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WO2012130003A1 - 一种ps连接态重选的方法及终端 - Google Patents

一种ps连接态重选的方法及终端 Download PDF

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Publication number
WO2012130003A1
WO2012130003A1 PCT/CN2012/071496 CN2012071496W WO2012130003A1 WO 2012130003 A1 WO2012130003 A1 WO 2012130003A1 CN 2012071496 W CN2012071496 W CN 2012071496W WO 2012130003 A1 WO2012130003 A1 WO 2012130003A1
Authority
WO
WIPO (PCT)
Prior art keywords
threshold
cell
lte
different system
terminal
Prior art date
Application number
PCT/CN2012/071496
Other languages
English (en)
French (fr)
Inventor
夏庆凡
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 EP12764363.3A priority Critical patent/EP2637451A4/en
Publication of WO2012130003A1 publication Critical patent/WO2012130003A1/zh
Priority to US13/970,245 priority patent/US20130336290A1/en

Links

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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength

Definitions

  • the present invention relates to the field of communications, and in particular, to a PS connection state reselection method and terminal. Background technique
  • the currently used voice service and short message service are mainly provided by the CS (Circuit Switched) domain, and the data service is mainly provided by the PS (Packet Switched) domain.
  • LTE Long Term Evolution
  • the voice solution for LTE is located in the final adoption of the LTE+IMS (IP Multimedia Subsystem) solution to support voice services.
  • IMS IP Multimedia Subsystem
  • CSFB Circuit Domain FallBack, circuit domain fallback
  • the technical implementation of the CSFB is to perform a traditional CS domain voice call by causing a terminal residing in the LTE cell to fall back to the 2G, 3G CS domain by one of the methods including redirection, PS handover, and cell change command. Therefore, the terminal must be a dual-mode or multi-mode terminal, and GSM (Global System For Mobile Communications), UTRAN (UMTS Terrestrial Radio Access Network), and LTE network will coexist for a long time.
  • GSM Global System For Mobile Communications
  • UTRAN UMTS Terrestrial Radio Access Network
  • the LTE/GSM dual-mode terminal is taken as an example.
  • the PS is established in the LTE network and in the connected state
  • the LTE network sends a different system B1 or B2 measurement configuration.
  • the measurement operation is performed according to the measurement configuration of the network, and when the measurement configuration condition is met, the measurement report is uploaded, and the network command terminal switches to the different system network.
  • the LTE module is set to work in the LTE only mode.
  • the LTE network does not send different system B1 or B2 measurement configurations to the LTE only terminal.
  • the system switching command will cause the terminal to fail to switch or redirect to the different system when the LTE network quality cannot meet the PS service requirements, which affects the user's usage.
  • a method for packet switched PS connection state reselection comprising:
  • the third system message block SIB3 delivered by the network side is read, and the sixth system message block SIB6 and/or the seventh system message block SIB7 are read;
  • the SIB7 includes a second threshold and a global mobile communication system GSM frequency point;
  • the method further includes:
  • the PS service is reselected to the corresponding different system cell after waiting for the ongoing circuit switched CS service of the terminal.
  • the SIB6 includes a third threshold and a terrestrial radio access network UTRAN frequency point;
  • the different system reselection threshold includes a second threshold and/or a third threshold
  • the different system frequency points include a GSM frequency point and/or a UTRAN frequency point.
  • the method further includes:
  • the terminal determines whether the inter-system cell where the CS service currently camped by the terminal is a GSM cell or a UTRAN cell, so that the terminal determines a target inter-system cell to which the PS service is handed over.
  • the signal strength measurement is performed on the LTE frequency point and the different system frequency point respectively, if the signal strength measured at the LTE frequency point is lower than the first threshold and is in the The signal strength measured on the different system frequency points is higher than the different system reselection threshold, and the PS service is reselected to the corresponding different system cell, which specifically includes:
  • the inter-system cell in which the CS service currently camped by the terminal is a GSM cell, performing signal strength measurement on the LTE frequency point and the GSM frequency point respectively, if the measurement is performed on the LTE frequency point The signal obtained is strong The signal strength lower than the first threshold and measured at the GSM frequency point is higher than the second threshold, and the PS service is reselected to the GSM cell;
  • the inter-system cell in which the CS service currently camped by the terminal is a UTRAN cell, performing signal strength measurement on the LTE frequency point and the UTRAN frequency point respectively, if the measurement is performed on the LTE frequency point The obtained signal strength is lower than the first threshold and the measured signal strength at the UTRAN frequency is higher than the third threshold, and the PS traffic is reselected to the UTRAN cell.
  • the acquiring the first threshold according to the SIB3 includes:
  • the method further includes:
  • a PS connection state reselection terminal wherein the apparatus includes: an LTE module and a different system module; wherein, the LTE module includes:
  • the system message reading unit is configured to read the SIB3 sent by the network side and read the SIB6 and/or the SIB7 when the cell system message changes or the intra-system cell handover occurs.
  • a parameter obtaining unit configured to acquire a first threshold, an LTE frequency point according to the SIB3, and obtain a different system reselection threshold and a different system frequency point according to the SIB6 and/or the SIB7;
  • a first sending unit configured to send the different system reselection threshold and the different system frequency to the different system module; and the first measuring unit is configured to perform signal strength measurement on the LTE frequency point;
  • a first determining unit configured to determine whether a signal strength measured at the LTE frequency point is lower than the first threshold
  • the different system module includes:
  • a second measuring unit configured to receive the different system reselection threshold and the different system frequency point sent by the first sending unit, and perform signal strength measurement on the different system frequency points respectively;
  • a second determining unit configured to determine whether a signal strength measured at the different system frequency point is higher than the different system reselection threshold; a reselecting unit, configured to: when a signal strength measured at the LTE frequency point is lower than the first threshold, and a signal strength measured at the different system frequency point is higher than the different system reselection gate The time limit is received, and the reselection command sent by the corresponding different system cell is received, and the PS service is reselected into the corresponding different system cell.
  • the SIB7 includes a second threshold and a GSM frequency point;
  • the different system module further includes:
  • a third determining unit configured to determine, before the reselecting unit reselects the PS service to the corresponding different system cell, whether the terminal and the corresponding different system cell support the DTM, and if yes, notify the The reselecting unit reselects the PS service to the corresponding different system cell. If not, after waiting for the ongoing circuit switched CS service of the terminal to complete, notifying the reselecting unit to reselect the PS service to the In the corresponding different system cell.
  • the SIB6 includes a third threshold and a UTRAN frequency point
  • the different system reselection threshold includes a second threshold and/or a third threshold
  • the different system frequency points include a GSM frequency point and/or a UTRAN frequency point.
  • the different system module further includes:
  • a fourth determining unit configured to: before the system message reading unit reads the SIB3 sent by the network side, and before reading the SIB6 and/or the SIB7, acquiring a different system cell where the CS service currently camped by the terminal resides Whether it is a GSM cell or a UTRAN cell, so that the terminal determines a target hetero-system cell to which the PS service is handed over.
  • the second measurement unit is specifically configured to perform signal strength measurement on the GSM frequency point when the inter-system cell in which the CS service currently camped by the terminal is a GSM cell;
  • the second determining unit is specifically configured to determine that a signal strength measured at the GSM frequency point is higher than the second threshold
  • the reselecting unit is specifically configured to: when a signal strength measured at the LTE frequency point is lower than the first threshold, and a signal strength measured at the GSM frequency point is higher than the second door Receiving a reselection command sent by the GSM cell, and reselecting the PS service into the GSM cell;
  • the second measurement unit is specifically configured to perform signal strength measurement on the UTRAN frequency point;
  • the second determining unit is specifically configured to determine whether a signal strength measured at the UTRAN frequency point is higher than the third threshold
  • the reselecting unit is specifically configured to: when a signal strength measured at the LTE frequency point is lower than the first threshold, and a signal strength measured at the UTRAN frequency is higher than the third When the threshold is reached, the cell is re-elected. The PS service is reselected into the UTRAN cell.
  • the parameter obtaining unit acquires the first threshold according to the SIB3, and specifically includes:
  • the LTE module further includes:
  • An offset obtaining unit configured to: before the parameter obtaining unit obtains the first threshold, according to a quality of service requirement of a PS service currently being performed by the terminal, and the corresponding offset of the different system cell Make a preset.
  • the technical solution provided by the embodiment of the present invention has the following advantages: The present invention reads the SIB3 sent by the network side and reads the SIB6 and/or the SIB7 when the cell reselection parameter is changed on the network side or the cell handover occurs in the same system. And measuring the signal strength at the LTE frequency and the different system frequency.
  • the first threshold and the different system reselection threshold are met, the cell reselection operation is performed, and the traditional terminal is overcome when it is set to the LTE only mode. Even if the LTE signal quality is poor, the disadvantage of the inter-system cell reselection operation cannot be performed, and the user can be given a better service experience.
  • FIG. 1 is a flowchart of a method for PS connection state reselection according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a method for PS connection state reselection according to Embodiment 2 of the present invention
  • FIG. 3 is a flowchart of a method for PS connection state reselection according to Embodiment 3 of the present invention.
  • FIG. 4 is a flowchart of a method for PS connection state reselection according to Embodiment 4 of the present invention.
  • FIG. 5 is a flowchart of a method for PS connection state reselection according to Embodiment 5 of the present invention.
  • FIG. 6 is a flowchart of a method for PS connection state reselection according to Embodiment 6 of the present invention.
  • FIG. 7 is a flowchart of a method for PS connection state reselection according to Embodiment 7 of the present invention.
  • Embodiment 8 is a flowchart of a method for PS connection state reselection according to Embodiment 8 of the present invention.
  • Embodiment 9 is a flowchart of a method for PS connection state reselection according to Embodiment 9 of the present invention.
  • FIG. 10 is a schematic structural diagram of a terminal connected by PS connection state according to Embodiment 10 of the present invention
  • 11 is a schematic diagram of a second structure of a different system module of a PS connection state reselected terminal according to Embodiment 10 of the present invention
  • FIG. 12 is a schematic diagram showing a third structure of a different system module of a PS connection state reselected terminal according to Embodiment 10 of the present invention.
  • FIG. 13 is a schematic diagram of a second structure of an LTE module of a PS connection state reselected terminal according to Embodiment 10 of the present invention. detailed description
  • an embodiment of the present invention provides a method for PS connection state reselection, where the method includes:
  • the third system message block SIB3 sent by the network side is read, and the sixth system message block SIB6 and/or the seventh system message block SIB7 are read;
  • the PS service is reselected to the corresponding different system cell. .
  • the SIB3 sent by the network side is read, and the SIB6 and/or the SIB7 are read, and the LTE frequency and the different system frequency are read.
  • Point measurement signal strength when the first threshold and the different system reselection threshold are met, perform a different system reselection operation of the cell, which overcomes the situation that the LTE signal quality is poor when the legacy terminal is set to the LTE only mode.
  • the shortcomings of the different system cell reselection operation cannot be performed, and the user can be given a better business experience.
  • an embodiment of the present invention provides a PS connection state reselection method, which is improved on the basis of Embodiment 1.
  • the terminal is an LTE/GSM single-card dual-standby terminal as an example.
  • the terminal can support the LTE and GSM network standards.
  • PS service state reselection the terminal resides in the LTE network.
  • the data service is established in the LTE network, and is in a connected state, and the terminal does not have a cell handover in a cell.
  • the connection state refers to a signaling connection between the terminal and the network side. In some scenarios, it is also called a service state, such as an RRC (Radio Resource Control) connection.
  • RRC Radio Resource Control
  • the handover of the cell refers to that the terminal moves geographically from one cell to another, and the two cells are the same-type cell, and the re-selection of the cell refers to the terminal from a standard. The cell is reselected to another cell for business.
  • a method for PS connection state reselection specifically comprising:
  • the cell reselection parameter includes at least a common cell reselection parameter, and further includes a UTRAN cell reselection parameter and/or a GERAN (GSM/EDGE Radio Access Network, GSM/EDGN, radio access network) cell reselection parameter.
  • GSM/EDGE Radio Access Network GSM/EDGN, radio access network
  • the public cell reselection parameter is a system message block SIB3, and is used for performing a system message block of a common parameter of a cell reselection of the same frequency, different frequency, and different system;
  • the UTRAN cell reselection parameter is a system message block SIB6, which is used for performing UTRAN different system cell reselection, and includes system message blocks including parameters such as UTRAN frequency and threshold value;
  • the GERAN cell reselection parameter is a system message block SIB7, which is used to perform GSM inter-system cell reselection of system message blocks including parameters such as GSM frequency points and threshold values.
  • the SIB System Information Block
  • the system message block sent in the next cycle is read.
  • the network side sends it every time T.
  • the terminal prepares to read the system message block between time 3T and 4T, the system message block sent by the network side at 4T is read.
  • the cell paging terminal notifies the terminal that the cell reselection parameter changes
  • the terminal monitors the cell reselection parameter to change, and reads the public cell reselection parameter and the GERAN cell reselection parameter.
  • the terminal used in this embodiment is an LTE/GSM single-card dual-standby terminal, when reading system reselection parameters, only the system message blocks SIB3 and SIB7 need to be read, where the read data is read.
  • the LTE frequency point and the GSM frequency point specified in the SIB3 and the SIB7 are respectively used to indicate the frequency of the signal strength measurement performed by the terminal in the LTE network and the GSM network, and the corresponding LTE cell threshold and the GSM cell threshold in the SIB3 and the SIB7;
  • the LTE cell threshold is specifically a CellReselectionServingFreqlnfo (s-NonlntraSearch) threshold.
