WO2015117324A1 - 网络接入方法及ue和计算机存储介质 - Google Patents

网络接入方法及ue和计算机存储介质 Download PDF

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Publication number
WO2015117324A1
WO2015117324A1 PCT/CN2014/086856 CN2014086856W WO2015117324A1 WO 2015117324 A1 WO2015117324 A1 WO 2015117324A1 CN 2014086856 W CN2014086856 W CN 2014086856W WO 2015117324 A1 WO2015117324 A1 WO 2015117324A1
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Prior art keywords
value
cell
counter
standard network
network cell
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PCT/CN2014/086856
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English (en)
French (fr)
Inventor
杨惠
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中兴通讯股份有限公司
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Priority to EP14881498.1A priority Critical patent/EP3174339B1/en
Priority to US15/328,071 priority patent/US20180132157A1/en
Publication of WO2015117324A1 publication Critical patent/WO2015117324A1/zh

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    • 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
    • H04W36/305—Handover due to radio link failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a network access method, a UE (User Equipment), and a computer storage medium, which prevent user service re-selection and prevent user service from being unavailable.
  • a network access method a UE (User Equipment)
  • a computer storage medium which prevent user service re-selection and prevent user service from being unavailable.
  • the packet core network mainly includes three logical entities: an MME, a Serving Gateway (S-GW), and a Packet Data Network Gateway (PGW).
  • the radio access network of the LTE system is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the user equipment can also pass the GSM EDGE Radio Access Network (GERAN).
  • GERAN GSM EDGE Radio Access Network
  • UTRAN Universal Terrestrial Radio Access Network
  • the LTE system includes an E-UTRAN network.
  • the core network of the circuit domain mainly includes the Mobile Switching Center (MSC).
  • MSC Mobile Switching Center
  • an SGs interface is introduced between the MME and the MSC.
  • EMM EPS Mobility Management
  • the UE first initiates an EPS Mobility Management (EMM) joint process on the E-UTRAN network.
  • EMM EPS Mobility Management
  • the UE simultaneously registers the EPS service and the non-EPS service.
  • the MME and the MSC create an SGs association for the UE.
  • the UE makes a voice call or an SMS message, This can be done through SGS association.
  • the failure cause of the TAU process is #16 (MSC temporarily not reachable) or #17 (Network failure) or #22 (Congestion)
  • a counter of the TAU process attempt is internally started, and if the counter is less than 5, then A T3411 timer timer is started. After the timer expires, the TAU process is re-initiated and the counter is incremented by 1. If the counter is equal to 5, the 3G or 2G cell must be selected for camping.
  • the 3GPP protocol does not explicitly define the actions after camping on a 3G or 2G cell.
  • the UE still performs cell reselection operation according to the LTE cell list and the cell reselection principle in the SIB19 message, and reselects to the LTE cell. Due to the network side problem, the TAU The process may fail again. In this way, the UE will be in a no-service state for a long time, resulting in the user service being unavailable and the user experience being very poor.
  • embodiments of the present invention are directed to a network access method and a UE that prevent user services from being unavailable due to frequent cell reselection.
  • a first aspect of the embodiments of the present invention provides a network access method, including:
  • the UE When the user terminal UE performs reselection from the first standard network cell to the second standard network cell In operation, the UE initiates a tracking area update TAU procedure to the second standard network cell;
  • the UE selects to access the first standard network cell
  • the UE After the time when the value of the second counter is multiplied by the value of the second timer, if the cell reselection operation condition is satisfied, the UE performs the reselection operation from the first standard network cell to the second standard network cell again.
  • the method further includes:
  • the UE After accessing the first standard network cell, the UE receives a system message block SIB19 message, where the SIB19 message includes a cell reselection message;
  • the UE measures the signal quality of the second standard network cell according to the cell reselection message
  • the UE When the signal quality of the second standard network cell is greater than the measurement threshold, the UE performs a reselection operation from the first standard network cell to the second standard network cell.
  • the method further comprises:
  • the value of the second counter is reset.
  • the value of the second timer is a set, and includes at least a first set duration and a second set duration, where the first set duration is less than the second set duration;
  • the value of the second timer takes the first set duration
  • the value of the second timer takes the second set duration.
  • the step of the UE selecting to access the first standard network cell includes:
  • the first timer is started
  • the UE re-initiates the TAU process; and adds the value of the first counter to the second preset value, and repeats the previous step.
  • a second aspect of the embodiments of the present invention provides a UE that accesses a network, including:
  • An initiating module configured to: when the UE performs a reselection operation from the first standard network cell to the second standard network cell, initiate a tracking area update TAU procedure to the second standard network cell;
  • An access module configured to: when the TAU process fails, and the number of initiations of the TAU process reaches a threshold, selecting to access the first standard network cell;
  • a calculation module configured to add a value of the activated second counter to a first preset value, where the second counter is configured to record a number of times the number of initiations of the TAU process reaches a threshold value;
  • Reselecting the operation module configured to, after the time when the value of the second counter is multiplied by the value of the second timer, if the cell reselection operation condition is met, the UE performs the network from the first standard network to the second system again Cell reselection operation.
  • the UE further includes:
  • a receiving module configured to receive a system message block SIB19 message after accessing the first standard network cell, where the SIB19 message includes a cell reselection message;
  • a measuring module configured to measure a signal quality of the first standard network cell according to the cell reselection message
  • the reselection operation module is further configured to perform a reselection operation from the first standard network cell to the second standard network cell when the signal quality of the first standard network cell is greater than the measurement threshold.
  • the UE further includes:
  • the reset module is configured to reset the value of the second counter after the UE initiates the TAU process successfully.
  • the value of the second timer is a set, and includes at least a first set duration and a second set duration, where the first set duration is less than the second set duration;
  • the value of the second timer takes the first set duration
  • the value of the second timer takes the second set duration.
  • the UE further includes:
  • a counter startup module configured to start a first counter, the value of the first counter being equal to the number of initiations of the TAU process;
  • a timer starting module configured to start the first timer when the TAU process fails, and the value of the first counter is less than a threshold
  • the initiating module is further configured to: when the first timer expires, re-initiate the TAU process; and the computing module adds the value of the first counter to a second preset value.
  • a third aspect of the embodiments of the present invention provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are configured to execute at least one of the methods of the first aspect of the present embodiment.
  • the network access method and the UE proposed by the embodiment of the present invention can enable the UE to camp on the previous standard network cell (such as 3G) for a period of time after the TAU process fails by introducing the second counter and the second timer. Or the user service is performed by the 2G cell, and then the TAU process is performed in the second-standard cell (such as the 4G cell), so that the UE is not available due to the failure of the TAU process, causing the UE to be unavailable for a long time.
  • the previous standard network cell such as 3G
  • the user service is performed by the 2G cell, and then the TAU process is performed in the second-standard cell (such as the 4G cell), so that the UE is not available due to the failure of the TAU process, causing the UE to be unavailable for a long time.
  • FIG. 1 is a schematic flowchart of a first network access method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a second network access method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a third network access method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a fourth network access method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of a fifth network access method according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a UE of a first access network according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a second access network UE according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a UE of a third access network according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a fourth access network UE according to an embodiment of the present invention.
  • the method of the embodiment of the present invention includes: when the TAU process fails to select to access the first standard network cell, the UE starts a second timer, where the second counter is used to record the number of times the initiation sequence A1 of the TAU process reaches the threshold value; After the A2*T2 time, if the cell reselection operation condition is met, the UE performs the reselection operation from the first standard network cell to the second standard network cell again, thereby ensuring that the UE can be in the first standard network for a period of time.
  • the cell camps on and performs user service, even if the first-standard network cell is in a weak signal, avoiding frequent cell reselection and causing user service unavailability.
  • an embodiment of the present invention provides a network access method, including:
  • Step S101 When the UE performs a reselection operation from the first standard network cell to the second standard network cell, the UE initiates a TAU process to the second standard network cell.
  • the first standard network is a 3G network (using a UMTS network as an example), and the second standard network is 4G.
  • the LTE network is used as an example.
  • the 4G ⁇ 3G network of the UE is in the same coverage.
  • the UE is first in the UMTS network.
  • the system receives the SIB (system information block) 19 message.
  • the SIB19 message is received.
