CN110113791B - Mobile terminal and method for falling back to cell - Google Patents

Mobile terminal and method for falling back to cell Download PDF

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Publication number
CN110113791B
CN110113791B CN201910386206.5A CN201910386206A CN110113791B CN 110113791 B CN110113791 B CN 110113791B CN 201910386206 A CN201910386206 A CN 201910386206A CN 110113791 B CN110113791 B CN 110113791B
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mobile terminal
cell
fallback
mme
enb
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CN110113791A (en
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张余
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • 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
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel

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

Abstract

本发明提供一种移动终端及其回落小区的方法。该方法包括移动终端接收MME发送的寻呼请求，并向MME发送扩展业务请求；MME指示eNB将回落小区配置信息发送给移动终端；移动终端接收回落小区配置信息，对配置的回落小区进行测量，并将测量结果发送给eNB；eNB对测量结果进行处理，以获得最佳回落小区；最佳回落小区为允许接入且信号最佳的回落小区；eNB指示移动终端回落到最佳回落小区；移动终端根据指示回落到最佳回落小区。该方法能够避免由于回落小区处于拥塞状态或者其他通信不良状态拒绝移动终端接入的情况发生，从而确保移动终端能够回落成功，顺利建立呼叫，改善了用户体验。

Figure 201910386206

The present invention provides a mobile terminal and a method for falling back to a cell. The method includes: the mobile terminal receives the paging request sent by the MME, and sends the extended service request to the MME; the MME instructs the eNB to send the fallback cell configuration information to the mobile terminal; the mobile terminal receives the fallback cell configuration information, and measures the configured fallback cell, Send the measurement results to the eNB; the eNB processes the measurement results to obtain the best fallback cell; the best fallback cell is the fallback cell that allows access and has the best signal; the eNB instructs the mobile terminal to fall back to the best fallback cell; The terminal falls back to the best fallback cell according to the instruction. The method can avoid the situation that the mobile terminal is denied access because the fallback cell is in a congested state or other poor communication conditions, thereby ensuring that the mobile terminal can fall back successfully, establish a call smoothly, and improve user experience.

