WO2014101139A1 - 电路域回落切换方法、装置和基站 - Google Patents

电路域回落切换方法、装置和基站 Download PDF

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Publication number
WO2014101139A1
WO2014101139A1 PCT/CN2012/087913 CN2012087913W WO2014101139A1 WO 2014101139 A1 WO2014101139 A1 WO 2014101139A1 CN 2012087913 W CN2012087913 W CN 2012087913W WO 2014101139 A1 WO2014101139 A1 WO 2014101139A1
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WIPO (PCT)
Prior art keywords
switching
csfb
cell
control message
measurement
Prior art date
Application number
PCT/CN2012/087913
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English (en)
French (fr)
Inventor
张启龙
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280077156.9A priority Critical patent/CN104798435B/zh
Priority to KR1020157018569A priority patent/KR101685516B1/ko
Priority to EP12891107.0A priority patent/EP2925081B1/en
Priority to PCT/CN2012/087913 priority patent/WO2014101139A1/zh
Priority to JP2015549927A priority patent/JP5994195B2/ja
Publication of WO2014101139A1 publication Critical patent/WO2014101139A1/zh
Priority to US14/748,461 priority patent/US9462510B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837Determination of triggering parameters for hand-off
    • H04W36/008375Determination of triggering parameters for hand-off based on historical data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/34Reselection control
    • H04W36/38Reselection control by fixed network equipment
    • H04W36/385Reselection control by fixed network equipment of the core network

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a CSFB (Circuit Switched Fall Back) switching method, apparatus, and base station.
  • CSFB Circuit Switched Fall Back
  • CSFB is a technology that uses other RAN (Radio Access Network) to support CS domain (circuit switched domain) calls in the LTE (Long Term Evolution) system coverage area.
  • RAN Radio Access Network
  • CS domain circuit switched domain
  • LTE Long Term Evolution
  • the CSFB process enables the CS services of user equipment, such as voice services, to be switched to relatively low bandwidth access networks, such as GSM (Global System of Mobile communication) / UMTS (Universal Mobile Telecommunications System) Communication system), etc., thereby saving operator bandwidth resources.
  • GSM Global System of Mobile communication
  • UMTS Universal Mobile Telecommunications System
  • a corresponding GSM/UMTS cell is usually configured in advance for each LTE cell.
  • the user equipment (UE) needs to use the voice service, it will switch to the LTE cell where the UE is currently located.
  • the existing CSFB switching method usually adopts blind handover. That is to say, when the UE needs to use the voice service, it directly switches to the pre-configured GSM/UMTS blind handover neighboring cell with the current LTE cell.
  • the existing CSFB handover method is applicable to overlapping coverage areas of LTE cells and GSM/UMTS cells, but does not overlap in LTE cells and GSM/UMTS cells.
  • CSFB 4 ⁇ may fail, which may cause the UE to fail to switch and cannot use the CS service.
  • embodiments of the present invention provide a CSFB switching method, apparatus, and system.
  • the technical solution is as follows:
  • an embodiment of the present invention provides a CSFB switching method, where the method includes: The eNB (eNodeB, the base station) receives the CSFB indication, and the CSFB indication indicates that the UE is handed over from the LTE cell to the 2G/3G cell to perform the CS service, where the LTE cell and the 2G/3G cell are co-located;
  • the eNB eNodeB, the base station
  • the eNB After receiving the CSFB indication, the eNB sends a measurement control message to the UE, where the measurement control message is used to instruct the UE to perform cell signal quality measurement and send a corresponding event measurement report;
  • the eNB selects to complete the CSFB handover by blind handover according to the reception condition of the event measurement report sent by the UE, or selects to complete the CSFB handover by the measurement-based handover.
  • the sending the measurement control message to the UE includes:
  • the first measurement control message is used to instruct the UE to measure the signal quality of the current LTE cell and send the first event measurement report
  • the second The measurement control message is used to instruct the UE to measure the signal quality of the current LTE cell and the 2G/3G neighboring cell of the current LTE cell and send the second event measurement report
  • the eNB selects to complete the CSFB switching by using the blind handover according to the receiving condition of the event measurement report sent by the UE, or selects to complete the CSFB switching by using the measurement-based handover, including:
  • the selecting includes: selecting, from the second event measurement report, a 2G/3G cell with the best signal quality to perform handover.
  • the sending, by the UE, the measurement control message includes:
  • the eNB selects to complete the CSFB switching by using the blind handover according to the receiving condition of the event measurement report sent by the UE, or selects to complete the CSFB switching by using the measurement-based handover, including:
  • the method further includes: When the eNB does not receive the first event measurement report within a predetermined time, the eNB sends a second measurement control message to the UE, where the second measurement control message is used to indicate that the UE measures the current LTE cell and The signal quality of the 2G/3G neighboring cell of the LTE cell and the second event measurement report is sent.
  • the switching of the CSFB is completed by the measurement-based switching, including:
  • the 2G/3G cell with the best signal quality is selected to perform handover. Specifically, the selecting completes the switching of the CSFB by using a blind handover, including:
  • an embodiment of the present invention provides a CSFB switching apparatus, where the apparatus includes: a first receiving module, configured to indicate a CSFB, where the CSFB indication indicates that the UE is handed over from the LTE cell to the 2G/3G cell for CS a service, where the LTE cell is co-located with the 2G/3G cell;
  • a sending module configured to send a measurement control message to the UE after the receiving module receives the CSFB indication, where the measurement control message is used to instruct the UE to perform cell signal quality measurement and send a corresponding event measurement report;
  • a second receiving module configured to receive an event measurement report sent by the UE
  • a switching module configured to perform, according to the receiving condition of the event measurement report sent by the UE, to complete the switching of the CSFB by using the blind handover, or to complete the switching of the CSFB by the measurement-based switching.
  • the sending module is configured to send a first measurement control message and a second measurement control message to the UE, where the first measurement control message is used to indicate that the UE measures the signal quality of the current LTE cell and sends the first
  • the second measurement control message is used to instruct the UE to measure the signal quality of the current LTE cell and the 2G/3G neighboring cell of the current LTE cell and send the second event measurement report;
  • the switching module includes:
  • a first switching unit configured to: when the second receiving module first receives the first event measurement report, complete the CSFB switching by using a blind handover;
  • a second switching unit configured to complete the switching of the CSFB by the measurement-based switching when the second receiving module first receives the second event measurement report.
  • the first switching unit is configured to: when the second receiving module receives the first The event measurement report directly switches the UE to a pre-configured blind handover neighboring cell of the current LTE cell.
  • the second switching unit is configured to select, when the second receiving module receives the second event measurement report, the 2G/3G with the best signal quality from the second event measurement report. Cell, perform handover.
  • the sending module is configured to send, to the UE, a first measurement control message, where the first measurement control message is used to instruct the UE to measure a signal quality of a current LTE cell and send the first event measurement report;
  • the switching module includes:
  • a determining unit configured to determine whether the second receiving module receives the first event measurement report within a predetermined time
  • a third switching unit configured to: when the determination result of the determining unit is YES, select to complete the switching of the CSFB by blind switching;
  • a fourth switching unit configured to: when the determination result of the determining unit is negative, select to complete the switching of the CSFB by the measurement-based switching.
  • the third switching unit is configured to directly switch the UE to a pre-configured blind handover neighboring cell of the current LTE cell.
  • the sending module is further configured to: when the determining result of the determining unit is negative, send a second measurement control message to the user equipment, where the second measurement control message is used to instruct the UE to measure the current LTE cell. And transmitting signal quality of the 2G/3G neighboring cell of the current LTE cell and transmitting a second event measurement report;
  • the fourth switching unit is configured to select, from the second event measurement report, a 2G/3G cell with the best signal quality to perform handover.
  • an embodiment of the present invention further provides a base station, where the base station includes:
  • a receiver configured to receive a CSFB indication and an event measurement report sent by the UE, where the CSFB indication indicates that the user equipment is handed over from the LTE cell to the 2G/3G cell to perform circuit domain CS service, where is the LTE cell and the The site of the base station providing the service by the 2G/3G cell is the same;
  • a processor configured to: when the receiver receives the CSFB indication, control the transmitter to send a measurement control message to the UE, and according to the receiving condition of the event measurement report sent by the receiver to the UE, The switching of the CSFB is performed by the blind handover, or the handover of the CSFB is completed by the measurement-based handover, where the measurement control message is used to instruct the UE to perform measurement of the cell signal quality and send a corresponding event measurement report.
  • the processor Preferably, the processor,
  • the second measurement control message is used to send the first measurement control message and the second measurement control message to the user equipment, where the first measurement control message is used to indicate that the user equipment measures the signal quality of the current LTE cell and sends the An event measurement, the second measurement control message is used to indicate that the user equipment measures the signal quality of the current LTE cell and the 2G/3G neighboring cell of the current LTE cell, and sends the second event measurement report;
  • selecting to complete the switching of the CSFB by blind handover For receiving the first event measurement report, selecting to complete the switching of the CSFB by blind handover; when receiving the second event measurement report, selecting to complete the CSFB switching by the measurement-based handover.
