CN107018510B - Fallback frequency point configuration method and device - Google Patents

Fallback frequency point configuration method and device Download PDF

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CN107018510B
CN107018510B CN201610056020.XA CN201610056020A CN107018510B CN 107018510 B CN107018510 B CN 107018510B CN 201610056020 A CN201610056020 A CN 201610056020A CN 107018510 B CN107018510 B CN 107018510B
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fallback
signaling
frequency point
tmsi
determining
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CN107018510A (en
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白羽
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China Mobile Group Inner Mongolia Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • 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
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a method for configuring fallback frequency points, which comprises the steps of determining each fallback global system for mobile communications (GSM) cell corresponding to a Long Term Evolution (LTE) cell according to an acquired user signaling; and configuring the Broadcast Control Channel (BCCH) of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell. The invention also discloses a device for configuring the fallback frequency point.

Description

Fallback frequency point configuration method and device
Technical Field
The present invention relates to voice communication technologies in mobile communications, and in particular, to a method and an apparatus for configuring fallback frequency points.
Background
A Circuit Switched Fallback mechanism (CSFB) defined by the third Generation Partnership Project (3 GPP) ensures that a user is registered in an Evolved Packet System (EPS) and a conventional Circuit Switched network at the same time, and when the user initiates a voice service, the EPS instructs the user to fall back to the Circuit Switched network and then to initiate a voice call. Two key technologies of fallback and return need to be solved for realizing the CSFB service, and two main parameters of concern are fallback delay, also called connection delay, and return delay, also called unreachable time.
The CSFB main process comprises the following steps: firstly, starting up, selecting a network and residing: the method includes the steps that the terminal preferentially resides in a Long Term Evolution (LTE) network, namely, the terminal is started up, and is jointly registered in circuit domains of the LTE network and a second Generation (2G, 2nd Generation)/third Generation (3G, 3rd Generation) network, so that a user is ensured to be simultaneously registered in an EPS and a Global System for Mobile Communication (GSM) circuit domain network, and finally resides in the LTE network, and the process is a CSFB basic flow; II, call request fallback: the network instructs the terminal to reselect back to the 2/3G network, and the circuit domain network provides voice service; thirdly, returning after the call is ended: and the terminal returns to the LTE network to reside after finishing the call.
The fallback scheme for CSFB involves the selection of two fallback mechanisms, R8 redirection and R9 redirection; wherein, the flow of R8 redirection is: an evolved Node B (eNB) issues a Radio Resource Control release (RRC release) message carrying target cell frequency point information, and a GSM cell system message needs to be read after a terminal returns; the flow of R9 redirection is: the eNB issues an RRC Release message carrying the frequency point information of the target cell and the cell system message, and the terminal does not need to read the GSM system message after falling back, so that the time is saved. In both the R8 and R9 schemes, frequency points of 2G neighboring cells are configured in a fourth Generation (4G, 4th Generation) cell.
The problem of poor accuracy exists by adopting the existing frequency point configuration technology, particularly in a high-traffic area, and the accuracy of the configured frequency point needs to be checked in stages; the wireless network condition is complex, even though the fallback frequency point is planned according to simulation planning, test data and the like, the coverage changes along with the optimization, such as the adjustment of azimuth angles, downward inclination angles and power; in order to reduce the probability of missing distribution, a field engineer needs to add frequency points as much as possible, but the workload and the fall-back delay are increased.
How to reduce the tedious manual planning, improve the accuracy, shorten the time delay of the fall-back is the problem to be solved urgently in the configuration of the fall-back frequency point.
Disclosure of Invention
In view of this, embodiments of the present invention are expected to provide a fallback frequency point configuration method and device, which can reduce tedious manual planning, improve accuracy, and shorten fallback delay.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a method for configuring fallback frequency points, which comprises the following steps:
determining each fallback GSM cell corresponding to the starting call LTE cell according to the acquired user signaling;
configuring a Broadcast Control Channel (BCCH) of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell.
