CN111885714B - Paging method and paging device - Google Patents

Paging method and paging device Download PDF

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CN111885714B
CN111885714B CN202010935415.3A CN202010935415A CN111885714B CN 111885714 B CN111885714 B CN 111885714B CN 202010935415 A CN202010935415 A CN 202010935415A CN 111885714 B CN111885714 B CN 111885714B
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mobile terminal
information
rau
mme
cell
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CN111885714A (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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/24—Interfaces between hierarchically similar devices between backbone network devices

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

Abstract

The invention provides a paging method and a paging device, belongs to the technical field of communication, and can solve the problem that a mobile terminal can not be paged under certain existing conditions. The paging method of the invention comprises the following steps: after the mobile terminal cell falls back, when the LAI of the falling cell is different from the LAI in the combined attachment, the MSC deletes the LAU of the mobile terminal and deletes the SGs interface; when the mobile terminal establishes a call, the SGSN controls RAU on the mobile terminal; activating ISR is not included in the process of carrying out the RAU; and when the mobile terminal finishes the call and returns to the LTE network, the MSC updates the joint position of the mobile terminal and reestablishes the SGs interface.

Description

Paging method and paging device
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a paging method and a paging device.
Background
At present, after a cell falls back, if an LAI (Location Area Identification; location Area Identification) of a fallen-back cell is different from an LAI during joint attachment, an LAU (Location Area Update; location Area Update) is performed first, an MSC (Mobile Switching Center) receives the LAU, deletes an SGs interface, and after the Mobile terminal performs the LAU, the ISR is deactivated. Then the mobile terminal carries out RAU (Routing Area Update) while establishing conversation, SGSN (Serving GPRS Support Node) sends context request information to MME (Mobility Management Entity) after receiving RAU request, SGSN sends RAU receiving information to mobile terminal after receiving MME context response information, and ISR activation indication is contained. After the mobile terminal activates ISR, when the mobile terminal finishes the call and returns to the LTE network, if the returned cell is in TAI list during the association attachment, the mobile terminal will not perform TAU (Tracking Area Update), and when there is an incoming call, the paging request cannot be sent to the MME through the MSC.
Disclosure of Invention
The present invention is directed to at least solve one of the technical problems in the prior art, and provides a paging method capable of avoiding the phenomenon that a mobile terminal cannot be paged.
The technical scheme adopted for solving the technical problem of the invention is a paging method, which comprises the following steps:
after the mobile terminal cell falls back, when the LAI of the falling-back cell is different from the LAI in the combined attachment, the MSC deletes the LAU of the mobile terminal and deletes the SGs interface;
when the mobile terminal establishes a call, the SGSN controls RAU on the mobile terminal; activating ISR is not included in the process of carrying out the RAU;
and when the mobile terminal finishes the call and returns to the LTE network, the MSC updates the joint position of the mobile terminal and reestablishes the SGs interface.
Optionally, the step of the SGSN controlling RAU on the mobile terminal includes:
SGSN receives RAU request information sent by the mobile terminal, and then sends context request information to MME;
MME receives the context request information and then feeds back context response information to SGSN;
and the SGSN sends RAU acceptance information to the mobile terminal according to the context response information.
Further optionally, the RAU request information includes network capability information, and the network capability information does not include ISR capability.
Optionally, the paging method further includes a step of dropping back the cell of the mobile terminal, where the step of dropping back the cell of the mobile terminal includes:
the MME receives an extended service request sent by the mobile terminal;
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 cells, measures the configured fallback cells and sends the measurement results to the eNB;
the eNB determines a fallback cell according to the measurement result and sends fallback cell information to the mobile terminal;
and the mobile terminal falls back to the corresponding falling cell according to the falling cell information.
Optionally, the mobile terminal includes a 4G multi-mode card.
Further optionally, before the cell fallback of the mobile terminal, the method further includes: and the mobile terminal performs the joint attachment.
Further optionally, the step of performing joint attachment on the mobile terminal includes:
MME receives an attachment request message sent by a mobile terminal;
MME sends SGs location update request message to corresponding VLR according to the attachment request message; the SGs location update request message comprises LAI, IMSI, MME information and location update type of the mobile terminal;
