WO2014044116A1 - 一种认知无线电系统中的切换控制方法及装置 - Google Patents

一种认知无线电系统中的切换控制方法及装置 Download PDF

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Publication number
WO2014044116A1
WO2014044116A1 PCT/CN2013/082550 CN2013082550W WO2014044116A1 WO 2014044116 A1 WO2014044116 A1 WO 2014044116A1 CN 2013082550 W CN2013082550 W CN 2013082550W WO 2014044116 A1 WO2014044116 A1 WO 2014044116A1
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WIPO (PCT)
Prior art keywords
target cell
reconfiguration
user equipment
handover
base station
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PCT/CN2013/082550
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English (en)
French (fr)
Inventor
苗婷
李岩
刘星
王斌
任龙涛
张媛媛
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP13839443.2A priority Critical patent/EP2887737B1/en
Priority to US14/429,490 priority patent/US9655024B2/en
Publication of WO2014044116A1 publication Critical patent/WO2014044116A1/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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • 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
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to the field of wireless communication and cognitive radio technologies, and in particular, to a handover control method and apparatus in a cognitive radio system.
  • the spectrum of some broadcast television systems is not used in some areas; some broadcast television system spectrums are covered in some areas, but some Some moments have not been used and the overall utilization rate is low.
  • the fixed spectrum allocation method makes the above unused spectrum resources unreusable, for example, cannot be used by the International Mobile Telecommunications (IMT) system.
  • Cognitive radio technology solves this problem, that is, through the cognitive radio technology IMT system, based on the acquisition of information on the broadcast television system, opportunistically occupying unused spectrum resources of the radio and television system in space and time (TVWS, TV White Space) , thereby improving the utilization rate of the spectrum (authorized spectrum) of the broadcast television system and improving the spectrum tension of the system.
  • a cognitive radio system can "opportunistically" use a channel (ie, TVWS) that the primary user (television broadcast system) does not use at a particular time and location. Therefore, the TVWS spectrum that can be used by cognitive radio systems is constantly changing, for example due to the arrival of the primary user (ie the primary user reoccupies TVWS) or other reasons, the cognitive radio system must exit the TVWS spectrum being used, or reconfigure to other On the TVWS spectrum (ie, exiting the TVWS spectrum being used, and reconfiguring other TVWS spectrums), and reconfiguration delay may also cause disruption of user equipment (UE, User Equipment) services.
  • Switching technology is one of the core technologies of mobile communication systems.
  • Excellent handover algorithms can provide more efficient and reliable handover services between two adjacent base stations for users with handover call requests, thus providing system communication quality and system capacity.
  • the serving cell of the user equipment before the handover is called the source cell, and the base station to which the source cell belongs is called the source base station.
  • the cell to which the user equipment is ready to be handed over (that is, the cell that becomes the serving cell of the user equipment after the handover succeeds) is called the target cell, and the target cell.
  • the associated base station is the target base station.
  • the handover decision technique used by the communication system is mainly that the UE measures the signal strength and signal quality of the source cell and the neighboring cell, and reports the measurement result to the base station to which the source cell belongs. Determining whether to trigger the handover according to the set threshold, and selecting the target cell according to the measurement result of the UE; the prior art does not consider that the target cell is a cell of the cognitive radio system (for example, a cell using the TVWS spectrum) in the handover procedure. Case.
  • the target cell is a cell of a cognitive radio system (e.g., a cell that uses the TVWS spectrum or other system to authorize the spectrum)
  • the prior art handover decision method still has the following problems:
  • the target cell generates a frequency resource reconfiguration, for example, the TVWS spectrum fl is reconfigured to £2, and at this time, the UE does not know that the spectrum resource of the target cell has changed, and the UE cannot determine the previous determination.
  • the target cell thus causing the handover failure, and even if the UE knows the spectrum resource change of the target cell, the measurement result and the handover decision of the target cell fl frequency are invalid because of the change of the frequency point, that is, £2 is not necessarily suitable for UE handover, and may also cause handover failure;
  • the spectrum resource re-allocation occurs in the target cell, and the UE is re-allocated.
  • the service of the UE is affected by the reconfiguration delay. If the target cell reconfiguration time is too long, the UE may be interrupted. ;
  • the base station to which the source cell belongs does not consider the spectrum attribute of the target cell when performing the target cell selection. Specifically, it does not consider whether the target cell is a cell that uses the TVWS spectrum cell or uses the licensed spectrum of other radio access technology communication systems. Instead, the default target cell uses the licensed spectrum; as the TVWS spectrum cell may have a spectrum resource reconfiguration, the number of UE handovers will increase.
  • Summary of the invention The technical problem to be solved by the present invention is to provide a handover control method and apparatus in a cognitive radio system, which controls a cell handover process of a user equipment, and can switch the user equipment to a suitable target cell as much as possible.
  • the present invention provides a handover control method in a cognitive radio system, including:
  • the source base station receives the measurement report sent by the user equipment
  • the source base station performs handover control on the user equipment according to the measurement report, the radio resource management information, and the reconfiguration related information.
  • the source base station performs handover control on the user equipment according to the measurement report, the radio resource management information, and the reconfiguration related information, including:
  • the reconfiguration related information includes one or more of the following: a frequency effective time, a reconfiguration delay, and an average reconfiguration frequency; wherein: the frequency effective time refers to a current cell starting from a current time The time length of the time when the current working spectrum is exited; the reconfiguration delay refers to the time required for the current cell to complete the reconfiguration process; the average reconfiguration frequency refers to the number of reconfigurations within the preset time period; wherein, the candidate target The reconfiguration related information of the cell is acquired by the source base station from the base station to which the candidate target cell belongs.
  • the performing, by the switching, the user equipment, according to the reconfiguration related information of the candidate target cell includes:
  • the source base station selects the candidate target cell as the target cell of the handover, to the target
  • the target base station to which the cell belongs sends a handover request message to complete the handover of the user equipment to the target cell; or
  • the source base station selects the The candidate target cell is the target cell of the handover, and sends a handover request message to the target base station to which the target cell belongs to complete the handover of the user equipment to the target cell;
  • the source base station selects the candidate target cell as the target cell of the handover, and sends a handover request message to the target base station to which the target cell belongs to complete the user equipment to the target cell. Switch; or
  • the source base station selects the candidate target cell as the target cell of the handover, and the target cell belongs to the target cell.
  • the base station sends a handover request message to complete the handover of the user equipment to the target cell; or
  • the source base station selects the candidate target cell as the target cell to be handed over, and sends a handover request message to the target base station to which the target cell belongs to complete the user equipment, when the average number of reconfigurations of the candidate target cell is less than the average reconfiguration frequency threshold. Switching to the target cell; or
  • the source base station selects the candidate target cell as the handover target cell, and belongs to the target cell.
  • the target base station sends a handover request message to complete the handover of the user equipment to the target cell;
  • the present invention also provides a handover control method in a cognitive radio system, including:
  • the source base station receives the measurement report sent by the user equipment
  • the source base station determines the target cell according to the measurement report and the radio resource management information, and sends a handover request message to the target base station;
  • the target base station After receiving the handover request message, the target base station performs handover control on the user equipment according to the reconfiguration related information of the target cell.
  • the reconfiguration related information includes one or more of the following: a frequency effective time, a reconfiguration delay, and an average reconfiguration frequency; wherein: the frequency effective time refers to a current cell starting from a current time The time length of the time when the current working spectrum is exited; the reconfiguration delay refers to the time required for the current cell to complete the reconfiguration process; and the average reconfiguration frequency refers to the number of reconfigurations within the preset time period.
  • the performing, by the switching, the user equipment according to the reconfiguration related information of the target cell includes:
  • Determining whether the frequency effective time of the target cell is greater than a spectrum effective time threshold Determining whether the frequency effective time of the target cell is greater than a spectrum effective time threshold. When the spectrum effective time of the target cell is greater than the frequency effective time threshold, the user equipment is subjected to admission control to complete the user equipment direction. Switching of the target cell; or
  • the user equipment performs admission control to complete the handover of the user equipment to the target cell, or determines whether the average reconfiguration frequency of the target cell is less than the average reconfiguration frequency threshold, and the average reconfiguration frequency of the target cell is less than the average weight.
  • the user equipment is subjected to admission control to complete the handover of the user equipment to the target cell; or
  • Determining whether the frequency effective time of the target cell is greater than the spectrum effective time threshold When the spectrum effective time of the target cell is greater than the frequency effective time threshold, determining whether the reconfiguration delay of the target cell is smaller than the user equipment When the reconfiguration delay of the target cell is smaller than the reconfiguration delay of the user equipment service, the user equipment is subjected to admission control to complete the user equipment to the target cell. Switch; or Determining whether the frequency effective time of the target cell is greater than a spectrum effective time threshold.
  • the spectrum effective time of the target cell is greater than a frequency effective time threshold, determining whether the average reconfiguration frequency of the target cell is less than an average weight If the average reconfiguration frequency of the target cell is less than the average reconfiguration frequency threshold, the user equipment is subjected to admission control to complete the handover of the user equipment to the target cell; or
  • the user equipment performs admission control on the user equipment to complete the handover of the user equipment to the target cell, when the average reconfiguration frequency of the target cell is less than the average reconfiguration frequency threshold.
  • the present invention further provides a handover control apparatus in a cognitive radio system, which is located at a source base station, and includes a receiving module and a handover control module, where:
  • the receiving module is configured to: receive a measurement report sent by the user equipment;
  • the switching control module is configured to: perform switching control on the user equipment according to the measurement report, the radio resource management information, and the reconfiguration related information.
  • the handover control module includes a candidate target cell determination unit and a handover control unit, where:
  • the candidate target cell determining unit is configured to: determine a candidate target cell according to the measurement report and the radio resource management information;
  • the handover control unit is configured to: according to the reconfiguration related information of the candidate target cell, The user equipment performs switching control.
  • the reconfiguration related information includes one or more of the following: a frequency effective time, a reconfiguration delay, and an average reconfiguration frequency; wherein the frequency effective time refers to the current cell starting from the current time to exiting The time length of the current working spectrum; the reconfiguration delay refers to the time required for the current cell to complete the reconfiguration process; the average reconfiguration frequency refers to the number of reconfigurations in the preset time period; wherein, the candidate target cell
  • the reconfiguration related information is obtained by the source base station from the base station to which the candidate target cell belongs.
  • the handover control unit is configured to: perform handover control on the user equipment according to the reconfiguration related information of the candidate target cell, including:
  • the handover control unit determines whether the frequency effective time of the candidate target cell is greater than a frequency effective time threshold, and when the frequency effective time of the candidate target cell is greater than the frequency effective time threshold, the handover control unit selects the candidate target The cell is the target cell of the handover, and sends a handover request message to the target base station to which the target cell belongs to complete the handover of the user equipment to the target cell; or
  • the handover control unit determines whether the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service requirement, and when the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service requirement
  • the handover control unit selects the candidate target cell as the target cell of the handover, and sends a handover request message to the target base station to which the target cell belongs to complete the handover of the user equipment to the target cell; or
  • the handover control unit determines whether the average number of reconfigurations of the candidate target cell is less than the average reconfiguration frequency threshold. When the average reconfiguration frequency of the candidate target cell is less than the average reconfiguration threshold, the handover control unit selects the candidate target.
  • the cell is the target cell of the handover, and sends a handover request message to the target base station to which the target cell belongs to complete the handover of the user equipment to the target cell; or
  • the handover control unit determines whether the frequency effective time of the candidate target cell is greater than the frequency effective time threshold, and determines the reconfiguration delay of the candidate target cell when the frequency effective time of the candidate target cell is greater than the frequency effective time threshold. If the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service, the handover control unit selects the candidate target cell as the handover.
  • the target cell sends a handover request message to the target base station to which the target cell belongs, to complete the handover of the user equipment to the target cell; or
  • the handover control unit determines whether the frequency effective time of the candidate target cell is greater than the frequency effective time threshold, and when the frequency effective time of the candidate target cell is greater than the frequency effective time threshold, Whether the average reconfiguration frequency of the candidate target cell is smaller than the average reconfiguration frequency threshold. When the average reconfiguration frequency of the candidate target cell is smaller than the average reconfiguration frequency threshold, the handover control unit selects the candidate target cell as the handover target cell. Transmitting a handover request message to the target base station to which the target cell belongs, to complete the handover of the user equipment to the target cell; or
  • the handover control unit determines whether the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service requirement, and when the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service requirement And determining, by the switching control unit, that the candidate target cell is switched, if the average reconfiguration frequency of the candidate target cell is less than the average reconfiguration frequency threshold, and the average reconfiguration frequency of the candidate target cell is less than the average reconfiguration frequency threshold.
  • the target cell sends a handover request message to the target base station to which the target cell belongs, to complete the handover of the user equipment to the target cell; or
  • the handover control unit determines whether the frequency effective time of the candidate target cell is greater than the frequency effective time threshold, and determines the reconfiguration delay of the candidate target cell when the frequency effective time of the candidate target cell is greater than the frequency effective time threshold. If the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service, it is determined whether the average reconfiguration frequency of the candidate target cell is less than the average weight. When the average number of reconfigurations of the candidate target cell is less than the average reconfiguration frequency threshold, the handover control unit selects the candidate target cell as the target cell of the handover, and sends a handover request to the target base station to which the target cell belongs. The message is used to complete the handover of the user equipment to the target cell.
