WO2016065535A1 - 一种网络选择方法和用户设备 - Google Patents

一种网络选择方法和用户设备 Download PDF

Info

Publication number
WO2016065535A1
WO2016065535A1 PCT/CN2014/089700 CN2014089700W WO2016065535A1 WO 2016065535 A1 WO2016065535 A1 WO 2016065535A1 CN 2014089700 W CN2014089700 W CN 2014089700W WO 2016065535 A1 WO2016065535 A1 WO 2016065535A1
Authority
WO
WIPO (PCT)
Prior art keywords
lte
cell
network
type
user equipment
Prior art date
Application number
PCT/CN2014/089700
Other languages
English (en)
French (fr)
Inventor
段小嫣
张博
金辉
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 EP14904651.8A priority Critical patent/EP3091785B1/en
Priority to JP2016554582A priority patent/JP6349409B2/ja
Priority to AU2014409906A priority patent/AU2014409906B2/en
Priority to BR112016021320-3A priority patent/BR112016021320B1/pt
Priority to CN201480027865.5A priority patent/CN105745964B/zh
Priority to PCT/CN2014/089700 priority patent/WO2016065535A1/zh
Publication of WO2016065535A1 publication Critical patent/WO2016065535A1/zh
Priority to US15/250,183 priority patent/US20160381613A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release

