WO2018014461A1 - 电路域回落csfb重定向方法、装置、终端及系统 - Google Patents

电路域回落csfb重定向方法、装置、终端及系统 Download PDF

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Publication number
WO2018014461A1
WO2018014461A1 PCT/CN2016/104070 CN2016104070W WO2018014461A1 WO 2018014461 A1 WO2018014461 A1 WO 2018014461A1 CN 2016104070 W CN2016104070 W CN 2016104070W WO 2018014461 A1 WO2018014461 A1 WO 2018014461A1
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Prior art keywords
signal value
cell
neighboring cell
terminal
increased
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PCT/CN2016/104070
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English (en)
French (fr)
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苏二路
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/083—Reselecting an access point wherein at least one of the access points is a moving node
    • 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
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
    • 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
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present invention relates to the field of communications, and in particular, to a circuit domain fallback CSFB redirection method, apparatus, terminal, and system.
  • the network side device usually uses the 2G and 3G neighboring cells of the current LTE cell as the redirected target cell and initiates a redirection operation, if If the signal value of the neighboring area is strong, the CS voice service will be performed.
  • CSFB Circuit Switched Fallback
  • the network side device may choose to redirect the WCDMA cell and perform a redirection operation, but it takes about a few seconds to initiate a call from the terminal to the terminal to fall back to the WCDMA cell to establish a call. During this period, the terminal has moved a certain distance, so that the target cell signal value of the network redirection may have weakened or disappeared, which may cause the redirection failure and the CSFB call to fail.
  • the high-speed movement of the terminal may cause the call to fail.
  • FIG. 1 is a schematic diagram of terminal redirection when moving at high speed.
  • the area enclosed by the dotted line of the WCDMA cell A is the signal range of the cell A
  • the WCDMA cell B is located.
  • the area enclosed by the dotted line is the signal range of the cell B, and the terminal resides in the LTE A cell.
  • the CSFB call is initiated.
  • the signal value of the adjacent WCDMA cell A is compared. High, so the LTE A cell will send the frequency to the terminal WCDMA cell A for redirection, but the train is still running.
  • the embodiment of the invention provides a CSFB redirection method, device, terminal and system method and device, so as to at least solve the problem that the CSFB call fails due to the redirection failure of the terminal in the related process in the related art.
  • a CSFB redirection method including: initiating a CSFB service, measuring a first signal value of at least one neighboring cell of a cell currently camped by the terminal; receiving a weight delivered by the network side device Directional information, measuring a signal value of the target cell indicated by the redirection information and a second signal value of the at least one neighboring cell; comparing the first signal value and the second signal value, in the at least And determining, by a neighboring cell, a neighboring cell with an increased signal value; selecting a phase that increases with the signal value according to a comparison result between a second signal value of the neighboring cell that is increased by the signal value and a signal value of the target cell
  • the CSFB service is performed by a frequency point corresponding to the neighboring cell or a frequency point corresponding to the target cell.
  • selecting a frequency point corresponding to the neighboring cell with the increased signal value or the target according to a comparison result between the second signal value of the neighboring cell that is increased by the signal value and the signal value of the target cell
  • performing, by the frequency point corresponding to the cell, the CSFB service where: when determining that the second signal value of the neighboring cell with the increased signal value is greater than the signal value of the target cell, selecting a neighboring cell with the increased signal value
  • the CSFB service is performed at a frequency.
  • selecting a frequency point corresponding to the neighboring cell with the increased signal value or the target according to a comparison result between the second signal value of the neighboring cell that is increased by the signal value and the signal value of the target cell
  • performing, by the frequency point corresponding to the cell, the CSFB service further comprising: when determining that the second signal value of the neighboring cell with the increased signal value is smaller than the signal value of the target cell, acquiring the neighboring cell with the increased signal value a difference between the second signal value and a signal value of the target cell; Determining whether the difference is greater than a first preset threshold; when the difference is greater than the first preset threshold, selecting a frequency point corresponding to the target cell to perform the CSFB service; When the first preset threshold is described, the frequency corresponding to the adjacent cell whose signal value is increased is selected to perform the CSFB service.
  • the first preset threshold is a change amount of a signal value between adjacent cells that is estimated in advance when the terminal moves.
  • the method further includes: determining whether the moving speed of the terminal is greater than a second preset threshold, where When the moving speed of the terminal is greater than the second preset threshold, the first signal value of the at least one neighboring cell that measures the cell currently camped by the terminal is triggered.
  • the neighboring cells are multiple, the neighboring cells are stored in descending order according to the first signal value.
  • determining, in the multiple neighboring cells, the neighboring cell with the increased signal value includes: determining that the second signal value is the largest and the trend of the signal value is increasing in the multiple neighboring cells
  • the neighboring cell is a neighboring cell whose signal value is increased.
  • a CSFB redirection apparatus including: a first processing module, configured to initiate a CSFB service, and measure a first signal value of at least one neighboring cell of a cell currently camped by the terminal a second processing module, configured to receive redirection information delivered by the network side device, and measure a signal value of the target cell indicated by the redirection information and a second signal value of the at least one neighboring cell; And configured to compare the first signal value and the second signal value, and determine a neighboring cell in which the signal value is increased in the at least one neighboring cell; and a selection module configured to increase the phase according to the signal value As a result of comparing the second signal value of the neighboring cell with the signal value of the target cell, the frequency of the neighboring cell that is increased by the signal value or the frequency point corresponding to the target cell is selected to perform the CSFB service.
  • the selecting module is further configured to: when determining that the second signal value of the neighboring cell whose signal value is increased is greater than the signal value of the target cell, select a frequency point of the neighboring cell that is increased by the signal value. Perform the CSFB service.
  • the selecting module is further configured to: when determining that the second signal value of the neighboring cell with the increased signal value is smaller than the signal value of the target cell, acquiring the second of the neighboring cell with the increased signal value a difference between a signal value and a signal value of the target cell; determining whether the difference is greater than a first preset threshold; and when the difference is greater than the first preset threshold, selecting a frequency corresponding to the target cell And performing, by the point, the CSFB service; when the difference is less than the first preset threshold, selecting a frequency point corresponding to the neighboring cell with the increased signal value to perform the CSFB service.
  • the device further includes: a determining module, configured to determine whether the moving speed of the terminal is greater than a second preset threshold, where when the moving speed of the terminal is greater than the second preset threshold, triggering Measuring the first signal value of the at least one neighboring cell of the cell in which the terminal is currently camped.
  • a determining module configured to determine whether the moving speed of the terminal is greater than a second preset threshold, where when the moving speed of the terminal is greater than the second preset threshold, triggering Measuring the first signal value of the at least one neighboring cell of the cell in which the terminal is currently camped.
  • a terminal comprising: the CSFB redirection device of any of the above.
  • a CSFB redirection system including a terminal and a network side device, wherein the terminal is configured to initiate a CSFB service, and measure at least one of the currently camped cells of the terminal. a first signal value of the neighboring cell; receiving redirection information sent by the network side device, measuring a signal value of the target cell indicated by the redirection information, and a second signal value of the at least one neighboring cell; Comparing the first signal value and the second signal value, determining, in the at least one neighboring cell, a neighboring cell with an increased signal value; and adding a second signal value of the neighboring cell according to the signal value a comparison result of the signal values of the target cell, selecting a frequency point corresponding to the neighboring cell whose signal value is increased or a frequency point corresponding to the target cell, and performing the CSFB service;
  • the terminal sends the redirection information.
  • a storage medium is also provided.