  • the present invention further provides a handover control apparatus in a cognitive radio system, which is located at a base station, including a source base station processing module and a target base station processing module, where:
  • the source base station processing module is configured to: when the base station is a source base station, receive a measurement report sent by the user equipment, determine a target cell according to the measurement report, the radio resource management information, and send a handover request message to the target base station;
  • the target base station processing module is configured to: when the base station is the target base station, after receiving the handover request message, perform handover control on the user equipment according to the reconfiguration related information of the target cell.
  • the reconfiguration related information includes one or more of the following: a frequency effective time, a reconfiguration delay, and an average reconfiguration frequency; wherein the frequency effective time refers to that the current cell is opened from the current time.
  • the target base station processing module is configured to: perform handover control on the user equipment according to the reconfiguration related information of the target cell, including:
  • the target base station processing module determines whether the spectrum effective time of the target cell is greater than a spectrum effective time threshold, and performs admission control on the user equipment when the frequency effective time of the target cell is greater than a frequency effective time threshold And completing, by the target base station processing module, whether the reconfiguration delay of the target cell is smaller than a reconfiguration delay value of the service requirement of the user equipment, when the reconfiguration of the target cell is performed.
  • the delay is less than the reconfiguration delay of the user equipment service, the user equipment is subjected to admission control to complete the handover of the user equipment to the target cell; or
  • the target base station processing module determines whether the average number of reconfigurations of the target cell is less than an average reconfiguration frequency threshold, and when the average reconfiguration frequency of the target cell is less than an average reconfiguration frequency threshold, performing the user equipment Receiving control to complete handover of the user equipment to the target cell; or the target base station processing module determining whether the spectrum effective time of the target cell is greater than a spectrum effective time threshold, when the frequency effective time of the target cell is greater than the frequency term
  • the effective time it is determined whether the reconfiguration delay of the target cell is smaller than the reconfiguration delay of the user equipment service requirement, and the reconfiguration delay of the target cell is smaller than the reconfiguration delay of the service requirement of the user equipment.
  • the user equipment is subjected to admission control to complete the handover of the user equipment to the target cell; or
  • the target base station processing module determines whether the spectrum effective time of the target cell is greater than a spectrum effective time threshold, and when the frequency effective time of the target cell is greater than a frequency effective time threshold, determining an average weight of the target cell Whether the number of times of the matching is smaller than the average number of re-matching times, and when the average number of re-matching times of the target cell is smaller than the average number of re-allocations, the user equipment is subjected to admission control to complete the switching of the user equipment to the target cell; or
  • the target base station processing module determines whether the reconfiguration delay of the target cell is smaller than a reconfiguration delay of the user equipment service, and the reconfiguration delay of the target cell is smaller than the reconfiguration delay of the service requirement of the user equipment. When the value is wide, it is determined whether the average reconfiguration frequency of the target cell is smaller than the average reconfiguration frequency threshold. When the average reconfiguration frequency of the target cell is less than the average reconfiguration frequency threshold, the user equipment is subjected to admission control.
  • the target base station processing module determines whether the spectrum effective time of the target cell is greater than a spectrum effective time threshold, and when the frequency effective time of the target cell is greater than the frequency effective time threshold, determining the reconfiguration of the target cell Whether the delay is smaller than the reconfiguration delay of the user equipment service.
  • the average reconfiguration frequency of the target cell is determined. If the average reconfiguration frequency is less than the average reconfiguration frequency threshold, the user equipment is subjected to admission control to complete the handover of the user equipment to the target cell.
  • the technical solution of the present application is used to control the cell handover process of the user equipment, and the user equipment can be switched to the appropriate target cell as much as possible, and the handover failure caused by the spectrum resource reconfiguration of the target cell in the UE handover process is specifically solved.
  • FIG. 1 is a flowchart of a method for implementing handover control by a source base station according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of a switching control apparatus according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of a method for implementing handover control by a target base station according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic structural diagram of a handover control apparatus according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic flowchart of a handover control method implemented by a source eNB according to a frequency effective time of a target cell according to an application example of the present invention
  • FIG. 6 is a schematic flowchart of application example 2 of the present invention, where a source eNB implements handover control according to a frequency effective time and a reconfiguration delay of a target cell;
  • FIG. 7 is a schematic flowchart of applying the example 3 of the present invention to implement handover control according to the frequency effective time and the average number of reconfiguration times of the target cell;
  • FIG. 8 is a frequency effective time and reconfiguration time of a source eNB according to an application example 4 of the present invention according to a target cell; Schematic diagram of the process of delaying the average number of re-matching times to achieve switching control;
  • FIG. 9 is a schematic flowchart of an application example 5 of the present invention, in which a target eNB implements handover control according to a spectrum effective time of a target cell;
  • FIG. 10 is a schematic flowchart of a preferred embodiment 6 of a method for implementing a handover control method according to an application example 6 of a target eNB according to a frequency effective time and a reconfiguration delay of a target cell;
  • FIG. 11 is a schematic flowchart of application example 7 of the present invention, in which a target eNB implements handover control according to a frequency-frequency effective time and a re-repeating frequency of a target cell;
  • FIG. 12 is a schematic flowchart of the application example 8 of the present invention.
  • the target eNB implements handover control according to the frequency effective time, the reconfiguration delay, and the average reconfiguration frequency of the target cell.
  • This embodiment describes a handover control method implemented by a source base station, and the process is as shown in FIG. 1 , including: Step 101: A source base station receives a measurement report sent by a user equipment.
  • the process further includes: the user equipment performs measurement according to the measurement configuration of the base station (source base station), and then reports the measurement result to the base station according to the measurement result reporting manner in the measurement configuration, where all processes are prior art, where No longer said.
  • Step 102 The source base station performs handover control on the user equipment according to the measurement report, the radio resource management information, and the reconfiguration related information.
  • the source base station determines the candidate target cell according to the measurement report and the radio resource management information, and performs handover control on the user equipment according to the reconfiguration related information of the candidate target cell.
  • the above reconfiguration related information includes one or more of the following contents: spectrum effective time, reconfiguration delay, and average reconfiguration times;
  • the effective time of the spectrum refers to the time length of the current cell from the current time to the time when the current working spectrum is exited. Specifically, the time of exiting the current working spectrum may be determined by the number of base stations to which the cell belongs. When the database is acquired at the same time, the base station of the cell may be obtained according to the statistical prediction of the sensing result of the spectrum, or may be set by the administrator when the radio resource is optimized;
  • the reconfiguration delay refers to the time required for the current cell to complete the reconfiguration process from the resource reconfiguration to the reconfiguration process, that is, the time required for the current cell to complete the reconfiguration process, which may be a statistical value obtained according to the previous reconfiguration delay;
  • the average reconfiguration frequency refers to the number of reconfigurations in a preset time period, which may be obtained according to a statistical rule of the number of previous cell reconfiguration times, for example, the number of reconfigurations in the past 24 hours;
  • the switching control performed by the source base station according to the reconfiguration related information is also different.
  • the source base station determines, according to the measurement report and the radio resource management information, the candidate target cell according to the prior art, and determines whether the frequency effective time of the candidate target cell is greater than the frequency effective time.
  • the threshold value is that when the frequency effective time of the candidate target cell is greater than the spectrum effective time threshold, the source base station selects the candidate target cell as the target cell of the handover, and sends a handover request message to the target base station to which the target cell belongs, and then according to the existing The process specified by the protocol is performed to complete the handover of the user equipment to the target cell.
  • the target cell does not reconfigure, that is, the user equipment is guaranteed.
  • the handover is completed before the reconfiguration of the target cell, so as to avoid the handover failure.
  • the reconfiguration related information only includes the reconfiguration delay
  • the source base station determines the candidate target cell according to the measurement report and the radio resource management information according to the prior art, and then determines The reconfiguration delay of the candidate target cell is
  • the source base station selects the candidate target cell as the target cell of the handover,
  • the target base station to which the target cell belongs sends a handover request message, and then performs the process according to the existing protocol to complete the handover of the user equipment to the target cell.
  • the reconfiguration delay during the handover the user equipment can be switched to the target cell. After that, the reconfiguration delay of the target cell does not cause the user equipment service to be interrupted;
  • the source base station determines, according to the measurement report and the radio resource management information, the candidate target cell according to the prior art, and determines whether the average reconfiguration frequency of the candidate target cell is less than the average reconfiguration frequency. If the average number of reconfigurations of the candidate target cell is less than the average reconfiguration frequency threshold, the source base station selects the candidate target cell as the target cell for handover. Sending a handover request message to the target base station to which the target cell belongs, and then performing the process according to the existing protocol to complete the handover of the user equipment to the target cell; by referring to the average reconfiguration frequency when switching, the user equipment can be switched to the target. After the cell, the switching frequency (reconfiguration frequency) of the user equipment is not too high, that is, the switching frequency is lowered;
  • the reconfiguration related information includes a frequency effective time and a reconfiguration delay.
  • the source base station determines, according to the measurement report and the radio resource management information, the candidate target cell according to the prior art, and determines whether the frequency effective time of the candidate target cell is greater than When the spectrum effective time of the candidate target cell is greater than the frequency effective time threshold, it is further determined whether the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service requirement, when the candidate target When the reconfiguration delay of the cell is smaller than the reconfiguration delay threshold required by the user equipment service, the source base station selects the candidate target cell as the target cell of the handover, and sends a handover request message to the target base station to which the target cell belongs, and then according to the existing Execution of the process specified by the protocol to complete the handover of the user equipment to the target cell;
  • the source base station determines, according to the measurement report and the radio resource management information, the candidate target cell according to the prior art, and determines whether the frequency effective time of the candidate target cell is greater than When the frequency effective time of the candidate target cell is greater than the spectrum effective time threshold, it is further determined whether the average number of reconfigurations of the candidate target cell is less than the average reconfiguration frequency threshold, and the average weight of the candidate target cell
  • the source base station selects the candidate target cell as the target cell for handover, and sends a handover request message to the target base station to which the target cell belongs, and then executes according to the procedure specified in the existing protocol to complete the user. Switching of the device to the target cell;
  • the source base station determines, according to the measurement report and the radio resource management information, the candidate target cell according to the prior art, and determines whether the reconfiguration delay of the candidate target cell is smaller than If the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service, it is further determined whether the average reconfiguration frequency of the candidate target cell is less than the average reconfiguration.
  • the source base station selects the candidate target cell as the handover target cell, and sends a handover request message to the target base station to which the target cell belongs, and then Execution of the process specified by the existing protocol to complete the handover of the user equipment to the target cell;
  • the source base station determines the candidate target cell according to the measurement report and the radio resource management information according to the prior art, it is determined whether the frequency effective time of the candidate target cell is greater than the spectrum effective time threshold, and the frequency effective time of the candidate target cell is greater than the spectrum effective time. In the case of a threshold, the source base station determines whether the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service request, and the reconfiguration delay of the candidate target cell is smaller than the reconfiguration delay of the user equipment service requirement.
  • the source base station determines whether the average number of reconfigurations of the candidate target cell is less than the average reconfiguration frequency threshold. When the average reconfiguration frequency of the candidate target cell is less than the average reconfiguration frequency threshold, the source base station selects the candidate target.
  • the cell is the target cell of the handover, and sends a handover request message to the target base station to which the target cell belongs, and then performs the process according to the existing protocol to complete the handover of the user equipment to the target cell.
  • the reconfiguration related information of the candidate target cell may be obtained by the source base station from the base station to which the candidate target cell belongs.
  • the source base station can obtain the reconfiguration related information of the candidate target cell from the neighbor information list maintained by itself, the source base station does not have to acquire the information from the base station to which the candidate target cell belongs.
  • the above spectrum effective time threshold, reconfiguration delay threshold and average reconfiguration threshold may be changed and preset according to the actual situation or management needs of the network; in addition, the selection of the reconfiguration delay and the user equipment are ongoing.
  • the re-allocation delay value can be selected as 100 milliseconds; if the user equipment is performing real-time game, the re-allocation delay value can be selected as 50 milliseconds.
  • the switching control device at the source base station implementing the above method includes a receiving module 201 and a switching control module 202, where:
  • the receiving module 201 is configured to receive a measurement report sent by the user equipment.
  • the handover control module 202 is configured to perform handover control on the user equipment according to the measurement report, the radio resource management information, and the reconfiguration related information.
  • the handover control module includes a candidate target cell determining unit 2021 and a handover control unit 2022, where:
  • the candidate target cell determining unit is configured to determine a candidate target cell according to the measurement report and the radio resource management information;
  • the handover control unit is configured to perform handover control on the user equipment according to reconfiguration related information of the candidate target cell.
  • scenario 1 - scenario 7 For details about the specific switching control of the user equipment of the switching control unit, refer to scenario 1 - scenario 7 above, and details are not described here.
  • This embodiment describes a handover control method implemented by a target base station.
  • the process is as shown in FIG. 3, and specifically includes:
  • Step 301 The source base station receives a measurement report sent by the user equipment.
  • Step 302 The source base station determines the target cell according to the measurement report and the radio resource management information, and sends a handover request message to the target base station.
  • Step 303 After receiving the handover request message, the target base station performs handover control on the user equipment according to the reconfiguration related information of the target cell.