VLR stores the MME information and establishes SGs association with the mobile terminal under the MME;
the VLR initiates a mobile terminal position updating process to the HLR according to the LAI and the IMSI of the mobile terminal, 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 mobile terminal.
Another technical solution to solve the technical problem of the present invention is a paging device, including:
the LAU updating module is used for deleting the LAU of the mobile terminal and the SGs interface by the MSC when the LAI of the fallback cell is different from the LAI in the combined attachment after the mobile terminal cell falls back;
the RAU updating module is used for controlling RAU of the mobile terminal by the SGSN when the mobile terminal establishes a call; activating ISR is not included in the process of carrying out the RAU;
and the TAU updating module is used for carrying out TAU on the mobile terminal by the MSC when the mobile terminal finishes the conversation and returns to the LTE network, and reestablishing the SGs interface.
Optionally, the RAU update module includes:
the SGSN is used for receiving RAU request information sent by the mobile terminal and then sending context request information to the MME; sending RAU acceptance information to the mobile terminal according to the context response information fed back by the MME;
and the MME is used for receiving the context request information and then feeding back context response information to the SGSN.
Drawings
Fig. 1 is a flowchart of a paging method according to embodiment 1 of the present invention;
fig. 2 is a flowchart of a paging method according to embodiment 2 of the present invention;
fig. 3 is a block diagram of a paging device according to embodiment 3 of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail with reference to the accompanying drawings and the detailed description below.
Example 1:
as shown in fig. 1, a typical CSFB (Circuit Switched Fallback) service flow mainly includes a joint attachment, a location update, a calling (MO) CSFB flow, a called (MT) CSFB flow, and a detach flow. The attachment procedure of the CSFB-enabled user is implemented based on a joint GPRS/IMSI attachment procedure. The multimode single-standby handheld terminal carries the indication of supporting the CSFB capability in an attachment request message sent to the MME. After receiving a joint attach request of a user, the MME derives VLR information of its related CS (Circuit Switched) domain while performing EPS (Evolved Packet System) attachment, and initiates a location update request to this VLR, and after receiving the location update request, the VLR marks the user as having performed EPS attachment and stores the IP address of the MME of the user, so that an SGs association between the VLR and the MME of the user is created in the VLR. Then, the MSC Server/VLR will perform CS domain location update and transfer the TMSI and LAI (location area identity) of the user to the MME, thereby establishing SGs association in the MME. And finally, the MME includes the TMSI, LAI and other information distributed to the user by the VLR in an attachment request acceptance message and sends the attachment request acceptance message to the UE, and the UE is indicated to have successful combined attachment. After the joint attachment is successful, the user with the CSFB capability can process the circuit domain service in the LTE network.
In the EPS system, in order to reduce air interface signaling between the UE and the core network, an ISR function is introduced. When this function is activated, UEs having both UTRAN/GERAN and E-UTRAN access functions may be registered to both the MME and the SGSN. In this way, when the UE moves under two different Access networks, the UE does not initiate a Routing Area Update (RAU) or a Tracking Area Update (TAU) of an inter RAT (Radio Access Technology). Thereby reducing unnecessary signaling.
At present, after a mobile terminal with ISR capability is powered on, a joint attachment is performed first, and at this time ISR is not activated. When an incoming call exists, the MSC sends a paging request to the MME, the MME sends the paging request to the mobile terminal, the mobile terminal sends an extended service request to the MME after receiving the paging request, and the MME indicates the mobile terminal to perform cell fallback. After the mobile terminal falls back in the cell, if the LAI of the fallen back cell is different from the LAI in the joint attachment, the LAU is performed first. When the MSC performs LAU, the SGs interface is deleted. In addition, in the prior art, the ISR is deactivated after the LAU is performed by the mobile terminal, and the ISR is still in an inactivated state because the ISR is not activated at this time. Then the mobile terminal will perform RAU while establishing the call, and carry ISR indication in the RAU process, so that the mobile terminal activates ISR. On this basis, when the mobile terminal finishes the call and returns to the LTE network, if the returned cell is in the TAI list during the joint attachment, the mobile terminal will not perform TAU, but because the MSC has deleted the SGs interface in the previous process, when there is an incoming call, the paging request cannot be sent to the MME through the MSC, resulting in that the mobile terminal cannot be paged.
Based on the above technical problem, as shown in fig. 1, the present embodiment provides a paging method, which includes:
s11, after the mobile terminal cell falls back, when the LAI of the falling cell is different from the LAI in the combined attachment, the MSC deletes the LAU of the mobile terminal and deletes the SGs interface.
