WO2008061459A1

WO2008061459A1 - A location updating method and system

Info

Publication number: WO2008061459A1
Application number: PCT/CN2007/070327
Authority: WO
Inventors: Zhengwei Wang; Xudong Yang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-11-23
Filing date: 2007-07-20
Publication date: 2008-05-29
Also published as: CN101188858A; CN101406087B; CN101406087A

Abstract

A location updating method is provided, the current location area id information is stored in the terminal, the method comprises: the terminal judges if the cell to be selected of the terminal is in the current location area when it carries out the cell reselection, the location updating will not be carried out if it is, otherwise, the location area including the cell to be selected and the current resident cell will be the object location area and the location updating will be carried out. After carrying out the location updating by using the method of the embodiment of the present invention, even if the terminal at the border of the location area carries out cell reselection again and again in small range, the location updating will not be high frequency, thus it can freely select the most fit resident area to stay, and the terminal access capability is ensured. A location updating system, a location area allocating method, a cell broadcasting location area method and a calling method are also provided in the embodiment of the present invention.

Description

Location update method and system This application claims Chinese patents submitted to the Chinese Patent Office on November 23, 2006 and December 12, 2006, respectively, whose application numbers are 200610144871.6 and 200610167132.9, and whose invention names are "location update methods and systems" respectively. Priority of the application, the entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of mobile communication technologies, and in particular, to a location update method and system. Background technique

In the communication system, there are countless cells, which are the basic units constituting the mobile communication network, each cell corresponds to one base station, and one base station is generally configured with one or more cells, and each cell is responsible for the call task in the cell. . There are usually two ways for a call center to call a called party: If the call center knows the location of the called party, it will directly page at the location where the called party is located; if the call center does not know the location of the called party, it must be guaranteed once. When calling to the called party, a full network paging is required.

Specifically, in a GSM communication system, there are many cells under one switch. When a mobile switching center (MSC) wants to call a terminal, if the MSC knows the cell where the terminal is currently located, it directly pages in the cell where the terminal is located. If the MSC does not know the location information of the terminal and wants to page to the terminal, it needs to page all the cells under the MSC.

For the above two paging methods, the actual two methods are corresponding to the location update:

1. The terminal notifies the MSC to perform location update every time the cell reselects, and the MSC can only page the current cell of the terminal when searching. The advantage of this method is that the paging range is the smallest, and the paging takes up the least amount of air interface resources! However, the shortcoming is also obvious, that is, the amount of messages for updating the location is too large, and the signaling resources are expensive.

2. At each cell reselection, if the MSC does not change, the MSC is not notified, and the MSC can page all the cells under the MSC when paging. The advantage of this method is that the number of location updates can be minimized and the signaling resources are consumed the least! However, the disadvantage is that the paging range is too large, and the air resource occupied by the call is the largest!

In view of the shortcomings of the above two schemes, a compromise solution is obtained in the current GSM network. In this way, the concept of a location area is introduced, that is, a cell under one MSC is divided into one or more location areas, and each location area includes a plurality of cells below, and these location areas are closely connected, but do not overlap each other. In this way, when the location changes, for example, when the cell is reselected, the terminal determines whether the location area of the new cell changes. If the location area of the new cell is the same as the location area of the original cell, the cell reselection may not be performed. Notifying the MSC; if the location area of the new cell is different from the location area where the original cell is located, a location update procedure is initiated to notify the MSC that a location area change has occurred. In this location update mode, the manner in which the MSC pages the terminal is: When the MSC pages a terminal, all the cells in the location area where the terminal is located are paged.

However, for the above location update method, there are the following problems: Since the location areas are closely connected, but do not overlap each other, as shown in FIG. 1, the location area L1 and the location area L2 are therefore at the terminals of the boundary between the two location areas. Due to the back and forth movement of the location, or the fluctuation of the radio signal, the terminal frequently updates the location area when frequently reselecting the cell, thereby causing a large number of location area update messages, that is, location update messages. Based on this consideration, when designing the terminal, a threshold value is set for the location area update, and the threshold value is used to restrict the mobile user at the intersection of the location area to perform frequent location area update. For example, the threshold value may be set for the signal strength difference, so that the terminal performs the location area update when determining that the signal strength of the cell in the new location area and the signal strength difference of the current camping cell are greater than the threshold value, that is, the current The camping cell is reselected as the cell in the new location area; otherwise, when the terminal determines that the signal strength of the cell in the new location area is less than the threshold value of the current camping cell, the terminal does not perform the location area update. That is, the current camping cell is not reselected to this cell in the new location area.

The above-mentioned method of updating the frequent location area by the terminal at the boundary of the two location areas by the threshold value has the following negative effects:

1. The terminal at the boundary of the location area cannot freely choose the cell that is most suitable for camping. Especially when the signals of each cell at the junction are not good, the terminal cannot freely select the signal. The best cell will make the mobile The user's paging success rate and the connection rate of the terminal are degraded, which affects the quality of the network and wastes air interface resources. This is a waste of air interface resources, which is extremely unwise.

2. Even if the threshold is set to limit the frequent location update of the terminal at the junction of the location area, for a densely populated urban area, where the cell radius is small, at the junction of the location area It is still easy for the terminal to cross the cell, so that the terminal can easily satisfy the above threshold and cause the location update to occur. Summary of the invention

The embodiment of the present invention provides a location area configuration method, which can implement a terminal at a boundary of a location area to freely select a cell that is optimal to camp, and can reduce the number of location updates.

The embodiment of the invention further provides a method for a cell to broadcast a location area, which can achieve the purpose of broadcasting a plurality of location areas in which a certain cell is located.

The embodiment of the present invention further provides a location update method, which can implement a terminal located at a boundary of a location area to freely select a cell that is optimal to camp, thereby ensuring access performance of the terminal, and in a densely populated urban area, the cell radius is small. Next, the number of terminal location updates at the junction of the location area can be reduced.

The embodiment of the present invention further provides a location update system, which can implement a terminal located at a boundary of a location area to freely select a cell that is optimal to camp, thereby ensuring access performance of the terminal.

The embodiment of the invention provides a paging method, which can implement complete paging to a user when a location area covers multiple call center devices.

The embodiment of the present invention provides a location update method, where the terminal stores the current location area identifier information, and the base station to which the candidate cell belongs saves the primary location area identifier and the secondary location where the candidate cell is located in the configuration information of the candidate cell. Location area identifier, the method includes:

Receiving, by the terminal, a primary location area identifier and a secondary location area identifier where the candidate cell is located;

When the terminal reselects the cell, it determines whether the candidate cell is in the current location area. If not in the current location area, the target location area is selected from the location area corresponding to the primary location area identifier where the candidate cell is located, and the location is updated.

The embodiment of the present invention provides another location update method, where the terminal saves the current location area identifier information, and the method includes:

The terminal receives the location area identification information of the cell broadcasted by the base station and saves the location area; when the terminal reselects the cell, when determining that the candidate cell is not in the current location area, determining the target location area from the location area where the candidate cell is located , for location updates.

An embodiment of the present invention provides a location update system, where the system includes: a call center, a base station, and a terminal, The call center is configured to configure at least two mutually overlapping location areas;

The base station is configured to advertise the location area identifier information of the cell controlled by the cell through the cell broadcast message;

The terminal is configured to receive the location area identifier information of the broadcast, and when the terminal performs cell reselection, determine whether the candidate cell of the terminal is in the current location area, and if yes, perform location update, otherwise, the candidate cell is selected. Determining the target location area in the location area, and performing location update;

The call center responds to the location update initiated by the terminal.

An embodiment of the present invention further provides a paging method, where a location area is configured on different call centers, and the method includes:

The cell-related call center covered by the location area saves a correspondence table between the location area identifier and the cell identifier, and saves a correspondence table between the user identifier and the location area identifier according to the location update request;

When paging the user, according to the user identifier of the user to be paged, look up the correspondence table between the user identifier and the location area identifier, the location area identifier and the cell identifier correspondence table, obtain the cell information corresponding to the user identifier, and according to the user identifier and Obtaining cell information, and paging the cell represented by the cell information;

Paging the other call center devices related to the current paging, including the location area identifier and the user identifier in the paging message, and the other call center devices related to the current paging save the search according to the paging message. The location area identifier and the cell identifier correspondence table are obtained, and the cell information corresponding to the location area identifier is obtained, and paging is performed on the cell represented by the cell information according to the user identifier and the acquired cell information.

