be improved.
  • the embodiment of the present invention further provides another base station handover method implemented by the base station side.
  • the base station handover method includes:
  • the first base station sends the frequency information of the available carrier of the first base station or the first base station is currently making The frequency information of the used carrier is sent to the user equipment.
  • the frequency information of the available carrier is frequency information of all carriers that can be used by the first base station.
  • the frequency information of the available carriers of the first base station is the frequency information of all the carriers that can be used by the first base station, and the frequency information of the available carriers of the first base station may specifically be the frequency of one carrier or the frequency of multiple carriers.
  • the frequency information of the carrier currently used by the first base station is the frequency of the carrier on which the first base station is operating. In order to avoid carrier interference of surrounding base stations, the first base station can dynamically change the frequency of the currently operating carrier to the frequency of other carriers.
  • the first base station may send the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment, for example, the first base station may be dedicated.
  • the signaling may send the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment, where the dedicated signaling may be: Radio Resource Control (RRC) signaling Or the medium access control control element (MAC CE), the first base station may also broadcast the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment.
  • RRC Radio Resource Control
  • MAC CE medium access control control element
  • the first base station may also broadcast the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment.
  • the broadcast is implemented by using various System Information Blocks, and the first base station can periodically broadcast the frequency information of its available carrier or the frequency information of the carrier currently being used.
  • the first base station determines whether the user equipment accesses the first base station for the first time, and if yes, the first base station performs
  • the first base station does not perform the operation of 501.
  • the meaning of the operation is that the first base station only sends the frequency information of the available carrier or the frequency information of the carrier currently used by the first base station to the user equipment that accesses the first base station for the first time, and when the user equipment is not the first connection When the first base station is entered, the first base station does not perform the operation of 501, which can save system resources.
  • the second base station receives the proximity indication sent by the user equipment.
  • the proximity indication is used to notify the second base station that the user equipment is located near the first base station or is moving toward a location close to the first base station.
  • the proximity indication includes frequency information of an available carrier of the first base station or frequency information of a carrier currently being used by the first base station, and the second base station is a base station currently serving the user equipment.
  • the user equipment sends a proximity indication to the second base station, and the second base station may acquire the frequency of the carrier of the base station to which the user equipment may be handed over.
  • the user equipment may preset the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the second base station in a proximity indication, or may be separated into multiple The manner of approaching the indication is reported to the second base station, which is not limited herein.
  • the second base station sends a measurement configuration to the user equipment according to the proximity indication.
  • the measurement configuration is used to indicate that the user equipment performs the measurement at the frequency of the measurement configuration indication.
  • the second base station after the second base station receives the proximity indication sent by the user equipment, the second base station sends a measurement configuration to the user equipment, indicating that the user equipment performs the measurement at the frequency of the measurement configuration indication, which may be specifically indicating the user equipment.
  • the measurement is performed at the frequency of the available carrier of the first base station or at the frequency of the carrier currently used by the first base station.
  • the second base station may specifically indicate that the user equipment performs measurement at the frequency of each available carrier of the first base station.
  • the second base station may also instruct the user equipment to perform measurements at the frequency of the carrier currently being used by the first base station.
  • the second base station receives a measurement report based on the measurement configuration fed back by the user equipment, where the measurement report is used by the second base station to determine whether to switch the user equipment from the second base station to the first base station.
  • the second base station may receive the measurement report based on the measurement configuration fed back by the user equipment, so that the second base station can determine, according to the measurement report, whether to switch the user equipment from the second base station to the first base station.
  • the frequency information of the available carrier of the first base station may specifically refer to the frequency information of the available carriers of the cell of the first base station.
  • the frequency information of the carrier currently used by the first base station may specifically refer to the frequency information of the currently used carrier of the cell of the first base station.
  • the first base station sends the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment.
  • the user equipment may The frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used is sent to the second base station that is serving the user equipment, and is available at the first base station according to the measurement configuration delivered by the second base station.
  • the measurement is performed at the frequency of the carrier or at the frequency of the carrier being used, since the user equipment is capable of performing measurements at the frequency of the real carrier of the first base station Quantity, so it can improve the success rate of user equipment switching.
  • the embodiment shown in FIG. 5 describes another base station handover method provided by the embodiment of the present invention from the base station side.
  • another base station handover method according to the embodiment of the present invention described on the user equipment side is introduced.
  • the method shown in 6 mainly includes:
  • the user equipment receives frequency information of an available carrier of the first base station sent by the first base station or frequency information of a carrier currently used by the first base station.
  • the frequency information of the available carrier is frequency information of all carriers that can be used by the first base station.
  • the frequency information of the available carriers of the first base station is the frequency information of all the carriers that can be used by the first base station, and the frequency information of the available carriers of the first base station may specifically be the frequency of one carrier or the frequency of multiple carriers.
  • the frequency information of the carrier currently used by the first base station is the frequency of the carrier on which the first base station is operating. In order to avoid carrier interference of surrounding base stations, the first base station can dynamically change the frequency of the currently operating carrier to the frequency of other carriers.
  • the user equipment may receive, by using dedicated signaling, frequency information of an available carrier of the first base station sent by the first base station or frequency information of a carrier currently being used by the first base station. Or, the user equipment receives the frequency information of the available carrier of the first base station or the frequency information of the carrier currently used by the first base station by using the broadcast information of the first base station.
  • the user equipment When the user equipment approaches the first base station, the user equipment sends a proximity indication to the second base station that is serving the user equipment.
  • the proximity indication is for notifying the second base station that the user equipment is located near the first base station or is moving toward a location close to the first base station.
  • the proximity indication includes frequency information of an available carrier of the first base station or frequency information of a carrier currently being used by the first base station.
  • the user equipment sends a proximity indication to the second base station, and the second base station can obtain the base station to which the user equipment may be handed over by using the proximity indication.
  • the user equipment may report the content in the proximity indication to the second base station in a proximity indication, or may report the information to the second base station in multiple proximity indications, which is not limited herein.
  • the user equipment receives a measurement configuration that is sent by the second base station according to the proximity indication.
  • the measurement configuration is used to indicate that the user equipment performs the measurement at the frequency of the measurement configuration indication.
  • the second base station after the second base station receives the proximity indication sent by the user equipment, the second base station sends a measurement configuration to the user equipment, and the user equipment receives the measurement configuration delivered by the second base station. 604.
  • the user equipment performs measurement at a frequency of the measurement configuration indication based on the measurement configuration, and generates a measurement report based on the measurement configuration.
  • the user equipment performs measurements at the frequency of the measurement configuration indication based on the measurement configuration, specifically performing measurements at the frequency of each of the available carriers of the first base station.
  • the user equipment can also perform measurements at the frequency of the carrier currently being used by the first base station. It is a prior art that the user equipment performs measurement at a certain carrier frequency and generates a measurement report, and details are not described herein again.
  • the user equipment sends a measurement report to the second base station, where the measurement report is used by the second base station to determine whether to switch the user equipment from the second base station to the first base station.
  • the frequency information of the available carrier of the first base station may specifically refer to the frequency information of the available carriers of the cell of the first base station.
  • the frequency information of the carrier currently used by the first base station may specifically refer to the frequency information of the currently used carrier of the cell of the first base station.
  • the proximity indication is sent to the second base station that is serving the user equipment.
  • the second base station indicates that the user equipment performs measurement at the frequency of the available carrier of the first base station or at the frequency of the carrier currently used by the first base station, and the user equipment performs measurement according to the indication of the second base station, and generates a measurement report based on the measurement configuration and The measurement report is fed back to the second base station to enable the second base station to determine whether to switch the user equipment from the second base station to the first base station according to the measurement report.
  • the user equipment can receive the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used, after the second station sends the measurement configuration to the user equipment, the user equipment can be in the real carrier of the first base station. Measurements are performed at the frequency, so the success rate of user equipment switching can be improved.
  • the base station 700 includes: an acquiring unit 701, configured to acquire frequency information of an available carrier of the second base station or frequency information of a carrier currently used by the second base station, where frequency information of the available carrier is second. Frequency information of all carriers that the base station can use.
  • the first receiving unit 702 is configured to receive a proximity indication sent by the user equipment, where the proximity indication includes at least one of a first proximity indication, a second proximity indication, and a third proximity indication, where the first proximity indication includes a Frequency information of the carrier of the two base stations; the second proximity indication includes the second base The identification information of the station or the closed user group identifier; the third proximity indication includes location information of the current location of the user equipment.
  • the indicating unit 703 is configured to send, by the first base station, a measurement configuration to the user equipment according to the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency of the measurement configuration indication.
  • the second receiving unit 704 is configured to receive a measurement report based on the measurement configuration fed back by the user equipment, where the measurement report is used by the base station 700 to determine whether to switch the user equipment from the first base station to the second base station.
  • the obtaining unit 701 is configured to obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently used by the second base station by using the operation management and maintenance system. Or, the obtaining unit 701 is specifically configured to receive, by using the OAM system, frequency information of an available carrier of the second base station sent by the second base station or frequency information of a carrier currently used by the second base station. Or the obtaining unit 701 is specifically configured to obtain, by using an interface between the first base station and the second base station, frequency information of an available carrier of the second base station or frequency information of a carrier currently used by the second base station.
  • an implementation manner of the indication unit 703 is that the indication unit 703 is specifically configured to instruct the user equipment to perform measurement at the frequency of each available carrier of the second base station. Or, the indicating unit 703 is specifically configured to instruct the user equipment to perform measurement at a frequency of a carrier currently used by the second base station.
  • the frequency of the available carrier includes: a frequency set of two or more available carriers, and when the proximity indication includes the first proximity indication, the indicating unit 703 includes:
  • a first searching module configured to search, according to a frequency of the carrier indicated by the first proximity indication, a frequency set of available carriers to which a frequency indicated by the first proximity indication belongs to the frequency information of the available carrier;
  • a first indication module configured to instruct the user equipment to perform measurement at each of a frequency set of available carriers to which the frequency of the carrier indicated by the first proximity indication belongs.