  • the reselection parameter is the system message block SIB3.
  • the GSM cell threshold is specifically the frequency threshold requirement corresponding to the GSM cell.
  • the GSM cell threshold is included in the GERAN cell reselection parameter, system message block SIB7. 204. The terminal performs signal strength measurement on the LTE frequency point and the GSM frequency point.
  • Step 204 Determine whether the signal strength measured by the terminal at the LTE frequency is lower than the first threshold, and the signal strength measured by the terminal at the GSM frequency is higher than the second threshold. If yes, perform step 206, otherwise, return.
  • Step 204 In this embodiment, the first threshold is specifically an LTE cell threshold, and the second threshold is specifically a GSM cell threshold. Or,
  • the first threshold may be specifically a difference between an LTE cell threshold and a preset offset
  • the second threshold is specifically a GSM cell threshold.
  • the difference between the offsets is specifically required to be a preset offset for Qos (Quality of Service) according to different services, and the higher the Qos requirement is, the higher the value of the first threshold is required. Therefore, when the offset is preset, the higher the Qos requirement of the service, the smaller the value of the offset needs to be set.
  • the offset of the service with high Qos requirement is ldbm
  • the offset of Qos requires low service.
  • the quantity is 2 dbm to ensure that the service experience is not affected while achieving the purpose of keeping the PS service in the LTE network as much as possible.
  • step 206 determine whether the GSM cell and itself support DTM (Dual Transfer Mode, dual-issue dual-receipt), if not, go to step 207, and if yes, go to step 208;
  • DTM Direct Transfer Mode, dual-issue dual-receipt
  • step 207 Determine whether the currently ongoing CS service is completed. If yes, go to step 208. If not, wait for it, and return to determine whether the currently ongoing CS service is complete, and then perform the steps until the ongoing CS service is completed. 208;
  • the PS connection state reselection method provided by the embodiment of the present invention, when the terminal in the connected state changes the cell reselection parameter on the network side, receives the cell reselection parameter sent by the network side, respectively, in the LTE frequency point and the GSM frequency.
  • Point measurement signal strength when both the first threshold and the second threshold are met, the cell reselection operation is performed, which overcomes the problem that the real-time LTE signal quality is poor when the legacy terminal is set to the LTE only mode.
  • the disadvantage of not being able to perform cell reselection can give the user a better business experience.
  • an embodiment of the present invention provides a PS connection state reselection method, which is improved on the basis of Embodiment 1.
  • the terminal is an LTE/UTRAN single-card dual-standby terminal, and the terminal can support the LTE and UTRAN network standards.
  • the terminal Before the terminal performs PS service state reselection, the terminal resides in the LTE network.
  • the data service is established in the LTE network, and is in a connected state, and the terminal does not have a cell handover in a cell.
  • a method for PS connection state reselection specifically comprising:
  • the cell paging terminal notifies the terminal that the cell reselection parameter changes
  • the terminal monitors the cell reselection parameter to change, and reads the public cell reselection parameter and the UTRAN cell reselection parameter.
  • the terminal used in this embodiment is an LTE/UTRAN single-card dual-standby terminal, when reading system reselection parameters, only the system message blocks SIB3 and SIB6 need to be read, wherein the read data is read.
  • the LTE frequency point and the UTRAN frequency point specified in the SIB3 and the SIB6 are respectively used to indicate the frequency of the signal strength measurement performed by the terminal in the LTE network and the UTRAN network, and the corresponding LTE cell threshold and UTRAN cell threshold in the SIB3 and the SIB6;
  • the LTE cell threshold is specifically a CellReselectionServingFreqlnfo (s-NonlntraSearch) threshold.
  • the reselection parameter is the system message block SIB3.
  • the UTRAN cell threshold is specifically the frequency threshold requirement corresponding to the UTRAN cell.
  • the network side allows the terminal. Switching to the UTRAN cell, the UTRAN cell limit is included in the UTRAN cell reselection parameter, system message block SIB6.
  • the terminal performs signal strength measurement on the LTE frequency point and the UTRAN frequency point;
  • Step 304 Determine whether the signal strength measured by the terminal at the LTE frequency is lower than the first threshold, and the signal strength measured by the terminal at the UTRAN frequency is higher than the third threshold. If yes, perform step 306, otherwise, return.
  • the first threshold is specifically an LTE cell threshold
  • the third threshold is specifically a UTRAN cell threshold; or
  • the first threshold is specifically the difference between the LTE cell threshold and the preset offset
  • the third threshold is specifically the UTRAN cell threshold
  • the preset method of the offset is the same as that in Embodiment 2, and details are not described herein again.
  • the magnitude of the offset is related to the target network radio access system that the terminal is ready to reselect, for example, the UTRAN network and the GERAN network are the same due to the spread spectrum technology provided by the UTRAN.
  • UTRAN can provide QoS higher than that of GERAN network. Therefore, for services with the same QoS, the offset set when the target network is UTRAN can be lower than when the target network is GERAN, for example, the target network.
  • the UTRAN is set to 2dbm, and the target network is set to 4dbm by GERAN. This ensures that it is easier to migrate the terminal to the UTRAN network than to migrate to the GERAN network on the premise that the service QoS requirements can be guaranteed in the LTE network.
  • the PS connection state reselection method provided by the embodiment of the present invention enables the terminal in the connected state to receive the cell reselection parameters sent by the network side when the cell reselection parameter is changed on the network side, respectively, in the LTE frequency point and the UTRAN frequency.
  • Point measurement signal strength when both the first threshold and the third threshold are met, the cell reselection operation is performed, which overcomes the problem that the real-time LTE signal quality is poor when the legacy terminal is set to the LTE only mode.
  • the disadvantage of not being able to perform cell reselection can give the user a better business experience.
  • the embodiment of the present invention discloses a PS connection state reselection method, which is improved on the basis of the above embodiment.
  • the terminal is an LTE/GSM single-card dual-standby terminal as an example, and the terminal can support LTE and
  • a method for PS connection state reselection specifically comprising:
  • the terminal in the connected state switches the cell in the system
  • the terminal in the connected state switches the cell in the system, and specifically refers to the handover between the cells of the same type in the terminal, for example, from the current LTE cell to the target LTE cell due to the movement of the location.
  • the terminal used in this embodiment is an LTE/GSM single-card dual-standby terminal, when reading system reselection parameters, only the system message blocks SIB3 and SIB7 need to be read, where the read data is read.
  • the LTE frequency point and the GSM frequency point specified in the SIB3 and the SIB7 are respectively used to indicate the frequency of the signal strength measurement performed by the terminal in the LTE network and the GSM network, and the corresponding LTE cell threshold and the GSM cell threshold in the SIB3 and the SIB7;
  • the LTE cell threshold is specifically a CellReselectionServingFreqlnfo (s-NonlntraSearch) threshold.
  • the reselection parameter is the system message block SIB3.
  • the GSM cell threshold is specifically the frequency threshold requirement corresponding to the GSM cell.
  • the GSM cell threshold is included in the GERAN cell reselection parameter, system message block SIB7.
  • the terminal performs signal strength measurement on the LTE frequency point and the GSM frequency point.
  • Step 404 Determine whether the signal strength measured by the terminal at the LTE frequency is lower than the first threshold, and the signal strength measured by the terminal at the GSM frequency is higher than the second threshold. If yes, perform step 405, otherwise, return.
  • Step 403 In this embodiment, the first threshold is specifically an LTE cell threshold, and the second threshold is specifically a GSM cell threshold. or,
  • the first threshold may be specifically a difference between an LTE cell threshold and a preset offset
  • the second threshold is specifically a GSM cell threshold.
  • the difference of the offsets is specifically required to preset a preset offset for the Qos according to different services, and the higher the Qos requirement is, the higher the value of the first threshold is required. Therefore, when the offset is preset, The higher the Qos requirement of the service, the smaller the value of the offset needs to be set. For example, the offset of the service with high Qos requirement is ldbm, and the offset of the service with low Qos requirement is 2dbm.
  • the purpose of retaining the PS service in the LTE network is also to ensure that the service experience is not affected.
  • step 405. Determine whether the GSM cell and the self support the DTM. If not, go to step 406. If yes, go to step 407.
  • the PS connection state reselection method provided by the embodiment of the present invention enables the terminal in the connected state to read the cell reselection parameter when the intra-system cell handover occurs, and measure the signal strength at the LTE frequency point and the GSM frequency point respectively.
  • both the first threshold and the second threshold are met, the cell reselection operation is performed, which overcomes the problem that the legacy terminal cannot be used in the case of the LTE only mode, even if the LTE signal quality is poor.
  • the shortcomings of the selection can give the user a better business experience.
  • the terminal is an LTE/UTRAN single-card dual-standby terminal as an example.
  • the terminal can support the LTE and UTRAN network standards, and the terminal has a cell handover before the terminal performs the PS service state reselection.
  • the method of reselection is performed.
  • a method for PS connection state reselection specifically comprising:
  • the terminal in the connected state switches the cell in the system
  • the terminal in the connected state switches the cell in the system, and specifically refers to the handover between the cells of the same type in the terminal, for example, from the current LTE cell to the target LTE cell due to the movement of the location.
  • the terminal used in this embodiment is an LTE/UTRAN single-card dual-standby terminal, when reading system reselection parameters, only the system message blocks SIB3 and SIB6 need to be read, wherein the read data is read.
  • the LTE frequency point and the UTRAN frequency point specified in the SIB3 and the SIB6 are respectively used to indicate the frequency of the signal strength measurement performed by the terminal in the LTE network and the UTRAN network, and the corresponding LTE cell threshold and UTRAN cell threshold in the SIB3 and the SIB6;
  • the LTE cell threshold is specifically a CellReselectionServingFreqlnfo (s-NonlntraSearch) threshold.
  • the reselection parameter is the system message block SIB3.
  • the UTRAN cell threshold is specifically the frequency threshold requirement corresponding to the UTRAN cell.
  • the network side allows the terminal. Switching to the UTRAN cell, the UTRAN cell limit is included in the UTRAN cell reselection parameter, system message block SIB6.
  • the terminal performs signal strength measurement on the LTE frequency point and the UTRAN frequency point.
  • Step 503 Determine whether the signal strength measured by the terminal at the LTE frequency is lower than the first threshold, and the signal strength measured by the terminal at the UTRAN frequency is higher than the third threshold. If yes, perform step 505, otherwise, return.
  • the first threshold is specifically an LTE cell threshold
  • the third threshold is specifically a UTRAN cell threshold
  • the first threshold is specifically the difference between the LTE cell threshold and the preset offset
  • the third threshold is specifically the UTRAN cell threshold
  • the preset method of the offset is the same as that in Embodiment 3, and details are not described herein again.
  • the PS connection state reselection method provided by the embodiment of the present invention enables the terminal in the connected state to read the cell reselection parameter when the intra-system cell handover occurs, and measure the signal strength at the LTE frequency point and the UTRAN frequency point respectively.
  • both the first threshold and the third threshold are met, the cell reselection operation is performed, which overcomes the problem that the legacy system cannot be used in the case of the LTE only mode, even if the LTE signal quality is poor.
  • the shortcomings of the selection can give the user a better business experience.
  • the embodiment of the present invention provides a PS connection state reselection method, which is improved on the basis of the above embodiment.
  • the terminal is an LTE, GSM/UTRAN single-card dual-standby terminal as an example.
  • the terminal can support three network standards: LTE, GSM, and UTRAN.
  • LTE Long Term Evolution
  • GSM Global System for Mobile communications
  • UTRAN Universal Terrestrial Radio Access
  • a method for PS connection state reselection specifically comprising:
  • the cell reselection parameter includes at least a common cell reselection parameter, and further includes a UTRAN cell reselection parameter and/or a GERAN cell reselection parameter.
  • the public cell reselection parameter is a system message block SIB3, and is used for performing a system message block of a common parameter of a cell reselection of the same frequency, different frequency, and different system;
  • the UTRAN cell reselection parameter is a message block system SIB6, which is used for performing UTRAN different system cell reselection, and includes system message blocks including parameters such as UTRAN frequency and threshold value;
  • the GERAN cell reselection parameter is a system message block SIB7, which is used to perform GSM inter-system cell reselection of system message blocks including parameters such as GSM frequency points and threshold values.
  • the SIB is periodically sent by the network side.
  • the system message block sent in the next cycle is read.
  • the network side sends it once every time T, when the terminal is at time 3T to 4T.
  • the system message block sent by the network side at 4T is read.
  • the cell paging terminal notifies the terminal that the cell reselection parameter changes.
  • the terminal monitors the cell reselection parameter to change, and reads the public cell reselection parameter, the GERAN cell reselection parameter, and the UTRAN cell reselection parameter.
  • the terminal used in this embodiment is an LTE, GSM/UTRAN single-card dual-standby terminal, when reading system reselection parameters, it is necessary to read system message blocks SIB3, SIB6, and SIB7, where, read The data collected includes the LTE frequency, the UTRAN frequency, and the GSM frequency specified in SIB3, SIB6, and SIB7, which are used to indicate the frequency of signal strength measurement of the terminal in the LTE network, the UTRAN network, and the GSM network, and the SIB3 and SIB6, respectively.
  • SIB3, SIB6, and SIB7 Corresponding LTE cell threshold, UTRAN cell threshold, and GSM cell threshold in SIB7;
  • the LTE cell threshold is specifically a CellReselectionServingFreqlnfo (s-NonlntraSearch) threshold.