Definitions

  • the present invention relates to the field of communications, and in particular, to a network selection method and user equipment.
  • CS Fallback is a long-term evolution of mobile communication access technology (access technology adopted by the fourth generation mobile communication system) (Long Term Evolution, LTE for short) provides voice and other circuit switching.
  • CS for short Circuit Switched, CS for short services (such as CS video, location service, and supplementary service):
  • UE User Equipment
  • 2nd Generation, 2G for short the second generation mobile communication system
  • 3rd Generation, 3G the third generation mobile communication system
  • the UE After the CS network performs voice or other CS services, the UE returns to the LTE network according to the information redirected to the LTE network provided by the network, or returns to the LTE network autonomously.
  • a signaling flow chart for the CSFB service the main steps of the CSFB service include:
  • the UE sends an extended service request (Extended Service Request) to the Mobility Management Entity (MME), which carries a CSFB indication, and is used to indicate that the request is dropped back to the 2G (or 3G) CS domain to establish a voice call.
  • MME Mobility Management Entity
  • the MME sends a UE Context Modification Request (UE Context Modification Request) or a UE Initial Context Request (Initial UE Context Request) carrying the CSFB indication to the Evolved Node B (or E-UTRAN Node B, eNB for short).
  • UE Context Modification Request UE Context Modification Request
  • UE Initial Context Request Initial UE Context Request
  • the eNB sends a message to the UE redirecting to the 2G (or 3G) CS domain, or a message to the 2G (or 3G) CS domain.
  • the UE accesses the 2G (or 3G) network and performs CS services.
  • the MSC Server sends a release connection command to the Base Station Subsystem (BSS) (or Radio Network Subsystem (RNS)), which can carry the CSFB indication.
  • BSS Base Station Subsystem
  • RNS Radio Network Subsystem
  • the BSS (or RNS) sends a wireless connection release message Channel Release (or RRC) to the UE.
  • Connection Release which can carry information redirected to LTE, such as LTE frequency (Frequency), etc., for indicating that the UE returns to the LTE network.
  • the UE selects the LTE cell according to the redirection information in the radio connection release message, or selects the LTE cell autonomously (ie, does not according to the redirection information sent by the network), and returns to the LTE network.
  • the data service may be interrupted for a long time, and the UE It takes a long time to restore the normal registration status of the LTE network.
  • the embodiment of the present invention provides a network selection method and a user equipment, which are used to solve the problem that the data service interruption occurs when the UE residing in the LTE network falls back to the 2G/3G CS network and performs the CS service and returns to the LTE network.
  • the rate at which the UE recovers to the normal registration state of the LTE network is not limited to the following network parameters.
  • a first aspect of the embodiments of the present invention provides a network selection method, including:
  • the user equipment is configured to perform a circuit-switched CS service from the first long-term evolution LTE cell to the second-generation mobile communication system 2G or the third-generation mobile communication system 3G network, where the network type of the first LTE cell is the first type, One type is LTE frequency division multiplexing FDD or LTE time division multiplexing TDD;
  • the user equipment When the user equipment ends the CS service in the 2G or 3G network, the user equipment measures the LTE cell according to the LTE network information, and obtains a measurement result for each LTE cell, where the LTE network information includes an LTE FDD type. Cell information and cell information of the LTE TDD type;
  • the user equipment selects a second LTE cell to access the LTE network from the LTE cell whose measurement result meets the preset condition, and the network type of the second LTE cell is the first type.
  • the LTE network information is LTE network information provided by an access network device in a 2G or 3G network, or The LTE network information stored by the user equipment, or all supported LTE frequency points of the user equipment.
  • the user equipment measures the LTE cell, including:
  • the user equipment performs only the first type of LTE cell according to the LTE network information. the amount;
  • the user equipment selects the second LTE cell to access the LTE network from the LTE cell whose measurement result meets the preset condition, and includes:
  • the user equipment selects the second LTE cell to access the LTE network from the first type of LTE cells whose measurement result meets the preset condition.
  • the user equipment performs only the first type of LTE cell according to the LTE network information. Measurements, including:
  • the user equipment determines a frequency point of the LTE network information that belongs to the first type of frequency band, searches only the frequency points that belong to the first type of frequency band, and continues to measure the searched LTE cell;
  • the user equipment determines a frequency point and/or a cell identifier of the LTE cell corresponding to the first type in the LTE network information, and searching only the LTE cell corresponding to the first type a frequency point and/or a cell identifier, which continues to measure the searched LTE cell, where the stored LTE network information includes a network type of an LTE cell corresponding to a frequency point and/or a cell identifier;
  • the user equipment determines, according to the LTE FDD and/or the LTE TDD indication information that is sent by the 2G or the 3G network, the frequency point and/or the cell identifier of the LTE cell corresponding to the first type, and only searches for the corresponding first The frequency and/or cell identity of the type of LTE cell continues to measure the searched LTE cell.
  • the user equipment performs only the first type of LTE cell according to the LTE network information. Measurements, including:
  • the user equipment searches for an LTE cell according to the LTE network information
  • the user equipment determines, according to whether the uplink frequency point and the downlink frequency point of each searched LTE cell are the same, the network type of each LTE cell that is searched, and only continues to measure the network type as the first type of LTE. Community.
  • the user equipment measures the LTE cell, including:
  • the user equipment measures an LTE FDD cell and an LTE TDD cell according to the LTE network information
  • the user equipment selects the second LTE cell to access the LTE network from the LTE cell whose measurement result meets the preset condition, and includes:
  • the user equipment selects the second LTE cell to access the LTE network, in the LTE cell in which the network type is the first type in the LTE cell in which the measurement result meets the preset condition.
  • the user equipment determines a network of each LTE cell in an LTE cell whose measurement result meets a preset condition.
  • Types including:
  • the user equipment determines, according to the location of the primary synchronization signal PSS and/or the secondary synchronization signal in the frame of each LTE cell, the network type of each LTE cell in the LTE cell that the measurement result meets the preset condition;
  • the user equipment determines, according to the stored LTE network information, a network type of each LTE cell in the LTE cell that the measurement result meets a preset condition, where the stored LTE network information includes a network type of the LTE cell;
  • the user equipment determines, according to the LTE FDD and/or the LTE TDD indication information that is sent by the 2G or the 3G network, the network type of each LTE cell in the LTE cell that the measurement result meets the preset condition;
  • the user equipment determines, according to whether the uplink frequency point and the downlink frequency point of each LTE cell are the same, the network type of each LTE cell in the LTE cell that the measurement result meets the preset condition.
  • a second aspect of the embodiments of the present invention provides a user equipment, including:
  • a fallback module configured to perform a circuit switched CS service from the LTE cell to the 2G or 3G network, where the network type of the first LTE cell is a first type, and the first type is LTE FDD or LTE TDD;
  • a measuring module configured to end when the user equipment performs CS service on the 2G or 3G network Measure the LTE cell according to the LTE network information, and obtain the measurement result for each LTE cell, where the LTE network information includes the LTE FDD type cell information and the LTE TDD type cell information;
  • a selection module configured to select a second LTE cell to access the LTE network from the LTE cell that the measurement result meets the preset condition, where the network type of the second LTE cell is the first type.
  • the measuring module is specifically configured to: when the user equipment performs the CS service end in the 2G or 3G network According to the LTE network information, only the first type of LTE cell is measured, and the measurement result is obtained for each LTE cell, where the LTE network information includes the LTE FDD type cell information and the LTE TDD type cell information;
  • the selecting module is specifically configured to select the second LTE cell to access the LTE network from the first type of LTE cells whose measurement result meets the preset condition, where the network type of the second LTE cell is the first type .
  • the measuring module specifically includes:
  • a first searching unit configured to: when the user equipment ends the CS service in the 2G or 3G network, determine a frequency point of the LTE network information that belongs to the first type of frequency band, and search only the frequency band that belongs to the first type And/or, according to the stored LTE network information, determining a frequency point and/or a cell identifier of the LTE cell corresponding to the first type of the LTE network information, and searching only the LTE cell corresponding to the first type a frequency point and/or a cell identifier; and/or, according to the LTE FDD and/or LTE TDD indication information delivered by the 2G or 3G network, determining a frequency point and/or a cell identifier corresponding to the first type of the LTE cell, and searching only Determining a frequency point and/or a cell identifier corresponding to the first type of LTE cell;
  • a first measurement unit configured to continue to measure the LTE cell searched by the first search unit, to obtain a measurement result for each LTE cell.
  • the measurement module specifically includes:
  • a second searching unit configured to search for an LTE cell according to the LTE network information
  • a second measuring unit configured to: according to a location of a primary synchronization signal and/or a secondary synchronization signal in a frame of each LTE cell searched by the second searching unit, and/or according to each searched by the second searching unit Whether the uplink frequency point and the downlink frequency point of the LTE cell are the same, determining the network type of each LTE cell that is searched, and continuously measuring only the LTE cell whose network type is the first type.
  • the measuring module is specifically configured to: when the user equipment is in the 2G or 3G network When the CS service ends, the LTE FDD cell and the LTE TDD cell are measured according to the LTE network information, and the measurement result is obtained for each LTE cell, where the LTE network information includes the LTE FDD type cell information and the LTE TDD type cell information. ;
  • the selection module specifically includes:
  • a determining unit configured to determine a network type of each LTE cell in the LTE cell that the measurement result meets the preset condition
  • a selecting unit configured to select the second LTE cell to access the LTE network, in the LTE cell in which the network type is the first type in the LTE cell that the measurement result meets the preset condition.
  • the determining unit is specifically configured to: according to a frequency band of each LTE cell belongs to a frequency band of LTE FDD or The frequency band of the LTE TDD, and/or according to the location of the primary synchronization signal PSS and/or the secondary synchronization signal in the frame of each LTE cell, and/or according to the stored LTE network information, and/or according to the 2G or 3G network
  • the LTE FDD and/or the LTE TDD indication information is sent, and/or, according to whether the uplink frequency point and the downlink frequency point of each LTE cell are the same, the network type of each LTE cell in the LTE cell whose measurement result meets the preset condition is determined.
  • the stored LTE network information includes a network type of the LTE cell.
  • a third aspect of the embodiments of the present invention provides a user equipment, including:
  • Input device output device, processor and memory
  • the processor is configured to perform the following steps by calling an operation instruction stored by the memory:
  • the LTE cell is measured according to the LTE network information, and the measurement result of each LTE cell is obtained, where the LTE network information includes the LTE FDD type cell information and the LTE.
  • Cell information of TDD type includes the LTE FDD type cell information and the LTE.
  • the second LTE cell selecting, by the LTE cell that the measurement result meets the preset condition, the second LTE cell to access the LTE network, where the network type of the second LTE cell is the first type.
  • the processor is specifically configured to perform the following steps:
  • the LTE network information When the user equipment performs the CS service end in the 2G or 3G network, according to the LTE network information, only the first type of LTE cell is measured, and the measurement result for each LTE cell is obtained, where the LTE network information is obtained.
  • the LTE FDD type cell information and the LTE TDD type cell information are included therein;
  • the second LTE cell selecting, by the first type of LTE cells that the measurement result meets the preset condition, the second LTE cell to access the LTE network, where the network type of the second LTE cell is the first type.
  • the processor is specifically configured to perform the following steps:
  • LTE FDD and/or LTE TDD indication information delivered by the 2G or 3G network determining a frequency point and/or a cell identifier corresponding to the first type of LTE cell, and searching only the corresponding first type of LTE The frequency and/or cell identity of the cell;
  • the measured LTE cell is continuously measured, and the measurement result for each LTE cell is obtained.
  • the processor is specifically configured to perform the following steps:
  • the network type of the cell only continues to measure the LTE cell whose network type is the first type.
  • the processor is specifically configured to perform the following steps:
  • the LTE FDD cell and the LTE TDD cell are measured according to the LTE network information, and the measurement result for each LTE cell is obtained, where the LTE network information includes Cell information of LTE FDD type and cell information of LTE TDD type;
  • the LTE cell in which the measurement result satisfies the preset condition is a network type of the first type of LTE In the cell, the second LTE cell is selected to access the LTE network.
  • the processor is specifically configured to perform the following steps:
  • the frequency band of the LTE FDD or the frequency band of the LTE TDD and/or according to the location of the primary synchronization signal PSS and/or the secondary synchronization signal in the frame of each LTE cell, and/or according to the stored LTE Network information, and/or, according to the LTE FDD and/or LTE TDD indication information delivered by the 2G or 3G network, and/or according to whether the uplink frequency point and the downlink frequency point of each LTE cell are the same, determining that the measurement result satisfies the pre- The network type of each LTE cell in the LTE cell, where the stored LTE network information includes the network type of the LTE cell.
  • the embodiment of the present invention has the following advantages: in the embodiment of the present invention, after the UE falls back to the 2G/3G network to perform the CS service, the UE is in the LTE TDD and the LTE FDD network edge or overlapping coverage area.
  • the LTE network information on which the LTE network is measured includes the cell information of the LTE FDD type and the cell information of the LTE TDD type.
  • the UE measures the LTE cell according to the LTE network information, and obtains the measurement result of each LTE cell, and then selects the measurement.
  • the second LTE cell in the LTE cell that satisfies the preset condition is the first type (the same network type as the LTE cell where the 2G/3G network is deployed before the CS service is performed), and the LTE network is prevented from returning to the LTE network.
  • the data bearer cannot be recovered due to the network type before the fallback, so that the data bearer can be restored immediately, and the Attach process cannot be initiated multiple times to restore the normal registration status of the LTE network, saving recovery.
  • FIG. 1 is a schematic diagram of a signaling flow of a circuit switched fallback service according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a network selection method according to an embodiment of the present invention.
  • FIG. 3 is another schematic flowchart of a network selection method according to an embodiment of the present invention.
  • FIG. 4 is another schematic flowchart of a network selection method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 6 is another schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.
  • FIG. 8 is another schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of another structure of a user equipment according to an embodiment of the present invention.
  • the term “measuring LTE cell” means that the UE measures the received power RSRP (Reference Signal Received Power) of the reference signal of the LTE cell and/or the reference signal received quality of the reference signal (RSRQ). It can be understood that, in the early stage of the measurement, the UE first performs a cell search, searches the frequency point and/or the cell identifier to obtain the LTE cell, and then measures the reference signal of the searched LTE cell, which specifically includes: the UE scans the frequency of the possible cell.
  • RSRP Reference Signal Received Power
  • the cell reference signal position can be known, and the time slot and frequency can be accurately synchronized by demodulating the reference signal, the cell broadcast information can be received, the cell search process can be completed, and the cell reference signal can be measured. .
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the term "cell information of the LTE FDD type" is used to indicate the information about the LTE cell of the LTE FDD, and may include the LTE FDD frequency point and/or the LTE FDD cell identifier, and may include other information, which is not limited herein.