Figure 201910386206

Description

Mobile terminal and method for falling back to cell
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a mobile terminal and a cell falling method thereof.
Background
Currently, in a CSFB call implementation process, when a mobile terminal has an incoming call, an MSC sends a paging request to an MME, the MME sends a paging request to the mobile terminal, the mobile terminal receives the paging request sent by the MME, the mobile terminal sends an extended service request to the MME, and the mobile terminal performs cell fallback by measuring a fallback cell and receiving a suitable fallback cell determined and sent back by an eNB, thereby establishing a call.
However, in the above process, since the eNB does not know the current state of the fallback cell, when the mobile terminal falls back to the cell, the cell may be in a congested state or in another poor communication state to reject the mobile terminal to access, which may cause a fallback failure of the mobile terminal, and a call may not be established, which may affect user experience.
Disclosure of Invention
The present invention provides a mobile terminal and a method for dropping a cell thereof, which aims at the technical problems in the prior art. The method can screen and obtain the best fallback cell which is allowed to be accessed and has the best signal from a plurality of configured fallback cells, the mobile terminal falls back to the best fallback cell, and the situation that the mobile terminal is refused to be accessed due to the fact that the fallback cell is in a congestion state or other poor communication states can be avoided, so that the mobile terminal can successfully fall back, call can be established smoothly, and user experience is improved.
The invention provides a method for a mobile terminal to fall back to a cell, which comprises the following steps:
the mobile terminal receives a paging request sent by an MME and sends an extended service request to the MME;
the MME instructs the eNB to send the configuration information of the fallback cell to the mobile terminal;
the mobile terminal receives the configuration information of the fallback cell, measures the configured fallback cell and sends a measurement result to the eNB;
the eNB processes the measurement result to obtain an optimal fallback cell; the best fallback cell is the fallback cell which is allowed to be accessed and has the best signal;
the eNB instructs the mobile terminal to fall back to the best fall-back cell;
and the mobile terminal falls back to the optimal falling cell according to the indication.
Preferably, the processing, by the eNB, the measurement result to obtain the best fallback cell includes:
the eNB extracts the frequency point information of the n fallback cells with the best signals in the measurement results; wherein n is less than the number of configured fallback cells;
the eNB sends a confirmation request of whether the best n fallback cells can be accessed to the MSC through the MME;
the MSC responds according to the state of the n fallback cells with the best signals;
and the eNB receives the response result of the MSC and selects the fallback cell which is allowed to be accessed and has the best signal as the best fallback cell according to the response result.
Preferably, the mobile terminal is a 4G multimode card, and before the mobile terminal receives a paging request sent by an MME and sends an extended service request to the MME, the method further includes:
the mobile terminal performs the joint attachment of the 4G multi-mode card.
Preferably, the jointly attaching the 4G multi-mode card by the mobile terminal includes:
the mobile terminal 4G multimode card sends an attachment request message to the MME;
MME sends SGs location update request message to corresponding VLR; the SGs location updating request message comprises LAI of the mobile terminal, IMSI of the 4G multi-mode card, MME information and location updating type;
VLR stores the MME information and establishes SGs association with a 4G multimode card under MME;
the VLR initiates a 4G multi-mode card position updating flow to the HLR according to the LAI and the IMSI of the 4G multi-mode card, and returns confirmation information to the MME after the updating is completed;
and the MME sends an attachment completion message to the mobile terminal to complete the joint attachment of the 4G multi-mode card.
Preferably, the mobile terminal further includes, after dropping back to the cell:
judging whether the LAI of the mobile terminal fallback cell is consistent with the LAI of the cell when the 4G multi-mode card is attached in a combined mode;
and if not, the mobile terminal carries out position updating.
The present invention also provides a mobile terminal, comprising:
the fallback request module is used for receiving the paging request sent by the MME and sending an extended service request to the MME;
a first receiving module, configured to receive fallback cell configuration information sent by an eNB;
the measurement module is used for measuring the configured fallback cell and sending a measurement result to the eNB;
the processing module is used for processing the measurement result to obtain an optimal fallback cell; the best fallback cell is the fallback cell which is allowed to be accessed and has the best signal;
a second receiving module, configured to receive an indication sent by an eNB to fall back to the optimal fallback cell;
and the fallback module is used for falling back to the optimal fallback cell according to the indication.
Preferably, the processing module comprises:
an extracting unit, configured to extract frequency point information of n fallback cells with best signals in the measurement result; wherein n is less than the number of configured fallback cells;
a request unit, configured to send, to an MSC through an MME, a confirmation request that signals whether the best n fallback cells can be accessed;
and a receiving selection unit, configured to receive a response result of the MSC, and select the fallback cell with the best signal and allowed to access as the best fallback cell according to the response result.
Preferably, the combined attachment module is further included for performing combined attachment of the 4G multi-mode card.
Preferably, the system further comprises a judging module, configured to judge whether the fallback cell LAI of the mobile terminal is consistent with the cell LAI of the 4G multimode card when the mobile terminal is attached to the 4G multimode card;
and the position updating module is used for updating the position of the mobile terminal when the judgment result of the judging module is negative.