  • the indicator unit 703 is configured to: the frequency information of the available carrier includes: a frequency set of two or more available carriers, and when the proximity indication includes the second proximity indication, the indicating unit 703 includes:
  • a second searching module configured to search, according to the identifier information of the second base station or the closed subscriber group identifier indicated by the second proximity indication, the identifier information of the second base station indicated by the second proximity indication from the frequency information of the available carrier or Closing the frequency set of available carriers corresponding to the user group identifier;
  • a second indication module configured to instruct the user equipment to perform measurement at each of a frequency set of available carriers corresponding to the identification information of the second base station indicated by the second proximity indication or the closed subscriber group identifier.
  • the base station 700 shown in FIG. 7 is the first base station in the method embodiment of FIG.
  • the first base station can obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently used by the second base station, and after receiving the proximity indication sent by the user equipment, the first base station indicates the user.
  • the device performs measurement at a frequency of an available carrier of the second base station or at a frequency of a carrier currently used by the second base station, and the first base station receives a measurement configuration based on the measurement configuration fed back by the user equipment, so that the first base station can perform the measurement report according to the measurement Determining whether to switch the user equipment from the first base station to the second base station.
  • the first base station can obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently being used. After the first base station sends the measurement configuration to the user equipment, the user equipment can be the real carrier of the second base station. The measurement is performed at the frequency, so the success rate of the user equipment switching can be improved.
  • a user equipment 800 includes:
  • the first sending unit 801 is configured to: when the user equipment approaches the second base station, send a proximity indication to the first base station that is serving the user equipment, where the proximity indication includes the first proximity indication, the second proximity indication, and the third proximity indication At least one, wherein the first proximity indication includes frequency information of a carrier of the second base station indicated by the user equipment; the second proximity indication includes identification information of the second base station or a closed user group identifier; and the third proximity indication includes that the user equipment is currently located Location location information.
  • the receiving unit 802 is configured to receive a measurement configuration that is sent by the first base station according to the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency of the measurement configuration indication.
  • the measuring unit 803 is configured to perform measurement at a frequency of the measurement configuration indication based on the measurement configuration, and generate a measurement report based on the measurement configuration.
  • the second sending unit 804 is configured to send a measurement report to the first base station, where the measurement report is used by the first base station to determine whether to switch the user equipment from the first base station to the second base station. It should be noted that the information interaction, the execution process, and the like between the modules/units of the foregoing device are the same as the embodiment of the method of the present invention. Referring to the description of the method embodiment shown in FIG. 4, the details are not described herein again.
  • the proximity indication is sent to the first base station that is serving the user equipment.
  • the first base station indicates that the user equipment performs measurement at the frequency of the available carrier of the second base station or at the frequency of the carrier currently used by the second base station, and the user equipment performs measurement according to the indication of the first base station, generates a measurement report based on the measurement configuration and The measurement report is fed back to the first base station to enable the first base station to determine whether to switch the user equipment from the first base station to the second base station according to the measurement report.
  • the first base station can obtain the frequency information of the available carrier of the second base station or the frequency information of the carrier currently being used.
  • the user equipment can be the real carrier of the second base station. The measurement is performed at the frequency, so the success rate of the user equipment switching can be improved.
  • the embodiment of the present invention further provides a communication system 900, including: a first base station 901 and a second base station 902, where
  • the first base station 901 is configured to send the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment, where the frequency information of the available carrier is the frequency of all carriers that can be used by the first base station.
  • the second base station 902 includes a first receiving unit 9021, an indicating unit 9022, and a second indicating unit 9023, and the second base station 902 is a base station currently serving the user equipment;
  • the first receiving unit 9021 is configured to: when the user equipment approaches the first base station, receive a proximity indication sent by the user equipment, where the proximity indication includes frequency information of the available carrier of the first base station 901 or a frequency of a carrier currently used by the first base station 901 information.
  • the indicating unit 9022 is configured to send a measurement configuration to the user equipment based on the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency of the measurement configuration indication;
  • the second receiving unit 9023 is configured to receive a measurement configuration based on the measurement configuration fed back by the user equipment, where the measurement report is used by the second base station 902 to determine whether to switch the user equipment from the second base station to the first base station.
  • a realistic manner of the first base station 901 is that the first base station 901 is specifically configured to use frequency information of the available carrier of the first base station or the first base station by using dedicated signaling.
  • the frequency information of the used carrier is sent to the user equipment.
  • the first base station 901 specifically broadcasts the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment.
  • the first base station sends the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used by the first base station to the user equipment.
  • the user equipment may The frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used is sent to the second base station that is serving the user equipment, and is available at the first base station according to the measurement configuration delivered by the second base station.
  • the measurement is performed at the frequency of the carrier or at the frequency of the carrier being used, and since the user equipment can perform the measurement at the frequency of the real carrier of the first base station, the success rate of the user equipment handover can be improved.
  • the embodiment of the present invention further provides another user equipment 1000, including: a first receiving unit 1001, configured to receive frequency information of an available carrier of a first base station sent by a first base station, or current Frequency information of the carrier being used, the frequency information of the available carrier is frequency information of all carriers that can be used by the first base station;
  • the first sending unit 1002 is configured to: when the user equipment approaches the first base station, send a proximity indication to the second base station that is serving the user equipment, where the proximity indication includes frequency information of the available carrier of the first base station or the first base station is currently using Frequency information of the carrier;
  • the second receiving unit 1003 is configured to receive a measurement configuration that is sent by the second base station according to the proximity indication, where the measurement configuration is used to indicate that the user equipment performs measurement at a frequency of the measurement configuration indication;
  • the measuring unit 1004 is configured to perform measurement at a frequency of the measurement configuration indication based on the measurement configuration, and generate a measurement report based on the measurement configuration;
  • the second sending unit 1005 is configured to send a measurement report to the second base station, where the measurement report is used by the second base station to determine whether to switch the user equipment from the second base station to the first base station.
  • the first receiving unit 1001 is configured to receive, by using dedicated signaling, frequency information of the available carrier of the first base station and the first base station sent by the first base station by using dedicated signaling.
  • the first receiving unit 1001 Specifically, it is used to receive, by using broadcast information of the first base station, frequency information of an available carrier of the first base station sent by the first base station or frequency information of a carrier currently being used by the first base station.
  • the proximity indication is sent to the second base station that is serving the user equipment.
  • the second base station indicates that the user equipment performs measurement at the frequency of the available carrier of the first base station or at the frequency of the carrier currently used by the first base station, and the user equipment performs measurement according to the indication of the second base station, and generates a measurement report based on the measurement configuration and The measurement report is fed back to the second base station to enable the second base station to determine whether to switch the user equipment from the second base station to the first base station according to the measurement report.
  • the user equipment can receive the frequency information of the available carrier of the first base station or the frequency information of the carrier currently being used, after the second station sends the measurement configuration to the user equipment, the user equipment can be in the real carrier of the first base station. Measurements are performed at the frequency, so the success rate of user equipment switching can be improved.
  • the medium can be a read only memory, a magnetic disk or a compact disk or the like.