  • the LTE FDD frequency point indicates that the network type of the corresponding LTE cell is a frequency point of the LTE FDD, and the LTE FDD cell indicates a cell whose network type is LTE FDD.
  • the term "cell information of the LTE TDD type" is used to indicate the information about the LTE cell of the LTE TDD, and may include the LTE TDD frequency point and/or the LTE TDD cell identifier, and may include other information, which is not limited herein.
  • the LTE TDD frequency point indicates that the network type of the corresponding LTE cell is a frequency point of the LTE TDD
  • the LTE TDD cell indicates a cell whose network type is LTE TDD.
  • the redirection information in the wireless connection release message sent by the 2G/3G CS network may be The information of the LTE TDD and the LTE FDD network is also included, and the UE may also independently search for the cells of the LTE TDD and the LTE FDD network, and the UE performs CS voice or other CS services in the 2G/3G CS network, according to the redirection information or When the LTE network is returned to the LTE network, the LTE network may be returned to the normal registration state for a long time.
  • FDD Frequency-Division Duplex
  • an embodiment of the network selection method in the embodiment of the present invention includes:
  • the user equipment is configured to fall back from the first LTE cell to the 2G or 3G network to perform the CS service, where the network type of the first LTE cell is the first type;
  • the UE When the UE receives the redirection sent by the eNB or the message that is handed over to the 2G (or 3G) CS domain, the UE falls back from the first LTE cell to the 2G or 3G network to perform CS service, and the network type of the first LTE cell is One type, the first type is LTE FDD or LTE TDD.
  • the user equipment measures the LTE cell according to the LTE network information, and obtains a measurement result for each LTE cell, where the LTE network information includes the LTE FDD.
  • Type of cell information and cell information of the LTE TDD type are examples of cell information and cell information of the LTE TDD type;
  • the UE When the UE performs the CS service end in the 2G or 3G network, the UE measures the LTE cell according to the LTE network information, and obtains a measurement result for each LTE cell.
  • the LTE network information includes both LTE FDD type cell information and LTE TDD type cell information.
  • the user equipment selects a second LTE cell to access the LTE network from the LTE cell whose measurement result meets the preset condition, where the network type of the second LTE cell is the first type.
  • the user equipment measures the LTE cell according to the LTE network information, and obtains the measurement result of each LTE cell, and selects the second LTE cell to access the LTE network from the LTE cell whose measurement result meets the preset condition, and the network type of the second LTE cell It is the first type, that is, the network type of the LTE cell where the CS service is located before the fallback to the 2G/3G network.
  • the preset condition can be customized according to the protocol or according to actual application scenario requirements.
  • the preset condition may be: the RSRP and/or the RSRQ measurement value of the LTE cell is satisfied.
  • Certain conditions, for example, RSRP and/or RSRQ are greater than or equal to a certain threshold.
  • the RSRP is greater than or equal to -125 dBm, the cell is considered to satisfy the preset condition; the preset condition may also be: broadcast from the LTE cell.
  • the Public Land Mobility Network Identity (PLMN ID) may be parsed in the information, and the PLMN ID is the same as the PLMN ID selected by the UE Non-Access Stratum (NAS) or belongs to the same equivalent PLMN ID. The list is not limited here.
  • the UE measures the LTE network information according to the LTE FDD type in the LTE TDD and the LTE FDD network edge or the overlapping coverage area.
  • the cell information also includes the cell information of the LTE TDD type.
  • the UE measures the LTE cell according to the LTE network information, and after obtaining the measurement result of each LTE cell, selects the network type in the LTE cell in which the measurement result meets the preset condition as the first type.
  • the second LTE cell accessing the LTE network is the same as the network type of the LTE cell in which the 2G/3G network is deployed before the CS service is performed), and avoids the data caused by the network type before returning to the LTE network due to the network type before returning to the LTE network.
  • the problem that the bearer cannot be restored is that the data bearer can be restored immediately, and the Attach process is not required to be restored to the normal registration state of the LTE network, which saves the time for restoring the normal registration state of the LTE network.
  • the user equipment measures the LTE cell according to the LTE network information, which is a measurement phase; and selects the second LTE cell to access the LTE network from the LTE cell whose measurement result meets the preset condition, which is a selection phase.
  • one of the modes is: only the LTE cell of the first type can be measured in the measurement phase, and the LTE is the first type when the phase is selected.
  • the second LTE cell whose network type is the first type is selected to access the LTE network from the LTE cell whose measurement result meets the preset condition; the other mode is: in the measurement phase, to the LTE cell
  • the LTE cell corresponding to the network information is measured.
  • the LTE cell that meets the preset condition may include both the LTE TDD cell and the LTE FDD cell.
  • the network type of each LTE cell needs to be determined first, and then The measurement result and the network type of each LTE cell are selected from the LTE cell whose measurement result meets the preset condition, and the second LTE cell whose network type is the first type is connected to the LTE network. The two methods are specifically described below.
  • another embodiment of the network selection method in the embodiment of the present invention includes:
  • the user equipment is configured to fall back from the first LTE cell to the 2G or 3G network to perform the CS service, where the network type of the first LTE cell is the first type.
  • the UE When the UE receives the redirection sent by the eNB or the message that is handed over to the 2G (or 3G) CS domain, the UE falls back from the first LTE cell to the 2G or 3G network to perform CS service, and the network type of the first LTE cell is One type, the first type is LTE FDD or LTE TDD.
  • the message that is redirected to the 2G (or 3G) CS domain sent by the eNB herein may be: a radio connection release message RRC Connection Release, which is also referred to as RRC: Radio Resource in the present invention; Control, Radio Resource Control Protocol, which may include redirection information.
  • RRC Radio Resource in the present invention
  • Control Radio Resource Control Protocol
  • the redirection information may include 2G (or 3G) CS domain network information; the redirection to the 2G (or 3G) CS domain
  • the message may also be a cell change command message CCO (Cell Change Order), which may include redirection information.
  • CCO Cell Change Order
  • the redirection information may include 2G CS domain network information, and may also be other messages. Make a limit.
  • the message that the eNB sends to switch to the 2G (or 3G) CS domain may be "Mobility from E-UTRA Command", which may include switching to 2G (or 3G).
  • Information about the CS domain network, or other messages, is not limited here.
  • LTE network information includes LTE FDD type cell information and LTE TDD type cell information;
  • the UE When the UE performs the CS service end in the 2G or 3G network, the UE measures the LTE cell according to the LTE network information, and includes the LTE FDD cell information in the LTE TDD and the LTE FDD network edge or the overlapping coverage area. Also includes LTE TDD cell information.
  • the LTE cell needs to be measured according to the LTE network information, and the source of the LTE network information may be different according to the actual network configuration:
  • the LTE network information is the LTE network information provided by the access network device in the 2G or the 3G network
  • the user equipment measures only the first type of the LTE cell according to the LTE network information, where: the user equipment is according to the 2G or The LTE network information provided by the access network device in the 3G network is only measured for the first type of LTE cell.
  • the access network device is provided according to the 2G or 3G network.
  • the user equipment may receive the wireless connection release message sent by the access network device in the 2G or 3G network, and the wireless connection release message carries the redirection before the measurement is performed on the LTE cell of the first type.
  • the redirection information includes the LTE network information, where the LTE network information includes LTE FDD cell information and LTE TDD cell information, where the LTE FDD cell information includes an LTE FDD frequency point and/or an LTE FDD cell identifier, where The LTE TDD cell information includes an LTE TDD frequency point and/or an LTE TDD cell identity.
  • the wireless connection release message may be a Channel Release or RRC Connection Release message
  • the wireless connection release message is an RRC Connection Release message
  • the LTE network information may be provided by a redirect message carried by the wireless connection release message, or may be provided by other information sent by the access network device or the core network device to the UE. There is no limit.
  • the LTE network information is LTE network information stored by the user equipment or all supported LTE frequency points.
  • the user equipment does not receive the LTE network information provided by the access network device.
  • the wireless connection release message sent by the access network device does not carry the redirect message, and the UE autonomously measures the LTE cell; or, the UE receives The LTE network information provided by the access network device is determined, but the LTE network information is not used according to the UE local policy.
  • the wireless connection release message sent by the access network device carries the redirect message but the UE does not use the access network device to send The LTE network information in the redirect message, the UE autonomously measures the LTE cell.
  • the user equipment performs measurement only on the first type of LTE cell according to the LTE network information, that is, the user equipment performs measurement only on the first type of LTE cell according to the stored LTE network information or all supported LTE frequency points.
  • the stored LTE network information includes LTE FDD cell information and LTE TDD cell information, where the LTE FDD cell information includes an LTE FDD frequency point and/or an LTE FDD cell identifier, and the LTE TDD cell information includes an LTE TDD frequency point and / or LTE TDD cell identity; the supported frequency points include LTE FDD frequency points and LTE TDD frequency points.
  • the user equipment performs measurement only on the first type of LTE cell according to the LTE network information, and the implementation manners are various, and are specifically divided into two types:
  • the first type of mode before the cell search is performed in the early stage of the measurement phase, the network type of the LTE cell corresponding to the MF network information intermediate frequency point or the cell identifier is first distinguished, and only the frequency point corresponding to the first type of LTE cell or Cell ID is measured:
  • the user equipment determines a frequency point of the LTE network information that belongs to the first type of frequency band, searches only the frequency points that belong to the first type of frequency band, and continues to measure the searched LTE cell.
  • the user equipment determines, according to the stored LTE network information, a frequency point and/or a cell identifier of the LTE cell corresponding to the first type, and only searches for a frequency point and/or a cell corresponding to the first type of the LTE cell. And identifying, searching for the LTE cell that is searched, where the stored LTE network information includes a network type of the LTE cell corresponding to the frequency point and/or the cell identifier.
  • the user equipment determines, according to the LTE FDD and/or the LTE TDD indication information that is sent by the 2G or the 3G network, the frequency point and/or the cell identifier of the LTE cell corresponding to the first type, and only searches for the corresponding first type.
  • the frequency and/or cell identity of the LTE cell continues to measure the searched LTE cell.
  • the second type of mode the user equipment first searches for the LTE cell according to the LTE network information, and then determines the network type of each LTE cell according to the information of the searched LTE cell, and continues to measure only the LTE cell of the first type:
  • the user equipment determines the network type of each LTE cell that is searched according to the location of the primary synchronization signal and/or the secondary synchronization signal in the frame of each LTE cell that is searched, and only continues to measure the network type as the first type of LTE. Community.
  • the PSS is sent in the last symbol of the first slot of subframes 0 and 5, and the SSS is sent in the same slot as the PSS in the same subframe, but the SSS is in the reciprocal
  • a symbol is ahead of the PSS;
  • the PSS is sent in the third symbol of subframes 1 and 6 (ie, DwPTS: Downlink Pilot Time Slot), and SSS is in the third symbol.
  • the last symbol of subframes 0 and 5 is sent, 3 symbols ahead of PSS.
  • the user equipment determines, according to whether the uplink frequency point and the downlink frequency point of each LTE cell that are searched are the same, the network type of each LTE cell that is searched, if the same is the LTE TDD cell, otherwise the LTE FDD cell. Only continue to measure the network type as the first type of LTE cell.
  • the user equipment selects a second LTE cell to access the LTE network from the LTE cell of the first type that the measurement result meets the preset condition, where the network type of the second LTE cell is the first type.
  • the user equipment only measures the LTE cell of the first type, and after obtaining the measurement result of each LTE cell, the measurement result satisfies the preset condition.
  • the LTE cell is selected to access the LTE network in the LTE cell
  • the network type of the second LTE cell is the first type, that is, the network type of the LTE cell where the LTE cell is located before the CS service is returned to the 2G/3G network.
  • the preset condition LTE cell includes multiple first type LTE cells and the first type of LTE cells have different Public Land Mobility Network Identity (PLMN ID), and the UE selects and drops before the fall.
  • PLMN ID Public Land Mobility Network Identity
  • the LTE cell has the same PLMN ID or the LTE cell corresponding to the PLMN ID in the same equivalent PLMN ID list as the PLMN ID of the LTE cell before the fallback, or selects a higher priority than the PLMN ID of the LTE cell before the fallback.
  • the LTE cell corresponding to the PLMN ID For example, if the network type of the LTE network before the fallback is LTE FDD, and the PLMN ID of the LTE network before the fallback is the PLMN ID1, if the UE measures multiple LTE FDD cells of the first type, the UE selects the PLMN ID as the PLMN ID1.
  • the user equipment in the measurement phase, only measures the LTE cell whose network type is the first type, and does not measure the LTE cell with different network types of the LTE cell before the fallback, thereby saving system consumption and speeding up the correct joining.
  • the rate of the LTE network in the measurement phase, the user equipment only measures the LTE cell whose network type is the first type, and does not measure the LTE cell with different network types of the LTE cell before the fallback, thereby saving system consumption and speeding up the correct joining.
  • the rate of the LTE network in the measurement phase, the user equipment only measures the LTE cell whose network type is the first type, and does not measure the LTE cell with different network types of the LTE cell before the fallback, thereby saving system consumption and speeding up the correct joining.
  • the rate of the LTE network in the measurement phase, the user equipment only measures the LTE cell whose network type is the first type, and does not measure the LTE cell with different network types of the LTE cell before the fallback, thereby saving system consumption and speeding
  • the LTE cell is measured, and the LTE cell of the first type is selected in the selection phase.
  • another embodiment of the network selection method in the embodiment of the present invention includes:
  • the user equipment returns from the first LTE cell to the 2G or 3G network to perform the CS service, where the network type of the first LTE cell is the first type.
  • step 301 Similar to step 301, it will not be described here.
  • the user equipment When the user equipment ends the CS service in the 2G or 3G network, the user equipment measures the LTE FDD cell and the LTE TDD cell according to the LTE network information, and obtains a measurement result for each LTE cell.
  • the UE When the UE performs the CS service end in the 2G or 3G network, the UE measures the LTE FDD cell and the LTE TDD cell according to the LTE network information, and obtains measurement results for each LTE cell, and overlaps or overlaps between the LTE TDD and the LTE FDD network.
  • the LTE cell needs to be measured according to the LTE network information, and the source of the LTE network information may be different according to the actual network configuration:
  • the LTE network information is the LTE network information provided by the access network device in the 2G or 3G network
  • the user equipment measures the LTE FDD cell and the LTE TDD cell according to the LTE network information, where: the user equipment is according to the 2G or 3G network.
  • the LTE network information provided by the medium access network device measures the LTE FDD cell and the LTE TDD cell.
  • the user equipment may receive the wireless connection release sent by the access network device in the 2G or 3G network.
  • the LTE network information includes the LTE FDD cell information and the LTE TDD cell information, where the LTE FDD cell information includes the LTE FDD.
  • the LTE FDD cell information includes the LTE FDD.
  • a frequency point and/or an LTE FDD cell identity the LTE TDD cell information including an LTE TDD frequency point and/or an LTE TDD cell identity.
  • the wireless connection release message may be a Channel Release or RRC Connection Release message
  • the wireless connection release message is an RRCConnection Release message
  • the LTE network information may be provided by a redirect message carried by the wireless connection release message, or may be provided by other information sent by the access network device or the core network device to the UE. There is no limit.
  • the LTE network information is LTE network information stored by the user equipment or all supported LTE frequency points, for example, the user equipment does not receive the LTE network information provided by the access network device, specifically, for example, sent by the access network device.