  • the cell reselection information such as the frequency and priority of the LTE cell is included.
  • the UE measures the signal quality of the LTE cell according to the cell reselection information in the SIB19. If the signal quality of the LTE cell is greater than the measurement threshold, the cell reselection operation occurs, by UMTS. The cell is reselected to the LTE cell. This process is clearly defined in 3GPP 24.301 and will not be described again.
  • a Tracking area updating procedure is performed to register in the LTE cell.
  • Step S102 when the TAU process fails, and the number of initiations A1 of the TAU process reaches the threshold, the UE selects to access the first standard network cell;
  • the TAU process may not succeed due to network network error or the like.
  • the TAU process fails, the TAU process is re-initiated.
  • the UE selects to access the first-standard network cell.
  • Step S103 the value A2 of the activated second counter is incremented by one, and the second counter is used to record the number of times the number of initiations A1 of the TAU process reaches the threshold value; wherein the value of the second counter is added each time
  • the value may be a set value (this embodiment is defined as a first preset value), and the embodiment is exemplified by adding an arbitrary integer, for example 1, but not limited to adding 1. For example, it can be 2, 3 and so on.
  • Step S104 after the A2*T2 time, if the cell reselection operation condition is met, the UE performs the reselection operation from the first standard network cell to the second standard network cell again, where the T2 is the second timer. Value; return to step S101 until the TAU process is successfully initiated.
  • a second counter and a second timer are added to the UE, and the value of the second counter is added.
  • the value of the second timer is T2.
  • the UE After the A2*T2 time, if the cell reselection operation condition is met, the UE performs the reselection operation from the first standard network cell to the second standard network cell again.
  • the UE can enable the UE to perform user services in the previous standard network cell (such as a 3G or 2G cell) for a period of time after the TAU process fails. Then, the TAU process is attempted in the second-standard cell (such as the 4G cell), which avoids the problem that the UE is not available due to the failure of the TAU process, causing the UE to be unavailable for a long time.
  • the previous standard network cell such as a 3G or 2G cell
  • the second-standard cell such as the 4G cell
  • another embodiment of the present invention provides a network access method.
  • the method further includes:
  • Step S105 After accessing the first standard network cell, the UE receives the SIB19 message, where the SIB19 message includes a cell reselection message.
  • Step S106 The UE measures the signal quality of the second standard network cell according to the cell reselection message.
  • Step S107 When the signal quality of the second standard network cell is greater than the measurement threshold, the UE performs a reselection operation from the first standard network cell to the second standard network cell.
  • the method further includes:
  • Step S108 starting a first counter, the value of the first counter is equal to the number of initiations A1 of the TAU process;
  • Step S109 when the TAU process fails, and the value A1 of the first counter is less than the threshold, the first timer is started;
  • Step S110 if the first timer expires, the UE re-initiates the TAU process; The value A1 of the first counter is incremented by 1, and the flow returns to step S109 until the value A1 of the first counter reaches the threshold value.
  • the embodiment further includes a scheme for the UE to perform a reselection operation of the first standard network cell to the second standard network cell, and after the TAU process fails, the UE selects the connection.
  • the processing scheme before entering the first standard network cell.
  • the target networks of other standards are similar.
  • the 4G/3G network in the same location of the UE is the same as the coverage.
  • the UMTS network is first received.
  • the SIB19 message is received in the network.
  • the message includes the cell reselection information such as the frequency and priority of the LTE cell.
  • the UE measures the signal quality of the LTE cell according to the cell reselection information in the SIB19. If the signal quality of the LTE cell is greater than the measurement threshold, the cell reselection operation occurs, by UMTS.
  • the cell is reselected to the LTE cell, and the process is clearly defined in 3GPP 24.301 and will not be described again.
  • a Tracking area updating procedure is performed to register in the LTE cell.
  • the UE receives the TRACKING AREA UPDATE ACCEPT message, and the message may include one of the following EMM CAUSEs:
  • the UE internally generates a TAU attempt counter according to the 3GPP regulations, which is referred to herein as the first counter A1. If the value of A1 is less than the set threshold (for example, the threshold value is 5), a T3411 timer is started. (The first timer in this embodiment) T1, if the first timer T1 times out, the UE will re-initiate the TAU procedure; if the value of A1 is equal to 5, the UE will select UMTS as the access technology to access the network.
  • the set threshold for example, the threshold value is 5
  • this embodiment A second counter A2 and a second timer T2 are added. It is assumed here that the value of the second timer T2 is 10 min.
  • the second counter A2 records the number of times the first counter A1 is equal to five. That is to say, if the value of A1 is equal to 5, then the UE will select UMTS as the access technology, and the value of A2 will be increased by 1. Of course, in this embodiment, the value of the second counter is increased by one.
  • the value added by the value A1 of the second counter may be a set value (this embodiment is defined as the second preset).
  • the value is exemplified by adding an arbitrary integer, as in the foregoing 1, but is not limited to adding 1, for example, it may be 2, 3 or the like.
  • the UE After the UE selects UMTS as the access technology to access the network, at least the A2*T2 time is required to perform the LTE cell reselection process again. Then, during the A2*T2 period, the UE can continue to use the UMTS. User business.
  • the UE can enable the UE to perform user services in the previous standard network cell (such as a 3G or 2G cell) for a period of time after the TAU process fails. Then, the TAU process is attempted in the second-standard cell (such as the 4G cell), which avoids the problem that the UE is not available due to the failure of the TAU process, causing the UE to be unavailable for a long time.
  • the previous standard network cell such as a 3G or 2G cell
  • the second-standard cell such as the 4G cell
  • another embodiment of the present invention provides a network access method.
  • the method further includes:
  • Step S111 after the UE initiates the TAU process successfully, resetting the value A2 of the second counter.
  • the embodiment further includes a solution for resetting the value A2 of the second counter after the UE initiates the TAU process successfully.
  • the value A2 of the second counter is reset after the UE can successfully perform the TAU procedure, that is to say after being able to successfully register to the 4G cell.
  • the value A2 of the second counter is reset to facilitate the next cell reselection operation.
  • the value T2 of the second timer may have multiple combinations of values, such as The first set duration and the second set duration are included, and the first set duration is less than the second set duration.
  • the value T2 of the second timer takes a first set duration; when the value A2 of the first counter is greater than or equal to the first set value, The value T2 of the second timer is taken as the second set duration.
  • the value T2 of the second timer may be a set of values ⁇ 10min, 20min ⁇ . If the value of the second counter A2 is less than 5, then after the UE selects UMTS as the access technology to access the network, it must wait at least 10 minutes. Time, the cell reselection process of LTE can be performed again; when the value of the second counter A2 is greater than or equal to 5, then after the UE selects UMTS as the access technology to access the network, it must wait at least 100 minutes for such a long time. The cell reselection process of LTE is performed.
  • the foregoing process can ensure that the UE can camp on the UMTS cell and perform user services for a period of time. Even if the UMTS cell is in a weak signal, the frequent cell reselection is avoided, and the user service unavailable condition occurs, and the user is better. Experience.
  • Example 1 (T2 is a fixed value of 10min, as shown in Figure 4)
  • the program includes the following steps:
  • step 1 the terminal camps on the 3G cell.
  • Step 2 In the current scenario, the signal of the 3G cell becomes weak, and the signal of the 4G cell becomes strong.
  • Step 3 If the criteria for cell reselection are met, proceed to step four; otherwise, proceed to step two.
  • step 4 the criteria for cell reselection are met, and the UE reselects to the 4G cell.
  • Step 5 The UE initiates a TAU process, and performs registration on the 4G cell, and the network side sends a TRACKING AREA UPDATE ACCEPT message, and the message may include the following EMM.
  • Step 6 The UE internally starts a counter Counter A1, adds 1 to determine that the value of A1 is less than 5, then proceeds to step 5; if the value of A1 is equal to 5, continues to step 7;
  • Step 7 The UE selects the 3G cell and camps, internally counters Counter A2, plus 1; at the same time, there is a Timer internally, which has a preset value; the UE needs to reside at least 3G cells for A2*Timer for such a long time;
  • Step 8 If the A2*Timer times out, the cell reselection operation may be performed; otherwise, the camping continues in the 3G cell.