  • the storage medium is arranged to store program code for performing the following steps: initiating CSFB service, measuring terminal current And a first signal value of the at least one neighboring cell of the camped cell; receiving redirection information delivered by the network side device, measuring a signal value of the target cell indicated by the redirection information, and the at least one neighboring cell a second signal value; comparing the first signal value and the second signal value, determining, in the at least one neighboring cell, a neighboring cell with an increased signal value; and adding a neighboring cell according to the signal value As a result of comparing the two signal values with the signal value of the target cell, the frequency of the neighboring cell that is increased by the signal value or the frequency point corresponding to the target cell is selected to perform the CSFB service.
  • the storage medium is further configured to store program code for performing the following steps: selecting the signal value when determining that the second signal value of the neighboring cell whose signal value is increased is greater than the signal value of the target cell The frequency of the adjacent neighboring cells is increased to perform the CSFB service.
  • the storage medium is further configured to store program code for performing the following steps: acquiring the signal value when determining that the second signal value of the neighboring cell whose signal value is increased is smaller than the signal value of the target cell And a difference between the second signal value of the neighboring cell and the signal value of the target cell; determining whether the difference is greater than a first preset threshold; when the difference is greater than the first preset threshold, Selecting a frequency point corresponding to the target cell to perform the CSFB service; when the difference is less than the first preset threshold, selecting a frequency point corresponding to the neighboring cell with the increased signal value to perform the CSFB service
  • the storage medium is further configured to store program code for performing: determining whether the moving speed of the terminal is greater than a second preset threshold, wherein when the moving speed of the terminal is greater than the second preset At the threshold, triggering measurement of the first signal value of the at least one neighboring cell of the cell currently camped by the terminal
  • the storage medium is further configured to store program code for performing the following steps: when the neighboring cells are plural, storing the neighboring cells in descending order according to the first signal value.
  • the storage medium is further configured to store program code for: determining, in the plurality of neighboring cells, that the second signal value is the largest and the change trend of the signal value is an increased neighboring cell A neighboring cell with an increased signal value.
  • the first signal value of at least one neighboring cell of the cell currently camped by the terminal and the signal value of the target cell indicated by the redirection information and the second signal value of the at least one neighboring cell are selected and compared by the present invention.
  • the frequency corresponding to the adjacent cell whose value is increased or the frequency corresponding to the target cell performs the CSFB service, which effectively solves the problem that the redirection fails due to the terminal movement, and then causes the CSFB call to fail, so that the terminal can still select the signal while moving.
  • the cell with better value completes the redirection of the CSFB call, avoids the redirection failure caused by the movement of the terminal, and improves the quality of the CSFB call and the user experience.
  • 1 is a schematic diagram of terminal redirection when moving at high speed
  • FIG. 2 is a network architecture diagram of CSFB redirection according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of a method for CSFB redirection according to an embodiment of the present invention.
  • FIG. 4 is a flow chart of a method for CSFB redirection in accordance with an alternate embodiment of the present invention
  • FIG. 5 is a flow chart of a method for CSFB redirection according to another alternative embodiment of the present invention.
  • FIG. 6 is a flow chart of information exchange of CSFB redirection according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of a CSFB redirection device according to an embodiment of the present invention.
  • FIG. 8 is a block diagram showing the structure of a CSFB redirection device in accordance with an alternative embodiment of the present invention.
  • the value of the signal is used to reflect the strength of the signal.
  • the power of a certain signal received on a physical channel such as PDCH, PRACH, or PUSCH is called the Receive Signal Receiving Power. RSCP).
  • the network architecture includes: a terminal 22 and a network side device 24, wherein the terminal 22 is configured to initiate a CSFB service to the network side device 24. And receiving the redirection information sent by the network side device 24, and selecting the corresponding frequency point to perform the CSFB service according to the redirection information and the signal quantity of the measurement neighboring cell of the terminal 22; the network side device 24 is configured to receive the CSFB sent by the terminal 22.
  • the service requests and delivers the redirection information to the terminal 22.
  • FIG. 2 a CSFB redirection method is provided in FIG. 2, and FIG. 3 is a flowchart of a CSFB redirection method according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:
  • Step S302 initiating a CSFB service, and measuring a first signal value of at least one neighboring cell of a cell currently camped by the terminal;
  • Step S304 Receive redirection information delivered by the network side device, and measure a signal value of the target cell indicated by the redirection information and a second signal value of the at least one neighboring cell.
  • Step S306 comparing the first signal value and the second signal value, and determining, in the at least one neighboring cell, a neighboring cell with an increased signal value;
  • Step S308 according to the comparison result between the second signal value of the adjacent cell and the signal value of the target cell, the signal value corresponding to the adjacent cell with the increased signal value or the frequency corresponding to the target cell is selected to perform the CSFB service.
  • the terminal is implemented to measure and compare at least one phase of the cell currently camped by the terminal. Selecting, by the first signal value of the neighboring cell and the signal value of the target cell indicated by the redirection information, and the second signal value of the at least one neighboring cell, selecting a frequency point corresponding to the neighboring cell with the increased signal value or a frequency corresponding to the target cell.
  • the CSFB service is used to effectively solve the problem that the redirection failure occurs due to the terminal movement, which in turn causes the CSFB call to fail. Therefore, the terminal can still select the cell with better signal value to complete the CSFB call redirection when moving, avoiding the terminal.
  • the redirection failure caused by the movement improves the quality of the CSFB call and the user experience.
  • the foregoing step S308 may be performed to: when determining that the second signal value of the neighboring cell whose signal value is increased is greater than the signal value of the target cell, select a frequency point of the neighboring cell whose signal value is increased.
  • the CSFB service is performed. Through the foregoing judging process, the CSFB service can be performed at a frequency point where the signal value is greater than the neighboring cell of the target cell, and the signal value of the selected target cell is in a continuously growing state.
  • the foregoing step S308 may further perform the following operations: when determining that the second signal value of the neighboring cell with the increased signal value is smaller than the signal value of the target cell, acquiring the neighboring cell with the increased signal value The difference between the two signal values and the signal value of the target cell; determining whether the difference is greater than the first preset threshold; when the difference is greater than the first preset threshold, selecting the frequency point corresponding to the target cell for CSFB service; when the difference is less than When the first preset threshold is used, the frequency corresponding to the adjacent cell whose signal value is increased is selected to perform CSFB service.
  • the second signal value of the neighboring cell with the increased signal value is subtracted from the signal value of the target cell to obtain a difference, and then the difference is compared with the first preset threshold, and the signal value is measured according to the comparison result. Whether the difference between the second signal value of the added neighboring cell and the signal value of the target cell is sufficiently large, so that the cell with the largest signal value can be selected after the call is established.
  • the first preset threshold is a change amount of a signal value between adjacent cells that is estimated in advance when the terminal moves.
  • the first preset threshold is that the terminal initiates CSFB.
  • the increase of the signal value of the neighboring cell and the decrease of the target cell delivered by the network and then accurately estimate the amount of change of the signal value between the neighboring cell and the target cell when the terminal moves.
  • the time ⁇ is the amount of change in the signal value within the unit distance when the terminal moves.
  • the following step may be further performed: determining whether the moving speed of the terminal is greater than a second preset threshold, where When the moving speed of the terminal is greater than the second preset threshold, the first signal value of the at least one neighboring cell of the cell in which the terminal is currently camped is triggered.
  • the communication technology suitable for the stationary or low-speed mobile may cause the call quality of the terminal to be reduced or failed after being applied to the scene of the terminal moving at a high speed.
  • the technical solution provided in the embodiment of the present application is also applicable to a high-speed mobile scenario.
  • the terminal before measuring the first signal value of at least one neighboring cell of the cell currently camped by the terminal, it may be determined whether the terminal is in the In the state of high-speed movement, when the terminal is greater than the second preset threshold, it is proved that the terminal is in a state of high-speed movement, and the operation of measuring the first signal value of at least one neighboring cell of the cell currently camped by the terminal may be triggered.
