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

Abstract

The invention discloses a method for configuring a fallback frequency point. According to the obtained user signaling, each fallback Global System for Mobile Communication (GSM) cell corresponding to the originating Long Term Evolution (LTE) cell is determined; The broadcast control channel (BCCH) of the LTE cell is configured as a frequency point in the fallback frequency point group of the LTE cell. The invention also discloses a device for falling back frequency point configuration.

Description

A fallback frequency point configuration method and device

technical field

The present invention relates to a voice communication technology in mobile communication, and in particular, to a method and a device for the configuration of fallback frequency points.

Background technique

The Circuit Switched Fallback (CSFB) mechanism defined by the 3rd Generation Partnership Project (3GPP) ensures that the user is registered in the Evolved Packet System (EPS, Evolved Packet System) and the traditional circuit domain network at the same time. In the case of voice service, the EPS instructs the user to fall back to the circuit area network and then initiate a voice call. To implement CSFB services, two key technologies, fallback and return, need to be solved. The two parameters that are mainly concerned are fallback delay, also called connection delay, and return delay, also called unreachable time.

The main processes of CSFB include: 1. Network selection and residency at startup: preferentially reside on the Long Term Evolution (LTE, Long TermEvolution) network, that is, the terminal is powered on, and is connected to the LTE network and the second generation (2G, 2nd Generation)/third generation ( 3G, 3rd Generation) network circuit domain joint registration, to ensure that users are registered in EPS and Global System for Mobile Communication (GSM, Global System for Mobile Communication) circuit domain networks at the same time, and finally reside in the LTE network, this process is the basic flow of CSFB; two 3. Call request fallback: the network instructs the terminal to reselect back to the 2/3G network, and the circuit area network provides voice services; 3. Return after the call: the terminal returns to the LTE network to camp after completing the call.

The fallback scheme of CSFB involves the choice of two fallback mechanisms, namely, R8 redirection and R9 redirection. The process of R8 redirection is: an evolved base station (eNB, evolved Node B) issues a radio resource control release (RRC release, The Radio Resource Control release) message carries the frequency information of the target cell, and the terminal needs to read the GSM cell system information after falling back; the process of R9 redirection is: the eNB sends the RRC Release message carrying the frequency information and cell system information of the target cell, and the terminal falls back. This saves time by eliminating the need to read GSM system messages later. Whether it is the R8 or the R9 solution, the frequency points of the 2G neighboring cell should be configured on the fourth generation (4G, 4th Generation) cell.

Using the existing frequency point configuration technology, there is a problem of poor accuracy, especially in high-traffic areas, and it is necessary to periodically check the accuracy of the configured frequency points; the wireless network situation is relatively complex, even through simulation planning, test data, etc. As a basis for planning to fall back frequency points, as the optimization progresses, such as the adjustment of azimuth, down-tilt, and power, the coverage will change; the field engineer needs to add as many frequency points as possible in order to reduce the probability of missing assignments. However, this will lead to The workload increases and the fallback delay increases.

How to reduce the tedious artificial planning, improve the accuracy, and shorten the fallback delay is an urgent problem to be solved in the fallback frequency configuration.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present invention expect 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 above object, the technical scheme of the present invention is achieved in this way:

An embodiment of the present invention provides a method for configuring a fallback frequency point, and the method includes:

Determine each fallback GSM cell corresponding to the originating LTE cell according to the acquired user signaling;

The Broadcast Control Channel (BCCH, Broadcast Control Channel) of each fallback GSM cell is configured as a frequency point in the fallback frequency point group of the LTE cell.