An embodiment of the present invention provides a method for configuring a mutual edge location area, including:

Configuring at least two location areas in the call center, and configuring at least one cell in the first location area and the second location area at the same time;

Configuring at least one cell in the first location area and outside the second location area; configuring at least one cell in the second location area and outside the first location area.

A method for broadcasting a location area by a cell according to an embodiment of the present invention includes:

And storing, by the base station to which the cell belongs, a plurality of location area identifier information that the cell is located; and the base station transmitting, by the cell broadcast, the identifier information of the multiple location areas in which the cell is located The information is broadcast once or divided into multiple broadcasts.

An embodiment of the present invention provides a method for determining a location area where a cell is located, including:

Obtaining a primary location area identifier and/or a secondary location area identifier in which the cell is located;

Determining whether the location area is in a location area corresponding to the primary location area identifier or in a location area corresponding to the secondary location area identifier, and if yes, the cell is in the location area, otherwise, the cell is not in the location District; or,

Determining whether the location area identifier of the location area is included in the primary location area identifier or the secondary location area identifier, and if so, the cell is in the location area; otherwise, the cell is not in the location area.

In the technical solution provided by the embodiment of the present invention, when the location center is configured, the call center performs a partial overlap manner to ensure that some or all boundaries of any one location area are wrapped by another location area, for example, two adjacent locations are guaranteed. The cell at the junction of the area is in the two location areas at the same time; the arrangement of the location area is such that the boundary of a certain location area is actually located in the hinterland of the other location area. Based on the configuration manner of the foregoing location area, when the terminal performs cell reselection, it is determined whether the candidate cell of the terminal is in the current location area, and if so, the location update is not performed, otherwise the location update is performed. Thus, for a terminal located at the boundary of a certain location area, when it moves out of the location area, it has actually moved to the hinterland of another location area adjacent to the location area, so that after the location update, even if The terminal continues to perform cell reselection at the boundary where the previous location area is wrapped by the current location area, and also because it is still located in the current location area without causing frequent location area updates. Therefore, it is not necessary to limit the frequent location area update by using a preset threshold, so that when the terminal is at a certain location boundary, the cell reselection can be freely performed according to the conditions of each neighboring cell, especially the signal strength, and the like. It is most suitable for the camped cell, thereby ensuring the access performance of the terminal. DRAWINGS

Figure 1 shows the existing location area model;

Figure 2 is the first rectangular position zone model;

Figure 3 is a circular position zone model;

Figure 4 is a second rectangular position zone model;

Figure 5 is a two-layer densely covered location area model; Figure 6 is a two-layer relaxed coverage position zone model;

Figure 7 is a three-layer densely covered location area model;

Figure 8 is a three-layer relaxed coverage location area model;

Figure 9 is a four-layer densely covered location area model;

Figure 10 is a four-layer relaxed coverage location area model;

11 is a general flowchart of a location update method according to an embodiment of the present invention;

12 is a general structural diagram of a location update system according to an embodiment of the present invention;

FIG. 13 is a specific flowchart of a terminal location update method in a first embodiment of the present invention; FIG. 14 is a specific structural diagram of a location update system of a terminal according to a first embodiment of the present invention; Specific flow chart of the update method;

FIG. 16 is a specific flowchart of a paging method according to an embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the drawings and embodiments.

Embodiments of the present invention provide a comprehensive solution to the problem of frequent location update when reselecting a cell, so that the user can select the cell that is most suitable for camping according to actual needs without causing frequent location update. The solution includes four aspects:

First, an embodiment of the present invention provides a location area configuration method, such that cells at the junction of two adjacent location areas in a certain area are in the two location areas at the same time.

Secondly, since there is a case where the same cell is located in two location areas at the same time, the present invention also provides a method for broadcasting a location area of a cell, so as to notify a plurality of location area information in which a certain cell is located to the terminal.

Third, the configuration method of the foregoing location area may cause the current paging policy to fail to completely page a user. For example, when a location area covers a cell under the control of multiple call center devices, any one of the call center devices It is impossible to notify other cells under the control of the call center device to page the user. Therefore, the embodiment of the present invention provides a paging method to solve the above problem of incomplete paging.

Finally, based on the foregoing location area configuration mode and the cell broadcast location area, the embodiment of the present invention further provides a location area update method and system. When the terminal performs cell reselection, the terminal determines Whether the candidate cell of the disconnected terminal is in the current location area, and if so, the location update is not performed, otherwise the location update is performed. Thus, for a terminal located at the boundary of a certain location area, when it moves out of the location area, it has actually moved to the hinterland of another location area adjacent to the location area, so that after the location update, even if The terminal continues to perform cell reselection at the boundary where the previous location area is wrapped by the current location area, and also because it is still located in the current location area without causing frequent location area updates.

The specific implementation manners of the above four aspects are respectively described below.

First, a location area configuration method in an embodiment of the present invention is introduced. The method includes: configuring at least two location areas in a call center, configuring at least one cell in the first location area and the second location area at the same time; configuring at least one cell in the first location area, and in the second location area Outside; at least one cell is disposed in the second location area and outside of the first location area. Of course, in the actual configuration process, a plurality of location areas satisfying the above conditions may be configured within a coverage of one or more call centers in the communication network to constitute various location area models.

In the process of configuring the location area, several concepts are involved, namely non-overlapping contact, overlapping contact, boundary wrapping, wrapping and mutual wrapping. These concepts are described below:

1. Contacting two location areas in a non-overlapping manner means that the two location areas have boundary overlaps, but there are no cells in both location areas.

2. Contacting the two location areas in an overlapping manner means that at least one cell exists in both location areas at the same time.

3. The boundary is wrapped. It means that the boundary of La is between the two cells in Lb, and the boundary of this part of La is wrapped by Lb.

4. Position area edge refers to a part or all of the boundaries of another location area in one location area. When the location area La wraps the boundary of the location area Lb: the location areas La and Lb are in overlapping manner, and one cell in the location area La is outside the location area Lb. Also known as the edge of the La package Lb.

5. La and Lb are wrapped around each other to mean: La package Lb side, and Lb package La side.

The following concepts are visually illustrated by three figures. These three figures are respectively three implementations of the above-described location area configuration method of the present invention.

Figure 2 shows the first simple rectangular location area model, as shown in Figure 2: U covers cells C01 ~ C08, C11 ~ C19, C21 ~ C28, C31 ~ C39, C41 ~ C48, C51-C59, etc. These cells have LI location area identification information; L2 covers cells C31 ~ C39, C41 ~ C48, C51~C59, C61~C68, C71~C79, C81~C88, etc. These cells have L2 location area identification information. Among them, the cells C31~C39, C41~C48, C51~C59 are in the two location areas L1 and L2. These cells in the two location areas at the same time have location area identification information of L1 and L2, respectively.

In Fig. 2, L1 and L2 are in overlapping contact; in fact, they are also mutually entangled, where L1 only wraps a part of the boundary of L2, and L2 only includes part of the boundary of L1.

Figure 3 shows a simple circular position zone model. As shown in Figure 3:

L1 covers the cells in the outer boundary of L1, and these cells have L1 location area identification information; L2 covers cells outside the inner boundary of L2 and within the outer boundary of L2, and these cells have L2 location area identification information. Among them, the cells outside the L1 outer boundary and the L2 inner boundary are in the two location areas L1 and L2, and the cells in the two location areas respectively have the location area identification information of L1 and L2.

In Figure 3, L1 and L2 are also in overlapping contact; they are actually mutually entangled. Here, L2 wraps all the boundaries of L1, and L1 wraps all the inner boundaries of L2. In practice, you can cover a small town with L1 and cover the suburb of the town with L2.

Figure 4 shows a second rectangular position zone model. As shown in Figure 4:

U covers cells C01 ~ C08, C12 ~ C19, C21 ~ C28, C32 ~ C39, C41 ~ C48, etc. These cells have LI location area identification information; L2 covers cells C21 ~ C28, C31 ~ C38, C41 ~ C48 , C51~C58, C61~C68, etc., these cells have location area identification information; L3 covers cells C51 ~ C59, C61 ~ C68, C71 ~ C79, C81 ~ C88, etc. These cells have L3 location area identification information. Among them, the cells C21 ~ C28, C32 ~ C38, C41 ~ C48 are in the two location areas L1 and L2, respectively, these cells have L1 and L2 location area identification information; cells C51 ~ C58, C61 ~ C68, etc. In the two location areas L2 and L3, these cells have location area identification information of L2 and L3, respectively.

In Fig. 4, L1 and L3 are in a non-overlapping manner, and L1 and L2 are in an overlapping manner, and L2 and L3 are also in an overlapping manner.