  • This can effectively ensure that the measurement and other steps are performed when the terminal is in a high-speed moving state, thereby avoiding the terminal performing redundant operations in a low-speed moving or stationary state, thereby saving the efficiency of call establishment.
  • the determining step of determining whether the moving speed of the terminal is greater than the second preset threshold may be before the CSFB service is initiated and the second preset threshold may be set to 200 km/hour.
  • the manner of triggering the operation of measuring the first signal value of the at least one neighboring cell of the cell currently camped by the terminal is only an optional manner, and the measurement terminal currently resides.
  • the area through which the high-speed rail passes can be set as the high-speed rail area in advance, and when the terminal is located in the high-speed rail area
  • the operation of measuring the first signal value of the at least one neighboring cell of the cell currently camped by the terminal is triggered, and the determining process may be performed by using the base station to identify the location of the terminal or adopting GPS. The positioning determines the location of the terminal to determine whether the terminal is in the high-iron area, but is not limited thereto.
  • the neighboring cells when there are multiple neighboring cells, are stored in descending order according to the first signal value.
  • Information such as UARFCN is stored in the file CSFB_P as shown in Table 1.
  • the neighboring cell with the largest signal value and related information can be quickly found by the above storage method.
  • the step of determining a neighboring cell with an increased signal value among the plurality of neighboring cells may further perform the following operations: determining that a second signal value of the plurality of neighboring cells is the largest and a change of the signal value The neighboring cell whose trend is increased is the neighboring cell whose signal value is increased.
  • the neighboring cells since the related information of the neighboring cells is stored in the file CSFB_P in descending order of the first signal value, the neighboring cells may be searched in the order of the files CSFB_P. In general, it is found that the neighboring cell whose first signal value is increased is the neighboring cell whose signal value is increased.
  • FIG. 4 is a flowchart of a CSFB redirection method according to an alternative embodiment of the present invention. As shown in FIG. 4, the process includes the following steps. :
  • the terminal resides on an LTE cell and initiates a CSFB service during the mobile process.
  • step S404 the terminal measures whether the current moving speed is greater than 200 km / h; if yes, it is determined that the state is now in the state of high-speed movement, step S406; if not, then step S416;
  • the terminal measures the first signal values P A1 and P B1 of the WCDMA neighboring cells A and B in the current SIB6 message, and sequentially stores the first signal values P A1 and P of the neighboring cells according to the signal values from large to small.
  • B1 , PCI and UARFCN are in the file CSFB_P;
  • the terminal After receiving the redirection information sent by the network side device, the terminal measures the signal value P t of the network redirection target cell and the second signal values P A2 and P B2 of the cells A and B, respectively, and the first signal value P A1 Comparing with P B1 , determining that the neighboring cell with the second signal value being the largest and the change trend of the signal value is increased in the neighboring cells is a neighboring cell whose signal value is increased (assuming that the adjacent cell with the increased signal value is B) Community);
  • step S412 obtaining a difference ⁇ P between P t and P B2 , determining whether ⁇ P is smaller than a change amount ⁇ of a signal value of a neighboring cell and a signal value of the target cell in which the terminal initiates the CSFB service to increase the estimated signal value during the establishment of the call; If yes, go to step S414; if no, go to step S416;
  • the terminal abandons the frequency point UARFCN t sent by the network, and selects the UARFCN B frequency point in the CSFB_P file to perform the CSFB service;
  • FIG. 5 is a flowchart of a method for CSFB redirection according to another optional embodiment of the present invention. As shown in FIG. 5, the process includes The following steps:
  • the terminal resides on an LTE cell and initiates a CSFB service during the mobile process.
  • step S504 the terminal measures whether the current moving speed is greater than 200 km / h; if yes, it is determined that the state is now in a high-speed movement, step S506; if not, then step S516;
  • S506 The terminal measures the first signal values P A1 and P B1 of the 2G and 3G neighboring cells A and B in the current SIB6 message, and sequentially stores the first signal value P A1 of the neighboring cell according to the signal value from large to small. And P B1 , PCI and UARFCN in the file CSFB_P;
  • the terminal After receiving the redirection information sent by the network side device, the terminal re-measures the signal value P t of the network redirection target cell and the second signal values P A2 and P B2 of the cells A and B, respectively, and respectively the first signal value P.
  • A1 and P B1 are compared to determine a neighboring cell in which the second signal value of the plurality of neighboring cells is the largest and the trend of the signal value is increased, and the neighboring cell with the increased signal value is increased (assuming that the adjacent cell with the increased signal value is B cell);
  • step S512 obtaining a difference ⁇ P between P t and P B2 , determining whether ⁇ P is smaller than a change amount ⁇ of a signal value of a neighboring cell and a signal value of the target cell in which the terminal initiates the CSFB service to increase the estimated signal value during the establishment of the call; If yes, go to step S514; otherwise, go to step S516;
  • the terminal abandons the frequency point UARFCN t sent by the network, and selects the UARFCN B frequency point in the CSFB_P file to perform CSFB service;
  • S516 The terminal selects a frequency point UARFCN t delivered by the network side device to perform CSFB service.
  • FIG. 6 is a flow chart of information exchange of CSFB redirection according to an embodiment of the present invention. As shown in FIG. 6, the process includes the following steps:
  • Step S602 the terminal initiates a CSFB service to the LTE cell.
  • Step S604 when the terminal detects that it is in a state of high-speed movement, measuring the first signal values P A1 and P B1 of the adjacent cells A and B and saving;
  • Step S606 The terminal receives the redirect message sent by the network side device, measures the signal value of the target cell, and the second signal values P A2 and P B2 of the neighboring cells A and B, and determines the neighboring cells A and B.
  • the second signal value is the largest and the change trend of the signal value is the neighboring cell whose adjacent cell is increased, and the difference between the signal value of the target cell and the adjacent cell whose signal value is increased is calculated;
  • Step S608 when the B cell is a neighboring cell whose signal value is increased and larger than the signal value of the target cell, or the B cell is a neighboring cell whose signal value is increased, and the difference between the signal value of the target cell and the adjacent cell whose signal value is increased.
  • the value is less than ⁇ , where ⁇ is the amount of change between the signal value of the neighboring cell and the signal value of the target cell in which the terminal initiates the CSFB service to increase the estimated signal value during the establishment of the call, and selects the UARFCN B frequency point for the CSFB service.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform various embodiments of the present invention. The method described.
  • a CSFB redirection device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 7 is a structural block diagram of a CSFB redirection apparatus according to an embodiment of the present invention. As shown in FIG. 7, the apparatus includes: a first processing module 72 configured to initiate a CSFB service, and measure at least one of the cells currently camped by the terminal.
  • a first processing module 72 configured to initiate a CSFB service, and measure at least one of the cells currently camped by the terminal.
  • the second processing module 74 is configured to receive the redirection information delivered by the network side device, and measure the signal value of the target cell indicated by the redirection information and the second of the at least one neighboring cell a signal value; a determining module 76 configured to compare the first signal value with the second signal value, and determine a neighboring cell with an increased signal value in the at least one neighboring cell; the selecting module 78 is configured to increase the neighboring according to the signal value As a result of comparing the signal value of the cell with the signal value of the target cell, the frequency corresponding to the neighboring cell with the increased signal value or the frequency corresponding to the target cell is selected to perform the CSFB service.
  • the selecting module 78 is further configured to: when determining that the signal value of the neighboring cell whose signal value is increased is greater than the signal value of the target cell, select a frequency point of the neighboring cell whose signal value is increased to perform CSFB service.