  • the handover control performed by the target base station according to the reconfiguration related information of the target cell is also different.
  • the target base station when the reconfiguration related information only includes the frequency effective time, after the target base station receives the handover request message of the source base station, it determines whether the frequency effective time of the target cell is greater than the frequency effective time threshold, when the frequency of the target cell When the effective time is greater than the spectrum effective time threshold, the target base station performs admission control (AC, Admission Control) according to the prior art, and then completes the handover according to the procedure specified by the existing protocol, and finally completes the handover of the user equipment to the target cell, when the judgment condition is met.
  • admission control Admission Control
  • the target base station may send a handover preparation failure message to the source base station, and the source base station receives the handover preparation failure message and processes according to the process specified by the existing protocol.
  • the user equipment can ensure the target device to the target.
  • the target cell does not reconfigure, that is, the user equipment is required to complete the handover before the target cell reconfiguration, thereby avoiding the handover failure;
  • the reconfiguration related information includes only the reconfiguration delay.
  • the target base station After receiving the handover request message from the source base station, the target base station determines whether the reconfiguration delay of the target cell is smaller than the reconfiguration delay of the user equipment service. When the reconfiguration delay of the target cell is smaller than the reconfiguration delay of the user equipment service, The target base station performs admission control according to the prior art, and then completes the handover according to the procedure specified by the existing protocol, and finally completes the handover of the user equipment to the target cell. When the judgment condition is not met, the target base station may send a handover preparation failure message to the source base station. After receiving the handover preparation failure message, the source base station processes according to the procedure specified in the existing protocol. By referring to the reconfiguration delay in the handover, the reconfiguration delay of the target cell does not cause the user equipment after the user equipment switches to the target cell. Business interruption
  • the target base station receives the handover request message of the source base station, it determines whether the average reconfiguration frequency of the target cell is less than the average reconfiguration frequency threshold, and the average weight of the target cell When the number of matching times is less than the average reconfiguration frequency threshold, the target base station performs admission control according to the prior art, and then completes the handover according to the procedure specified by the existing protocol, and finally completes the handover of the user equipment to the target cell.
  • the target The base station may send a handover preparation failure message to the source base station, and the source base station receives the handover preparation failure message and processes according to the process specified by the existing protocol.
  • the switching frequency (reconfiguration frequency) of the device is not too high, that is, the switching frequency is reduced;
  • the reconfiguration related information includes the frequency effective time and the reconfiguration delay.
  • the target base station After receiving the handover request message of the source base station, the target base station determines whether the frequency effective time of the target cell is greater than the frequency effective time threshold. If the frequency of the target cell is greater than the effective time of the frequency, the method further determines whether the reconfiguration delay of the target cell is smaller than the reconfiguration delay of the user equipment, and the reconfiguration delay of the target cell is smaller than the user equipment.
  • the target base station performs admission control according to the prior art, and then completes the handover according to the procedure specified by the existing protocol, and finally completes the handover of the user equipment to the target cell, when at least one of the foregoing determination conditions is not satisfied.
  • the target base station may send a handover preparation failure message to the source base station, and the source base station receives the handover preparation failure message and processes according to the procedure specified in the existing protocol;
  • the target base station determines whether the spectrum effective time of the target cell is greater than the frequency effective time threshold, when the target When the frequency effective time of the cell is greater than the frequency effective time threshold, it is further determined whether the average reconfiguration frequency of the target cell is less than the average reconfiguration frequency threshold, and when the average reconfiguration frequency of the target cell is less than the average reconfiguration frequency threshold, The target base station performs admission control according to the prior art, and then performs handover according to the procedure specified by the existing protocol, and finally completes handover of the user equipment to the target cell. When at least one of the foregoing determination conditions is not met, the target base station may send a handover to the source base station. Prepare the failure message, and the source base station receives the handover preparation failure message and processes according to the procedure specified in the existing protocol;
  • the target base station performs admission control according to the prior art, and then completes the handover according to the procedure specified by the existing protocol, and finally completes the handover of the user equipment to the target cell, when at least one of the above judgment conditions is not satisfied.
  • the target base station may send a handover preparation failure message to the source base station, and the source base station receives the handover preparation failure message and processes according to the procedure specified in the existing protocol;
  • the target base station performs the admission control according to the prior art, and then completes the handover according to the procedure specified by the existing protocol, and finally completes the handover of the user equipment to the target cell.
  • the target base station may send the handover preparation failure to the source base station.
  • the source base station receives the handover preparation failure message and follows the existing agreement. Flow processing.
  • the foregoing handover preparation failure message includes the reason for the handover failure, including any one or more of the following: the target cell frequency effective time is not satisfied, the reconfiguration delay is not satisfied, and the average reconfiguration frequency is not satisfied.
  • the above-mentioned frequency effective time threshold, re-allocation delay threshold and average re-distribution threshold can be changed and preset according to the actual situation or management needs of the network; in addition, the selection of the re-allocation delay value and the user equipment are in progress
  • the re-matching delay value can be selected as 100 milliseconds; when the user equipment is performing real-time game, the re-allocation delay value can be selected as 50 milliseconds.
  • the handover control apparatus implementing the above method, as shown in FIG. 4, is located at the base station, and includes a source base station processing module 401 and a target base station processing module 402.
  • the handover control device is located at the base station.
  • the base station When the base station serves as the source base station, it is dominated by the source base station processing module 401. When the base station serves as the target base station, it is dominated by the target base station processing module 402. For a base station, it may serve as a source simultaneously. Base station and target base station. In the picture:
  • the source base station processing module 401 is configured to: when the base station is the source base station, receive a measurement report sent by the user equipment, determine a target cell according to the measurement report, the radio resource management information, and send a handover request message to the target base station;
  • the target base station processing module 402 is configured to: when the base station is the target base station, after receiving the handover request message, perform handover control on the user equipment according to the reconfiguration related information of the target cell.
  • the target base station processing module 402 For the specific switching control content of the target device by the target base station processing module 402, refer to the scenario 1 - scenario 7 above, and details are not described herein.
  • the following handover control method follows the handover control structure of the UE (User Equipment) side controlled by the enhanced Node Base Station in the existing LTE system, and the mobility management entity ( ⁇ , Mobility Management Entity) does not participate in the handover control. It is only responsible for the transmission of user plane data streams and path transfer.
  • UE User Equipment
  • ⁇ Mobility Management Entity
  • This example describes the flow of the source eNB to implement handover control according to the spectrum effective time of the target cell. As shown in FIG. 5, the following steps are included:
  • Step 501 The UE completes the measurement of the specified signal according to the measurement trigger condition specified in the protocol. Sending a MEASUREMENT REPORT to the source eNB;
  • Step 502 The source eNB determines, according to the “Measurement Report” and the Radio Resource Management (RRM) information, the candidate target cell.
  • RRM Radio Resource Management
  • the process of the source base station determining the candidate target cell is the same as the process of determining the target cell by the source base station in the prior art, and is not described here.
  • Step 503 The source eNB acquires a spectrum effective time of the candidate target cell from the target eNB to which the candidate target cell belongs.
  • the source eNB sends a frequency effective time request message to the target eNB to which the candidate target cell belongs, and the target eNB to which the candidate target cell belongs sends a frequency effective time response message to the source eNB, where the frequency effective time response message includes the candidate target cell.
  • the source eNB needs to calculate the spectrum effective time of the candidate target cell according to the time when the candidate target cell exits the current working spectrum, that is, the candidate target cell continues to use the current time from the current time to the current working spectrum. Length of time of the working spectrum;
  • the source eNB can obtain the spectrum effective time information of the candidate target cell from the neighbor information list maintained by itself, the source eNB does not need to obtain the information from the target eNB to which the candidate target cell belongs, directly from the neighbor information. Get the information in the list;
  • Step 504 The source eNB performs handover control on the UE according to the frequency effective time of the candidate target cell.
  • the source eNB determines that Celll is the candidate target cell according to the "Measurement Report" message and the radio resource management information, and the current working TVWS frequency of Celll is valid for 1.5 minutes. At this time, Cellll The frequency effective time is greater than the frequency effective time threshold of 1 minute, so the source eNB selects Celll as the target cell;
  • Step 505 The source eNB sends a handover request to the target eNB to which the selected target cell belongs, and then performs the handover procedure according to the existing LTE protocol, and finally completes the handover of the user equipment to the target cell.
  • Application example 2 This example describes the flow of the source eNB to implement handover control according to the frequency effective time and reconfiguration delay of the target cell. As shown in Figure 6, the following steps are included:
  • Steps 601-602 are the same as steps 501-502, and are not described here.
  • Step 603 The source eNB acquires a spectrum effective time and a reconfiguration delay of the candidate target cell from the target eNB to which the candidate target cell belongs.
  • the source eNB sends a handover control information request message to the target eNB to which the candidate target cell belongs, and the target eNB to which the candidate target cell belongs sends a handover control information response message to the source eNB, where the handover control information response message includes the exit current of the candidate target cell.
  • the source eNB needs to calculate the frequency effective time of the candidate target cell according to the time when the candidate target cell exits the current working spectrum, that is, when the candidate target cell starts from the current time and exits its current working spectrum. The length of time during which the current working spectrum is continuously used;
  • the source eNB can obtain the spectrum effective time and the reconfiguration delay information of the candidate target cell from the neighbor information list maintained by the source eNB, the source eNB does not need to obtain the information from the target eNB to which the candidate target cell belongs.
  • the information may be obtained by directly obtaining the information from the neighboring cell information list.
  • Step 604 The source eNB performs handover control on the UE according to the frequency effective time and the reconfiguration delay of the candidate target cell.
  • the source eNB is assumed to be based on the measurement.
  • the message and radio resource management information determines that Celll is the candidate target cell.
  • the current working time of Celll frequency of Celll is 1.5 minutes, and the reconfiguration delay is 90 milliseconds.
  • the valid time of the frequency of Celll is greater than the effective time of the frequency.
  • the value is 1 minute, and the reconfiguration delay is 90 milliseconds less than the reconfiguration delay threshold of 100 milliseconds, so the source eNB selects Celll as the target cell;
  • Step 605 The source eNB sends a handover request to the target eNB to which the selected target cell belongs, and then performs the handover procedure according to the existing LTE protocol, and finally completes the handover of the user equipment to the target cell.
  • Application example 3 This example describes the flow of the source eNB to implement handover control according to the frequency effective time and the average number of reconfiguration times of the target cell. As shown in Figure 7, the following steps are included:
  • Steps 701-702 are the same as steps 501-502, and are not described here.
  • Step 703 The source eNB acquires the frequency effective time and the average number of reconfiguration times of the candidate target cell from the target eNB to which the candidate target cell belongs.
  • the source eNB sends a handover control information request message to the target eNB to which the candidate target cell belongs, and the target eNB to which the candidate target cell belongs sends a handover control information response message to the source eNB, where the handover control information response message includes the exit current of the candidate target cell.
  • the time of the working spectrum and the average number of reconfigurations the source eNB needs to calculate the frequency effective time of the candidate target cell according to the time when the candidate target cell exits the current working spectrum, that is, when the candidate target cell starts from the current time and exits its current working spectrum. The length of time during which the current working spectrum is continuously used;
  • the source eNB can obtain the spectrum effective time and the average reconfiguration number information of the candidate target cell from the neighbor information list maintained by the source eNB, the source eNB does not need to obtain the information from the target eNB to which the candidate target cell belongs. Obtaining the information directly from the neighboring cell information list; Step 704: The source eNB is configured according to the frequency effective time and the average reconfiguration frequency of the candidate target cell.
  • the UE performs handover control
  • the source eNB determines Cell as the candidate target cell according to the "measurement report" message and the radio resource management information, and the current Celll
  • the working time of the TVWS frequency is 1.5 minutes, and the average number of re-matching times is 0.2 times/hour.
  • the effective time of the frequency of Celll is greater than the effective time of the frequency of 1 minute, and the average number of re-matching times is 0.2 times/hour less than the average.
  • the reconfiguration frequency is 0.5 times/hour, so the source eNB selects Celll as the target cell;
  • Step 705 The source eNB sends a handover request to the target eNB to which the selected target cell belongs, and then performs the handover procedure according to the existing LTE protocol, and finally completes the handover of the user equipment to the target cell.
  • Application example 4 This example describes a flow in which the source eNB implements handover control according to the spectrum effective time, the reconfiguration delay, and the average reconfiguration count of the target cell. As shown in Figure 8, the following steps are included:
  • Steps 801-802 are the same as steps 501-502, and are not described here.
  • Step 803 The source eNB acquires a frequency effective time, a reconfiguration delay, and an average reconfiguration frequency of the candidate target cell from the target eNB to which the candidate target cell belongs.
  • the source eNB sends a handover control information request message to the target eNB to which the candidate target cell belongs, and the target eNB to which the candidate target cell belongs sends a handover control information response message to the source eNB, where the handover control information response message includes the exit current of the candidate target cell.
  • the source eNB needs to calculate the frequency effective time of the candidate target cell according to the time when the candidate target cell exits the current working spectrum, that is, the candidate target cell starts from the current time.