  • Example 2 (T2 is a set of values ⁇ 10min, 20min ⁇ , as shown in Figure 5)
  • step 1 the terminal camps on the 3G cell.
  • Step 2 In the current scenario, the signal of the 3G cell becomes weak, and the signal of the 4G cell becomes strong.
  • Step 3 If the criteria for cell reselection are met, proceed to step four; otherwise, proceed to step two.
  • step 4 the criteria for cell reselection are met, and the UE reselects to the 4G cell.
  • Step 5 The UE initiates a TAU process, and performs registration on the 4G cell, and the network side sends a TRACKING AREA UPDATE ACCEPT message, and the message may include one of the following EMM CAUSEs:
  • Step 6 The UE internally starts a counter Counter A1, adds 1 to determine that the value of A1 is less than 5, then proceeds to step 5; if the value of A1 is equal to 5, continues to step 7;
  • Step 7 The UE selects the 3G cell and camps, internally increments a counter Counter A2, adds 1; at the same time, there is a timer Timer internally, which has a preset value set; according to whether the value of A2 is less than 5, select from the set The value of the Timer, the UE needs to reside at least in the 3G cell A2*Timer Such a long time;
  • Step 8 If the A2*Timer times out, the cell reselection operation may be performed; otherwise, the camping continues in the 3G cell.
  • the network access method and the UE in the embodiment of the present invention can enable the UE to camp on the previous standard network cell (such as a 3G or 2G cell) for a period of time after the TAU process fails by introducing the second counter and the second timer.
  • the second-standard cell such as the 4G cell
  • the UE includes: an initiating module 201, an access module 202, a computing module 203, and a reselection operation module 204, where:
  • the initiating module 201 is configured to initiate a TAU process to the second standard network cell when the UE performs a reselection operation from the first standard network cell to the second standard network cell;
  • the access module 202 is configured to select to access the first standard network cell when the TAU process fails, and the number of initiations A1 of the TAU process reaches the threshold.
  • the calculation module 203 is configured to increase the value A2 of the activated second counter by one, and the second counter is configured to record the number of times the initiation number A1 of the TAU process reaches the threshold value; wherein the value of the second counter is A2
  • the value added by the second time may be a set value (this embodiment is defined as the first preset value), and the embodiment is exemplified by adding an arbitrary integer, for example, 1, but not limited to adding 1. For example, it can be 2, 3 and so on.
  • the reselection operation module 204 is configured to perform, after the A2*T2 time, if the cell reselection operation condition is met, the UE performs the reselection operation from the first standard network cell to the second standard network cell again, where the T2 is The value of the second timer; this loop.
  • the 4G/3G network where the UE is located is covered by the same, and the UE first In the UMTS network, the SIB19 message is received in the network, and the SIB19 message includes cell reselection information such as the frequency and priority of the LTE cell.
  • the UE measures the signal quality of the LTE cell according to the cell reselection information in the SIB19. If the signal quality of the LTE cell is greater than the measurement threshold, the cell reselection operation occurs, by UMTS. The cell is reselected to the LTE cell. This process is clearly defined in 3GPP 24.301 and will not be described again.
  • a Tracking area updating procedure is performed to register in the LTE cell.
  • the TAU process may not succeed due to network network error or the like.
  • the TAU process fails, the TAU process is re-initiated.
  • the UE selects to access the first-standard network cell.
  • a second counter and a second timer are added to the UE.
  • the value of the second counter is A2, and the value of the second timer is T2.
  • the second counter is started.
  • the second counter is configured to record the number of times the number of initiations A1 of the TAU process reaches the threshold.
  • the UE After the A2*T2 time, if the cell reselection operation condition is met, the UE performs the reselection operation from the first standard network cell to the second standard network cell again.
  • the UE can enable the UE to perform user services in the previous standard network cell (such as a 3G or 2G cell) for a period of time after the TAU process fails. Then, the TAU process is attempted in the second-standard cell (such as the 4G cell), which avoids the problem that the UE is not available due to the failure of the TAU process, causing the UE to be unavailable for a long time.
  • the previous standard network cell such as a 3G or 2G cell
  • the second-standard cell such as the 4G cell
  • another embodiment of the present invention provides a UE accessing a network, as shown in FIG. 6 above. Based on the illustrated embodiment, it also includes:
  • the receiving module 205 is configured to: after accessing the first standard network cell, receive an SIB19 message, where the SIB19 message includes a cell reselection message;
  • the measuring module 206 is configured to measure the signal quality of the second standard network cell according to the cell reselection message
  • the reselection operation module 204 is further configured to perform a reselection operation from the first standard network cell to the second standard network cell when the signal quality of the second standard network cell is greater than the measurement threshold.
  • the embodiment further includes a scheme for the UE to perform a reselection operation of the first standard network cell to the second standard network cell, and after the TAU process fails, the UE selects the connection.
  • the processing scheme before entering the first standard network cell.
  • the target networks of other standards are similar.
  • the 4G/3G network in the same location of the UE is the same as the coverage.
  • the UMTS network is first received.
  • the SIB19 message is received in the network.
  • the message includes the cell reselection information such as the frequency and priority of the LTE cell.
  • the UE measures the signal quality of the LTE cell according to the cell reselection information in the SIB19. If the signal quality of the LTE cell is greater than the measurement threshold, the cell reselection operation occurs, by UMTS.
  • the cell is reselected to the LTE cell, and the process is clearly defined in 3GPP 24.301 and will not be described again.
  • a Tracking area updating procedure is performed to register in the LTE cell.
  • the UE receives the TRACKING AREA UPDATE ACCEPT message, and the message may include one of the following EMM CAUSEs:
  • the UE will internally start a TAU attempt counter according to the 3GPP regulations. This is called the first meter.
  • the timer A1 if the value of A1 is less than the set threshold (for example, the threshold value is 5), then a timer of T3411 (the first timer in this embodiment) T1 is started, if the first timing If the value of A1 is equal to 5, the UE selects UMTS as the access technology and accesses the network.
  • the present embodiment adds a second counter A2 and a second timer T2. It is assumed here that the value of the second timer T2 is 10 min.
  • the second counter A2 records the number of times the first counter A1 is equal to five. That is to say, if the value of A1 is equal to 5, then the UE will select UMTS as the access technology, and the value of A2 will be increased by 1. Of course, in this embodiment, the value of the second counter is increased by one.
  • the value added by the value A1 of the second counter may be a set value (this embodiment is defined as the second preset).
  • the value is exemplified by adding an arbitrary integer, as in the foregoing 1, but is not limited to adding 1, for example, it may be 2, 3 or the like.
  • the UE After the UE selects UMTS as the access technology to access the network, at least the A2*T2 time is required to perform the LTE cell reselection process again. Then, during the A2*T2 period, the UE can continue to use the UMTS. User business.
  • the UE can enable the UE to perform user services in the previous standard network cell (such as a 3G or 2G cell) for a period of time after the TAU process fails. Then, the TAU process is attempted in the second-standard cell (such as the 4G cell), which avoids the problem that the UE is not available due to the failure of the TAU process, causing the UE to be unavailable for a long time.
  • the previous standard network cell such as a 3G or 2G cell
  • the second-standard cell such as the 4G cell
  • FIG. 8 another embodiment of the present invention provides a UE that accesses a network. Based on the foregoing embodiment shown in FIG. 7 , the method further includes:
  • the reset module 207 is configured to reset the value A2 of the second counter after the UE initiates the TAU process successfully.
  • the embodiment further includes a solution for resetting the value A2 of the second counter after the UE initiates the TAU process successfully.
  • the value A2 of the second counter is reset after the UE can successfully perform the TAU procedure, that is to say after being able to successfully register to the 4G cell.
  • the value A2 of the second counter is reset to facilitate the next cell reselection operation.
  • the value T2 of the second timer may have multiple combinations of values, such as including a first set duration and a second set duration, where the first set duration is less than the second set duration .
  • the value T2 of the second timer takes a first set duration; when the value A2 of the first counter is greater than or equal to the first set value, The value T2 of the second timer is taken as the second set duration.
  • the value T2 of the second timer may be a set of values ⁇ 10min, 20min ⁇ . If the value of the second counter A2 is less than 5, then after the UE selects UMTS as the access technology to access the network, it must wait at least 10 minutes. Time, the cell reselection process of LTE can be performed again; when the value of the second counter A2 is greater than or equal to 5, then after the UE selects UMTS as the access technology to access the network, it must wait at least 100 minutes for such a long time. The cell reselection process of LTE is performed.