  • s-NonlntraSearch CellReselectionServingFreqlnfo
  • the reselection parameter is in the system message block SIB3;
  • the UTRAN cell threshold is specifically a frequency threshold requirement corresponding to the UTRAN cell.
  • the network side allows the terminal to switch to the UTRAN cell, and the UTRAN cell limit Included in the UTRAN cell reselection parameter, that is, the system message block SIB6;
  • the GSM cell threshold is specifically a frequency threshold requirement corresponding to the GSM cell.
  • the network side allows the terminal to switch to the GSM cell, and the GSM is small.
  • the zone threshold is included in the GERAN cell reselection parameter, system message block SIB7.
  • the terminal performs signal strength measurement on the LTE frequency point and the GSM frequency point.
  • the signal strength measurement performed by the terminal on the GSM frequency point further includes: determining whether the current CS service is camped on the GSM cell or the UTRAN cell, so as to determine a target different system for reselecting the PS service.
  • the terminal since the current terminal's CS service resides in the GSM network, the terminal will reselect the target different system cell as the GSM cell, so only the signals on the LTE frequency and the GSM frequency point are measured. strength.
  • Step 605. Determine whether the signal strength measured by the terminal at the LTE frequency is lower than the first threshold, and the signal strength measured by the terminal at the GSM frequency is higher than the second threshold. If yes, perform step 606, otherwise, return.
  • the first threshold is specifically an LTE cell threshold
  • the second threshold is specifically a GSM cell threshold.
  • the first threshold may be specifically a difference between an LTE cell threshold and a preset offset
  • the second threshold is specifically a GSM cell threshold.
  • the difference of the offsets is specifically required to preset a preset offset for the Qos according to different services, and the higher the Qos requirement is, the higher the value of the first threshold is required. Therefore, when the offset is preset, The higher the Qos requirement of the service, the smaller the value of the offset needs to be set. For example, the offset of the service with high Qos requirement is ldbm, and the offset of the service with low Qos requirement is 2dbm.
  • the purpose of retaining the PS service in the LTE network is also to ensure that the service experience is not affected.
  • step 606. Determine whether the GSM cell and the self support the DTM. If not, go to step 607. If yes, go to step 608.
  • Step 607. Determine whether the currently ongoing CS service is completed. If yes, go to step 608. If not, wait for it, and return to determine whether the currently ongoing CS service is complete, until the current CS service is completed. 608 ;
  • the PS connection state reselection method provided by the embodiment of the present invention enables a terminal in a connected state that supports three network standards and the CS service resides in the GSM network, and receives the cell reselection parameter on the network side by receiving
  • the cell reselection parameters sent by the network side measure the signal strengths at the LTE frequency point and the GSM frequency point respectively.
  • the embodiment of the present invention provides a PS connection state reselection method, which is improved on the basis of the above embodiment.
  • the terminal is an LTE, GSM/UTRAN single-card dual-standby terminal as an example.
  • the terminal can support three network standards: LTE, GSM, and UTRAN.
  • LTE Long Term Evolution
  • GSM Global System for Mobile communications
  • UTRAN Universal Terrestrial Radio Access
  • a method for PS connection state reselection specifically comprising:
  • the cell reselection parameter includes at least a common cell reselection parameter, and further includes a UTRAN cell reselection parameter or a GERAN cell reselection parameter.
  • the public cell reselection parameter is a system message block SIB3, and is used for performing a system message block of a common parameter of a cell reselection of the same frequency, different frequency, and different system;
  • the UTRAN cell reselection parameter is a message block system SIB6, which is used for performing UTRAN different system cell reselection, and includes system message blocks including parameters such as UTRAN frequency and threshold value;
  • the GERAN cell reselection parameter is a system message block SIB7, which is used to perform GSM inter-system cell reselection of system message blocks including parameters such as GSM frequency points and threshold values.
  • the SIB is periodically sent by the network side.
  • the system message block sent in the next cycle is read.
  • the network side sends it once every time T, when the terminal is at time 3T to 4T.
  • the system message block sent by the network side at 4T is read.
  • the cell paging terminal notifies the terminal that the cell reselection parameter changes.
  • the terminal monitors the cell reselection parameter to change, and reads the public cell reselection parameter, the GERAN cell reselection parameter, and the UTRAN cell reselection parameter.
  • the terminal used in this embodiment is an LTE, GSM/UTRAN single-card dual-standby terminal, when reading system reselection parameters, it is necessary to read system message blocks SIB3, SIB6, and SIB7, where, read The data collected includes the LTE frequency, the UTRAN frequency, and the GSM frequency specified in SIB3, SIB6, and SIB7, which are used to indicate the frequency of signal strength measurement of the terminal in the LTE network, the UTRAN network, and the GSM network, and the SIB3 and SIB6, respectively.
  • SIB3, SIB6, and SIB7 Corresponding LTE cell threshold, UTRAN cell threshold, and GSM cell threshold in SIB7;
  • the LTE cell threshold is specifically a CellReselectionServingFreqlnfo (s-NonlntraSearch) threshold.
  • s-NonlntraSearch CellReselectionServingFreqlnfo
  • the reselection parameter is in the system message block SIB3;
  • the UTRAN cell threshold is specifically a frequency threshold requirement corresponding to the UTRAN cell.
  • the network side allows the terminal to switch to the UTRAN cell, and the UTRAN cell limit Included in the UTRAN cell reselection parameter, that is, the system message block SIB6;
  • the GSM cell threshold is specifically the frequency threshold requirement corresponding to the GSM cell.
  • the network side allows the terminal to switch to the GSM cell, and the GSM cell threshold. It is included in the GERAN cell reselection parameter, system message block SIB7.
  • the terminal performs signal strength measurement on the LTE frequency point and the UTRAN frequency point.
  • the signal strength measurement performed by the terminal on the UTRAN frequency point further includes: determining whether the current CS service is camped on the GSM cell or the UTRAN cell, so as to determine the target different system for reselecting the PS service.
  • the terminal since the current terminal CS service resides in the UTRAN network, the terminal selects the reselected target network standard as the UTRAN network, and therefore only measures the LTE frequency and the UTRAN frequency. Signal strength.
  • Step 705. Determine whether the signal strength measured by the terminal at the LTE frequency is lower than the first threshold, and the signal strength measured by the terminal at the UTRAN frequency is higher than the third threshold. If yes, perform step 706. Otherwise, return.
  • the first threshold is specifically an LTE cell threshold
  • the third threshold is specifically a UTRAN cell threshold
  • the first threshold is specifically the difference between the LTE cell threshold and the preset offset
  • the third threshold is specifically the UTRAN cell threshold
  • the preset method of the offset is the same as that in Embodiment 2, and details are not described herein again.
  • the magnitude of the offset is related to the target network radio access system that the terminal is ready to reselect, for example, the UTRAN network and the GERAN network are the same due to the spread spectrum technology provided by the UTRAN.
  • UTRAN can provide QoS higher than that of GERAN network. Therefore, for services with the same QoS, the offset set when the target network is UTRAN can be lower than when the target network is GERAN, for example, the target network.
  • the UTRAN is set to 2dbm, and the target network is set to 4dbm by GERAN. This ensures that it is easier to migrate the terminal to the UTRAN network than to migrate to the GERAN network on the premise that the service QoS requirements can be guaranteed in the LTE network.
  • the PS connection state reselection method provided by the embodiment of the present invention enables a terminal in a connected state that supports three network standards and the CS service resides in the UTRAN network, and receives the cell reselection parameter on the network side by receiving
  • the cell reselection parameters sent by the network side measure the signal strengths at the LTE frequency point and the UTRAN frequency point respectively.
  • both the first threshold and the third threshold are met, the cell reselection is performed, which overcomes the fact that the traditional terminal is set. In the LTE only mode, even if the LTE signal quality is poor, the disadvantage of different system cell reselection cannot be performed, and the user can be better served.
  • the embodiment of the present invention provides a PS connection state reselection method, which is improved on the basis of the above embodiment.
  • the terminal is an LTE, GSM/UTRAN single-card dual-standby terminal as an example.
  • the terminal can support three network standards: LTE, GSM, and UTRAN.
  • LTE Long Term Evolution
  • GSM Global System for Mobile communications
  • UTRAN Universal Terrestrial Radio Access Network
  • a method for PS connection state reselection specifically comprising:
  • the cell reselection parameter includes at least a common cell reselection parameter, and further includes a UTRAN cell reselection parameter and/or a GERAN cell reselection parameter.
  • the public cell reselection parameter is a system message block SIB3, and is used for performing a system message block of a common parameter of a cell reselection of the same frequency, different frequency, and different system;
  • the UTRAN cell reselection parameter is a message block system SIB6, which is used for performing UTRAN different system cell reselection, and includes system message blocks including parameters such as UTRAN frequency and threshold value;
  • the GERAN cell reselection parameter is a system message block SIB7, which is used to perform GSM inter-system cell reselection of system message blocks including parameters such as GSM frequency points and threshold values.
  • the SIB is periodically sent by the network side.
  • the system message block sent in the next cycle is read.
  • the network side sends it once every time T, when the terminal is at time 3T to 4T.
  • the system message block sent by the network side at 4T is read.
  • the cell paging terminal notifies the terminal that the cell reselection parameter changes
  • the terminal monitors the cell reselection parameter to change, and reads the public cell reselection parameter and the GERAN cell reselection parameter.
  • the method further includes: the terminal determining whether the CS service of the terminal resides in the GSM network or the UTRAN network, and selecting the different system cell where the CS service of the terminal resides as the target system for reselecting the PS service. Community. Since in this embodiment, the CS service of the terminal currently resides in the GSM network, it is selected to read only the common cell reselection parameter and the GERAN cell reselection parameter.
  • the terminal changes the CS service camping network from the GSM network to the UTRAN network. 805.
  • the terminal reads the UTRAN cell reselection parameter.
  • the terminal performs signal strength measurement on the LTE frequency point and the UTRAN frequency point.
  • Step 807 Determine whether the signal strength measured by the terminal at the LTE frequency is lower than the first threshold, and the signal strength measured by the terminal at the UTRAN frequency is higher than the third threshold. If yes, perform step 808. Otherwise, return. Step 806;
  • the PS connection state reselection method provided by the embodiment of the present invention enables a terminal in a connected state to support three network standards, when the network side changes the cell reselection parameter and the CS service resident network standard type changes.
  • the signal strengths are measured at the LTE frequency and the UTRAN frequency respectively, and when the requirements of the first threshold and the third threshold are met, the cell reselection operation is performed, which overcomes the traditional terminal. Since it is set to the LTE only mode, even if the LTE signal quality is poor, the disadvantage of the inter-system cell reselection cannot be performed, and the user can be given a better service experience.
  • Example 9 Example 9
  • the embodiment of the present invention provides a PS connection state reselection method, which is improved on the basis of the above embodiment.
  • the terminal is an LTE, GSM/UTRAN single-card dual-standby terminal as an example.
  • the terminal can support three network standards: LTE, GSM, and UTRAN.
  • LTE Long Term Evolution
  • GSM Global System for Mobile communications
  • UTRAN Universal Terrestrial Radio Access Network
  • the PS service of the terminal resides in the LTE network, and the data service is established in the LTE network, and is in the connected state.
  • the current CS service resides in the UTRAN network, and after the terminal reads the SIB6, before the PS service is reselected,
  • the network standard of the network in which the CS service resides is changed from UTRAN to GSM.
  • the cell reselection parameter includes at least a common cell reselection parameter, and further includes a UTRAN cell reselection parameter or a GERAN cell reselection parameter.
  • the public cell reselection parameter is a system message block SIB3, and is used for performing a system message block of a common parameter of a cell reselection of the same frequency, different frequency, and different system;
  • the UTRAN cell reselection parameter is a message block system SIB6, which is used for performing UTRAN different system cell reselection, and includes system message blocks including parameters such as UTRAN frequency and threshold value;
  • the GERAN cell reselection parameter is a system message block SIB7, which is used to perform GSM inter-system cell reselection of system message blocks including parameters such as GSM frequency points and threshold values.
  • the SIB is periodically issued on the network side, and when the terminal reads, the system message sent in the next cycle is read. For example, the network side sends out every time T.
  • the terminal prepares to read the system message block between time 3T and 4T, it reads the system message block sent by the network side at 4T.
  • the cell paging terminal notifies the terminal that the cell reselection parameter changes.
  • the terminal monitors the cell reselection parameter to change, and reads the public cell reselection parameter and the UTRAN cell reselection parameter.
  • the method further includes: determining, by the terminal, whether the CS service of the terminal resides in the GSM network or the UTRAN network, and selecting a different system cell where the CS service of the terminal resides as the target system for reselecting the PS service. Community. Since in this embodiment, the CS service of the terminal currently resides in the UTRAN network, it is selected to read only the common cell reselection parameter and the UTRAN cell reselection parameter.
  • the terminal changes the CS service camping network from the UTRAN network to the GSM network.
  • the terminal reads the GERAN cell reselection parameter.
  • the terminal performs signal strength measurement on the LTE frequency point and the GSM frequency point.
  • Step 907. Determine whether the signal strength measured by the terminal at the LTE frequency is lower than the first threshold, and the signal strength measured by the terminal at the GSM frequency is higher than the second threshold. If yes, perform step 908, otherwise, return. Step 906;
  • step 910 determines whether the GSM cell and itself support DTM, and if yes, go to step 909, if not, go to step 910;
  • the PS connection state reselection method provided by the embodiment of the present invention enables a terminal in a connected state to support three network standards, when the network side changes the cell reselection parameter and the CS service resident network standard type changes.