  • the wireless connection release message does not carry the redirect message, and the UE autonomously measures the LTE cell; or the UE receives the LTE network information provided by the access network device but decides not to use the LTE network information according to the UE local policy, for example, access
  • the wireless connection release message sent by the network device carries the redirect message but the UE does not use the LTE network information in the redirect message sent by the access network device, and the UE autonomously measures the LTE cell, and the user equipment according to the LTE network
  • the LTE FDD cell and the LTE TDD cell are measured by the user equipment, and the user equipment measures the LTE FDD cell and the LTE TDD cell according to the stored LTE network information or all supported LTE frequency points.
  • the stored LTE network information includes LTE FDD cell information and LTE TDD cell information, where the stored LTE network information includes LTE FDD cell information and LTE TDD cell information, where the LTE FDD cell information includes an LTE FDD frequency point and And LTE FDD cell identifier, the LTE TDD cell information includes an LTE TDD frequency point and/or an LTE TDD cell identifier; the supported frequency points include an LTE FDD frequency point and an LTE TDD frequency point.
  • the user equipment determines a network type of each LTE cell in an LTE cell whose measurement result meets a preset condition.
  • the network type of each LTE cell in the LTE cell whose measurement result meets the preset condition is determined.
  • the user equipment determines, according to the frequency band of the LTE FDD, the frequency band of the LTE FDD or the frequency band of the LTE TDD, the network type of each LTE cell in the LTE cell that the measurement result meets the preset condition;
  • the user equipment determines, according to the location of the primary synchronization signal PSS and/or the secondary synchronization signal in the frame of each LTE cell, the network type of each LTE cell in the LTE cell that the measurement result meets the preset condition; specifically, For FDD, the PSS is sent in the last symbol of the first slot of subframes 0 and 5. The SSS is sent in the same slot as the PSS in the same subframe, but the SSS is in the penultimate symbol, one symbol ahead of the PSS; For TDD, the PSS is sent in the third symbol of subframes 1 and 6 (ie, DwPTS), and the SSS is sent in the last symbol of subframes 0 and 5, three symbols ahead of PSS.
  • FDD the PSS is sent in the last symbol of the first slot of subframes 0 and 5.
  • the SSS is sent in the same slot as the PSS in the same subframe, but the SSS is in the penultimate symbol, one symbol ahead of the PSS;
  • the PSS is
  • the user equipment determines, according to the stored LTE network information, a network type of each LTE cell in the LTE cell that the measurement result meets a preset condition, where the stored LTE network information includes a network type of the LTE cell;
  • the user equipment determines, according to the LTE FDD and/or the LTE TDD indication information that is sent by the 2G or the 3G network, the network type of each LTE cell in the LTE cell that the measurement result meets the preset condition;
  • the user equipment is configured according to whether an uplink frequency point and a downlink frequency point of each LTE cell are the same. Determining the network type of each LTE cell in the LTE cell in which the measurement result meets the preset condition, if the same is the LTE TDD cell, otherwise the LTE FDD cell.
  • each LTE cell in the measured LTE cell may be used separately or in combination, and may also have other LTE cells that determine that the measurement result satisfies the preset condition.
  • the manner of the network type of each LTE cell is not limited herein.
  • the user equipment selects a second LTE cell to access an LTE network, where the network type of the second LTE cell is an LTE cell, where the network type of the LTE cell in which the measurement result meets the preset condition is the first type.
  • the first type is the network type of the LTE cell in which the measurement result meets the preset condition.
  • the network type of each LTE cell in the LTE cell that the measurement result meets the preset condition After determining, by the user equipment, the network type of each LTE cell in the LTE cell that the measurement result meets the preset condition, selecting the second LTE cell from the LTE cell in which the network type is the first type in the LTE cell whose measurement result meets the preset condition
  • the network type of the second LTE cell is the first type, that is, the same as the network type of the LTE cell where the 2G/3G network is deployed before the CS service is executed.
  • the measurement result that the measurement result meets the preset condition may be the LTE cell in the LTE cell with the network type being the first type.
  • the LTE cell in which the measurement result satisfies the preset condition can be selected to have the highest reference signal strength and/or the best reference signal quality in the LTE cell of the first type.
  • the LTE cell in the LTE cell measured by the UE is the first type of LTE cell, if the UE measures the LTE cell according to the actual situation, or the protocol.
  • PLMN ID Public Land Mobility Network Identity
  • the UE selects the same as the PLMN ID of the LTE cell before the fallback or the LTE cell before the fallback.
  • the PLMN ID belongs to the LTE cell corresponding to the PLMN ID in the same equivalent PLMN ID list, or selects the LTE cell before the fallback.
  • the PLMN ID is compared to the LTE cell corresponding to the higher priority PLMN ID.
  • the UE selects the PLMN ID as the PLMN ID1. Or the LTE FDD cell corresponding to the PLMN ID in the same equivalent PLMN list as the PLMN ID1, or the LTE FDD cell corresponding to the PLMN ID whose priority is higher than the PLMN ID1, which is not limited herein.
  • the UE does not need to change the existing technology in the measurement phase, and only needs to determine the network type of the LTE cell whose measurement result meets the preset condition in the measurement phase, and then the preset is satisfied from the measurement result.
  • the LTE cell in the conditional LTE cell the LTE cell of the first type is selected, and the second LTE network is selected to achieve the effect of selecting the second LTE cell with the same network type as the first LTE cell before the fallback to return to the LTE network, thereby saving recovery.
  • the time to the normal registration state of the LTE network improves the rate at which the UE recovers to the normal registration state of the LTE network.
  • the user equipment is configured to fall back from the first LTE cell to the 2G or 3G network to perform the CS service.
  • the specific process may be: the user equipment falls back from the LTE cell to the 2G or 3G network, and the packet switched data bearer is suspended or switched to The 2G or 3G network performs the CS service on the 2G or 3G network.
  • the user equipment can detect whether the packet switched data bearer is successfully restored or is in the network. An activation state; if the packet-switched data bearer is restored or in an active state, the user equipment initiates a tracking area update TAU procedure in the second LTE cell; otherwise, the user equipment initiates LTE attachment in the second LTE cell process.
  • the UE may reselect the LTE cell whose network type is different from the first type, initiate a TAU or LTE Attach procedure, and register to the LTE FDD network.
  • the UE does not measure the LTE cell whose network type is different from the first type. In this case, the UE needs to measure the LTE cell whose network type is different from the first type.
  • the TAU process may be a combined tracking area and a location area update (Combined TA/LA Updating) process, or a combined tracking area and location area update, accompanied by an IMSI Attach (IMSI Attach) process; LTE
  • the attach process may be a combined evolved packet system and an IMSI Attached (IMSI Attach) process.
  • the MME may initiate a Location Area Updating (CS LAU) or IMSI Attach (IMSI Attach) process, that is, a CS registration process, to the MSC Server.
  • CS LAU Location Area Updating
  • IMSI Attach IMSI Attach
  • an embodiment of the user equipment in the embodiment of the present invention includes:
  • the fallback module 501 is configured to perform a circuit switched CS service from the LTE cell to the 2G or 3G network, where the network type of the first LTE cell is a first type, and the first type is an LTE FDD Or LTE TDD;
  • the measurement module 502 is configured to: when the user equipment ends the CS service in the 2G or 3G network, measure the LTE cell according to the LTE network information, and obtain a measurement result for each LTE cell, where the LTE network information includes the LTE FDD Type of cell information and cell information of the LTE TDD type;
  • the selecting module 503 is configured to select a second LTE cell to access the LTE network from the LTE cell whose measurement result meets the preset condition, where the network type of the second LTE cell is the first type.
  • the measurement module 502 measures the LTE network information according to the LTE network, including LTE.
  • the cell information of the FDD type also includes the cell information of the LTE TDD type.
  • the measurement module 502 measures the LTE cell according to the LTE network information, and after obtaining the measurement result for each LTE cell, the selecting module 503 selects the LTE in which the measurement result satisfies the preset condition.
  • the second LTE cell in the cell is in the first type (the same network type as the LTE cell where the 2G/3G network is deployed before the CS service is executed), and the second LTE cell is accessed to the LTE network, and the return to the LTE network is avoided.
  • the LTE network information may be of various types, and may be LTE network information provided by the access network device in the 2G or 3G network, or may be the LTE network information stored by the user equipment, or may be All supported LTE frequency points of the user equipment are not limited herein.
  • the selecting module 503 selects the second LTE cell to access the LTE network, and therefore requires a process of determining the network type of the LTE cell. In an actual application, the process may be performed by the measuring module 502 or by the selecting module. 503 to complete:
  • the measurement module 502 is specifically configured to: when the user equipment ends the CS service on the 2G or 3G network, according to the LTE network information, only the first The measurement is performed on the LTE cell, and the LTE network information includes the LTE FDD type cell information and the LTE TDD type cell information.
  • the selecting module 503 is specifically configured to: use the first type of LTE that meets preset conditions from the measurement result.
  • the second LTE cell is selected to access the LTE network, and the network type of the second LTE cell is the first type.
  • the process of determining the network type of the LTE cell is completed by the measurement module 502.
  • the measurement module 502 is configured to perform measurement only on the LTE cell of the first type according to the LTE network information, and the first method is to determine the LTE frequency or the cell identifier before searching for the cell.
  • the network type of the LTE cell searches for only the frequency point and/or the cell identifier of the LTE cell corresponding to the first type, and the other is that the LTE cell is searched first, and then the LTE network type of the searched LTE cell is determined;
  • the measurement module 502 in the embodiment shown in FIG. 5 specifically includes:
  • a first search unit 601 configured to: when the user equipment ends the CS service in the 2G or 3G network, determine a frequency point of the LTE network information that belongs to the first type of frequency band, and only search for the first type a frequency point of the frequency band; and/or, according to the stored LTE network information, determining a frequency point and/or a cell identifier of the LTE cell corresponding to the first type of the LTE network information, and searching only the LTE cell corresponding to the first type
  • the frequency point and/or the cell identifier of the LTE cell corresponding to the first type is determined according to the LTE FDD and/or LTE TDD indication information delivered by the 2G or 3G network, and only the search is performed.
  • the first measurement unit 602 is configured to continue to measure the LTE cell searched by the first search unit 601 to obtain a measurement result for each LTE cell.
  • the first search unit 601 determines the network type of the LTE cell corresponding to the frequency point or the cell identifier before searching for the cell, and only searches for the frequency point and/or the cell identifier of the LTE cell corresponding to the first type.
  • the measurement module 502 in the embodiment shown in FIG. 5 specifically includes:
  • a second searching unit 701 configured to search for an LTE cell according to the LTE network information
  • a second measurement unit 702 configured to search for a location of a primary synchronization signal and/or a secondary synchronization signal in a frame of each LTE cell searched by the second search unit 701, and/or according to the second search unit. Whether the uplink frequency point and the downlink frequency point of each LTE cell are the same, the network type of each LTE cell that is searched is determined, and only the LTE cell whose network type is the first type is continuously measured.
  • the second searching unit 701 searches for the LTE cell directly according to the LTE network information.
  • the second measurement unit 702 first determines the network type of the searched LTE cell, and then measures the searched LTE cell.
  • the measurement module 502 is specifically configured to be used when the user equipment performs the CS service on the 2G or 3G network. And measuring the LTE FDD cell and the LTE TDD cell according to the LTE network information, and obtaining a measurement result for each LTE cell, where the LTE network information includes the LTE FDD type cell information and the LTE TDD type cell information;
  • the selecting module 503 specifically includes:
  • a determining unit 801 configured to determine a network type of each LTE cell in an LTE cell whose measurement result meets a preset condition
  • the selecting unit 802 is configured to select the second LTE cell to access the LTE network, in the LTE cell in which the network type is the first type in the LTE cell that the measurement result meets the preset condition.
  • the determining unit 801 is specifically configured to: according to the frequency band of each LTE cell belongs to a frequency band of LTE FDD or a frequency band of LTE TDD, and/or according to a primary synchronization signal PSS in a frame of each LTE cell And/or the location of the secondary synchronization signal, and/or according to the stored LTE network information, and/or according to the LTE FDD and/or LTE TDD indication information delivered by the 2G or 3G network, and/or according to each LTE cell Whether the uplink frequency point is the same as the downlink frequency point, and determining the network type of each LTE cell in the LTE cell in which the measurement result meets the preset condition, where the stored LTE network information includes the network type of the LTE cell.
  • the process of determining the network type of the LTE cell is completed by the determining unit 801 in the measurement module 502.
  • another embodiment of the user equipment 900 in the embodiment of the present invention includes:
  • the input device 901, the output device 902, the processor 903, and the memory 904 (wherein the number of processors 903 in the user device 900 may be one or more, and one processor 903 is taken as an example in FIG. 9).
  • the input device 901, the output device 902, the processor 903, and the memory 904 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.
  • the processor 903 is configured to perform the following steps by calling an operation instruction stored in the memory 904:
  • the first LTE The network type of the cell is the first type, and the first type is LTE FDD or LTE TDD;
  • the LTE cell is measured according to the LTE network information, and the measurement result of each LTE cell is obtained, where the LTE network information includes the LTE FDD type cell information and the LTE.
  • Cell information of TDD type includes the LTE FDD type cell information and the LTE.
  • the second LTE cell selecting, by the LTE cell that the measurement result meets the preset condition, the second LTE cell to access the LTE network, where the network type of the second LTE cell is the first type;
  • the processor 903 is specifically configured to perform the following steps:
  • the LTE network information When the user equipment performs the CS service end in the 2G or 3G network, according to the LTE network information, only the first type of LTE cell is measured, and the measurement result for each LTE cell is obtained, where the LTE network information is obtained.
  • the LTE FDD type cell information and the LTE TDD type cell information are included therein;
  • the second LTE cell Selecting, by the first type of LTE cells that the measurement result meets the preset condition, the second LTE cell to access the LTE network, where the network type of the second LTE cell is the first type;
  • the processor 903 is specifically configured to perform the following steps:
  • LTE FDD and/or LTE TDD indication information delivered by the 2G or 3G network determining a frequency point and/or a cell identifier corresponding to the first type of LTE cell, and searching only the corresponding first type of LTE The frequency and/or cell identity of the cell;
  • the processor 903 is specifically configured to perform the following steps:
  • the network type of the cell only continues to measure the LTE cell whose network type is the first type.
  • the processor 903 is specifically configured to perform the following steps:
  • the LTE FDD cell and the LTE TDD cell are measured according to the LTE network information, and the measurement of each LTE cell is obtained.
  • the LTE network information includes cell information of an LTE FDD type and cell information of an LTE TDD type;
  • the processor 903 is specifically configured to perform the following steps:
  • the frequency band of the LTE FDD or the frequency band of the LTE TDD and/or according to the location of the primary synchronization signal PSS and/or the secondary synchronization signal in the frame of each LTE cell, and/or according to the stored LTE Network information, and/or, according to the LTE FDD and/or LTE TDD indication information delivered by the 2G or 3G network, and/or according to whether the uplink frequency point and the downlink frequency point of each LTE cell are the same, determining that the measurement result satisfies the pre- The network type of each LTE cell in the LTE cell, where the stored LTE network information includes the network type of the LTE cell.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明实施例公开了一种网络选择方法和用户设备，用于解决驻留在LTE网络的UE回落到2G/3G CS网络执行完CS业务后，返回LTE网络时数据业务中断的问题，提高该UE恢复到LTE网络正常注册状态的速率。本发明实施例方法包括：用户设备从第一LTE小区回落到2G或3G网络执行CS业务，该第一LTE小区的网络类型为第一类型，当该用户设备在2G或3G网络执行CS业务结束时，根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，该第二LTE小区的网络类型为所述第一类型。