  • the foregoing process can ensure that the UE can camp on the UMTS cell and perform user services for a period of time. Even if the UMTS cell is in a weak signal, the frequent cell reselection is avoided, and the user service unavailable condition occurs, and the user is better. Experience.
  • Example 1 (T2 is a fixed value of 10min, as shown in Figure 4)
  • the program includes the following steps:
  • step 1 the terminal camps on the 3G cell.
  • Step 2 In the current scenario, the signal of the 3G cell becomes weak, and the signal of the 4G cell becomes strong.
  • Step 3 If the criteria for cell reselection are met, proceed to step four; otherwise, proceed to step two.
  • step 4 the criteria for cell reselection are met, and the UE reselects to the 4G cell.
  • Step 5 The UE initiates a TAU process, and performs registration on the 4G cell, and the network side sends a TRACKING AREA UPDATE ACCEPT message, and the message may include one of the following EMM CAUSEs:
  • Step 6 The UE internally starts a counter Counter A1, adds 1 to determine that the value of A1 is less than 5, then proceeds to step 5; if the value of A1 is equal to 5, continues to step 7;
  • Step 7 The UE selects the 3G cell and camps, internally counters Counter A2, plus 1; at the same time, there is a Timer internally, which has a preset value; the UE needs to reside at least 3G cells for A2*Timer for such a long time;
  • Step 8 If the A2*Timer times out, the cell reselection operation may be performed; otherwise, the camping continues in the 3G cell.
  • Example 2 (T2 is a set of values ⁇ 10min, 20min ⁇ , as shown in Figure 5)
  • step 1 the terminal camps on the 3G cell.
  • Step 2 In the current scenario, the signal of the 3G cell becomes weak, and the signal of the 4G cell becomes strong.
  • Step 3 If the criteria for cell reselection are met, proceed to step four; otherwise, proceed to step two.
  • step 4 the criteria for cell reselection are met, and the UE reselects to the 4G cell.
  • Step 5 The UE initiates a TAU process, and performs registration on the 4G cell, and the network side sends a TRACKING AREA UPDATE ACCEPT message, and the message may include one of the following EMM CAUSEs:
  • Step 6 The UE internally starts a counter Counter A1, adds 1 to determine that the value of A1 is less than 5, then proceeds to step 5; if the value of A1 is equal to 5, continues to step 7;
  • Step 7 The UE selects the 3G cell and camps, internally increments a counter Counter A2, adds 1; at the same time, there is a timer Timer internally, which has a preset value set; according to whether the value of A2 is less than 5, select from the set The value of the Timer, the UE needs to reside at least 3G cells for A2*Timer for such a long time;
  • Step 8 If the A2*Timer times out, the cell reselection operation may be performed; otherwise, the camping continues in the 3G cell.
  • the network access method and the UE in the embodiment of the present invention can enable the UE to camp on the previous standard network cell (such as a 3G or 2G cell) for a period of time after the TAU process fails by introducing the second counter and the second timer.
  • the second-standard cell such as the 4G cell
  • the embodiment of the present invention further describes a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are configured to perform at least one of the methods in the embodiments of the present invention; At least one of the methods described in FIG. 1 to FIG. 5; the computing and storage medium may specifically be a storage medium such as a USB flash drive, an optical disk or a magnetic tape, preferably a non-transitory storage medium.
  • the computing and storage medium may specifically be a storage medium such as a USB flash drive, an optical disk or a magnetic tape, preferably a non-transitory storage medium.
  • the embodiment further provides a UE accessing a network, where the UE includes a processor 302, a storage medium 304, and at least one external communication interface 301; the processor 302, the storage medium 304, and external communication.