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Abstract

本发明实施例公开了一种基站切换方法、基站、用户设备和通信系统，用于提高用户设备切换的成功率。本发明实施例方法包括：第一基站获取第二基站的可用载波的频率信息或第二基站当前使用的载波的频率信息，可用载波的频率信息为第二基站能够使用的所有的载波的频率信息；第一基站接收用户设备发送的接近指示，接近指示包括第一接近指示、第二接近指示、第三接近指示中的至少一个；第一基站基于接近指示向用户设备下发测量配置，测量配置用于指示用户设备在测量配置指示的频率处执行测量；第一基站接收用户设备反馈的基于测量配置的测量报告，测量报告被第一基站用于判断是否将用户设备从第一基站切换到第二基站。

Description

一种基站切换方法、 基站、 用户设备和通信系统
技术领域
本发明涉及移动通信技术领域， 尤其涉及一种基站切换方法、基站、 用户 设备和通信系统。 背景技术
在长期演进系统（ LTE, Long Term Evolution )异构网络中， 如图 1所示， 在宏基站（ Macro Home evolved Node B )覆盖范围内放置有多个小型基站， 例 如微微蜂窝基站（ Pico )、 家庭基站（ HeNB, Home eNB )、 毫微微基站（ Femto eNB ), 中继 （Relay )等， 这些小型基站可以采用有线或无线方式接入网络， 用户设备（UE, User Equipment )处于宏基站和小型基站的双重覆盖下， 整个 通信系统较以往传统的 LTE宏基站网络具有更高的容量。 在办公楼宇、 商场、 校园网等场景下， 利用这些小型基站和宏基站的异构部署， 可以有效的增强网 络覆盖， 提升频谱效率。
在 LTE异构网络下， 一个宏基站周围可能布置有多个小型基站， 这些小 型发射功率小，覆盖面积一般只能达到家庭或办公场所的面积大小。 以家庭基 站为例， 如图 2所示， 为宏基站和家庭基站构成的异构网络， 为了清晰描述用 户设备和家庭基站、 宏基站之间的交互过程， 没有画出其它的小型基站， 但是 在实际应用中一个宏区域内会存在多个小型基站。当服务基站为宏基站的用户 设备靠近一个家庭基站时， 为了提升通信系统的吞吐量、 减轻宏基站的负荷， 宏基站需要将用户设备切换到家庭基站。 用户设备利用指纹功能 （finger printer )识别出当前处于家庭基站的覆盖范围内或邻近区域， 并且用户设备将 家庭基站的载波的频率信息报告给宏基站，由宏基站指示用户设备测量家庭基 站的载波的频率，若用户设备测量的家庭基站信号质量较好， 则宏基站会将用 户设备切换到家庭基站。 缺陷： 随着无线通信技术的发展， 家庭基站可以支持多个载波， 为了能够避免 周围小型基站的载波干扰，家庭基站可以将目前工作的载波的频率动态的更换 到其它的载波的频率。如图 2所示， 家庭基站可以动态的更换自身的载波的频 率， 例如从工作在载波的频率 f2选择到载波的频率 f3, 或者从工作在单个载 频 f2更换到工作在载波的频率 f3和 f4上，而图 2中所示的用户设备向宏基站 报告的家庭基站的载波的频率信息是用户设备上一次处于该家庭基站的覆盖 范围内时记录的该家庭基站的载波的频率信息，假设用户设备上一次处于该家 庭基站的覆盖范围内时记录的该家庭基站的载波的频率为 f2,当用户设备将该 家庭基站的载波的频率 f2报告给宏基站时， 根据现有技术， 宏基站将指示用 户设备去测量该家庭基站的载波的频率 f2,以使用户设备能够切换到该家庭基 站的载波的频率 f2。但是，此时若家庭基站的载波的频率自从上一次用户设备 处于该家庭基站的覆盖范围之后发生了更换，用户设备由于无法获得家庭基站 目前真实的载波的频率，用户设备就无法切换到该家庭基站目前真实的载波的 频率， 会导致用户设备的切换失败。 发明内容
本发明实施例提供了一种基站切换方法、基站、 用户设备和通信系统， 用 于提高用户设备切换的成功率。
本发明实施例提供的基于基站侧实现的一种基站切换方法包括： 第一基站获取第二基站的可用载波的频率信息或所述第二基站当前使用 的载波的频率信息，所述可用载波的频率信息为所述第二基站能够使用的所有 的载波的频率信息；
所述第一基站接收用户设备发送的接近指示，所述接近指示包括第一接近 指示、 第二接近指示、 第三接近指示中的至少一个， 其中， 所述第一接近指示 包括所述用户设备指示的所述第二基站的载波的频率信息；所述第二接近指示 包括所述第二基站的标识信息或封闭用户组标识 CSGID; 所述第三接近指示 包括所述用户设备当前所处位置的位置信息；
所述第一基站基于所述接近指示向所述用户设备下发测量配置，所述测量 配置用于指示所述用户设备在所述测量配置指示的频率处执行测量；
所述第一基站接收所述用户设备反馈的基于所述测量配置的测量报告，所 述测量报告被所述第一基站用于判断是否将所述用户设备从第一基站切换到 所述第二基站。
本发明实施例提供的基于用户设备侧实现的一种基站切换方法包括： 当用户设备接近第二基站时，所述用户设备向正在为所述用户设备服务的 第一基站发送接近指示， 所述接近指示包括第一接近指示、 第二接近指示、 第 三接近指示中的至少一个， 其中，所述第一接近指示包括所述用户设备指示的 所述第二基站的载波的频率信息；所述第二接近指示包括所述第二基站的标识 信息或封闭用户组标识 CSGID; 所述第三接近指示包括所述用户设备当前所 处位置的位置信息；
所述用户设备接收所述第一基站基于所述接近指示下发的测量配置，所述 测量配置用于指示所述用户设备在所述测量配置指示的频率处执行测量； 所述用户设备基于所述测量配置在所述测量配置指示的频率处执行测量， 生成测量报告；
所述用户设备向所述第一基站发送所述测量报告，所述测量报告被所述第 一基站用于判断是否将所述用户设备从第一基站切换到所述第二基站。
本发明实施例提供的基于基站侧实现的另一种基站切换方法包括： 第一基站将所述第一基站的可用载波的频率信息或所述第一基站当前正 在使用的载波的频率信息发送给用户设备，所述可用载波的频率信息为所述第 一基站能够使用的所有的载波的频率信息；
当用户设备接近第一基站时， 第二基站接收所述用户设备发送的接近指 示，所述接近指示包括所述第一基站的可用载波的频率信息或所述第一基站当 前正在使用的载波的频率信息，所述第二基站为当前正在为所述用户设备服务 的基站；
所述第二基站基于所述接近指示向所述用户设备下发测量配置，所述测量 配置用于指示所述用户设备在所述测量配置指示的频率处执行测量；
所述第二基站接收所述用户设备反馈的基于所述测量配置的测量报告，所 述测量报告被所述第二基站用于判断是否将所述用户设备从第二基站切换到 所述第一基站。
本发明实施例提供的基于用户设备侧实现的另一种基站切换方法包括： 用户设备接收第一基站发送的所述第一基站的可用载波的频率信息或所 述第一基站当前正在使用的载波的频率信息，所述可用载波的频率信息为所述 第一基站能够使用的所有的载波的频率信息；
当用户设备接近第一基站时，所述用户设备向正在为所述用户设备服务的 第二基站发送接近指示，所述接近指示包括所述第一基站的可用载波的频率信 息或所述第一基站当前正在使用的载波的频率信息；
所述用户设备接收所述第二基站基于所述接近指示下发的测量配置，所述 测量配置用于指示所述用户设备在所述测量配置指示的频率处执行测量； 所述用户设备基于所述测量配置在所述测量配置指示的频率处执行测量， 生成测量报告；
所述用户设备向所述第二基站发送所述测量报告，所述测量报告被所述第 二基站用于判断是否将所述用户设备从第二基站切换到所述第一基站。
本发明实施例提供的一种基站包括：
获取单元，用于获取第二基站的可用载波的频率信息或所述第二基站当前 使用的载波的频率信息，所述可用载波的频率信息为所述第二基站能够使用的 所有的载波的频率信息；
第一接收单元， 用于接收用户设备发送的接近指示， 所述接近指示包括第 一接近指示、 第二接近指示、 第三接近指示中的至少一个， 其中， 所述第一接 近指示包括所述用户设备指示的所述第二基站的载波的频率信息；所述第二接 近指示包括所述第二基站的标识信息或封闭用户组标识 CSGID; 所述第三接 近指示包括所述用户设备当前所处位置的位置信息；
指示单元，用于所述第一基站基于所述接近指示向所述用户设备下发测量 配置， 所述测量配置用于指示所述用户设备在测量配置指示的频率处执行测 量；
第二接收单元，用于接收所述用户设备反馈的基于所述测量配置的测量报 告，所述测量报告被所述基站用于判断是否将所述用户设备从第一基站切换到 所述第二基站。
本发明实施例提供的一种用户设备包括：
第一发送单元， 用于当用户设备接近第二基站时， 向正在为所述用户设备 服务的第一基站发送接近指示， 所述接近指示包括第一接近指示、第二接近指 示、 第三接近指示中的至少一个， 其中， 所述第一接近指示包括所述用户设备 指示的所述第二基站的载波的频率信息；所述第二接近指示包括所述第二基站 的标识信息或封闭用户组标识 CSGID; 所述第三接近指示包括所述用户设备 当前所处位置的位置信息； 接收单元， 用于接收所述第一基站基于所述接近指示下发的测量配置， 所 述测量配置用于指示所述用户设备在所述测量配置指示的频率处执行测量； 测量单元， 用于基于所述测量配置在所述测量配置指示的频率处执行测 量， 生成测量报告；
第二发送单元， 用于向所述第一基站发送所述测量报告， 所述测量报告被 所述第一基站用于判断是否将所述用户设备从第一基站切换到所述第二基站。
本发明实施例提供的一种通信系统包括：
所述第一基站，用于将所述第一基站的可用载波的频率信息或所述第一基 站当前正在使用的载波的频率信息发送给用户设备，所述可用载波的频率信息 为所述第一基站能够使用的所有的载波的频率信息；
所述第二基站包括第一接收单元、 指示单元、 第二指示单元， 所述第二基 站为当前正在为所述用户设备服务的基站；