  • the processor executes instructions
  • the first measurement control message is used to send the user equipment to measure the signal quality of the current LTE cell and send the first event measurement report;
  • the eNB After receiving the CSFB indication, the eNB sends a measurement control message to the UE, and selects a handover mode according to the event measurement report sent by the UE, so as to switch the UE to the 2G/3G neighboring cell of the LTE cell, so that
  • the CSFB failure caused by the blind handover improves the probability of successful handover.
  • FIG. 2 is a flowchart of a CSFB switching method according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of a CSFB switching method according to Embodiment 2 of the present invention.
  • FIG. 4 is a flowchart of a CSFB switching method according to Embodiment 3 of the present invention.
  • FIG. 5 is a schematic structural diagram of a CSFB switching apparatus according to Embodiment 4 of the present invention.
  • FIG. 6 is a schematic structural diagram of a CSFB switching apparatus according to Embodiment 5 of the present invention.
  • FIG. 6b is a schematic structural diagram of a determining module according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic structural diagram of a CSFB switching apparatus according to Embodiment 6 of the present invention.
  • FIG. 7b is a schematic structural diagram of a judging module according to Embodiment 6 of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to Embodiment 7 of the present invention. detailed description
  • the embodiment of the present invention is applicable to a scenario in which an LTE cell and a 2G/3G cell are co-site constructed.
  • the LTE cell and the 2G/3G cell co-station construction may include at least the following situations: 1. LTE cell, GSM cell, and UMTS cell co-site construction; 2. LTE cell and GSM cell co-site construction; 3. LTE cell and UMTS Community station construction; Fourth, LTE cell and CDMA2000 (Code Division Multiple Access 2000) community station construction.
  • the application scenario of the embodiment of the present invention is described in detail below by taking the foregoing third case as an example.
  • An operator uses UMTS2100 for continuous coverage in urban areas, and coverage is very tight in traffic hotspots.
  • the operator used LTE 2600 or LTE1800 hotspots for coverage.
  • the LTE cell and the UMTS cell may be constructed using a co-site, or the same site as the base station serving the LTE cell and the 2G/3G cell.
  • the size of the LTE cell and the UMTS cell is not strictly 1:1 and the LTE cell may not be contiguous.
  • the dotted line frame in the figure represents an LTE cell
  • the solid line frame represents a UMTS cell. It can be seen from the figure that the coverage of one UMTS cell is larger than the coverage of the LTE cell constructed by the co-site.
  • Embodiment 1 provides a solution for selecting a handover mode according to the quality of the LTE cell in which the UE is currently located to solve the foregoing problem, thereby improving the success rate of the CSFB handover.
  • the embodiment of the present invention provides a CSFB handover method.
  • the method includes: Step 101: The eNB receives a CSFB indication, where the CSFB indication indicates that the UE is handed over from the LTE cell to the 2G/3G cell to perform the CS service, where The station of the base station serving the LTE cell and the 2G/3G cell is the same, or the LTE cell is co-located with the 2G/3G cell.
  • the site of the base station serving the LTE cell and the 2G/3G cell is the same, and the location of the base station serving the LTE cell and the 2G/3G cell is the same, for example, the same
  • the base station provides services for the LTE cell and the 2G/3G cell, and the base station may be a dual mode base station/multimode base station.
  • the so-called "2G/3G cell" in the various embodiments of the present invention refers to "2G cell" and/or "3G cell".
  • the CSFB indication may be sent by the MME (Mobility Management Entity) to the eNB.
  • MME Mobility Management Entity
  • Step 102 After receiving the CSFB indication, the eNB sends a measurement control message to the UE, where the measurement control message is used to indicate that the UE performs cell signal quality measurement and sends a corresponding event measurement report.
  • Step 103 The eNB selects to complete the CSFB switching by blind handover according to the receiving condition of the event measurement report sent by the UE, or selects to complete the CSFB switching by using the measurement-based handover.
  • completing the handover of the CSFB by using the blind handover includes: directly switching the UE to a pre-configured blind handover neighboring cell of the current LTE cell.
  • the blind handoff neighbor is a 2G/3G cell, including but not limited to a GSM or UMTS or CDMA2000 cell.
  • the measurement-based handover refers to first measuring the signal quality of the 2G/3G neighboring cell of the current LTE cell, and initiating the handover according to the measured signal quality of the 2G/3G neighboring cell.
  • 2G/3G neighbors include, but are not limited to, GSM or UMTS or CDMA2000 neighbors.
  • the measurement of the signal quality of the 2G/3G neighboring cell of the current LTE cell is performed according to the actual network construction. Which LTE cell is co-located with the network cell, instructs the UE to measure the signal quality of the network cell, so as to switch the UE to the 2G/3G cell that is co-located with the LTE cell for CS service.
  • the eNB After receiving the CSFB indication, the eNB sends a measurement control message to the UE, and selects a handover mode according to the event measurement report sent by the UE, so as to switch the UE to the 2G/3G neighboring cell of the LTE cell, so that
  • the CSFB failure caused by the blind handover improves the probability of successful handover.
  • the embodiment of the present invention will be constructed by using a LTE cell and a UMTS cell to be co-located, and the UE is switched from the LTE system to the UMTS network to perform the CS service as an example to describe the CSFB handover method provided by the embodiment of the present invention.
  • the method includes :
  • Step 201 The eNB receives a CSFB indication from the MME.
  • the CSFB indication indicates that a certain UE is handed over from the LTE cell to the 2G/3G cell for CS service.
  • Step 202 The eNB sends a first measurement control message and a second measurement control message to the UE, where the first measurement control message is used to instruct the UE to measure the signal quality of the current LTE cell and send a first event measurement report, where the second measurement control is performed.
  • the message is used to instruct the UE to measure the signal quality of the current LTE cell and the UMTS neighbor of the current LTE cell and send a second event measurement.
  • the first measurement control message when the UE receives the first measurement control message (in an actual application, the first measurement control message may be referred to as an A1 measurement control message), the signal quality of the LTE cell in which it is currently located is measured, and The measured signal quality of the LTE cell is compared with the threshold in the A1 measurement control message. If the measured signal quality of the LTE cell is greater than the threshold in the A1 measurement control message, the first event measurement report is sent to the eNB (in practice) In the application, the first event measurement report may be referred to as an A1 event measurement report, where the first event measurement report includes a signal quality of an LTE cell in which the UE is currently located.
  • the first measurement control message may be referred to as a B1 measurement control message
  • the signal quality of the 3G neighboring area is measured, and the measured signal quality of the 2G/3G neighboring cell is compared with the threshold of the B1 measurement control message, if the measured signal quality of the 2G/3G neighboring cell is greater than the B1 measurement control message.
  • the threshold of the second event measurement is sent to the eNB.
  • the first event measurement report may be referred to as a B1 event measurement report, where the second event measurement report includes the current LTE of the UE.
  • the eNB receives an event measurement report.
  • the signal quality of the LTE cell is good to some extent; if the second event measurement report is received first, the LTE cell is indicated to some extent. The signal quality is not good. Since the current serving cell of the UE is an LTE cell, when the signal quality of the LTE cell is good, the speed of receiving the first event measurement report is faster than that of the second event measurement report, therefore, if received first,
  • the second event measurement report corresponding to the 2G/3G cell indicates that the signal quality of the LTE cell is not good.
  • the signal quality of the LTE cell is good, indicating that the UE is closer to the eNB, since the LTE cell and the UMTS cell are co-located, it can be seen from FIG. 1 that the LTE cell and the UMTS cell overlap at a position closer to the eNB. Covered, so in this case, blind handoff can be performed directly (step 204).
  • the signal quality of the LTE cell is not good, indicating that the UE is far away from the eNB. As can be seen from FIG. 1, in this case, the UE is likely to be located within the coverage of the LTE cell and is located in the same station as the LTE cell.
  • the target handover cell may be a 2G/3G cell that is not co-located with the current LTE cell, thereby ensuring the success of the CSFB handover.
  • Step 204 Complete the CSFB switching by blind switching.
  • the step 204 includes: directly switching the UE to a pre-configured UMTS blind handover neighboring cell of the currently located LTE cell.
  • the step 204 includes:
  • the eNB sends a handover command to the UE, where the handover command includes a UMTS blind handover neighbor of the current LTE cell.
  • Step 205 The CSFB switching is completed by the measurement based switching.
  • the step 205 includes:
  • the step 205 includes:
  • the eNB sends a handover command to the UE, where the handover command includes the UMTS cell to be handed over, that is, the cell with the best signal quality in the foregoing second event measurement.
  • the eNB completes the reception of the event measurement report sent by the UE, selects to complete the CSFB handover by blind handover, or selects to complete the handover based on the measurement. CSFB switching.
  • the eNB After receiving the CSFB indication, the eNB sends a measurement control message to the UE, and selects a handover mode according to the event measurement report sent by the UE, so as to switch the UE to the 2G/3G neighboring cell of the LTE cell, so that
  • the CSFB failure caused by the blind handover improves the probability of successful handover.
  • the embodiment of the present invention selects the switching mode by simultaneously transmitting the first measurement control message and the second measurement control message according to the sequence of receiving the first event measurement report and the second measurement report, so as to ensure that blind switching is adopted as much as possible, and blind adoption is adopted.