  • the interfaces 301 are all connected by a bus 303.
  • the processor 302 can be a processing component such as a microprocessor, a central processing unit, a digital signal processor, or a programmable logic array. Computer executable instructions are stored in the storage medium;
  • the processor reads and runs computer executable instructions in the storage medium 304, At least one of the methods of the first aspect of the embodiments of the present invention can be performed.

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Abstract

本发明涉及一种网络接入方法及UE，其方法包括：当UE进行从第一制式网络小区至第二制式网络小区的重选操作时，UE向第二制式网络小区发起TAU过程；当TAU过程失败，且TAU过程的发起次数达到门限值时，UE选择接入第一制式网络小区；将启动的第二计数器的值加预设值，在第二计数器的值与第二计时器的值乘积的时间之后，若满足小区重选操作条件，则UE再次进行从第一制式网络小区至第二制式网络小区的重选操作。本发明可使UE在TAU过程失败后，能在一段时间驻留在前一制式网络小区进行用户业务，避免了UE由于TAU过程失败导致频繁小区重选，造成UE长时间处于无服务状态导致用户业务不可用的问题。本发明还同时公开了一种计算机存储介质。

Description

网络接入方法及UE和计算机存储介质 技术领域
本发明涉及通信技术领域，尤其涉及一种防止频繁小区重选而导致用户业务不可用的网络接入方法及UE(User Equipment，用户终端)和计算机存储介质。
背景技术
随着通信网络技术的发展，长期演进(Long Term Evolution，LTE)系统的核心网只保留了分组(Packet Switched，PS)域，称为演进的分组核心(Evolved Packet Core，EPC)网络，演进的分组核心网络主要包含MME、服务网关(Serving Gateway，S-GW)、分组数据网络网关(Packet Data Network Gateway，PGW)三个逻辑实体。LTE系统的无线接入网是演进通用陆地无线接入网络(Evolved Universal Terrestrial Radio Access Network，E-UTRAN),另外，用户设备也可以通过GSM\EDGE无线接入网(GSM EDGE Radio Access Network，GERAN)或者通用陆地无线接入网络(Universal Terrestrial Radio Access Network，UTRAN)接入演进的分组核心网络。LTE系统包括E-UTRAN网络。
目前运营商通过电路(Circuit Switched，CS)域为用户提供语音业务，其中电路域的核心网络主要包含移动交互中心(Mobile Switching Center，MSC)。为了在E-UTRAN网络中向UE提供电路语音业务，在MME与MSC之间引入了SGs接口。在该架构下，UE首先在E-UTRAN网络发起EPS移动性管理(EPS Mobility Management，EMM)联合流程。通过Combined attach流程，UE同时进行EPS服务和非EPS服务的注册，通过该联合流程，MME与MSC为UE创建SGs关联。当UE进行语音呼叫或SMS短信时， 可以通过SGS关联完成。
由于目前运营商都处于混合布网阶段，即在同一个区域4G\3G\2G并存，经常发生InterRAT之间的互操作，例如小区重选操作。经常地，UE首先处于3G网络，移动中3G信号变弱，4G信号变强，UE就会由3G小区重选至4G小区，在重选完成后，UE驻留到4G小区，就会发起combined TAU(Tracking area updating，跟踪区更新)过程。但是由于网络侧的原因，TAU过程并不一定会成功。例如MSC不可达，网络侧失败或网络侧拥塞，都会导致TAU过程的失败(这里指的TAU过程的失败，指的是combined TAU过程对于EPS service是成功的，但对于非EPS service是不成功的)。
在3GPP中规定，对于TAU过程失败原因为#16(MSC temporarily not reachable)或#17(Network failure)或#22(Congestion)，内部会启动一个TAU过程尝试的计数器，如果该计数器小于5，那么会启动一个T3411的计时器timer，在该timer超时后，会重新发起TAU过程，同时计数器加1；如果计数器等于5，必须选择3G或2G的小区进行驻留。但3GPP协议并没有对驻留到3G或2G小区之后的动作做出明确的规定。
但是，若此时选择的3G小区信号依然比较弱，那么UE仍然会根据SIB19消息中的LTE小区列表及小区重选原则进行小区重选操作，重选至LTE小区，由于网络侧的问题，TAU过程又可能失败，如此反复，UE会长时间处于无服务状态，导致用户业务不可用，用户体验非常差。
发明内容
有鉴于此，本发明实施例期望提供一种防止由于频繁小区重选而导致用户业务不可用的网络接入方法及UE。
为了达到上述目的，本发明实施例第一方面提供提出一种网络接入方法，包括：
当用户终端UE进行从第一制式网络小区至第二制式网络小区的重选 操作时，UE向所述第二制式网络小区发起跟踪区更新TAU过程；
当跟踪区更新TAU过程失败，且TAU过程的发起次数达到门限值时，UE选择接入所述第一制式网络小区；
将启动的第二计数器的值加第一预设值，所述第二计数器用于记录所述TAU过程的发起次数达到门限值的次数；
在第二计数器的值与第二计时器的值乘积的时间之后，若满足小区重选操作条件，则UE再次进行从所述第一制式网络小区至第二制式网络小区的重选操作。
优选地，当UE向所述第二制式网络小区间隔发起TAU过程的步骤之前还包括：
UE在接入第一制式网络小区后，接收系统消息块SIB19消息，所述SIB19消息包括小区重选消息；
UE根据所述小区重选消息对所述第二制式网络小区的信号质量进行测量；
当所述第二制式网络小区的信号质量大于测量门限值时，UE进行从第一制式网络小区至第二制式网络小区的重选操作。
优选地，该方法还包括：
当UE发起TAU过程成功后，重置所述第二计数器的值。
优选地，所述第二计时器的值为一个集合，至少包括第一设定时长和第二设定时长，所述第一设定时长小于所述第二设定时长；
当第一计数器的值小于第一设定值时，所述第二计时器的值取值所述第一设定时长；
当第一计数器的值大于或等于第一设定值时，所述第二计时器的值取值所述第二设定时长。
优选地，所述当TAU过程失败，且TAU过程的发起次数达到门限值 时，UE选择接入所述第一制式网络小区的步骤之前包括：
启动第一计数器，所述第一计数器的值等于所述TAU过程的发起次数；
当TAU过程失败时，且所述第一计数器的值小于门限值时，启动第一计时器；
若所述第一计时器超时，UE重新发起TAU过程；并将所述第一计数器的值加第二预设值，重复上一步骤。
本发明实施例第二方面提供一种接入网络的UE，包括：
发起模块，配置为当UE进行从第一制式网络小区至第二制式网络小区的重选操作时，向所述第二制式网络小区发起跟踪区更新TAU过程；
接入模块，配置为当TAU过程失败，且TAU过程的发起次数达到门限值时，选择接入所述第一制式网络小区；
计算模块，配置为将启动的第二计数器的值加第一预设值，所述第二计数器配置为记录所述TAU过程的发起次数达到门限值的次数；
重选操作模块，配置为在第二计数器的值与第二计时器的值乘积的时间之后，若满足小区重选操作条件，则UE再次进行从所述第一制式网络小区至第二制式网络小区的重选操作。
优选地，该UE还包括：
接收模块，配置为在接入第一制式网络小区后，接收系统消息块SIB19消息，所述SIB19消息包括小区重选消息；
测量模块，配置为根据所述小区重选消息对所述第一制式网络小区的信号质量进行测量；
所述重选操作模块，还配置为当所述第一制式网络小区的信号质量大于测量门限值时，进行从第一制式网络小区至第二制式网络小区的重选操作。
优选地，该UE还包括：
重置模块，配置为当UE发起TAU过程成功后，重置所述第二计数器的值。
优选地，所述第二计时器的值为一个集合，至少包括第一设定时长和第二设定时长，所述第一设定时长小于所述第二设定时长；
当第一计数器的值小于第一设定值时，所述第二计时器的值取值所述第一设定时长；
当第一计数器的值大于或等于第一设定值时，所述第二计时器的值取值所述第二设定时长。
优选地，该UE还包括：
计数器启动模块，配置为启动第一计数器，所述第一计数器的值等于所述TAU过程的发起次数；
计时器启动模块，配置为当TAU过程失败时，且所述第一计数器的值小于门限值时，启动第一计时器；
所述发起模块，还配置为当所述第一计时器超时时，重新发起TAU过程；并由所述计算模块将所述第一计数器的值加第二预设值。
本发明实施例第三方面提供一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令配置为执行本法实施例第一方面所述方法的至少其中之一