  • the source eNB can obtain the frequency effective time, reconfiguration delay, and average weight of the candidate target cell from the neighbor information list maintained by itself If the number of times information is used, the source eNB does not need to obtain the information from the target eNB to which the candidate target cell belongs, and directly obtains the information from the neighboring cell information list;
  • Step 804 The source eNB performs handover control on the UE according to the frequency effective time, the reconfiguration delay, and the average reconfiguration frequency of the candidate target cell.
  • the source eNB is based on the "measurement report" message and the radio resource management information. Determine that Celll is the candidate target cell. Celll's current working TVWS frequency is 1.5 minutes, the reconfiguration delay is 90 milliseconds, the average reconfiguration frequency is 0.2 times/hour, and the reconfiguration delay is 90 milliseconds.
  • the frequency effective time is greater than the frequency effective time threshold of 1 minute, and the reconfiguration delay of 90 milliseconds is less than the reconfiguration delay width of 100 milliseconds, and the average reconfiguration frequency of 0.2 times/hour is less than the average reconfiguration frequency threshold of 0.5 times. /hour, so the source eNB selects Celll as the target cell;
  • Step 805 The source eNB sends a handover request to the target eNB to which the selected target cell belongs, and then performs the handover procedure according to the existing LTE protocol, and finally completes the handover of the user equipment to the target cell.
  • This example describes the process by which the target eNB implements handover control based on the spectrum effective time of the target cell. As shown in Figure 9, the following steps are included:
  • Steps 901-902 are the same as steps 501-502, and are not described here.
  • Step 903 The source eNB sends a handover request message to the target eNB to which the target cell belongs.
  • the content and format of the handover request message are all in the prior art, and are not described here.
  • Step 904 The target eNB receives the source eNB. After the handover request message, the UE performs handover control according to the frequency effective time of the target cell;
  • Step 905 The target eNB performs admission control (AC, Admission Control) according to the prior art, and then performs the handover procedure according to the existing LTE protocol, and finally completes the handover of the user equipment to the target cell.
  • AC Admission Control
  • This example describes the flow of the target eNB to implement handover control based on the spectrum effective time and reconfiguration delay of the target cell. As shown in Figure 10, the following steps are included:
  • Steps 1001-1003 are the same as steps 901-903, and are not described here.
  • Step 1004 After receiving the handover request message of the source eNB, the target eNB performs handover control on the UE according to the frequency effective time and the reconfiguration delay of the target cell.
  • the UE is a voice service, so the reconfiguration delay time width value is selected as 100 milliseconds
  • the frequency valid time of the Celll is greater than the frequency effective time of the frequency of 1 minute
  • the reconfiguration delay of 90 milliseconds is less than the reconfiguration delay time value of 100 milliseconds, so that the UE can be guaranteed not to be targeted after switching to the target cell Celll.
  • the spectrum reconfiguration delay of the cell is too long, causing the UE to drop the line;
  • Step 1005 The target eNB performs admission control according to the prior art, and then performs the handover procedure according to the existing LTE protocol, and finally completes the handover of the user equipment to the target cell.
  • This example describes the flow of the target eNB to implement handover control based on the spectrum effective time and the average number of reconfigurations of the target cell. As shown in Figure 11, the following steps are included:
  • Steps 1101-1103 are the same as steps 901-903, and are not described here.
  • Step 1104 After receiving the handover request message of the source eNB, the target eNB performs handover control on the UE according to the frequency effective time and the average reconfiguration frequency of the target cell.
  • the frequency effective time threshold and the average reconfiguration frequency threshold as 1 minute and 0.5 times/hour respectively, assuming that Celll is the target cell, the current working TVWS frequency of Celll is 1.5 minutes, and the average number of reconfigurations is 1.5 times. It is 0.2 times/hour. At this time, the valid time of the frequency of Celll is greater than the effective time of the frequency of the frequency of 1 minute, and the average number of re-matching times is 0.2 times/hour less than the average re-matching threshold of 0.5 times/hour, so the UE can be guaranteed to switch. After reaching the target cell Celll, the UE user experience is not affected by the frequent reconfiguration of the target cell;
  • Step 1105 The target eNB performs admission control according to the prior art, and then performs the handover procedure according to the existing LTE protocol, and finally completes the handover of the user equipment to the target cell.
  • This example describes the flow of handover control by the target eNB according to the frequency effective time, reconfiguration delay, and average reconfiguration frequency of the target cell. As shown in Figure 12, the following steps are included:
  • Steps 1201-1203 are the same as steps 901-903, and are not described here.
  • Step 1204 After receiving the handover request message of the source eNB, the target eNB performs handover control on the UE according to the spectrum effective time, the reconfiguration delay, and the average reconfiguration frequency of the target cell.
  • the frequency value of the frequency effective time, the re-matching delay threshold and the average re-matching threshold are 1 minute, respectively.
  • 100 milliseconds and 0.5 times/hour, 4 is to set Celll as the target cell, Celll's current working TVWS frequency is 1.5 minutes, the reconfiguration delay is 90 milliseconds, and the average reconfiguration frequency is 0.2 times/hour.
  • the reconfiguration delay is 90 milliseconds.
  • the frequency effective time of the Celll is greater than the effective time of the frequency speech by 1 minute, and the reconfiguration delay is less than 90 milliseconds, the reconfiguration delay is 100 milliseconds, and the average reconfiguration frequency is 0.2 times.
  • the hour/hour is less than the average reconfiguration frequency of 0.5 times/hour. Therefore, it can be ensured that after the UE switches to the target cell Celll, the UE will not be dropped because the spectrum reconfiguration delay of the target cell is too long, and the target cell is not lost. Frequent reconfiguration to affect the UE user experience;
  • Step 1205 The target eNB performs admission control according to the prior art, and performs the handover procedure according to the existing LTE protocol, and finally completes the handover of the user equipment to the target cell.