S12, when the mobile terminal establishes a call, the SGSN controls RAU on the mobile terminal; in performing RAU, ISR activation is not included.
And S13, when the mobile terminal finishes the call and returns to the LTE network, the MSC updates the joint position of the mobile terminal and reestablishes the SGs interface.
In the paging method provided in this embodiment, when the LAI of the fallback cell is different from the LAI in the joint attachment, the MSC normally performs LAU to the mobile terminal and deletes the SGs interface. But does not activate ISR functionality during subsequent RAU. In addition, in the paging method provided in this embodiment, when the mobile terminal ends the call and returns to the LTE network, the MSC updates the joint location of the mobile terminal and reestablishes the SGs interface, thereby ensuring that the mobile terminal can be paged normally.
Example 2:
as shown in fig. 2, this embodiment provides a paging method, which is substantially the same as the paging method provided in embodiment 1, and can prevent the mobile terminal from being unable to be called due to ISR activation. Optionally, in this embodiment, the called mobile terminal includes a 4G multimode card.
The following describes the implementation details of the paging method in the present embodiment in detail, and the following is only for facilitating understanding of the implementation details of the present solution and is not necessary for implementing the present solution. The method can be applied to the paging process of the mobile terminal. Wherein, the mobile terminal can include: the smart phone may also be other devices capable of performing voice communication, such as a tablet computer, a smart watch, and the like, which are described above only by way of example, and other terminals capable of performing voice communication that are not described are within the scope of the present application. The method may include the following steps.
Optionally, after the mobile terminal is powered on, the step of S21 and the step of performing the joint attachment by the mobile terminal are performed first.
The step is to carry out 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 communicates by using the 3G network. After the 4G multi-mode card is attached, the call connection of the mobile terminal during the call can be realized.
Specifically, step S21 may include:
s211, MME receives the message of attaching request sent by mobile terminal.
S212, the MME sends a request message for updating the SGs position to a corresponding VLR (Visitor Location Register) according to the attachment request message.
The location update request may include parameters such as a new location area code, an identifier of the terminal, a name of the mobility management entity, and a local update type.
S213, VLR stores MME information and creates SGs associations with mobile terminals under the MME.
S214, the VLR initiates a mobile terminal position updating process to the HLR according to the LAI and the IMSI of the mobile terminal, and returns confirmation information to the MME after the updating is completed.
S215, the MME sends an attachment completion message to the mobile terminal to complete the joint attachment of the mobile terminal.
In this embodiment, before the mobile terminal performs a call, the method may further include step S22 of the mobile terminal performing cell drop.
Optionally, the step of the mobile terminal cell dropping includes:
s221, the MME receives the extended service request sent by the mobile terminal.
S222, the MME instructs the eNB to send the fallback cell configuration information to the mobile terminal.
The configuration information of the fallback cells comprises a plurality of configured fallback cells.
S223, the mobile terminal receives the configuration information of the fallback cell, measures the configured fallback cell, and sends the measurement result to the eNB.
S224, the eNB determines the fallback cell according to the measurement result and sends the information of the fallback cell to the mobile terminal.
Specifically, the eNB processes the measurement result to obtain the best fallback cell. The best fallback cell is the fallback cell which allows access and has the best signal.
In this step, the best fallback cell which allows access and has the best signal is screened from the numerous configured fallback cells, and the mobile terminal falls back to the best fallback cell, so that the situation that 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, and therefore the mobile terminal can successfully fall back, call can be smoothly established, and user experience is improved.
And S225, the mobile terminal falls back to the corresponding falling cell according to the falling cell information.
And S23, after the mobile terminal cell falls back, when the LAI of the falling cell is different from the LAI in the combined attachment, the MSC deletes the LAU of the mobile terminal and deletes the SGs interface.
S24, when the mobile terminal establishes a call, the SGSN controls RAU on the mobile terminal; the process of RAU does not involve activating ISR.
Optionally, in this step, the step of performing RAU specifically includes:
s241, the SGSN receives the RAU request information sent by the mobile terminal, and then sends the context request information to the MME.
In the RAU procedure, the mobile terminal sends an RAU request to the SGSN. Optionally, the RAU request information includes network capability information, and the network capability information does not include ISR capability.