In the foregoing solution, the determining, according to the obtained user signaling, each fallback GSM cell corresponding to the originating LTE cell includes:
acquiring a Mobile management entity Temporary user identity (M-TMSI) in an Extended service request (Extended service request) signaling;
determining an Attach accept (Attach accept)/Location update (Location update) signaling corresponding to the M-TMSI according to the M-TMSI;
acquiring a Temporary user Identity (TMSI) in the Attach accept/Location update signaling, and determining a connection management service request (CMservice request) signaling corresponding to the TMSI;
and determining a fallback GSM cell according to the CM service request signaling.
In the foregoing solution, before the obtaining the user signaling, the method further includes:
directly tracking the user signaling by using an open configuration frequency point or a current configuration frequency point; or the like, or, alternatively,
and adding all the main BCCH frequency points of the current network, and starting the user signaling tracking.
In the above scheme, the method further comprises:
counting the fallback percentage of each corresponding fallback GSM cell in the LTE cell;
and determining the priority of the BCCH of each fallback GSM cell according to the fallback percentage.
The embodiment of the invention also provides a device for configuring the fallback frequency point, which comprises the following components: the device comprises an acquisition module and a configuration module; wherein the content of the first and second substances,
the acquisition module is used for determining each fallback GSM cell corresponding to the starting call LTE cell according to the acquired user signaling;
the configuration module is configured to configure the BCCH of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell.
In the foregoing scheme, the obtaining module is specifically configured to:
acquiring M-TMSI in Extended service request signaling;
determining an Attach accept/Location update signaling corresponding to the M-TMSI according to the M-TMSI;
acquiring a temporary user identifier (TMSI) in the Attach accept/Location update signaling, and determining a CM service request signaling corresponding to the TMSI;
and determining a fallback GSM cell according to the CM service request signaling.
In the foregoing solution, the obtaining module is further configured to:
directly tracking the user signaling by using an open configuration frequency point or a current configuration frequency point; or the like, or, alternatively,
and adding all the main BCCH frequency points of the current network, and starting the user signaling tracking.
In the foregoing solution, the configuration module is further configured to:
counting the fallback percentage of each corresponding fallback GSM cell in the LTE cell;
and determining the priority of the BCCH of each fallback GSM cell according to the fallback percentage.
According to the configuration method and device of the fallback frequency point, provided by the embodiment of the invention, each fallback GSM cell corresponding to the LTE cell is determined according to the acquired user signaling; configuring the BCCH of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell; and adding frequency points to the fallback frequency point group in a targeted manner, and reducing the frequency points added by maintainers subjectively. Therefore, the accuracy of the fallback frequency points is improved, and the number of the fallback frequency points is reduced; by reducing the number of frequency points, the fall-back delay is further shortened.
Drawings
Fig. 1 is a schematic flow chart of a method for configuring a fallback frequency point according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a device for configuring fallback frequency points according to an embodiment of the present invention.
Detailed Description
In the embodiment of the invention, each fallback GSM cell corresponding to the starting call LTE cell is determined according to the acquired user signaling; and configuring the BCCH of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell.
The present invention will be described in further detail with reference to examples.
As shown in fig. 1, a method for configuring a fallback frequency point according to an embodiment of the present invention includes:
step 101: determining each fallback GSM cell corresponding to the starting call LTE cell according to the acquired user signaling;
specifically, obtaining M-TMSI in Extended service request signaling; determining an Attach accept/Location update signaling corresponding to the M-TMSI according to the M-TMSI; acquiring TMSI in the Attach accept/Location update signaling, and determining a CM service request corresponding to the TMSI; determining an LTE cell to be called according to the Extended service request signaling; and determining a fallback GSM cell according to the CM service request signaling.
The Attach accept/Location update signaling may include two contents to be intercepted from the Attach accept/Location update signaling, one is M-TMSI, and the other is TMSI, for a signaling message received during terminal joint attachment or Location update. The M-TMSI is a unique identifier of a terminal in an LTE network, is composed of 32 bits of 4 bytes, and is used for jointly attaching to a unique identifier of a GSM. Also consists of 4 bytes of 32 bits; the Extended service request signaling is a signaling message which is sent by the terminal at the moment when the LTE network initiates a voice call, and the Extended service request signaling comprises M-TMSI (M-TMSI) allocated to the terminal during previous joint attachment or position updating. Since the M-TMSI is also intercepted for this signaling; the CM service requests signaling returns to the GSM network after initiating a voice call for the terminal, reads a system message and initiates a call in the GSM network, and the signaling message is sent in the process of initiating the call and contains TMSI sent to the terminal when the terminal is jointly attached to the LTE network or the position is updated. The TMSI is intercepted for this signaling.