所述第一接收单元， 用于当用户设备接近第一基站时，接收所述用户设备 发送的接近指示，所述接近指示包括所述第一基站的可用载波的频率信息或所 述第一基站当前正在使用的载波的频率信息，所述第二基站为当前正在为所述 用户设备服务的基站；
指示单元， 用于基于所述接近指示向所述用户设备下发测量配置， 所述测 量配置用于指示所述用户设备在所述测量配置指示的频率处执行测量；
第二接收单元，用于接收所述用户设备反馈的基于所述测量配置的测量报 告，所述测量报告被所述第二基站用于判断是否将所述用户设备从第二基站切 换到所述第一基站。
本发明实施例提供的另一种用户设备包括：
第一接收单元，用于接收第一基站发送的所述第一基站的可用载波的频率 信息或所述第一基站当前正在使用的载波的频率信息，所述可用载波的频率信 息为所述第一基站能够使用的所有的载波的频率信息；
第一发送单元， 用于当用户设备接近第一基站时， 向正在为所述用户设备 服务的第二基站发送接近指示，所述接近指示包括所述第一基站的可用载波的 频率信息或所述第一基站当前正在使用的载波的频率信息；
第二接收单元， 用于接收所述第二基站基于所述接近指示下发的测量配 置，所述测量配置用于指示所述用户设备在所述测量配置指示的频率处执行测 量；
测量单元， 用于基于所述测量配置在所述测量配置指示的频率处执行测 量， 生成测量报告；
第二发送单元， 用于向所述第二基站发送所述测量报告， 所述测量报告被 所述第二基站用于判断是否将所述用户设备从第二基站切换到所述第一基站。
从以上技术方案可以看出， 本发明实施例具有以下优点：
在本发明实施例中 ,第一基站能够获取到第二基站的可用载波的频率信息 或第二基站当前使用的载波的频率信息， 当接收到用户设备发送的接近指示 后，第一基站指示用户设备在第二基站的可用载波的频率处或在第二基站当前 使用的载波的频率处执行测量，第一基站接收用户设备反馈的基于测量配置的 测量报告，以使第一基站能够根据测量报告判断是否将用户设备从第一基站切 换到第二基站。由于第一基站能够获取到第二基站的可用载波的频率信息或当 前正在使用的载波的频率信息， 当第一基站向用户设备下发测量配置后， 用户 设备能够在第二基站的真实的载波的频率处执行测量，所以能够提高用户设备 切换的成功率。 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所 需要使用的附图作筒单地介绍，显而易见地， 下面描述中的附图仅仅是本发明 的一些实施例，对于本领域的技术人员来讲，还可以根据这些附图获得其他的 附图。
图 1为现有技术中的 LTE异构网络的示意图；
图 2为现有技术中的用户设备需要切换到家庭基站的示意图；
图 3 为本发明实施例提供的基于基站侧实现的一种基站切换方法的示意 图；
图 4 为本发明实施例提供的基于用户设备侧实现的一种基站切换方法的 示意图；
图 5 为本发明实施例提供的基于基站侧实现的另一种基站切换方法的示 意图；
图 6 为本发明实施例提供的基于用户设备侧实现的另一种基站切换方法 的示意图；
图 7为本发明实施例提供的一种基站的示意图；
图 8为本发明实施例提供的一种用户设备的示意图；
图 9为本发明实施例提供的一种通信系统的示意图；
图 10为本发明实施例提供的另一种用户设备的示意图。
具体实施方式
本发明实施例提供了一种基站切换方法、基站、 用户设备和通信系统， 用 于提高用户设备切换的成功率。
为使得本发明的发明目的、 特征、优点能够更加的明显和易懂， 下面将结 合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、 完整地描 述，显然，下面所描述的实施例仅仅是本发明一部分实施例，而非全部实施例。 基于本发明中的实施例， 本领域的技术人员所获得的所有其他实施例，都属于 本发明保护的范围。
请参阅图 3 , 本发明实施例提供的基于基站侧实现的一种基站切换方法示 意图， 图 3示例的方法主要包括：
301、 第一基站获取第二基站的可用载波的频率信息或第二基站当前使用 的载波的频率信息。
其中， 可用载波的频率信息为第二基站能够使用的所有的载波的频率信 息。
在本发明实施例中，第一基站和第二基站只是为了区别描述两个基站而采 用的描述方式，第一基站和第二基站在具体实际应用中分别可以是宏基站和小 型基站中的一种， 小型基站可以具体为家庭基站或者具有接入权限的家庭基 站， 小型基站还可以为微微蜂窝基站（Pico )、 家庭基站（HeNB )、 毫微微基 站（ Femto eNB )、 中继 （ Relay )等， 此处不作限定。
需要说明的是，第二基站的可用载波的频率信息为第二基站能够使用的所 有的载波的频率信息，第二基站的可用载波的频率信息具体可以为一个载波的 频率或多个载波的频率。第二基站当前使用的载波的频率信息为第二基站正工 作在的载波的频率。 为了能够避免周围基站的载波干扰， 第二基站可以将目前 工作的载波的频率动态的更换到其它的载波的频率。 在实际应用中，第一基站获取第二基站的可用载波的频率信息或第二基站 当前使用的载波的频率信息具体可以有多种实现方式，例如： 第一基站通过操 作管理维护 （ OAM, Operation Administration and Maintenance ) 系统获取到第 二基站的可用载波的频率信息或第二基站当前使用的载波的频率信息。或， 第 一基站通过 OAM系统接收第二基站发送的第二基站的可用载波的频率信息或 第二基站当前使用的载波的频率信息。或， 第一基站通过第一基站和第二基站 之间的接口 （例如 X2接口）获得第二基站的可用载波的频率信息或第二基站 当前使用的载波的频率信息。 其中， OAM系统主要用于对日常网络和业务进 行的分析、 预测、 规划、 配置、 测试和故障管理等。 在 OAM系统中， 第一基 站可以获取第二基站的可用载波的频率信息或第二基站当前使用的载波的频 率信息，第二基站也可以将自身的可用载波的频率信息或当前使用的载波的频 率信息发送给第一基站。
302、 第一基站接收用户设备发送的接近指示。
该接近指示用于向第一基站通知该用户设备位于接近所述第二基站的位 置或正在向接近所述第二基站的位置移动。其中，接近指示包括第一接近指示、 第二接近指示、 第三接近指示中的至少一个， 其中， 第一接近指示包括用户设 备指示的第二基站的载波的频率信息。第二接近指示包括第二基站的标识信息 或封闭用户组标识（ CSG ID, Closed Subscriber Group ID ), 标识信息具体可 以为： 演进型陆地无线接入网全球小区识别码（ECGI, E-UTRAN Cell Global Identifier )物理小区标识（ PCI, Physical Cell Identifier )等。 第三接近指示包括 用户设备当前所处位置的位置信息。
在本发明实施例中，通过用户设备向第一基站发送接近指示， 第一基站通 过该接近指示可以获取到用户设备可能切换到的基站。接近指示包括： 第一接 近指示、 第二接近指示、 第三接近指示中的至少一个， 即用户设备向第一基站 可以将第一接近指示、第二接近指示、第三接近指示中的一个或两个或全部发 送给第一基站。在实际应用中，用户设备可以将第一接近指示、第二接近指示、 第三接近指示中的内容都预置在一个接近指示中向第一基站上报，也可以分开 以多个接近指示的方式向第一基站上报， 此处不作限定。
303、 第一基站基于接近指示向用户设备下发测量配置。
其中， 测量配置用于指示用户设备在测量配置所指示的频率处执行测量。 在本发明实施例中， 第一基站接收到用户设备发送的接近指示之后， 第一 基站向用户设备下发测量配置，指示用户设备在测量配置所指示的频率处执行 测量，具体可以为指示用户设备在第二基站的可用载波的频率处或在第二基站 当前使用的载波的频率处执行测量。在实际应用中， 第一基站具体可以指示用 户设备在第二基站的每一个可用载波的频率处都执行测量。第一基站也可以指 示用户设备在第二基站当前使用的载波的频率处执行测量。
在实际应用中， 一种优选的实现方式是， 可用载波的频率信息具体可以包 括： 两个以上的可用载波的频率集合。 第一基站获取第二基站的可用载波的频 率信息时，第一基站获取到的该可用载波的频率信息为两个以上的可用载波的 频率集合。
当接近指示包括第一接近指示时，第一基站基于接近指示向用户设备下发 测量配置具体可以包括：
第一基站根据第一接近指示所指示的载波的频率，从可用载波的频率信息 中查找第一接近指示所指示的载波的频率属于的可用载波的频率集合。
第一基站指示用户设备在第一接近指示所指示的载波的频率属于的可用 载波的频率集合中的每一个频率处执行测量。
举例说明： 第二基站将自身所有的可用载波的频率 （如： Fl、 F2、 F3、 F4 )分成两个集合分另1 J为 F1和 F2, F3和 F4。
假如用户设备向第一基站上报的第一接近指示包括的载波的频率为 F1 , 从可用载波的频率信息中查找 F1属于的可用载波的频率集合为 F1和 F2。 第 一基站指示用户设备在可用载波的频率集合 F1和 F2中的每一个频率（即 Fl、 F2 )处执行测量。
该优选实现方式可以使第一基站在指示用户设备执行测量时的针对性，例 如直接测量第一接近指示中的 F1属于的频率集合 F1和 F2, 而不需要对第二 基站的所有载波的频率（如： Fl、 F2、 F3、 F4 )执行测量， 提高测量效率。
在实际应用中， 另一种优选的实现方式是， 可用载波的频率信息具体可以 包括： 两个以上的可用载波的频率集合。 第一基站获取第二基站的可用载波的 频率信息时，第一基站获取到的该可用载波的频率信息为两个以上的可用载波 的频率集合。
当接近指示包括第二接近指示时，第一基站基于接近指示向用户设备下发 测量配置具体可以包括：
第一基站根据第二接近指示所指示的第二基站的标识信息或封闭用户组 标识，从可用载波的频率信息中查找与第二接近指示所指示的第二基站的标识 信息或封闭用户组标识相对应的可用载波的频率集合。