  • the signal quality measurement time of the 2G/3G cell can be omitted, and the voice service establishment delay can be shortened.
  • the LTE cell and the UMTS cell are jointly configured, and the UE is switched from the LTE system to the UMTS network to perform the CS service as an example to describe the CSFB switching method provided by the embodiment of the present invention.
  • the method includes :
  • Step 301 The eNB receives the CSFB indication from the MME.
  • Step 302 Send a first measurement control message to the UE, where the first measurement control message is used to indicate that the UE measures the signal quality of the current LTE cell and sends a first event measurement report.
  • Step 303 Determine whether the first event measurement report sent by the UE is received within a predetermined time. If yes, go to step 304; if no, go to step 305.
  • Step 304 Complete the CSFB switching by blind switching.
  • the handover of the CSFB is completed by the blind handover, including: directly switching the UE to a pre-configured UMTS blind handover neighboring cell of the current LTE cell.
  • Step 305 Send a second measurement control message to the UE, where the second measurement control message is used to instruct the UE to measure the signal quality of the current LTE cell and the UMTS neighbor of the current LTE cell and send a second event measurement report.
  • Step 306 Receive a second event measurement report sent by the UE.
  • Step 307 The CSFB switching is completed by the measurement based switching.
  • the step 307 includes: selecting, from the second event measurement report, a UMTS cell with the best signal quality to perform handover.
  • the embodiment of the present invention sends a measurement control message to the UE after receiving the CSFB indication by the eNB. And selecting the handover mode according to the event measurement report sent by the UE, to switch the UE to the 2G/3G neighboring cell of the LTE cell, so as to avoid that the UE is located in an LTE cell that exceeds the coverage of the 2G/3G cell in the prior art.
  • the phenomenon of CSFB failure caused by blind handover improves the probability of successful handover.
  • a fourth embodiment of the present invention provides a CSFB switching apparatus, which is applicable to the method provided in Embodiment 1.
  • the apparatus includes:
  • the first receiving module 401 is configured to receive a CSFB indication, where the CSFB indication indicates that the UE is handed over from the LTE cell to the 2G/3G cell for performing the CS service, where the LTE cell and the 2G/3G cell are jointly constructed;
  • the sending module 402 is configured to send, after the receiving module 401 receives the CSFB indication, a measurement control message to the UE, where the measurement control message is used to indicate that the UE performs cell signal quality measurement and sends a corresponding event measurement report.
  • the second receiving module 403 is configured to receive an event measurement report sent by the UE.
  • the switching module 404 is configured to select, according to the reception condition of the event measurement report sent by the UE, to complete the CSFB switching by using the blind handover, or to select the CSFB switching by using the measurement-based handover.
  • the eNB After receiving the CSFB indication, the eNB sends a measurement control message to the UE, and selects a handover mode according to the event measurement report sent by the UE, so as to switch the UE to the 2G/3G neighboring cell of the LTE cell, so that
  • the CSFB failure caused by the blind handover improves the probability of successful handover.
  • a fifth embodiment of the present invention provides a CSFB switching apparatus, which is applicable to the method provided in Embodiment 2.
  • the apparatus includes:
  • the first receiving module 501 is configured to receive a CSFB indication, where the CSFB indication indicates that the UE is handed over from the LTE cell to the 2G/3G cell for performing the CS service, where the LTE cell and the 2G/3G cell are jointly constructed;
  • the sending module 502 is configured to send, after the receiving module 501 receives the CSFB indication, a measurement control message to the UE, where the measurement control message is used to indicate that the UE performs cell signal quality measurement and sends a corresponding event measurement report.
  • the second receiving module 503 is configured to receive an event measurement report sent by the UE.
  • the switching module 504 is configured to select, according to the receiving condition of the event measurement report sent by the UE, to complete the switching of the CSFB by the blind handover, or to select the switching of the CSFB by the measurement-based switching.
  • the sending module 502 is configured to send the first measurement control message and the second measurement control message to the UE, where the first measurement control message is used to instruct the UE to measure the signal quality of the current LTE cell and send the first event measurement.
  • the second measurement control message is used to indicate that the UE measures the signal quality of the 2G/3G neighboring cell of the current LTE cell and the current LTE cell and sends a second event measurement report.
  • the switching module 504 includes:
  • the first switching unit 5041 is configured to: when the second receiving module 503 first receives the first event measurement report, select to complete the CSFB switching by using a blind handover;
  • the second switching unit 5042 is configured to, when the second receiving module 503 receives the second event measurement report, select to complete the switching of the CSFB by using the measurement-based switching.
  • the first switching unit 5041 is configured to directly switch the UE to a pre-configured 2G/3G cell corresponding to the current LTE cell when the first receiving module 503 receives the first event measurement report.
  • the second switching unit 5042 is configured to: when the second receiving module 503 receives the second event measurement report, select a 2G/3G cell with the best signal quality from the second event measurement report, and perform switching.
  • the eNB After receiving the CSFB indication, the eNB sends a measurement control message to the UE, and selects a handover mode according to the event measurement report sent by the UE, so as to switch the UE to the 2G/3G neighboring cell of the LTE cell, so that
  • the CSFB failure caused by the blind handover improves the probability of successful handover.
  • the embodiment of the present invention selects the switching mode by simultaneously transmitting the first measurement control message and the second measurement control message according to the sequence of receiving the first event measurement report and the second measurement report, so as to ensure that blind switching is adopted as much as possible, and blind adoption is adopted.
  • the signal quality measurement time of the 2G/3G cell can be omitted, and the voice service establishment delay can be shortened.
  • Embodiment 6 of the present invention provides a CSFB switching device, which is applicable to the method provided in Embodiment 3.
  • the device includes:
  • the receiving module 601 is configured to receive a CSFB indication, where the CSFB indication indicates that the UE is handed over from the LTE cell to the 2G/3G cell for performing CS service, where the LTE cell and the 2G/3G cell are co-located Construction
  • the sending module 602 is configured to send, after the receiving module 601 receives the CSFB indication, a measurement control message to the UE, where the measurement control message is used to indicate that the UE performs cell signal quality measurement and sends a corresponding event measurement report.
  • the second receiving module 603 is configured to receive an event measurement report sent by the UE.
  • the switching module 604 is configured to select, according to the receiving condition of the event measurement report sent by the UE, to complete the CSFB switching by using the blind handover, or to select the CSFB switching by using the measurement-based handover.
  • the sending module 602 the sending module 602
  • the switching module 604 includes:
  • the determining unit 6041 is configured to determine whether the second receiving module 603 receives the first event measurement report within a predetermined time
  • the third switching unit 6042 is configured to: when the determination result of the determining unit 6041 is YES, select to complete the switching of the CSFB by blind switching;
  • the fourth switching unit 6043 is configured to select to complete the switching of the CSFB by the measurement-based switching when the determination result of the determining unit 6041 is NO.
  • the third switching unit 6042 is configured to directly switch the UE to a pre-configured blind handover neighboring cell of the current LTE cell.
  • sending module 602 is further configured to:
  • the second measurement control message is sent to the UE, where the second measurement control message is used to instruct the UE to measure the signal quality of the current LTE cell and the 2G/3G neighboring cell of the current LTE cell, and send the first Two event measurement report;
  • the fourth switching unit 6043 is configured to select, from the second event measurement report, a 2G/3G cell with the best signal quality to perform handover.
  • the eNB After receiving the CSFB indication, the eNB sends a measurement control message to the UE, and selects a handover mode according to the event measurement report sent by the UE, so as to switch the UE to the 2G/3G neighboring cell of the LTE cell, so that
  • the CSFB switching apparatus provided in Embodiments 4, 5, and 6 of the present invention may be a base station (such as an eNB).
  • the embodiment of the present invention provides a base station.
  • the base station includes a transmitter 71, a receiver 72, and at least one processor 74 (for example, a CPU).
  • the components of the base station 70 will be specifically described below with reference to FIG. 8:
  • the receiver 72 is configured to receive the CSFB indication, and receive the first event measurement report and the second event measurement report sent by the UE.
  • the transmitter 71 is configured to send, by the processor 74, the first measurement control message and the second measurement to the UE. Control messages, and switch instructions.
  • the processor 74 can implement, when the receiver 72 receives the CSFB indication, the control transmitter 71
  • the UE sends a measurement control message, which is used to indicate that the UE performs cell signal quality measurement and sends a corresponding event measurement report, and selects to complete the blind measurement by receiving the event measurement report sent by the UE to the UE. Switching of CSFB, or selecting to complete CSFB switching by measurement-based switching.
  • the processor 74 controls the transmitter 71 to send the measurement control message to the UE, where the processor 74 controls the transmitter 71 to simultaneously send the first measurement control message and the second measurement control message to the UE, where the first measurement control message is used.
  • the second measurement control message is used to instruct the UE to measure the signal quality of the UMTS neighboring cell of the current LTE cell and the current LTE cell, and send a second event measurement.
  • the processor 74 receives the first event measurement report and/or the second event measurement report through the receiver 72. If the first event measurement is received first, the blind switch is initiated by the transmitter 71 (ie, the CSFB switching is selected by blind handover). If the second event measurement report is received first, the measurement based switching is initiated by the transmitter 71 (ie, the switching of the CSFB is completed by the measurement based switching).