  • the selecting module 78 is further configured to: when determining that the signal value of the neighboring cell with the increased signal value is smaller than the signal value of the target cell, acquiring the signal value of the neighboring cell with the increased signal value and the target cell a difference between the signal values; determining whether the difference is greater than the first preset threshold; when the difference is greater than the first preset threshold, selecting a frequency point corresponding to the target cell to perform CSFB service; when the difference is less than the first preset threshold, The frequency of the adjacent cell corresponding to the increased signal value is selected for the CSFB service.
  • FIG. 8 is a CSFB reconfiguration in accordance with an alternate embodiment of the present invention.
  • the device includes a judging module 82 configured to determine whether the moving speed of the terminal is greater than a second preset threshold, wherein when the moving speed of the terminal is greater than the second preset threshold, A first signal value of at least one neighboring cell of the cell in which the terminal is currently camped is triggered.
  • the determining module 82 may be configured to determine, after the CSFB service is initiated, whether the moving speed of the terminal is greater than the second pre-measurement before measuring the first signal value of the at least one neighboring cell of the cell currently camped by the terminal.
  • the threshold value is set, wherein when the moving speed of the terminal is greater than the second preset threshold, the first signal value of the at least one neighboring cell of the cell currently camped by the measurement terminal is triggered; the determining module 82 may also be configured to be in the first processing.
  • the module 72 determines whether the moving speed of the terminal is greater than a second preset threshold before the operation of initiating the CSFB service and measuring the first signal value of the at least one neighboring cell of the cell currently camped by the terminal, where the moving speed of the terminal When the second preset threshold is greater, the first signal value of the at least one neighboring cell of the cell in which the terminal is currently camped is triggered.
  • a terminal comprising: the foregoing CSFB redirection device according to any one of the above.
  • a CSFB redirection system includes: a terminal 22 and a network side device 24, wherein the terminal 22 is configured to initiate a CSFB service, and measure at least one of the cells currently camped by the terminal 22.
  • a first signal value of the neighboring cell receiving redirection information sent by the network side device 24, measuring a signal value of the target cell indicated by the redirection information, and a second signal value of the at least one neighboring cell; comparing the first signal value And determining, by the second signal value, a neighboring cell with an increased signal value in the at least one neighboring cell; selecting a phase that increases with the signal value according to a comparison result between the signal value of the adjacent cell increased by the signal value and the signal value of the target cell
  • the frequency corresponding to the neighboring cell or the frequency corresponding to the target cell performs the CSFB service; the network side device 24 is configured to send the redirection information to the terminal 22.
  • Embodiments of the present invention also provide a storage medium.
  • the storage medium may be configured to store a program code for performing the following steps: S1, initiating a CSFB service, measuring a first signal value of at least one neighboring cell of a cell currently camped by the terminal; Redirecting information, measuring a signal value of the target cell indicated by the redirection information and a second signal value of the at least one neighboring cell; S3, comparing the first signal value and the second signal value, determining in the at least one neighboring cell a neighboring cell with an increased signal value; S4, selecting a frequency point corresponding to a neighboring cell with an increased signal value or a frequency corresponding to the target cell according to a comparison result between a signal value of a neighboring cell that is increased by a signal value and a signal value of the target cell Point to CSFB business.
  • the storage medium is further configured to store program code for performing the following steps: when determining that the signal value of the neighboring cell whose signal value is increased is greater than the signal value of the target cell, selecting the frequency of the adjacent cell with the increased signal value Point to CSFB business.
  • the storage medium is further configured to store program code for performing: acquiring a signal of a neighboring cell with an increased signal value when determining that a signal value of a neighboring cell whose signal value is increased is smaller than a signal value of the target cell The difference between the value and the signal value of the target cell; determining whether the difference is greater than the first preset threshold; when the difference is greater than the first preset threshold, selecting the frequency point corresponding to the target cell for CSFB service; when the difference is smaller than the first When the threshold is preset, the frequency corresponding to the adjacent cell whose signal value is increased is selected to perform CSFB service.
  • the storage medium is further configured to store program code for performing: determining whether the moving speed of the terminal is greater than a second preset threshold, wherein the triggering is triggered when the moving speed of the terminal is greater than the second preset threshold a first signal value of at least one neighboring cell of the cell in which the terminal is currently camped.
  • the storage medium is further arranged to store program code for performing the following steps: when there are a plurality of neighboring cells, the neighboring cells are stored in descending order of the first signal value.
  • the storage medium is further configured to store program code for performing the step of determining that the neighboring cells in the plurality of neighboring cells have the largest signal value and the trend of the signal value is increased, and the adjacent cells are adjacent to the increased signal value.
  • program code for performing the step of determining that the neighboring cells in the plurality of neighboring cells have the largest signal value and the trend of the signal value is increased, and the adjacent cells are adjacent to the increased signal value.
  • the foregoing storage medium may include, but is not limited to: a USB flash drive, only A medium that can store program code, such as a read-only memory (ROM), a random access memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • removable hard disk such as a hard disk, a magnetic disk, or an optical disk.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the technical solution provided by the embodiment of the present invention may be applied to the CSFB redirection process, and compare and compare the first signal value of at least one neighboring cell of the cell currently camped by the terminal with the signal value of the target cell indicated by the redirection information. And the second signal value of the at least one neighboring cell, selecting a frequency point corresponding to the neighboring cell with the increased signal value or a frequency point corresponding to the target cell to perform the CSFB service, effectively solving the redirection failure caused by the terminal movement, and then causing The CSFB call fails, so that the terminal can still select the cell with better signal value to complete the CSFB call redirection when moving, avoiding the redirection failure caused by the terminal movement, and improving the quality of the CSFB call and the user experience.