本发明实施例提出的一种网络接入方法及UE，通过引入第二计数器和第二计时器，可以使UE在TAU过程失败后，能够在一段时间驻留在前一制式网络小区(比如3G或2G小区)进行用户业务，然后尝试在第二制式小区(比如4G小区)进行TAU过程，避免了UE由于TAU过程失败导致频繁小区重选，造成UE长时间处于无服务状态导致用户业务不可用的问题。
附图说明
图1是本发明实施例提供的第一种网络接入方法的流程示意图；
图2是本发明实施例提供的第二种网络接入方法的流程示意图；
图3是本发明实施例提供的第三种网络接入方法的流程示意图；
图4是本发明实施例提供的第四种网络接入方法的流程示意图；
图5是本发明实施例提供的第五种网络接入方法的流程示意图；
图6是本发明实施例所述的第一种接入网络的UE的结构示意图；
图7是本发明实施例所述的第二种接入网络的UE的结构示意图；
图8是本发明实施例所述的第三种接入网络的UE的结构示意图；
图9是本发明实施例所述的第四种接入网络的UE的结构示意图。
具体实施方式
以下结合附图对本发明的优选实施例进行详细说明，应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
本发明实施例所述方法包括：UE在TAU过程失败选择接入第一制式网络小区时，启动第二计时器，第二计数器用于记录TAU过程的发起次数A1达到门限值的次数；在A2*T2时间之后，若满足小区重选操作条件，则UE再次进行从第一制式网络小区至第二制式网络小区的重选操作，由此可以在一段时间内保证UE可以在第一制式网络小区驻留并进行用户业务，即使第一制式网络小区处于弱信号的情况下，避免频繁小区重选而导致用户业务不可用情况的出现。
如图1所示，本发明一实施例提出一种网络接入方法，包括：
步骤S101，当UE进行从第一制式网络小区至第二制式网络小区的重选操作时，UE向所述第二制式网络小区发起TAU过程；
以第一制式网络为3G网络(以UMTS网络为例)，第二制式网络为4G 网络(以LTE网络为例)为例，UE所在场所4G\3G网络同覆盖，UE首先处于UMTS网络，在该网络中会接收到SIB(system information block，系统消息块)19消息，该SIB19消息中包含了LTE小区的频点及优先级等小区重选信息。
当UMTS网络信号质量变差时，根据SIB19中的小区重选信息，UE会对LTE小区的信号质量进行测量，若LTE小区的信号质量大于测量门限时，就会发生小区重选操作，由UMTS小区重选至LTE小区，该过程在3GPP24.301中有明确规定，不再赘述。
当UE由UMTS小区重选至LTE小区后，会进行TAU过程(Tracking area updating procedure)，在LTE小区进行注册。
步骤S102，当TAU过程失败，且TAU过程的发起次数A1达到门限值时，UE选择接入所述第一制式网络小区；
在UE由UMTS小区重选至LTE小区，发起TAU过程时，由于网络侧布网错误等原因，TAU过程并不一定会成功。当TAU过程失败时，会重新发起TAU过程，当TAU过程的发起次数A1达到门限值时，UE选择接入所述第一制式网络小区。
步骤S103，将启动的第二计数器的值A2加1，所述第二计数器用于记录所述TAU过程的发起次数A1达到门限值的次数；其中，第二计数器的值A2每次所加的值可以为一设定值(本实施例定义为第一预设值)，本实施例以加任意整数进行举例，例如1，但不限于加1。比如还可以为2、3等值。
步骤S104，在A2*T2时间之后，若满足小区重选操作条件，则UE再次进行从所述第一制式网络小区至第二制式网络小区的重选操作，所述T2为第二计时器的值；返回步骤S101，直至TAU过程发起成功。
本实施例在UE内部增设了第二计数器和第二计时器，第二计数器的值 为A2，第二计时器的值为T2，当UE选择接入第一制式网络小区后，启动第二计数器，第二计数器用于记录TAU过程的发起次数A1达到门限值的次数。
在A2*T2时间之后，若满足小区重选操作条件，则UE再次进行从所述第一制式网络小区至第二制式网络小区的重选操作。
重复上述过程，直至TAU过程发起成功。
本实施例通过上述方案，通过引入第二计数器和第二计时器，可以使UE在TAU过程失败后，能够在一段时间驻留在前一制式网络小区(比如3G或2G小区)进行用户业务，然后尝试在第二制式小区(比如4G小区)进行TAU过程，避免了UE由于TAU过程失败导致频繁小区重选，造成UE长时间处于无服务状态导致用户业务不可用的问题。
如图2所示，本发明另一实施例提出一种网络接入方法，在上述图1所示的实施例的基础上，在上述步骤S101之前还包括：
步骤S105，UE在接入第一制式网络小区后，接收SIB19消息，所述SIB19消息包括小区重选消息；
步骤S106，UE根据所述小区重选消息对所述第二制式网络小区的信号质量进行测量；
步骤S107，当所述第二制式网络小区的信号质量大于测量门限值时，UE进行从第一制式网络小区至第二制式网络小区的重选操作。
此外，在上述步骤S101之后还包括：
步骤S108，启动第一计数器，所述第一计数器的值等于所述TAU过程的发起次数A1；
步骤S109，当TAU过程失败时，且所述第一计数器的值A1小于门限值时，启动第一计时器；
步骤S110，若所述第一计时器超时，UE重新发起TAU过程；并将所 述第一计数器的值A1加1，返回步骤S109，直至第一计数器的值A1达到门限值。
本实施例与上述图1所示的实施例的区别在于，本实施例还包括UE进行第一制式网络小区至第二制式网络小区的重选操作的方案，以及TAU过程失败后，UE选择接入第一制式网络小区前的处理方案。
具体地，以3G网络为UMTS网络为例，其它制式的目标网络同理。
UE所在场所4G\3G网络同覆盖，首先处于UMTS网络，在该网络中会接收到SIB19消息，该消息中包含了LTE小区的频点及优先级等小区重选信息。当UMTS网络信号质量变差时，根据SIB19中的小区重选信息，UE会对LTE小区的信号质量进行测量，若LTE小区的信号质量大于测量门限时，就会发生小区重选操作，由UMTS小区重选至LTE小区，该过程在3GPP 24.301中有明确规定，不再赘述。
当UE由UMTS小区重选至LTE小区后，会进行TAU过程(Tracking area updating procedure)，在LTE小区进行注册。但是由于网络侧布网错误等原因，UE会接收到TRACKING AREA UPDATE ACCEPT消息，且该消息可以包含如下EMM CAUSE之一：
#16(MSC temporarily not reachable)，#17(Network failure)，或者#22(Congestion)。
UE内部会根据3GPP规定起一个TAU尝试计数器，这里称之为第一计数器A1，如果A1的值小于设定的门限值(以门限值为5举例)，那么会启动一个T3411的计时器(本实施例所称第一计时器)T1，如果第一计时器T1超时，UE会重新发起TAU过程；如果A1的值等于5，UE会选择UMTS作为接入技术，接入网络。
由于当前UMTS小区的信号质量仍然很差，那么根据小区重选的规则，又会发起LTE小区的重选操作。为了避免这种频繁的小区重选，本实施例 增加了一个第二计数器A2和第二计时器T2。这里假设第二计时器T2的值为10min。第二计数器A2会记录第一计数器A1等于5的次数。也就是说，如果A1的值等于5，那么UE会选择UMTS作为接入技术，此时A2的值就会加1。当然，本实施例是以第二计数器的值A1加1进行举例，可选地，第二计数器的值A1每次所加的值可以为一设定值(本实施例定义为第二预设值)，本实施例以加任意整数进行举例，如前述1，但不限于加1，比如还可以为2、3等值。
当UE选择UMTS作为接入技术接入网络后，至少要等A2*T2这么长的时间，才能再次进行LTE的小区重选过程，那么在A2*T2这段时间中，UE可以继续使用UMTS进行用户业务。
本实施例通过上述方案，通过引入第二计数器和第二计时器，可以使UE在TAU过程失败后，能够在一段时间驻留在前一制式网络小区(比如3G或2G小区)进行用户业务，然后尝试在第二制式小区(比如4G小区)进行TAU过程，避免了UE由于TAU过程失败导致频繁小区重选，造成UE长时间处于无服务状态导致用户业务不可用的问题。
如图3所示，本发明又一实施例提出一种网络接入方法，在上述图2所示的实施例的基础上，在上述步骤S104之后，还包括：
步骤S111，当UE发起TAU过程成功后，重置所述第二计数器的值A2。
本实施例与上述图2所示的实施例的区别在于，本实施例还包括UE发起TAU过程成功后，重置第二计数器的值A2的方案。
第二计数器的值A2在UE能够成功进行TAU过程后，也就是说在能够成功注册到4G小区后，重置。其中，重置第二计数器的值A2是为了便于下次进行小区重选操作。
进一步需要说明的是，第二计时器的值T2可以有多种取值组合，比如 包括第一设定时长和第二设定时长，所述第一设定时长小于所述第二设定时长。
当第一计数器的值A2小于第一设定值时，所述第二计时器的值T2取值第一设定时长；当第一计数器的值A2大于或等于第一设定值时，所述第二计时器的值T2取值第二设定时长。
举例如下：
第二计时器的值T2可以是一个取值集合{10min，20min}，如果第二计数器A2的值小于5，那么当UE选择UMTS作为接入技术接入网络后，至少要等10min这么长的时间，才能再次进行LTE的小区重选过程；当第二计数器A2的值大于或等于5后，那么当UE选择UMTS作为接入技术接入网络后，至少要等100min这么长的时间，才能再次进行LTE的小区重选过程。
上述过程可以在一段时间保证UE可以在UMTS小区驻留并进行用户业务，即使UMTS小区处于弱信号的情况下，避免了频繁小区重选而导致用户业务不可用情况的出现，有较好的用户体验。