  • the processor 74 controls the transmitter 71 to send the measurement control message to the UE, where: the processor 74 controls the transmitter 71 to send the first measurement control message and receives the first event measurement report sent by the UE by the receiver 72; Determining whether the receiver 72 receives the first event measurement report sent by the UE within a predetermined time. If the first event measurement report sent by the UE is received within a predetermined time, the transmitter 71 initiates a blind handover, and vice versa, through the transmitter. 71 initiates a measurement based handover.
  • the processor 74 controls the transmitter 71 to The UE sends a second measurement control message, where the second measurement control message is used to indicate that the UE measures the signal quality of the current LTE cell and the 2G/3G neighboring cell of the LTE cell and sends a second event measurement message; and receives the message through the receiver 72. Second event measurement report. Then, the processor 74 selects a 2G/3G cell with the best signal quality from the second event measurement report, and initiates a measurement-based handover by the transmitter 72.
  • the base station 70 can also include components such as a memory 73, and a communication bus 75.
  • the memory 73 can be used to store software programs and application modules, and the processor 74 performs various functional applications and data processing of the base station 70 by running software programs and/or application modules stored in the memory 73.
  • the memory 73 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function, and the like; the storage data area may store data created according to the use of the computer 70, and the like.
  • the memory 73 may include a high speed RAM (random access memory), and may also include a non-volatile memory such as at least one magnetic disk storage device, a flash memory device, or other volatile solid state. Storage device.
  • the communication bus 75 is used to implement connection communication between the processor 74, the memory 73, the transmitter 71, and the receiver 72.
  • Figure 8 does not constitute a limitation to a base station, it may include more or fewer components than illustrated, or some components may be combined, or different components may be arranged.
  • the eNB After receiving the CSFB indication, the eNB sends a measurement control message to the UE, and selects a handover mode according to the event measurement report sent by the UE, so as to switch the UE to the 2G/3G neighboring cell of the LTE cell, so that
  • the CSFB failure caused by the blind handover improves the probability of successful handover.
  • the CSFB switching apparatus provided in the foregoing embodiment performs the CSFB switching, only the division of each functional module described above is illustrated. In actual applications, the function allocation may be completed by different functional modules as needed.
  • CSFB switching device provided by the foregoing embodiment is the same as the CSFB switching method embodiment, and the specific implementation process is described in the method embodiment, and details are not described herein again.
  • the completion of the hardware may also be performed by a program to instruct related hardware.
  • the program may be stored in a computer readable storage medium.
  • the storage medium mentioned above may be a read only memory, a magnetic disk or an optical disk.

Abstract

本发明公开了一种CSFB切换方法、装置和系统,属于通信领域。所述方法包括:eNB接收CSFB指示;eNB在收到该CSFB指示后,向所述用户设备发送测量控制消息,所述测量控制消息用于指示所述用户设备进行小区信号质量的测量以及发送相应的事件测量报告;所述基站根据所述用户设备发送的事件测量报告的接收情况,选择通过盲切换完成CSFB的切换,或选择通过基于测量的切换完成CSFB的切换。所述装置包括:第一接收模块、发送模块、第二接收模块和切换模块。本发明通过根据用户设备发送的事件测量报告的接收情况,选择通过盲切换或选择通过基于测量的切换完成CSFB的切换,从而提高了CSFB切换成功的概率。

Description

电路域回落切换方法、 装置和基站 技术领域
本发明涉及通信技术领域, 特别涉及一种 CSFB ( Circuit Switched Fall Back, 电路域回落)切换方法、 装置和基站。 背景技术
CSFB是一种在 LTE ( Long Term Evolution, 长期演进) 系统覆盖区域内 使用其他 RAN( Radio Access Network,无线接入网)支持 CS域( Circuit Switched Domain, 电路域)通话的技术。 CSFB流程可以使得用户设备的 CS业务, 例 如语音业务, 都切换到相对较低带宽的接入网络, 如 GSM ( Global System of Mobile communication , 全球移动通信系统 ) /UMTS ( Universal Mobile Telecommunications System, 通用移动通信系统)等, 从而可以节省运营商的 带宽资源。
现有的 CSFB切换方法中, 通常会为每个 LTE小区预先配置一个对应的 GSM/UMTS小区, 当 UE ( User Equipment, 用户设备 )需要使用语音业务时, 会切换到与 UE当前所在的 LTE小区相对应的 GSM/UMTS小区中。 为了减少 语音业务建立时延, 现有的 CSFB 切换方法通常采用盲切换。 也就是说, 当 UE 需要使用语音业务时, 直接切换到预先配置的与当前 LTE 小区的 GSM/UMTS盲切换邻区。
在实现本发明的过程中, 发明人发现现有技术至少存在以下问题: 现有的 CSFB切换方法适用于 LTE小区和 GSM/UMTS小区的重叠覆盖区 域, 而在 LTE小区和 GSM/UMTS小区未重叠覆盖的区域, CSFB 4艮可能会失 败, 进而导致该 UE切换失败, 无法使用 CS业务。 发明内容
为了解决现有技术的问题, 本发明实施例提供了一种 CSFB切换方法、 装 置和系统。 所述技术方案如下:
一方面, 本发明实施例提供了一种 CSFB切换方法, 所述方法包括: eNB ( eNodeB,基站)接收 CSFB指示,所述 CSFB指示表明将 UE从 LTE 小区切换至 2G/3G小区以进行 CS业务, 其中, 所述 LTE小区与所述 2G/3G 小区共站建设;
所述 eNB在收到所述 CSFB指示后, 向所述 UE发送测量控制消息, 所述 测量控制消息用于指示所述 UE进行小区信号质量的测量以及发送相应的事件 测量报告;
所述 eNB根据所述 UE发送的事件测量报告的接收情况,选择通过盲切换 完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
优选地, 所述向所述 UE发送测量控制消息, 包括:
同时向所述 UE发送第一测量控制消息和第二测量控制消息, 所述第一测 量控制消息用于指示 UE测量当前 LTE小区的信号质量并发送所述第一事件测 量报告, 所述第二测量控制消息用于指示 UE测量当前 LTE小区和当前 LTE 小区的 2G/3G邻区的信号质量并发送所述第二事件测量 告;
相应地, 所述 eNB根据所述 UE发送的事件测量报告的接收情况, 选择通 过盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换, 包括:
接收所述第一事件测量报告和所述第二事件测量报告, 若先收到所述第一 事件测量报告, 则选择通过盲切换完成 CSFB的切换; 若先收到所述第二事件 测量艮告, 则选择通过基于测量的切换完成 CSFB的切换。
进一步地, 所述选择通过基于测量的切换完成 CSFB的切换, 包括: 从所述第二事件测量报告中,选择信号质量最好的 2G/3G小区,执行切换。 可选地, 所述向所述 UE发送测量控制消息, 包括:
向所述 UE发送第一测量控制消息, 所述第一测量控制消息用于指示 UE 测量当前 LTE小区的信号质量并发送所述第一事件测量 告;
相应地, 所述 eNB根据所述 UE发送的事件测量报告的接收情况, 选择通 过盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换, 包括:
判断是否在预定时间内收到所述第一事件测量报告, 若是, 则选择通过盲 切换完成 CSFB的切换;若否,则选择通过基于测量的切换完成 CSFB的切换。
进一步地, 若选择通过基于测量的切换完成 CSFB的切换, 则所述方法还 包括: 当所述 eNB没有在预定时间内收到所述第一事件测量报告时, 所述 eNB 向所述 UE发送第二测量控制消息, 所述第二测量控制消息用于指示 UE测量 当前 LTE小区和当 LTE小区的 2G/3G邻区的信号质量并发送第二事件测量报 告.