The invention has the beneficial effects that: the method for the mobile terminal to fall back to the cell provided by the invention has the advantages that the eNB processes the measurement result to obtain the best fall back cell, the best fall back cell which is allowed to be accessed and has the best signal can be screened from a plurality of configured fall back cells, and the mobile terminal falls back to the best fall back cell, so that the situation that the mobile terminal is refused to be accessed due to the fact that the fall back cell is in a congestion state or other poor communication states can be avoided, the mobile terminal can successfully fall back, the call can be smoothly established, and the user experience is improved.
The mobile terminal provided by the invention can screen and obtain the best fallback cell which is allowed to be accessed and has the best signal from a plurality of configured fallback cells by arranging the processing module, and the mobile terminal falls back to the best fallback cell, so that the situation that the mobile terminal is refused to be accessed because the fallback cell is in a congestion state or other poor communication states can be avoided, the mobile terminal can be ensured to successfully fall back, the call is smoothly established, and the user experience is improved.
Drawings
Fig. 1 is a flowchart of a method for a mobile terminal to fall back to a cell in embodiment 1 of the present invention;
fig. 2 is a flowchart illustrating the step S13 in embodiment 2 of the present invention;
fig. 3 is a schematic block diagram of a mobile terminal in embodiment 3 of the present invention.
Wherein the reference numerals are:
1. a fallback request module; 2. a first receiving module; 3. a measurement module; 4. a processing module; 41. an extraction unit; 42. a request unit; 43. a reception selection unit; 5. a second receiving module; 6. a fallback module; 7. a joint attachment module; 8. a judgment module; 9. And a location updating module.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following describes a mobile terminal and a method for dropping a cell thereof in detail with reference to the accompanying drawings and detailed description.
Example 1:
the embodiment provides a method for a mobile terminal to fall back to a cell, as shown in fig. 1, including:
step S10: and the mobile terminal receives the paging request sent by the MME and sends an extended service request to the MME.
Step S11: and the MME instructs the eNB to send the configuration information of the fallback cell to the mobile terminal.
The configuration information of the fallback cells comprises a plurality of configured fallback cells.
Step S12: and the mobile terminal receives the configuration information of the fallback cells, measures the configured fallback cells and sends the measurement results to the eNB.
Step S13: the eNB processes the measurement results to obtain the best fallback cell. The best fallback cell is the fallback cell which allows access and has the best signal.
Step S14: the eNB instructs the mobile terminal to fall back to the best fall-back cell.
Step S15: and the mobile terminal falls back to the best fall-back cell according to the indication.
According to the method for the mobile terminal to fall back to the cell, through the step S13, the best fall back cell which allows access and has the best signal can be obtained, and the mobile terminal can fall back to the best fall back cell, so that the situation that the mobile terminal is refused to access due to the fact that the fall back cell is in a congestion state or other poor communication states is avoided, the mobile terminal can successfully fall back, the call is smoothly established, and user experience is improved.
Example 2:
the embodiment provides a method for a mobile terminal to fall back to a cell, which comprises the following steps:
step S10: and the mobile terminal receives the paging request sent by the MME and sends an extended service request to the MME.
Step S11: and the MME instructs the eNB to send the configuration information of the fallback cell to the mobile terminal.
The configuration information of the fallback cells comprises a plurality of configured fallback cells.
Step S12: and the mobile terminal receives the configuration information of the fallback cells, measures the configured fallback cells and sends the measurement results to the eNB.
Step S13: the eNB processes the measurement results to obtain the best fallback cell. The best fallback cell is the fallback cell which allows access and has the best signal.
The method specifically comprises the following steps: as shown in figure 2 of the drawings, in which,
step S131: and the eNB extracts the frequency point information of the n fallback cells with the best signals in the measurement results. Wherein n is less than the number of configured fallback cells.
Step S132: the eNB sends a confirmation request for signaling whether the best n fallback cells can be accessed to the MSC through the MME.
Step S133: the MSC responds according to the status of the best n fallback cells.
In this step, the MSC stores the frequency point information and the state information of each cell, and sets the state parameters of each cell under jurisdiction. At the beginning, the MSC sets the state parameters of each cell to normal state. The state parameter of the cell includes a congestion state of the cell.
Each base station under the control of the MSC sets congestion parameters of each cell under the control of the MSC and sets a threshold corresponding to each parameter. The cell congestion parameters comprise the average utilization rate of uplink PRBs, the average utilization rate of downlink PRBs, the uplink throughput of the cell during self-busy hour, the downlink throughput of the cell during self-busy hour, the success rate of RRC connection and the like.
When any congestion parameter of the cell reaches the corresponding threshold value, the base station sends the congestion message of the cell to the MSC, and the MSC sets the cell state as the congestion state.
Step S134: and the eNB receives the response result of the MSC and selects the fallback cell which is allowed to be accessed and has the best signal as the best fallback cell according to the response result.
Through the steps S131 to S134, the best fallback cell which allows access and has the best signal can be screened from the configured fallback cells, and the mobile terminal falls back to the best fallback cell, so that the situation that the access of the mobile terminal is rejected due to the fact that the fallback cell is in a congestion state or other poor communication states can be avoided, thereby ensuring that the mobile terminal can successfully fall back, smoothly establishing a call, and improving user experience.
Step S14: the eNB instructs the mobile terminal to fall back to the best fall-back cell.
Step S15: and the mobile terminal falls back to the best fall-back cell according to the indication.