  • the technical solution of the present application is used to control the cell handover process of the user equipment, and the user equipment can be switched to the appropriate target cell as much as possible, and the handover failure caused by the spectrum resource reconfiguration of the target cell in the UE handover process is specifically solved.

Abstract

认知无线电系统中的切换控制方法及装置，对用户设备的小区切换过程进行控制，能够尽量将用户设备切换到合适的目标小区。所述方法包括：源基站接收用户设备发送的测量报告；源基站根据所述测量报告、无线资源管理信息以及重配相关信息对所述用户设备进行切换控制。所述装置位于源基站，包括接收模块、切换控制模块。采用本发明实施例方法和装置，能够尽量将用户设备切换到合适的目标小区，避免UE切换过程中由于目标小区发生频谱资源重配而导致的切换失败，以及UE切换到目标小区后由于目标小区发生频谱资源重配而导致的UE业务中断和频繁切换的问题。

Description

一种认知无线电系统中的切换控制方法及装置
技术领域
本发明涉及无线通信及认知无线电技术领域， 具体涉及一种认知无线电 系统中的切换控制方法及装置。
背景技术
随着无线电技术的不断进步， 各种各样的无线电业务大量涌现， 而无线 电业务所依托的频谱资源是有限的， 面对人们对带宽需求的不断增加， 频谱 资源表现出极为紧张的局面； 而另一方面在传统的固定频谱分配模式下， 频 谱资源的利用率却不高。 从某种意义上讲， 是这种固定分配给授权系统的频 谱分配制度造成了频谱资源极为紧张的局面。 而认知无线电（CR, Cognitive Radio )技术就打破了传统意义上的频谱固定分配制度，将频谱在系统间动态 分配， 提高了频谱的利用效率。 研究发现广播电视系统频谱资源在很大程度 上存在着可利用的空间， 如某些广播电视系统频谱在某些地区并未被使用； 某些广播电视系统频谱在某地区虽有覆盖， 但某些时刻没有被使用， 整体利 用率偏低。 而固定的频谱分配方式使得上述未被使用的频谱资源无法重新利 用， 例如无法为国际移动电话 ( IMT, International Mobile Telecom ) 系统所 用。 而认知无线电技术解决了这一问题， 即通过认知无线电技术 IMT系统根 据对广播电视系统信息的获取， 伺机的占用广电系统在空间和时间上未使用 的频谱资源（TVWS, TV White Space ) , 从而提高广播电视系统频谱（授权 频谱） 的利用率， 改善了 ΙΜΤ系统频谱紧张的局面。
认知无线电系统可以 "伺机" 使用主用户 （电视广播系统）在特定时间 和位置没有使用的信道（即 TVWS )。因此，认知无线电系统可以使用的 TVWS 频谱是不断变化的， 例如由于主用户到来（即主用户重新占用 TVWS )或其 它原因， 认知无线电系统必须退出正在使用的 TVWS 频谱， 或重配到其它 TVWS频谱上（即退出正在使用的 TVWS频谱， 并重新配置其它 TVWS频 谱） ， 并且重配时延也可能引起用户设备 ( UE, User Equipment ) 业务的中 断。 切换技术是移动通信系统的核心技术之一， 优秀的切换算法能够为有切 换呼叫请求的用户在两个相邻基站间提供更加高效和更可靠的切换服务， 从 而提供系统通信质量和系统容量。 切换前用户设备的服务小区称为源小区， 源小区所属的基站称为源基站； 用户设备准备切换到的小区 （即切换成功后 成为用户设备的服务小区的小区）称为目标小区， 目标小区所属的基站为目 标基站。
通常， 通信系统 （如长期演进系统 LTE )釆用的切换判决技术主要是 UE对源小区和邻小区的信号强度和信号质量进行测量， 并将测量结果上报 给源小区所属基站； 源小区所属基站根据设置的阔值来判断是否触发切换， 并根据 UE的测量结果选择目标小区； 现有技术在切换流程中并未考虑目标 小区是认知无线电系统的小区（如， 使用 TVWS频谱的小区）时的情况。 当 目标小区是认知无线电系统的小区（如，使用 TVWS频谱或其它系统授权频 谱的小区） 时， 仍釆用现有技术中的切换判决方法会存在如下问题：
1、 在 UE切换过程中， 目标小区发生频语资源重配， 例如由 TVWS频 谱 fl重配至 £2, 而此时 UE并不知道目标小区的频谱资源发生了改变， 导致 UE无法找到之前确定的目标小区， 因而导致切换失败， 而且， 即使 UE获知 了目标小区的频谱资源变化请况，但此前对目标小区 fl频点的测量结果及切 换决策也由于频点的变化而无效， 也就是说 £2并不一定适合 UE切换， 同样 可能会造成切换失败；
2、 UE切换到目标小区不久， 目标小区发生频谱资源重配， UE也随之 重配， 而 UE的业务会受重配延时的影响， 如果目标小区重配时间过长可能 导致 UE业务中断；
3、源小区所属基站在进行目标小区选择时，并没有考虑目标小区的频谱 属性， 具体的， 并没有考虑目标小区是否为使用 TVWS频谱小区或使用其它 无线接入技术通信系统的授权频谱的小区， 而是默认目标小区使用的是授权 频谱； 由于 TVWS频谱小区可能出现频谱资源重配情况， 会导致 UE切换的 次数增大。 发明内容 本发明要解决的技术问题是提供一种认知无线电系统中的切换控制方法 及装置， 对用户设备的小区切换过程进行控制， 能够尽量将用户设备切换到 合适的目标小区。
为解决上述技术问题， 本发明提供了一种认知无线电系统中的切换控制 方法， 包括：
源基站接收用户设备发送的测量报告；
源基站根据所述测量报告、 无线资源管理信息以及重配相关信息对所述 用户设备进行切换控制。
优选地， 所述源基站根据所述测量报告、 无线资源管理信息以及重配相 关信息对所述用户设备进行切换控制， 包括：
所述源基站根据所述测量报告、 无线资源管理信息确定候选目标小区， 根据候选目标小区的重配相关信息对所述用户设备进行切换控制。
优选地，所述重配相关信息包括以下内容的一种或多种：频语有效时间， 重配时延， 平均重配次数； 其中： 所述频语有效时间指当前小区从当前时刻 开始到退出当前工作频谱的时刻的时间长度； 所述重配时延指当前小区完成 重配过程需要的时间；所述平均重配次数指预设时间段内的重配次数；其中， 所述候选目标小区的重配相关信息由源基站从候选目标小区所属基站获取。
优选地， 所述根据候选目标小区的重配相关信息对所述用户设备进行切 换控制， 包括：
判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选 目标小区的频谱有效时间大于频语有效时间阔值时， 源基站选择该候选目标 小区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
判断候选目标小区的重配时延是否小于用户设备业务要求的重配时延阔 值， 当候选目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 源基站选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标基 站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
判断候选目标小区的平均重配次数是否小于平均重配次数阔值， 当候选 目标小区的平均重配次数小于平均重配次数阔值时， 源基站选择该候选目标 小区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选 目标小区的频谱有效时间大于频语有效时间阔值时， 判断候选目标小区的重 配时延是否小于用户设备业务要求的重配时延阔值， 当候选目标小区的重配 时延小于用户设备业务要求的重配时延阔值时， 源基站选择该候选目标小区 为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完 成用户设备向目标小区的切换； 或者
判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选 目标小区的频谱有效时间大于频语有效时间阔值时， 判断候选目标小区的平 均重配次数是否小于平均重配次数阔值， 当候选目标小区的平均重配次数小 于平均重配次数阔值时， 源基站选择该候选目标小区为切换的目标小区， 向 该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区 的切换； 或者
判断候选目标小区的重配时延是否小于用户设备业务要求的重配时延阔 值， 当候选目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 判断候选目标小区的平均重配次数是否小于平均重配次数阔值， 当候选目标 小区的平均重配次数小于平均重配次数阔值时， 源基站选择该候选目标小区 为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完 成用户设备向目标小区的切换； 或者
判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选 目标小区的频谱有效时间大于频语有效时间阔值时， 判断候选目标小区的重 配时延是否小于用户设备业务要求的重配时延阔值， 当候选目标小区的重配 时延小于用户设备业务要求的重配时延阔值时， 判断候选目标小区的平均重 配次数是否小于平均重配次数阔值， 当候选目标小区的平均重配次数小于平 均重配次数阔值时， 源基站选择该候选目标小区为切换的目标小区， 向该目 标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区的切 换。 为解决上述技术问题， 本发明还提供了一种认知无线电系统中的切换控 制方法， 包括：
源基站接收用户设备发送的测量报告；
源基站根据所述测量报告、 无线资源管理信息确定目标小区， 向目标基 站发送切换请求消息；
目标基站收到所述切换请求消息后， 根据所述目标小区的重配相关信息 对所述用户设备进行切换控制。
优选地，所述重配相关信息包括以下内容的一种或多种：频语有效时间， 重配时延， 平均重配次数； 其中： 所述频语有效时间指当前小区从当前时刻 开始到退出当前工作频谱的时刻的时间长度； 所述重配时延指当前小区完成 重配过程需要的时间； 所述平均重配次数指预设时间段内的重配次数。
优选地， 所述根据所述目标小区的重配相关信息对所述用户设备进行切 换控制， 包括：
判断所述目标小区的频语有效时间是否大于频谱有效时间阔值， 当所述 目标小区的频谱有效时间大于频语有效时间阔值时， 对所述用户设备进行接 纳控制， 以完成用户设备向目标小区的切换； 或者
判断所述目标小区的重配时延是否小于用户设备业务要求的重配时延阔 值， 当所述目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者 判断所述目标小区的平均重配次数是否小于平均重配次数阔值， 当所述 目标小区的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接 纳控制， 以完成用户设备向目标小区的切换； 或者
判断所述目标小区的频语有效时间是否大于频谱有效时间阔值， 当所述 目标小区的频谱有效时间大于频语有效时间阔值时， 判断所述目标小区的重 配时延是否小于用户设备业务要求的重配时延阔值， 当所述目标小区的重配 时延小于用户设备业务要求的重配时延阔值时， 对所述用户设备进行接纳控 制， 以完成用户设备向目标小区的切换； 或者 判断所述目标小区的频语有效时间是否大于频谱有效时间阔值， 当所述 目标小区的频谱有效时间大于频语有效时间阔值时， 判断所述目标小区的平 均重配次数是否小于平均重配次数阔值， 当所述目标小区的平均重配次数小 于平均重配次数阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向 目标小区的切换； 或者
判断所述目标小区的重配时延是否小于用户设备业务要求的重配时延阔 值， 当所述目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 判断所述目标小区的平均重配次数是否小于平均重配次数阔值， 当所述目标 小区的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接纳控 制， 以完成用户设备向目标小区的切换； 或者
判断所述目标小区的频语有效时间是否大于频谱有效时间阔值， 当所述 目标小区的频谱有效时间大于频语有效时间阔值时， 判断所述目标小区的重 配时延是否小于用户设备业务要求的重配时延阔值， 当所述目标小区的重配 时延小于用户设备业务要求的重配时延阔值时， 判断所述目标小区的平均重 配次数是否小于平均重配次数阔值， 当所述目标小区的平均重配次数小于平 均重配次数阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标 小区的切换。
为解决上述技术问题， 本发明还提供了一种认知无线电系统中的切换控 制装置， 位于源基站， 包括接收模块、 切换控制模块， 其中：
所述接收模块， 设置为： 接收用户设备发送的测量报告；
所述切换控制模块， 设置为： 根据所述测量报告、 无线资源管理信息以 及重配相关信息对所述用户设备进行切换控制。
优选地，所述切换控制模块包括候选目标小区确定单元和切换控制单元， 其中：
所述候选目标小区确定单元， 设置为： 根据所述测量报告、 无线资源管 理信息确定候选目标小区；
所述切换控制单元， 设置为： 根据候选目标小区的重配相关信息对所述 用户设备进行切换控制。
优选地，所述重配相关信息包括以下内容的一种或多种：频语有效时间， 重配时延， 平均重配次数； 其中所述频语有效时间指当前小区从当前时刻开 始到退出当前工作频谱的时刻的时间长度； 所述重配时延指当前小区完成重 配过程需要的时间； 所述平均重配次数指预设时间段内的重配次数； 其中， 所述候选目标小区的重配相关信息由源基站从候选目标小区所属基站获取。
优选地， 所述切换控制单元设置为： 根据候选目标小区的重配相关信息 对所述用户设备进行切换控制， 包括：
所述切换控制单元判断候选目标小区的频语有效时间是否大于频语有效 时间阔值， 当候选目标小区的频语有效时间大于频语有效时间阔值时， 所述 切换控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的 目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的重配时延是否小于用户设备业务 要求的重配时延阔值， 当候选目标小区的重配时延小于用户设备业务要求的 重配时延阔值时，所述切换控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小 区的切换； 或者
所述切换控制单元判断候选目标小区的平均重配次数是否小于平均重配 次数阔值， 当候选目标小区的平均重配次数小于平均重配次数阔值时， 所述 切换控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的 目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的频语有效时间是否大于频语有效 时间阔值， 当候选目标小区的频语有效时间大于频语有效时间阔值时， 判断 候选目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当候 选目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 所述切换 控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标 基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的频语有效时间是否大于频语有效 时间阔值， 当候选目标小区的频语有效时间大于频语有效时间阔值时， 判断 候选目标小区的平均重配次数是否小于平均重配次数阔值， 当候选目标小区 的平均重配次数小于平均重配次数阔值时， 所述切换控制单元选择该候选目 标小区为切换的目标小区，向该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的重配时延是否小于用户设备业务 要求的重配时延阔值， 当候选目标小区的重配时延小于用户设备业务要求的 重配时延阔值时， 判断候选目标小区的平均重配次数是否小于平均重配次数 阔值， 当候选目标小区的平均重配次数小于平均重配次数阔值时， 所述切换 控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标 基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的频语有效时间是否大于频语有效 时间阔值， 当候选目标小区的频语有效时间大于频语有效时间阔值时， 判断 候选目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当候 选目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 判断候选 目标小区的平均重配次数是否小于平均重配次数阔值， 当候选目标小区的平 均重配次数小于平均重配次数阔值时， 所述切换控制单元选择该候选目标小 区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以 完成用户设备向目标小区的切换。