Similarly, in FIG. 5, any two of the three position areas L1, L2, and L3 are heavy. Stacked contact.

The above three figures are specific implementation manners of the location area configuration method in the embodiment of the present invention. Of course, the configuration of the location area is not limited to the above three modes. Next, a multi-layer location area model of the location area configuration method of the present invention will be described.

For narrow strips, such as a long and narrow island, when a location area can cover the width of the strip, you can use the two-layer dense overlay model shown in Figure 4. Here, you can lower the location area L2 according to the actual situation. Move or move up some. In the dense coverage model, the middle one of the three connected location areas overlaps with the two location areas on both sides, and the two location areas on both sides are in non-overlapping manner.

Similarly, for the coverage of narrow strips, the two-layer relaxation cover model of Figure 6 can also be used. In the relaxed coverage model, the middle one of the three connected position areas overlaps with the two position areas on both sides, and the two position areas on both sides are not in contact.

For large area coverage, the three-layer dense location area model shown in Figure 7 can be used, or the three-layer relaxed position area model shown in Figure 8 can be used.

As shown in Fig. 7, the thick line hexagon, the thick dashed hexagon and the thin line hexagon can each be independently covered continuously. The three layer positions are staggered and covered, and the three position areas in the same direction are thick. The two sides of the line hexagon are a thick dotted hexagon and a thin line hexagon, and the thick dotted hexagon is respectively a thick line hexagon and a thin line hexagon, and the thin line hexagon is respectively a thick dotted line six. Edge and thick line hexagons. Except for the boundaries of the entire area, the boundaries of any one of the location areas are wrapped by the location areas of the other layers. Here, one cell only needs to be in at most three location areas at the same time.

As shown in Fig. 8, the thick line hexagon, the thick dashed hexagon and the thin line hexagon can not cover the entire area independently and continuously, and the three are simultaneously staggered as shown in the figure, and the entire area can be covered together. . Except for the boundaries of the entire area, the boundaries of any one of the location areas are wrapped by the location areas of the other layers. Here, one cell only needs to be in at most three location areas at the same time.

Similarly, for large area coverage, the four-layer dense location area model shown in Figure 9 can be used, or the four-layer relaxed position area model shown in Figure 10 can be used.

As shown in FIG. 9, the first layer location area includes: ABFG, CDHL KLPQ, MNRS; the second layer location area includes: BCGH, DEI J, LMQR, NOST; the third layer location area includes: FGKL, HIMN, PQUV, RSWX The fourth layer location area includes: GHLM, IJ O, QRVW, STXY. Each layer of the location area can continuously cover an area, and the four layer location areas are alternately covered to cover the entire area. Except for the boundaries of the entire area, the boundaries of any one of the location areas are wrapped by the location areas of the other layers. Here, one cell only needs to be in at most four location areas at the same time.

As shown in FIG. 10, the first layer location area includes four dotted square quadrilateral location areas, the second layer location area includes two line segment dashed quadrilateral location areas, and the third layer location area includes two thin line quadrilateral location areas, and the fourth The layer location area includes a thick line quadrilateral location area. Continuous coverage is not possible for each location area unless there is only one location area in a location area. The four-layer location area is simultaneously staggered as shown in the figure, and the coverage of the entire area can be completed together. Except for the boundary of the entire area, the boundaries of any one of the location areas are wrapped by the location areas of the other layers. Here, one cell only needs to be in at most four location areas at the same time.

The dense location area model can reduce the possibility that the terminal crosses the boundary of two non-overlapping location areas, that is, the possibility of crossing the boundary of the location area, but in the call center, the location area data configuration will be correspondingly more.

Relaxed Location Zone Model Relative to the dense location zone model, the probability of a terminal crossing two non-overlapping location boundaries increases, and the likelihood of crossing the location boundary increases, but the location area data configuration in the call center is correspondingly less.

In practical applications, when a location area coverage is provided for a relatively wide area, the above various location area coverage models can be comprehensively applied to achieve both engineering and network quality.

The multi-level location area described above is a two-layer, three-layer and four-layer model. Of course, according to the edge-edge technology, more layers of positional area configurations can be formed. The principle is the same, and will not be described here.

The above is a specific implementation manner of the location area configuration method according to the embodiment of the present invention. After the location area configuration method is applied, the same cell may be in multiple location areas. According to the manner in which the current cell broadcasts the message, the multiple location areas in the cell cannot be broadcast to the user. Therefore, the embodiment of the present invention further A cell broadcast method is provided. The method specifically includes: storing, in a base station to which the cell belongs, identifier information of multiple location areas in which the cell is located; the cell broadcast location area identifier information is a plurality of locations in which the cell is located by the base station once or in multiple times. The identification information of the location area is broadcast to the terminal.

The specific implementation of the foregoing method can be divided into two major types: 1. In the broadcast message of the cell, only the identification information of the location area in which the cell is located is broadcasted, and the terminal receives the coverage of each of the multiple cells. The broadcast message acquires the identification information of the location area where the cells are located. 2. The broadcast area message of the cell broadcasts the location area identifier information of the neighboring cell in addition to the location area identifier information of the neighboring cell. The terminal can obtain the location area identification information of the cell and its neighboring cells by receiving the broadcast message of the cell. The two methods are described separately below.

1. Broadcasting only the identification information of the location area in which the cell is located in the broadcast message of the cell. The manner in which the location area identifier corresponding to the cell is stored in the base station. For example, in the base station, according to the identification information of the cell managed by the base station, the plurality of location area identification information to which each cell belongs is stored in the base station. Referring to FIG. 4, C52, C53, and C62 belong to the same base station. The three cells managed are shown in Table 1.

Table 1

When the cell broadcasts, the base station obtains the plurality of location area identification information of the cell according to the cell identifier from the cell identifier and the location area identifier information correspondence table as shown in Table 1, and broadcasts the cell broadcast message one or more times. In this way, the terminal can obtain the identification information of multiple location areas in which one cell is located by using the cell broadcast message.

Of course, you can also use the following Table 2 to save multiple location area identification information that each cell belongs to:

Table 2

It should be noted that when the correspondence table of the d, the area identifier and the location area identification information is saved, As shown in Table 1 and Table 2, according to the identification information of the cell managed by the base station, the plurality of location area identification information to which each cell belongs may be stored in the base station, or may be performed in another form. That is, in the base station, the cell identity information managed by the base station is saved in the base station according to the identification information of the location area; for example, Table 3:

table 3

Obviously, from Table 3, multiple location area identification information of the cell may also be obtained according to the cell identifier.

In fact, Table 2 can also be referred to as saving d and area identification based on location area identification information.

Certainly, when the base station saves the location area identifier information of a cell, the base station may also perform other methods, for example, saving the identifier information of the location area in which the cell is located together with other parameters of the cell to a data file. in.

For the case where the location identifier information of one cell is more than one, when the cell broadcasts the location area identification information, the cell can be broadcasted once, for example, the length of the broadcast message of the extended cell, and the amount of information of the broadcast location area is increased, and the cell is once The location area identification information in the broadcast is broadcasted.

The cell may also broadcast the plurality of location area identification information of the cell by multiple broadcasts. For example, a round-robin method can be used to broadcast a location area identification information at a time. For example, for the cell C62 in the above table, the location area identification information of the cell is L2 and L3, the first broadcast of the cell can broadcast the location area identification information of the L2, and the second broadcast can set the location area of the L3. The identification information is then broadcasted to the location area identification information of L2, and the broadcast is cyclically. In an actual application, the cell may insert other cell parameter information between two messages of the broadcast location area identification information.

For example, the terminal obtains one or more location area identifier information that the cell is located in the cell broadcast information, and determines whether the acquired identifier information of the location area is included in one or more location area identifier information of the acquired cell. If yes, it is determined that the cell is in the location area, otherwise, it is determined that the cell is not in the location area. The manner in which the terminal acquires the location area identifier information that the two cells are in common may be: the terminal acquires one or more location area identifier information that the first cell is located from the first cell broadcast information, as the first cell location area identifier information, Obtaining, by the second cell broadcast information, one or more location area identifier information that the second cell is located as the second cell location area identifier information; and then comparing, by the terminal, the first cell location area identifier information and the second cell location area The identification information is obtained, and the same location area identification information in the two sets of location area identification information is obtained, so that the location area identification information that the first cell and the second cell are in common can be obtained.

Generally, each cell broadcasts the identification information of all the location areas in which the cell is located, so that the terminal can obtain the identification information of all the location areas in which the corresponding cell is located from the broadcast message of each cell. In this case, the terminal passes the The broadcast message of the current camping cell acquires the identifier information of the location area where the current camping cell is located, and obtains the identifier information of each location area where the neighboring cell is located by using the identifier information of the neighboring cell.