In this embodiment, the mobile terminal is a 4G multi-mode card, and in step S10: the mobile terminal receives the paging request sent by the MME, and before sending the extended service request to the MME, the method further comprises the following steps:
step S09: the mobile terminal performs the joint attachment of the 4G multi-mode card.
The joint attachment of the 4G multimode card means that the 4G multimode card is attached to a 3G network and utilizes the 3G network for communication. After the 4G multi-mode card is attached, the call link of the mobile terminal during the call can be realized.
The method specifically comprises the following steps:
step S091: and the mobile terminal 4G multimode card sends an attachment request message to the MME.
Step S092: and the MME sends an SGs location updating request message to the corresponding VLR. The SGs location update request message includes the LAI of the mobile terminal, the IMSI of the 4G multimode card, MME information, and a location update type.
Step S093: the VLR stores MME information and creates SGs associations with 4G multimode cards under MME.
Step S094: and the VLR initiates a 4G multi-mode card position updating process of the HLR according to the LAI and the IMSI of the 4G multi-mode card, and returns confirmation information to the MME after the updating is finished.
Step S095: and the MME sends an attachment completion message to the mobile terminal to complete the joint attachment of the 4G multi-mode card.
In this embodiment, the mobile terminal further includes, after dropping back to the cell:
step S20: and judging whether the LAI of the fallback cell of the mobile terminal is consistent with the LAI of the cell when the 4G multi-mode card is attached in a combined manner.
If not, step S21 is executed: and the mobile terminal carries out position updating. If so, the process is ended.
Through the steps S20-S21, the mobile terminal after the cell has fallen back can establish a call connection with the caller.
Advantageous effects of examples 1 to 2: the method for a mobile terminal to drop back to a cell provided in embodiment 1-2, where an eNB processes a measurement result to obtain an optimal drop back cell, and the optimal drop back cell that allows access and has an optimal signal can be screened from a plurality of configured drop back cells, and the mobile terminal drops back to the optimal drop back cell, so that a situation that the mobile terminal is rejected to access due to the drop back cell being in a congested state or other poor communication states can be avoided, thereby ensuring that the mobile terminal can drop back successfully, smoothly establish a call, and improving user experience.
Example 3:
based on the method for a mobile terminal to fall back to a cell provided in embodiment 2, this embodiment provides a mobile terminal, as shown in fig. 3, including: and the fallback request module 1 is configured to receive a paging request sent by the MME, and send an extended service request to the MME. A first receiving module 2, configured to receive fallback cell configuration information sent by an eNB. And the measurement module 3 is configured to measure the configured fallback cell and send a measurement result to the eNB. And the processing module 4 is used for processing the measurement result to obtain the optimal fallback cell. The best fallback cell is the fallback cell which allows access and has the best signal. A second receiving module 5, configured to receive an indication sent by the eNB to fall back to the best fallback cell. And the fallback module 6 is used for falling back to the optimal fallback cell according to the indication.
Through the arrangement of the processing module 4, the best fallback cell which allows access and has the best signal can be obtained, and the mobile terminal can fall back to the best fallback cell, so that the situation that the mobile terminal is rejected to access due to the fact that the fallback cell is in a congestion state or other poor communication states is avoided, the mobile terminal can fall back successfully, a call is established smoothly, and user experience is improved.
Wherein, the processing module 4 comprises: and an extracting unit 41, configured to extract frequency point information of n fallback cells with best signals in the measurement result. Wherein n is less than the number of configured fallback cells. A requesting unit 42, configured to send a confirmation request that signals whether the best n fallback cells can be accessed to the MSC through the MME. A receiving and selecting unit 43, configured to receive the response result of the MSC, and select the fallback cell that is allowed to be accessed and has the best signal as the best fallback cell according to the response result.
The extraction unit 41, the request unit 42, and the receiving selection unit 43 can screen the best fallback cell with the best signal and allowed to access from the configured fallback cells, and the mobile terminal falls back to the best fallback cell, so that the situation that the access of the mobile terminal is rejected due to the fact that the fallback cell is in a congestion state or in other poor communication states can be avoided, thereby ensuring that the mobile terminal can successfully fall back, smoothly establishing a call, and improving user experience.
In this embodiment, the mobile terminal further includes a joint attachment module 7, configured to perform joint attachment of a 4G multi-mode card. The setting of the combined attachment module 7 enables the mobile terminal to realize call linking during conversation.
In addition, the mobile terminal further includes a judging module 8, configured to judge whether the fallback cell LAI of the mobile terminal is consistent with the cell LAI of the 4G multimode card when the mobile terminal is attached to the 4G multimode card. And a location updating module 9, configured to update the location of the mobile terminal when the determination result of the determining module 8 is negative. The arrangement of the judging module 8 and the position updating module 9 enables the mobile terminal after the cell falls back to establish a call connection with the calling party.
Beneficial effects of example 3: the mobile terminal provided in embodiment 3, by setting the processing module, can screen and obtain an optimal fallback cell that allows access and has an optimal signal from a plurality of configured fallback cells, and the mobile terminal falls back to the optimal fallback cell, which can avoid a situation that the access of the mobile terminal is denied because the fallback cell is in a congested state or in another poor communication state, thereby ensuring that the mobile terminal can successfully fall back, smoothly establishing a call, and improving user experience.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (7)