为解决上述技术问题， 本发明还提供了一种认知无线电系统中的切换控 制装置， 位于基站， 包括源基站处理模块和目标基站处理模块， 其中：
所述源基站处理模块， 设置为： 在所述基站为源基站时， 接收用户设备 发送的测量 告， 根据所述测量 告、 无线资源管理信息确定目标小区， 向 目标基站发送切换请求消息；
所述目标基站处理模块， 设置为： 在所述基站为目标基站时， 在收到所 述切换请求消息后， 根据所述目标小区的重配相关信息对所述用户设备进行 切换控制。
优选地，所述重配相关信息包括以下内容的一种或多种：频语有效时间， 重配时延， 平均重配次数； 其中所述频语有效时间指当前小区从当前时刻开 始到退出当前工作频谱的时刻的时间长度； 所述重配时延指当前小区完成重 配过程需要的时间； 所述平均重配次数指预设时间段内的重配次数。
优选地， 所述目标基站处理模块设置为： 根据所述目标小区的重配相关 信息对所述用户设备进行切换控制， 包括：
所述目标基站处理模块判断所述目标小区的频谱有效时间是否大于频谱 有效时间阔值， 当所述目标小区的频语有效时间大于频语有效时间阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者 所述目标基站处理模块判断所述目标小区的重配时延是否小于用户设备 业务要求的重配时延阔值， 当所述目标小区的重配时延小于用户设备业务要 求的重配时延阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目 标小区的切换； 或者
所述目标基站处理模块判断所述目标小区的平均重配次数是否小于平均 重配次数阔值， 当所述目标小区的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者 所述目标基站处理模块判断所述目标小区的频谱有效时间是否大于频谱 有效时间阔值， 当所述目标小区的频语有效时间大于频语有效时间阔值时， 判断所述目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当所述目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 对所 述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者
所述目标基站处理模块判断所述目标小区的频谱有效时间是否大于频谱 有效时间阔值， 当所述目标小区的频语有效时间大于频语有效时间阔值时， 判断所述目标小区的平均重配次数是否小于平均重配次数阔值， 当所述目标 小区的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接纳控 制， 以完成用户设备向目标小区的切换； 或者
所述目标基站处理模块判断所述目标小区的重配时延是否小于用户设备 业务要求的重配时延阔值， 当所述目标小区的重配时延小于用户设备业务要 求的重配时延阔值时， 判断所述目标小区的平均重配次数是否小于平均重配 次数阔值， 当所述目标小区的平均重配次数小于平均重配次数阔值时， 对所 述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者 所述目标基站处理模块判断所述目标小区的频谱有效时间是否大于频谱 有效时间阔值， 当所述目标小区的频语有效时间大于频语有效时间阔值时， 判断所述目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当所述目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 判断 所述目标小区的平均重配次数是否小于平均重配次数阔值， 当所述目标小区 的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标小区的切换。
釆用本申请技术方案， 对用户设备的小区切换过程进行控制， 能够尽量 将用户设备切换到合适的目标小区， 具体解决了 UE切换过程中由于目标小 区发生频谱资源重配而导致的切换失败的问题， 以及 UE切换到目标小区后 由于目标小区发生频谱资源重配而导致的 UE业务中断和频繁切换问题。 附图概述
此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的 不当限定。 在附图中：
图 1是本发明实施例 1源基站实现切换控制的方法流程图；
图 2是本发明实施例 1切换控制装置结构示意图；
图 3是本发明实施例 2目标基站实现切换控制的方法流程图； 图 4是本发明实施例 2切换控制装置结构示意图；
图 5是本发明应用示例 1源 eNB根据目标小区的频语有效时间实现切换 控制方法的流程示意图；
图 6是本发明应用示例 2源 eNB根据目标小区的频语有效时间和重配时 延实现切换控制的流程示意图；
图 7是本发明应用示例 3源 eNB根据目标小区的频语有效时间和平均重 配次数实现切换控制的流程示意图；
图 8是本发明应用示例 4源 eNB根据目标小区的频语有效时间、重配时 延和平均重配次数实现切换控制的流程示意图；
图 9是本发明应用示例 5目标 eNB根据目标小区的频谱有效时间实现切 换控制的流程示意图；
图 10是本发明应用示例 6目标 eNB根据目标小区的频语有效时间和重 配时延实现切换控制方法的优选实施例六的流程示意图；
图 11是本发明应用示例 7 目标 eNB根据目标小区的频语有效时间和平 均重配次数实现切换控制的流程示意图；
图 12是本发明应用示例 8目标 eNB根据目标小区的频语有效时间、 重 配时延和平均重配次数实现切换控制的流程示意图。
本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互任意组合。
实施例 1
本实施例描述由源基站实现的切换控制方法， 流程如图 1所示， 包括： 步骤 101 , 源基站接收用户设备发送的测量报告；
在此之前， 该过程还包括， 用户设备按照基站（源基站） 的测量配置进 行测量， 然后按照测量配置中的测量结果上报方式， 向基站上报测量结果， 这些过程都是现有技术， 此处不再累述。
步骤 102, 源基站根据所述测量报告、 无线资源管理信息和重配相关信 息对用户设备进行切换控制。
具体地， 源基站根据测量报告、 无线资源管理信息确定候选目标小区， 根据候选目标小区的重配相关信息对该用户设备进行切换控制。
上述重配相关信息包括以下内容一项或多项：频谱有效时间 ,重配时延， 平均重配次数； 其中：
所述频谱有效时间指当前小区从当前时刻开始到退出当前工作频谱的时 刻的时间长度； 具体地， 退出当前工作频谱的时刻可以由小区所属基站从数 据库获取该频谱时同时获取， 也可以由小区所属基站根据对该频谱的感知结 果统计预测获得， 也可以是无线资源优化时管理者设定的；
所述重配时延指当前小区从资源重配开始到重配完成所需要的时间， 即 当前小区完成重配过程需要的时间， 可以是根据先前的重配时延得到的统计 值；
所述平均重配次数指预设时间段内的重配次数， 可以根据先前小区重配 次数的统计规律得到， 例如过去 24小时内的重配次数；
根据重配相关信息内容的不同， 源基站根据重配相关信息进行的切换控 制也有所不同， 下面进行具体说明：
场景 1 , 重配相关信息仅包括频语有效时间时， 源基站根据测量报告、 无线资源管理信息按照现有技术确定候选目标小区后， 判断候选目标小区的 频语有效时间是否大于频语有效时间阔值， 当候选目标小区的频语有效时间 大于频谱有效时间阔值时， 源基站选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 之后按照现有协议规定的 流程执行， 以完成用户设备向目标小区的切换； 通过在切换时参考频语有效 时间，可以保证用户设备向目标小区切换的过程中，目标小区不会发生重配， 即保证用户设备在目标小区重配之前完成切换， 从而避免切换失败； 场景 2, 重配相关信息仅包括重配时延时， 源基站根据测量报告、 无线 资源管理信息按照现有技术确定候选目标小区后， 判断候选目标小区的重配 时延是否小于用户设备业务要求的重配时延阔值， 当候选目标小区的重配时 延小于用户设备业务要求的重配时延阔值时， 源基站选择该候选目标小区为 切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 之后按 照现有协议规定的流程执行， 以完成用户设备向目标小区的切换； 通过在切 换时参考重配时延， 可以保证用户设备切换到目标小区后， 目标小区的重配 时延不会导致用户设备业务中断；
场景 3 , 重配相关信息仅包括平均重配次数时， 源基站根据测量报告、 无线资源管理信息按照现有技术确定候选目标小区后， 判断候选目标小区的 平均重配次数是否小于平均重配次数阔值， 当候选目标小区的平均重配次数 小于平均重配次数阔值时， 源基站选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 之后按照现有协议规定的 流程执行， 以完成用户设备向目标小区的切换； 通过在切换时参考平均重配 次数， 可以保证用户设备切换到目标小区后， 用户设备的切换频率（重配频 率） 不会太高， 即降低切换频率；
场景 4, 重配相关信息包括频语有效时间和重配时延时， 源基站根据测 量报告、 无线资源管理信息按照现有技术确定候选目标小区后， 判断候选目 标小区的频语有效时间是否大于频谱有效时间阔值， 当候选目标小区的频谱 有效时间大于频语有效时间阔值时， 进一步判断候选目标小区的重配时延是 否小于用户设备业务要求的重配时延阔值， 当候选目标小区的重配时延小于 用户设备业务要求的重配时延阔值时， 源基站选择该候选目标小区为切换的 目标小区， 向该目标小区所属的目标基站发送切换请求消息， 之后按照现有 协议规定的流程执行， 以完成用户设备向目标小区的切换；
场景 5 , 重配相关信息包括频语有效时间和平均重配次数时， 源基站根 据测量报告、 无线资源管理信息按照现有技术确定候选目标小区后， 判断候 选目标小区的频语有效时间是否大于频语有效时间阔值， 当候选目标小区的 频语有效时间大于频谱有效时间阔值时， 进一步判断候选目标小区的平均重 配次数是否小于平均重配次数阔值， 当候选目标小区的平均重配次数小于平 均重配次数阔值时， 源基站选择该候选目标小区为切换的目标小区， 向该目 标小区所属的目标基站发送切换请求消息， 之后按照现有协议规定的流程执 行， 以完成用户设备向目标小区的切换；
场景 6, 重配相关信息包括重配时延和平均重配次数时， 源基站根据测 量报告、 无线资源管理信息按照现有技术确定候选目标小区后， 判断候选目 标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当候选目标 小区的重配时延小于用户设备业务要求的重配时延阔值时， 进一步判断候选 目标小区的平均重配次数是否小于平均重配次数阔值， 当候选目标小区的平 均重配次数小于平均重配次数阔值时， 源基站选择该候选目标小区为切换的 目标小区， 向该目标小区所属的目标基站发送切换请求消息， 之后按照现有 协议规定的流程执行， 以完成用户设备向目标小区的切换；
场景 7 ,重配相关信息包括频谱有效时间，重配时延和平均重配次数时， 源基站根据测量报告、无线资源管理信息按照现有技术确定候选目标小区后， 判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选目标 小区的频语有效时间大于频谱有效时间阔值时， 进一步， 源基站判断候选目 标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当候选目标 小区的重配时延小于用户设备业务要求的重配时延阔值时， 进一步， 源基站 判断候选目标小区的平均重配次数是否小于平均重配次数阔值， 当候选目标 小区的平均重配次数小于平均重配次数阔值时， 源基站选择该候选目标小区 为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 之后 按照现有协议规定的流程执行， 以完成用户设备向目标小区的切换。
上述切换请求消息的内容、 格式都为现有技术的沿用， 此处不再赘述。 候选目标小区的重配相关信息可以由源基站从候选目标小区所属基站获 取。 另外， 如果源基站可以从自身维护的邻区信息列表中获取候选目标小区 的重配相关信息，则源基站就不必从候选目标小区所属的基站获取这些信息。
上述频谱有效时间阔值、 重配时延阔值及平均重配次数阔值可以根据网 络的实际情况或管理需要进行更改并预先设置； 另外重配时延阔值的选择与 用户设备正在进行的业务有关， 例如用户设备正在进行语音业务， 则重配时 延阔值可选择 100毫秒； 用户设备正在进行实时游戏， 则重配时延阔值可选 择 50毫秒。
实现上述方法的位于源基站的切换控制装置， 如图 2所示， 包括接收模 块 201和切换控制模块 202 , 其中：
接收模块 201 , 用于接收用户设备发送的测量报告；
切换控制模块 202, 用于根据该测量报告、 无线资源管理信息以及重配 相关信息对该用户设备进行切换控制。
在一优选实施例中， 该切换控制模块包括候选目标小区确定单元 2021 和切换控制单元 2022 , 其中：
该候选目标小区确定单元， 用于根据该测量^艮告、 无线资源管理信息确 定候选目标小区； 该切换控制单元， 用于根据候选目标小区的重配相关信息对该用户设备 进行切换控制。
切换控制单元对用户设备的具体切换控制内容参见上述场景 1-场景 7 , 此处不再赘述。
实施例 2
本实施例描述由目标基站实现的切换控制方法， 流程如图 3所示， 具体 包括：
步骤 301 , 源基站接收用户设备发送的测量报告；
步骤 302, 源基站根据所述测量报告和无线资源管理信息确定目标小区， 向目标基站发送切换请求消息；
步骤 303 , 目标基站收到所述切换请求消息后， 根据目标小区的重配相 关信息对该用户设备进行切换控制。
上述重配相关信息包括的内容参见实施例 1中描述。
根据重配相关信息内容的不同， 目标基站根据目标小区的重配相关信息 进行的切换控制也有所不同， 下面进行具体说明：
场景 1 , 重配相关信息仅包括频语有效时间时， 目标基站收到源基站的 切换请求消息后，判断目标小区的频语有效时间是否大于频语有效时间阔值， 当目标小区的频语有效时间大于频谱有效时间阔值时， 目标基站按照现有技 术做接纳控制 （AC, Admission Control ) , 之后按照现有协议规定的流程完 成切换， 最终完成用户设备向目标小区的切换， 当判断条件不满足时， 目标 基站可向源基站发送切换准备失败消息， 源基站收到切换准备失败消息后按 照现有协议规定的流程处理； 通过在切换时参考频语有效时间， 可以保证用 户设备向目标小区切换的过程中， 目标小区不会发生重配， 即保证用户设备 在目标小区重配之前完成切换， 从而避免切换失败；
场景 2, 重配相关信息仅包括重配时延时， 目标基站收到源基站的切换 请求消息后， 判断目标小区的重配时延是否小于用户设备业务要求的重配时 延阔值， 当目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 目标基站按照现有技术做接纳控制，之后按照现有协议规定的流程完成切换， 最终完成用户设备向目标小区的切换， 当判断条件不满足时， 目标基站可向 源基站发送切换准备失败消息， 源基站收到切换准备失败消息后按照现有协 议规定的流程处理； 通过在切换时参考重配时延， 可以保证用户设备切换到 目标小区后， 目标小区的重配时延不会导致用户设备业务中断；
场景 3 , 重配相关信息仅包括平均重配次数时， 目标基站收到源基站的 切换请求消息后，判断目标小区的平均重配次数是否小于平均重配次数阔值， 当目标小区的平均重配次数小于平均重配次数阔值时， 目标基站按照现有技 术做接纳控制， 之后按照现有协议规定的流程完成切换， 最终完成用户设备 向目标小区的切换， 当判断条件不满足时， 目标基站可向源基站发送切换准 备失败消息 ,源基站收到切换准备失败消息后按照现有协议规定的流程处理； 通过在切换时参考平均重配次数， 可以保证用户设备切换到目标小区后， 用 户设备的切换频率（重配频率） 不会太高， 即降低切换频率；