  • the signal strengths are measured at the LTE frequency point and the GSM frequency point respectively.
  • both the first threshold and the second threshold are met, the cell reselection operation is performed, which overcomes the traditional terminal. Since it is set to the LTE only mode, even if the LTE signal quality is poor, the disadvantage of the inter-system cell reselection operation cannot be performed, and the user can be given a better service experience.
  • Example 10 Example 10
  • the embodiment of the present invention provides a terminal for PS connection state reselection.
  • the terminal includes an LTE module 101 and a different system module 102.
  • the LTE module 101 includes:
  • the system message reading unit 1011 is configured to: when the cell system message changes or the intra-system cell handover occurs, read the SIB3 sent by the network side, and read the SIB6 and/or the SIB7;
  • the parameter obtaining unit 1012 is configured to obtain a first threshold and an LTE frequency according to the SIB3, and obtain a different system reselection threshold and a different system frequency according to the SIB6 and/or the SIB7;
  • the first sending unit 1013 is configured to send the different system reselection threshold and the different system frequency to the different system module;
  • the first measuring unit 1014 is configured to perform signal strength measurement on the LTE frequency point;
  • the first determining unit 1015 is configured to determine whether the measured signal strength at the LTE frequency is lower than the first threshold.
  • the different system module 102 includes:
  • the second measuring unit 1021 is configured to receive the different system reselection thresholds and the different system frequency points sent by the first sending unit 1013, and perform signal strength measurement on the different system frequency points respectively;
  • a second determining unit 1022 configured to determine whether a signal strength measured at a different system frequency point is higher than a different system reselection threshold
  • the reselection unit 1023 is configured to start a cell reselection process when the signal strength measured on the LTE frequency point is lower than the first threshold and the signal strength measured at the different system frequency is higher than the different system reselection threshold , reselect the PS service to the corresponding different system cell.
  • SIB7 includes a second threshold and a global mobile communication system GSM frequency point;
  • the different system module 102 when the different system threshold is the second threshold and the different system frequency is the GSM frequency, as shown in FIG. 11, the different system module 102 further includes:
  • the third determining unit 1024 is configured to determine whether the terminal and the corresponding different system cell support the DTM before the reselecting unit 1023 reselects the PS service into the corresponding different system cell, and if yes, notify the reselecting unit 1023 to the PS. The service is reselected into the corresponding different system cell. If not, after waiting for the ongoing circuit switched CS service of the current terminal to complete, the notification reselecting unit 1023 reselects the PS service into the corresponding different system cell.
  • the third threshold and the UTRAN frequency point are included in the SIB6;
  • the different system reselection threshold includes a second threshold and/or a third threshold
  • the different system frequency points include GSM frequency and/or UTRAN frequency.
  • the different system module 102 further includes:
  • the fourth determining unit 1025 is configured to: before the system message reading unit 1011 reads the SIB3 sent by the network side, and before reading the SIB6 and/or the SIB7, obtain the different system cell where the CS service currently camped by the terminal is GSM.
  • the cell is also a UTRAN cell for the terminal to determine the target hetero-system cell to which the PS service is handed over.
  • the second measurement unit 1021 is specifically configured to perform signal strength measurement on the GSM frequency point;
  • the second determining unit 1022 is specifically configured to determine that the measured signal strength at the GSM frequency point is higher than the second threshold.
  • the reselecting unit 1023 is specifically configured to meet the signal strength measured at the LTE frequency point. Receiving a reselection command sent by the GSM cell, and reselecting the PS service into the GSM cell, when the signal strength measured by the GSM frequency is higher than the second threshold;
  • the second measurement unit 1021 is specifically configured to perform signal strength measurement on the UTRAN frequency point;
  • the second determining unit 1022 is specifically configured to determine whether the signal strength measured at the UTRAN frequency is higher than the third threshold;
  • the reselecting unit 1023 is specifically configured to: when the signal strength measured on the LTE frequency point is lower than the first threshold and the signal strength measured on the UTRAN frequency point is higher than the third threshold, the weight of the UTRAN cell is received. The command is selected to reselect the PS traffic into the UTRAN cell.
  • the parameter obtaining unit acquires the first threshold according to the SIB3, and specifically includes:
  • the LTE cell threshold in the SIB3 is read, and the LTE cell threshold is used as the first threshold;
  • the LTE cell threshold in the SIB3 is read, and the LTE cell threshold is offset from the preset offset to obtain a first threshold.
  • the LTE module 101 further includes:
  • the offset obtaining unit 1016 is configured to preset the offset according to the quality of service requirement of the PS service currently being performed by the terminal and the corresponding different system cell before the parameter obtaining unit obtains the first threshold.
  • the apparatus for reconnecting the PS connection state according to the embodiment of the present invention, when the terminal in the connected state changes the cell reselection parameter on the network side or the cell handover occurs in the same system, reads the SIB3 sent by the network side, and reads Take SIB6 and/or SIB7, and measure the signal strength at the LTE frequency and the different system frequency.
  • the first threshold and the different system reselection threshold are met, the cell reselection operation is performed, which overcomes the fact that the traditional terminal is set.