In the above solution, determining each fallback GSM cell corresponding to the originating LTE cell according to the acquired user signaling includes:

Obtain the Mobility management entity-Temporary Mobile SubscriberIdentity (M-TMSI, Mobility management entity-Temporary Mobile SubscriberIdentity) in the Extended Service Request (Extended service request) signaling;

determining, according to the M-TMSI, attach accept (Attach accept)/location update (Location update) signaling corresponding to the M-TMSI;

Acquire the Temporary Mobile Subscriber Identity (TMSI, Temporary Mobile Subscriber Identity) in the Attach accept/Location update signaling, and determine the connection management service request (CMservice request) signaling corresponding to the TMSI;

According to the CM service request signaling, it is determined to fall back to the GSM cell.

In the above solution, before the acquired user signaling, the method further includes:

The user signaling tracking is directly performed at the deployment configuration frequency or the currently configured frequency; or,

Add all the main BCCH frequency points on the existing network, and enable the user signaling tracking.

In the above scheme, the method also includes:

Statistics of the fallback percentages of the corresponding fallback GSM cells in the LTE cell;

According to the fallback ratio, the priority of the BCCH of each fallback GSM cell is determined.

An embodiment of the present invention further provides an apparatus for configuring a fallback frequency point. The apparatus includes: an acquisition module and a configuration module; wherein,

The acquiring module is configured to determine, according to the acquired user signaling, each fallback GSM cell corresponding to the originating LTE cell;

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 above scheme, the acquisition module is specifically used for:

Obtain the M-TMSI in the Extended service request signaling;

According to the M-TMSI, determine the Attach accept/Location update signaling corresponding to the M-TMSI;

Acquire the temporary subscriber identity TMSI in the Attach accept/Location update signaling, and determine the CM service request signaling corresponding to the TMSI;

According to the CM service request signaling, it is determined to fall back to the GSM cell.

In the above scheme, the acquisition module is also used for:

The user signaling tracking is directly performed at the deployment configuration frequency or the currently configured frequency; or,

Add all the main BCCH frequency points on the existing network, and enable the user signaling tracking.

In the above scheme, the configuration module is also used for:

Statistics of the fallback percentages of the corresponding fallback GSM cells in the LTE cell;

According to the fallback ratio, the priority of the BCCH of each fallback GSM cell is determined.

In the method and device for configuring a fallback frequency point provided by the embodiment of the present invention, each fallback GSM cell corresponding to the originating LTE cell is determined according to the obtained user signaling; the BCCH of each fallback GSM cell is configured as the LTE cell The frequency points in the fallback frequency point group; the frequency points are added to the fallback frequency point group in a targeted manner to reduce the subjective addition of frequency points by maintenance personnel. In this way, the accuracy of the fallback frequency points is improved, and the number of fallback frequency points is reduced; by reducing the number of frequency points, the fallback delay is further shortened.

Description of drawings

FIG. 1 is a schematic flowchart 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 an apparatus for falling back frequency point configuration according to an embodiment of the present invention.

Detailed ways

In this embodiment of the present invention, each fallback GSM cell corresponding to the originating LTE cell is determined according to the acquired user signaling; the BCCH of each fallback GSM cell is configured as a frequency point in the LTE cell fallback frequency point group.

The present invention will be described in further detail below in conjunction with the embodiments.

A method for configuring a fallback frequency point provided by an embodiment of the present invention, as shown in FIG. 1 , the method includes:

Step 101: Determine each fallback GSM cell corresponding to the originating LTE cell according to the acquired user signaling;

Specifically, acquire the M-TMSI in the Extended service request signaling; determine the Attach accept/Location update signaling corresponding to the M-TMSI according to the M-TMSI; acquire the Attach accept/Location update signaling in the According to the TMSI, determine the CM service request corresponding to the TMSI; determine the originating LTE cell according to the Extended service request signaling; determine the fallback GSM cell according to the CM service request signaling.