2. The cell broadcast message includes the location area identification information of the cell and the neighboring cell of the cell.

Certainly, the message broadcasted by the cell includes the identification information of the location area where the cell is located, and may further include the identifier information of the location area where the neighboring cell is located, for example, further in the base station to which the cell belongs. And storing, according to the identifier information of the cell and the identifier information of the neighboring cell, identifier information of a corresponding location area where the neighboring cell of the cell is located, or storing, in the cell configuration data, each location area where the neighboring cell is located. As shown in FIG. 4, the neighboring cell of the cell C62 has six cells, such as C52, C53, C61, C63, C72, and C73, such that the location area of the neighboring cell stored in the configuration data of the cell C62 is located. The identification information data can be described in Table 4 below:

Table 4

Adjacent cell identification

C52 L2, L3

C53 L2, L3

C61 L2, L3

C63 L2, L3

C72 L3

If the base station stores the location area identification information of the multiple cells managed by itself and the location area identification information of the neighboring cells, then a field of the current cell identification information may be added in Table 4, for example, C52, C53 and C62 belong to three cells managed by the same base station, as described in Table 5 below:

table 5

Based on the configuration of Table 4 or Table 5, the base station may further include, in the cell broadcast message, an identifier of the neighboring cell of the cell and corresponding identifier information of the corresponding location area where the neighboring cell is located. In this case, the terminal only needs to obtain the current status through the broadcast message of the currently camped cell. Each location area identification information in which the camping cell and its neighboring cells are located. But this will increase the amount of information broadcast by the cell.

The specific implementation of the above two methods will be described by taking the location area number as the location area identifier as an example. 1. Preferably, the identifier information of all the location areas in which the cell is located is saved in the cell configuration, so that when the cell broadcasts, the broadcast message includes the configured location area number of the cell, and the location area There may be more than one number, corresponding to multiple location areas. The terminal may obtain, from the broadcast message of the cell, the location area number in which the currently camped cell is located and the location area number in which the adjacent cell is located. When the cell broadcast is performed, the base station may broadcast all the location area numbers of the cell in one time or multiple times, and the terminal acquires the location area number information of a cell by receiving the broadcast signal of the cell.

Specifically, the manner in which the terminal acquires the location area number of the current cell and the neighboring cell may be:

The terminal may obtain the location area number of the current cell and the related parameter information of the neighboring cell from the broadcast message of the current cell, where the parameter information may further include the identifier information of the neighboring cell; the terminal according to the acquired neighboring cell The parameter information may receive the neighboring cell signals, and obtain the location area number broadcast by the neighboring cell from the signals, that is, the location area number in which the neighboring cell is located.

b. The terminal can directly use the random frequency modulation or other means to listen to the broadcast signal of the neighboring cell, and not obtain the parameter information of the neighboring cell from the broadcast message of the current cell, so as to intercept the neighboring information according to the parameter information. The way the cell broadcasts signals. However, such direct random frequency modulation or other means of listening to neighboring cell broadcast signals may be costly to the terminal.

2. In the cell configuration, the number of all the location areas in which the cell is located is saved, and the number of each location area in which the neighboring cells of the cell are located is also saved. For example, the location area number of the neighboring cell may be configured in the configuration data of the current camping cell, that is, in the base station to which the current camping cell belongs, the corresponding location area where the neighboring cell of the cell is located is further saved. The information is identified, so that when the current cell broadcasts, the broadcast message includes the location area number in which the current cell is located, and further includes the location area number in which the neighboring cell is located. The terminal acquires the location area number information of the neighboring cell from the broadcast signal of the current cell. However, this will increase the amount of broadcast information of the current cell. In the above two manners, the location area identifier information in which the cell is located may be further saved according to the cell identifier in the call center or the base station controller to which the cell belongs, or may be saved in the location area according to the location area identifier information. The cell identification information included in the control of the call center or the base station controller is included, that is, the correspondence between the location area identification information of the cell and the cell identification information is pre-stored, and the location area identification information of the cell saved by the base station is included. It may be obtained from the call center or the base station controller after the base station is powered on. For example, the base station sends a request message for acquiring the location area identifier information of the cell to the call center or the base station controller, where the message carries the cell identity information, and after receiving the request, the base station or the base station controller according to the cell The identifier information is obtained from the location relationship information of the location area identifier information and the cell identifier of the saved cell, and the location area identifier information of the cell is obtained, and the obtained location area identifier information is sent to the base station.

However, in most applications, the correspondence between the location area identification information of the cell and the cell identity can be directly configured by the engineer in the base station during network deployment.

In the above manner, the terminal can know the corresponding configuration manner of the call center to the location area. Based on the above-described location area configuration method and cell broadcast location area method, a specific implementation manner of the location update method and system of the embodiment of the present invention will be described below.

11 is a general flow chart of an embodiment of a location update method of the present invention. As shown in Figure 11, the method includes:

Step 1101: Configure a location area in the call center, and set at least a first location area and a second location area, where at least one cell is configured to be in the first location area and the second location area at the same time, and at least one cell is configured to be in the In the first location area and outside the second location area, the at least one cell is configured to be in the second location area and outside of the first location area.

This step completes the configuration of the two inter-edge location areas.

In this step, the location area configuration is performed in the same manner as the foregoing location area configuration. The call center can be a call center resource pool, i.e., can include one or more call center devices.

Each call center device is capable of establishing communication with at least one cell, and the cell that has established communication with the call center device is a cell of the call center device.

The location area may include one or more cells of a call center device, and may also include One or more cells of a plurality of call center devices.

For example, for a GSM communication network, a call center device can be an MSC/VLR device, and the call center can be a resource pool of one or more MSC/VLR devices.

Step 1102: The cell broadcasts the location area identification information of the cell to the terminal.

Step 1103: When the terminal performs cell reselection, it is determined whether the candidate cell of the terminal is in the current location area, and if yes, step 1104 is performed, otherwise step 1105 is performed.

In step 1104, the location update is not performed and the process ends.

Step 1105: Determine one location area in the one or more location areas where the candidate cell is located as the target location area, and perform location update.

In step 1101, the first location area and the second location area are actually two location areas that are mutually entangled.

In step 1105, after the location update succeeds, the method further includes performing the setting of the candidate cell as a camping cell operation, and setting the target location area as a current location area.

In step 1105, a location area may be directly or randomly determined from the one or more location areas in which the candidate cell is located as the target location area; or a certain policy may be used to determine the target location area; or And determining, by the number of the location areas in the candidate cell, whether the number of the location areas in the candidate cell is more than one, and if yes, from the candidate cell and the current camping cell. The target location area is determined in the location area, and the location area in which the candidate cell is located is used as the target location area to perform location update.

In step 1105, the location update may be performed by sending the target location area identification information to the call center. After receiving the target location area identification information sent by the terminal, the call center sets the current location area of the terminal as the received target location area identifier. The location area specified by the information. After the location update is successful, the terminal can send a success message to the terminal, and the terminal saves the target location area identification information as the current location area identification information.

In the embodiment of the present invention, the manner of determining whether a cell belongs to a location area may be: the terminal acquires one or more location area identifier information of the cell from the cell broadcast information; and determines that the acquired cell is in the Whether the identification information of the location area is included in the location identifier information, and if yes, determining that the cell is in the location area; otherwise, determining that the cell is not in the location area. For example, if the terminal saves the current location area identifier information, the terminal obtains one or more location area identifier information of the candidate cell from the broadcast information of the candidate cell, and then determines whether the candidate cell is selected. In the current location area, it is determined whether the location identifier information of the one or more location areas in which the obtained candidate cell is located includes the current location area identifier information, and if yes, it is determined that the candidate cell is in the current location area, Otherwise, it is determined that the candidate cell is not in the current location area.

When the terminal determines that the current location area identifier information is not saved, the terminal obtains one or more location area identifier information of the current camped cell from the current camped cell broadcast information, and saves one of the location area identifier information as the current location. The zone identifies the information and initiates a location update.

The manner in which the terminal obtains the location area identifier information that the current camping cell and the candidate cell are in common may be: the terminal may obtain, by using the currently camped cell broadcast information, one or more location area identifier information where the current camping cell is located as the current Resident cell location area identification information, and obtaining one or more location area identification information of the candidate cell from the candidate cell broadcast information as the candidate cell location area identification information; the terminal compares the current resident cell location area identifier by comparing The information and the location information of the candidate cell location area may obtain the location area identification information that the candidate cell and the current camping cell are in common.