  • the apparatus for reselecting the PS connection state provided by the foregoing embodiment is only illustrated by the division of the foregoing functional modules. In actual applications, the function distribution may be completed by different functional modules as needed. The internal structure of the PS connected state reselected device is divided into different functional modules to complete all or part of the above description. Sub-function.
  • the apparatus for the PS connection state reselection provided by the foregoing embodiment is the same as the method embodiment of the PS connection state reselection.
  • All or part of the technical solutions provided by the above embodiments may be implemented by software programming, and the software program is stored in a readable storage medium such as a hard disk, an optical disk or a floppy disk in a computer.

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Abstract

本发明公开了一种PS连接态重选的方法和终端，属于通信领域。本发明在网络侧改变小区重选参数或在同系统内发生小区切换时，读取网络侧下发的SIB3，并读取SIB6和/或SIB7，并在LTE频点和异系统频点测量信号强度，当满足第一门限和异系统重选门限要求时，进行小区的重选操作，克服了传统终端中由于被设置为LTEonly模式时，即使LTE信号质量很差的情况下也不能进行异系统小区重选操作的缺点，可以给用户更好的业务体验。

Description

种 PS连接态重选的方法及终端 技术领域
本发明涉及通信领域， 特别涉及一种 PS连接态重选的方法及终端。 背景技术
在通信网络中， 目前常用的语音业务和短信业务主要由 CS (Circuit Switched, 电路 交换） 域提供， 数据业务主要由 PS (Packet Switched, 分组交换） 域提供。
随着技术的发展， LTE ( Long Term Evolution, 长期演进） 技术得到了快速的发展，
3GPP ( 3rd Generation Partnership Project, 第三代合作伙伴计划） 对 LTE 的语音方案 定位于最终采用 LTE+IMS ( IP Multimedia Subsystem, IP多媒体子系统） 方案支持语音业 务。 但是， 由于目前运营商部署 IMS 的节奏较晚， 在较长的一段时间内需要使用替代方案 CSFB (CS FallBack, 电路域回落）。
CSFB的技术实现是通过让驻留在 LTE小区中的终端通过包括重定向、 PS切换、 小区改 变命令等方式之一回落到 2G、 3G的 CS域中再进行传统的 CS域语音呼叫。 因此要求终端必 须是双模或多模终端， 并且 GSM (Global System For Mobile Communications, 全球移动 通信系统）、 UTRAN (UMTS Terrestrial Radio Access Network, 陆地无线接入网） 和 LTE 网络将长期共存。
现有的普通双模终端工作在双模模式时， 以 LTE/GSM双模终端为例进行说明， PS建立 在 LTE网络并在连接态时， LTE网络下发异系统 B1或 B2测量配置， 终端根据网络的测量配 置执行测量操作， 当满足测量配置的条件时上传测量报告， 网络指挥终端切换到异系统网 络。
但是， 发明人发现现有技术存在以下缺陷：
部分终端由于其芯片等原因的限制， LTE模块被设定固定工作在 LTE only模式下， LTE 网络不会给 LTE only的终端下发异系统 B1或 B2测量配置， 也不会向终端下发异系统切换 命令， 会导致在 LTE网络质量不能满足 PS业务要求的时候， 终端不能切换或重定向到异系 统中， 影响用户的使用效果。 发明内容 为了解决现有技术中存在的问题， 本发明提出了一种 PS连接态重选的方法及终端， 所 述技术方案如下：
一种分组交换 PS连接态重选的方法， 所述方法包括：
当小区系统消息发生改变或发生同系统内小区切换时， 读取网络侧下发的第三系统消 息块 SIB3, 并读取第六系统消息块 SIB6和 /或第七系统消息块 SIB7;
根据所述 SIB3获取第一门限、 长期演进 LTE频点， 根据所述 SIB6和 /或 SIB7获取异 系统重选门限、 异系统频点；
在所述 LTE频点及所述异系统频点上分别进行信号强度测量；
如果满足在所述 LTE频点上测量得到的信号强度低于所述第一门限且在所述异系统频 点上测量得到的信号强度高于所述异系统重选门限， 将 PS业务重选到对应的异系统小区。 进一步地， 所述 SIB7中包括第二门限和全球移动通信系统 GSM频点；
相应地， 当所述异系统门限为第二门限， 所述异系统频点为 GSM频点时， 所述将 PS业 务重选到对应的异系统小区之前， 所述方法还包括：
判断终端和所述对应的异系统小区是否支持双发双收 DTM;
如果是， 则将 PS业务重选到所述对应的异系统小区；
如果不是， 则等待当前所述终端正在进行的电路交换 CS业务完成后， 将 PS业务重选 到所述对应的异系统小区。
进一步地， 所述 SIB6中包括第三门限和陆地无线接入网 UTRAN频点；
相应地， 所述异系统重选门限包括第二门限和 /或第三门限；
所述异系统频点包括 GSM频点和 /或 UTRAN频点。
进一步地， 所述读取网络侧下发的 SIB3, 并读取 SIB6和 /或 SIB7之前， 所述方法还包 括：
获取所述终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区还是 UTRAN小区， 以便所述终端确定将所述 PS业务切换到的目标异系统小区。
进一步地， 所述在所述 LTE频点及所述异系统频点上分别进行信号强度测量， 如果满 足在所述 LTE频点上测量得到的信号强度低于所述第一门限且在所述异系统频点上测量得 到的信号强度高于所述异系统重选门限， 将 PS业务重选到所述对应的异系统小区， 具体包 括：
当所述终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区时， 在所述 LTE频点 及所述 GSM频点上分别进行信号强度测量， 如果满足在所述 LTE频点上测量得到的信号强 度低于所述第一门限且在所述 GSM频点上测量得到的信号强度高于所述第二门限， 将 PS业 务重选到 GSM小区；
或，
当所述终端当前正在进行的 CS业务驻留的异系统小区为 UTRAN小区时， 在所述 LTE频 点及所述 UTRAN频点上分别进行信号强度测量， 如果满足在所述 LTE频点上测量得到的信 号强度低于所述第一门限且在所述 UTRAN频点上测量得到的信号强度高于所述第三门限， 将 PS业务重选到 UTRAN小区。
进一步地， 所述根据所述 SIB3获取第一门限， 具体包括：
读取所述 SIB3中的 LTE小区门限， 并将所述 LTE小区门限作为所述第一门限； 或，
读取所述 SIB3中的 LTE小区门限， 并将所述 LTE小区门限与预设的偏移量取差值， 得 到所述第一门限。
进一步地， 所述得到所述第一门限之前， 所述方法还包括：
根据所述终端当前正在进行的 PS业务的服务质量要求和所述对应的异系统小区对所述 偏移量进行预设。 一种 PS连接态重选的终端， 其特征在于， 所述装置包括： LTE模块和异系统模块； 其中， 所述 LTE模块包括：
系统消息读取单元， 用于当小区系统消息发生改变或发生同系统内小区切换时， 读取 网络侧下发的 SIB3, 并读取 SIB6和 /或 SIB7;
参数获取单元，用于根据所述 SIB3获取第一门限、 LTE频点，根据所述 SIB6和 /或 SIB7 获取异系统重选门限、 异系统频点；
第一发送单元， 用于将所述异系统重选门限、 异系统频点发送给所述异系统模块； 第一测量单元， 用于在所述 LTE频点上进行信号强度测量；
第一判断单元， 用于判断在所述 LTE频点上测量得到的信号强度是否低于所述第一门 限；
所述异系统模块包括：
第二测量单元， 用于接收所述第一发送单元发送的所述异系统重选门限、 异系统频点， 并在所述异系统频点上分别进行信号强度测量；
第二判断单元， 用于判断在所述异系统频点上测量得到的信号强度是否高于所述异系 统重选门限； 重选单元， 用于在满足在所述 LTE频点上测量得到的信号强度低于所述第一门限且在 所述异系统频点上测量得到的信号强度高于所述异系统重选门限时， 接收对应的异系统小 区发送的重选命令， 将 PS业务重选到所述对应的异系统小区中。 进一步地， 所述 SIB7中包括第二门限和 GSM频点；
相应地， 当所述异系统门限为第二门限， 所述异系统频点为 GSM频点时， 所述异系统 模块还包括：
第三判断单元， 用于在所述重选单元将 PS业务重选到所述对应的异系统小区中之前， 判断终端和所述对应的异系统小区是否支持 DTM， 如果是， 则通知所述重选单元将 PS业务 重选到所述对应的异系统小区中， 如果不是， 则等待当前所述终端正在进行的电路交换 CS 业务完成后， 通知所述重选单元将 PS业务重选到所述对应的异系统小区中。
进一步地， 所述 SIB6中包括第三门限和 UTRAN频点；
相应地， 所述异系统重选门限包括第二门限和 /或第三门限；
所述异系统频点包括 GSM频点和 /或 UTRAN频点。
进一步地， 所述异系统模块还包括：
第四判断单元， 用于在所述系统消息读取单元读取网络侧下发的 SIB3, 并读取 SIB6和 /或 SIB7之前， 获取所述终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区还是 UTRAN小区， 以便所述终端确定将所述 PS业务切换到的目标异系统小区。
进一步地， 当所述终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区时， 所述 第二测量单元， 具体的用于在所述 GSM频点上进行信号强度测量；
所述第二判断单元， 具体的用于判断在所述 GSM频点上测量得到的信号强度高于所述 第二门限；
所述重选单元， 具体的用于在满足在所述 LTE频点上测量得到的信号强度低于所述第 一门限且在所述 GSM频点上测量得到的信号强度高于所述二门限时， 接收 GSM小区发送的 重选命令， 将 PS业务重选到所述 GSM小区中；
相应地， 当所述终端当前正在进行的 CS业务驻留的异系统小区为 UTRAN小区时， 所述 第二测量单元， 具体的用于在所述 UTRAN频点上进行信号强度测量；
所述第二判断单元， 具体的用于判断在所述 UTRAN频点上测量得到的信号强度是否高 于所述第三门限；
所述重选单元， 具体的用于在满足在所述 LTE频点上测量得到的信号强度低于所述第 一门限且在所述 UTRAN频点上测量得到的信号强度高于所述第三门限时， 启动小区重选过 程， 将 PS业务重选到所述 UTRAN小区中。
进一步地， 所述参数获取单元根据 SIB3获取第一门限， 具体包括：
读取所述 SIB3中的 LTE小区门限， 并将所述 LTE小区门限作为所述第一门限； 或，
读取所述 SIB3中的 LTE小区门限， 并将所述 LTE小区门限与预设的偏移量取差值， 得 到所述第一门限。
进一步地， 所述 LTE模块还包括：
偏移量获取单元， 用于在所述参数获取单元得到所述第一门限之前， 根据所述终端当 前正在进行的 PS业务的服务质量要求和所述对应的异系统小区对所述偏移量进行预设。 本发明实施例提供的技术方案的有益效果是： 本发明在网络侧改变小区重选参数或在 同系统内发生小区切换时， 读取网络侧下发的 SIB3, 并读取 SIB6和 /或 SIB7, 并在 LTE频 点和异系统频点测量信号强度， 当满足第一门限和异系统重选门限要求时， 进行小区的重 选操作， 克服了传统终端中由于被设置为 LTE only模式时， 即使 LTE信号质量很差的情况 下也不能进行异系统小区重选操作的缺点， 可以给用户更好的业务体验。 附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描述中所需要使用的 附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本 领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的 附图。
图 1为本发明实施例 1所提供的一种 PS连接态重选的方法的流程图；
图 2为本发明实施例 2所提供的一种 PS连接态重选的方法的流程图；
图 3为本发明实施例 3所提供的一种 PS连接态重选的方法的流程图；
图 4为本发明实施例 4所提供的一种 PS连接态重选的方法的流程图；
图 5为本发明实施例 5所提供的一种 PS连接态重选的方法的流程图；
图 6为本发明实施例 6所提供的一种 PS连接态重选的方法的流程图；
图 7为本发明实施例 7所提供的一种 PS连接态重选的方法的流程图；
图 8为本发明实施例 8所提供的一种 PS连接态重选的方法的流程图；
图 9为本发明实施例 9所提供的一种 PS连接态重选的方法的流程图；
图 10为本发明实施例 10所提供的一种 PS连接态重选的终端的结构示意图； 图 11为本发明实施例 10所提供的一种 PS连接态重选的终端的异系统模块的第二种结 构示意图；
图 12为本发明实施例 10所提供的一种 PS连接态重选的终端的异系统模块的第三种结 构示意图；
图 13为本发明实施例 10所提供的一种 PS连接态重选的终端的 LTE模块的第二种结构 示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚， 下面将结合附图对本发明实施方式作 进一步地详细描述。
实施例 1
如图 1所示， 本发明实施例提供了一种 PS连接态重选的方法， 该方法包括：
101、 当小区系统消息发生改变或发生同系统内小区切换时， 读取网络侧下发的第三系 统消息块 SIB3, 并读取第六系统消息块 SIB6和 /或第七系统消息块 SIB7;
102、 根据 SIB3获取第一门限、 LTE频点， 根据 SIB6和 /或 SIB7获取异系统重选门限、 异系统频点；
103、 在 LTE频点及异系统频点上分别进行信号强度测量；
104、 如果满足在 LTE频点上测量得到的信号强度低于第一门限且在异系统频点上测量 得到的信号强度高于异系统重选门限， 将 PS业务重选到对应的异系统小区。
本发明实施例通过在网络侧改变小区重选参数或在同系统内发生小区切换时， 读取网 络侧下发的 SIB3, 并读取 SIB6和 /或 SIB7, 并在 LTE频点和异系统频点测量信号强度， 当 满足第一门限和异系统重选门限要求时， 进行小区的异系统重选操作， 克服了传统终端中 由于被设置为 LTE only模式时， 即使 LTE信号质量很差的情况下也不能进行异系统小区重 选操作的缺点， 可以给用户更好的业务体验。 实施例 2