In step S241, after receiving the RAU request, the SGSN determines that the network capability information of the mobile terminal does not include ISR capability, and sends context request information to the MME. It can be understood that, since the network capability information does not include ISR capability, the context request information sent by the SGSN also does not include ISR activation indication information.
S242, the MME receives the context request information, and then feeds back the context response information to the SGSN.
Specifically, in this step, after receiving the context request information of the SGSN, the MME determines that there is no ISR activation instruction information, and returns context response information to the SGSN. The context request information does not include the ISR activation indication information after the MME receives the context request information of the SGSN, the MME judges that the ISR activation indication information does not exist, the MME returns context response information to the SGSN, and the response information does not include the ISR activation indication information, so the context response information does not include the ISR activation indication information.
S243, SGSN sends RAU receiving information to mobile terminal according to context response information.
In this step, the RAU acceptance information includes an ISR deactivation instruction.
It can be understood that, since the RAU accept message includes ISR deactivation message, the mobile terminal does not activate ISR after receiving the RAU accept message.
And S25, when the mobile terminal finishes the call and returns to the LTE network, the MSC updates the joint position of the mobile terminal and reestablishes the SGs interface.
In this step, when the mobile terminal finishes the call and returns to the LTE network, the combined location update is performed, the TAU is performed, and the SGs interface is reestablished, thereby ensuring that the mobile terminal can be paged.
In the paging method provided in this embodiment, when the LAI of the fallback cell is different from the LAI in the joint attachment, the MSC normally performs the LAU to the mobile terminal and deletes the SGs interface. But does not activate ISR functionality during subsequent RAU. In addition, in the paging method provided in this embodiment, when the mobile terminal ends the call and returns to the LTE network, the MSC updates the joint location of the mobile terminal and reestablishes the SGs interface, thereby ensuring that the mobile terminal can be paged normally.
In the paging process provided by this embodiment, the ISR function does not need to be activated, and the call process and quality of the mobile terminal are not affected. And when the mobile terminal finishes the call and returns to the LTE network, the combined position of the mobile terminal is updated, so that the SGs interface is established, and the problem that in the prior art, because the mobile terminal activates ISR, the SGs interface is occupied, and if a cell returned by the mobile terminal is in the TAI list during combined attachment, TAU cannot be performed is avoided. Therefore, the technical problem that the paging request can not be transmitted when an incoming call exists is caused. In summary, the paging method provided in this embodiment solves the loophole in the existing paging method, ensures smooth paging of a mobile terminal, and can avoid the abnormal phenomenon that the mobile terminal cannot be paged due to ISR activation under certain conditions.
Example 3:
as shown in fig. 3, the present embodiment provides a paging device, which can be used to execute the paging method provided in embodiment 1 or embodiment 2. The paging device includes: LAU update module, RAU update module, TAU update module.
And the LAU updating module is used for deleting the SGs interface from the LAU of the mobile terminal by the MSC when the LAI of the fallback cell is different from the LAI in the combined attachment after the mobile terminal cell falls back.
The RAU updating module is used for controlling RAU of the mobile terminal by the SGSN when the mobile terminal establishes a call; in performing RAU, ISR activation is not included.
And the TAU updating module is used for carrying out TAU on the mobile terminal by the MSC when the mobile terminal finishes the conversation and returns to the LTE network, and reestablishing the SGs interface.
Optionally, in this embodiment, the RAU update module includes: SGSN and MME.
The SGSN is used for receiving RAU request information sent by the mobile terminal and then sending context request information to the MME; and sending RAU acceptance information to the mobile terminal according to the context response information fed back by the MME.
The MME is used for receiving the context request information and then feeding back the context response information to the SGSN.
In the paging device provided in this embodiment, when the LAI of the fallback cell is different from the LAI in the joint attachment, the MSC deletes the LAU of the mobile terminal normally and deletes the SGs interface. But does not activate ISR functionality during subsequent RAU. In addition, in the paging method provided in this embodiment, when the mobile terminal ends the call and returns to the LTE network, the MSC updates the joint location of the mobile terminal and reestablishes the SGs interface, thereby ensuring that the mobile terminal can be paged normally.
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 (6)