第一基站指示用户设备在与第二接近指示所指示的第二基站的标识信息 或封闭用户组标识相对应的可用载波的频率集合中的每一个频率处执行测量。
举例说明： 以第二接近指示包括第二基站的标识信息为例说明， 第二接近 指示包括第二基站的封闭用户组标识也相似， 此不仅以其一举例。 第二基站将 自身所有的可用载波的频率 （如： Fl、 F2、 F3、 F4 )按照第二基站的标识信 息（Ml、 M2 )分成两个集合分别为 F1和 F2, F3和 F4。
假如用户设备向第一基站上报的第二接近指示包括的标识信息 Ml , 从可 用载波的频率信息中查找与 Ml相对于的可用载波的频率集合为 F1和 F2。 第 一基站指示用户设备在可用载波的频率集合 F1和 F2中的每一个频率（即 Fl、 F2 )处执行测量。
该优选实现方式可以使第一基站在指示用户设备执行测量时的针对性，例 如直接测量第二接近指示中的 Ml相对应的频率集合 F1和 F2, 而不需要对第 二基站的所有载波的频率（如： Fl、 F2、 F3、 F4 )执行测量， 提高测量效率。
304、 第一基站接收用户设备反馈的基于测量配置的测量报告， 测量报告 被第一基站用于判断是否将用户设备从第一基站切换到第二基站。
在本发明实施例中， 第一基站向用户设备下发测量配置之后， 用户设备将 在第二基站的可用载波的频率处或在第二基站当前使用的载波的频率处执行 测量， 并生成基于该测量配置的测量报告， 则第一基站可以接收到用户设备反 馈的基于该测量配置的测量报告，以使第一基站能够根据该测量报告判断是否 将用户设备从第一基站切换到第二基站。
需要说明的是，在如图 3所示的实施例中， 第二基站的可用载波的频率信 息具体可以指的是第二基站的小区的可用载波的频率信息。第二基站当前使用 的载波的频率信息具体可以指的是第二基站的小区的当前使用的载波的频率 信息。
在本发明实施例中 ,第一基站能够获取到第二基站的可用载波的频率信息 或第二基站当前使用的载波的频率信息， 当接收到用户设备发送的接近指示 后，第一基站指示用户设备在第二基站的可用载波的频率处或在第二基站当前 使用的载波的频率处执行测量，第一基站接收用户设备反馈的基于测量配置的 测量报告，以使第一基站能够根据测量报告判断是否将用户设备从第一基站切 换到第二基站。由于第一基站能够获取到第二基站的可用载波的频率信息或当 前正在使用的载波的频率信息， 当第一基站向用户设备下发测量配置后， 用户 设备能够在第二基站的真实的载波的频率处执行测量，所以能够提高用户设备 切换的成功率。
图 3 所示的实施例从基站侧描述了本发明实施例提供的一种基站切换方 法， 接下来介绍从用户设备侧描述的本发明实施例提供的一种基站切换方法， 请参阅图 4所示的方法， 主要包括：
401、 当用户设备接近第二基站时， 用户设备向正在为用户设备服务的第 一基站发送接近指示。
该接近指示用于向第一基站通知该用户设备位于接近所述第二基站的位 置或正在向接近所述第二基站的位置移动。其中，接近指示包括第一接近指示、 第二接近指示、第三接近指示中的至少一个， 第一接近指示包括用户设备指示 的第二基站的载波的频率信息。第二接近指示包括第二基站的标识信息或封闭 用户组标识， 例如 ECGI、 PCI等。 第三接近指示包括用户设备当前所处位置 的位置信息。
在本发明实施例中， 当用户设备接近第二基站时， 用户设备向正在为该用 户设备服务的第一基站发送接近指示。 接近指示可以包括： 第一接近指示、 第 二接近指示、第三接近指示中的至少一个， 即用户设备向第一基站可以将第一 接近指示、第二接近指示、第三接近指示中的一个或两个或全部发送给第一基 站。 在实际应用中， 用户设备可以将第一接近指示、 第二接近指示、 第三接近 指示中的内容都预置在一个接近指示中向第一基站上报，也可以分开以多个接 近指示的方式向第一基站上报， 此处不作限定。
402、 用户设备接收第一基站基于接近指示下发的测量配置。
其中， 测量配置用于指示用户设备在测量配置指示的频率处执行测量。 在本发明实施例中， 第一基站接收到用户设备发送的接近指示之后， 第一 基站向用户设备下发测量配置， 用户设备可以接收到第一基站下发的测量配 置，第一基站指示用户设备在第二基站的可用载波的频率处或在第二基站当前 使用的载波的频率处执行测量。
403、 用户设备基于测量配置在测量配置指示的频率处执行测量， 生成测 量报告。
在本发明实施例中， 用户设备接收到第一基站下发的测量配置之后， 用户 设备根据该测量配置的指示，在测量配置指示的频率处执行测量， 具体可以为 用户设备在第二基站的可用载波的频率处或在第二基站当前使用的载波的频 率处执行测量， 生成基于测量配置的测量报告。 其中， 用户设备在某个载波的 频率执行测量并生成测量报告属于现有技术， 此处不再赘述。
404、 用户设备向第一基站发送测量报告， 测量报告被第一基站用于判断 是否将用户设备从第一基站切换到第二基站。
在本发明实施例中，用户设备在第二基站的可用载波的频率处或在第二基 站当前使用的载波的频率处执行测量并生成基于该测量配置的测量报告之后， 用户设备向第一基站反馈基于该测量配置的测量报告，以使第一基站能够根据 该测量报告判断是否将用户设备从第一基站切换到第二基站。
需要说明的是，在如图 4所示的实施例中， 第二基站的可用载波的频率信 息具体可以指的是第二基站的小区的可用载波的频率信息。第二基站当前使用 的载波的频率信息具体可以指的是第二基站的小区的当前使用的载波的频率 信息。
在本发明实施例中， 用户设备接近第二基站时， 向正在为用户设备服务的 第一基站发送接近指示。第一基站指示用户设备在第二基站的可用载波的频率 处或在第二基站当前使用的载波的频率处执行测量，用户设备按照第一基站的 指示执行测量， 生成基于测量配置的测量报告并向第一基站反馈该测量报告， 以使第一基站能够根据测量报告判断是否将用户设备从第一基站切换到第二 基站。由于第一基站能够获取到第二基站的可用载波的频率信息或当前正在使 用的载波的频率信息， 当第一基站向用户设备下发测量配置后， 用户设备能够 在第二基站的真实的载波的频率处执行测量，所以能够提高用户设备切换的成 功率。
本发明实施例还提供了基于基站侧实现的另一种基站切换方法， 如图 5 所示， 该基站切换方法包括：
501、 第一基站将第一基站的可用载波的频率信息或第一基站当前正在使 用的载波的频率信息发送给用户设备。
其中， 可用载波的频率信息为第一基站能够使用的所有的载波的频率信 息。
需要说明的是，第一基站的可用载波的频率信息为第一基站能够使用的所 有的载波的频率信息，第一基站的可用载波的频率信息具体可以为一个载波的 频率或多个载波的频率。第一基站当前使用的载波的频率信息为第一基站正工 作在的载波的频率。 为了能够避免周围基站的载波干扰， 第一基站可以将目前 工作的载波的频率动态的更换到其它的载波的频率。
在实际应用中，第一基站将第一基站的可用载波的频率信息或第一基站当 前正在使用的载波的频率信息发送给用户设备具体可以有多种实现方式， 例 如，第一基站可以通过专用信令将第一基站的可用载波的频率信息或第一基站 当前正在使用的载波的频率信息发送给用户设备， 该专用信令具体可以为： 无 线资源控制协议（RRC, Radio Resource Control )信令或媒介接入控制控制元 素 （MAC CE, Medium Access Control Control Elements )» 第一基站也可以将 第一基站的可用载波的频率信息或第一基站当前正在使用的载波的频率信息 广播给用户设备， 例如利用各种系统信息块（ System Information Block ) 实现 广播，第一基站可以周期性的广播自身的可用载波的频率信息或当前正在使用 的载波的频率信息。
需要说明的是， 在操作 501之前， 还可以包括如下操作：
第一基站判断用户设备是否第一次接入第一基站， 若是， 第一基站执行
501的操作。 若不是， 第一基站不执行 501的操作。 该操作的意义在于， 第一 基站仅向第一次接入该第一基站的用户设备发送可用载波的频率信息或第一 基站当前正在使用的载波的频率信息，而当用户设备不是第一接入该第一基站 时， 第一基站不执行 501的操作， 能够节省系统资源。
502、 当用户设备接近第一基站时， 第二基站接收用户设备发送的接近指 示。
该接近指示用于向第二基站通知该用户设备位于接近所述第一基站的位 置或正在向接近所述第一基站的位置移动。其中，接近指示包括第一基站的可 用载波的频率信息或第一基站当前正在使用的载波的频率信息，第二基站为当 前正在为用户设备服务的基站。 在本发明实施例中，通过用户设备向第二基站发送接近指示， 第二基站可 以获取到用户设备可能切换到的基站的载波的频率。在实际应用中， 用户设备 可以将第一基站的可用载波的频率信息或第一基站当前正在使用的载波的频 率信息都预置在一个接近指示中向第二基站上报，也可以分开以多个接近指示 的方式向第二基站上报， 此处不作限定。
503、 第二基站基于接近指示向用户设备下发测量配置。
其中， 测量配置用于指示用户设备在测量配置指示的频率处执行测量。 在本发明实施例中， 第二基站接收到用户设备发送的接近指示之后， 第二 基站向用户设备下发测量配置，指示用户设备在测量配置指示的频率处执行测 量，具体可以为指示用户设备在第一基站的可用载波的频率处或在第一基站当 前使用的载波的频率处执行测量。在实际应用中， 第二基站具体可以指示用户 设备在第一基站的每一个可用载波的频率处都执行测量。第二基站也可以指示 用户设备在第一基站当前使用的载波的频率处执行测量。
504、 第二基站接收用户设备反馈的基于测量配置的测量报告， 测量报告 被第二基站用于判断是否将用户设备从第二基站切换到第一基站。