如图 2所示， 本发明实施例提供了一种 PS连接态重选的方法， 是在实施例 1的基础之 上改进而来。
在本实施例中， 以终端为 LTE/GSM单卡双待终端为例进行说明， 该终端可支持 LTE和 GSM网络制式， 在终端进行 PS业务态重选前， 终端驻留在 LTE网络中， 并在 LTE网络中建 立数据业务， 处于连接态， 且终端驻留在一个小区中未发生小区的切换。 其中， 连接态是指终端和网络侧有信令连接， 在某些场景下也被称为业务态， 例如 RRC (Radio Resource Control , 无线资源控制协议） 连接。
需要说明的是， 在本发明中， 小区的切换指终端在地域上从一个小区移动到另一个小 区， 且这两个小区为同制式小区， 小区的重选指的是将终端从一个制式的小区重选到另一 个制式的小区进行业务。
一种 PS连接态重选的方法， 具体包括：
201、 当网络侧改变小区重选参数时， 在小区中进行广播；
在本实施例中， 小区重选参数至少包括公共小区重选参数， 还包括 UTRAN小区重选参 数和 /或 GERAN (GSM/EDGE Radio Access Network, GSM/EDGN, 无线接入网） 小区重选参数。
进一步地， 公共小区重选参数为系统消息块 SIB3, 用于终端做同频、 异频、 异系统的 小区重选的公共参数的系统消息块；
UTRAN 小区重选参数为系统消息块 SIB6, 用于终端做 UTRAN异系统小区重选的包括 UTRAN频点和门限值等参数的系统消息块；
GERAN小区重选参数为系统消息块 SIB7, 用于终端做 GSM异系统小区重选的包括 GSM 频点和门限值等参数的系统消息块。
其中， SIB (System Information Block, 系统消息块） 为网络侧周期性的进行下发， 终端读取时， 读取下一个周期下发的系统消息块， 例如， 网络侧每隔时间 T 下发一次， 当 终端在时间 3T到 4T之间准备读取系统消息块时， 则读取 4T时网络侧下发的系统消息块。
202、 小区寻呼终端， 通知终端小区重选参数发生变化；
203、 终端监听到小区重选参数发生变化， 读取公共小区重选参数和 GERAN小区重选参 数；
需要说明的是， 由于本实施例所使用的终端为 LTE/GSM单卡双待终端， 因此在读取系 统重选参数时， 只需要读取系统消息块 SIB3和 SIB7, 其中， 读取的数据包括 SIB3和 SIB7 中规定的 LTE频点和 GSM频点， 分别用于指示终端在 LTE网络和 GSM网络进行信号强度测 量的频点， 以及 SIB3和 SIB7中对应的 LTE小区门限和 GSM小区门限；
其中， LTE小区门限具体的为 CellReselectionServingFreqlnfo ( s-NonlntraSearch) 门限， 当终端在 LTE小区下在 LTE频点进行信号强度测量满足 LTE小区门限要求时， 允许 进行小区重选， LTE小区门限包含在公共小区重选参数即系统消息块 SIB3中， GSM小区门 限具体的为 GSM小区对应的频点门限要求， 当终端在 GSM小区中在 GSM频点进行信号强度 测量满足 GSM小区门限要求时， 网络侧允许终端切换到该 GSM小区中， GSM小区门限包含在 GERAN小区重选参数即系统消息块 SIB7中。 204、 终端在 LTE频点和 GSM频点上进行信号强度测量；
205、 判断终端在 LTE频点上测量得到的信号强度是否低于第一门限， 且终端在 GSM频 点上测量得到的信号强度高于第二门限， 如果是， 则执行步骤 206， 否则， 返回步骤 204; 在本实施例中， 第一门限具体的为 LTE小区门限， 第二门限具体的为 GSM小区门限。 或，
第一门限还可以具体的为 LTE小区门限与预设的偏移量的差值，第二门限具体的为 GSM 小区门限。
其中， 上述偏移量的差值具体的根据不同的业务对于 Qos (Qual ity of Service, 服务 质量） 要求预设偏移量， 对 Qos 要求越高的业务则要求第一门限的值越高， 因此， 在预设 偏移量时， 业务对 Qos要求越高则需要将偏移量的值设置的越小， 例如 Qos要求高的业务 的偏移量是 ldbm， Qos要求低的业务的偏移量是 2dbm， 以保证在达到尽量将 PS业务保留在 LTE网络中目的的同时也能保证业务体验不受影响。
206、 判断 GSM小区和自身是否支持 DTM (Dual Transfer Mode, 双发双收）， 如果不是， 执行步骤 207， 如果是， 执行步骤 208;
207、 判断当前正在进行的 CS业务是否完成， 如果是， 执行步骤 208， 如果不是， 则进 行等待， 并返回判断当前正在进行的 CS业务是否完成， 直到当前正在进行的 CS业务完成 后再执行步骤 208;
208、 将终端的 PS业务从 LTE小区重选到 GSM小区。 本发明实施例所提供的 PS连接态重选的方法， 使得处于连接态的终端在网络侧改变小 区重选参数时， 通过接收网络侧发送的小区重选参数， 分别在 LTE频点和 GSM频点测量信 号强度， 当均满足第一门限和第二门限的要求时， 进行小区的重选操作， 克服了传统终端 中由于被设置为 LTE only模式时， 即时 LTE信号质量很差的情况下也不能进行小区重选的 缺点， 可以给用户更好的业务体验。 实施例 3
如图 3所示， 本发明实施例提供了一种 PS连接态重选的方法， 是在实施例 1的基础之 上改进而来。
在本实施例中， 以终端为 LTE/UTRAN单卡双待终端为例进行说明， 该终端可支持 LTE 和 UTRAN网络制式， 在终端进行 PS业务态重选前， 终端驻留在 LTE网络中， 并在 LTE网络 中建立数据业务， 处于连接态， 且终端驻留在一个小区中未发生小区的切换。 一种 PS连接态重选的方法， 具体包括：
301、 当网络侧改变小区重选参数时， 在小区中进行广播；
302、 小区寻呼终端， 通知终端小区重选参数发生变化；
303、 终端监听到小区重选参数发生变化， 读取公共小区重选参数和 UTRAN小区重选参 数。
需要说明的是， 由于本实施例所使用的终端为 LTE/UTRAN单卡双待终端， 因此在读取 系统重选参数时，只需要读取系统消息块 SIB3和 SIB6,其中，读取的数据包括 SIB3和 SIB6 中规定的 LTE频点和 UTRAN频点， 分别用于指示终端在 LTE网络和 UTRAN网络进行信号强 度测量的频点， 以及 SIB3和 SIB6中对应的 LTE小区门限和 UTRAN小区门限；
其中， LTE小区门限具体的为 CellReselectionServingFreqlnfo ( s-NonlntraSearch) 门限， 当终端在 LTE小区下在 LTE频点进行信号强度测量满足 LTE小区门限要求时， 允许 进行小区重选， LTE小区门限包含在公共小区重选参数即系统消息块 SIB3中， UTRAN小区 门限具体的为 UTRAN小区对应的频点门限要求， 当终端在 UTRAN小区中在 UTRAN频点进行 信号强度测量满足 UTRAN小区门限要求时， 网络侧允许终端切换到该 UTRAN小区中， UTRAN 小区限包含在 UTRAN小区重选参数即系统消息块 SIB6中。
304、 终端在 LTE频点和 UTRAN频点上进行信号强度测量；
305、 判断终端在 LTE频点上测量得到的信号强度是否低于第一门限， 且终端在 UTRAN 频点上测量得到的信号强度高于第三门限， 如果是， 则执行步骤 306， 否则， 返回步骤 304; 在本实施例中， 第一门限具体的为 LTE小区门限， 第三门限具体的为 UTRAN小区门限； 或，
第一门限具体的为 LTE小区门限与预设的偏移量的差值， 第三门限具体的为 UTRAN小 区门限；
其中， 偏移量的预设方法与实施例 2中相同， 这里不再赘述。
需要说明的是， 在预设偏移量时， 偏移量的大小与终端准备重选到的目标网络无线接 入制式有关， 例如由于 UTRAN提供的扩频技术导致在 UTRAN网络和 GERAN网络处于相同载 干比的情况下， UTRAN却能提供高于 GERAN网络的 Qos， 所以对于相同 Qos要求的业务， 当 目标网络是 UTRAN时设置的偏移量可以比目标网络是 GERAN时要低，例如目标网络是 UTRAN 设置为 2dbm， 目标网络是 GERAN设置为 4dbm， 这样保证在 LTE网络中能保证业务 Qos要求 的前提下使终端迁移到 UTRAN网络中比迁移到 GERAN网络中要容易。
306、 将终端的 PS业务从 LTE小区重选到 UTRAN小区。 本发明实施例所提供的 PS连接态重选的方法， 使得处于连接态的终端在网络侧改变小 区重选参数时， 通过接收网络侧发送的小区重选参数， 分别在 LTE频点和 UTRAN频点测量 信号强度， 当均满足第一门限和第三门限的要求时， 进行小区的重选操作， 克服了传统终 端中由于被设置为 LTE only模式时， 即时 LTE信号质量很差的情况下也不能进行小区重选 的缺点， 可以给用户更好的业务体验。 实施例 4
如图 4所示， 本发明实施例公开了一种 PS连接态重选的方法， 是在上述实施例的基础 之上改进而来。
在本实施例中， 以终端为 LTE/GSM单卡双待终端为例进行说明， 该终端可支持 LTE和
GSM网络制式， 在终端进行 PS业务态重选前， 终端发生了小区的切换的情况下进行重选的 方法。
一种 PS连接态重选的方法， 具体包括：
401、 连接态的终端在系统内切换小区；
需要说明的是， 连接态的终端在系统内切换小区， 具体是指终端发生同制式的小区之 间的切换， 例如由于位置的移动， 从当前 LTE小区移动到了目标 LTE小区中。
402、 读取公共小区重选参数和 GERAN小区重选参数。
需要说明的是， 由于本实施例所使用的终端为 LTE/GSM单卡双待终端， 因此在读取系 统重选参数时， 只需要读取系统消息块 SIB3和 SIB7, 其中， 读取的数据包括 SIB3和 SIB7 中规定的 LTE频点和 GSM频点， 分别用于指示终端在 LTE网络和 GSM网络进行信号强度测 量的频点， 以及 SIB3和 SIB7中对应的 LTE小区门限和 GSM小区门限；
其中， LTE小区门限具体的为 CellReselectionServingFreqlnfo ( s-NonlntraSearch) 门限， 当终端在 LTE小区下在 LTE频点进行信号强度测量满足 LTE小区门限要求时， 允许 进行小区重选， LTE小区门限包含在公共小区重选参数即系统消息块 SIB3中， GSM小区门 限具体的为 GSM小区对应的频点门限要求， 当终端在 GSM小区中在 GSM频点进行信号强度 测量满足 GSM小区门限要求时， 网络侧允许终端切换到该 GSM小区中， GSM小区门限包含在 GERAN小区重选参数即系统消息块 SIB7中。
403、 终端在 LTE频点和 GSM频点上进行信号强度测量；
404、 判断终端在 LTE频点上测量得到的信号强度是否低于第一门限， 且终端在 GSM频 点上测量得到的信号强度高于第二门限， 如果是， 则执行步骤 405， 否则， 返回步骤 403; 在本实施例中， 第一门限具体的为 LTE小区门限， 第二门限具体的为 GSM小区门限。 或，
第一门限还可以具体的为 LTE小区门限与预设的偏移量的差值，第二门限具体的为 GSM 小区门限。
其中， 上述偏移量的差值具体的根据不同的业务对于 Qos要求预设偏移量， 对 Qos要 求越高的业务则要求第一门限的值越高， 因此， 在预设偏移量时， 业务对 Qos 要求越高则 需要将偏移量的值设置的越小， 例如 Qos要求高的业务的偏移量是 ldbm, Qos要求低的业 务的偏移量是 2dbm， 以保证在达到尽量将 PS业务保留在 LTE网络中目的的同时也能保证业 务体验不受影响。
405、 判断 GSM小区和自身是否支持 DTM， 如果不是， 执行步骤 406， 如果是， 执行步 骤 407 ;
406、 判断当前正在进行的 CS业务是否完成， 如果是， 执行步骤 407， 如果不是， 则进 行等待， 并返回判断当前正在进行的 CS业务是否完成， 直到当前正在进行的 CS业务完成 后再执行步骤 407 ;
407、 将终端的 PS业务从 LTE小区重选到 GSM小区。 本发明实施例所提供的 PS连接态重选的方法， 使得处于连接态的终端在发生系统内小 区切换时， 读取小区重选参数， 分别在 LTE频点和 GSM频点测量信号强度， 当均满足第一 门限和第二门限的要求时，进行小区的重选操作，克服了传统终端中由于被设置为 LTE only 模式时， 即使 LTE信号质量很差的情况下也不能进行异系统小区重选的缺点， 可以给用户 更好的业务体验。 实施例 5
如图 5所示，本发明一种 PS连接态重选的方法，是在上述实施例的基础之上改进而来。 在本实施例中， 以终端为 LTE/UTRAN单卡双待终端为例进行说明， 该终端可支持 LTE 和 UTRAN网络制式， 在终端进行 PS业务态重选前， 终端发生了小区的切换的情况下进行重 选的方法。
一种 PS连接态重选的方法， 具体包括：
501、 连接态的终端在系统内切换小区；
需要说明的是， 连接态的终端在系统内切换小区， 具体是指终端发生同制式的小区之 间的切换， 例如由于位置的移动， 从当前 LTE小区移动到了目标 LTE小区中。
502、 读取公共小区重选参数和 UTRAN小区重选参数。 需要说明的是， 由于本实施例所使用的终端为 LTE/UTRAN单卡双待终端， 因此在读取 系统重选参数时，只需要读取系统消息块 SIB3和 SIB6,其中，读取的数据包括 SIB3和 SIB6 中规定的 LTE频点和 UTRAN频点， 分别用于指示终端在 LTE网络和 UTRAN网络进行信号强 度测量的频点， 以及 SIB3和 SIB6中对应的 LTE小区门限和 UTRAN小区门限；
其中， LTE小区门限具体的为 CellReselectionServingFreqlnfo ( s-NonlntraSearch) 门限， 当终端在 LTE小区下在 LTE频点进行信号强度测量满足 LTE小区门限要求时， 允许 进行小区重选， LTE小区门限包含在公共小区重选参数即系统消息块 SIB3中， UTRAN小区 门限具体的为 UTRAN小区对应的频点门限要求， 当终端在 UTRAN小区中在 UTRAN频点进行 信号强度测量满足 UTRAN小区门限要求时， 网络侧允许终端切换到该 UTRAN小区中， UTRAN 小区限包含在 UTRAN小区重选参数即系统消息块 SIB6中。
503、 终端在 LTE频点和 UTRAN频点上进行信号强度测量；
504、 判断终端在 LTE频点上测量得到的信号强度是否低于第一门限， 且终端在 UTRAN 频点上测量得到的信号强度高于第三门限， 如果是， 则执行步骤 505， 否则， 返回步骤 503; 在本实施例中， 第一门限具体的为 LTE小区门限， 第三门限具体的为 UTRAN小区门限； 或，
第一门限具体的为 LTE小区门限与预设的偏移量的差值， 第三门限具体的为 UTRAN小 区门限；
其中， 偏移量的预设方法与实施例 3中相同， 这里不再赘述。
505、 将终端的 PS业务从 LTE小区重选到 UTRAN小区。 本发明实施例所提供的 PS连接态重选的方法， 使得处于连接态的终端在发生系统内小 区切换时， 读取小区重选参数， 分别在 LTE频点和 UTRAN频点测量信号强度， 当均满足第 一门限和第三门限的要求时， 进行小区的重选操作， 克服了传统终端中由于被设置为 LTE only模式时， 即使 LTE信号质量很差的情况下也不能进行异系统小区重选的缺点， 可以给 用户更好的业务体验。 实施例 6
如图 6所示， 本发明实施例提供了一种 PS连接态重选的方法， 是在上述实施例的基础 之上改进而来。