1. A method for paging, comprising:
after the mobile terminal cell falls back, when the LAI of the falling cell is different from the LAI in the combined attachment, the MSC deletes the LAU of the mobile terminal and deletes the SGs interface;
when the mobile terminal establishes a call, the SGSN controls RAU to the mobile terminal; activating ISR is not included in the process of carrying out the RAU;
when the mobile terminal finishes the call and returns to the LTE network, the MSC updates the joint position of the mobile terminal and reestablishes an SGs interface;
the step of the SGSN controlling RAU to the mobile terminal comprises:
SGSN receives RAU request information sent by the mobile terminal, and then sends context request information to MME; the RAU request information includes network capability information, the network capability information does not include ISR capability, and the context request information does not include ISR activation indication information;
the MME receives the context request information and then feeds back context response information to the SGSN, wherein the context response information does not contain ISR activation indication information;
and the SGSN sends RAU acceptance information to the mobile terminal according to the context response information, wherein the RAU acceptance information comprises ISR (idle mode signaling) deactivation information.
2. The paging method according to claim 1, further comprising a step of mobile terminal cell fallback, said step of mobile terminal cell fallback comprising:
the MME receives an extended service request sent by the mobile terminal;
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 cells, measures the configured fallback cells and sends the measurement results to the eNB;
the eNB determines a fallback cell according to the measurement result and sends fallback cell information to the mobile terminal;
and the mobile terminal falls back to the corresponding falling cell according to the falling cell information.
3. The paging method according to claim 1, characterized in that the mobile terminal comprises a 4G multimode card.
4. The paging method according to claim 3, characterized by, before the mobile terminal cell falls back, further comprising: and the mobile terminal performs the joint attachment.
5. The paging method according to claim 4, wherein said step of jointly attaching mobile terminals comprises:
MME receives an attachment request message sent by a mobile terminal;
the MME sends an SGs location updating request message to the corresponding VLR according to the attachment request message; the SGs location update request message comprises LAI, IMSI, MME information and location update type of the mobile terminal;
VLR stores the MME information and establishes SGs association with the mobile terminal under the MME;
the VLR initiates a mobile terminal position updating process to the HLR according to the LAI and the IMSI of the mobile terminal, 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 mobile terminal.
6. A paging device, comprising:
the LAU updating module is used for deleting the LAU of the mobile terminal and the SGs interface by the MSC when the LAI of the fallback cell is different from the LAI in the combined attachment after the mobile terminal cell falls back;
the RAU updating module is used for controlling RAU of the mobile terminal by the SGSN when the mobile terminal establishes a call; activating ISR is not included in the process of carrying out the RAU;
the TAU updating module is used for enabling the MSC to carry out TAU on the mobile terminal and reestablish the SGs interface when the mobile terminal finishes the conversation and returns to the LTE network;
the RAU update module includes:
the mobile terminal comprises an SGSN (service GPRS supporting node) and an MME (mobility management entity), wherein the SGSN is used for receiving RAU (RAU) request information sent by the mobile terminal and then sending context request information to the MME, the RAU request information comprises network capability information, the network capability information does not comprise ISR (inter-service signaling) capability, and the context request information does not comprise ISR activation indication information; sending RAU (radio access unit) acceptance information to the mobile terminal according to context response information fed back by the MME, wherein the context response information does not contain ISR (inter-service signaling) activation indication information, and the RAU acceptance information contains ISR deactivation information;
and the MME is used for receiving the context request information and then feeding back context response information to the SGSN.
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CN112911706B (en) * 2021-02-20 2023-02-17 中国联合网络通信集团有限公司 ISR (inter-service radio) deactivation method, data service paging method, MSC (mobile switching center) and SGW (serving gateway)
CN113676890B (en) * 2021-08-24 2023-03-24 中国联合网络通信集团有限公司 Paging method and mobile switching center MSC
CN113676975B (en) * 2021-09-27 2022-08-26 中国联合网络通信集团有限公司 Communication method, MME, MSC and communication system
CN113949997B (en) * 2021-10-21 2023-07-18 中国联合网络通信集团有限公司 Active paging method and memory controller

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