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Abstract

本发明提供了一种电路域回落CSFB重定向方法、装置、终端及系统通过本发明发起CSFB业务，测量终端当前所驻留小区的至少一个相邻小区的第一信号值；接收网络侧设备下发的重定向信息，测量重定向信息所指示的目标小区的信号值和至少一个相邻小区的第二信号值；比较第一信号值和第二信号值，在至少一个相邻小区中确定信号值增加的相邻小区；依据信号值增加的相邻小区的第二信号值与目标小区的信号值的比较结果，选择与信号值增加的相邻小区对应的频点或者目标小区对应的频点进行CSFB业务，解决了由于终端移动导致重定向失败，继而引起CSFB通话失败的问题，进而提高了CSFB通话的质量和用户的体验度的效果。

Description

电路域回落CSFB重定向方法、装置、终端及系统 技术领域
本发明涉及通信领域，具体而言，涉及一种电路域回落CSFB重定向方法、装置、终端及系统。
背景技术
在相关技术中，对于电路域回落(Circuit Switched Fallback，简称为CSFB)通话，网络侧设备通常会将自己当前LTE小区的2G、3G邻区作为重定向的目标小区并发起重定向操作，如果该邻区的信号值较强则会进行CS语音业务。
对于CSFB通话，当移动的终端发起CSFB业务时，网络侧设备会选择重定向WCDMA小区并进行重定向操作，但是由于从终端发起呼叫到终端回落到WCDMA小区建立通话大概需要几秒的时间，在这段时间内终端已经移动了一定的距离，使得网络重定向的目标小区信号值可能已经变弱或者消失，进而导致重定向失败和CSFB通话失败。
以高铁模式为例，当一个支持CSFB的终端在小区边缘发起呼叫时，该终端的高速移动可能会导致呼叫失败。
图1是高速移动时的终端重定向的示意图，如图1所示，假设高铁的运行速度为300Km/小时，WCDMA小区A所在的虚线围成的区域为小区A的信号范围，WCDMA小区B所在的虚线围成的区域为小区B的信号范围，终端驻留在LTE A小区，当列车到达A点后发起CSFB呼叫，由于此时对于LTE A小区而言，相邻WCDMA小区A的信号值较高，所以LTE A小区会发给终端WCDMA小区A的频点进行重定向，但是列车尚在运行中，从终端发起呼叫到终端回落到WCDMA小区建立通话大概需要3秒钟，以高铁的运行速度，在这3秒过程中列车已经运行了250m左右，假设此时到达了B点，从图1中可知，在B点时WCDMA小区A的 信号值已经明显低于WCDMA小区B的信号值，甚至可能出现WCDMA小区A已经没有信号，导致终端重定向失败，继而引起终端的通话失败。
针对上述终端在移动过程中由于出现重定向失败而引起CSFB通话失败的问题，目前尚未有有效的解决方案。
发明内容
本发明实施例提供了一种CSFB重定向方法、装置、终端及系统方法及装置，以至少解决相关技术中终端在移动过程中出现重定向失败而引起CSFB通话失败的问题。
根据本发明的一个实施例，提供了一种CSFB重定向方法，包括：发起CSFB业务，测量终端当前所驻留小区的至少一个相邻小区的第一信号值；接收网络侧设备下发的重定向信息，测量所述重定向信息所指示的目标小区的信号值和所述至少一个相邻小区的第二信号值；比较所述第一信号值和所述第二信号值，在所述至少一个相邻小区中确定信号值增加的相邻小区；依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务。
可选地，依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务，包括：当判断所述信号值增加的相邻小区的第二信号值大于所述目标小区的信号值时，选择所述信号值增加的相邻小区的频点进行所述CSFB业务。
可选地，依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务，还包括：当判断所述信号值增加的相邻小区的第二信号值小于所述目标小区的信号值时，获取所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的差值； 判断所述差值是否大于第一预设阈值；当所述差值大于所述第一预设阈值时，选择所述目标小区对应的频点进行所述CSFB业务；当所述差值小于所述第一预设阈值时，选择与所述信号值增加的相邻小区对应的频点进行所述CSFB业务。
可选地，所述第一预设阈值为所述终端移动时预先估计的相邻小区之间的信号值的变化量。
可选地，所述第一预设阈值通过如下公式确定：Δα＝V×t×Δβ×2，其中，V为所述终端的移动速度，t为CSFB过程中从发起呼叫到建立通话的时间，Δβ为所述终端移动时单位距离内的信号值的变化量。
可选地，测量终端当前所驻留小区的至少一个相邻小区的第一信号值之前，所述方法还包括：判断所述终端的移动速度是否大于第二预设阈值，其中，当所述终端的移动速度大于所述第二预设阈值时，触发测量所述终端当前所驻留小区的所述至少一个相邻小区的所述第一信号值。
可选地，当所述相邻小区为多个时，按照所述第一信号值从大到小的顺序存储所述相邻小区。
可选地，在所述多个相邻小区中确定所述信号值增加的相邻小区包括：确定所述多个相邻小区中所述第二信号值最大且信号值的变化趋势为增大的相邻小区为所述信号值增加的相邻小区。
根据本发明的另一个实施例，提供了一种CSFB重定向装置，包括：第一处理模块，设置为发起CSFB业务，以及测量终端当前所驻留小区的至少一个相邻小区的第一信号值；第二处理模块，设置为接收网络侧设备下发的重定向信息，以及测量所述重定向信息所指示的目标小区的信号值和所述至少一个相邻小区的第二信号值；确定模块，设置为比较所述第一信号值和所述第二信号值，以及在所述至少一个相邻小区中确定信号值增加的相邻小区；选择模块，设置为依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务。
可选地，所述选择模块还设置为当判断所述信号值增加的相邻小区的第二信号值大于所述目标小区的信号值时，选择所述信号值增加的相邻小区的频点进行所述CSFB业务。
可选地，所述选择模块还设置为当判断所述信号值增加的相邻小区的第二信号值小于所述目标小区的信号值时，获取所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的差值；判断所述差值是否大于第一预设阈值；当所述差值大于所述第一预设阈值时，选择所述目标小区对应的频点进行所述CSFB业务；当所述差值小于所述第一预设阈值时，选择与所述信号值增加的相邻小区对应的频点进行所述CSFB业务。
可选地，所述装置还包括：判断模块，设置为判断所述终端的移动速度是否大于第二预设阈值，其中，当所述终端的移动速度大于所述第二预设阈值时，触发测量所述终端当前所驻留小区的所述至少一个相邻小区的所述第一信号值。
根据本发明的另一个实施例，提供了一种终端，包括：上述任一项所述的CSFB重定向装置。
根据本发明的另一个实施例，提供了一种CSFB重定向的系统，包括终端和网络侧设备，其中，所述终端，设置为发起CSFB业务，测量所述终端当前所驻留小区的至少一个相邻小区的第一信号值；接收所述网络侧设备下发的重定向信息，测量所述重定向信息所指示的目标小区的信号值和所述至少一个相邻小区的第二信号值；比较所述第一信号值和所述第二信号值，在所述至少一个相邻小区中确定信号值增加的相邻小区；依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务；所述网络侧设备，设置为向所述终端下发所述重定向信息。
根据本发明的另一个实施例，还提供了一种存储介质。该存储介质设置为存储用于执行以下步骤的程序代码：发起CSFB业务，测量终端当前 所驻留小区的至少一个相邻小区的第一信号值；接收网络侧设备下发的重定向信息，测量所述重定向信息所指示的目标小区的信号值和所述至少一个相邻小区的第二信号值；比较所述第一信号值和所述第二信号值，在所述至少一个相邻小区中确定信号值增加的相邻小区；依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：当判断所述信号值增加的相邻小区的第二信号值大于所述目标小区的信号值时，选择所述信号值增加的相邻小区的频点进行所述CSFB业务。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：当判断所述信号值增加的相邻小区的第二信号值小于所述目标小区的信号值时，获取所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的差值；判断所述差值是否大于第一预设阈值；当所述差值大于所述第一预设阈值时，选择所述目标小区对应的频点进行所述CSFB业务；当所述差值小于所述第一预设阈值时，选择与所述信号值增加的相邻小区对应的频点进行所述CSFB业务