The location area identifier information herein may be the location area identifier itself or the location area serial number. For example, the location area identifier of the present invention may be a location area identifier (LAI) or a location area code (LAC) for the GSM system. Code).

FIG. 12 is a schematic structural diagram of an embodiment of a terminal location update system according to the present invention. As shown in FIG. 12, the system includes: a call center 1210, a base station 1220, and a terminal 1230.

In the system, the call center 1210 is configured to configure a location area, and at least includes a first location area and a second location area, where at least one cell is in the first location area and the second location area at the same time, the first location area At least one cell is outside the second location area, and at least one of the second location areas is outside the first location area; and is further configured to receive the target location area identification information sent by the terminal, and perform location update.

The base station 1220 is configured to obtain the location area identification information of the corresponding cell that is sent from the call center 1210, and distribute the information to the terminal 1230 through the cell broadcast message.

The terminal 1230 is configured to receive, by the base station 1220, the corresponding cell that is released in the cell broadcast. The location area identification information, when the terminal performs cell reselection, determines whether the candidate cell of the terminal is in the current location area, and if so, does not perform location update; otherwise, determines the target location area from the location area where the candidate cell is located, Make a location update.

In the above system structure, the terminal 1230 and the call center 1210 are not directly connected, and the two are connected by other network devices, so the connection relationship between the two is indicated by a broken line, but the final target location area identifier can be sent to the call. Center 1210.

The foregoing is a general overview of the embodiment of the present invention. When the cell reselection is performed, the cell that is optimally camped can be selected according to the needs.

Specifically, taking FIG. 2 as an example, the division of the location areas L1 and L2 is performed by the mutual wrapping method. Since L1 wraps the boundary of L2, L2 wraps the boundary of L1, thereby reducing the variability of the current location of the terminal caused by the location update of the mobile terminal at the boundary between the two locations.

Since the location area is edged, thus, when the terminal reaches the boundary of the location area of the L2 package of the location area L1, it actually reaches the hinterland of the location area L2. In this case, when the location is updated to L2, Since the terminal is in the hinterland of L2 instead of the boundary of L2, the repeated position update caused by the terminal at the boundary of the location area is avoided.

The cells at the overlap of L1 and L2 are in the location areas L1 and L2, and the cell configuration information may include location area identification information of L1 and L2; the broadcast signal of these cells may also include the location area identifiers of L1 and L2. information.

When the terminal location is updated, the selected location area is registered to the call center of the network. For example, in the GSM network, the location area identifier can be sent to the VLR for location area registration. When the terminal reselects the cell, when it is determined that the candidate cell does not belong to the current location area, the location update is initiated, and the location is updated to the new location area. Preferably, the terminal determines whether the candidate cell and the current cell have a common location area, and if so, updates the location to the common location area.

For the location areas that are originally in contact in a non-overlapping manner, as in L1 and L3 in FIG. 4, the solution of the present invention is to allow the two location areas that are in non-overlapping manner to be adjacent to each other, or to be bordered, to be circumscribed, It is brought into contact in an overlapping manner as shown in Fig. 2, in which L1 and L2 are edging each other.

The location information of the cell is included in the cell configuration information, and the message broadcasted by the cell includes the location area identifier information, such as the location area number, in which the cell is located, so that the cell divides the location area. The result informs the terminal of the purpose. The cell broadcast message includes There may be more than one location area number, corresponding to multiple location areas.

The foregoing method for broadcasting the location area identification information of the cell may use the foregoing implementation manner, and the terminal may obtain the location area configuration information performed by the call center, that is, the location area identification information of a cell. Therefore, before the terminal reselects the cell, the terminal first determines whether the location area number of the candidate cell (Cij) is located in the location area number registered by the terminal on the network side, that is, the current location area number. If yes, the terminal will be stationed. The reserved cell is selected as Cij; if there is no location area number registered by the terminal on the network side in the location area number where Cij is located, the terminal initiates a location update procedure, and updates the location to the location area where Cij is located. Preferably, if Cij and the current camping cell (Cdock) have a location area in common, the location area where Cij and Cdock are co-located is selected as the current location area, and after the location update succeeds, the current camp is currently resident. The cell selection is Cij.

For example, when the terminal determines that the signal quality of a cell Cij is better than the signal quality of the currently camped cell Cdock, the above-mentioned reselection cell flow may be initiated.

When the terminal performs cell reselection at the boundary between the location areas L1 and L2, if the candidate cell Cij is found to be in the location area currently registered in the call center, the location update process is not initiated, but only the cell is reselected as Cij. If it is found that the candidate cell does not belong to its current location area, a location update process is initiated. For example, the current location area is the location area L1, where the terminal holds the location area identification information registered in the call center.

When the terminal initiates the location update process, it is better to first determine whether Cij and Cdock are in a certain location area or not, and if so, select a location area in the common location area as the current location area.

The following process is illustrated by using FIG. 2 as an example: assuming that the current location area is LI and Cdock is C56, when Cij is C55, or C57, or C45, or C46, the terminal does not perform location update when reselecting the cell; When Cij is C65 or C66, since C65 or C66 does not belong to the location area L1, the terminal also needs to perform location update when reselecting the cell. Taking Cij as C66 as an example, when the terminal is updated, L2 is selected as the updated target location area. Of course, the location area common to C66 and C56 is also L2.

In the location area model shown in FIG. 2, after the terminal reselects from the cell C56 to the cell C66 and updates the current location area to L2, the terminal reselects from the cell C66 to the cell C56 due to the reason of the signal or the user's movement. When the terminal judges that C56 also belongs to L2, therefore, it will not be carried out again. The update is updated. In this way, the terminal does not have the problem of frequently performing location update due to the boundary of the L2 package at L1.

Correspondingly, when the current location area of the terminal is L2, after reselecting from the cell C33 to the cell C22 and updating the current location area to L1, when the terminal reselects from the cell C22 to the cell C33 due to signal reasons or user mobility reasons. At the time, the terminal judges that C33 also belongs to L1, and therefore, the location update is not performed. In this way, the terminal does not have the problem of frequently performing location updates due to the boundary of L2 being wrapped by L1.

Of course, in practical applications, the terminal reselecting the cell does not only use the cell signal quality as the sole criterion for judging, and the terminal may also consider other factors such as the busyness of the cell, and will not be described here.

It can be seen from the above that the present invention can effectively solve the problem of frequent location update caused by the terminal swaying at the boundary of a certain location area in the prior art.

As described above, in the embodiment of the present invention, there are four cases when determining the target location area: a. determining the target location area from the location area where the current cell and the candidate cell are common; b, first determining where the candidate cell is located The number of location areas is determined, and the target location area is determined; c. The location area is determined directly or randomly; d. The location area is determined according to the location relationship between the terminal and each location area where the candidate cell is located. Three embodiments will be described below to illustrate specific implementations of the location update method of the present invention in the case of a combination of ab, ac, and ad.

Location update method embodiment 1:

In this embodiment, when determining the target location area, first determine the number of location areas in which the candidate cell is located, and then determine the target location area according to the number.

FIG. 13 is a specific flowchart of Embodiment 1 of the location update method in the present invention. As shown in Figure 13, the method includes:

Step 1301: In the call center, at least two location areas that are mutually wrapped are set.

For example, the two location areas are set as the first location area and the second location area, and at least one cell is configured to be in the first location area and the second location area at the same time, and at least one cell is configured to be in the In the first location area and outside the second location area, at least one cell is configured to be in the second location area and outside of the first location area. In this step, of course, the configuration of the location area can be performed by referring to the various location area configuration models of the hem described above.

Step 1302: The cell broadcasts the location area identification information of the cell to the terminal. In this step, the method in which the base station where the cell is located obtains the location area identification information of the cell may be: The call center configures the identifier information of one or more location areas where the cell is located, and obtains the information from the call center when the base station is powered on. The location area identifier information of the cell is located, and the location area identifier information of the cell is configured in the base station; or, when the network is initially established, the location area identifier information of the cell is configured into the base station. For a GSM network, the call center can be an MSC/VLR. Correspondingly, for the GSM system, the base station controller (BSC) may also configure the identification information of one or more location areas where the cell is located, and when the base station is powered on, the location area where the cell is located may be obtained from the BSC. Identification information.

The specific manner in which the base station broadcasts the location area identifier information to the terminal is: the cell broadcast information further includes identifier information of one or more location areas in which the cell is located, and the base station broadcasts the location area identifier information in one time or multiple times. Give the terminal. This embodiment is also a specific implementation manner of a method for broadcasting cell location location identifier information provided by an embodiment of the present invention.