When a terminal initiates a voice call in an LTE network, the network can determine an LTE cell for initiating the call, and can determine the corresponding CM service requests signaling by combining the unique correspondence between M-TMSI and TMSI in the Attachcept/Location update and the M-TMSI in the Extended service requests signaling, and can determine the GSM cell to which the terminal falls back by the CM service requests signaling. Thus, the whole process determines from which LTE cell each terminal falls back to which GSM cell, and the fall-back ratio of several GSM cells corresponding to each LTE cell can be calculated.
Step 102: configuring the BCCH of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell;
each fallback GSM cell corresponding to the LTE cell that has been determined in step 101; here, the BCCH of each fallback GSM cell may be configured as a frequency point in the fallback frequency point group of the LTE cell;
furthermore, since the LTE cell may correspond to a plurality of fallback GSM cells, the fallback percentage of each corresponding fallback GSM cell in the LTE cell may be counted; and determining the priority of the BCCH of each fallback GSM cell according to the fallback percentage.
The method provided by the embodiment of the invention further comprises the following steps: before starting signaling tracking to acquire user signaling, the following operations can be carried out according to requirements: adding 31 frequency points to each frequency point group, namely adding all the existing network main BCCH frequency points, and starting signaling tracking, or not adding any frequency point, and directly carrying out signaling tracking by using the open configuration frequency point or the current configuration frequency point. If the main BCCH frequency points of the current network are all added and the signaling tracking is started, the user signaling can be more comprehensively and accurately acquired.
By adopting the technical scheme of the invention, the fallback frequency points can be configured more accurately, and some invalid frequency points can be prevented from being configured, thereby reducing the number of frequency points in the group; the reduction of the number of frequency points can shorten the fall-back delay, and the specific effect is shown in table 1.
Figure BDA0000916218340000061
TABLE 1
As shown in fig. 2, a fallback frequency point configuration device provided in an embodiment of the present invention includes: an acquisition module 21, a configuration module 22, wherein,
the acquiring module 21 is configured to determine, according to the acquired user signaling, each fallback GSM cell corresponding to the originating LTE cell;
specifically, the obtaining module 21 obtains an M-TMSI in an Extended service request signaling; determining an Attach accept/Location update signaling corresponding to the M-TMSI according to the M-TMSI; acquiring TMSI in the Attachcept/Location update signaling, and determining CM service request signaling corresponding to the TMSI; determining an LTE cell to be called according to the Extended service request signaling; and determining a fallback GSM cell according to the CM servicerequest signaling.
The Attach accept/Location update signaling may include two contents to be intercepted from the Attach accept/Location update signaling, one is M-TMSI, and the other is TMSI, for a signaling message received during terminal joint attachment or Location update. The M-TMSI is a unique identifier of a terminal in an LTE network, is composed of 32 bits of 4 bytes, and is used for jointly attaching to a unique identifier of a GSM. Also consists of 4 bytes of 32 bits; the Extended service request signaling is a signaling message which is sent by the terminal at the moment when the LTE network initiates a voice call, and the Extended service request signaling comprises M-TMSI (M-TMSI) allocated to the terminal during previous joint attachment or position updating. Since the M-TMSI is also intercepted for this signaling; the CM service requests signaling returns to the GSM network after initiating a voice call for the terminal, reads a system message and initiates a call in the GSM network, and the signaling message is sent in the process of initiating the call and contains TMSI sent to the terminal when the terminal is jointly attached to the LTE network or the position is updated. The TMSI is intercepted for this signaling.
When the terminal initiates a voice call in the LTE network, the network can determine an LTE cell for initiating the call, the corresponding CM service requests signaling can be determined through the unique correspondence between the M-TMSI and the TMSI in the Attachcept/Location update and the M-TMSI in the Extended service requests signaling, and the GSM cell to which the terminal falls back can be determined through the CM service requests signaling. Thus, the whole process determines from which LTE cell each terminal falls back to which GSM cell, and the fall-back ratio of several GSM cells corresponding to each LTE cell can be calculated.