Description

一种网络选择方法和用户设备 技术领域
本发明涉及通信领域，尤其涉及一种网络选择方法和用户设备。
背景技术
电路交换回落(CS Fallback，简称：CSFB)是一种长期演进的移动通信接入技术(第四代移动通信系统采用的接入技术)(Long Term Evolution，简称：LTE)提供语音和其它电路交换(Circuit Switched，简称：CS)业务(例如CS视频、定位业务、补充业务)的方案，是指：用户设备(User Equipment,简称：UE)驻留在LTE网络，当要发起或响应语音呼叫或其它CS业务时，再到第二代移动通信系统(2nd Generation,简称：2G)/第三代移动通信系统(3rd Generation,简称：3G)CS网络执行语音或其它CS业务，当在2G/3G CS网络执行语音或其它CS业务结束后，UE根据网络提供的重定向到LTE网络的信息返回LTE网络，或自主返回LTE网络。
如图1所示，为CSFB业务一个信令流程图，CSFB业务主要步骤包括：
1.UE向移动管理实体(Mobility Management Entity,简称：MME)发送扩展业务请求(Extended Service Request)，其中携带CSFB指示，用于指示请求回落到2G(或3G)CS域建立语音呼叫。
2.MME向演进基站(Evolved Node B,or E-UTRAN Node B,简称：eNB)发送携带CSFB指示的UE上下文修改请求(UE Context Modification Request)或UE初始上下文请求消息(Initial UE Context Request)。
3.eNB向UE发送重定向到2G(或3G)CS域的消息，或切换到2G(或3G)CS域的消息。
4.UE接入到2G(或3G)网络，执行CS业务。
5.CS业务结束后，MSC Server向基站子系统(Base Station Subsystem,简称：BSS)(或无线网络子系统(Radio Network Subsystem,简称：RNS))发送释放连接命令，其中可以携带CSFB指示，用于指示BSS(或RNS)令UE返回LTE网络。
6.BSS(或RNS)向UE发送无线连接释放消息Channel Release(或RRC  Connection Release)，其中可以携带重定向到LTE的信息，例如LTE频点(即频率，Frequency)等，用于指示UE回到LTE网络。
7.UE根据无线连接释放消息中的重定向信息选择LTE小区，或自主(即不依据网络下发的重定向信息)选择LTE小区，返回LTE网络。
然而，在实际应用过程中，当UE在2G/3G CS网络中执行CS语音或其它CS业务结束，根据重定向信息或自主返回LTE网络时，可能会造成数据业务长时间中断的情况，且UE需要经较长时间才能恢复到LTE网络正常注册状态。
发明内容
本发明实施例提供了一种网络选择方法和用户设备，用于解决驻留在LTE网络的UE回落到2G/3G CS网络执行完CS业务后，返回LTE网络时数据业务中断的问题，提高该UE恢复到LTE网络正常注册状态的速率。
本发明实施例第一方面提供了一种网络选择方法，包括：
用户设备从第一长期演进LTE小区回落到第二代移动通讯系统2G或第三代移动通讯系统3G网络执行电路交换CS业务，所述第一LTE小区的网络类型为第一类型，所述第一类型为LTE频分复用FDD或LTE时分复用TDD；
当所述用户设备在所述2G或3G网络执行CS业务结束时，所述用户设备根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
所述用户设备从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
结合本发明实施例的第一方面，本发明实施例第一方面的第一种实现方式中，所述LTE网络信息为2G或3G网络中接入网设备提供的LTE网络信息，或为所述用户设备存储的LTE网络信息，或为所述用户设备所有支持的LTE频点。
结合本发明实施例的第一方面或第一方面的第一种实现方式，本发明实施例第一方面的第二种实现方式中，所述用户设备根据LTE网络信息测量LTE小区，包括：
所述用户设备根据所述LTE网络信息，仅对第一类型的LTE小区进行测 量；
所述用户设备从测量结果满足预置条件的LTE小区中选择所述第二LTE小区接入LTE网络，包括：
所述用户设备从测量结果满足预置条件的第一类型的LTE小区中选择所述第二LTE小区接入LTE网络。
结合本发明实施例第一方面的第二种实现方式，本发明实施例第一方面的第三种实现方式中，所述用户设备根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，包括：
所述用户设备确定所述LTE网络信息中属于第一类型频带的频点，仅搜索所述属于第一类型频带的频点，继续测量搜索到的LTE小区；
和/或，所述用户设备根据存储的LTE网络信息，确定所述LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识，继续测量搜索到的LTE小区，所述存储的LTE网络信息中包括频点和/或小区标识对应的LTE小区的网络类型；
和/或，所述用户设备根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识，继续测量搜索到的LTE小区。
结合本发明实施例第一方面的第二种实现方式，本发明实施例第一方面的第四种实现方式中，所述用户设备根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，包括：
所述用户设备根据所述LTE网络信息，搜索LTE小区；
所述用户设备根据搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区；
和/或，所述用户设备根据所述搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。
结合本发明实施例的第一方面或第一方面的第一种实现方式，本发明实施例第一方面的第五种实现方式中，所述用户设备根据LTE网络信息测量LTE小区，包括：
所述用户设备根据所述LTE网络信息，测量LTE FDD小区和LTE TDD小区；
所述用户设备从测量结果满足预置条件的LTE小区中选择所述第二LTE小区接入LTE网络，包括：
所述用户设备确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
所述用户设备从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择所述第二LTE小区接入LTE网络。
结合本发明实施例第一方面的第五种实现方式，本发明实施例第一方面的第六种实现方式中，所述用户设备确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型，包括：
所述用户设备根据各LTE小区的频点属于LTE FDD的频带或LTE TDD的频带，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
和/或，所述用户设备根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
和/或，所述用户设备根据存储的LTE网络信息，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型；
和/或，所述用户设备根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
和/或，所述用户设备根据各LTE小区的上行频点与下行频点是否相同，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型。
本发明实施例第二方面提供了一种用户设备，包括：
回落模块，用于从LTE小区回落到2G或3G网络执行电路交换CS业务，所述第一LTE小区的网络类型为第一类型，所述第一类型为LTE FDD或LTETDD；
测量模块，用于当所述用户设备在所述2G或3G网络执行CS业务结束 时，根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
选择模块，用于从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
结合本发明实施例的第二方面，本发明实施例第二方面的第一种实现方式中，所述测量模块具体用于，当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
所述选择模块具体用于，从测量结果满足预置条件的第一类型的LTE小区中选择所述第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
结合本发明实施例第二方面的第一种实现方式，本发明实施例第二方面的第二种实现方式中，所述测量模块具体包括：
第一搜索单元，用于当所述用户设备在所述2G或3G网络执行CS业务结束时，确定所述LTE网络信息中属于第一类型频带的频点，仅搜索所述属于第一类型频带的频点；和/或，根据存储的LTE网络信息，确定所述LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；
第一测量单元，用于继续测量所述第一搜索单元搜索到的LTE小区，得到对各LTE小区的测量结果。
结合本发明实施例第二方面的第二种实现方式，本发明实施例第二方面的第三种实现方式中，所述测量模块具体包括：
第二搜索单元，用于根据所述LTE网络信息，搜索LTE小区；
第二测量单元，用于根据所述第二搜索单元搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，和/或，根据所述第二搜索单元搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。
结合本发明实施例第二方面的第二种实现方式，本发明实施例第二方面的第四种实现方式中，所述测量模块具体用于，当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，测量LTE FDD小区和LTETDD小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
所述选择模块具体包括：
确定单元，用于确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
选择单元，用于从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择所述第二LTE小区接入LTE网络。
结合本发明实施例第二方面的第四种实现方式，本发明实施例第二方面的第五种实现方式中，所述确定单元具体用于，根据各LTE小区的频点属于LTEFDD的频带或LTE TDD的频带，和/或，根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，和/或，根据存储的LTE网络信息，和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，和/或，根据各LTE小区的上行频点与下行频点是否相同，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型。
本发明实施例第三方面提供了一种用户设备，包括：
输入装置、输出装置、处理器和存储器；
通过调用所述存储器存储的操作指令，所述处理器，用于执行如下步骤：
从LTE小区回落到2G或3G网络执行电路交换CS业务，所述第一LTE小区的网络类型为第一类型，所述第一类型为LTE FDD或LTE TDD；
当所述用户设备在所述2G或3G网络执行CS业务结束时，根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
结合本发明实施例的第三方面，本发明实施例第三方面的第一种实现方式中，所述处理器具体用于执行如下步骤：
当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
从测量结果满足预置条件的第一类型的LTE小区中选择所述第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
结合本发明实施例第三方面的第一种实现方式，本发明实施例第三方面的第二种实现方式中，所述处理器具体用于执行如下步骤：
当所述用户设备在所述2G或3G网络执行CS业务结束时，确定所述LTE网络信息中属于第一类型频带的频点，仅搜索所述属于第一类型频带的频点；和/或，根据存储的LTE网络信息，确定所述LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；
继续测量搜索到的LTE小区，得到对各LTE小区的测量结果。
结合本发明实施例第三方面的第一种实现方式，本发明实施例第三方面的第三种实现方式中，所述处理器具体用于执行如下步骤：
根据所述LTE网络信息，搜索LTE小区；
根据搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，和/或，根据搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。
结合本发明实施例的第三方面，本发明实施例第三方面的第四种实现方式中，所述处理器具体用于执行如下步骤：
当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，测量LTE FDD小区和LTE TDD小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE 小区中，选择所述第二LTE小区接入LTE网络。
结合本发明实施例第三方面的第四种实现方式，本发明实施例第三方面的第五种实现方式中，所述处理器具体用于执行如下步骤：
根据各LTE小区的频点属于LTE FDD的频带或LTE TDD的频带，和/或，根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，和/或，根据存储的LTE网络信息，和/或，根据2G或3G网络下发的LTE FDD和/或LTETDD指示信息，和/或，根据各LTE小区的上行频点与下行频点是否相同，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型。
从以上技术方案可以看出，本发明实施例具有以下优点：本发明实施例中，在LTE TDD与LTE FDD网络边缘或重叠覆盖区域，UE回落到2G/3G网络执行CS业务结束后，该UE测量LTE网络所依据的LTE网络信息中既包括LTEFDD类型的小区信息，也包括LTE TDD类型的小区信息，UE依据该LTE网络信息测量LTE小区，得到对各LTE小区的测量结果后，选择其中测量结果满足预置条件的LTE小区中网络类型为第一类型(与回落到2G/3G网络执行CS业务前所在的LTE小区的网络类型相同)的第二LTE小区接入LTE网络，避免了返回到LTE网络后，由于与回落前网络类型不同而导致的数据承载无法恢复的问题，使得数据承载能马上恢复，且不再需要多次发起Attach过程才能恢复到LTE网络正常注册状态，节省了恢复到LTE网络正常注册状态的时间。
附图说明
图1为本发明实施例中电路交换回落业务一个信令流程示意图；
图2为本发明实施例中网络选择方法一个流程示意图；
图3为本发明实施例中网络选择方法另一个流程示意图；
图4为本发明实施例中网络选择方法另一个流程示意图；
图5为本发明实施例中用户设备一个结构示意图；
图6为本发明实施例中用户设备另一个结构示意图；
图7为本发明实施例中用户设备另一个结构示意图；
图8为本发明实施例中用户设备另一个结构示意图；
图9为本发明实施例中用户设备另一个结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
此处在本发明的描述中使用的术语是用于描述特定实施例的目的并且不旨在作为对本发明的限制。
术语“测量LTE小区”表示UE对LTE小区的参考信号的接收功率RSRP(Reference Signal Received Power)和/或参考信号的质量RSRQ(Reference Signal Received Quality)进行测量。可以理解的是，在测量的前期，UE首先要进行小区搜索，搜索频点和/或小区标识得到LTE小区，再测量搜索到的LTE小区的参考信号，具体包括：UE扫描可能存在小区的频点，然后在扫描到的频点上接收主同步信号(Primary Synchronization Signal，简记PSS)和(Secondary Synchronization Signal，简记SSS)，获得时隙和帧同步以及物理小区ID(Physical Cell ID，简记PCI)等，获取PCI以后就能知道小区参考信号位置，就可通过解调参考信号获得时隙与频率精确同步，可以接收小区广播信息，完成小区搜索过程，并可对小区参考信号进行测量。
术语“LTE FDD类型的小区信息”用于表示网络类型为LTE FDD的LTE小区的相关信息，可以包括LTE FDD频点和/或LTE FDD小区标识，还可以包括其他信息，此处不做限定。其中，LTE FDD频点表示对应的LTE小区的网络类型为LTE FDD的频点，所述LTE FDD小区表示网络类型为LTE FDD的小区。
术语“LTE TDD类型的小区信息”用于表示网络类型为LTE TDD的LTE小区的相关信息，可以包括LTE TDD频点和/或LTE TDD小区标识，还可以包括其他信息，此处不做限定。其中，LTE TDD频点表示对应的LTE小区的网络类型为LTE TDD的频点，所述LTE TDD小区表示网络类型为LTE TDD的小区。
现有技术中，存在LTE时分双工(Time-Division Duplex，TDD)与LTE 频分双工(Frequency-Division Duplex，FDD)两种类型的LTE网络，在LTE TDD与LTE FDD网络边缘或重叠覆盖区域，2G/3G CS网络下发的无线连接释放消息中的重定向信息可能同时包含LTE TDD与LTE FDD网络的信息，UE也可能同时自主搜索到LTE TDD与LTE FDD网络的小区，而UE在2G/3G CS网络中执行CS语音或其它CS业务结束，根据重定向信息或自主返回LTE网络时，可能返回到与回落前不同类型的LTE小区，会造成数据业务长时间不能恢复甚至中断，且使得LTE网络需要经较长时间才能恢复到正常注册状态。
下面对本发明实施例中的网络选择方法进行描述，请参阅图2，本发明实施例中网络选择方法一个实施例包括：
201、用户设备从第一LTE小区回落到2G或3G网络执行CS业务，所述第一LTE小区的网络类型为第一类型；
当UE接收到eNB发送的重定向或切换到2G(或3G)CS域的消息时，该UE从第一LTE小区回落到2G或3G网络执行CS业务，该第一LTE小区的网络类型为第一类型，该第一类型为LTE FDD或LTE TDD。
202、当所述用户设备在所述2G或3G网络执行CS业务结束时，所述用户设备根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
当该UE在所述2G或3G网络执行CS业务结束时，该UE根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果。在LTE TDD与LTE FDD网络边缘或重叠覆盖区域，该LTE网络信息中既包括LTE FDD类型的小区信息，也包括LTE TDD类型的小区信息。
203、所述用户设备从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
该用户设备根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果后，从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，该第二LTE小区的网络类型为第一类型，即与回落到2G/3G网络执行CS业务前所在的LTE小区的网络类型相同。
可以理解的是，该预置条件可以根据协议规定或根据实际应用场景需求自定义，例如该预置条件可以是：LTE小区的RSRP和/或RSRQ的测量值满足 一定的条件，例如RSRP和/或RSRQ大于或等于某一阈值，例如可以设定RSRP大于或等于-125dBm，则认为该小区为满足预置条件；该预置条件还可以是：从LTE小区广播信息中可以解析出公共陆地移动网络标识(Public Land Mobility Network Identity，PLMN ID)，该PLMN ID与UE非接入层(Non-Access Stratum，NAS)选择的PLMN ID相同或属于同一等效PLMN ID列表，此处不作限定。
本发明实施例中，在LTE TDD与LTE FDD网络边缘或重叠覆盖区域，UE回落到2G/3G网络执行CS业务结束后，该UE测量LTE网络所依据的LTE网络信息中既包括LTE FDD类型的小区信息，也包括LTE TDD类型的小区信息，UE依据该LTE网络信息测量LTE小区，得到对各LTE小区的测量结果后，选择其中测量结果满足预置条件的LTE小区中网络类型为第一类型(与回落到2G/3G网络执行CS业务前所在的LTE小区的网络类型相同)的第二LTE小区接入LTE网络，避免了返回到LTE网络后，由于与回落前网络类型不同而导致的数据承载无法恢复的问题，使得数据承载能马上恢复，且不再需要多次发起Attach过程才能恢复到LTE网络正常注册状态，节省了恢复到LTE网络正常注册状态的时间。
设定上面实施例中，用户设备根据LTE网络信息测量LTE小区，为测量阶段；从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，为选择阶段。在实际应用中，其具体实现方式可以有多种：其中一种方式为：可以在测量阶段仅测量网络类型为第一类型的LTE小区，选择阶段时，由于测量到的LTE均为第一类型的LTE小区，根据测量结果，从测量结果满足预置条件的LTE小区中选择网络类型为第一类型的第二LTE小区接入LTE网络即可；另一种方式为：在测量阶段，对LTE网络信息对应的LTE小区都进行测量，选择阶段时，由于测量结果满足预置条件的LTE小区中可能既包括LTE TDD小区，也包括LTE FDD小区，需要先确定各LTE小区的网络类型，再根据测量结果以及各LTE小区的网络类型，从测量结果满足预置条件的LTE小区中选择网络类型为第一类型的第二LTE小区接入LTE网络，下面分别对这两种方式进行具体描述。
一、测量阶段，仅测量网络类型为第一类型的LTE小区。
请参阅图3，本发明实施例中网络选择方法另一个实施例包括：
301、用户设备从第一LTE小区回落到2G或3G网络执行CS业务，所述第一LTE小区的网络类型为第一类型；
当UE接收到eNB发送的重定向或切换到2G(或3G)CS域的消息时，该UE从第一LTE小区回落到2G或3G网络执行CS业务，该第一LTE小区的网络类型为第一类型，该第一类型为LTE FDD或LTE TDD。
具体地，这里eNB发送的重定向到2G(或3G)CS域的消息可以为：无线连接释放消息RRC Connection Release(无线资源控制协议连接释放消息，在本发明中也简称为；RRC：Radio Resource Control，无线资源控制协议)，其中可以包含重定向信息，若包含重定向消息，该重定向信息中可以包含2G(或3G)CS域网络信息；该重定向到2G(或3G)CS域的消息也可以为小区改变命令消息CCO(Cell Change Order)，其中可以包含重定向信息，若包含重定向消息，该重定向信息中可以包含2G CS域网络信息，还可以为其它消息，此处不做限定。这里eNB发送的切换到2G(或3G)CS域的消息可以为“离开演进的通用陆地无线接入(网络)命令”(Mobility from E-UTRA Command)，其中可以包含切换到2G(或3G)CS域网络的信息，或其它消息，此处不做限定。
302、当所述用户设备在所述2G或3G网络执行CS业务结束时，所述用户设备根据LTE网络信息，仅对第一类型的LTE小区进行测量，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTETDD类型的小区信息；
当该UE在所述2G或3G网络执行CS业务结束时，该UE根据LTE网络信息测量LTE小区，在LTE TDD与LTE FDD网络边缘或重叠覆盖区域，该LTE网络信息中既包括LTE FDD小区信息，也包括LTE TDD小区信息。
需要说明的是，用户设备从2G/3G网络返回LTE网络时，需要根据LTE网络信息测量LTE小区，而根据实际网络配置的不同，该LTE网络信息的来源可能不同：
可选的，该LTE网络信息为2G或3G网络中接入网设备提供的LTE网络信息，则用户设备根据LTE网络信息，仅对第一类型的LTE小区进行测量，为：用户设备根据2G或3G网络中接入网设备提供的LTE网络信息，仅对第一类型的LTE小区进行测量。具体的，在根据2G或3G网络中接入网设备提 供的LTE网络信息，仅对第一类型的LTE小区进行测量之前，用户设备可以接收所述2G或3G网络中接入网设备发送的无线连接释放消息，所述无线连接释放消息中携带重定向信息，所述重定向信息包括所述LTE网络信息，该LTE网络信息中包括LTE FDD小区信息和LTE TDD小区信息，所述LTE FDD小区信息包括LTE FDD频点和/或LTE FDD小区标识，所述LTE TDD小区信息包括LTE TDD频点和/或LTE TDD小区标识。