The Attach accept/Location update signaling is a signaling message received when the terminal is jointly attached or the location is updated, and two contents to be intercepted from the Attach accept/Location update signaling are: one One is M-TMSI and one is TMSI. The M-TMSI is the unique identifier of the terminal in the LTE network, which is composed of 4 bytes and 32 bits, and the TMSI is used to jointly attach the unique identifier to the GSM. It is also composed of 4 bytes and 32 bits; the Extended service request signaling is a signaling message that the terminal will send at the moment when the terminal initiates a voice call on the LTE network, and the Extended service request signaling includes the previous joint attachment or M-TMSI allocated to the terminal when the location is updated. Because the M-TMSI is also intercepted for this signaling; the CM service reques signaling, after initiating a voice call for the terminal, will return to the GSM network, read the system message in the GSM network and initiate a call, and send the message during the process of initiating a call. Signaling message message, and this message will include the TMSI sent by the terminal to the terminal when the terminal is jointly attached to the LTE network or the location is updated. Therefore, the TMSI should be intercepted for this signaling.

When the terminal initiates a voice call on the LTE network, the network can determine the calling LTE cell, through the unique correspondence between the M-TMSI and the TMSI in the Attachaccept/Location update, combined with the M-TMSI in the Extended servicerequest signaling, can determine Corresponding to the CM service request signaling, the GSM cell to which the terminal falls back can be determined through the CM service request signaling. In this way, in the whole process, it is determined from which LTE cell to which GSM cell each terminal falls back, and the fallback ratios of each LTE cell corresponding to several GSM cells can be calculated.

Step 102: 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 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;

Further, since the LTE cell can correspond to multiple fallback GSM cells, the fallback ratio of each fallback GSM cell corresponding to the LTE cell can be counted; according to the fallback ratio, the BCCH of each fallback GSM cell is determined. priority.

The method provided by the embodiment of the present invention further includes: before enabling signaling tracking to obtain user signaling, the following operations may be performed according to requirements: adding 31 frequency points to each frequency point group, that is, adding all the main BCCH frequency points of the existing network, and enabling Signaling tracking, or, without adding any frequency points, directly perform signaling tracking with the deployment-configured frequency points or the currently-configured frequency points. If all the main BCCH frequencies on the existing network are added and signaling tracking is enabled, user signaling can be acquired more comprehensively and accurately.

By adopting the technical solution of the present invention, the fallback frequency points can be configured more accurately, and some invalid frequency points can be avoided from being configured, thereby reducing the number of frequency points in the group; the reduction of the number of frequency points can shorten the fallback time delay, and the specific effects are as follows: shown in Table 1.

Table 1

A fallback frequency point configuration device provided by an embodiment of the present invention, as shown in FIG. 2 , the device includes: an acquisition module 21 and a configuration module 22 , wherein,

The obtaining module 21 is configured to determine, according to the obtained user signaling, each fallback GSM cell corresponding to the calling LTE cell;

Specifically, the acquiring module 21 acquires the M-TMSI in the Extended service request signaling; determines the Attach accept/Location update signaling corresponding to the M-TMSI according to the M-TMSI; acquires the Attach accept/Location update signaling According to the TMSI in the command, determine the CM service request signaling corresponding to the TMSI; determine the originating LTE cell according to the Extended service request signaling; determine the fallback GSM cell according to the CM service request signaling.

The Attach accept/Location update signaling is a signaling message received when the terminal is jointly attached or the location is updated, and two contents to be intercepted from the Attach accept/Location update signaling are: one One is M-TMSI and one is TMSI. The M-TMSI is the unique identifier of the terminal in the LTE network, which is composed of 4 bytes and 32 bits, and the TMSI is used to jointly attach the unique identifier to the GSM. It is also composed of 4 bytes and 32 bits; the Extended service request signaling is a signaling message that the terminal will send at the moment when the terminal initiates a voice call on the LTE network, and the Extended service request signaling includes the previous joint attachment or M-TMSI allocated to the terminal when the location is updated. Because the M-TMSI is also intercepted for this signaling; the CM service reques signaling, after initiating a voice call for the terminal, will return to the GSM network, read the system message in the GSM network and initiate a call, and send the message during the process of initiating a call. Signaling message message, and this message will include the TMSI sent by the terminal to the terminal when the terminal is jointly attached to the LTE network or the location is updated. Therefore, the TMSI should be intercepted for this signaling.