The configuration module 22 is configured to configure the BCCH of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell;
each fallback GSM cell corresponding to the LTE cell that has been determined by the obtaining module 21; here, the configuring module 22 may configure the BCCH of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell;
furthermore, since the LTE cell may correspond to a plurality of fallback GSM cells, the fallback percentage of each corresponding fallback GSM cell in the LTE cell may be counted; and determining the priority of the BCCH of each fallback GSM cell according to the fallback percentage.
The obtaining module 21, before starting signaling tracking to obtain the user signaling, may perform the following operations as required: adding 31 frequency points to each frequency point group, namely adding all the existing network main BCCH frequency points, and starting signaling tracking, or not adding any frequency point, and directly carrying out signaling tracking by using the open configuration frequency point or the current configuration frequency point. If the main BCCH frequency points of the current network are all added and the signaling tracking is started, the user signaling can be more comprehensively and accurately acquired.
By adopting the technical scheme of the invention, the fallback frequency points can be configured more accurately, and some invalid frequency points can be prevented from being configured, thereby reducing the number of frequency points in the group; the reduction of the number of frequency points can shorten the fall-back delay, and the specific effect is shown in table 1.
In practical applications, the obtaining module 21 and the configuring module 22 may be implemented by a Central Processing Unit (CPU), a microprocessor unit (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like of a background server.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (6)

1. A method for configuring fallback frequency points is characterized in that the method comprises the following steps:
determining an Attach acceptance Attach accept/location update signaling corresponding to an M-TMSI according to an obtained mobile management entity temporary user identifier (M-TMSI) in an Extended service request (Extended service request) signaling;
determining a connection management service request (CM service request) signaling corresponding to a temporary user identifier (TMSI) in the Attach accept/Location update signaling;
determining each fallback GSM cell corresponding to the LTE cell according to the CM service request signaling;
and configuring the broadcast control channel BCCH of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell.
2. The method of claim 1, wherein the obtained user signaling is preceded by:
directly tracking the user signaling by using an open configuration frequency point or a current configuration frequency point; or the like, or, alternatively,
and adding all the main BCCH frequency points of the current network, and starting the user signaling tracking.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
counting the fallback percentage of each corresponding fallback GSM cell in the LTE cell;
and determining the priority of the BCCH of each fallback GSM cell according to the fallback percentage.
4. An apparatus for fallback frequency point configuration, the apparatus comprising: the device comprises an acquisition module and a configuration module; wherein the content of the first and second substances,
the acquisition module is used for determining an Attach accept/Location update signaling corresponding to the M-TMSI according to the M-TMSI in the acquired Extended service request signaling; determining CM service request signaling corresponding to a temporary user identifier (TMSI) in the Attach accept/Location update signaling; determining each fallback GSM cell corresponding to the starting call LTE cell according to the CM service request signaling;
the configuration module is configured to configure the BCCH of each fallback GSM cell as a frequency point in the fallback frequency point group of the LTE cell.
5. The apparatus of claim 4, wherein the obtaining module is further configured to:
directly tracking the user signaling by using an open configuration frequency point or a current configuration frequency point; or the like, or, alternatively,
and adding all the main BCCH frequency points of the current network, and starting the user signaling tracking.
6. The apparatus of claim 4 or 5, wherein the configuration module is further configured to:
counting the fallback percentage of each corresponding fallback GSM cell in the LTE cell;
and determining the priority of the BCCH of each fallback GSM cell according to the fallback percentage.
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CN108966289B (en) * 2018-07-13 2022-04-12 中国联合网络通信有限公司新乡市分公司 Traffic distribution method and device
CN110337127A (en) * 2019-07-23 2019-10-15 中国联合网络通信集团有限公司 Circuit domain fallback method and its device
CN110475305B (en) * 2019-08-16 2021-09-24 中国联合网络通信集团有限公司 Neighbor cell configuration method, device, system and storage medium

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