下面分别以第二计时器的值T2为固定值10min，以及为取值集合{10min，20min}两个实例对本实施例方案进行详细阐述。
实例一(T2为固定值10min，如图4所示)
该方案包括以下步骤：
步骤一，终端驻留到3G小区。
步骤二，当前场景下，3G小区的信号变弱，4G小区的信号变强。
步骤三，若满足小区重选的标准，继续步骤四；否则继续步骤二。
步骤四，满足小区重选的标准，UE重选到4G小区。
步骤五，UE发起TAU过程，在4G小区上进行注册，网络侧下发TRACKING AREA UPDATE ACCEPT消息，且该消息可以包含如下EMM  CAUSE之一：
#16(MSC temporarily not reachable)，#17(Network failure)，或者#22(Congestion)。TAU过程失败。
步骤六，UE内部起一个计数器Counter A1，加1，判断A1的值如果小于5，则继续步骤五；如果A1的值等于5，继续步骤七；
步骤七，UE选择3G小区，并进行驻留，内部起一个计数器Counter A2，加1；同时内部有一个Timer，有预设值；UE至少需要在3G小区驻留A2*Timer这么长的时间；
步骤八，A2*Timer如果超时，可以进行小区重选操作；否则继续在3G小区进行驻留。
实例二(T2为取值集合{10min，20min}，如图5所示)
步骤一，终端驻留到3G小区。
步骤二，当前场景下，3G小区的信号变弱，4G小区的信号变强。
步骤三，若满足小区重选的标准，继续步骤四；否则继续步骤二。
步骤四，满足小区重选的标准，UE重选到4G小区。
步骤五，UE发起TAU过程，在4G小区上进行注册，网络侧下发TRACKING AREA UPDATE ACCEPT消息，且该消息可以包含如下EMM CAUSE之一：
#16(MSC temporarily not reachable)，#17(Network failure)，或者#22(Congestion)。TAU过程失败。
步骤六，UE内部起一个计数器Counter A1，加1，判断A1的值如果小于5，则继续步骤五；如果A1的值等于5，继续步骤七；
步骤七，UE选择3G小区，并进行驻留，内部起一个计数器Counter A2，加1；同时内部有一个计时器Timer，有预设值集合；根据A2的取值是否小于5，从集合中选取Timer的取值，UE至少需要在3G小区驻留A2*Timer 这么长的时间；
步骤八，A2*Timer如果超时，可以进行小区重选操作；否则继续在3G小区进行驻留。
本发明实施例网络接入方法及UE，通过引入第二计数器和第二计时器，可以使UE在TAU过程失败后，能够在一段时间驻留在前一制式网络小区(比如3G或2G小区)进行用户业务，然后尝试在第二制式小区(比如4G小区)进行TAU过程，避免了UE由于TAU过程失败导致频繁小区重选，造成UE长时间处于无服务状态导致用户业务不可用的问题。
对应上述方法实施例，如图6所示，提出本发明接入网络的UE的一实施例，该UE包括：发起模块201、接入模块202、计算模块203及重选操作模块204，其中：
发起模块201，配置为当UE进行从第一制式网络小区至第二制式网络小区的重选操作时，向所述第二制式网络小区发起TAU过程；
接入模块202，配置为当TAU过程失败，且TAU过程的发起次数A1达到门限值时，选择接入所述第一制式网络小区；
计算模块203，配置为将启动的第二计数器的值A2加1，所述第二计数器配置为记录所述TAU过程的发起次数A1达到门限值的次数；其中，第二计数器的值A2每次所加的值可以为一设定值(本实施例定义为第一预设值)，本实施例以加任意整数进行举例，例如1，但不限于加1。比如还可以为2、3等值。
重选操作模块204，配置为在A2*T2时间之后，若满足小区重选操作条件，则UE再次进行从所述第一制式网络小区至第二制式网络小区的重选操作，所述T2为第二计时器的值；以此循环。
以第一制式网络为3G网络(以UMTS网络为例)，第二制式网络为4G网络(以LTE网络为例)为例，UE所在场所4G\3G网络同覆盖，UE首先 处于UMTS网络，在该网络中会接收到SIB19消息，该SIB19消息中包含了LTE小区的频点及优先级等小区重选信息。
当UMTS网络信号质量变差时，根据SIB19中的小区重选信息，UE会对LTE小区的信号质量进行测量，若LTE小区的信号质量大于测量门限时，就会发生小区重选操作，由UMTS小区重选至LTE小区，该过程在3GPP24.301中有明确规定，不再赘述。
当UE由UMTS小区重选至LTE小区后，会进行TAU过程(Tracking area updating procedure)，在LTE小区进行注册。
在UE由UMTS小区重选至LTE小区，发起TAU过程时，由于网络侧布网错误等原因，TAU过程并不一定会成功。当TAU过程失败时，会重新发起TAU过程，当TAU过程的发起次数A1达到门限值时，UE选择接入所述第一制式网络小区。
本实施例在UE内部增设了第二计数器和第二计时器，第二计数器的值为A2，第二计时器的值为T2，当UE选择接入第一制式网络小区后，启动第二计数器，第二计数器配置为记录TAU过程的发起次数A1达到门限值的次数。
在A2*T2时间之后，若满足小区重选操作条件，则UE再次进行从所述第一制式网络小区至第二制式网络小区的重选操作。
重复上述过程，直至TAU过程发起成功。
本实施例通过上述方案，通过引入第二计数器和第二计时器，可以使UE在TAU过程失败后，能够在一段时间驻留在前一制式网络小区(比如3G或2G小区)进行用户业务，然后尝试在第二制式小区(比如4G小区)进行TAU过程，避免了UE由于TAU过程失败导致频繁小区重选，造成UE长时间处于无服务状态导致用户业务不可用的问题。
如图7所示，本发明另一实施例提出一种接入网络的UE，在上述图6 所示的实施例的基础上，还包括：
接收模块205，配置为在接入第一制式网络小区后，接收SIB19消息，所述SIB19消息包括小区重选消息；
测量模块206，配置为根据所述小区重选消息对所述第二制式网络小区的信号质量进行测量；
所述重选操作模块204，还配置为当所述第二制式网络小区的信号质量大于测量门限值时，进行从第一制式网络小区至第二制式网络小区的重选操作。
本实施例与上述图6所示的实施例的区别在于，本实施例还包括UE进行第一制式网络小区至第二制式网络小区的重选操作的方案，以及TAU过程失败后，UE选择接入第一制式网络小区前的处理方案。
具体地，以3G网络为UMTS网络为例，其它制式的目标网络同理。
UE所在场所4G\3G网络同覆盖，首先处于UMTS网络，在该网络中会接收到SIB19消息，该消息中包含了LTE小区的频点及优先级等小区重选信息。当UMTS网络信号质量变差时，根据SIB19中的小区重选信息，UE会对LTE小区的信号质量进行测量，若LTE小区的信号质量大于测量门限时，就会发生小区重选操作，由UMTS小区重选至LTE小区，该过程在3GPP 24.301中有明确规定，不再赘述。
当UE由UMTS小区重选至LTE小区后，会进行TAU过程(Tracking area updating procedure)，在LTE小区进行注册。但是由于网络侧布网错误等原因，UE会接收到TRACKING AREA UPDATE ACCEPT消息，且该消息可以包含如下EMM CAUSE之一：
#16(MSC temporarily not reachable)，#17(Network failure)，或者#22(Congestion)。
UE内部会根据3GPP规定起一个TAU尝试计数器，这里称之为第一计 数器A1，如果A1的值小于设定的门限值(以门限值为5举例)，那么会启动一个T3411的计时器(本实施例所称第一计时器)T1，如果第一计时器T1超时，UE会重新发起TAU过程；如果A1的值等于5，UE会选择UMTS作为接入技术，接入网络。
由于当前UMTS小区的信号质量仍然很差，那么根据小区重选的规则，又会发起LTE小区的重选操作。为了避免这种频繁的小区重选，本实施例增加了一个第二计数器A2和第二计时器T2。这里假设第二计时器T2的值为10min。第二计数器A2会记录第一计数器A1等于5的次数。也就是说，如果A1的值等于5，那么UE会选择UMTS作为接入技术，此时A2的值就会加1。当然，本实施例是以第二计数器的值A1加1进行举例，可选地，第二计数器的值A1每次所加的值可以为一设定值(本实施例定义为第二预设值)，本实施例以加任意整数进行举例，如前述1，但不限于加1，比如还可以为2、3等值。
当UE选择UMTS作为接入技术接入网络后，至少要等A2*T2这么长的时间，才能再次进行LTE的小区重选过程，那么在A2*T2这段时间中，UE可以继续使用UMTS进行用户业务。
本实施例通过上述方案，通过引入第二计数器和第二计时器，可以使UE在TAU过程失败后，能够在一段时间驻留在前一制式网络小区(比如3G或2G小区)进行用户业务，然后尝试在第二制式小区(比如4G小区)进行TAU过程，避免了UE由于TAU过程失败导致频繁小区重选，造成UE长时间处于无服务状态导致用户业务不可用的问题。
如图8所示，本发明又一实施例提出一种接入网络的UE，在上述图7所示的实施例的基础上，还包括：
重置模块207，配置为当UE发起TAU过程成功后，重置所述第二计数器的值A2。
本实施例与上述图7所示的实施例的区别在于，本实施例还包括UE发起TAU过程成功后，重置第二计数器的值A2的方案。
第二计数器的值A2在UE能够成功进行TAU过程后，也就是说在能够成功注册到4G小区后，重置。其中，重置第二计数器的值A2是为了便于下次进行小区重选操作。