Step 1303: When the terminal performs cell reselection, it is determined whether the candidate cell of the terminal is in the current location area. If yes, step 1304 is performed; otherwise, step 1305 is performed.

In step 1304, the location update is not performed and the process ends.

Step 1305: The call center determines whether the number of location areas in which the candidate cell is located is one. If yes, step 1306 is performed. Otherwise, step 1307 is performed.

Step 1306: The location area where the candidate cell is located is used as the target location area, and the location is updated, and the process ends.

Step 1307: Determine a target location area from a location area in which the candidate cell and the current camping cell are co-located, and perform location update.

In step 1306, when the location area of the candidate cell is one, the method of determining the signal strength of the candidate cell and the current camping cell may be performed according to the processing manner of the terminal reselecting cell in the existing GSM network. If the intensity difference reaches a preset threshold, if the preset threshold is reached, the candidate cell is used as the camping cell, and the location area of the candidate cell is used as the target location area for location update; otherwise, The candidate cell is not performed as a camping cell, and the determination of the target location area and subsequent location update operations are not performed.

Preferably, when the number of location areas in which the candidate cell is located is one, it can be determined whether the current camping cell is in the location area of the candidate cell, and if so, the location area can be directly As the target location area. If it is determined that the current camping cell is not in the location area of the candidate cell, the signal strength of the candidate cell and the signal strength of the current camping cell are determined according to the processing manner of the terminal reselecting cell in the existing GSM network. If the preset threshold is reached, if the preset threshold is reached, the candidate cell is used as the camping cell, and the location area of the candidate cell is used as the target location area for location update; otherwise, the execution will not be performed. The candidate cell acts as a camping cell and does not perform the determination of the target location area and subsequent location update operations.

In step 1306, it may be further determined whether the current camping cell is in the location area of the candidate cell, and if so, the location area of the candidate cell is used as the target location area. Take the location area model shown in Figure 2 as an example: Assume that the current camping cell is C32, the current location area is L2, the candidate cell is C22, and the number of location areas where C22 is located is one, that is, the location area L1, obviously C32 is located in the location area L1 of C22, where L1 can be used as the target location area.

In practice, when there are two location areas in a non-overlapping manner, it may be determined that the current camping cell is not in the location area of the candidate cell. In this case, refer to the GSM prior art cell reselection. The method is to perform cell reselection. Taking the location area model shown in FIG. 4 as an example, the current location area is L1, the current cell is C48, and the candidate cell is C59. Here, the location area where C59 is located is only L3, and the current location The reserved cell C48 is not in L3, and thus can be processed by referring to the existing cell reselection mode of GSM. For example, a signal strength difference threshold may be preset to determine whether the difference between the signal strength of the candidate cell and the signal strength of the currently camped cell reaches a preset threshold. If the preset threshold is reached, the candidate is selected. The location area of the cell is used as the target location area, otherwise, the determination of the target location area and subsequent location update operations are not performed.

Here, the terminal obtains one or more location area identifier information in which the current camping cell is located from the currently camped cell broadcast information; determining whether the current camping cell is in the location area of the candidate cell may be: Whether the location information of the location area of the candidate cell is included in the one or more location area identification information of the camping cell, and if yes, determining that the current camping cell is in the location area of the candidate cell Otherwise, it is determined that the current camping cell is not in the location area of the candidate cell.

In step 1306, when it is determined that the location area where the candidate cell is located is one, the operation of determining whether the current camping cell is in the location area of the candidate cell may not be performed, but directly The location area of the candidate cell is used as the target location area. This situation is particularly effective when each location area in a communication network is only in overlapping contact with other location areas. Of course, the processing can also be performed by referring to the existing cell reselection mode of the above GSM, and details are not described herein again.

In step 1307, before determining the target location area from the location area where the candidate cell and the current camping cell are located, the location area of the candidate cell and the current camping cell may be further determined. If yes, And performing the operation of determining the target location area from the location area where the candidate cell and the current camping cell are located, and otherwise selecting one of the multiple location areas where the candidate cell is located as the target location area, for example, One of the plurality of location areas in which the candidate cell is located is randomly or randomly selected as one of the target location areas as the target location area.

In step 1307, when there is only one location area where the candidate cell and the current camping cell are co-located, the location area is directly used as the target location area. Take the location area model shown in Figure 4 as an example: Assume that the current camping cell is C43, the current location area is L1, the candidate cell is C53, and the number of location areas where C53 is located is two, that is, location area L2 and L3. Obviously, the location area where C32 and C22 are co-located is L2. Here L2 is used as the target location area.

In step 1307, when the candidate cell and the current camping cell are in more than one location area, one of the plurality of location areas in which the candidate cell and the current camping cell are located is selected as the target location area. For example, a location area is selected as a target location area arbitrarily or randomly from a plurality of location areas in which the two cells are co-located. Take the location area model shown in Figure 5 as an example: Assume that the current camped cell Cdock is C53, the current location area is L1, the candidate cell is C62, and the number of location areas where C62 and C53 are co-located is two, that is, the location. Zones L2 and L3. In this case, one location area can be arbitrarily or randomly selected from C53 and C62 as the target location area, for example, L3 is selected as the target location area.

In step 1307 of this embodiment, when the target location area is determined, the location area in which the candidate cell and the current resident cell are co-located is selected. In fact, it is also possible to randomly or arbitrarily determine a location area from the plurality of location areas in which the candidate cell is located as the target location area, and it is not necessarily necessary to select among the location areas in which the candidate cell and the current camping cell are co-located.

In this embodiment, after the location update is successful, the terminal may further include the terminal as the camped cell, and save the target location area identifier information as the current location area identifier information. For example, the call center sends a location update success message to the terminal, and the terminal passes the message. Know if the location update was successful.

The foregoing is a specific process of the location update method of the terminal provided by the embodiment. The embodiment further provides a specific structure of the location update system of the terminal, which can be used to implement the location update method. FIG. 14 is a detailed structural diagram of a location update system of a terminal according to Embodiment 1 of the present invention. As shown in FIG. 14, the system includes: a call center 1210, a base station 1220, and a terminal 1230. The terminal 1230 includes a receiving module 1231, a main control module 1232, and a sending module 1233.

In the system, the call center 1210 is configured to configure a location area, where at least a first location area and a second location area are included, and at least one cell is in the first location area and the second location area, in the first location area. At least one cell is outside the second location area, and at least one of the second location areas is outside the first location area; and is further configured to receive the target location area identifier sent by the terminal, and perform location update.

The base station 1220 is configured to obtain the location area identification information of the transmitted cell that is managed by the call center 1210, and distribute the information to the terminal 1230 through the cell broadcast message.

In the terminal 1230, the receiving module 1231 is configured to receive, by the base station 1220, a cell broadcast message, where the message includes all location area identifiers to which the base station belongs, and send the broadcast message to the main control module 1232. The main control module 1232 is configured to receive the cell broadcast message forwarded by the receiving module 1231, determine cell reselection according to the signal status of each cell in the message, and determine whether to perform location update according to whether the candidate cell is in the current location area. When it is determined that the location update is performed, the location area to which the candidate cell and the current camping cell belong together is used as the target location area, and the sending module 1233 is notified to perform location update. The sending module 1233 is configured to send the target location area identifier of the receiving autonomous control module 1232 to the call center 1210.

In the specific implementation of the foregoing system, the sending module 1233 of the terminal 1230 is not directly connected to the call center 1210, and is connected by other network devices, but the final target location area identifier can be sent to the call center 1210.

When the location update is performed according to the foregoing method and system, when the terminal at the boundary of a certain location area performs cell reselection and initiates location update, the location area is updated to be the same as the candidate cell and the current camping cell. The location area, therefore, even if the terminal reselects the original resident cell due to problems such as signal or quality of service, there is no need to perform location update, thereby avoiding the location area of the terminal at the boundary of the location area due to repeated cell reselection. Frequently updated issues. By In the case that there is no frequent update of the location area, it is naturally unnecessary to set the location update of the threshold to limit the terminal, so that the terminal can freely select the cell that is optimally camped according to network conditions.

In practice, when determining the target location area, the operation may be performed without first determining whether the number of location areas in which the candidate cell is located is one, but determining the target location area directly from the location area where the candidate cell is located. . The following embodiment will be described as an example of a specific embodiment of the location update method.

Location update method embodiment 2:

FIG. 15 is a specific flowchart of Embodiment 2 of the location update method in the present invention. As shown in Figure 15, the method includes:

Step 1501: In the call center, at least two location areas that are mutually wrapped are set.