接收所述第二事件测量报告;
相应地, 所述通过基于测量的切换完成 CSFB的切换, 包括:
从所述第二事件测量报告中,选择信号质量最好的 2G/3G小区,执行切换。 具体地, 所述选择通过盲切换完成 CSFB的切换, 包括:
直接将所述 UE切换到预先配置的所述当前 LTE小区的盲切换邻区。 另一方面, 本发明实施例提供了一种 CSFB切换装置, 所述装置包括: 第一接收模块, 用于 CSFB指示, 所述 CSFB指示表明将 UE从 LTE小区 切换至 2G/3G小区以进行 CS业务, 其中, 所述 LTE小区与所述 2G/3G小区 共站建设;
发送模块, 用于在所述接收模块收到所述 CSFB指示后, 向 UE发送测量 控制消息, 所述测量控制消息用于指示所述 UE进行小区信号质量的测量以及 发送相应的事件测量报告;
第二接收模块, 用于接收所述 UE发送的事件测量报告;
切换模块, 用于根据所述 UE发送的事件测量报告的接收情况, 选择通过 盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
优选地, 所述发送模块, 用于同时向所述 UE发送第一测量控制消息和第 二测量控制消息,所述第一测量控制消息用于指示 UE测量当前 LTE小区的信 号质量并发送第一事件测量 告, 所述第二测量控制消息用于指示 UE测量当 前 LTE小区和当前 LTE小区的 2G/3G邻区的信号质量并发送所述第二事件测 量报告;
相应地, 所述切换模块包括:
第一切换单元, 用于当所述第二接收模块先收到所述第一事件测量报告 时, 通过盲切换完成 CSFB的切换;
第二切换单元, 用于当所述第二接收模块先收到所述第二事件测量报告 时, 通过基于测量的切换完成 CSFB的切换。
进一步地, 所述第一切换单元, 用于当所述第二接收模块先收到所述第一 事件测量报告时,直接将所述 UE切换到预先配置的所述当前 LTE小区的盲切 换邻区。
进一步地, 所述第二切换单元, 用于当所述第二接收模块先收到所述第二 事件测量报告时,从所述第二事件测量报告中,选择信号质量最好的 2G/3G小 区, 执行切换。
可选地, 所述发送模块, 用于向所述 UE发送第一测量控制消息, 所述第 一测量控制消息用于指示 UE测量当前 LTE小区的信号质量并发送所述第一事 件测量报告;
相应地, 所述切换模块包括:
判断单元, 用于判断所述第二接收模块是否在预定时间内收到所述第一事 件测量报告;
第三切换单元, 用于当所述判断单元的判断结果为是时, 选择通过盲切换 完成 CSFB的切换;
第四切换单元, 用于当所述判断单元的判断结果为否时, 选择通过基于测 量的切换完成 CSFB的切换。
具体地, 所述第三切换单元, 用于直接将所述 UE切换到预先配置的所述 当前 LTE小区的盲切换邻区。
进一步地, 所述发送模块还用于, 当所述判断单元的判断结果为否时, 向 所述用户设备发送第二测量控制消息, 所述第二测量控制消息用于指示 UE测 量当前 LTE小区和当前 LTE小区的 2G/3G邻区的信号质量并发送第二事件测 量报告;
相应地, 所述第四切换单元, 用于从所述第二事件测量报告中, 选择信号 质量最好的 2G/3G小区, 执行切换。 又一方面, 本发明实施例还提供了一种基站, 所述基站包括:
接收器, 用于接收 CSFB指示以及 UE发送的事件测量报告, 所述 CSFB 指示表明将用户设备从 LTE小区切换至 2G/3G小区以进行电路域 CS业务,其 中, 为所述 LTE小区与所述 2G/3G小区提供服务的基站的站点相同;
发送器, 用于发送测量控制消息; 以及
处理器, 用于在所述接收器接收到 CSFB指示时, 控制所述发送器向 UE 发送测量控制消息,并根据所述接收器对 UE发送的事件测量报告的接收情况, 选择通过盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的 切换, 其中, 所述, 测量控制消息用于指示所述 UE进行小区信号质量的测量 以及发送相应的事件测量报告。
优选地, 所述处理器,
用于控制所述发送器同时向所述用户设备发送第一测量控制消息和第二 测量控制消息,所述第一测量控制消息用于指示用户设备测量当前 LTE小区的 信号质量并发送所述第一事件测量 告, 所述第二测量控制消息用于指示用户 设备测量当前 LTE小区和当前 LTE小区的 2G/3G邻区的信号质量并发送所述 第二事件测量报告;
用于当先收到所述第一事件测量报告时, 选择通过盲切换完成 CSFB的切 换; 当先收到所述第二事件测量报告, 选择通过基于测量的切换完成 CSFB的 切换。
可选地, 所述处理器,
用于控制所述发送器向所述用户设备发送第一测量控制消息, 所述第一测 量控制消息用于指示用户设备测量当前 LTE 小区的信号质量并发送所述第一 事件测量报告; 以及
用于判断是否在预定时间内收到所述第一事件测量报告, 若是, 则选择通 过盲切换完成 CSFB的切换; 若否, 则选择通过基于测量的切换完成 CSFB的 切换。 本发明实施例提供的技术方案带来的有益效果是:
本发明实施例通过在 eNB收到 CSFB指示后, 向 UE发送测量控制消息, 并根据 UE发送的事件测量报告选择切换方式, 以将该 UE切换到该 LTE小区 的 2G/3G邻区, 从而可以避免现有技术中, UE位于超出 2G/3G小区覆盖范围 的 LTE小区时, 盲切换导致的 CSFB失败的现象, 提高了切换成功的概率。 附图说明
为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例描述中所 需要使用的附图作筒单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明 的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。 图 1是本发明实施例的应用场景的示意图;
图 2是本发明实施例一提供的 CSFB切换方法的流程图;
图 3是本发明实施例二提供的 CSFB切换方法的流程图;
图 4是本发明实施例三提供的 CSFB切换方法的流程图;
图 5是本发明实施例四提供的 CSFB切换装置的结构示意图;
图 6a是本发明实施例五提供的 CSFB切换装置的结构示意图;
图 6b是本发明实施例五提供的判断模块的结构示意图;
图 7a是本发明实施例六提供的 CSFB切换装置的结构示意图;
图 7b是本发明实施例六提供的判断模块的结构示意图;
图 8是本发明实施例七提供的基站的结构示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚, 下面将结合附图对本发明 实施方式作进一步地详细描述。
为了便于理解本发明, 首先筒单介绍本发明实施例的应用场景。 本发明实 施例适用于 LTE小区与 2G/3G小区共站建设的场景。
具体地, LTE小区与 2G/3G小区共站建设至少可以包括如下情况:一、 LTE 小区、 GSM小区以及 UMTS小区共站建设; 二、 LTE小区和 GSM小区共站 建设;三、 LTE小区和 UMTS小区共站建设;四、 LTE小区和 CDMA2000( Code Division Multiple Access 2000, 码分多址 2000 ) 小区共站建设。
下面以前述第三种情况为例, 对本发明实施例的应用场景进行详细介绍。 某运营商在城区采用 UMTS2100做连续覆盖,在话务热点地区覆盖非常紧 密。 在 LTE建设初期, 该运营商采用 LTE2600或 LTE1800对话务热点区进行 覆盖。 LTE小区和 UMTS小区可以采用共站建设,或者说为该 LTE小区与 2G/3G 小区提供服务的基站的站点相同。
该 LTE小区和 UMTS小区的大小并不是严格 1: 1的并且 LTE小区可能并 不是连续的。 如图 1所示, 图中的虚线框表示 LTE小区, 实线框表示 UMTS 小区。 从图中可以看出, 一个 UMTS小区的覆盖范围大于共站建设的 LTE小 区覆盖范围。 当 UE处于图中虚线框和实线框未重叠区域 12 (即虚线框中离基 站 10较远处 )时, 若此时 UE需要使用 CS业务, 采用现有技术直接切换到预 先配置的盲切换邻区, 将会导致切换失败, 使得该 UE无法使用 CS业务。 基 于此,本发明实施例提出根据 UE当前所在 LTE小区的信号质量的好坏来选择 切换方式的方案来解决前述问题, 进而提高 CSFB切换的成功率。 下面采用具 体实施例对本发明进行详细说明。 实施例一
本发明实施例提供了一种 CSFB切换方法, 参见图 2, 该方法包括: 步骤 101 : eNB接收 CSFB指示, 该 CSFB指示表明将 UE从 LTE小区切 换至 2G/3G小区以进行 CS业务, 其中, 为该 LTE小区与 2G/3G小区提供服 务的基站的站点相同, 或者说, LTE小区与 2G/3G小区共站建设。
容易知道, 在本发明实施例中, 为该 LTE小区与 2G/3G小区提供服务的 基站的站点相同, 表示为 LTE小区与 2G/3G小区提供服务的基站所在位置相 同, 比如可以是由同一个基站为 LTE小区与 2G/3G小区提供服务, 该基站可 以是双模基站 /多模基站。 另外, 本发明各个实施例中所谓 "2G/3G小区", 指 的是 "2G小区"和 /或 "3G小区"。
具体地, 该 CSFB指示可以由 MME ( Mobility Management Entity, 移动性 管理实体)发送给 eNB。