进一步需要说明的是，第二计时器的值T2可以有多种取值组合，比如包括第一设定时长和第二设定时长，所述第一设定时长小于所述第二设定时长。
当第一计数器的值A2小于第一设定值时，所述第二计时器的值T2取值第一设定时长；当第一计数器的值A2大于或等于第一设定值时，所述第二计时器的值T2取值第二设定时长。
举例如下：
第二计时器的值T2可以是一个取值集合{10min，20min}，如果第二计数器A2的值小于5，那么当UE选择UMTS作为接入技术接入网络后，至少要等10min这么长的时间，才能再次进行LTE的小区重选过程；当第二计数器A2的值大于或等于5后，那么当UE选择UMTS作为接入技术接入网络后，至少要等100min这么长的时间，才能再次进行LTE的小区重选过程。
上述过程可以在一段时间保证UE可以在UMTS小区驻留并进行用户业务，即使UMTS小区处于弱信号的情况下，避免了频繁小区重选而导致用户业务不可用情况的出现，有较好的用户体验。
下面分别以第二计时器的值T2为固定值10min，以及为取值集合{10min，20min}两个实例对本实施例方案进行详细阐述。
实例一(T2为固定值10min，如图4所示)
该方案包括以下步骤：
步骤一，终端驻留到3G小区。
步骤二，当前场景下，3G小区的信号变弱，4G小区的信号变强。
步骤三，若满足小区重选的标准，继续步骤四；否则继续步骤二。
步骤四，满足小区重选的标准，UE重选到4G小区。
步骤五，UE发起TAU过程，在4G小区上进行注册，网络侧下发TRACKING AREA UPDATE ACCEPT消息，且该消息可以包含如下EMM CAUSE之一：
#16(MSC temporarily not reachable)，#17(Network failure)，或者#22(Congestion)。TAU过程失败。
步骤六，UE内部起一个计数器Counter A1，加1，判断A1的值如果小于5，则继续步骤五；如果A1的值等于5，继续步骤七；
步骤七，UE选择3G小区，并进行驻留，内部起一个计数器Counter A2，加1；同时内部有一个Timer，有预设值；UE至少需要在3G小区驻留A2*Timer这么长的时间；
步骤八，A2*Timer如果超时，可以进行小区重选操作；否则继续在3G小区进行驻留。
实例二(T2为取值集合{10min，20min}，如图5所示)
步骤一，终端驻留到3G小区。
步骤二，当前场景下，3G小区的信号变弱，4G小区的信号变强。
步骤三，若满足小区重选的标准，继续步骤四；否则继续步骤二。
步骤四，满足小区重选的标准，UE重选到4G小区。
步骤五，UE发起TAU过程，在4G小区上进行注册，网络侧下发TRACKING AREA UPDATE ACCEPT消息，且该消息可以包含如下EMM CAUSE之一：
#16(MSC temporarily not reachable)，#17(Network failure)，或者#22 (Congestion)。TAU过程失败。
步骤六，UE内部起一个计数器Counter A1，加1，判断A1的值如果小于5，则继续步骤五；如果A1的值等于5，继续步骤七；
步骤七，UE选择3G小区，并进行驻留，内部起一个计数器Counter A2，加1；同时内部有一个计时器Timer，有预设值集合；根据A2的取值是否小于5，从集合中选取Timer的取值，UE至少需要在3G小区驻留A2*Timer这么长的时间；
步骤八，A2*Timer如果超时，可以进行小区重选操作；否则继续在3G小区进行驻留。
本发明实施例网络接入方法及UE，通过引入第二计数器和第二计时器，可以使UE在TAU过程失败后，能够在一段时间驻留在前一制式网络小区(比如3G或2G小区)进行用户业务，然后尝试在第二制式小区(比如4G小区)进行TAU过程，避免了UE由于TAU过程失败导致频繁小区重选，造成UE长时间处于无服务状态导致用户业务不可用的问题。
本发明实施例还记载了一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令配置为执行本发明实施例中所述方法的至少其中之一；具体如图1至图5中所述方法的至少其中之一；所述计算及存储介质具体可为U盘、光盘或磁带等存储介质，优选为非瞬间存储介质。
如图9所示，本实施例还提供一种接入网络的UE，所述UE包括处理器302、存储介质304以及至少一个外部通信接口301；所述处理器302、存储介质304以及外部通信接口301均通过总线303连接。所述处理器302可为微处理器、中央处理器、数字信号处理器或可编程逻辑阵列等具有处理功能的电子元器件。所述存储介质中存储有计算机可执行指令；
所述处理器读取并运行执行所述存储介质304中的计算机可执行指令， 能够执行本发明实施例第一方面所述的方法的至少其中之一。
以上所述，仅为本发明的较佳实施例而已，并非配置为限定本发明的保护范围。凡按照本发明原理所作的修改，都应当理解为落入本发明的保护范围。

Claims (11)

  1. 一种网络接入方法，包括：
    当用户终端UE进行从第一制式网络小区至第二制式网络小区的重选操作时，UE向所述第二制式网络小区发起跟踪区更新TAU过程；
    当跟踪区更新TAU过程失败，且TAU过程的发起次数达到门限值时，UE选择接入所述第一制式网络小区；
    将启动的第二计数器的值加第一预设值，所述第二计数器配置为记录所述TAU过程的发起次数达到门限值的次数；
    在第二计数器的值与第二计时器的值乘积的时间之后，若满足小区重选操作条件，则UE再次进行从所述第一制式网络小区至第二制式网络小区的重选操作。
  2. 根据权利要求1所述的方法，其中，当UE向所述第二制式网络小区间隔发起TAU过程的步骤之前还包括：
    UE在接入第一制式网络小区后，接收系统消息块SIB19消息，所述SIB19消息包括小区重选消息；
    UE根据所述小区重选消息对所述第二制式网络小区的信号质量进行测量；
    当所述第二制式网络小区的信号质量大于测量门限值时，UE进行从第一制式网络小区至第二制式网络小区的重选操作。
  3. 根据权利要求1所述的方法，其中，还包括：
    当UE发起TAU过程成功后，重置所述第二计数器的值。
  4. 根据权利要求1所述的方法，其中，所述第二计时器的值为一个集合，至少包括第一设定时长和第二设定时长，所述第一设定时长小于所述第二设定时长；
    当第一计数器的值小于第一设定值时，所述第二计时器的值取值所述 第一设定时长；
    当第一计数器的值大于或等于第一设定值时，所述第二计时器的值取值所述第二设定时长。
  5. 根据权利要求1-4中任一项所述的方法，其中，所述当TAU过程失败，且TAU过程的发起次数达到门限值时，UE选择接入所述第一制式网络小区的步骤之前包括：
    启动第一计数器，所述第一计数器的值等于所述TAU过程的发起次数；
    当TAU过程失败时，且所述第一计数器的值小于门限值时，启动第一计时器；
    若所述第一计时器超时，UE重新发起TAU过程；并将所述第一计数器的值加第二预设值，重复上一步骤。
  6. 一种接入网络的UE，包括：
    发起模块，配置为当UE进行从第一制式网络小区至第二制式网络小区的重选操作时，向所述第二制式网络小区发起跟踪区更新TAU过程；
    接入模块，配置为当TAU过程失败，且TAU过程的发起次数达到门限值时，选择接入所述第一制式网络小区；
    计算模块，配置为将启动的第二计数器的值加第一预设值，所述第二计数器配置为记录所述TAU过程的发起次数达到门限值的次数；
    重选操作模块，配置为在第二计数器的值与第二计时器的值乘积的时间之后，若满足小区重选操作条件，则UE再次进行从所述第一制式网络小区至第二制式网络小区的重选操作。
  7. 根据权利要求6所述的UE，其中，还包括：
    接收模块，配置为在接入第一制式网络小区后，接收系统消息块SIB19消息，所述SIB19消息包括小区重选消息；
    测量模块，配置为根据所述小区重选消息对所述第二制式网络小区的 信号质量进行测量；
    所述重选操作模块，还配置为当所述第二制式网络小区的信号质量大于测量门限值时，进行从第一制式网络小区至第二制式网络小区的重选操作。
  8. 根据权利要求6所述的UE，其中，还包括：
    重置模块，配置为当UE发起TAU过程成功后，重置所述第二计数器的值。
  9. 根据权利要求6所述的UE，其中，所述第二计时器的值为一个集合，至少包括第一设定时长和第二设定时长，所述第一设定时长小于所述第二设定时长；
    当第一计数器的值小于第一设定值时，所述第二计时器的值取值所述第一设定时长；
    当第一计数器的值大于或等于第一设定值时，所述第二计时器的值取值所述第二设定时长。
  10. 根据权利要求6-9中任一项所述的UE，其中，还包括：
    计数器启动模块，配置为启动第一计数器，所述第一计数器的值等于所述TAU过程的发起次数；
    计时器启动模块，配置为当TAU过程失败时，且所述第一计数器的值小于门限值时，启动第一计时器；
    所述发起模块，还配置为当所述第一计时器超时时，重新发起TAU过程；并由所述计算模块将所述第一计数器的值加第二预设值。
  11. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令配置为执行权利要求1至5所述方法的至少其中之一。
PCT/CN2014/086856 2014-07-24 2014-09-18 网络接入方法及ue和计算机存储介质 WO2015117324A1 (zh)

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