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：判断所述终端的移动速度是否大于第二预设阈值，其中，当所述终端的移动速度大于所述第二预设阈值时，触发测量所述终端当前所驻留小区的所述至少一个相邻小区的所述第一信号值
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：当所述相邻小区为多个时，按照所述第一信号值从大到小的顺序存储所述相邻小区。
可选地，存储介质还设置为存储用于执行以下步骤的程序代码：确定所述多个相邻小区中所述第二信号值最大且信号值的变化趋势为增大的相邻小区为所述信号值增加的相邻小区。
通过本发明测量并比较终端当前所驻留小区的至少一个相邻小区的第一信号值和重定向信息所指示的目标小区的信号值以及至少一个相邻小区的第二信号值，选择与信号值增加的相邻小区对应的频点或者目标小区对应的频点进行CSFB业务，有效地解决了由于终端移动导致重定向失败，继而引起CSFB通话失败的问题，使得终端在移动时仍然可以选择信号值较好的小区完成CSFB通话的重定向，避免了由于终端的移动导致的重定向失败，提高了CSFB通话的质量和用户的体验度。
附图说明
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是高速移动时的终端重定向的示意图；
图2是根据本发明实施例的CSFB重定向的网络架构图；
图3是根据本发明实施例的CSFB重定向的方法流程图；
图4是根据本发明可选实施例的CSFB重定向的方法流程图；
图5是根据本发明另一可选实施例的CSFB重定向的方法流程图；
图6是根据本发明实施例的CSFB重定向的信息交互流程图；
图7是根据本发明实施例的CSFB重定向装置的结构框图；
图8是根据本发明可选实施例的CSFB重定向装置的结构框图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。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组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
为了更好地理解本申请实施例，以下将本申请实施例中涉及的技术术语解释如下：
信号值，用于反映信号强弱的参数值，例如，为在PDCH、PRACH或PUSCH等物理信道上收到的某一信号码功率，称之为接收信号码功率(Reference Signal Receiving Power,简称为RSCP)。
实施例1
图2是根据本发明实施例的CSFB重定向的网络架构图，如图2所示，该网络架构包括：终端22和网络侧设备24，其中，终端22设置为向网络侧设备24发起CSFB业务并接收网络侧设备24下发的重定向信息，根据该重定向信息和终端22的测量相邻小区的信号量选择相应的频点进行CSFB业务；网络侧设备24设置为接收终端22发送的CSFB业务请求并向终端22下发重定向信息。
在本实施例中提供了一种运行于图2的CSFB重定向方法，图3是根据本发明实施例的CSFB重定向的方法流程图，如图3所示，该流程包括如下步骤：
步骤S302，发起CSFB业务，测量终端当前所驻留小区的至少一个相邻小区的第一信号值；
步骤S304，接收网络侧设备下发的重定向信息，测量重定向信息所指示的目标小区的信号值和至少一个相邻小区的第二信号值；
步骤S306，比较第一信号值和第二信号值，在至少一个相邻小区中确定信号值增加的相邻小区；
步骤S308，依据信号值增加的相邻小区的第二信号值与目标小区的信号值的比较结果，选择与信号值增加的相邻小区对应的频点或者目标小区对应的频点进行CSFB业务。
通过上述步骤，实现了测量并比较终端当前所驻留小区的至少一个相 邻小区的第一信号值和重定向信息所指示的目标小区的信号值以及至少一个相邻小区的第二信号值，选择与信号值增加的相邻小区对应的频点或者目标小区对应的频点进行CSFB业务，有效地解决了由于终端移动导致重定向失败，继而引起CSFB通话失败的问题，使得终端在移动时仍然可以选择信号值较好的小区完成CSFB通话的重定向，避免了由于终端的移动导致的重定向失败，提高了CSFB通话的质量和用户的体验度。
在一个可选的实施例中，上述步骤S308可以执行以下操作：当判断信号值增加的相邻小区的第二信号值大于目标小区的信号值时，选择信号值增加的相邻小区的频点进行CSFB业务，通过上述判断过程，可以在信号值大于目标小区的相邻小区的频点进行CSFB业务且选择的目标小区的信号值是处于持续增长状态中的。
在一个可选的实施例中，上述步骤S308还可以执行以下操作：当判断信号值增加的相邻小区的第二信号值小于目标小区的信号值时，获取信号值增加的相邻小区的第二信号值与目标小区的信号值的差值；判断差值是否大于第一预设阈值；当差值大于第一预设阈值时，选择目标小区对应的频点进行CSFB业务；当差值小于第一预设阈值时，选择与信号值增加的相邻小区对应的频点进行CSFB业务。本实施例将信号值增加的相邻小区的第二信号值与目标小区的信号值相减得到一个差值，然后将该差值与第一预设阈值进行比较，根据上述比较结果衡量信号值增加的相邻小区的第二信号值与目标小区的信号值的差值是否足够大，使得在建立通话后能够选取信号值最大的小区。
在一个可选的实施例中，第一预设阈值为终端移动时预先估计的相邻小区之间的信号值的变化量，在本实施例中，由于该第一预设阈值是终端发起CSFB业务到建立通话过程中预估的信号值增加的相邻小区的信号值与目标小区的信号值的变化量，因此将上述差值与该变化量进行比较可以准确预估在建立通话结束时，增加的相邻小区的信号值的增加量和网络下发的目标小区的减少量，继而准确预估终端移动时相邻小区与目标小区之间的信号值的变化量。
在一个可选实施例中，上述第一预设阈值可以通过如下公式确定：Δα＝V×t×Δβ×2，其中，V为终端的移动速度，t为CSFB过程中从发起呼叫到建立通话的时间，Δβ为终端移动时单位距离内的信号值的变化量。
在本实施例中，由于增加的相邻小区的信号值的增加量和目标小区的信号值的减少量是相同的，均为α，因此，Δα＝2×α,其中，α＝V×t×Δβ，在现有技术中，终端在基站边缘移动时每100米的信号值变化大约为3dB，而终端进行CSFB过程从发起呼叫到建立通话大约是3s，因此，上述公式可以写成：α＝V×3×3。
在一个可选的实施例中，在测量终端当前所驻留小区的至少一个相邻小区的第一信号值之前，还可以执行以下步骤：判断终端的移动速度是否大于第二预设阈值，其中，当终端的移动速度大于第二预设阈值时，触发测量终端当前所驻留小区的至少一个相邻小区的第一信号值。
由于终端高速移动的场景与终端静止或者低速移动的场景还是具有一定的区别的，适用于静止或者低速移动的通信技术在应用到终端高速移动的场景后可能会引起终端通话质量的降低或者失败，而本申请实施例中提供的技术方案同样可适用于高速移动场景，在本实施例中，在测量终端当前所驻留小区的至少一个相邻小区的第一信号值之前，可以判断终端是否处于高速移动的状态，当终端大于第二预设阈值时，证明该终端处于高速移动的状态，则可以触发测量终端当前所驻留小区的至少一个相邻小区的第一信号值的操作。这样可以有效地保证了当终端处于高速移动的状态下才会执行测量等步骤，避免了终端在低速移动或者静止状态下执行多余的操作，节省了通话建立的效率。
可选地，上述判断终端的移动速度是否大于第二预设阈值的判断步骤可以在发起CSFB业务之前且上述第二预设阈值可以设定为200千米/小时。
在本实施例中，上述触发测量终端当前所驻留小区的至少一个相邻小区的第一信号值的操作的方式仅仅为可选的方式，在测量终端当前所驻留 小区的至少一个相邻小区的第一信号值之前，判断终端是否处于高速移动的状态，还可以通过以下的方式实现：可以预先将高铁经过的区域设置为高铁区域，当判断终端位于上述高铁区域中时，则确定该终端处于高速移动的状态，进而触发测量终端当前所驻留小区的至少一个相邻小区的第一信号值的操作，上述判断过程可以通过基站对于终端的位置识别或者采用GPS定位确定该终端的位置进而确定该终端是否处于高铁区域中，但是并不限于此。
在一个可选的实施例中，当相邻小区为多个时，按照第一信号值从大到小的顺序存储相邻小区。可选地，可以将测量的终端当前所驻留小区的至少一个相邻小区的信号值RSCP、物理小区ID(Physical Cell Identifier，简称为PCI)和UTRA绝对射频信道号(UTRA Absolute Radio Frequency Channel Number，简称为UARFCN)等信息存储在在文件CSFB_P中，如表1所示。