1.一种移动终端回落小区的方法，其特征在于，包括：1. A method for a mobile terminal to fall back to a cell, comprising: 移动终端接收MME发送的寻呼请求，并向MME发送扩展业务请求；The mobile terminal receives the paging request sent by the MME, and sends an extended service request to the MME; MME指示eNB将回落小区配置信息发送给移动终端；The MME instructs the eNB to send the fallback cell configuration information to the mobile terminal; 移动终端接收所述回落小区配置信息，对配置的所述回落小区进行测量，并将测量结果发送给eNB；The mobile terminal receives the fallback cell configuration information, measures the configured fallback cell, and sends the measurement result to the eNB; eNB对所述测量结果进行处理，以获得最佳回落小区；所述最佳回落小区为允许接入且信号最佳的所述回落小区；The eNB processes the measurement results to obtain the best fallback cell; the best fallback cell is the fallback cell that allows access and has the best signal; eNB指示移动终端回落到所述最佳回落小区；The eNB instructs the mobile terminal to fall back to the best fallback cell; 移动终端根据指示回落到所述最佳回落小区；The mobile terminal falls back to the best fallback cell according to the instruction; 其中，所述eNB对所述测量结果进行处理，以获得最佳回落小区包括：Wherein, the eNB processes the measurement results to obtain the best fallback cell including: eNB提取所述测量结果中信号最好的n个所述回落小区的频点信息；其中，n小于配置的所述回落小区的数量；The eNB extracts the frequency point information of the n fallback cells with the best signals in the measurement result; wherein, n is less than the configured number of the fallback cells; eNB通过MME向MSC发送信号最好的n个所述回落小区是否能够接入的确认请求；The eNB sends a confirmation request to the MSC through the MME to confirm whether the n fallback cells with the best signal can be accessed; MSC根据信号最好的n个所述回落小区的状态进行回应；The MSC responds according to the state of the n described fallback cells with the best signal; eNB接收MSC的回应结果，并根据回应结果选择允许接入且信号最好的所述回落小区作为所述最佳回落小区。The eNB receives the response result from the MSC, and selects the fallback cell that allows access and has the best signal as the best fallback cell according to the response result. 2.根据权利要求1所述的移动终端回落小区的方法，其特征在于，移动终端是4G多模卡，在所述移动终端接收MME发送的寻呼请求，并向MME发送扩展业务请求之前还包括：2. The method for returning a mobile terminal to a cell according to claim 1, wherein the mobile terminal is a 4G multi-mode card, and before the mobile terminal receives a paging request sent by the MME, and sends an extended service request to the MME, the include: 移动终端进行4G多模卡的联合附着。The mobile terminal performs joint attachment of the 4G multimode card. 3.根据权利要求2所述的移动终端回落小区的方法，其特征在于，所述移动终端进行4G多模卡的联合附着包括：3. The method for a mobile terminal to fall back to a cell according to claim 2, wherein the mobile terminal performing joint attachment of a 4G multi-mode card comprises: 移动终端4G多模卡向MME发送附着请求消息；The mobile terminal 4G multi-mode card sends an attach request message to the MME; MME发送SGs位置更新请求消息给对应的VLR；所述SGs位置更新请求消息包括移动终端的LAI、4G多模卡的IMSI、MME信息和位置更新类型；The MME sends the SGs location update request message to the corresponding VLR; the SGs location update request message includes the LAI of the mobile terminal, the IMSI of the 4G multimode card, the MME information and the location update type; VLR存储所述MME信息，并创建与MME下4G多模卡的SGs关联；The VLR stores the MME information and creates associations with the SGs of the 4G multimode card under the MME; VLR根据所述LAI和4G多模卡的IMSI，发起到HLR的4G多模卡位置更新流程，并在更新完成后返回确认信息给MME；According to the IMSI of the LAI and the 4G multi-mode card, the VLR initiates the location update process of the 4G multi-mode card to the HLR, and returns confirmation information to the MME after the update is completed; MME发送附着完成消息给移动终端，完成4G多模卡的联合附着。