When the terminal initiates a voice call on the LTE network, the network can determine the calling LTE cell. Through the unique correspondence between the M-TMSI and the TMSI in the Attachaccept/Location update, combined with the M-TMSI in the Extended servicerequest signaling, the corresponding The CM service request signaling, the GSM cell to which the terminal falls back can be determined through the CM service request signaling. In this way, in the whole process, it is determined from which LTE cell to which GSM cell each terminal falls back, and the fallback ratios of each LTE cell corresponding to several GSM cells 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 has been determined by the acquisition module 21; here, the configuration 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;

Further, since the LTE cell can correspond to multiple fallback GSM cells, the fallback ratio of each fallback GSM cell corresponding to the LTE cell can be counted; according to the fallback ratio, the BCCH of each fallback GSM cell is determined. priority.

The acquisition module 21, before enabling signaling tracking to acquire user signaling, can perform the following operations according to requirements: add 31 frequency points to each frequency point group, that is, add all the main BCCH frequency points of the existing network, enable signaling tracking, Alternatively, do not add any frequency points, and directly perform signaling tracking with the deployment configuration frequency points or the currently configured frequency points. If all the main BCCH frequencies on the existing network are added and signaling tracking is enabled, user signaling can be acquired more comprehensively and accurately.

By adopting the technical solution of the present invention, the fallback frequency points can be configured more accurately, and some invalid frequency points can be avoided from being configured, thereby reducing the number of frequency points in the group; the reduction of the number of frequency points can shorten the fallback time delay, and the specific effects are as follows: shown in Table 1.

In practical applications, the acquisition module 21 and the configuration module 22 can be implemented by a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA) of a background server.

The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the invention.

Claims (6)

1. A method for configuring a fallback frequency point, wherein the method comprises: Determine the Attach accept/Locationupdate signaling corresponding to the M-TMSI according to the obtained mobility management entity temporary user identity M-TMSI in the Extended service request signaling; Determine the connection management service request CM service request signaling corresponding to the temporary subscriber identity TMSI in the Attach accept/Location update signaling; According to the CM service request signaling, determine each fallback GSM cell corresponding to the originating long-term evolution LTE cell; The broadcast control channel BCCH of each fallback GSM cell is configured as a frequency point in the fallback frequency point group of the LTE cell. 2. The method according to claim 1, wherein before the acquired user signaling, the method further comprises: The user signaling tracking is directly performed at the deployment configuration frequency or the currently configured frequency; or, Add all the main BCCH frequency points on the existing network, and enable the user signaling tracking. 3. The method according to claim 1 or 2, wherein the method further comprises: Statistics of the fallback percentages of the corresponding fallback GSM cells in the LTE cell; According to the fallback ratio, the priority of the BCCH of each fallback GSM cell is determined. 4. A device for buckling frequency point configuration, characterized in that the device comprises: an acquisition module and a configuration module; wherein, The acquiring module is configured to determine the Attach accept/Location update signaling corresponding to the M-TMSI according to the M-TMSI in the acquired Extended service request signaling; determine the Attach accept/Location update signaling corresponding to the M-TMSI; The CM service request signaling corresponding to the temporary user identity TMSI; according to the CM service request signaling, determine each fallback GSM cell corresponding to the originating LTE cell; 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 device according to claim 4, wherein the acquisition module is further used for: The user signaling tracking is directly performed at the deployment configuration frequency or the currently configured frequency; or, Add all the main BCCH frequency points on the existing network, and enable the user signaling tracking. 6. The device according to claim 4 or 5, wherein the configuration module is further configured to: Statistics of the fallback percentages of the corresponding fallback GSM cells in the LTE cell; According to the fallback ratio, the priority of the BCCH of each fallback GSM cell is determined.

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