在本实施例中， 以终端为 LTE， GSM/UTRAN单卡双待终端为例进行说明， 其中， 该终端 可支持 LTE、 GSM和 UTRAN三种网络制式， 在终端进行 PS业务态重选前， 终端的 PS业务驻 留在 LTE网络中， 并在 LTE网络中建立数据业务， 处于连接态， 当前 CS业务驻留在 GSM网 络中。
一种 PS连接态重选的方法， 具体包括：
601、 当网络侧改变小区重选参数时， 在小区中进行广播；
在本实施例中， 小区重选参数至少包括公共小区重选参数， 还包括 UTRAN小区重选参 数和 /或 GERAN小区重选参数。
进一步地， 公共小区重选参数为系统消息块 SIB3, 用于终端做同频、 异频、 异系统的 小区重选的公共参数的系统消息块；
UTRAN 小区重选参数为消息块系统 SIB6, 用于终端做 UTRAN异系统小区重选的包括 UTRAN频点和门限值等参数的系统消息块；
GERAN小区重选参数为系统消息块 SIB7, 用于终端做 GSM异系统小区重选的包括 GSM 频点和门限值等参数的系统消息块。
其中， SIB为网络侧周期性的进行下发， 终端读取时， 读取下一个周期下发的系统消息 块， 例如， 网络侧每隔时间 T下发一次， 当终端在时间 3T到 4T之间准备读取系统消息块 时， 则读取 4T时网络侧下发的系统消息块。
602、 小区寻呼终端， 通知终端小区重选参数发生变化；
603、 终端监听到小区重选参数发生变化， 读取公共小区重选参数、 GERAN小区重选参 数和 UTRAN小区重选参数。
需要说明的是， 由于本实施例所使用的终端为 LTE、 GSM/UTRAN单卡双待终端， 因此在 读取系统重选参数时， 需要读取系统消息块 SIB3、 SIB6 和 SIB7, 其中， 读取的数据包括 SIB3、 SIB6和 SIB7中规定的 LTE频点、 UTRAN频点和 GSM频点， 分别用于指示终端在 LTE 网络、 UTRAN网络和 GSM网络进行信号强度测量的频点， 以及 SIB3、 SIB6和 SIB7中对应的 LTE小区门限、 UTRAN小区门限和 GSM小区门限；
其中， LTE小区门限具体的为 CellReselectionServingFreqlnfo ( s-NonlntraSearch) 门限， 当终端在 LTE小区下在 LTE频点进行信号强度测量满足 LTE小区门限要求时， 允许 进行小区重选， LTE小区门限包含在公共小区重选参数即系统消息块 SIB3中；
UTRAN小区门限具体的为 UTRAN小区对应的频点门限要求， 当终端在 UTRAN小区中在 UTRAN频点进行信号强度测量满足 UTRAN小区门限要求时， 网络侧允许终端切换到该 UTRAN 小区中， UTRAN小区限包含在 UTRAN小区重选参数即系统消息块 SIB6中；
GSM小区门限具体的为 GSM小区对应的频点门限要求，当终端在 GSM小区中在 GSM频点 进行信号强度测量满足 GSM小区门限要求时， 网络侧允许终端切换到该 GSM小区中， GSM小 区门限包含在 GERAN小区重选参数即系统消息块 SIB7中。
604、 终端在 LTE频点和 GSM频点上进行信号强度测量；
在本步骤中， 需要说明的是， 终端在 GSM频点上进行信号强度测量还包括： 判断当前 的 CS业务是驻留在 GSM小区还是 UTRAN小区， 以便确定对 PS业务进行重选的目标异系统 小区， 在本实施例中， 由于当前终端的 CS业务驻留在 GSM网络中， 因此， 终端将重选的目 标异系统小区为 GSM小区， 因此只测量在 LTE频点和 GSM频点上的信号强度。
605、 判断终端在 LTE频点上测量得到的信号强度是否低于第一门限， 且终端在 GSM频 点上测量得到的信号强度高于第二门限， 如果是， 则执行步骤 606， 否则， 返回步骤 604; 在本实施例中， 第一门限具体的为 LTE小区门限， 第二门限具体的为 GSM小区门限。 或，
第一门限还可以具体的为 LTE小区门限与预设的偏移量的差值，第二门限具体的为 GSM 小区门限。
其中， 上述偏移量的差值具体的根据不同的业务对于 Qos要求预设偏移量， 对 Qos要 求越高的业务则要求第一门限的值越高， 因此， 在预设偏移量时， 业务对 Qos 要求越高则 需要将偏移量的值设置的越小， 例如 Qos要求高的业务的偏移量是 ldbm, Qos要求低的业 务的偏移量是 2dbm， 以保证在达到尽量将 PS业务保留在 LTE网络中目的的同时也能保证业 务体验不受影响。
606、 判断 GSM小区和自身是否支持 DTM， 如果不是， 执行步骤 607， 如果是， 执行步 骤 608 ;
607、 判断当前正在进行的 CS业务是否完成， 如果是， 执行步骤 608， 如果不是， 则进 行等待， 并返回判断当前正在进行的 CS业务是否完成， 直到当前正在进行的 CS业务完成 后再执行步骤 608 ;
608、 将终端的 PS业务从 LTE小区重选到 GSM小区。 本发明实施例所提供的 PS连接态重选的方法， 使得处于连接态的可支持三种网络制式 且 CS业务驻留在 GSM网络中的终端， 在网络侧改变小区重选参数时， 通过接收网络侧发送 的小区重选参数， 分别在 LTE频点和 GSM频点测量信号强度， 当均满足第一门限和第二门 限的要求时， 进行小区的重选操作， 克服了传统终端中由于被设置为 LTE only模式时， 即 使 LTE信号质量很差的情况下也不能进行异系统小区重选的缺点， 可以给用户更好的业务 体验。 实施例 7
如图 7所示， 本发明实施例提供了一种 PS连接态重选的方法， 是在上述实施例的基础 之上改进而来。
在本实施例中， 以终端为 LTE， GSM/UTRAN单卡双待终端为例进行说明， 其中， 该终端 可支持 LTE、 GSM和 UTRAN三种网络制式， 在终端进行 PS业务态重选前， 终端的 PS业务驻 留在 LTE网络中， 并在 LTE网络中建立数据业务， 处于连接态， 当前 CS业务驻留在 UTRAN 网络中。
一种 PS连接态重选的方法， 具体包括：
701、 当网络侧改变小区重选参数时， 在小区中进行广播；
在本实施例中， 小区重选参数至少包括公共小区重选参数， 还包括 UTRAN小区重选参 数或 GERAN小区重选参数。
进一步地， 公共小区重选参数为系统消息块 SIB3, 用于终端做同频、 异频、 异系统的 小区重选的公共参数的系统消息块；
UTRAN 小区重选参数为消息块系统 SIB6, 用于终端做 UTRAN异系统小区重选的包括 UTRAN频点和门限值等参数的系统消息块；
GERAN小区重选参数为系统消息块 SIB7, 用于终端做 GSM异系统小区重选的包括 GSM 频点和门限值等参数的系统消息块。
其中， SIB为网络侧周期性的进行下发， 终端读取时， 读取下一个周期下发的系统消息 块， 例如， 网络侧每隔时间 T下发一次， 当终端在时间 3T到 4T之间准备读取系统消息块 时， 则读取 4T时网络侧下发的系统消息块。
702、 小区寻呼终端， 通知终端小区重选参数发生变化；
703、 终端监听到小区重选参数发生变化， 读取公共小区重选参数、 GERAN小区重选参 数和 UTRAN小区重选参数；
需要说明的是， 由于本实施例所使用的终端为 LTE、 GSM/UTRAN单卡双待终端， 因此在 读取系统重选参数时， 需要读取系统消息块 SIB3、 SIB6 和 SIB7, 其中， 读取的数据包括 SIB3、 SIB6和 SIB7中规定的 LTE频点、 UTRAN频点和 GSM频点， 分别用于指示终端在 LTE 网络、 UTRAN网络和 GSM网络进行信号强度测量的频点， 以及 SIB3、 SIB6和 SIB7中对应的 LTE小区门限、 UTRAN小区门限和 GSM小区门限；
其中， LTE小区门限具体的为 CellReselectionServingFreqlnfo ( s-NonlntraSearch) 门限， 当终端在 LTE小区下在 LTE频点进行信号强度测量满足 LTE小区门限要求时， 允许 进行小区重选， LTE小区门限包含在公共小区重选参数即系统消息块 SIB3中； UTRAN小区门限具体的为 UTRAN小区对应的频点门限要求， 当终端在 UTRAN小区中在 UTRAN频点进行信号强度测量满足 UTRAN小区门限要求时， 网络侧允许终端切换到该 UTRAN 小区中， UTRAN小区限包含在 UTRAN小区重选参数即系统消息块 SIB6中；
GSM小区门限具体的为 GSM小区对应的频点门限要求，当终端在 GSM小区中在 GSM频点 进行信号强度测量满足 GSM小区门限要求时， 网络侧允许终端切换到该 GSM小区中， GSM小 区门限包含在 GERAN小区重选参数即系统消息块 SIB7中。
704、 终端在 LTE频点和 UTRAN频点上进行信号强度测量；
在本步骤中， 需要说明的是， 终端在 UTRAN频点上进行信号强度测量还包括： 判断当 前的 CS业务是驻留在 GSM小区还是 UTRAN小区， 以便确定对 PS业务进行重选的目标异系 统小区， 在本实施例中， 由于当前终端的 CS业务驻留在 UTRAN网络中， 因此， 终端将重选 的目标网络制式选定为 UTRAN网络， 因此只测量在 LTE频点和 UTRAN频点上的信号强度。
705、 判断终端在 LTE频点上测量得到的信号强度是否低于第一门限， 且终端在 UTRAN 频点上测量得到的信号强度高于第三门限， 如果是， 则执行步骤 706， 否则， 返回步骤 704; 在本实施例中， 第一门限具体的为 LTE小区门限， 第三门限具体的为 UTRAN小区门限； 或，
第一门限具体的为 LTE小区门限与预设的偏移量的差值， 第三门限具体的为 UTRAN小 区门限；
其中， 偏移量的预设方法与实施例 2中相同， 这里不再赘述。
需要说明的是， 在预设偏移量时， 偏移量的大小与终端准备重选到的目标网络无线接 入制式有关， 例如由于 UTRAN提供的扩频技术导致在 UTRAN网络和 GERAN网络处于相同载 干比的情况下， UTRAN却能提供高于 GERAN网络的 Qos， 所以对于相同 Qos要求的业务， 当 目标网络是 UTRAN时设置的偏移量可以比目标网络是 GERAN时要低，例如目标网络是 UTRAN 设置为 2dbm， 目标网络是 GERAN设置为 4dbm， 这样保证在 LTE网络中能保证业务 Qos要求 的前提下使终端迁移到 UTRAN网络中比迁移到 GERAN网络中要容易。
706、 将终端的 PS业务从 LTE小区重选到 UTRAN小区。 本发明实施例所提供的 PS连接态重选的方法， 使得处于连接态的可支持三种网络制式 且 CS业务驻留在 UTRAN网络中的终端， 在网络侧改变小区重选参数时， 通过接收网络侧发 送的小区重选参数， 分别在 LTE频点和 UTRAN频点测量信号强度， 当均满足第一门限和第 三门限的要求时， 进行小区的重选， 克服了传统终端中由于被设置为 LTE only模式时， 即 使 LTE信号质量很差的情况下也不能进行异系统小区重选的缺点， 可以给用户更好的业务 体验。 实施例 8
如图 8所示， 本发明实施例提供了一种 PS连接态重选的方法， 是在上述实施例的基础 之上改进而来。
在本实施例中， 以终端为 LTE， GSM/UTRAN单卡双待终端为例进行说明， 其中， 该终端 可支持 LTE、 GSM和 UTRAN三种网络制式， 在终端进行 PS业务态重选前， 终端的 PS业务驻 留在 LTE网络中， 并在 LTE网络中建立数据业务， 处于连接态， 当前 CS业务驻留在 GSM网 络中， 并且在终端读取了 SIB7后， PS业务进行重选前， CS业务驻留的网络的网络制式由 GSM变为 UTRAN。
一种 PS连接态重选的方法， 具体包括：
801、 当网络侧改变小区重选参数时， 在小区中进行广播；
在本实施例中， 小区重选参数至少包括公共小区重选参数， 还包括 UTRAN小区重选参 数和 /或 GERAN小区重选参数。
进一步地， 公共小区重选参数为系统消息块 SIB3, 用于终端做同频、 异频、 异系统的 小区重选的公共参数的系统消息块；
UTRAN 小区重选参数为消息块系统 SIB6, 用于终端做 UTRAN异系统小区重选的包括 UTRAN频点和门限值等参数的系统消息块；
GERAN小区重选参数为系统消息块 SIB7, 用于终端做 GSM异系统小区重选的包括 GSM 频点和门限值等参数的系统消息块。
其中， SIB为网络侧周期性的进行下发， 终端读取时， 读取下一个周期下发的系统消息 块， 例如， 网络侧每隔时间 T下发一次， 当终端在时间 3T到 4T之间准备读取系统消息块 时， 则读取 4T时网络侧下发的系统消息块。
802、 小区寻呼终端， 通知终端小区重选参数发生变化；
803、 终端监听到小区重选参数发生变化， 读取公共小区重选参数和 GERAN小区重选参 数。
需要说明的是， 在步骤 803之前， 还包括： 终端判断自身的 CS业务驻留在 GSM网络还 是 UTRAN网络中， 选择终端的 CS业务驻留的异系统小区作为 PS业务进行重选的目标异系 统小区。 由于在本实施例中， 终端的 CS业务当前驻留在 GSM网络中， 因此选择只读取公共 小区重选参数和 GERAN小区重选参数。
804、 终端将 CS业务驻留网络由 GSM网络改变为 UTRAN网络； 805、 终端读取 UTRAN小区重选参数；
806、 终端在 LTE频点和 UTRAN频点上进行信号强度测量；
807、 判断终端在 LTE频点上测量得到的信号强度是否低于第一门限， 且终端在 UTRAN 频点上测量得到的信号强度高于第三门限， 如果是， 则执行步骤 808， 否则， 返回步骤 806;
808、 将终端的 PS业务从 LTE小区重选到 UTRAN小区。 本发明实施例所提供的 PS连接态重选的方法， 使得处于连接态的可支持三种网络制式 的终端， 在网络侧改变小区重选参数且 CS业务驻留网络的制式类型发生改变时， 通过接收 网络侧发送的小区重选参数， 分别在 LTE频点和 UTRAN频点测量信号强度， 当均满足第一 门限和第三门限的要求时，进行小区的重选操作，克服了传统终端中由于被设置为 LTE only 模式时， 即使 LTE信号质量很差的情况下也不能进行异系统小区重选的缺点， 可以给用户 更好的业务体验。 实施例 9
如图 9所示， 本发明实施例提供了一种 PS连接态重选的方法， 是在上述实施例的基础 之上改进而来。
在本实施例中， 以终端为 LTE， GSM/UTRAN单卡双待终端为例进行说明， 其中， 该终端 可支持 LTE、 GSM和 UTRAN三种网络制式， 在终端进行 PS业务态重选前， 终端的 PS业务驻 留在 LTE网络中， 并在 LTE网络中建立数据业务， 处于连接态， 当前 CS业务驻留在 UTRAN 网络中， 并且在终端读取了 SIB6后， PS业务进行重选前， CS业务驻留的网络的网络制式 由 UTRAN变为 GSM。
901、 当网络侧改变小区重选参数时， 在小区中进行广播；
在本实施例中， 小区重选参数至少包括公共小区重选参数， 还包括 UTRAN小区重选参 数或 GERAN小区重选参数。
进一步地， 公共小区重选参数为系统消息块 SIB3, 用于终端做同频、 异频、 异系统的 小区重选的公共参数的系统消息块；
UTRAN 小区重选参数为消息块系统 SIB6, 用于终端做 UTRAN异系统小区重选的包括 UTRAN频点和门限值等参数的系统消息块；
GERAN小区重选参数为系统消息块 SIB7, 用于终端做 GSM异系统小区重选的包括 GSM 频点和门限值等参数的系统消息块。
其中， SIB为网络侧周期性的进行下发， 终端读取时， 读取下一个周期下发的系统消息 块， 例如， 网络侧每隔时间 T下发一次， 当终端在时间 3T到 4T之间准备读取系统消息块 时， 则读取 4T时网络侧下发的系统消息块。