In this step, the location area information configuration of the cell may be performed by using the foregoing respective location area configuration manner.

Step 1502: The cell broadcasts the location area identification information of the cell to the terminal.

In this step, the manner in which the base station where the cell is located obtains the location information of the location of the cell and the manner in which the cell broadcasts the location area identification information to the terminal may be the same as that in the first embodiment, and details are not described herein.

Step 1503: When the terminal performs cell reselection, it is determined whether the candidate cell of the terminal is in the current location area, and if yes, step 1504 is performed; otherwise, step 1505 is performed.

In step 1504, the location update is not performed and the process ends.

Step 1505: Determine a target location area from a location area where the candidate cell and the current camping cell are located together, and perform location update.

In step 1505, when the location area in which the candidate cell and the current camping cell are co-located is one, the location area may be directly used as the target location area. When the location area of the candidate cell and the current camping cell are more than one, the location area of the more than one location area that the candidate cell and the current camping cell are in common is selected as the target location area, for example, , randomly or arbitrarily select one from these common location areas as the target location area.

In step 1505, the location area where the candidate cell and the current camping cell are coexistent does not exist. At the time, one of the one or more location areas in which the candidate cell is located may be selected as the target location area. For example, a location area is randomly or randomly selected as a target location area.

In this embodiment, after the location update is successful, the terminal may further include the terminal as the camping cell, and save the target location area identifier information as the current location area identifier information. For example, the call center sends a location update success message to the terminal, and the terminal knows whether the location update is successful through the message.

The method flow in this embodiment differs from the first embodiment in that, when the target location area is determined, one of the one or more location areas in which the candidate cell and the current cell are co-located is directly selected as the target location area. The operation of the other steps is the same as in the first embodiment, and the method flow in this embodiment can also be implemented in the system shown in Fig. 14.

In the embodiment of the present invention, when determining the target location area, if there are multiple optional location areas, that is, the candidate cells are in multiple location areas at the same time, one of the location areas may be randomly or randomly selected as the target location area; A location area can be selected as the target location area according to a certain strategy. The following embodiment describes the location update method in this case.

Location update method embodiment three:

In this embodiment, when determining the target location area, the target location area is determined according to a certain policy, specifically: further selecting the location of the current location of the terminal relative to each of the optional location areas.

The process of the location update in this embodiment is the same as that in the second embodiment. In the step 1505, when the location area of the candidate cell and the current camping cell are more than one, the terminal is currently selected according to each option. The positional relationship of the location area determines the target location area.

In this embodiment, the distance from the current position of the terminal to the center of each of the selectable location areas is used as a selection criterion, and the location area closest to the terminal in the center of the location area is selected as the target location area. There are two specific ways to determine the target location area:

1. The geographical location information of the center of the cell broadcast location area, and the terminal determines the target location area. a. In step 1502, the cell broadcast signal may further include geographical location information of the pre-stored location area center, and the terminal acquires the geographic location information of the location area center by receiving the broadcast information.

b, in step 1505, the terminal may use a GPS positioning method or a base station of the mobile network The positioning method obtains its own geographical location information, and the terminal obtains its own distance to the center of the location area by comparing its geographical location information with the geographical location information of the obtained location area center.

c. In step 1505, the location area with the smallest distance from the terminal to the center of the location area is selected as the target location area, and the location is updated.

2. The geographical location information of the cell broadcast cell center, and the terminal determines the target location area.

a, in step 1502, the terminal may also obtain its own geographical location information according to the geographical location information of the center of the candidate cell, for example, directly the geographical location information of the center of the candidate cell as its own geographical location information, in the cell broadcast signal The location information of the pre-stored cell center may be further included, and the terminal acquires the geographical location information of the cell center by receiving the broadcast information, and uses it as its own geographical location information. According to the "one," method, the terminal can obtain its own positional relationship with the center of the plurality of location areas in which the candidate cell is located.

In practice, the geographic location information of the cell center may be a central deviation degree information, that is, the central deviation degree information of the cell center and the location area center. For example, a total of 16 values from 0 to 15 may be used to indicate the center deviation degree: 0 indicates The center of the cell is less than or equal to 100 meters from the center of the location area, and 1 indicates that the center of the cell is more than 100 meters from the center of the location area, less than or equal to 300 meters, and 2 indicates that the center of the cell is more than 300 meters from the center of the location area, less than or equal to 500 meters. 3 indicates that the center of the cell is more than 500 meters from the center of the location area, less than or equal to 700 meters, and so on.

b. In step 1505, the terminal may compare the central deviation value of the candidate cell in each location area of the candidate cell, and select a location area with a small center deviation as the target location area for location update.

After the target location area is determined by the above two methods, it is ensured that the terminal is placed in a position closer to the center of the location area as much as possible after the location is updated, that is, the terminal is placed in the center of the location area as much as possible.

Similarly, the cell broadcast message may also include a minimum distance reference value from the cell center to the boundary of each location area. The reference value may be an actual distance value or a boundary deviation degree information. For example, 0~ may be used. A total of 16 values are used to indicate this boundary deviation: 0 indicates that the minimum distance from the center of the cell to the boundary of the location area is less than or equal to 100 meters, and 1 indicates that the minimum distance from the center of the cell to the location boundary is greater than 100 meters, less than or equal to 300. m, 2 indicates that the minimum distance from the center of the cell to the boundary of the location area is greater than 300 meters, less than or equal to 500 meters, 3 Indicates that the minimum distance from the center of the cell to the boundary of the location area is greater than 500 meters, less than or equal to 700 meters, and so on. In this way, when determining the target location area, the location of the cell center distance location zone boundary, the location zone corresponding to the largest minimum value may be selected as the target location zone, or the location zone corresponding to the maximum boundary deviation degree may be selected as the location zone. Target location area. That is, the location area that is the farthest from the center of the cell is selected as the target location area, so that the terminal after the location update can be placed in the heart of the location area as much as possible. Here, the distance between the location area boundary and the cell center is the minimum value of the cell center to the location area boundary.

Of course, in practice, the minimum distance between the boundary of the cell and the boundary of the location area can also be used as the boundary deviation degree. Similarly, when the target location area is determined, the location area with the largest degree of boundary deviation can be used as the target location area. When the cell boundary intersects or overlaps with the boundary of the location area, the degree of deviation is zero. Here, when the cell boundary is outside the boundary of the location area, it can also be agreed that the deviation value is also 0 or a negative value, for example, -1.

The method flow of this embodiment can also be implemented in the system shown in Fig. 14.

釆 Using the above strategy to select the location area can ensure that the terminal is in the center of a certain location area after cell reselection, thereby greatly reducing the possibility of frequent location update caused by the back and forth movement of the terminal.

In practice, in order to reduce the consumption of the target location area when the terminal performs location update, the cell broadcast message may directly inform the terminal of the location area range that should be selected when determining the target location area, which may be through multiple location areas broadcasted in the cell. In the identification, a certain number or a certain location area identifier is directly designated as a candidate location area identifier to narrow the range of the terminal selection target location area. For example, the location area corresponding to a certain location area identifier is directly used as the candidate location area, so that when determining the target location area identifier, the terminal directly uses the candidate location area as the target location area, thereby reducing the terminal's determination of the target location area. The resulting consumption. Here, for convenience of description, a candidate location area in a location area in which one cell is located is used as a primary location area, and those non-candidate location areas in a location area in which a cell is located are used as a secondary location area. When the location area information is stored in the cell configuration information, a primary and secondary label may be added to distinguish which location areas in the location area where a cell is located as the primary location area, and which location areas are the secondary location areas. Referring to FIG. 4, as shown in the following Table 6, when the primary subscript "^ is 0", it indicates that the location area corresponding to the location area identifier is the main location area of the cell, and when the primary substandard "^" is 1, the location area is indicated. Identifying the corresponding location area as the secondary position of the cell Set zone

Table 6

As can be seen from Table 6, when the primary location area is configured for a cell, the location area that brings the cell closer to its center zone is generally selected as the primary location area of the cell. Of course, in practice, the primary location area of a cell can also be configured according to other factors.

In practice, the primary location area identification information and the secondary location area identification information may also be stored in different storage blocks. For example, if the number of primary location area identifiers is constant, the primary location area identification information is placed in front of a list, and the secondary location area identification information is placed after the list. Referring to FIG. 4, as shown in the following Table 7, it is assumed that among the respective location areas in which a cell is located, only one location area is the primary location area of the cell, so that the primary location area identifier of the cell is placed in front, and the secondary The location area identifier is placed after the primary location area identifier of the cell.