可以理解的是，在2G网络中，该无线连接释放消息可以为Channel Release 或RRC Connection Release消息，在3G网络中，该无线连接释放消息为RRC Connection Release消息。
可以理解的是，在实际应用中，该LTE网络信息除了可以由无线连接释放消息携带的重定向消息提供，也还可以由接入网设备或核心网设备下发给UE的其它消息提供，此处不作限定。
可选的，该LTE网络信息为用户设备存储的LTE网络信息或所有支持的LTE频点。例如：用户设备没有接收接入网设备提供的LTE网络信息，具体地，例如接入网设备发送的无线连接释放消息中不携带重定向消息，UE自主的对LTE小区进行测量；或，UE接收到接入网设备提供的LTE网络信息但根据UE本地策略决定不使用该LTE网络信息，例如接入网设备发送的无线连接释放消息中携带了重定向消息但UE不使用该接入网设备发送的重定向消息中的LTE网络信息，UE自主的对LTE小区进行测量。则用户设备根据LTE网络信息，仅对第一类型的LTE小区进行测量，为：用户设备根据存储的LTE网络信息或所有支持的LTE频点，仅对第一类型的LTE小区进行测量。所述存储的LTE网络信息中包括LTE FDD小区信息和LTE TDD小区信息，所述LTE FDD小区信息包括LTE FDD频点和/或LTE FDD小区标识，所述LTE TDD小区信息包括LTE TDD频点和/或LTE TDD小区标识；所述支持的频点包括LTE FDD频点和LTE TDD频点。
需要说明的是，用户设备根据LTE网络信息，仅对第一类型的LTE小区进行测量，其实现的方式有很多种，具体分为两类方式：
第一类方式：在测量阶段前期还没有进行小区搜索之前，就先区分出LTE网络信息中频点或小区标识所对应的LTE小区的网络类型，仅对对应第一类型的LTE小区的频点或小区标识进行测量：
可选的，用户设备确定LTE网络信息中属于第一类型频带的频点，仅搜索属于第一类型频带的频点，继续测量搜索到的LTE小区。
可选的，用户设备根据存储的LTE网络信息，确定LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索对应第一类型的LTE小区的频点和/或小区标识，继续测量搜索到的LTE小区，该存储的LTE网络信息中包括频点和/或小区标识对应的LTE小区的网络类型。
可选的，用户设备根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识，继续测量搜索到的LTE小区。
第二类方式：用户设备先根据LTE网络信息，搜索LTE小区，再根据搜索到的LTE小区的信息来确定各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区：
可选的，用户设备根据搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。具体的，对于FDD而言，PSS在子帧0和5的第一个时隙(slot)的最后一个码元(symbol)中发送，SSS与PSS在同一子帧同一slot发送，但SSS位于倒数第二个symbol中，比PSS提前一个symbol；而对于TDD而言，PSS在子帧1和6(即DwPTS：Downlink Pilot Time Slot，下行引导时隙)的第三个symbol中发送，而SSS在子帧0和5的最后一个symbol中发送，比PSS提前3个symbol。
可选的，用户设备根据所述搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，若相同则为LTE TDD小区，否则为LTE FDD小区，仅继续测量网络类型为第一类型的LTE小区。
可以理解的是，上述各种仅对第一类型的LTE小区进行测量的方式，可以单独使用，也可以组合使用，并且还可能有其他的仅对第一类型的LTE小区进行测量的方式，此处不作限定。
303、用户设备从测量结果满足预置条件的的第一类型的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
该用户设备根据LTE网络信息，仅对网络类型为第一类型的LTE小区进行测量后，得到对各LTE小区的测量结果后，从测量结果满足预置条件的第 一类型的LTE小区中选择第二LTE小区接入LTE网络，该第二LTE小区的网络类型为第一类型，即与回落到2G/3G网络执行CS业务前所在的LTE小区的网络类型相同。
可以理解的是，测量结果满足预置条件的第一类型的LTE小区可能有多个，从中选择第二LTE小区的方式有很多，例如，可以选择测量结果满足预置条件的第一类型的LTE小区中参考信号强度最大和/或参考信号质量最好的小区作为第二LTE小区，根据实际情况需求，或协议规定，还可以采用其他的方式或要求小区满足其它条件，例如，若测量结果满足预置条件的LTE小区中包括多个第一类型的LTE小区且其中的第一类型的LTE小区具有不同的公共陆地移动网络标识(Public Land Mobility Network Identity，PLMN ID)，UE选择与回落前的LTE小区的PLMN ID相同或与回落前的LTE小区的PLMN ID属于同一等效PLMN ID列表中的PLMN ID对应的LTE小区，或选择与回落前的LTE小区的PLMN ID相比优先级更高的PLMN ID对应的LTE小区。例如：若回落前的LTE网络的网络类型为LTE FDD，回落前的LTE网络的PLMN ID为PLMN ID1，若UE测量到多个第一类型的LTE FDD小区，则UE从中选择PLMN ID为PLMN ID1或与PLMN ID1属于同一个等效PLMN列表中的PLMN ID对应的LTE FDD小区，或选择优先级高于PLMN ID1的PLMN ID对应的LTE FDD小区，此处不作限定。
本发明实施例中，在测量阶段，用户设备仅测量网络类型为第一类型的LTE小区，不对与回落前LTE小区的网络类型不同的LTE小区进行测量，节省了系统消耗，加快了加入正确的LTE网络的速率。
二、测量阶段，对LTE小区都进行测量，选择阶段再选出网络类型为第一类型的LTE小区。
请参阅图4，本发明实施例中网络选择方法另一个实施例包括：
401、用户设备从第一LTE小区回落到2G或3G网络执行CS业务，所述第一LTE小区的网络类型为第一类型；
与步骤301类似，此处不作赘述。
402、当所述用户设备在所述2G或3G网络执行CS业务结束时，所述用户设备根据所述LTE网络信息，测量LTE FDD小区和LTE TDD小区，得到对各LTE小区的测量结果；
当该UE在所述2G或3G网络执行CS业务结束时，该UE根据LTE网络信息测量LTE FDD小区和LTE TDD小区，得到对各LTE小区的测量结果，在LTE TDD与LTE FDD网络边缘或重叠覆盖区域，该LTE网络信息中既包括LTE FDD类型的小区信息，也包括LTE TDD类型的小区信息。
需要说明的是，用户设备从2G/3G网络返回LTE网络时，需要根据LTE网络信息测量LTE小区，而根据实际网络配置的不同，该LTE网络信息的来源可能不同：
可选的，该LTE网络信息为2G或3G网络中接入网设备提供的LTE网络信息，则用户设备根据LTE网络信息，测量LTE FDD小区和LTE TDD小区，为：用户设备根据2G或3G网络中接入网设备提供的LTE网络信息，测量LTEFDD小区和LTE TDD小区。具体的，在根据2G或3G网络中接入网设备提供的LTE网络信息，测量LTE FDD小区和LTE TDD小区之前，用户设备可以接收所述2G或3G网络中接入网设备发送的无线连接释放消息，所述无线连接释放消息中携带重定向信息，所述重定向信息包括所述LTE网络信息，该LTE网络信息中包括LTE FDD小区信息和LTE TDD小区信息，所述LTEFDD小区信息包括LTE FDD频点和/或LTE FDD小区标识，所述LTE TDD小区信息包括LTE TDD频点和/或LTE TDD小区标识。
可以理解的是，在2G网络中，该无线连接释放消息可以为Channel Release或RRC Connection Release消息，在3G网络中，该无线连接释放消息为RRCConnection Release消息。
可以理解的是，在实际应用中，该LTE网络信息除了可以由无线连接释放消息携带的重定向消息提供，也还可以由接入网设备或核心网设备下发给UE的其它消息提供，此处不作限定。
可选的，该LTE网络信息为用户设备存储的LTE网络信息或所有支持的LTE频点，例如：用户设备没有接收接入网设备提供的LTE网络信息，具体地，例如接入网设备发送的无线连接释放消息中不携带重定向消息，UE自主的对LTE小区进行测量；或，UE接收到接入网设备提供的LTE网络信息但根据UE本地策略决定不使用该LTE网络信息，例如接入网设备发送的无线连接释放消息中携带了重定向消息但UE不使用该接入网设备发送的重定向消息中的LTE网络信息，UE自主的对LTE小区进行测量，则用户设备根据LTE网 络信息，测量LTE FDD小区和LTE TDD小区，为：用户设备根据存储的LTE网络信息或所有支持的LTE频点，测量LTE FDD小区和LTE TDD小区。所述存储的LTE网络信息中包括LTE FDD小区信息和LTE TDD小区信息，所述存储的LTE网络信息中包括LTE FDD小区信息和LTE TDD小区信息，所述LTE FDD小区信息包括LTE FDD频点和/或LTE FDD小区标识，所述LTETDD小区信息包括LTE TDD频点和/或LTE TDD小区标识；所述支持的频点包括LTE FDD频点和LTE TDD频点。
403、所述用户设备确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
用户设备测量LTE FDD小区和LTE TDD小区，得到对各LTE小区的测量结果后，确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型。
可以理解的是，确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型的方式有很多种：
可选的，用户设备根据所述各LTE小区的频点属于LTE FDD的频带或LTETDD的频带，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
可选的，用户设备根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；具体的，对于FDD而言，PSS在子帧0和5的第一个slot的最后一个symbol中发送，SSS与PSS在同一子帧同一slot发送，但SSS位于倒数第二个symbol中，比PSS提前一个symbol；而对于TDD而言，PSS在子帧1和6(即DwPTS)的第三个symbol中发送，而SSS在子帧0和5的最后一个symbol中发送，比PSS提前3个symbol。
可选的，所述用户设备根据存储的LTE网络信息，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型；
可选的，所述用户设备根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
可选的，所述用户设备根据各LTE小区的上行频点与下行频点是否相同， 确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，若相同则为LTE TDD小区，否则为LTE FDD小区。
可以理解的是，上述各种确定测量到的LTE小区中各LTE小区的网络类型的方式，可以单独使用，也可以组合使用，并且还可能有其他的确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型的方式，此处不作限定。
404、所述用户设备从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
用户设备确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型后，从测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择第二LTE小区接入LTE网络，该第二LTE小区的网络类型为第一类型，即与回落到2G/3G网络执行CS业务前所在的LTE小区的网络类型相同。
可以理解的是，用户设备确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型后，得到的测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区可能有多个，从中选择第二LTE小区的方式有很多，例如，可以选择测测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中参考信号强度最大和/或参考信号质量最好的小区作为第二LTE小区，根据实际情况需求，或协议规定，还可以采用其他的方式或要求小区满足其它条件，例如，若UE测量到的LTE小区中网络类型为第一类型的LTE小区有多个，且其中的第一类型的LTE小区具有不同的公共陆地移动网络标识(Public Land Mobility Network Identity，PLMN ID)，UE选择与回落前的LTE小区的PLMN ID相同或与回落前的LTE小区的PLMN ID属于同一等效PLMN ID列表中的PLMN ID对应的LTE小区，或选择与回落前的LTE小区的PLMN ID相比优先级更高的PLMN ID对应的LTE小区。例如：若回落前的LTE网络的网络类型为LTE FDD，回落前的LTE网络的PLMN ID为PLMN ID1，若UE测量到多个第一类型的LTE FDD小区，则UE从中选择PLMN ID为PLMN ID1或与PLMN ID1属于同一个等效PLMN列表中的PLMN ID对应的LTE FDD小区，或选择优先级高于PLMN ID1的PLMN ID对应的LTE FDD小区，此处不作限定。
本发明实施例中，UE在测量阶段不需要对现有技术做出改变，仅需要在选择阶段，先确定测量阶段测量结果满足预置条件的LTE小区的网络类型，再从测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择第二LTE网络，达到选择与回落前所在第一LTE小区的网络类型相同的第二LTE小区返回LTE网络的效果，节省了恢复到LTE网络正常注册状态的时间，提高了该UE恢复到LTE网络正常注册状态的速率。
上面各实施例中，用户设备从第一LTE小区回落到2G或3G网络执行CS业务，具体过程可以为：用户设备从LTE小区回落到2G或3G网络，将分组交换数据承载挂起或切换到所述2G或3G网络，在所述2G或3G网络执行CS业务；相应的，在用户设备选择第二LTE小区接入LTE网络后，该用户设备可以检测该分组交换数据承载是否成功恢复或处于激活状态；若该分组交换数据承载恢复或处于激活状态，则该用户设备在所述第二LTE小区中发起跟踪区域更新TAU过程；否则，该用户设备在所述第二LTE小区中发起LTE附着过程。
若UE在该第二LTE小区执行TAU或Attach过程失败，UE可以重新选择网络类型与该第一类型不同的LTE小区，发起TAU或LTE Attach过程，注册到LTE FDD网络。在图3对应实施例中，UE没有测量网络类型与该第一类型不同的LTE小区，此时UE需要先测量网络类型与该第一类型不同的LTE小区。
具体的，TAU过程可以是联合的跟踪区域和位置区域更新(Combined TA/LA Updating)过程，或联合的跟踪区域和位置区域更新，伴随IMSI附着(Combined TA/LA Updating with IMSI Attach)过程；LTE附着过程可以是联合的演进分组系统和IMSI附着(Combined EPS/IMSI Attach)过程。MME在收到UE发送的TAU或Attach请求消息后可以向MSC Server发起位置区域更新(Location Area Updating，CS LAU)或IMSI附着(IMSI Attach)过程，即CS注册过程。
下面对本发明实施例中的用户设备进行描述：
请参阅图5，本发明实施例中用户设备一个实施例包括：
回落模块501，用于从LTE小区回落到2G或3G网络执行电路交换CS业务，所述第一LTE小区的网络类型为第一类型，所述第一类型为LTE FDD 或LTE TDD；
测量模块502，用于当所述用户设备在所述2G或3G网络执行CS业务结束时，根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
选择模块503，用于从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
本发明实施例中，在LTE TDD与LTE FDD网络边缘或重叠覆盖区域，回落模块501回落到2G/3G网络执行CS业务结束后，测量模块502测量LTE网络所依据的LTE网络信息中既包括LTE FDD类型的小区信息，也包括LTE TDD类型的小区信息，测量模块502依据该LTE网络信息测量LTE小区，得到对各LTE小区的测量结果后，选择模块503选择其中测量结果满足预置条件的LTE小区中网络类型为第一类型(与回落到2G/3G网络执行CS业务前所在的LTE小区的网络类型相同)的第二LTE小区接入LTE网络，避免了返回到LTE网络后，由于与回落前网络类型不同而导致的数据承载无法恢复的问题，使得数据承载能马上恢复，且不再需要多次发起Attach过程才能恢复到LTE网络正常注册状态，节省了恢复到LTE网络正常注册状态的时间。
上面实施例中，该LTE网络信息的来源有很多种，可以为2G或3G网络中接入网设备提供的LTE网络信息，也可以为所述用户设备存储的LTE网络信息，或还可以为所述用户设备所有支持的LTE频点，此处不作限定。
上面实施例中，选择模块503选择第二LTE小区接入LTE网络，因此需要有确定LTE小区的网络类型的过程，在实际应用中，该过程可以由测量模块502来完成，也可以由选择模块503来完成：
一、由测量模块502来完成。
作为本发明实施例中用户设备另一个实施例，该测量模块502具体用于，当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
所述选择模块503具体用于，从测量结果满足预置条件的第一类型的LTE 小区中选择所述第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
本实施例中，确定LTE小区的网络类型的过程由测量模块502来完成。
在实际应用中，测量模块502根据所述LTE网络信息，仅对第一类型的LTE小区进行测量的实现方式分为两类，一类是在搜索小区前即判断LTE频点或小区标识对应的LTE小区的网络类型，仅搜索对应第一类型的LTE小区的频点和/或小区标识，另一类是，先搜索LTE小区，再确定搜索到的LTE小区的LTE网络类型；下面对本发明实施例中的用户设备进行具体描述：
请参阅图6，作为本发明实施例中用户设备另一个实施例，图5所示实施例中测量模块502具体包括：
第一搜索单元601，用于当所述用户设备在所述2G或3G网络执行CS业务结束时，确定所述LTE网络信息中属于第一类型频带的频点，仅搜索所述属于第一类型频带的频点；和/或，根据存储的LTE网络信息，确定所述LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；
第一测量单元602，用于继续测量所述第一搜索单元601搜索到的LTE小区，得到对各LTE小区的测量结果。
本实施例中，第一搜索单元601在搜索小区之前即确定频点或小区标识对应的LTE小区的网络类型，仅搜索确定对应第一类型的LTE小区的频点和/或小区标识。
请参阅图7，作为本发明实施例中用户设备另一个实施例，图5所示实施例中测量模块502具体包括：
第二搜索单元701，用于根据所述LTE网络信息，搜索LTE小区；
第二测量单元702，用于根据所述第二搜索单元701搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，和/或，根据所述第二搜索单元搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。
本实施例中，第二搜索单元701直接根据LTE网络信息搜索LTE小区， 第二测量单元702先确定搜索到的LTE小区的网络类型，再测量搜索到的LTE小区。
二、由选择模块503来完成。
请参阅图8，作为本发明实施例中用户设备另一个实施例，图5所示实施例中该测量模块502具体用于，当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，测量LTE FDD小区和LTE TDD小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
所述选择模块503具体包括：
确定单元801，用于确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
选择单元802，用于从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择所述第二LTE小区接入LTE网络。
可选的，在实际应用中，该确定单元801具体用于，根据各LTE小区的频点属于LTE FDD的频带或LTE TDD的频带，和/或，根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，和/或，根据存储的LTE网络信息，和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，和/或，根据各LTE小区的上行频点与下行频点是否相同，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型。
本实施例中，确定LTE小区的网络类型的过程由测量模块502中的确定单元801来完成。
请参阅图9，本发明实施例中用户设备900另一个实施例包括：
输入装置901、输出装置902、处理器903和存储器904(其中用户设备900中的处理器903的数量可以一个或多个，图9中以一个处理器903为例)。在本发明的一些实施例中，输入装置901、输出装置902、处理器903和存储器904可通过总线或其它方式连接，其中，图9中以通过总线连接为例。
其中，通过调用存储器904存储的操作指令，处理器903，用于执行如下步骤：
从LTE小区回落到2G或3G网络执行电路交换CS业务，所述第一LTE 小区的网络类型为第一类型，所述第一类型为LTE FDD或LTE TDD；
当所述用户设备在所述2G或3G网络执行CS业务结束时，根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型；
本发明的一些实施例中，该处理器903具体用于执行如下步骤：
当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
从测量结果满足预置条件的第一类型的LTE小区中选择所述第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型；
本发明的一些实施例中，该处理器903具体用于执行如下步骤：
当所述用户设备在所述2G或3G网络执行CS业务结束时，确定所述LTE网络信息中属于第一类型频带的频点，仅搜索所述属于第一类型频带的频点；和/或，根据存储的LTE网络信息，确定所述LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；
继续测量搜索到的LTE小区，得到对各LTE小区的测量结果；
本发明的一些实施例中，该处理器903具体用于执行如下步骤：
根据所述LTE网络信息，搜索LTE小区；
根据搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，和/或，根据搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。
本发明的一些实施例中，该处理器903具体用于执行如下步骤：
当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，测量LTE FDD小区和LTE TDD小区，得到对各LTE小区的测量 结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择所述第二LTE小区接入LTE网络；
本发明的一些实施例中，该处理器903具体用于执行如下步骤：
根据各LTE小区的频点属于LTE FDD的频带或LTE TDD的频带，和/或，根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，和/或，根据存储的LTE网络信息，和/或，根据2G或3G网络下发的LTE FDD和/或LTETDD指示信息，和/或，根据各LTE小区的上行频点与下行频点是否相同，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (19)