The MME sends an attach complete message to the mobile terminal to complete the joint attachment of the 4G multi-mode card. 4.根据权利要求3所述的移动终端回落小区的方法，其特征在于，移动终端回落小区之后还包括：4. The method for the mobile terminal to fall back to the cell according to claim 3, wherein after the mobile terminal falls back to the cell, the method further comprises: 判断移动终端回落小区LAI与4G多模卡联合附着时的小区LAI是否一致；Determine whether the cell LAI when the mobile terminal falls back to the cell LAI and the 4G multi-mode card joint attachment is consistent; 如果否，移动终端进行位置更新。If not, the mobile terminal performs location update. 5.一种移动终端，其特征在于，包括：5. A mobile terminal, characterized in that, comprising: 回落请求模块，用于接收MME发送的寻呼请求，并向MME发送扩展业务请求；The fallback request module is used to receive the paging request sent by the MME, and send the extended service request to the MME; 第一接收模块，用于接收eNB发送的回落小区配置信息；a first receiving module, configured to receive the fallback cell configuration information sent by the eNB; 测量模块，用于对配置的所述回落小区进行测量，并将测量结果发送给eNB；a measurement module, configured to measure the configured fallback cell, and send the measurement result to the eNB; 处理模块，用于对所述测量结果进行处理，以获得最佳回落小区；所述最佳回落小区为允许接入且信号最佳的所述回落小区；a processing module, configured to process the measurement result to obtain the best fallback cell; the best fallback cell is the fallback cell that allows access and has the best signal; 第二接收模块，用于接收eNB发送的回落到所述最佳回落小区的指示；a second receiving module, configured to receive an indication of falling back to the best fallback cell sent by the eNB; 回落模块，用于根据指示回落到所述最佳回落小区；A fallback module, configured to fall back to the best fallback cell according to the instruction; 其中，所述处理模块包括：Wherein, the processing module includes: 提取单元，用于提取所述测量结果中信号最好的n个所述回落小区的频点信息；其中，n小于配置的所述回落小区的数量；an extraction unit, configured to extract the frequency point information of the n fallback cells with the best signals in the measurement result; wherein n is less than the configured number of fallback cells; 请求单元，用于通过MME向MSC发送信号最好的n个所述回落小区是否能够接入的确认请求；a requesting unit, configured to send a confirmation request to the MSC through the MME whether the n described fallback cells with the best signal can be accessed; 接收选择单元，用于接收MSC的回应结果，并根据回应结果选择允许接入且信号最好的所述回落小区作为所述最佳回落小区。The receiving and selecting unit is configured to receive a response result from the MSC, and select the fallback cell that allows access and has the best signal as the best fallback cell according to the response result. 6.根据权利要求5所述的移动终端，其特征在于，还包括联合附着模块，用于进行4G多模卡的联合附着。6 . The mobile terminal according to claim 5 , further comprising a joint attachment module for performing joint attachment of the 4G multi-mode card. 7 . 7.根据权利要求6所述的移动终端，其特征在于，还包括判断模块，用于在移动终端回落小区后判断其回落小区LAI与4G多模卡联合附着时的小区LAI是否一致；7. The mobile terminal according to claim 6, further comprising a judging module for judging whether the cell LAI of the falling cell LAI and the 4G multimode card joint attachment is consistent after the mobile terminal falls back to the cell; 位置更新模块，用于在所述判断模块的判断结果为否时，更新移动终端的位置。A location update module, configured to update the location of the mobile terminal when the determination result of the determination module is no.
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