在本发明实施例中， 第二基站向用户设备下发测量配置之后， 用户设备将 在第一基站的可用载波的频率处或在第一基站当前使用的载波的频率处执行 测量， 并生成基于该测量配置的测量报告， 则第二基站可以接收到用户设备反 馈的基于该测量配置的测量报告，以使第二基站能够根据该测量报告判断是否 将用户设备从第二基站切换到第一基站。
需要说明的是，在如图 5所示的实施例中， 第一基站的可用载波的频率信 息具体可以指的是第一基站的小区的可用载波的频率信息。第一基站当前使用 的载波的频率信息具体可以指的是第一基站的小区的当前使用的载波的频率 信息。
在本发明实施例中，第一基站将第一基站的可用载波的频率信息或第一基 站当前正在使用的载波的频率信息发送给用户设备，当用户设备接近第一基站 时，用户设备可以根据该第一基站的可用载波的频率信息或当前正在使用的载 波的频率信息向正在为该用户设备服务的第二基站发送接近指示，并根据第二 基站下发的测量配置在第一基站的可用载波的频率处或在正在使用的载波的 频率处执行测量，由于用户设备能够在第一基站的真实的载波的频率处执行测 量， 所以能够提高用户设备切换的成功率。
图 5 所示的实施例从基站侧描述了本发明实施例提供的另一种基站切换 方法，接下来介绍从用户设备侧描述的本发明实施例提供的另一种基站切换方 法， 请参阅图 6所示的方法， 主要包括：
601、 用户设备接收第一基站发送的第一基站的可用载波的频率信息或第 一基站当前正在使用的载波的频率信息。
其中， 可用载波的频率信息为第一基站能够使用的所有的载波的频率信 息。
需要说明的是，第一基站的可用载波的频率信息为第一基站能够使用的所 有的载波的频率信息，第一基站的可用载波的频率信息具体可以为一个载波的 频率或多个载波的频率。第一基站当前使用的载波的频率信息为第一基站正工 作在的载波的频率。 为了能够避免周围基站的载波干扰， 第一基站可以将目前 工作的载波的频率动态的更换到其它的载波的频率。
在实际应用中，用户设备可以通过专用信令接收第一基站发送的第一基站 的可用载波的频率信息或第一基站当前正在使用的载波的频率信息。或， 用户 设备通过第一基站的广播信息接收第一基站发送的第一基站的可用载波的频 率信息或第一基站当前正在使用的载波的频率信息。
602、 当用户设备接近第一基站时， 用户设备向正在为用户设备服务的第 二基站发送接近指示。
该接近指示用于向第二基站通知该用户设备位于接近所述第一基站的位 置或正在向接近所述第一基站的位置移动。其中，接近指示包括第一基站的可 用载波的频率信息或第一基站当前正在使用的载波的频率信息。
在本发明实施例中， 用户设备向第二基站发送接近指示， 第二基站通过该 接近指示可以获取到用户设备可能切换到的基站。在实际应用中， 用户设备可 以将接近指示中的内容都预置在一个接近指示中向第二基站上报，也可以分开 以多个接近指示的方式向第二基站上报， 此处不作限定。
603、 用户设备接收第二基站基于接近指示下发的测量配置。
其中， 测量配置用于指示用户设备在测量配置指示的频率处执行测量。 在本发明实施例中， 第二基站接收到用户设备发送的接近指示之后， 第二 基站向用户设备下发测量配置， 用户设备接收第二基站下发的测量配置。 604、 用户设备基于测量配置在测量配置指示的频率处执行测量， 生成基 于测量配置的测量报告。
在实际应用中， 用户设备基于测量配置在测量配置指示的频率处执行测 量， 具体可以在第一基站的每一个可用载波的频率处都执行测量。用户设备也 可以在第一基站当前使用的载波的频率处执行测量。其中， 用户设备在某个载 波的频率执行测量并生成测量报告属于现有技术， 此处不再赘述。
605、 用户设备向第二基站发送测量报告， 测量报告被第二基站用于判断 是否将用户设备从第二基站切换到第一基站。
需要说明的是，在如图 6所示的实施例中， 第一基站的可用载波的频率信 息具体可以指的是第一基站的小区的可用载波的频率信息。第一基站当前使用 的载波的频率信息具体可以指的是第一基站的小区的当前使用的载波的频率 信息。
在本发明实施例中， 用户设备接近第一基站时， 向正在为用户设备服务的 第二基站发送接近指示。第二基站指示用户设备在第一基站的可用载波的频率 处或在第一基站当前使用的载波的频率处执行测量，用户设备按照第二基站的 指示执行测量， 生成基于测量配置的测量报告并向第二基站反馈该测量报告， 以使第二基站能够根据测量报告判断是否将用户设备从第二基站切换到第一 基站。由于用户设备能够接收到第一基站的可用载波的频率信息或当前正在使 用的载波的频率信息， 当第二站向用户设备下发测量配置后， 用户设备能够在 第一基站的真实的载波的频率处执行测量，所以能够提高用户设备切换的成功 率。
以上实施例分别介绍了本发明实施例提供的基站切换方法，接下来介绍使 用该基站切换方法的基站和用户设备，具体各单元的执行方法可参见上述方法 实施例， 在此仅描述相关单元的内容， 请参阅图 7所示， 基站 700, 包括： 获取单元 701 , 用于获取第二基站的可用载波的频率信息或第二基站当前 使用的载波的频率信息，可用载波的频率信息为第二基站能够使用的所有的载 波的频率信息。
第一接收单元 702, 用于接收用户设备发送的接近指示， 接近指示包括第 一接近指示、 第二接近指示、 第三接近指示中的至少一个， 其中， 第一接近指 示包括用户设备指示的第二基站的载波的频率信息；第二接近指示包括第二基 站的标识信息或封闭用户组标识；第三接近指示包括用户设备当前所处位置的 位置信息。
指示单元 703 , 用于第一基站基于接近指示向用户设备下发测量配置， 测 量配置用于指示用户设备在测量配置指示的频率处执行测量。
第二接收单元 704, 用于接收用户设备反馈的基于测量配置的测量报告， 测量报告被基站 700判断是否将用户设备从第一基站切换到第二基站。
在实际应用中， 获取单元 701的一种可实现的方式是，获取单元 701具体 用于通过操作管理维护系统获取第二基站的可用载波的频率信息或第二基站 当前使用的载波的频率信息。 或， 获取单元 701具体用于通过 OAM系统接收 第二基站发送的第二基站的可用载波的频率信息或第二基站当前使用的载波 的频率信息。或， 获取单元 701具体用于通过第一基站和第二基站之间的接口 获得第二基站的可用载波的频率信息或第二基站当前使用的载波的频率信息。
在实际应用中，指示单元 703的一种可实现的方式是，指示单元 703具体 用于指示用户设备在第二基站的每一个可用载波的频率处都执行测量。或，指 示单元 703 具体用于指示用户设备在第二基站当前使用的载波的频率处执行 测量。
在实际应用中，指示单元 703的另一种可实现的方式是， 可用载波的频率 信息包括： 两个以上的可用载波的频率集合， 当接近指示包括第一接近指示 时， 指示单元 703包括：
第一查找模块， 用于根据第一接近指示所指示的载波的频率，从可用载波 的频率信息中查找第一接近指示所指示的载波的频率属于的可用载波的频率 集合；
第一指示模块，用于指示用户设备在第一接近指示所指示的载波的频率属 于的可用载波的频率集合中的每一个频率处执行测量。
在实际应用中，指示单元 703的另一种可实现的方式是， 可用载波的频率 信息包括： 两个以上的可用载波的频率集合， 当接近指示包括第二接近指示 时， 指示单元 703包括：
第二查找模块，用于根据第二接近指示所指示的第二基站的标识信息或封 闭用户组标识，从可用载波的频率信息中查找与第二接近指示所指示的第二基 站的标识信息或封闭用户组标识相对应的可用载波的频率集合； 第二指示模块，用于指示用户设备在与第二接近指示所指示的第二基站的 标识信息或封闭用户组标识相对应的可用载波的频率集合中的每一个频率处 执行测量。
需要说明的是，如图 7中所示的基站 700就是如图 3方法实施例中第一基 站。
需要说明的是， 上述装置各模块 /单元之间的信息交互、 执行过程等内容, 由于与本发明方法实施例基于同一构思，其带来的技术效果与本发明方法实施 例相同， 具体内容可参见本发明如图 3所示的方法实施例中的叙述， 此处不再 赘述。
在本发明实施例中，第一基站能够获取到第二基站的可用载波的频率信息 或第二基站当前使用的载波的频率信息， 当接收到用户设备发送的接近指示 后，第一基站指示用户设备在第二基站的可用载波的频率处或在第二基站当前 使用的载波的频率处执行测量，第一基站接收用户设备反馈的基于测量配置的 测量报告，以使第一基站能够根据测量报告判断是否将用户设备从第一基站切 换到第二基站。由于第一基站能够获取到第二基站的可用载波的频率信息或当 前正在使用的载波的频率信息， 当第一基站向用户设备下发测量配置后， 用户 设备能够在第二基站的真实的载波的频率处执行测量，所以能够提高用户设备 切换的成功率。
如图 8所示， 本发明实施例提供的一种用户设备 800, 包括：
第一发送单元 801 , 用于当用户设备接近第二基站时， 向正在为用户设备 服务的第一基站发送接近指示， 接近指示包括第一接近指示、 第二接近指示、 第三接近指示中的至少一个， 其中， 第一接近指示包括用户设备指示的第二基 站的载波的频率信息；第二接近指示包括第二基站的标识信息或封闭用户组标 识； 第三接近指示包括用户设备当前所处位置的位置信息。
接收单元 802, 用于接收第一基站基于接近指示下发的测量配置， 测量配 置用于指示用户设备在测量配置指示的频率处执行测量。
测量单元 803 , 用于基于测量配置在测量配置指示的频率处执行测量， 生 成基于测量配置的测量报告。
第二发送单元 804, 用于向第一基站发送测量报告， 测量报告被第一基站 用于判断是否将用户设备从第一基站切换到第二基站。 需要说明的是， 上述装置各模块 /单元之间的信息交互、 执行过程等内容, 由于与本发明方法实施例基于同一构思，其带来的技术效果与本发明方法实施 例相同， 具体内容可参见本发明如图 4所示的方法实施例中的叙述， 此处不再 赘述。