  1. 一种网络选择方法，其特征在于，包括：
    用户设备从第一长期演进LTE小区回落到第二代移动通讯系统2G或第三代移动通讯系统3G网络执行电路交换CS业务，所述第一LTE小区的网络类型为第一类型，所述第一类型为LTE 频分复用FDD或LTE 时分复用TDD；
    当所述用户设备在所述2G或3G网络执行CS业务结束时，所述用户设备根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
    所述用户设备从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
  2. 根据权利要求1所述的方法，其特征在于，所述LTE网络信息为2G或3G网络中接入网设备提供的LTE网络信息，或为所述用户设备存储的LTE网络信息，或为所述用户设备所有支持的LTE频点。
  3. 根据权利要求1或2所述的方法，其特征在于，所述用户设备根据LTE网络信息测量LTE小区，包括：
    所述用户设备根据所述LTE网络信息，仅对第一类型的LTE小区进行测量；
    所述用户设备从测量结果满足预置条件的LTE小区中选择所述第二LTE小区接入LTE网络，包括：
    所述用户设备从测量结果满足预置条件的第一类型的LTE小区中选择所述第二LTE小区接入LTE网络。
  4. 根据权利要求3所述的方法，其特征在于，所述用户设备根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，包括：
    所述用户设备确定所述LTE网络信息中属于第一类型频带的频点，仅搜索所述属于第一类型频带的频点，继续测量搜索到的LTE小区；
    和/或，所述用户设备根据存储的LTE网络信息，确定所述LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识，继续测量搜索到的LTE小区，所述存储的LTE网络信息中包括频点和/或小区标识对应的LTE小区的网络类型；
    和/或，所述用户设备根据2G或3G网络下发的LTE FDD和/或LTE TDD 指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识，继续测量搜索到的LTE小区。
  5. 根据权利要求3所述的方法，其特征在于，所述用户设备根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，包括：
    所述用户设备根据所述LTE网络信息，搜索LTE小区；
    所述用户设备根据搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区；
    和/或，所述用户设备根据所述搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。
  6. 根据权利要求1或2所述的方法，其特征在于，所述用户设备根据LTE网络信息测量LTE小区，包括：
    所述用户设备根据所述LTE网络信息，测量LTE FDD小区和LTE TDD小区；
    所述用户设备从测量结果满足预置条件的LTE小区中选择所述第二LTE小区接入LTE网络，包括：
    所述用户设备确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
    所述用户设备从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择所述第二LTE小区接入LTE网络。
  7. 根据权利要求6所述的方法，其特征在于，所述用户设备确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型，包括：
    所述用户设备根据各LTE小区的频点属于LTE FDD的频带或LTE TDD的频带，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
    和/或，所述用户设备根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
    和/或，所述用户设备根据存储的LTE网络信息，确定所述测量结果满足 预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型；
    和/或，所述用户设备根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
    和/或，所述用户设备根据各LTE小区的上行频点与下行频点是否相同，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型。
  8. 一种用户设备，其特征在于，包括：
    回落模块，用于从LTE小区回落到2G或3G网络执行电路交换CS业务，所述第一LTE小区的网络类型为第一类型，所述第一类型为LTE FDD或LTETDD；
    测量模块，用于当所述用户设备在所述2G或3G网络执行CS业务结束时，根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
    选择模块，用于从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
  9. 根据权利要求8所述的用户设备，其特征在于，所述测量模块具体用于，当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
    所述选择模块具体用于，从测量结果满足预置条件的第一类型的LTE小区中选择所述第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
  10. 根据权利要求9所述的用户设备，其特征在于，所述测量模块具体包括：
    第一搜索单元，用于当所述用户设备在所述2G或3G网络执行CS业务结束时，确定所述LTE网络信息中属于第一类型频带的频点，仅搜索所述属于第一类型频带的频点；和/或，根据存储的LTE网络信息，确定所述LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应 第一类型的LTE小区的频点和/或小区标识；和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；
    第一测量单元，用于继续测量所述第一搜索单元搜索到的LTE小区，得到对各LTE小区的测量结果。
  11. 根据权利要求9所述的用户设备，其特征在于，所述测量模块具体包括：
    第二搜索单元，用于根据所述LTE网络信息，搜索LTE小区；
    第二测量单元，用于根据所述第二搜索单元搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，和/或，根据所述第二搜索单元搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。
  12. 根据权利要求8所述的用户设备，其特征在于，所述测量模块具体用于，当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，测量LTE FDD小区和LTE TDD小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
    所述选择模块具体包括：
    确定单元，用于确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
    选择单元，用于从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择所述第二LTE小区接入LTE网络。
  13. 根据权利要求12所述的用户设备，其特征在于，所述确定单元具体用于，根据各LTE小区的频点属于LTE FDD的频带或LTE TDD的频带，和/或，根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，和/或，根据存储的LTE网络信息，和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，和/或，根据各LTE小区的上行频点与下行频点是否相同，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型。
  14. 一种用户设备，其特征在于，包括：
    输入装置、输出装置、处理器和存储器；
    通过调用所述存储器存储的操作指令，所述处理器，用于执行如下步骤：
    从LTE小区回落到2G或3G网络执行电路交换CS业务，所述第一LTE小区的网络类型为第一类型，所述第一类型为LTE FDD或LTE TDD；
    当所述用户设备在所述2G或3G网络执行CS业务结束时，根据LTE网络信息测量LTE小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
    从测量结果满足预置条件的LTE小区中选择第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
  15. 根据权利要求14所述的用户设备，其特征在于，所述处理器具体用于执行如下步骤：
    当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，仅对第一类型的LTE小区进行测量，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
    从测量结果满足预置条件的第一类型的LTE小区中选择所述第二LTE小区接入LTE网络，所述第二LTE小区的网络类型为所述第一类型。
  16. 根据权利要求15所述的用户设备，其特征在于，所述处理器具体用于执行如下步骤：
    当所述用户设备在所述2G或3G网络执行CS业务结束时，确定所述LTE网络信息中属于第一类型频带的频点，仅搜索所述属于第一类型频带的频点；和/或，根据存储的LTE网络信息 ，确定所述LTE网络信息中对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；和/或，根据2G或3G网络下发的LTE FDD和/或LTE TDD指示信息，确定对应第一类型的LTE小区的频点和/或小区标识，仅搜索所述对应第一类型的LTE小区的频点和/或小区标识；
    继续测量搜索到的LTE小区，得到对各LTE小区的测量结果。
  17. 根据权利要求15所述的用户设备，其特征在于，所述处理器具体用于执行如下步骤：
    根据所述LTE网络信息，搜索LTE小区；
    根据搜索到的各LTE小区的帧中主同步信号和/或辅同步信号的位置，和/或，根据搜索到的各LTE小区的上行频点与下行频点是否相同，确定搜索到的各LTE小区的网络类型，仅继续测量网络类型为第一类型的LTE小区。
  18. 根据权利要求14所述的用户设备，其特征在于，所述处理器具体用于执行如下步骤：
    当所述用户设备在所述2G或3G网络执行CS业务结束时，根据所述LTE网络信息，测量LTE FDD小区和LTE TDD小区，得到对各LTE小区的测量结果，所述LTE网络信息中包括LTE FDD类型的小区信息和LTE TDD类型的小区信息；
    确定测量结果满足预置条件的LTE小区中各LTE小区的网络类型；
    从所述测量结果满足预置条件的LTE小区中网络类型为第一类型的LTE小区中，选择所述第二LTE小区接入LTE网络。
  19. 根据权利要求18所述的用户设备，其特征在于，所述处理器具体用于执行如下步骤：
    根据各LTE小区的频点属于LTE FDD的频带或LTE TDD的频带，和/或，根据各LTE小区的帧中主同步信号PSS和/或辅同步信号的位置，和/或，根据存储的LTE网络信息，和/或，根据2G或3G网络下发的LTE FDD和/或LTETDD指示信息，和/或，根据各LTE小区的上行频点与下行频点是否相同，确定所述测量结果满足预置条件的LTE小区中各LTE小区的网络类型，所述存储的LTE网络信息中包括LTE小区的网络类型。
PCT/CN2014/089700 2014-10-28 2014-10-28 一种网络选择方法和用户设备 WO2016065535A1 (zh)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP14904651.8A EP3091785B1 (en) 2014-10-28 2014-10-28 Network selection method and user equipment
JP2016554582A JP6349409B2 (ja) 2014-10-28 2014-10-28 ネットワーク選択方法及びユーザ機器
AU2014409906A AU2014409906B2 (en) 2014-10-28 2014-10-28 Network selection method and user equipment
BR112016021320-3A BR112016021320B1 (pt) 2014-10-28 2014-10-28 Método de seleção de rede e equipamento de usuário
CN201480027865.5A CN105745964B (zh) 2014-10-28 2014-10-28 一种网络选择方法和用户设备
PCT/CN2014/089700 WO2016065535A1 (zh) 2014-10-28 2014-10-28 一种网络选择方法和用户设备
US15/250,183 US20160381613A1 (en) 2014-10-28 2016-08-29 Network selection method and user equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/089700 WO2016065535A1 (zh) 2014-10-28 2014-10-28 一种网络选择方法和用户设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/250,183 Continuation US20160381613A1 (en) 2014-10-28 2016-08-29 Network selection method and user equipment