  PCI UARFCN RSCP
CellA PCIA UARFCNA PA
CellB PCIB UARFCNB PB
CellT PCIt UARFCNt Pt
表1
在本实施中，通过上述的存储方式可以快速地找到信号值最大的相邻小区及其相关信息。
在一个可选的实施例中，上述多个相邻小区中确定信号值增加的相邻小区的步骤还可以执行下述操作：确定多个相邻小区中第二信号值最大且信号值的变化趋势为增大的相邻小区为信号值增加的相邻小区。在本实施例中，由于是按照第一信号值从大到小的顺序存储相邻小区的相关信息到文件CSFB_P中，因此可以按照相邻小区在文件CSFB_P中的顺序进行查 到，一般情况下，查找到第一个信号值增加的相邻小区为上述信号值增加的相邻小区。
实施例2
在本实施例中提供了另一种运行于图2的CSFB重定向方法，图4是根据本发明可选实施例的CSFB重定向的方法流程图，如图4所示，该流程包括如下步骤：
S402，终端驻留在LTE小区上并且在移动过程中发起CSFB业务；
S404，终端测量当前移动速度是否大于200千米/小时；若是，则判断此时正处于高速移动的状态中，执行步骤S406；若否，则执行步骤S416；
S406，终端测量当前SIB6消息中WCDMA相邻小区A和B的第一信号值PA1和PB1，并按照信号值从大到小的顺序依次存储相邻小区的第一信号值PA1和PB1，PCI和UARFCN在文件CSFB_P中；
S408，终端收到网络侧设备下发的重定向信息后测量网络重定向目标小区的信号值Pt和小区A和B的第二信号值PA2和PB2并分别与第一信号值PA1和PB1进行比较，确定多个相邻小区中第二信号值最大且信号值的变化趋势为增大的相邻小区为信号值增加的相邻小区(假设信号值增加的相邻小区为B小区)；
S410，判断重定向目标小区的信号值Pt是否大于信号值增加的相邻小区的信号值PB2；若是，则执行步骤S412；若否，则执行步骤S414；
S412，获取Pt与PB2的差值ΔP，判断ΔP是否小于终端发起CSFB业务到建立通话过程中预估的信号值增加的相邻小区的信号值与目标小区的信号值的变化量Δα；若是，则执行步骤S414；若否，执行步骤S416；
S414，终端放弃选择网络下发的频点UARFCNt，选择CSFB_P文件中的UARFCNB频点进行CSFB业务；
S416，终端选择网络侧设备下发的频点UARFCNt进行CSFB业务。
实施例3
在本实施例中提供了另一种运行于图2的CSFB重定向方法，图5是根据本发明另一可选实施例的CSFB重定向的方法流程图，如图5所示，该流程包括如下步骤：
S502，终端驻留在LTE小区上并且在移动过程中发起CSFB业务；
S504，终端测量当前移动速度是否大于200千米/小时；若是，则判断此时正处于高速移动的状态中，执行步骤S506；若否，则执行步骤S516；
S506，终端测量当前SIB6消息中2G、3G相邻小区A和B的第一信号值PA1和PB1，并按照信号值从大到小的顺序依次存储相邻小区的第一信号值PA1和PB1，PCI和UARFCN在文件CSFB_P中；
S508，终端收到网络侧设备下发的重定向信息后再次测量网络重定向目标小区的信号值Pt和小区A和B的第二信号值PA2和PB2并分别与第一信号值PA1和PB1进行比较，确定多个相邻小区中第二信号值最大且信号值的变化趋势为增大的相邻小区为信号值增加的相邻小区(假设信号值增加的相邻小区为B小区)；
S510，判断重定向目标小区的信号值Pt是否大于信号值增加的相邻小区的信号值PB2；若是，则执行步骤S512；若否，则执行步骤S514；
S512，获取Pt与PB2的差值ΔP，判断ΔP是否小于终端发起CSFB业务到建立通话过程中预估的信号值增加的相邻小区的信号值与目标小区的信号值的变化量Δα；若是，则执行步骤S514；否则，执行步骤S516；
S514，终端放弃选择网络下发的频点UARFCNt，选择CSFB_P文件中的UARFCNB频点进行CSFB业务；
S516，终端选择网络侧设备下发的频点UARFCNt进行CSFB业务。
实施例4
在本实施例中提供了另一种运行于图2的CSFB重定向方法，图6是根据本发明实施例的CSFB重定向的信息交互流程图，如图6所示，该流程包括如下步骤：
步骤S602，终端向LTE小区发起CSFB业务；
步骤S604，当终端监测到其处于高速移动的状态中，测量相邻小区A和B的第一信号值PA1和PB1并保存；
步骤S606，终端接收到网络侧设备下发的重定向消息，测量该目标小区的信号值和相邻小区A和B的第二信号值PA2和PB2，确定相邻小区A和B中第二信号值最大且信号值的变化趋势为增大的相邻小区为信号值增加的相邻小区，并计算目标小区的信号值与信号值增加的相邻小区的差值；
步骤S608，当B小区为信号值增加的相邻小区且大于目标小区的信号值时，或者B小区为信号值增加的相邻小区且目标小区的信号值与信号值增加的相邻小区的差值小于Δα时，其中，Δα为终端发起CSFB业务到建立通话过程中预估的信号值增加的相邻小区的信号值与目标小区的信号值的变化量，选择UARFCNB频点进行CSFB业务。
通过上述步骤，有效地解决了由于终端高速移动导致重定向失败，继而引起CSFB通话失败的问题，使得终端在高速移动时仍然可以选择信号值较好的小区完成CSFB通话的重定向，避免了由于终端的高速移动导致的重定向失败，提高了CSFB通话的质量和用户的体验度。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所 述的方法。
实施例5
在本实施例中还提供了一种CSFB重定向装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图7是根据本发明实施例的CSFB重定向装置的结构框图，如图7所示，该装置包括：第一处理模块72，设置为发起CSFB业务，以及测量终端当前所驻留小区的至少一个相邻小区的第一信号值；第二处理模块74，设置为接收网络侧设备下发的重定向信息，以及测量重定向信息所指示的目标小区的信号值和至少一个相邻小区的第二信号值；确定模块76，设置为比较第一信号值和第二信号值，以及在至少一个相邻小区中确定信号值增加的相邻小区；选择模块78，设置为依据信号值增加的相邻小区的信号值与目标小区的信号值的比较结果，选择与信号值增加的相邻小区对应的频点或者目标小区对应的频点进行CSFB业务。
在一个可选的实施例中，选择模块78还设置为当判断信号值增加的相邻小区的信号值大于目标小区的信号值时，选择信号值增加的相邻小区的频点进行CSFB业务。
在一个可选的实施例中，选择模块78还设置为当判断信号值增加的相邻小区的信号值小于目标小区的信号值时，获取信号值增加的相邻小区的信号值与目标小区的信号值的差值；判断差值是否大于第一预设阈值；当差值大于第一预设阈值时，选择目标小区对应的频点进行CSFB业务；当差值小于第一预设阈值时，选择与信号值增加的相邻小区对应的频点进行CSFB业务。
在一个可选的实施例中，图8是根据本发明可选实施例的CSFB重定 向装置的结构框图，如图8所示，该装置包括判断模块82，设置为在判断终端的移动速度是否大于第二预设阈值，其中，当终端的移动速度大于第二预设阈值时，触发测量终端当前所驻留小区的至少一个相邻小区的第一信号值。
在本实施例中，上述判断模块82可以设置为在发起CSFB业务后，在测量终端当前所驻留小区的至少一个相邻小区的第一信号值之前，判断终端的移动速度是否大于第二预设阈值，其中，当终端的移动速度大于第二预设阈值时，触发测量终端当前所驻留小区的至少一个相邻小区的第一信号值；上述判断模块82也可以设置为在第一处理模块72执行发起CSFB业务，以及测量终端当前所驻留小区的至少一个相邻小区的第一信号值的操作之前，判断终端的移动速度是否大于第二预设阈值，其中，当终端的移动速度大于第二预设阈值时，触发测量终端当前所驻留小区的至少一个相邻小区的第一信号值。
在本实施例中还提供了一种终端，包括：上述任一项上述的CSFB重定向装置。
在本实施例中还提供了一种CSFB重定向的系统，该系统包括：终端22和网络侧设备24，其中，终端22，设置为发起CSFB业务，测量终端22当前所驻留小区的至少一个相邻小区的第一信号值；接收网络侧设备24下发的重定向信息，测量重定向信息所指示的目标小区的信号值和至少一个相邻小区的第二信号值；比较第一信号值和第二信号值，在至少一个相邻小区中确定信号值增加的相邻小区；依据信号值增加的相邻小区的信号值与目标小区的信号值的比较结果，选择与信号值增加的相邻小区对应的频点或者目标小区对应的频点进行CSFB业务；网络侧设备24，设置为向终端22下发重定向信息。
实施例6