在本发明实施例中， 用户设备接近第二基站时， 向正在为用户设备服务的 第一基站发送接近指示。第一基站指示用户设备在第二基站的可用载波的频率 处或在第二基站当前使用的载波的频率处执行测量，用户设备按照第一基站的 指示执行测量， 生成基于测量配置的测量报告并向第一基站反馈该测量报告， 以使第一基站能够根据测量报告判断是否将用户设备从第一基站切换到第二 基站。由于第一基站能够获取到第二基站的可用载波的频率信息或当前正在使 用的载波的频率信息， 当第一基站向用户设备下发测量配置后， 用户设备能够 在第二基站的真实的载波的频率处执行测量，所以能够提高用户设备切换的成 功率。
如图 9所示， 本发明实施例还提供了一种通信系统 900, 包括： 第一基站 901和第二基站 902, 其中，
第一基站 901 用于将第一基站的可用载波的频率信息或第一基站当前正 在使用的载波的频率信息发送给用户设备，可用载波的频率信息为第一基站能 够使用的所有的载波的频率信息；
第二基站 902 包括第一接收单元 9021、 指示单元 9022、 第二指示单元 9023 , 第二基站 902为当前正在为用户设备服务的基站；
第一接收单元 9021 , 用于当用户设备接近第一基站时， 接收用户设备发 送的接近指示，接近指示包括第一基站 901的可用载波的频率信息或第一基站 901当前正在使用的载波的频率信息。
指示单元 9022, 用于基于接近指示向用户设备下发测量配置， 测量配置 用于指示用户设备在测量配置指示的频率处执行测量；
第二接收单元 9023 , 用于接收用户设备反馈的基于测量配置的测量报告， 测量报告被第二基站 902用于判断是否将用户设备从第二基站切换到第一基 站。
在实际应用中， 第一基站 901的一种可现实的方式是， 第一基站 901具体 用于通过专用信令将第一基站的可用载波的频率信息或第一基站当前正在使 用的载波的频率信息发送给用户设备。或， 第一基站 901具体用于第一基站的 可用载波的频率信息或第一基站当前正在使用的载波的频率信息广播给用户 设备。
需要说明的是， 上述装置各模块 /单元之间的信息交互、 执行过程等内容, 由于与本发明方法实施例基于同一构思，其带来的技术效果与本发明方法实施 例相同， 具体内容可参见本发明如图 5所示的方法实施例中的叙述， 此处不再 赘述。
在本发明实施例中，第一基站将第一基站的可用载波的频率信息或第一基 站当前正在使用的载波的频率信息发送给用户设备，当用户设备接近第一基站 时，用户设备可以根据该第一基站的可用载波的频率信息或当前正在使用的载 波的频率信息向正在为该用户设备服务的第二基站发送接近指示，并根据第二 基站下发的测量配置在第一基站的可用载波的频率处或在正在使用的载波的 频率处执行测量，由于用户设备能够在第一基站的真实的载波的频率处执行测 量， 所以能够提高用户设备切换的成功率。
如图 10所示， 本发明实施例还提供了另一种用户设备 1000, 包括： 第一接收单元 1001 , 用于接收第一基站发送的第一基站的可用载波的频 率信息或第一基站当前正在使用的载波的频率信息，可用载波的频率信息为第 一基站能够使用的所有的载波的频率信息；
第一发送单元 1002, 用于当用户设备接近第一基站时， 向正在为用户设 备服务的第二基站发送接近指示，接近指示包括第一基站的可用载波的频率信 息或第一基站当前正在使用的载波的频率信息；
第二接收单元 1003, 用于接收第二基站基于接近指示下发的测量配置， 测量配置用于指示用户设备在测量配置指示的频率处执行测量；
测量单元 1004, 用于基于测量配置在测量配置指示的频率处执行测量， 生成基于测量配置的测量报告；
第二发送单元 1005, 用于向第二基站发送测量报告， 测量报告被第二基 站用于判断是否将用户设备从第二基站切换到第一基站。
在实际应用中， 第一接收单元 1001的一种可实现的方式是， 第一接收单 元 1001具体用于通过专用信令接收第一基站发送的第一基站的可用载波的频 率信息或第一基站当前正在使用的载波的频率信息。 或， 第一接收单元 1001 具体用于通过第一基站的广播信息接收第一基站发送的第一基站的可用载波 的频率信息或第一基站当前正在使用的载波的频率信息。
需要说明的是， 上述装置各模块 /单元之间的信息交互、 执行过程等内容, 由于与本发明方法实施例基于同一构思，其带来的技术效果与本发明方法实施 例相同， 具体内容可参见本发明如图 6所示的方法实施例中的叙述， 此处不再 赘述。
在本发明实施例中， 用户设备接近第一基站时， 向正在为用户设备服务的 第二基站发送接近指示。第二基站指示用户设备在第一基站的可用载波的频率 处或在第一基站当前使用的载波的频率处执行测量，用户设备按照第二基站的 指示执行测量， 生成基于测量配置的测量报告并向第二基站反馈该测量报告， 以使第二基站能够根据测量报告判断是否将用户设备从第二基站切换到第一 基站。由于用户设备能够接收到第一基站的可用载波的频率信息或当前正在使 用的载波的频率信息， 当第二站向用户设备下发测量配置后， 用户设备能够在 第一基站的真实的载波的频率处执行测量，所以能够提高用户设备切换的成功 率。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可 读存储介质中， 上述提到的存储介质可以是只读存储器， 磁盘或光盘等。
以上对本发明所提供的一种基站切换方法、基站、用户设备和通信系统进行了 详细介绍， 对于本领域的一般技术人员， 依据本发明实施例的思想， 在具体实 施方式及应用范围上均会有改变之处， 综上所述， 本说明书内容不应理解为对 本发明的限制。

Claims

1、 一种基站切换方法， 其特征在于， 包括：
第一基站获取第二基站的可用载波的频率信息或所述第二基站当前使用 的载波的频率信息，所述可用载波的频率信息为所述第二基站能够使用的所有 的载波的频率信息；
所述第一基站接收用户设备发送的接近指示，所述接近指示包括第一接近 指示、 第二接近指示、 第三接近权指示中的至少一个， 其中， 所述第一接近指示 包括所述用户设备指示的所述第二基利 _站的载波的频率信息；所述第二接近指示 包括所述第二基站的标识信息或封闭用 2
2户要组标识 CSGID; 所述第三接近指示 包括所述用户设备当前所处位置的位置信息；
求
所述第一基站基于所述接近指示向所述用户设备下发测量配置，所述测量 配置用于指示所述用户设备在所述测量配置指示的频率处执行测量；
所述第一基站接收所述用户设备反馈的基于所述测量配置的测量报告，所 述测量报告被所述第一基站用于判断是否将所述用户设备从第一基站切换到 所述第二基站。
2、 根据权利要求 1所述的基站切换方法， 其特征在于， 所述第一基站获 取第二基站的可用载波的频率信息或所述第二基站当前使用的载波的频率信 息包括：
所述第一基站通过操作管理维护 OAM系统获取所述第二基站的可用载波 的频率信息或所述第二基站当前使用的载波的频率信息；
或，
所述第一基站通过 OAM系统接收所述第二基站发送的所述第二基站的可 用载波的频率信息或所述第二基站当前使用的载波的频率信息；
或，
所述第一基站通过所述第一基站和第二基站之间的接口获得所述第二基 站的可用载波的频率信息或所述第二基站当前使用的载波的频率信息。
3、 根据权利要求 1或 2所述的基站切换方法， 其特征在于， 所述测量配 置指示的频率包括：所述第二基站的可用载波频率或所述第二基站当前使用的 载波的频率。
4、 根据权利要求 1至 3中任一项权利要求所述的基站切换方法， 其特征 在于， 所述可用载波的频率信息包括： 两个以上的可用载波的频率集合；
当所述接近指示包括第一接近指示时，所述第一基站基于所述接近指示向 所述用户设备下发测量配置包括：
所述第一基站根据所述第一接近指示所指示的载波的频率，从所述可用载 波的频率信息中查找所述第一接近指示所指示的载波的频率属于的可用载波 的频率集合；
所述第一基站指示所述用户设备在所述第一接近指示所指示的载波的频 率属于的可用载波的频率集合中的每一个频率处执行测量。
5、 根据权利要求 1至 3中任一项权利要求所述的基站切换方法， 其特征 在于， 所述可用载波的频率信息包括： 两个以上的可用载波的频率集合；
当所述接近指示包括第二接近指示时，所述第一基站基于所述接近指示向 所述用户设备下发测量配置包括：
所述第一基站根据所述第二接近指示所指示的第二基站的标识信息或封 闭用户组标识，从所述可用载波的频率信息中查找与所述第二接近指示所指示 的第二基站的标识信息或封闭用户组标识相对应的可用载波的频率集合； 所述第一基站指示所述用户设备在与所述第二接近指示所指示的第二基 站的标识信息或封闭用户组标识相对应的可用载波的频率集合中的每一个频 率处执行测量。
6、 一种基站切换方法， 其特征在于， 包括：
当用户设备接近第二基站时，所述用户设备向正在为所述用户设备服务的 第一基站发送接近指示， 所述接近指示包括第一接近指示、 第二接近指示、 第 三接近指示中的至少一个， 其中，所述第一接近指示包括所述用户设备指示的 所述第二基站的载波的频率信息；所述第二接近指示包括所述第二基站的标识 信息或封闭用户组标识 CSGID; 所述第三接近指示包括所述用户设备当前所 处位置的位置信息；
所述用户设备接收所述第一基站基于所述接近指示下发的测量配置，所述 测量配置用于指示所述用户设备在所述测量配置指示的频率处执行测量； 所述用户设备基于所述测量配置在所述测量配置指示的频率处执行测量， 生成测量报告； 所述用户设备向所述第一基站发送所述测量报告，所述测量报告被所述第 一基站用于判断是否将所述用户设备从第一基站切换到所述第二基站。
7、 根据权利要求 6所述的基站切换方法， 其特征在于， 所述测量配置指 示的频率包括：所述第二基站的可用载波频率或所述第二基站当前使用的载波 的频率。
8、 一种基站切换方法， 其特征在于， 包括：
第一基站将所述第一基站的可用载波的频率信息或所述第一基站当前正 在使用的载波的频率信息发送给用户设备，所述可用载波的频率信息为所述第 一基站能够使用的所有的载波的频率信息；