步骤 102: eNB在接收到 CSFB指示后, 向 UE发送测量控制消息, 该测 量控制消息用于指示该 UE进行小区信号质量的测量以及发送相应的事件测量 报告。
步骤 103: eNB根据该 UE发送的事件测量报告的接收情况, 选择通过盲 切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
具体地, 通过盲切换完成 CSFB的切换包括: 直接将 UE切换到预先配置 的当前 LTE小区的盲切换邻区。 该盲切换邻区为 2G/3G小区, 包括但不限于 GSM或 UMTS或 CDMA2000小区。
具体地, 基于测量的切换是指先测量当前 LTE小区的 2G/3G邻区的信号 质量,根据测得的 2G/3G邻区的信号质量发起切换。 2G/3G邻区包括但不限于 GSM或 UMTS或 CDMA2000邻区。
其中, 测量当前 LTE小区的 2G/3G邻区的信号质量, 是根据实际网络建 设情况执行的。 LTE小区与哪种网络小区共站建设, 便指示 UE测量哪种网络 小区的信号质量,以便于将 UE向与 LTE小区共站建设的 2G/3G小区切换以进 行 CS业务。 本发明实施例通过在 eNB收到 CSFB指示后, 向 UE发送测量控制消息, 并根据 UE发送的事件测量报告选择切换方式, 以将该 UE切换到该 LTE小区 的 2G/3G邻区, 从而可以避免现有技术中, UE位于超出 2G/3G小区覆盖范围 的 LTE小区时, 盲切换导致的 CSFB失败的现象, 提高了切换成功的概率。 实施例二
本发明实施例将以 LTE小区和 UMTS小区共站建设, 且 UE从 LTE系统 切换到 UMTS网络以进行 CS业务为例, 来说明本发明实施例提供的 CSFB切 换方法, 参见图 3, 该方法包括:
步骤 201: eNB接收来自 MME的 CSFB指示。
该 CSFB指示表明将某一 UE从 LTE小区切换到 2G/3G小区, 以进行 CS 业务。
步骤 202: eNB同时向 UE发送第一测量控制消息和第二测量控制消息, 该第一测量控制消息用于指示 UE测量当前 LTE小区的信号质量并发送第一事 件测量报告,该第二测量控制消息用于指示 UE测量当前 LTE小区和当前 LTE 小区的 UMTS邻区的信号质量并发送第二事件测量 告。
具体地, 当 UE收到第一测量控制消息 (在实际应用中, 该第一测量控制 消息可以被称为 A1测量控制消息)时, 会对其当前所在 LTE小区的信号质量 进行测量, 并将测得的 LTE小区的信号质量与 A1测量控制消息中的阈值进行 比较, 若测得的 LTE小区的信号质量大于该 A1测量控制消息中的阈值, 则向 eNB发送第一事件测量报告 (在实际应用中, 该第一事件测量报告可以被称为 A1事件测量报告 ),该第一事件测量报告中包括该 UE当前所在 LTE小区的信 号质量。
当 UE收到第二测量控制消息(在实际应用中, 该第一测量控制消息可以 被称为 B1测量控制消息)时, 会对其当前所在 LTE小区的信号质量和当前所 在 LTE小区的 2G/3G邻区的信号质量进行测量, 并将测得的 2G/3G邻区的信 号质量与 B1测量控制消息中的阈值进行比较, 若测得的 2G/3G邻区的信号质 量大于 B1测量控制消息中的阈值, 则向 eNB发送第二事件测量 4艮告 (在实际 应用中, 该第一事件测量报告可以被称为 B1事件测量报告 ), 该第二事件测量 报告中包括该 UE当前所在 LTE小区的信号质量以及该 LTE小区的 2G/3G邻 区的信号质量。 步骤 203: 若先接收到第一事件测量报告, 则执行步骤 204; 若先接收到 第二事件测量报告, 则执行步骤 205。
本步骤中, eNB接收事件测量报告。 在 LTE小区和 UMTS小区共站建设 的情况下,若先接收到第一事件测量,一定程度上表示 LTE小区的信号质量好; 若先接收到第二事件测量报告,一定程度上表示 LTE小区的信号质量不好。 由 于 UE当前的服务小区是 LTE小区, 在 LTE小区信号质量好的情况下, 收到 第一事件测量报告的速度会比第二事件测量报告的速度快, 因此, 如果先收到
2G/3G小区对应的第二事件测量报告, 表示 LTE小区的信号质量不好。
另外, 如果 LTE小区的信号质量好, 表示 UE离 eNB较近, 由于 LTE小 区和 UMTS小区共站建设, 从图 1 中可以看出, 在离 eNB较近的位置, LTE 小区和 UMTS小区是重叠覆盖的,所以在这种情况下,可以直接进行盲切换(步 骤 204 )。 而 LTE小区的信号质量不好, 表示 UE离 eNB较远, 从图 1中可以 看出, 在这种情况下, UE很可能位于 LTE小区覆盖的范围内而位于与该 LTE 小区共站建设的 UMTS小区的覆盖范围以外(即图 1中 12所指区域),此时若 采用盲切换, 很可能会切换失败, 因此, 在这种情况下, 采用基于测量的切换 (步骤 205 ) ,根据第二事件测量 告选择目标切换小区(该目标切换小区可能 是与当前 LTE小区不共站的 2G/3G小区 ), 从而保证 CSFB切换的成功。
步骤 204: 通过盲切换完成 CSFB的切换。
具体地, 该步骤 204包括: 直接将该 UE切换到预先配置的当前所在 LTE 小区的 UMTS盲切换邻区。
在具体实现中, 该步骤 204包括:
eNB向 UE发送切换指令, 该切换指令中包含当前 LTE小区的 UMTS盲 切换邻区。
步骤 205: 通过基于测量的切换完成 CSFB的切换。
具体地, 该步骤 205包括:
从第二事件测量报告中, 选择信号质量最好的 UMTS小区, 执行切换。 更具体地, 该步骤 205包括:
eNB向 UE发送切换指令, 该切换指令中包含待切换的 UMTS小区, 即前 述第二事件测量_¾告中信号质量最好的小区。
通过上述步骤 203-205完成了 eNB根据该 UE发送的事件测量报告的接收 情况, 选择通过盲切换完成 CSFB 的切换, 或选择通过基于测量的切换完成 CSFB的切换。
本发明实施例通过在 eNB收到 CSFB指示后, 向 UE发送测量控制消息, 并根据 UE发送的事件测量报告选择切换方式, 以将该 UE切换到该 LTE小区 的 2G/3G邻区, 从而可以避免现有技术中, UE位于超出 2G/3G小区覆盖范围 的 LTE小区时, 盲切换导致的 CSFB失败的现象, 提高了切换成功的概率。 并 且, 本发明实施例通过同时发送第一测量控制消息和第二测量控制消息并根据 接收第一事件测量报告和第二测量报告的顺序来选择切换方式, 可以保证尽量 采用盲切换, 在采用盲切换的情形下可以省去 2G/3G小区信号质量测量时间, 缩短语音业务建立时延。 实施例三
本发明实施例同样以 LTE小区和 UMTS小区共站建设, 且 UE从 LTE系 统切换到 UMTS网络以进行 CS业务为例, 来说明本发明实施例提供的 CSFB 切换方法, 参见图 4, 该方法包括:
步骤 301 : eNB接收来自 MME的 CSFB指示。
该 CSFB指示表明将 UE从 LTE小区切换至 2G/3G小区以进行 CS业务。 步骤 302: 向 UE发送第一测量控制消息, 该第一测量控制消息用于指示 UE测量当前 LTE小区的信号质量并发送第一事件测量报告。
步骤 303: 判断是否在预定时间内收到 UE发送的第一事件测量报告, 若 是, 则执行步骤 304; 若否, 则执行步骤 305。
步骤 304: 通过盲切换完成 CSFB的切换。
具体地, 通过盲切换完成 CSFB的切换, 包括: 直接将该 UE切换到预先 配置的当前 LTE小区的 UMTS盲切换邻区。
步骤 305: 向 UE发送第二测量控制消息, 该第二测量控制消息用于指示 UE测量当前 LTE小区和当前 LTE小区的 UMTS邻区的信号质量并发送第二 事件测量报告。
步骤 306: 接收 UE发送的第二事件测量报告。
步骤 307: 通过基于测量的切换完成 CSFB的切换。
具体地, 该步骤 307包括: 从第二事件测量报告中, 选择信号质量最好的 UMTS小区, 执行切换。
本发明实施例通过在 eNB收到 CSFB指示后, 向 UE发送测量控制消息, 并根据 UE发送的事件测量报告选择切换方式, 以将该 UE切换到该 LTE小区 的 2G/3G邻区, 从而可以避免现有技术中, UE位于超出 2G/3G小区覆盖范围 的 LTE小区时, 盲切换导致的 CSFB失败的现象, 提高了切换成功的概率。 实施例四
本发明实施例四提供了一种 CSFB切换装置, 适用于实施例一提供的方法 参见图 5, 该装置包括:
第一接收模块 401 ,用于接收 CSFB指示,该 CSFB指示表明将 UE从 LTE 小区切换至 2G/3G小区以进行 CS业务, 其中, 该 LTE小区与 2G/3G小区共 站建设;
发送模块 402, 用于在接收模块 401收到 CSFB指示后, 向 UE发送测量 控制消息, 该测量控制消息用于指示该 UE进行小区信号质量的测量以及发送 相应的事件测量报告;
第二接收模块 403, 用于接收 UE发送的事件测量报告;
切换模块 404, 用于根据 UE发送的事件测量报告的接收情况, 选择通过 盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