902、 小区寻呼终端， 通知终端小区重选参数发生变化；
903、 终端监听到小区重选参数发生变化， 读取公共小区重选参数和 UTRAN小区重选参 数。
需要说明的是， 在步骤 903之前， 还包括： 终端判断自身的 CS业务驻留在 GSM网络还 是 UTRAN网络中， 选择终端的 CS业务驻留的异系统小区作为 PS业务进行重选的目标异系 统小区。 由于在本实施例中， 终端的 CS业务当前驻留在 UTRAN网络中， 因此选择只读取公 共小区重选参数和 UTRAN小区重选参数。
904、 终端将 CS业务驻留网络由 UTRAN网络改变为 GSM网络；
905、 终端读取 GERAN小区重选参数；
906、 终端在 LTE频点和 GSM频点上进行信号强度测量；
907、 判断终端在 LTE频点上测量得到的信号强度是否低于第一门限， 且终端在 GSM频 点上测量得到的信号强度高于第二门限， 如果是， 则执行步骤 908， 否则， 返回步骤 906 ;
908、 判断 GSM小区和自身是否支持 DTM， 如果是， 执行步骤 909， 如果不是， 执行步 骤 910;
909、 判断当前正在进行的 CS业务是否完成， 如果不是， 执行步骤 910， 如果是， 则进 行等待， 并返回判断当前正在进行的 CS业务是否完成， 直到当前正在进行的 CS业务完成 后再执行步骤 910;
910、 将终端的 PS业务从 LTE小区重选到 GSM小区。 本发明实施例所提供的 PS连接态重选的方法， 使得处于连接态的可支持三种网络制式 的终端， 在网络侧改变小区重选参数且 CS业务驻留网络的制式类型发生改变时， 通过接收 网络侧发送的小区重选参数， 分别在 LTE频点和 GSM频点测量信号强度， 当均满足第一门 限和第二门限的要求时， 进行小区的重选操作， 克服了传统终端中由于被设置为 LTE only 模式时， 即使 LTE信号质量很差的情况下也不能进行异系统小区重选操作的缺点， 可以给 用户更好的业务体验。 实施例 10
本发明实施例提供了一种 PS连接态重选的终端， 如图 10所示， 终端包括 LTE模块 101 和异系统模块 102 ; 其中， LTE模块 101包括：
系统消息读取单元 1011， 用于当小区系统消息发生改变或发生同系统内小区切换时， 读取网络侧下发的 SIB3, 并读取 SIB6和 /或 SIB7;
参数获取单元 1012， 用于根据 SIB3获取第一门限、 LTE频点， 根据 SIB6和 /或 SIB7 获取异系统重选门限、 异系统频点；
第一发送单元 1013， 用于将异系统重选门限、 异系统频点发送给异系统模块； 第一测量单元 1014， 用于在 LTE频点上进行信号强度测量；
第一判断单元 1015， 用于判断在 LTE频点上测量得到的信号强度是否低于第一门限。 异系统模块 102包括：
第二测量单元 1021，用于接收第一发送单元 1013发送的异系统重选门限、异系统频点， 并在异系统频点上分别进行信号强度测量；
第二判断单元 1022， 用于判断在异系统频点上测量得到的信号强度是否高于异系统重 选门限；
重选单元 1023， 用于在满足在 LTE频点上测量得到的信号强度低于第一门限且在异系 统频点上测量得到的信号强度高于异系统重选门限时， 启动小区重选过程， 将 PS业务重选 到对应的异系统小区中。 进一步地， SIB7中包括第二门限和全球移动通信系统 GSM频点；
相应地， 如图 11所示， 当异系统门限为第二门限， 异系统频点为 GSM频点时， 如图 11 所示， 异系统模块 102还包括：
第三判断单元 1024，用于在重选单元 1023将 PS业务重选到对应的异系统小区中之前， 判断终端和对应的异系统小区是否支持 DTM， 如果是， 则通知重选单元 1023将 PS业务重选 到对应的异系统小区中， 如果不是， 则等待当前终端正在进行的电路交换 CS业务完成后， 通知重选单元 1023将 PS业务重选到对应的异系统小区中。
进一步地， SIB6中包括第三门限和 UTRAN频点；
相应地， 异系统重选门限包括第二门限和 /或第三门限；
异系统频点包括 GSM频点和 /或 UTRAN频点。
进一步地， 如图 12所示， 异系统模块 102还包括：
第四判断单元 1025， 用于在系统消息读取单元 1011读取网络侧下发的 SIB3, 并读取 SIB6和 /或 SIB7之前，获取终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区还是 UTRAN小区， 以便终端确定将 PS业务切换到的目标异系统小区。 进一步地， 当终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区时， 第二测量 单元 1021， 具体的用于在 GSM频点上进行信号强度测量；
第二判断单元 1022，具体的用于判断在 GSM频点上测量得到的信号强度高于第二门限; 重选单元 1023， 具体的用于在满足在 LTE频点上测量得到的信号强度低于第一门限且 在 GSM频点上测量得到的信号强度高于二门限时， 接收 GSM小区发送的重选命令， 将 PS业 务重选到 GSM小区中；
相应地， 当终端当前正在进行的 CS业务驻留的异系统小区为 UTRAN小区时， 第二测量 单元 1021， 具体的用于在 UTRAN频点上进行信号强度测量；
第二判断单元 1022， 具体的用于判断在 UTRAN频点上测量得到的信号强度是否高于第 三门限；
重选单元 1023， 具体的用于在满足在 LTE频点上测量得到的信号强度低于第一门限且 在 UTRAN频点上测量得到的信号强度高于第三门限时， 接收 UTRAN小区发送的重选命令， 将 PS业务重选到 UTRAN小区中。
进一步地， 参数获取单元根据 SIB3获取第一门限， 具体包括：
读取 SIB3中的 LTE小区门限， 并将 LTE小区门限作为第一门限；
或，
读取 SIB3中的 LTE小区门限， 并将 LTE小区门限与预设的偏移量取差值， 得到第一门 限。
进一步地， 如图 13所示， LTE模块 101还包括：
偏移量获取单元 1016， 用于在参数获取单元得到第一门限之前， 根据终端当前正在进 行的 PS业务的服务质量要求和对应的异系统小区对偏移量进行预设。 本发明实施例所提供的 PS连接态重选的装置， 使得处于连接态的终端在网络侧改变小 区重选参数或在同系统内发生小区切换时， 读取网络侧下发的 SIB3, 并读取 SIB6 和 /或 SIB7, 并在 LTE频点和异系统频点测量信号强度， 当满足第一门限和异系统重选门限要求 时， 进行小区的重选操作， 克服了传统终端中由于被设置为 LTE only模式时， 即使 LTE信 号质量很差的情况下也不能进行异系统小区重选操作的缺点， 可以给用户更好的业务体验。 需要说明的是： 上述实施例提供的 PS连接态重选的装置， 仅以上述各功能模块的划分 进行举例说明， 实际应用中， 可以根据需要而将上述功能分配由不同的功能模块完成， 即 将 PS连接态重选的装置的内部结构划分成不同的功能模块， 以完成以上描述的全部或者部 分功能。 另外， 上述实施例提供的 PS连接态重选的装置与 PS连接态重选的方法实施例属 于同一构思， 其具体实现过程详见方法实施例， 这里不再赘述。 以上实施例提供的技术方案中的全部或部分内容可以通过软件编程实现， 其软件程序 存储在可读取的存储介质中， 存储介质例如： 计算机中的硬盘、 光盘或软盘。
以上所述仅为本发明的较佳实施例， 并不用以限制本发明， 凡在本发明的精神和原则 之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1、 一种分组交换 PS连接态重选的方法， 其特征在于， 所述方法包括：
当小区系统消息发生改变或发生同系统内小区切换时， 读取网络侧下发的第三系统消息 块 SIB3 , 并读取第六系统消息块 SIB6和 /或第七系统消息块 SIB7 ;
根据所述 SIB3获取第一门限、 长期演进 LTE频点， 根据所述 SIB6和 /或 SIB7获取异系 统重选门限、 异系统频点；
在所述 LTE频点及所述异系统频点上分别进行信号强度测量；
如果满足在所述 LTE频点上测量得到的信号强度低于所述第一门限且在所述异系统频点 上测量得到的信号强度高于所述异系统重选门限， 将 PS业务重选到对应的异系统小区。
2、 根据权利要求 1所述的方法， 其特征在于， 所述 SIB7中包括第二门限和全球移动通 信系统 GSM频点；
相应地， 当所述异系统门限为第二门限， 所述异系统频点为 GSM频点时， 所述将 PS业务 重选到对应的异系统小区之前， 所述方法还包括：
判断终端和所述对应的异系统小区是否支持双发双收 DTM;
如果是， 则将 PS业务重选到所述对应的异系统小区；
如果不是， 则等待当前所述终端正在进行的电路交换 CS业务完成后， 将 PS业务重选到 所述对应的异系统小区。
3、 根据权利要求 2所述的方法， 其特征在于， 所述 SIB6中包括第三门限和陆地无线接 入网 UTRAN频点；
相应地， 所述异系统重选门限包括第二门限和 /或第三门限；
所述异系统频点包括 GSM频点和 /或 UTRAN频点。
4、根据权利要求 1所述的方法，其特征在于，所述读取网络侧下发的 SIB3 , 并读取 SIB6 和 /或 SIB7之前， 所述方法还包括：
获取所述终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区还是 UTRAN小区，以 便所述终端确定将所述 PS业务切换到的目标异系统小区。
5、根据权利要求 4所述的方法， 其特征在于， 所述在所述 LTE频点及所述异系统频点上 分别进行信号强度测量， 如果满足在所述 LTE频点上测量得到的信号强度低于所述第一门限 且在所述异系统频点上测量得到的信号强度高于所述异系统重选门限，将 PS业务重选到所述 对应的异系统小区， 具体包括：
当所述终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区时，在所述 LTE频点及 所述 GSM频点上分别进行信号强度测量， 如果满足在所述 LTE频点上测量得到的信号强度低 于所述第一门限且在所述 GSM频点上测量得到的信号强度高于所述第二门限，将 PS业务重选 到 GSM小区；
或，
当所述终端当前正在进行的 CS业务驻留的异系统小区为 UTRAN小区时，在所述 LTE频点 及所述 UTRAN频点上分别进行信号强度测量， 如果满足在所述 LTE频点上测量得到的信号强 度低于所述第一门限且在所述 UTRAN频点上测量得到的信号强度高于所述第三门限，将 PS业 务重选到 UTRAN小区。
6、 根据权利要求 1所述的方法， 其特征在于， 所述根据所述 SIB3获取第一门限， 具体 包括：
读取所述 SIB3中的 LTE小区门限， 并将所述 LTE小区门限作为所述第一门限； 或，
读取所述 SIB3中的 LTE小区门限， 并将所述 LTE小区门限与预设的偏移量取差值， 得到 所述第一门限。
7、 根据权利要求 6所述的方法， 其特征在于， 所述得到所述第一门限之前， 所述方法还 包括：
根据所述终端当前正在进行的 PS 业务的服务质量要求和所述对应的异系统小区对所述 偏移量进行预设。
8、 一种 PS连接态重选的终端， 其特征在于， 所述装置包括： LTE模块和异系统模块； 其中， 所述 LTE模块包括：
系统消息读取单元， 用于当小区系统消息发生改变或发生同系统内小区切换时， 读取网 络侧下发的 SIB3, 并读取 SIB6和 /或 SIB7;
参数获取单元， 用于根据所述 SIB3获取第一门限、 LTE频点， 根据所述 SIB6和 /或 SIB7 获取异系统重选门限、 异系统频点；
第一发送单元， 用于将所述异系统重选门限、 异系统频点发送给所述异系统模块； 第一测量单元， 用于在所述 LTE频点上进行信号强度测量；
第一判断单元，用于判断在所述 LTE频点上测量得到的信号强度是否低于所述第一门限； 所述异系统模块包括：
第二测量单元， 用于接收所述第一发送单元发送的所述异系统重选门限、 异系统频点， 并在所述异系统频点上分别进行信号强度测量；
第二判断单元， 用于判断在所述异系统频点上测量得到的信号强度是否高于所述异系统 重选门限；
重选单元， 用于在满足在所述 LTE频点上测量得到的信号强度低于所述第一门限且在所 述异系统频点上测量得到的信号强度高于所述异系统重选门限时， 接收对应的异系统小区发 送的重选命令， 将 PS业务重选到所述对应的异系统小区中。
9、 根据权利要求 8所述的终端， 其特征在于， 所述 SIB7中包括第二门限和 GSM频点； 相应地， 当所述异系统门限为第二门限， 所述异系统频点为 GSM频点时， 所述异系统模 块还包括：
第三判断单元， 用于在所述重选单元将 PS业务重选到所述对应的异系统小区中之前， 判 断终端和所述对应的异系统小区是否支持 DTM， 如果是， 则通知所述重选单元将 PS业务重选 到所述对应的异系统小区中， 如果不是， 则等待当前所述终端正在进行的电路交换 CS业务完 成后， 通知所述重选单元将 PS业务重选到所述对应的异系统小区中。
10、根据权利要求 9所述的终端，其特征在于，所述 SIB6中包括第三门限和 UTRAN频点； 相应地， 所述异系统重选门限包括第二门限和 /或第三门限；
所述异系统频点包括 GSM频点和 /或 UTRAN频点。
11、 根据权利要求 8所述的终端， 其特征在于， 所述异系统模块还包括：
第四判断单元， 用于在所述系统消息读取单元读取网络侧下发的 SIB3, 并读取 SIB6和 / 或 SIB7之前，获取所述终端当前正在进行的 CS业务驻留的异系统小区为 GSM小区还是 UTRAN 小区， 以便所述终端确定将所述 PS业务切换到的目标异系统小区。
12、 根据权利要求 11所述的终端， 其特征在于， 当所述终端当前正在进行的 CS业务驻 留的异系统小区为 GSM小区时， 所述第二测量单元， 具体的用于在所述 GSM频点上进行信号 强度测量；
所述第二判断单元， 具体的用于判断在所述 GSM频点上测量得到的信号强度高于所述第 二门限；
所述重选单元， 具体的用于在满足在所述 LTE频点上测量得到的信号强度低于所述第一 门限且在所述 GSM频点上测量得到的信号强度高于所述二门限时， 接收 GSM小区发送的重选 命令， 将 PS业务重选到所述 GSM小区中；
相应地， 当所述终端当前正在进行的 CS业务驻留的异系统小区为 UTRAN小区时， 所述第 二测量单元， 具体的用于在所述 UTRAN频点上进行信号强度测量；
所述第二判断单元， 具体的用于判断在所述 UTRAN频点上测量得到的信号强度是否高于 所述第三门限；
所述重选单元， 具体的用于在满足在所述 LTE频点上测量得到的信号强度低于所述第一 门限且在所述 UTRAN频点上测量得到的信号强度高于所述第三门限时， 启动小区重选过程， 将 PS业务重选到所述 UTRAN小区中。
13、根据权利要求 8所述的终端， 其特征在于， 所述参数获取单元根据 SIB3获取第一门 限， 具体包括：
读取所述 SIB3中的 LTE小区门限， 并将所述 LTE小区门限作为所述第一门限； 或，
读取所述 SIB3中的 LTE小区门限， 并将所述 LTE小区门限与预设的偏移量取差值， 得到 所述第一门限。
14、 根据权利要求 13所述的终端， 其特征在于， 所述 LTE模块还包括：
偏移量获取单元， 用于在所述参数获取单元得到所述第一门限之前， 根据所述终端当前 正在进行的 PS业务的服务质量要求和所述对应的异系统小区对所述偏移量进行预设。
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