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上 述存储介质可以被设置为存储用于执行以下步骤的程序代码：S1，发起CSFB业务，测量终端当前所驻留小区的至少一个相邻小区的第一信号值；S2，接收网络侧设备下发的重定向信息，测量重定向信息所指示的目标小区的信号值和至少一个相邻小区的第二信号值；S3，比较第一信号值和第二信号值，在至少一个相邻小区中确定信号值增加的相邻小区；S4，依据信号值增加的相邻小区的信号值与目标小区的信号值的比较结果，选择与信号值增加的相邻小区对应的频点或者目标小区对应的频点进行CSFB业务。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：当判断信号值增加的相邻小区的信号值大于目标小区的信号值时，选择信号值增加的相邻小区的频点进行CSFB业务。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：当判断信号值增加的相邻小区的信号值小于目标小区的信号值时，获取信号值增加的相邻小区的信号值与目标小区的信号值的差值；判断差值是否大于第一预设阈值；当差值大于第一预设阈值时，选择目标小区对应的频点进行CSFB业务；当差值小于第一预设阈值时，选择与信号值增加的相邻小区对应的频点进行CSFB业务。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：判断终端的移动速度是否大于第二预设阈值，其中，当终端的移动速度大于第二预设阈值时，触发测量终端当前所驻留小区的至少一个相邻小区的第一信号值。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：当相邻小区为多个时，按照第一信号值从大到小的顺序存储相邻小区。
可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：确定多个相邻小区中信号值最大且信号值的变化趋势为增大的相邻小区为信号值增加的相邻小区。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只 读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。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。
工业实用性
本发明实施例提供的技术方案，可以应用于CSFB重定向过程中，测量并比较终端当前所驻留小区的至少一个相邻小区的第一信号值和重定向信息所指示的目标小区的信号值以及至少一个相邻小区的第二信号值，选择与信号值增加的相邻小区对应的频点或者目标小区对应的频点进行CSFB业务，有效地解决了由于终端移动导致重定向失败，继而引起CSFB通话失败的问题，使得终端在移动时仍然可以选择信号值较好的小区完成CSFB通话的重定向，避免了由于终端的移动导致的重定向失败，提高了CSFB通话的质量和用户的体验度。

Claims (14)

  1. 一种电路域回落CSFB重定向方法，包括：
    发起CSFB业务，测量终端当前所驻留小区的至少一个相邻小区的第一信号值；
    接收网络侧设备下发的重定向信息，测量所述重定向信息所指示的目标小区的信号值和所述至少一个相邻小区的第二信号值；
    比较所述第一信号值和所述第二信号值，在所述至少一个相邻小区中确定信号值增加的相邻小区；
    依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务。
  2. 根据权利要求1所述的方法，其中，依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务，包括：
    当判断所述信号值增加的相邻小区的第二信号值大于所述目标小区的信号值时，选择所述信号值增加的相邻小区的频点进行所述CSFB业务。
  3. 根据权利要求1所述的方法，其中，依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务，还包括：
    当判断所述信号值增加的相邻小区的第二信号值小于所述目标小区的信号值时，获取所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的差值；
    判断所述差值是否大于第一预设阈值；
    当所述差值大于所述第一预设阈值时，选择所述目标小区对应的频点进行所述CSFB业务；
    当所述差值小于所述第一预设阈值时，选择与所述信号值增加的相邻小区对应的频点进行所述CSFB业务。
  4. 根据权利要求3所述的方法，其中，其中，所述第一预设阈值为所述终端移动时预先估计的相邻小区之间的信号值的变化量。
  5. 根据权利要求4所述的方法，其中，所述第一预设阈值通过如下公式确定：Δα＝V×t×Δβ×2，其中，V为所述终端的移动速度，t为CSFB过程中从发起呼叫到建立通话的时间，Δβ为所述终端移动时单位距离内的信号值的变化量。
  6. 根据权利要求1至3中任一项所述的方法，其中，测量终端当前所驻留小区的至少一个相邻小区的第一信号值之前，所述方法还包括触发测量所述终端当前所驻留小区的所述至少一个相邻小区的所述第一信号值：判断所述终端的移动速度是否大于第二预设阈值，其中，当所述终端的移动速度大于所述第二预设阈值时，触发测量所述终端当前所驻留小区的所述至少一个相邻小区的所述第一信号值。
  7. 根据权利要求1所述的方法，其中，当所述相邻小区为多个时，按照所述第一信号值从大到小的顺序存储所述相邻小区。
  8. 根据权利要求7所述的方法，其中，在所述多个相邻小区中确定所述信号值增加的相邻小区包括：确定所述多个相邻小区中所述第二信号值最大且信号值的变化趋势为增大的相邻小区为所述信号值增加的相邻小区。
  9. 一种电路域回落CSFB重定向装置，包括：
    第一处理模块，设置为发起CSFB业务，以及测量终端当前所驻 留小区的至少一个相邻小区的第一信号值；
    第二处理模块，设置为接收网络侧设备下发的重定向信息，以及测量所述重定向信息所指示的目标小区的信号值和所述至少一个相邻小区的第二信号值；
    确定模块，设置为比较所述第一信号值和所述第二信号值，以及在所述至少一个相邻小区中确定信号值增加的相邻小区；
    选择模块，设置为依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务。
  10. 根据权利要求9所述的装置，其中，所述选择模块还设置为当判断所述信号值增加的相邻小区的第二信号值大于所述目标小区的信号值时，选择所述信号值增加的相邻小区的频点进行所述CSFB业务。
  11. 根据权利要求9所述的装置，其中，所述选择模块还设置为当判断所述信号值增加的相邻小区的第二信号值小于所述目标小区的信号值时，获取所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的差值；判断所述差值是否大于第一预设阈值；当所述差值大于所述第一预设阈值时，选择所述目标小区对应的频点进行所述CSFB业务；当所述差值小于所述第一预设阈值时，选择与所述信号值增加的相邻小区对应的频点进行所述CSFB业务。
  12. 根据权利要求9至11中任一项所述的装置，其中，所述装置还包括：判断模块，设置为在判断所述终端的移动速度是否大于第二预设阈值，其中，当所述终端的移动速度大于所述第二预设阈值时，触发测量所述终端当前所驻留小区的所述至少一个相邻小区的所述第一信号值。
  13. 一种终端，包括：权利要求9至12中任一项所述的电路域回落CSFB重定向装置。
  14. 一种电路域回落CSFB重定向的系统，包括终端和网络侧设备，其中，
    所述终端，设置为发起CSFB业务，测量所述终端当前所驻留小区的至少一个相邻小区的第一信号值；接收所述网络侧设备下发的重定向信息，测量所述重定向信息所指示的目标小区的信号值和所述至少一个相邻小区的第二信号值；比较所述第一信号值和所述第二信号值，在所述至少一个相邻小区中确定信号值增加的相邻小区；依据所述信号值增加的相邻小区的第二信号值与所述目标小区的信号值的比较结果，选择与所述信号值增加的相邻小区对应的频点或者所述目标小区对应的频点进行所述CSFB业务；
    所述网络侧设备，设置为向所述终端下发所述重定向信息。
PCT/CN2016/104070 2016-07-19 2016-10-31 电路域回落csfb重定向方法、装置、终端及系统 WO2018014461A1 (zh)

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