Publications (1)

Publication Number Publication Date
WO2016065535A1 true WO2016065535A1 (zh) 2016-05-06

Family

ID=55856355

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/089700 WO2016065535A1 (zh) 2014-10-28 2014-10-28 一种网络选择方法和用户设备

Country Status (7)

Country Link
US (1) US20160381613A1 (zh)
EP (1) EP3091785B1 (zh)
JP (1) JP6349409B2 (zh)
CN (1) CN105745964B (zh)
AU (1) AU2014409906B2 (zh)
BR (1) BR112016021320B1 (zh)
WO (1) WO2016065535A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110267319A (zh) * 2019-07-17 2019-09-20 中国联合网络通信集团有限公司 基于位置返回lte网络的方法、移动终端及系统

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10123355B2 (en) * 2015-10-28 2018-11-06 Verizon Patent And Licensing Inc. Device-initiated cell selection subsequent to procedure failure
US10772033B2 (en) * 2016-01-27 2020-09-08 Mediatek Singapore Pte. Ltd. Avoiding reselection of a fake cell in a wireless communication network
US10440645B2 (en) * 2016-10-11 2019-10-08 Verizon Patent And Licensing Inc. Extending signal coverage and charge duration of a user equipment
US11375390B2 (en) 2017-07-21 2022-06-28 Htc Corporation Device and method of handling a measurement configuration and a reporting
US10972358B2 (en) 2017-08-30 2021-04-06 Citrix Systems, Inc. Inferring congestion and signal quality
CN110557796B (zh) * 2019-09-17 2021-09-10 中国联合网络通信集团有限公司 返回长期演进网络的方法和装置
KR20210049585A (ko) * 2019-10-25 2021-05-06 삼성전자주식회사 통신 서비스를 제공하는 전자 장치 및 그의 동작 방법
CN112752316B (zh) * 2020-12-28 2023-12-19 维沃移动通信有限公司 电子设备联网控制方法、装置、电子设备和存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013020000A1 (en) * 2011-08-02 2013-02-07 Qualcomm Incorporated Method for fast return to source rat (radio access technology) after redirection to target
US20140087723A1 (en) * 2012-09-26 2014-03-27 Apple Inc. Facilitating reselection by a wireless communication device to a first network from a second network after termination of a circuit switched fallback voice call
CN103906158A (zh) * 2012-12-28 2014-07-02 展讯通信（上海）有限公司 一种从2g/3g网络返回lte网络的方法
WO2014165475A1 (en) * 2013-04-02 2014-10-09 Apple Inc. Facilitating return to a first wireless network from a second wireless network after performance of a circuit switched fallback procedure

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101341303B1 (ko) * 2012-04-26 2013-12-12 주식회사 팬택 무선 접속 기술 간의 전환을 위한 단말의 통신 방법 및 그 단말
US9049634B2 (en) * 2012-09-18 2015-06-02 Acer Incorporated Apparatuses and methods for camping back to LTE-based network after finishing CSFB call with non-LTE network
CN103906090B (zh) * 2012-12-28 2018-07-27 展讯通信（上海）有限公司 一种在非lte网络测量lte邻区的方法、装置
US9307543B2 (en) * 2012-12-28 2016-04-05 Spreadtrum Communications (Shanghai) Co., Ltd. Packet-switched network return
US9055488B2 (en) * 2013-03-01 2015-06-09 Apple Inc. Assisting return to a first network from a second network after performance of a circuit switched fallback procedure
US9877271B2 (en) * 2013-09-30 2018-01-23 Apple Inc. Method and apparatus for LTE cell search using multiple receivers of a mobile device
CN103517363B (zh) * 2013-10-15 2017-02-22 中国联合网络通信集团有限公司 异系统快速返回方法和终端
US9832686B2 (en) * 2014-07-07 2017-11-28 Apple Inc. Procedures for 3GPP circuit switched fallback
US20160044545A1 (en) * 2014-08-05 2016-02-11 Qualcomm Incorporated Fast return after circuit switched fall back (csfb) radio resource control connection failure
US20160057671A1 (en) * 2014-08-22 2016-02-25 Qualcomm Incorporated Fast return after circuit switched fall back (csfb) call release

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013020000A1 (en) * 2011-08-02 2013-02-07 Qualcomm Incorporated Method for fast return to source rat (radio access technology) after redirection to target
US20140087723A1 (en) * 2012-09-26 2014-03-27 Apple Inc. Facilitating reselection by a wireless communication device to a first network from a second network after termination of a circuit switched fallback voice call
CN103906158A (zh) * 2012-12-28 2014-07-02 展讯通信（上海）有限公司 一种从2g/3g网络返回lte网络的方法
WO2014165475A1 (en) * 2013-04-02 2014-10-09 Apple Inc. Facilitating return to a first wireless network from a second wireless network after performance of a circuit switched fallback procedure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3091785A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110267319A (zh) * 2019-07-17 2019-09-20 中国联合网络通信集团有限公司 基于位置返回lte网络的方法、移动终端及系统
CN110267319B (zh) * 2019-07-17 2021-07-20 中国联合网络通信集团有限公司 基于位置返回lte网络的方法、移动终端及系统

Also Published As

Publication number Publication date
JP6349409B2 (ja) 2018-06-27
BR112016021320A2 (pt) 2018-06-26
JP2017506861A (ja) 2017-03-09
US20160381613A1 (en) 2016-12-29
CN105745964A (zh) 2016-07-06
BR112016021320B1 (pt) 2022-12-27
AU2014409906A1 (en) 2016-08-18
EP3091785B1 (en) 2018-03-21
EP3091785A1 (en) 2016-11-09
AU2014409906B2 (en) 2017-10-19
EP3091785A4 (en) 2017-03-08
CN105745964B (zh) 2019-06-07

Similar Documents

Publication Publication Date Title
JP7299271B2 (ja) ネットワークスライスのための無線通信方法およびシステム
WO2016065535A1 (zh) 一种网络选择方法和用户设备
KR102441861B1 (ko) 조기 측정들에서의 빔 정보
EP3573376B1 (en) Device and method of handling mobility between long-term evolution network and fifth generation network
RU2756897C1 (ru) Предоставление отчетов, характерных для sftd и anr
US10123239B2 (en) Light-weight RRC connection setup in multi-RAT network
EP2710835B1 (en) Pre-configured redirection information
US20110176485A1 (en) Circuit switched fallback
CN105338584B (zh) 一种返回lte网络的方法及装置
US9380504B2 (en) Method, user equipment, and base station for changing access cell
US20180132157A1 (en) Network access method, ue and computer storage medium
CN113424576A (zh) 在连接恢复完成之前触发测量
US20160088540A1 (en) Method for Handover Without Default Bearer and Device
JP7263254B2 (ja) 情報処理方法および装置
WO2013012371A1 (en) Circuit-switched fallback for a mobile radio
CN113196863A (zh) 用于在恢复时执行移交的方法和节点
CN106063327B (zh) 一种处理语音业务的方法、终端
WO2014067166A1 (zh) 一种回归长期演进lte网络的方法、设备及系统
WO2016054822A1 (zh) Csfb呼叫建立方法及装置
TW201208449A (en) RFSP selective camping
CN109089289A (zh) 切换到电路交换域的方法和装置
WO2017201694A1 (zh) 一种csfb实现方法及接入网设备
WO2015184865A1 (zh) 一种识别电路域回落业务的方法和系统
US20220417728A1 (en) Method and apparatus for radio access network based notification area update
US20190159075A1 (en) Method for accessing inter-rat cell and related device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14904651

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2014904651

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2014904651

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2014409906

Country of ref document: AU

Date of ref document: 20141028

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2016554582

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: IDP00201606309

Country of ref document: ID

NENP Non-entry into the national phase

Ref country code: DE

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112016021320

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112016021320

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20160915