场景 4, 重配相关信息包括频语有效时间和重配时延时， 目标基站收到 源基站的切换请求消息后， 先判断目标小区的频语有效时间是否大于频语有 效时间阔值， 当目标小区的频语有效时间大于频语有效时间阔值时， 进一步 判断目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当目 标小区的重配时延小于用户设备业务要求的重配时延阔值时， 目标基站按照 现有技术做接纳控制， 之后按照现有协议规定的流程完成切换， 最终完成用 户设备向目标小区的切换， 当上述判断条件至少一个不满足时， 目标基站可 向源基站发送切换准备失败消息， 源基站收到切换准备失败消息后按照现有 协议规定的流程处理；
场景 5 , 重配相关信息包括频语有效时间和平均重配次数时， 目标基站 收到源基站的切换请求消息后， 先判断目标小区的频谱有效时间是否大于频 语有效时间阔值， 当目标小区的频语有效时间大于频语有效时间阔值时， 进 一步判断目标小区的平均重配次数是否小于平均重配次数阔值， 当目标小区 的平均重配次数小于平均重配次数阔值时， 目标基站按照现有技术做接纳控 制， 之后按照现有协议规定的流程完成切换， 最终完成用户设备向目标小区 的切换， 当上述判断条件至少一个不满足时， 目标基站可向源基站发送切换 准备失败消息， 源基站收到切换准备失败消息后按照现有协议规定的流程处 理；
场景 6, 重配相关信息包括重配时延和平均重配次数时， 目标基站收到 源基站的切换请求消息后， 先判断目标小区的重配时延是否小于用户设备业 务要求的重配时延阔值， 当目标小区的重配时延小于用户设备业务要求的重 配时延阔值时， 进一步判断目标小区的平均重配次数是否小于平均重配次数 阔值， 当目标小区的平均重配次数小于平均重配次数阔值时， 目标基站按照 现有技术做接纳控制， 之后按照现有协议规定的流程完成切换， 最终完成用 户设备向目标小区的切换， 当上述判断条件至少一个不满足时， 目标基站可 向源基站发送切换准备失败消息， 源基站收到切换准备失败消息后按照现有 协议规定的流程处理；
场景 7 ,重配相关信息包括频谱有效时间，重配时延和平均重配次数时， 目标基站收到源基站的切换请求消息后， 首先判断目标小区的频语有效时间 是否大于频语有效时间阔值， 当目标小区的频谱有效时间大于频语有效时间 阔值时， 进一步判断目标小区的重配时延是否小于用户设备业务要求的重配 时延阔值，当目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 进一步判断目标小区的平均重配次数是否小于平均重配次数阔值， 当目标小 区的平均重配次数小于平均重配次数阔值时， 目标基站按照现有技术做接纳 控制， 之后按照现有协议规定的流程完成切换， 最终完成用户设备向目标小 区的切换， 当上述判断条件至少一个不满足时， 目标基站可向源基站发送切 换准备失败消息， 源基站收到切换准备失败消息后按照现有协议规定的流程 处理。
上述切换准备失败消息包含切换失败的原因，包括以下任意一种或几种： 目标小区频语有效时间不满足、 重配时延不满足、 平均重配次数不满足。
上述频语有效时间阔值、 重配时延阔值及平均重配次数阔值可以根据网 络的实际情况或管理需要进行更改并预先设置； 另外重配时延阔值的选择与 用户设备正在进行的业务有关， 例如用户设备正在进行语音业务， 则重配时 延阔值可选择 100毫秒； 用户设备正在进行实时游戏， 则重配时延阔值可选 择 50毫秒。 实现上述方法的切换控制装置， 如图 4所示， 位于基站， 包括源基站处 理模块 401和目标基站处理模块 402。 该切换控制装置位于基站， 当该基站 作为源基站时， 由源基站处理模块 401主导， 当该基站作为目标基站时， 由 目标基站处理模块 402主导， 对于一个基站来说， 其可能同时作为源基站和 目标基站。 图中：
该源基站处理模块 401 , 用于在该基站为源基站时， 接收用户设备发送 的测量报告， 根据所述测量报告、 无线资源管理信息确定目标小区， 向目标 基站发送切换请求消息；
该目标基站处理模块 402, 用于在该基站为目标基站时， 在收到所述切 换请求消息后， 根据所述目标小区的重配相关信息对所述用户设备进行切换 控制。
目标基站处理模块 402对用户设备的具体切换控制内容参见上述场景 1- 场景 7 , 此处不再赘述。
下面通过应用示例对上述实施例方法进行详细说明， 其中应用示例 1-4 为由源基站执行的切换控制， 应用示例 4-8为由目标基站执行的切换控制。 以下应用示例仅对部分场景举例说明， 本领域技术人员结合上述实施例及以 下应用示例可以推导出未举例场景的实现。
以下应用示例中， 以 LTE系统 X2口切换为例来描述具体实现。 以下切 换控制方法沿用了现有 LTE系统中网络侧 eNB( enhanced Node Base Station ) 控制 UE( User Equipment )端辅助的切换控制结构，而移动性管理实体（ ΜΜΕ, Mobility Management Entity ) 不参与切换控制而只是负责用户面数据流的发 送以及路径转移。
应用示例 1
本示例描述源 eNB根据目标小区的频谱有效时间实现切换控制的流程， 如图 5所示， 包括以下步骤：
步骤 501、 UE根据协议中规定的测量触发条件， 完成指定信号的测量并 向源 eNB发送 "测量 4艮告" ( MEASUREMENT REPORT ) ；
步骤 502、源 eNB根据"测量报告"和无线资源管理（ RRM, Radio Resource Management )信息确定候选目标小区；
这里， 源基站确定候选目标小区的过程与现有技术中源基站确定目标小 区的过程相同， 此处不再累述。
步骤 503、源 eNB从候选目标小区所属的目标 eNB获取候选目标小区的 频谱有效时间；
具体地， 源 eNB向候选目标小区所属的目标 eNB发送频语有效时间请 求消息， 候选目标小区所属的目标 eNB向源 eNB发送频语有效时间响应消 息， 其中频语有效时间响应消息包含候选目标小区的退出当前工作频谱的时 刻，源 eNB需要根据候选目标小区的退出当前工作频谱的时刻计算得到候选 目标小区的频谱有效时间， 即候选目标小区从当前时刻开始到退出其当前工 作频谱时持续使用当前工作频谱的时间长度；
值得说明的是，如果源 eNB可以从自身维护的邻区信息列表中获取候选 目标小区的频谱有效时间信息，则源 eNB就不必从候选目标小区所属的目标 eNB获取该信息， 直接从邻区信息列表中获取该信息即可；
步骤 504、 源 eNB根据候选目标小区的频语有效时间对 UE进行切换控 制；
以频谱有效时间阔值为 1分钟为例，假设源 eNB根据"测量报告"消息、 无线资源管理信息确定 Celll 为候选目标小区， Celll 的当前工作的 TVWS 频语有效时间为 1.5分钟，此时 Celll的频语有效时间大于频语有效时间阔值 1分钟， 因此源 eNB选择 Celll为目标小区；
步骤 505、 源 eNB向选择的目标小区所属的目标 eNB发送切换请求，之 后按现有 LTE协议规定的切换流程执行，最终完成用户设备向目标小区的切 换。
这里，切换请求消息的内容、格式都为现有技术的沿用，此处不再赘述。
应用示例 2 本示例描述源 eNB 根据目标小区的频语有效时间和重配时延实现切换 控制的流程。 如图 6所示， 包括以下步骤：
步骤 601-602与步骤 501-502相同， 这里不再累述。
步骤 603、源 eNB从候选目标小区所属的目标 eNB获取候选目标小区的 频谱有效时间和重配时延；
具体地， 源 eNB向候选目标小区所属的目标 eNB发送切换控制信息请 求消息， 候选目标小区所属的目标 eNB向源 eNB发送切换控制信息响应消 息， 其中切换控制信息响应消息包含候选目标小区的退出当前工作频谱的时 刻及重配时延，源 eNB需要根据候选目标小区的退出当前工作频谱的时刻计 算得到候选目标小区的频语有效时间， 即候选目标小区从当前时刻开始到退 出其当前工作频谱时持续使用当前工作频谱的时间长度；
值得说明的是，如果源 eNB可以从自身维护的邻区信息列表中获取候选 目标小区的频谱有效时间和重配时延信息，则源 eNB就不必从候选目标小区 所属的目标 eNB获取该信息， 直接从邻区信息列表中获取该信息即可； 步骤 604、 源 eNB根据候选目标小区的频语有效时间和重配时延对 UE 进行切换控制；
以频语有效时间阔值和重配时延阔值分别为 1分钟和 100毫秒（UE为 语音业务， 因此重配时延阔值选择 100毫秒）为例， 假设源 eNB根据 "测量 才艮告" 消息、 无线资源管理信息确定 Celll为候选目标小区， Celll的当前工 作的 TVWS频语有效时间为 1.5分钟， 重配时延为 90毫秒， 此时 Celll的频 语有效时间大于频语有效时间阔值 1分钟，且重配时延 90毫秒小于重配时延 阔值 100毫秒， 因此源 eNB选择 Celll为目标小区；
步骤 605、 源 eNB向选择的目标小区所属的目标 eNB发送切换请求； 之 后按现有 LTE协议规定的切换流程执行，最终完成用户设备向目标小区的切 换。
这里，切换请求消息的内容、格式都为现有技术的沿用，此处不再赘述。
应用示例 3 本示例描述源 eNB 根据目标小区的频语有效时间和平均重配次数实现 切换控制的流程。 如图 7所示， 包括以下步骤：
步骤 701-702与步骤 501-502相同， 这里不再累述。
步骤 703、源 eNB从候选目标小区所属的目标 eNB获取候选目标小区的 频语有效时间和平均重配次数；
具体地， 源 eNB向候选目标小区所属的目标 eNB发送切换控制信息请 求消息， 候选目标小区所属的目标 eNB向源 eNB发送切换控制信息响应消 息， 其中切换控制信息响应消息包含候选目标小区的退出当前工作频谱的时 刻及平均重配次数，源 eNB需要根据候选目标小区的退出当前工作频谱的时 刻计算得到候选目标小区的频语有效时间， 即候选目标小区从当前时刻开始 到退出其当前工作频谱时持续使用当前工作频谱的时间长度；
值得说明的是，如果源 eNB可以从自身维护的邻区信息列表中获取候选 目标小区的频谱有效时间和平均重配次数信息，则源 eNB就不必从候选目标 小区所属的目标 eNB获取该信息， 直接从邻区信息列表中获取该信息即可； 步骤 704、 源 eNB根据候选目标小区的频语有效时间和平均重配次数对
UE进行切换控制；
以频语有效时间阔值和平均重配次数阔值分别为 1分钟和 0.5次 /小时为 例， 假设源 eNB根据 "测量报告" 消息、 无线资源管理信息确定 Celll为候 选目标小区， Celll的当前工作的 TVWS频语有效时间为 1.5分钟，平均重配 次数为 0.2次 /小时， 此时 Celll的频语有效时间大于频语有效时间阔值 1分 钟， 且平均重配次数 0.2次 /小时小于平均重配次数阔值 0.5次 /小时， 因此源 eNB选择 Celll为目标小区；
步骤 705、 源 eNB向选择的目标小区所属的目标 eNB发送切换请求； 之 后按现有 LTE协议规定的切换流程执行，最终完成用户设备向目标小区的切 换。
这里，切换请求消息的内容、格式都为现有技术的沿用，此处不再赘述。
应用示例 4 本示例描述源 eNB根据目标小区的频谱有效时间、重配时延和平均重配 次数实现切换控制的流程。 如图 8所示， 包括以下步骤：
步骤 801-802与步骤 501-502相同， 这里不再累述。
步骤 803、源 eNB从候选目标小区所属的目标 eNB获取候选目标小区的 频语有效时间、 重配时延和平均重配次数；
具体地， 源 eNB向候选目标小区所属的目标 eNB发送切换控制信息请 求消息， 候选目标小区所属的目标 eNB向源 eNB发送切换控制信息响应消 息， 其中切换控制信息响应消息包含候选目标小区的退出当前工作频谱的时 刻、 重配时延， 及平均重配次数， 源 eNB需要根据候选目标小区的退出当前 工作频谱的时刻计算得到候选目标小区的频语有效时间， 即候选目标小区从 当前时刻开始到退出其当前工作频谱时持续使用当前工作频谱的时间长度； 值得说明的是，如果源 eNB可以从自身维护的邻区信息列表中获取候选 目标小区的频语有效时间、 重配时延和平均重配次数信息， 则源 eNB就不必 从候选目标小区所属的目标 eNB获取该信息，直接从邻区信息列表中获取该 信息即可；
步骤 804、 源 eNB根据候选目标小区的频语有效时间、 重配时延和平均 重配次数对 UE进行切换控制；
以频语有效时间阔值、重配时延阔值和平均重配次数阔值分别为 1分钟、 100毫秒和 0.5次 /小时为例， 假设源 eNB根据 "测量报告" 消息、 无线资源 管理信息确定 Celll为候选目标小区， Celll的当前工作的 TVWS频语有效时 间为 1.5分钟， 重配时延为 90毫秒， 平均重配次数为 0.2次 /小时， 重配时延 为 90毫秒， 此时 Celll的频语有效时间大于频语有效时间阔值 1分钟， 且重 配时延 90毫秒小于重配时延阔值 100毫秒， 且平均重配次数 0.2次 /小时小 于平均重配次数阔值 0.5次 /小时， 因此源 eNB选择 Celll为目标小区；
步骤 805、 源 eNB向选择的目标小区所属的目标 eNB发送切换请求； 之 后按现有 LTE协议规定的切换流程执行，最终完成用户设备向目标小区的切 换。
这里，切换请求消息的内容、格式都为现有技术的沿用，此处不再赘述。 应用示例 5
本示例描述目标 eNB 根据目标小区的频谱有效时间实现切换控制的流 程。 如图 9所示， 包括以下步骤：
步骤 901-902与步骤 501-502相同， 这里不再累述。
步骤 903、 源 eNB向目标小区所属的目标 eNB发送切换请求消息； 其中，切换请求消息的内容、格式都为现有技术的沿用，此处不再累述； 步骤 904、 目标 eNB收到源 eNB的切换请求消息后，根据目标小区的频 语有效时间对 UE进行切换控制；
以频语有效时间阔值为 1分钟为例， 4叚设 Celll为目标小区， Celll的当 前工作的 TVWS频语有效时间为 1.5分钟， 此时 Celll的频语有效时间大于 频语有效时间阔值 1分钟，因此可以保证 UE切换到目标小区 Celll的过程中 目标小区不会进行频谱重配， 即不会由于目标小区的频谱重配导致 UE切换 失败；
步骤 905、目标 eNB按照现有技术做接纳控制（ AC, Admission Control ), 之后按现有 LTE协议规定的切换流程执行，最终完成用户设备向目标小区的 切换。
应用示例 6
本示例描述目标 eNB 根据目标小区的频谱有效时间和重配时延实现切 换控制的流程。 如图 10所示， 包括以下步骤：
步骤 1001-1003与步骤 901-903相同， 这里不再累述。
步骤 1004、 目标 eNB收到源 eNB的切换请求消息后， 根据目标小区的 频语有效时间和重配时延对 UE进行切换控制；
以频语有效时间阔值和重配时延阔值分别为 1分钟和 100毫秒（UE为 语音业务， 因此重配时延阔值选择 100毫秒）为例，假设 Celll为目标小区， Celll的当前工作的 TVWS频语有效时间为 1.5分钟， 重配时延为 90毫秒， 此时 Celll的频语有效时间大于频语有效时间阔值 1分钟， 且重配时延 90毫 秒小于重配时延阔值 100毫秒， 因此可以保证 UE切换到目标小区 Celll后， 不会因为目标小区的频谱重配时延过长而导致 UE掉线；
步骤 1005、 目标 eNB按照现有技术做接纳控制， 之后按现有 LTE协议 规定的切换流程执行， 最终完成用户设备向目标小区的切换。
应用示例 7
本示例描述目标 eNB 根据目标小区的频谱有效时间和平均重配次数实 现切换控制的流程。 如图 11所示， 包括以下步骤：
步骤 1101-1103与步骤 901-903相同， 这里不再累述。
步骤 1104、 目标 eNB收到源 eNB的切换请求消息后， 根据目标小区的 频语有效时间和平均重配次数对 UE进行切换控制；
以频语有效时间阔值和平均重配次数阔值分别为 1分钟和 0.5次 /小时为 例， 假设 Celll为目标小区， Celll的当前工作的 TVWS频语有效时间为 1.5 分钟， 平均重配次数为 0.2次 /小时， 此时 Celll的频语有效时间大于频语有 效时间阔值 1分钟， 且平均重配次数 0.2次 /小时小于平均重配次数阔值 0.5 次 /小时， 因此可以保证 UE切换到目标小区 Celll后， 不会因为目标小区的 频繁重配而影响 UE用户体验；
步骤 1105、 目标 eNB按照现有技术做接纳控制， 之后按现有 LTE协议 规定的切换流程执行， 最终完成用户设备向目标小区的切换。
应用示例 8
本示例描述目标 eNB根据目标小区的频语有效时间、重配时延和平均重 配次数实现切换控制的流程。 如图 12所示， 包括以下步骤：
步骤 1201-1203与步骤 901-903相同， 这里不再累述。
步骤 1204、 目标 eNB收到源 eNB的切换请求消息后， 根据目标小区的 频谱有效时间、 重配时延和平均重配次数对 UE进行切换控制； 以频语有效时间阔值、重配时延阔值和平均重配次数阔值分别为 1分钟、
100 毫秒和 0.5 次 /小时为例， 4叚设 Celll 为目标小区， Celll 的当前工作的 TVWS频语有效时间为 1.5分钟， 重配时延为 90毫秒， 平均重配次数为 0.2 次 /小时，重配时延为 90毫秒，此时 Celll的频语有效时间大于频语有效时间 阔值 1分钟，且重配时延 90毫秒小于重配时延阔值 100毫秒，且平均重配次 数 0.2次 /小时小于平均重配次数阔值 0.5次 /小时， 因此可以保证 UE切换到 目标小区 Celll后， 不会因为目标小区的频谱重配时延过长而导致 UE掉线， 也不会因为目标小区的频繁重配而影响 UE用户体验；