当用户设备接近第一基站时， 第二基站接收所述用户设备发送的接近指 示，所述接近指示包括所述第一基站的可用载波的频率信息或所述第一基站当 前正在使用的载波的频率信息，所述第二基站为当前正在为所述用户设备服务 的基站；
所述第二基站基于所述接近指示向所述用户设备下发测量配置，所述测量 配置用于指示所述用户设备在所述测量配置指示的频率处执行测量；
所述第二基站接收所述用户设备反馈的基于所述测量配置的测量报告，所 述测量报告被所述第二基站用于判断是否将所述用户设备从第二基站切换到 所述第一基站。
9、 根据权利要求 8所述的基站切换方法， 其特征在于， 所述第一基站将 所述第一基站的可用载波的频率信息或所述第一基站当前正在使用的载波的 频率信息发送给用户设备包括：
所述第一基站通过专用信令将所述第一基站的可用载波的频率信息或所 述第一基站当前正在使用的载波的频率信息发送给用户设备；
或，所述第一基站将所述第一基站的可用载波的频率信息或所述第一基站 当前正在使用的载波的频率信息广播给用户设备。
10、 根据权利要求 7至 9中任一项所述的基站切换方法， 其特征在于， 所 述第一基站将所述第一基站的可用载波的频率信息或所述第一基站当前正在 使用的载波的频率信息发送给用户设备之前， 还包括：
所述第一基站判断所述用户设备是否第一次接入所述第一基站， 若是，执 行将所述第一基站的可用载波的频率信息或所述第一基站当前正在使用的载 波的频率信息发送给用户设备的操作。
11、 根据权利要求 7至 10中任一项所述的基站切换方法， 其特征在于， 所述测量配置指示的频率包括：所述第二基站的可用载波频率或所述第二基站 当前使用的载波的频率。
12、 一种基站切换方法， 其特征在于， 包括：
用户设备接收第一基站发送的所述第一基站的可用载波的频率信息或所 述第一基站当前正在使用的载波的频率信息，所述可用载波的频率信息为所述 第一基站能够使用的所有的载波的频率信息；
当用户设备接近第一基站时，所述用户设备向正在为所述用户设备服务的 第二基站发送接近指示，所述接近指示包括所述第一基站的可用载波的频率信 息或所述第一基站当前正在使用的载波的频率信息；
所述用户设备接收所述第二基站基于所述接近指示下发的测量配置，所述 测量配置用于指示所述用户设备在所述测量配置指示的频率处执行测量； 所述用户设备基于所述测量配置在所述测量配置指示的频率处执行测量， 生成测量报告；
所述用户设备向所述第二基站发送所述测量报告，所述测量报告被所述第 二基站用于判断是否将所述用户设备从第二基站切换到所述第一基站。
13、 根据权利要求 12所述的基站切换方法， 其特征在于， 所述用户设备 接收第一基站发送的所述第一基站的可用载波的频率信息或所述第一基站当 前正在使用的载波的频率信息包括：
所述用户设备通过专用信令接收第一基站发送的所述第一基站的可用载 波的频率信息或所述第一基站当前正在使用的载波的频率信息；
或，所述用户设备通过所述第一基站的广播信息接收第一基站发送的所述 第一基站的可用载波的频率信息或所述第一基站当前正在使用的载波的频率 信息。
14、 根据权利要求 12至 13中任一项所述的基站切换方法， 其特征在于， 所述测量配置指示的频率包括：所述第二基站的可用载波频率或所述第二基站 当前使用的载波的频率。
15、 一种基站， 其特征在于， 包括：
获取单元，用于获取第二基站的可用载波的频率信息或所述第二基站当前 使用的载波的频率信息，所述可用载波的频率信息为所述第二基站能够使用的 所有的载波的频率信息；
第一接收单元， 用于接收用户设备发送的接近指示， 所述接近指示包括第 一接近指示、 第二接近指示、 第三接近指示中的至少一个， 其中， 所述第一接 近指示包括所述用户设备指示的所述第二基站的载波的频率信息；所述第二接 近指示包括所述第二基站的标识信息或封闭用户组标识 CSGID; 所述第三接 近指示包括所述用户设备当前所处位置的位置信息；
指示单元，用于所述第一基站基于所述接近指示向所述用户设备下发测量 配置， 所述测量配置用于指示所述用户设备在测量配置指示的频率处执行测 量；
第二接收单元，用于接收所述用户设备反馈的基于所述测量配置的测量报 告，所述测量报告被所述基站用于判断是否将所述用户设备从第一基站切换到 所述第二基站。
16、 根据权利要求 15所述的基站， 其特征在于， 所述获取单元具体用于 通过操作管理维护 OAM系统获取所述第二基站的可用载波的频率信息或所述 第二基站当前使用的载波的频率信息；
或，
所述获取单元具体用于通过 OAM系统接收所述第二基站发送的所述第二 基站的可用载波的频率信息或所述第二基站当前使用的载波的频率信息； 或，
所述获取单元具体用于通过所述第一基站和第二基站之间的接口获得所 述第二基站的可用载波的频率信息或所述第二基站当前使用的载波的频率信
17、 根据权利要求 15或 16中任一项权利要求所述的基站， 其特征在于， 所述可用载波的频率信息包括： 两个以上的可用载波的频率集合；
当所述接近指示包括第一接近指示时， 所述指示单元包括：
第一查找模块， 用于根据所述第一接近指示所指示的载波的频率，从所述 可用载波的频率信息中查找所述第一接近指示所指示的载波的频率属于的可 用载波的频率集合；
第一指示模块，用于指示所述用户设备在所述第一接近指示所指示的载波 的频率属于的可用载波的频率集合中的每一个频率处执行测量。
18、 根据权利要求 15至 17中任一项权利要求所述的基站， 其特征在于， 所述可用载波的频率信息包括： 两个以上的可用载波的频率集合；
当所述接近指示包括第二接近指示时， 所述指示单元包括：
第二查找模块，用于根据所述第二接近指示所指示的第二基站的标识信息 或封闭用户组标识，从所述可用载波的频率信息中查找与所述第二接近指示所 指示的第二基站的标识信息或封闭用户组标识相对应的可用载波的频率集合； 第二指示模块，用于指示所述用户设备在与所述第二接近指示所指示的第 二基站的标识信息或封闭用户组标识相对应的可用载波的频率集合中的每一 个频率处执行测量。
19、 一种用户设备， 其特征在于， 包括：
第一发送单元， 用于当用户设备接近第二基站时， 向正在为所述用户设备 服务的第一基站发送接近指示， 所述接近指示包括第一接近指示、第二接近指 示、 第三接近指示中的至少一个， 其中， 所述第一接近指示包括所述用户设备 指示的所述第二基站的载波的频率信息；所述第二接近指示包括所述第二基站 的标识信息或封闭用户组标识 CSGID; 所述第三接近指示包括所述用户设备 当前所处位置的位置信息；
接收单元， 用于接收所述第一基站基于所述接近指示下发的测量配置， 所 述测量配置用于指示所述用户设备在所述测量配置指示的频率处执行测量； 测量单元， 用于基于所述测量配置在所述测量配置指示的频率处执行测 量， 生成测量报告；
第二发送单元， 用于向所述第一基站发送所述测量报告， 所述测量报告被 所述第一基站用于判断是否将所述用户设备从第一基站切换到所述第二基站。
20、 一种通信系统， 其特征在于， 包括： 第一基站和第二基站， 其中， 所述第一基站，用于将所述第一基站的可用载波的频率信息或所述第一基 站当前正在使用的载波的频率信息发送给用户设备，所述可用载波的频率信息 为所述第一基站能够使用的所有的载波的频率信息；
所述第二基站包括第一接收单元、 指示单元、 第二指示单元， 所述第二基 站为当前正在为所述用户设备服务的基站；
所述第一接收单元， 用于当用户设备接近第一基站时，接收所述用户设备 发送的接近指示，所述接近指示包括所述第一基站的可用载波的频率信息或所 述第一基站当前正在使用的载波的频率信息，所述第二基站为当前正在为所述 用户设备服务的基站；
指示单元， 用于基于所述接近指示向所述用户设备下发测量配置， 所述测 量配置用于指示所述用户设备在所述测量配置指示的频率处执行测量；
第二接收单元，用于接收所述用户设备反馈的基于所述测量配置的测量报 告，所述测量报告被所述第二基站用于判断是否将所述用户设备从第二基站切 换到所述第一基站。
21、 根据权利要求 20所述的通信系统， 其特征在于， 所述第一基站具体 用于通过专用信令将所述第一基站的可用载波的频率信息或所述第一基站当 前正在使用的载波的频率信息发送给用户设备；
或，所述第一基站具体用于所述第一基站的可用载波的频率信息或所述第 一基站当前正在使用的载波的频率信息广播给用户设备。
22、 一种用户设备， 其特征在于， 包括：
第一接收单元，用于接收第一基站发送的所述第一基站的可用载波的频率 信息或所述第一基站当前正在使用的载波的频率信息，所述可用载波的频率信 息为所述第一基站能够使用的所有的载波的频率信息；
第一发送单元， 用于当用户设备接近第一基站时， 向正在为所述用户设备 服务的第二基站发送接近指示，所述接近指示包括所述第一基站的可用载波的 频率信息或所述第一基站当前正在使用的载波的频率信息；
第二接收单元， 用于接收所述第二基站基于所述接近指示下发的测量配 置，所述测量配置用于指示所述用户设备在所述测量配置指示的频率处执行测 量；
测量单元， 用于基于所述测量配置在所述测量配置指示的频率处执行测 量， 生成测量报告；
第二发送单元， 用于向所述第二基站发送所述测量报告， 所述测量报告被 所述第二基站用于判断是否将所述用户设备从第二基站切换到所述第一基站。
23、 根据权利要求 22所述的用户设备， 其特征在于， 所述第一接收单元 具体用于通过专用信令接收第一基站发送的所述第一基站的可用载波的频率 信息或所述第一基站当前正在使用的载波的频率信息； 或，所述第一接收单元具体用于通过所述第一基站的广播信息接收第一基 站发送的所述第一基站的可用载波的频率信息或所述第一基站当前正在使用 的载波的频率信息。
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