本发明实施例通过在 eNB收到 CSFB指示后, 向 UE发送测量控制消息, 并根据 UE发送的事件测量报告选择切换方式, 以将该 UE切换到该 LTE小区 的 2G/3G邻区, 从而可以避免现有技术中, UE位于超出 2G/3G小区覆盖范围 的 LTE小区时, 盲切换导致的 CSFB失败的现象, 提高了切换成功的概率。 实施例五
本发明实施例五提供了一种 CSFB切换装置,适用于实施例二提供的方法, 参见图 6a, 该装置包括:
第一接收模块 501 ,用于接收 CSFB指示,该 CSFB指示表明将 UE从 LTE 小区切换至 2G/3G小区以进行 CS业务, 其中, 该 LTE小区与 2G/3G小区共 站建设;
发送模块 502, 用于在接收模块 501收到 CSFB指示后, 向 UE发送测量 控制消息, 该测量控制消息用于指示该 UE进行小区信号质量的测量以及发送 相应的事件测量报告;
第二接收模块 503, 用于接收 UE发送的事件测量报告; 切换模块 504, 用于根据 UE发送的事件测量报告的接收情况, 选择通过 盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
进一步地, 该发送模块 502, 用于同时向 UE发送第一测量控制消息和第 二测量控制消息, 其中, 第一测量控制消息用于指示 UE测量当前 LTE小区的 信号质量并发送第一事件测量 告, 第二测量控制消息用于指示 UE测量当前 LTE小区和当前 LTE小区的 2G/3G邻区的信号质量并发送第二事件测量报告; 相应地, 如图 6b所示, 切换模块 504包括:
第一切换单元 5041 ,用于当第二接收模块 503先收到所述第一事件测量报 告时, 选择通过盲切换完成 CSFB的切换;
第二切换单元 5042,用于当第二接收模块 503先收到所述第二事件测量报 告时, 选择通过基于测量的切换完成 CSFB的切换。
具体地,第一切换单元 5041 ,用于当第二接收模块 503先收到第一事件测 量报告时,直接将该 UE切换到预先配置的与当前 LTE小区对应的 2G/3G小区。
具体地,第二切换单元 5042,用于当第二接收模块 503先收到第二事件测 量报告时, 从第二事件测量报告中, 选择信号质量最好的 2G/3G小区, 执行切 换。 本发明实施例通过在 eNB收到 CSFB指示后, 向 UE发送测量控制消息, 并根据 UE发送的事件测量报告选择切换方式, 以将该 UE切换到该 LTE小区 的 2G/3G邻区, 从而可以避免现有技术中, UE位于超出 2G/3G小区覆盖范围 的 LTE小区时, 盲切换导致的 CSFB失败的现象, 提高了切换成功的概率。 并 且, 本发明实施例通过同时发送第一测量控制消息和第二测量控制消息并根据 接收第一事件测量报告和第二测量报告的顺序来选择切换方式, 可以保证尽量 采用盲切换, 在采用盲切换的情形下可以省去 2G/3G小区信号质量测量时间, 缩短语音业务建立时延。 实施例六
本发明实施例六提供了一种 CSFB切换装置, 适用于实施例三提供的方法 参见图 7a, 该装置包括:
接收模块 601 , 用于接收 CSFB指示, 该 CSFB指示表明将 UE从 LTE小 区切换至 2G/3G小区以进行 CS业务, 其中, 该 LTE小区与 2G/3G小区共站 建设;
发送模块 602, 用于在接收模块 601收到 CSFB指示后, 向 UE发送测量 控制消息, 该测量控制消息用于指示该 UE进行小区信号质量的测量以及发送 相应的事件测量报告;
第二接收模块 603, 用于接收 UE发送的事件测量报告;
切换模块 604, 用于根据 UE发送的事件测量报告的接收情况, 选择通过 盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
具体地, 发送模块 602,
用于向 UE发送第一测量控制消息, 该第一测量控制消息用于指示 UE测 量当前 LTE小区的信号质量并发送第一事件测量 告;
相应地, 切换模块 604包括:
判断单元 6041 ,用于判断第二接收模块 603是否在预定时间内收到第一事 件测量报告;
第三切换单元 6042, 用于当判断单元 6041的判断结果为是时, 选择通过 盲切换完成 CSFB的切换;
第四切换单元 6043, 用于当判断单元 6041的判断结果为否时, 选择通过 基于测量的切换完成 CSFB的切换。
进一步地, 第三切换单元 6042, 用于直接将 UE切换到预先配置的所述当 前 LTE小区的盲切换邻区。
更进一步地, 发送模块 602还用于,
当判断单元 6041的判断结果为否时, 向 UE发送第二测量控制消息,该第 二测量控制消息用于指示 UE测量当前 LTE小区和当前 LTE小区的 2G/3G邻 区的信号质量并发送第二事件测量报告;
相应地, 第四切换单元 6043, 用于从第二事件测量报告中, 选择信号质量 最好的 2G/3G小区, 执行切换。 本发明实施例通过在 eNB收到 CSFB指示后, 向 UE发送测量控制消息, 并根据 UE发送的事件测量报告选择切换方式, 以将该 UE切换到该 LTE小区 的 2G/3G邻区, 从而可以避免现有技术中, UE位于超出 2G/3G小区覆盖范围 的 LTE小区时, 盲切换导致的 CSFB失败的现象, 提高了切换成功的概率。 需要说明的是, 本发明实施例四、 五和六提供的 CSFB切换装置可以为基 站(比如 eNB )。 实施例七
本发明实施例提供了一种基站, 如图 8所示, 该基站包括发送器 71、接收 器 72、 以及至少一个处理器 74 (例如 CPU )。
下面结合图 8对基站 70的各个构成部件进行具体的介绍:
接收器 72用于接收 CSFB指示,接收 UE发送的第一事件测量报告和第二 事件测量 告; 发送器 71用于在处理器 74的控制下, 向 UE发送第一测量控 制消息、 第二测量控制消息、 以及切换指令。
具体地,通过运行或执行存储在存储器内的软件程序和 /或应用模块, 以及 调用存储在存储器内的数据, 处理器 74可以实现, 当接收器 72接收到 CSFB 指示时, 控制发送器 71向 UE发送测量控制消息, 该测量控制消息用于指示 该 UE进行小区信号质量的测量以及发送相应的事件测量报告, 并根据接收器 72对 UE发送的事件测量报告的接收情况,选择通过盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
优选地, 处理器 74控制发送器 71向 UE发送测量控制消息, 包括: 处理器 74控制发送器 71同时发送第一测量控制消息和第二测量控制消息 给 UE, 该第一测量控制消息用于指示 UE测量当前 LTE小区的信号质量并发 送第一事件测量4艮告,该第二测量控制消息用于指示 UE测量当前 LTE小区和 当前 LTE小区的 UMTS邻区的信号质量并发送第二事件测量报告;
处理器 74通过接收器 72接收第一事件测量报告和 /或第二事件测量报告, 若先接收到第一事件测量, 则通过发送器 71发起盲切换(即选择通过盲切换 完成 CSFB的切换), 若先接收到第二事件测量报告, 则通过发送器 71发起基 于测量的切换(即选择通过基于测量的切换完成 CSFB的切换)。
可选地, 处理器 74控制发送器 71向 UE发送测量控制消息, 包括: 处理器 74控制发送器 71发送第一测量控制消息并通过接收器 72接收 UE 发送的第一事件测量报告; 并且, 判断接收器 72是否在预定时间内收到 UE 发送的第一事件测量报告,若在预定时间内收到 UE发送的第一事件测量报告, 则通过发送器 71发起盲切换, 反之, 通过发送器 71发起基于测量的切换。
更进一步地, 若选择了基于测量的切换, 则处理器 74控制发送器 71 向 UE发送第二测量控制消息, 第二测量控制消息用于指示 UE测量当前 LTE小 区和当 LTE小区的 2G/3G邻区的信号质量并发送第二事件测量4艮告; 并通过 接收器 72接收第二事件测量报告。 然后, 处理器 74从所述第二事件测量报告 中, 选择信号质量最好的 2G/3G小区, 通过发送器 72发起基于测量的切换。
容易知道, 该基站 70还可以包括存储器 73、 以及通信总线 75等部件。 存储器 73可用于存储软件程序以及应用模块, 处理器 74通过运行存储在 存储器 73的软件程序和 /或应用模块,从而执行基站 70的各种功能应用以及数 据处理。 存储器 73可主要包括存储程序区和存储数据区, 其中, 存储程序区 可存储操作系统、 至少一个功能所需的应用程序等; 存储数据区可存储根据计 算机 70的使用所创建的数据等。此外,存储器 73可以包括高速 RAM( Random Access Memory, 随机存取存储器), 还可以包括非易失性存储器( non- volatile memory ), 例如至少一个磁盘存储器件、 闪存器件、 或其他易失性固态存储器 件。
通信总线 75用于实现处理器 74、 存储器 73、 发送器 71及接收器 72之间 的连接通信。
本领域技术人员可以理解, 图 8中所示出的结构并不构成对基站的限定, 其可以包括比图示更多或更少的部件, 或者组合某些部件, 或者不同的部件布 置。