步骤 1205、 目标 eNB按照现有技术做接纳控制， 并按现有 LTE协议规 定的切换流程执行， 最终完成用户设备向目标小区的切换。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保护 范围。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
釆用本申请技术方案， 对用户设备的小区切换过程进行控制， 能够尽量 将用户设备切换到合适的目标小区， 具体解决了 UE切换过程中由于目标小 区发生频谱资源重配而导致的切换失败的问题， 以及 UE切换到目标小区后 由于目标小区发生频谱资源重配而导致的 UE业务中断和频繁切换问题。

Claims

权 利 要 求 书
1、 一种认知无线电系统中的切换控制方法， 包括：
源基站接收用户设备发送的测量报告；
源基站根据所述测量报告、 无线资源管理信息以及重配相关信息对所述 用户设备进行切换控制。
2、 如权利要求 1所述的方法， 其中，
所述源基站根据所述测量报告、 无线资源管理信息以及重配相关信息对 所述用户设备进行切换控制， 包括：
所述源基站根据所述测量报告、 无线资源管理信息确定候选目标小区， 根据候选目标小区的重配相关信息对所述用户设备进行切换控制。
3、 如权利要求 2所述的方法， 其中，
所述重配相关信息包括以下内容的一种或多种： 频语有效时间， 重配时 延， 平均重配次数； 其中： 所述频谱有效时间指当前小区从当前时刻开始到 退出当前工作频语的时刻的时间长度； 所述重配时延指当前小区完成重配过 程需要的时间； 所述平均重配次数指预设时间段内的重配次数；
其中， 所述候选目标小区的重配相关信息由源基站从候选目标小区所属 基站获取。
4、 如权利要求 3所述的方法， 其中，
所述根据候选目标小区的重配相关信息对所述用户设备进行切换控制， 包括：
判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选 目标小区的频谱有效时间大于频语有效时间阔值时， 源基站选择该候选目标 小区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
判断候选目标小区的重配时延是否小于用户设备业务要求的重配时延阔 值， 当候选目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 源基站选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标基 站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者 判断候选目标小区的平均重配次数是否小于平均重配次数阔值， 当候选 目标小区的平均重配次数小于平均重配次数阔值时， 源基站选择该候选目标 小区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选 目标小区的频谱有效时间大于频语有效时间阔值时， 判断候选目标小区的重 配时延是否小于用户设备业务要求的重配时延阔值， 当候选目标小区的重配 时延小于用户设备业务要求的重配时延阔值时， 源基站选择该候选目标小区 为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完 成用户设备向目标小区的切换； 或者
判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选 目标小区的频谱有效时间大于频语有效时间阔值时， 判断候选目标小区的平 均重配次数是否小于平均重配次数阔值， 当候选目标小区的平均重配次数小 于平均重配次数阔值时， 源基站选择该候选目标小区为切换的目标小区， 向 该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区 的切换； 或者
判断候选目标小区的重配时延是否小于用户设备业务要求的重配时延阔 值， 当候选目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 判断候选目标小区的平均重配次数是否小于平均重配次数阔值， 当候选目标 小区的平均重配次数小于平均重配次数阔值时， 源基站选择该候选目标小区 为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完 成用户设备向目标小区的切换； 或者
判断候选目标小区的频语有效时间是否大于频谱有效时间阔值， 当候选 目标小区的频谱有效时间大于频语有效时间阔值时， 判断候选目标小区的重 配时延是否小于用户设备业务要求的重配时延阔值， 当候选目标小区的重配 时延小于用户设备业务要求的重配时延阔值时， 判断候选目标小区的平均重 配次数是否小于平均重配次数阔值， 当候选目标小区的平均重配次数小于平 均重配次数阔值时， 源基站选择该候选目标小区为切换的目标小区， 向该目 标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区的切 换。
5、 一种认知无线电系统中的切换控制方法， 包括：
源基站接收用户设备发送的测量报告；
源基站根据所述测量报告、 无线资源管理信息确定目标小区， 向目标基 站发送切换请求消息；
目标基站收到所述切换请求消息后， 根据所述目标小区的重配相关信息 对所述用户设备进行切换控制。
6、 如权利要求 5所述的方法， 其中，
所述重配相关信息包括以下内容的一种或多种： 频语有效时间， 重配时 延， 平均重配次数； 其中： 所述频谱有效时间指当前小区从当前时刻开始到 退出当前工作频语的时刻的时间长度； 所述重配时延指当前小区完成重配过 程需要的时间； 所述平均重配次数指预设时间段内的重配次数。
7、 如权利要求 6所述的方法， 其中，
所述根据所述目标小区的重配相关信息对所述用户设备进行切换控制， 包括：
判断所述目标小区的频语有效时间是否大于频谱有效时间阔值， 当所述 目标小区的频谱有效时间大于频语有效时间阔值时， 对所述用户设备进行接 纳控制， 以完成用户设备向目标小区的切换； 或者
判断所述目标小区的重配时延是否小于用户设备业务要求的重配时延阔 值， 当所述目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者 判断所述目标小区的平均重配次数是否小于平均重配次数阔值， 当所述 目标小区的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接 纳控制， 以完成用户设备向目标小区的切换； 或者
判断所述目标小区的频语有效时间是否大于频谱有效时间阔值， 当所述 目标小区的频谱有效时间大于频语有效时间阔值时， 判断所述目标小区的重 配时延是否小于用户设备业务要求的重配时延阔值， 当所述目标小区的重配 时延小于用户设备业务要求的重配时延阔值时， 对所述用户设备进行接纳控 制， 以完成用户设备向目标小区的切换； 或者
判断所述目标小区的频语有效时间是否大于频谱有效时间阔值， 当所述 目标小区的频谱有效时间大于频语有效时间阔值时， 判断所述目标小区的平 均重配次数是否小于平均重配次数阔值， 当所述目标小区的平均重配次数小 于平均重配次数阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向 目标小区的切换； 或者
判断所述目标小区的重配时延是否小于用户设备业务要求的重配时延阔 值， 当所述目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 判断所述目标小区的平均重配次数是否小于平均重配次数阔值， 当所述目标 小区的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接纳控 制， 以完成用户设备向目标小区的切换； 或者
判断所述目标小区的频语有效时间是否大于频谱有效时间阔值， 当所述 目标小区的频谱有效时间大于频语有效时间阔值时， 判断所述目标小区的重 配时延是否小于用户设备业务要求的重配时延阔值， 当所述目标小区的重配 时延小于用户设备业务要求的重配时延阔值时， 判断所述目标小区的平均重 配次数是否小于平均重配次数阔值， 当所述目标小区的平均重配次数小于平 均重配次数阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标 小区的切换。
8、一种认知无线电系统中的切换控制装置，位于源基站，包括接收模块、 切换控制模块， 其中：
所述接收模块， 设置为： 接收用户设备发送的测量报告；
所述切换控制模块， 设置为： 根据所述测量报告、 无线资源管理信息以 及重配相关信息对所述用户设备进行切换控制。
9、 如权利要求 8所述的装置， 其中，
所述切换控制模块包括候选目标小区确定单元和切换控制单元， 其中： 所述候选目标小区确定单元， 设置为： 根据所述测量报告、 无线资源管 理信息确定候选目标小区； 所述切换控制单元， 设置为： 根据候选目标小区的重配相关信息对所述 用户设备进行切换控制。
10、 如权利要求 9所述的装置， 其中，
所述重配相关信息包括以下内容的一种或多种： 频语有效时间， 重配时 延， 平均重配次数； 其中所述频语有效时间指当前小区从当前时刻开始到退 出当前工作频语的时刻的时间长度； 所述重配时延指当前小区完成重配过程 需要的时间； 所述平均重配次数指预设时间段内的重配次数； 其中， 所述候 选目标小区的重配相关信息由源基站从候选目标小区所属基站获取。
11、 如权利要求 10所述的装置， 其中，
所述切换控制单元设置为： 根据候选目标小区的重配相关信息对所述用 户设备进行切换控制， 包括：
所述切换控制单元判断候选目标小区的频语有效时间是否大于频语有效 时间阔值， 当候选目标小区的频语有效时间大于频语有效时间阔值时， 所述 切换控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的 目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的重配时延是否小于用户设备业务 要求的重配时延阔值， 当候选目标小区的重配时延小于用户设备业务要求的 重配时延阔值时，所述切换控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小 区的切换； 或者
所述切换控制单元判断候选目标小区的平均重配次数是否小于平均重配 次数阔值， 当候选目标小区的平均重配次数小于平均重配次数阔值时， 所述 切换控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的 目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的频语有效时间是否大于频语有效 时间阔值， 当候选目标小区的频语有效时间大于频语有效时间阔值时， 判断 候选目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当候 选目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 所述切换 控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标 基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的频语有效时间是否大于频语有效 时间阔值， 当候选目标小区的频语有效时间大于频语有效时间阔值时， 判断 候选目标小区的平均重配次数是否小于平均重配次数阔值， 当候选目标小区 的平均重配次数小于平均重配次数阔值时， 所述切换控制单元选择该候选目 标小区为切换的目标小区，向该目标小区所属的目标基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的重配时延是否小于用户设备业务 要求的重配时延阔值， 当候选目标小区的重配时延小于用户设备业务要求的 重配时延阔值时， 判断候选目标小区的平均重配次数是否小于平均重配次数 阔值， 当候选目标小区的平均重配次数小于平均重配次数阔值时， 所述切换 控制单元选择该候选目标小区为切换的目标小区， 向该目标小区所属的目标 基站发送切换请求消息， 以完成用户设备向目标小区的切换； 或者
所述切换控制单元判断候选目标小区的频语有效时间是否大于频语有效 时间阔值， 当候选目标小区的频语有效时间大于频语有效时间阔值时， 判断 候选目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当候 选目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 判断候选 目标小区的平均重配次数是否小于平均重配次数阔值， 当候选目标小区的平 均重配次数小于平均重配次数阔值时， 所述切换控制单元选择该候选目标小 区为切换的目标小区， 向该目标小区所属的目标基站发送切换请求消息， 以 完成用户设备向目标小区的切换。
12、 一种认知无线电系统中的切换控制装置， 位于基站， 包括源基站处 理模块和目标基站处理模块， 其中：
所述源基站处理模块， 设置为： 在所述基站为源基站时， 接收用户设备 发送的测量 告， 根据所述测量 告、 无线资源管理信息确定目标小区， 向 目标基站发送切换请求消息；
所述目标基站处理模块， 设置为： 在所述基站为目标基站时， 在收到所 述切换请求消息后， 根据所述目标小区的重配相关信息对所述用户设备进行 切换控制。
13、 如权利要求 12所述的装置， 其中，
所述重配相关信息包括以下内容的一种或多种： 频语有效时间， 重配时 延， 平均重配次数； 其中所述频语有效时间指当前小区从当前时刻开始到退 出当前工作频语的时刻的时间长度； 所述重配时延指当前小区完成重配过程 需要的时间； 所述平均重配次数指预设时间段内的重配次数。
14、 如权利要求 13所述的装置， 其中，
所述目标基站处理模块设置为： 根据所述目标小区的重配相关信息对所 述用户设备进行切换控制， 包括：
所述目标基站处理模块判断所述目标小区的频谱有效时间是否大于频谱 有效时间阔值， 当所述目标小区的频语有效时间大于频语有效时间阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者 所述目标基站处理模块判断所述目标小区的重配时延是否小于用户设备 业务要求的重配时延阔值， 当所述目标小区的重配时延小于用户设备业务要 求的重配时延阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目 标小区的切换； 或者
所述目标基站处理模块判断所述目标小区的平均重配次数是否小于平均 重配次数阔值， 当所述目标小区的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者 所述目标基站处理模块判断所述目标小区的频谱有效时间是否大于频谱 有效时间阔值， 当所述目标小区的频语有效时间大于频语有效时间阔值时， 判断所述目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当所述目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 对所 述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者
所述目标基站处理模块判断所述目标小区的频谱有效时间是否大于频谱 有效时间阔值， 当所述目标小区的频语有效时间大于频语有效时间阔值时， 判断所述目标小区的平均重配次数是否小于平均重配次数阔值， 当所述目标 小区的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接纳控 制， 以完成用户设备向目标小区的切换； 或者
所述目标基站处理模块判断所述目标小区的重配时延是否小于用户设备 业务要求的重配时延阔值， 当所述目标小区的重配时延小于用户设备业务要 求的重配时延阔值时， 判断所述目标小区的平均重配次数是否小于平均重配 次数阔值， 当所述目标小区的平均重配次数小于平均重配次数阔值时， 对所 述用户设备进行接纳控制， 以完成用户设备向目标小区的切换； 或者
所述目标基站处理模块判断所述目标小区的频谱有效时间是否大于频谱 有效时间阔值， 当所述目标小区的频语有效时间大于频语有效时间阔值时， 判断所述目标小区的重配时延是否小于用户设备业务要求的重配时延阔值， 当所述目标小区的重配时延小于用户设备业务要求的重配时延阔值时， 判断 所述目标小区的平均重配次数是否小于平均重配次数阔值， 当所述目标小区 的平均重配次数小于平均重配次数阔值时， 对所述用户设备进行接纳控制， 以完成用户设备向目标小区的切换。
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