本发明实施例通过在 eNB收到 CSFB指示后, 向 UE发送测量控制消息, 并根据 UE发送的事件测量报告选择切换方式, 以将该 UE切换到该 LTE小区 的 2G/3G邻区, 从而可以避免现有技术中, UE位于超出 2G/3G小区覆盖范围 的 LTE小区时, 盲切换导致的 CSFB失败的现象, 提高了切换成功的概率。 需要说明的是: 上述实施例提供的 CSFB切换装置在执行 CSFB切换时, 仅以上述各功能模块的划分进行举例说明, 实际应用中, 可以根据需要而将上 述功能分配由不同的功能模块完成, 即将装置的内部结构划分成不同的功能模 块, 以完成以上描述的全部或者部分功能。 另外, 上述实施例提供的 CSFB切 换装置与 CSFB切换方法实施例属于同一构思, 其具体实现过程详见方法实施 例, 这里不再赘述。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通 过硬件来完成, 也可以通过程序来指令相关的硬件完成, 所述的程序可以存储 于一种计算机可读存储介质中, 上述提到的存储介质可以是只读存储器, 磁盘 或光盘等。
以上所述仅为本发明的较佳实施例, 并不用以限制本发明, 凡在本发明的 精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的 保护范围之内。

Claims

权 利 要 求 书
1、 一种电路域回落切换方法, 其特征在于, 所述方法包括:
基站接收电路域回落 CSFB指示, 所述 CSFB指示表明将用户设备从 LTE 小区切换至 2G/3G小区以进行电路域 CS业务, 其中, 为所述 LTE小区与所述 2G/3G小区提供服务的基站的站点相同;
所述基站在接收到所述 CSFB指示后, 向所述用户设备发送测量控制消息, 所述测量控制消息用于指示所述用户设备进行小区信号质量的测量以及发送相 应的事件测量报告;
所述基站根据所述用户设备发送的事件测量报告的接收情况, 选择通过盲 切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
2、 根据权利要求 1所述的方法, 其特征在于, 所述向所述用户设备发送测 量控制消息, 包括:
同时向所述用户设备发送第一测量控制消息和第二测量控制消息, 所述第 一测量控制消息用于指示用户设备测量当前 LTE小区的信号质量并发送所述第 一事件测量 告, 所述第二测量控制消息用于指示用户设备测量当前 LTE小区 和当前 LTE小区的 2G/3G邻区的信号质量并发送所述第二事件测量 告;
相应地, 所述基站根据所述用户设备发送的事件测量报告的接收情况, 选 择通过盲切换完成 CSFB的切换,或选择通过基于测量的切换完成 CSFB的切换, 包括:
若先收到所述第一事件测量报告, 则选择通过盲切换完成 CSFB 的切换; 若先收到所述第二事件测量报告, 则选择通过基于测量的切换完成 CSFB 的切 换。
3、 根据权利要求 2所述的方法, 其特征在于, 所述选择通过基于测量的切 换完成 CSFB的切换, 包括:
从所述第二事件测量报告中,选择信号质量最好的 2G/3G 小区,执行切换。
4、 根据权利要求 1所述的方法, 其特征在于, 所述向所述用户设备发送测 量控制消息, 包括: 向所述用户设备发送第一测量控制消息, 所述第一测量控制消息用于指示 用户设备测量当前 LTE小区的信号质量并发送所述第一事件测量报告;
相应地, 所述基站根据所述用户设备发送的事件测量报告的接收情况, 选 择通过盲切换完成 CSFB的切换,或选择通过基于测量的切换完成 CSFB的切换, 包括:
判断是否在预定时间内收到所述第一事件测量报告, 若是, 则选择通过盲 切换完成 CSFB的切换; 若否, 则选择通过基于测量的切换完成 CSFB的切换。
5、 根据权利要求 4所述的方法, 其特征在于, 若选择通过基于测量的切换 完成 CSFB的切换, 则所述方法还包括:
当所述基站没有在预定时间内收到所述第一事件测量才艮告时, 所述基站向 所述用户设备发送第二测量控制消息, 所述第二测量控制消息用于指示用户设 备测量当前 LTE小区和当 LTE小区的 2G/3G邻区的信号质量并发送第二事件测 量报告;
接收所述第二事件测量报告;
相应地, 所述通过基于测量的切换完成 CSFB的切换, 包括:
从所述第二事件测量报告中, 选择信号质量最好的 2G/3G小区, 执行切换。
6、 根据权利要求 1至 5任一项所述的方法, 其特征在于, 所述选择通过盲 切换完成 CSFB的切换, 包括:
直接将所述用户设备切换到预先配置的所述当前 LTE小区的盲切换邻区。
7、 一种电路域回落切换装置, 其特征在于, 所述装置包括:
第一接收模块,用于接收电路域回落 CSFB指示,所述 CSFB指示表明将用 户设备从 LTE小区切换至 2G/3G小区以进行 CS业务, 其中, 为所述 LTE小区 与所述 2G/3G小区提供服务的基站的站点相同;
发送模块, 用于在所述接收模块收到所述 CSFB 指示后, 向用户设备发送 测量控制消息, 所述测量控制消息用于指示所述用户设备进行小区信号质量的 测量以及发送相应的事件测量报告;
第二接收模块, 用于接收所述用户设备发送的事件测量报告;
切换模块, 用于根据所述用户设备发送的事件测量报告的接收情况, 选择 通过盲切换完成 CSFB的切换, 或选择通过基于测量的切换完成 CSFB的切换。
8、 根据权利要求 7所述的装置, 其特征在于,
所述发送模块, 用于同时向所述用户设备发送第一测量控制消息和第二测 量控制消息, 所述第一测量控制消息用于指示用户设备测量当前 LTE小区的信 号质量并发送第一事件测量报告, 所述第二测量控制消息用于指示用户设备测 量当前 LTE小区和当前 LTE小区的 2G/3G邻区的信号质量并发送所述第二事件 测量报告;
相应地, 所述切换模块包括:
第一切换单元, 用于当所述第二接收模块先收到所述第一事件测量报告时, 通过盲切换完成 CSFB的切换;
第二切换单元, 用于当所述第二接收模块先收到所述第二事件测量报告时, 通过基于测量的切换完成 CSFB的切换。
9、 根据权利要求 8所述的装置, 其特征在于, 所述第一切换单元, 用于当 所述第二接收模块先收到所述第一事件测量报告时, 直接将所述用户设备切换 到预先配置的所述当前 LTE小区的盲切换邻区。
10、 根据权利要求 8所述的装置, 其特征在于, 所述第二切换单元, 用于 当所述第二接收模块先收到所述第二事件测量报告时, 从所述第二事件测量报 告中, 选择信号质量最好的 2G/3G小区, 执行切换。
11、 根据权利要求 7所述的装置, 其特征在于,
所述发送模块, 用于向所述用户设备发送第一测量控制消息, 所述第一测 量控制消息用于指示用户设备测量当前 LTE小区的信号质量并发送所述第一事 件测量报告;
相应地, 所述切换模块包括:
判断单元, 用于判断所述第二接收模块是否在预定时间内收到所述第一事 件测量报告;
第三切换单元, 用于当所述判断单元的判断结果为是时, 选择通过盲切换 完成 CSFB的切换; 第四切换单元, 用于当所述判断单元的判断结果为否时, 选择通过基于测 量的切换完成 CSFB的切换。
12、 根据权利要求 11所述的装置, 其特征在于, 所述第三切换单元, 用于 直接将所述用户设备切换到预先配置的所述当前 LTE小区的盲切换邻区。
13、 根据权利要求 11所述的装置, 其特征在于,
所述发送模块还用于, 当所述判断单元的判断结果为否时, 向所述用户设 备发送第二测量控制消息, 所述第二测量控制消息用于指示用户设备测量当前 LTE小区和当前 LTE小区的 2G/3G邻区的信号质量并发送第二事件测量报告; 相应地, 所述第四切换单元, 用于从所述第二事件测量报告中, 选择信号 质量最好的 2G/3G小区, 执行切换。
14、 一种基站, 其特征在于, 所述基站包括:
接收器, 用于接收 CSFB指示以及 UE发送的事件测量报告, 所述 CSFB指 示表明将用户设备从 LTE小区切换至 2G/3G小区以进行电路域 CS业务,其中, 为所述 LTE小区与所述 2G/3G小区提供服务的基站的站点相同;
发送器, 用于发送测量控制消息; 以及
处理器, 用于在所述接收器接收到 CSFB指示时,控制所述发送器向 UE发 送测量控制消息, 并根据所述接收器对 UE发送的事件测量报告的接收情况,选 择通过盲切换完成 CSFB的切换,或选择通过基于测量的切换完成 CSFB的切换, 其中,所述, 测量控制消息用于指示所述 UE进行小区信号质量的测量以及发送 相应的事件测量报告。
15、 根据权利要求 14所述的基站, 其特征在于, 所述处理器,
用于控制所述发送器同时向所述用户设备发送第一测量控制消息和第二测 量控制消息, 所述第一测量控制消息用于指示用户设备测量当前 LTE小区的信 号质量并发送所述第一事件测量 告, 所述第二测量控制消息用于指示用户设 备测量当前 LTE小区和当前 LTE小区的 2G/3G邻区的信号质量并发送所述第二 事件测量报告;
用于当先收到所述第一事件测量报告时, 选择通过盲切换完成 CSFB 的切 换; 当先收到所述第二事件测量报告, 选择通过基于测量的切换完成 CSFB 的 切换。
16、 根据权利要求 14所述的基站, 其特征在于, 所述处理器,
用于控制所述发送器向所述用户设备发送第一测量控制消息, 所述第一测 量控制消息用于指示用户设备测量当前 LTE小区的信号质量并发送所述第一事 件测量报告; 以及
用于判断是否在预定时间内收到所述第一事件测量报告, 若是, 则选择通 过盲切换完成 CSFB的切换;若否,则选择通过基于测量的切换完成 CSFB的切 换。
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