Table 7

When the cell broadcasts the primary location area identifier and the secondary location area identifier, the primary location area identifier and the secondary location area identifier are distinguished. For example, the depositor according to the above-mentioned main location area identifier and sub-location area identifier For example, the primary location identifier is used to distinguish whether each location area corresponding to each location identifier of the broadcast is a primary location area or a secondary location area, so that the terminal can distinguish the primary location area identifier and the secondary location area identifier according to the primary secondary label. Or different data blocks are used to distinguish the primary and secondary location areas. For example, the primary and secondary location area identifiers are included in one broadcast message, and the primary location area identifier is placed in front of the secondary location area identifier. Thus, the terminal defaults to the first one. The location area corresponding to the location area identifier is the main location area.

When the cell broadcasts the primary location area identifier and the secondary location area identifier, the distinction between the primary location area identifier and the secondary location area identifier may also use different messages to separately broadcast the primary location area identifier and the secondary location area identifier, and the terminal according to different messages. The code value distinguishes between the primary location area identifier and the secondary location area identifier.

When determining whether a cell belongs to a location area, the terminal may first acquire a primary location area identifier and/or a secondary location area identifier where the cell is located; and determine whether the location area is in a location area corresponding to the primary location area identifier or Whether it is in the location area corresponding to the sub-location area identifier, if yes, the cell is in the location area, otherwise, the cell is not in the location area; or, determining whether the location area identifier of the location area is included in the main area In the location area identifier or the sub-location area identifier, if yes, the cell is in the location area, otherwise, the cell is not in the location area.

When the terminal is not in the current location area, the terminal needs to determine the target location area. When determining the target location area, the terminal may first parse the primary location area identification information from the broadcast signal of the candidate cell, and then determine the target location area according to the primary location area identification information. When there is only one primary location area identifier, the primary location area can be directly used as the target location area. That is, when the terminal reselects the cell, if it is determined that one cell is the candidate cell, and the primary location area identifier of the cell is only one, the terminal may directly determine the location area corresponding to the primary location area identifier as the target. Location area. When the terminal has not determined that the candidate cell is the cell to be reselected, the terminal may determine whether the primary location area of the candidate cell covers the current cell of the terminal, that is, the secondary location area identifier of the current cell of the terminal. Whether the primary location area identifier of the candidate cell is included, if yes, the candidate cell may be selected as the target cell, and the primary location area of the candidate cell is used as the target location area, and cell reselection and location update are performed. If the secondary location area identifier of the current cell in the terminal does not include the primary location area identifier of the candidate cell, the terminal may not directly determine the candidate cell as the target cell for cell reselection, and the terminal may further determine Whether the signal quality of the candidate cell is obvious due to the signal quality of the current cell, which can pass a signal The quality parameter difference is determined. If the signal quality of the candidate cell is significantly better than the current cell, the terminal may consider the candidate cell as the target cell for cell reselection and the main location area of the candidate cell as the target location area. Make a location update. Certainly, when determining whether to use the candidate cell as the target cell for cell reselection, the service load parameter of the candidate cell may be further referenced, and the service load parameter value may be broadcasted by the cell broadcast message, and the terminal obtains the candidate by parsing the message. The traffic load of the community.

The current location area identification information is saved in the terminal. When the terminal reselects the cell, when it is determined that the to-be-selected cell is not in the current location area, the target location area is determined from the main location area where the candidate cell is located, and the location is updated. The base station to which the to-be-selected cell belongs stores the identification information of the primary location area and the identification information of the secondary location area where the candidate cell is located in the configuration information of the candidate cell, where the base station is located in the candidate cell The identification information of the primary location area and the identification information of the secondary location area are broadcasted; the terminal may receive the primary location area identification information and the secondary location area identification information.

Determining, by the terminal, whether the current location area identifier is included in the primary location area identifier information and the secondary location area identifier information, and if yes, determining that the candidate cell is in the current location area; otherwise, determining that the candidate cell is not In the current location area.

Before determining the target location area from the primary location area where the candidate cell is located and performing the location update, the terminal may further determine whether the current cell is in the primary location area, and if yes, perform the determining the primary location area as the target. The location area performs location update operation. Otherwise, whether to perform cell reselection according to the candidate cell and perform location update according to the candidate cell signal quality or the candidate cell service load amount is determined.

When the terminal reselects the cell, the location update is performed, and the target location area identifier information is sent to the call center, and the call center receives the target location area identifier information sent by the terminal, and the current location area of the terminal is set as the target location area identifier information. The specified location area. After the terminal successfully updates the location area, the target location area identifier information is saved as the current location area identification information.

In the cell configuration information, the primary location area identifier and the secondary location area identifier information may be configured in the base station to which the cell belongs during the network construction period, or may be in the base station controller of the base station or its corresponding paging center according to the cell. Identification information is configured. After the base station is powered on, the primary location area identifier information and the secondary location area identifier information of the corresponding cell may be obtained from the corresponding base station controller or its corresponding paging center, for example, according to the cell identification information or the base station identification information. Correct The base station controller or its corresponding paging center should acquire the primary location area identification information and the secondary location area identification information of the corresponding cell.

In the primary and secondary location area mechanisms, the primary location area is used by the terminal to quickly determine the target location area, and, in most cases, when configuring the primary location area for one cell, only one primary location area is configured. This can adapt to the location update in the case of fast terminal movement and improve the location update success rate.

After the above various location areas are configured, there may be such a situation: A certain location area covers more than two cells under the control of the call center equipment. At this time, if the terminal paging is performed by the conventional paging mode, there may be a situation that some cells in the coverage area of the location area do not have a paging terminal. Therefore, the paging policy needs to be changed so that all the cells covered by the location area initiate paging to the terminal.

Figure 16 is a flow chart of an embodiment of a paging method for the above case. It is assumed that in the present embodiment, the location area L covers the cells under the control of two call center devices, namely, the call center device A and the call center device B. As shown in Figure 16, the method includes:

Step 1601: The corresponding relationship table between the location identifier and the cell identifier, the location area identifier and the call center device correspondence table, and the user identifier and the location area identifier correspondence table are saved in the cell-related call center equipment covered by the location area L.

In this step, the cell-related call center devices covered by the location area L are the call center device A and the call center device 8. Generally, in a call center device, only a correspondence table between the corresponding location area identifier and the cell under the control of the call center device is configured. That is, in the correspondence table between the location area identifier of the A device and the cell identifier, the cell identifier under the control of the B device is generally not required to be configured, and the correspondence between the location area identifier of the B device and the cell identifier is not You need to configure the cell ID under the control of the A device. In this embodiment, since the same location area covers more than one cell under the control of the call center device, the corresponding relationship between the call center device and the location interval is further configured in the call center device. The call center device may be represented by the device address. Therefore, the correspondence between the location area identifier and the call center device in this embodiment is a correspondence between the location area identifier and the call center device address, and the call center device address may be The destination signaling point code or IP address of the call center device. When the mapping between the location area identifier and the call center device address is configured, the address of the call center device may not be configured, and only the addresses of other call center devices associated with the location area may be configured. For example, call center equipment A The location correspondence between the location area L and the call center device B is configured, and the address correspondence between the location area L and the call center device A is no longer configured. Similarly, in the call center B, only the location area L and the call center device are configured. The address correspondence of A. The subscriber identity may be the IMSI or TMSI of the mobile subscriber in the GSM system for the GSM system.

Assume that the call center device A wants to page the user at a certain time. The following operations are performed: Step 1602: The call center device A searches for the user identifier and the location area identifier correspondence table saved by the call center device A according to the user identifier, and obtains the corresponding location area identifier.

Step 1603: The call center device A obtains corresponding cell information according to the location area identifier obtained in step 1602 from the corresponding relationship table between the location area identifier and the cell identifier, and performs the cell information according to the user identification information and the acquired cell information. Paging.

Step 1604, the call center device A obtains, according to the location area identifier obtained in step 1602, the other call center device addresses associated with the location area identifier from the location area identifier and the call center device address correspondence table, that is, the call center device B. address.

In step 1605, it is determined whether the address of the call center device B is obtained. If not, the process ends. Otherwise, steps 1606-1607 are performed.

Step 1606: Paging the call center device B according to the obtained address of the call center device B.

In this step, the paging information includes location area information and user identification information.

Step 1607: The call center device B obtains corresponding cell information from the corresponding relationship table between the location identifier and the cell identifier configured by the call center device, and pages the cells according to the user identifier information and the acquired cell information. .

In this embodiment, steps 1603 and 1604 are sequentially performed in sequence, and in fact, steps 1603 and 1604 can be performed in any order or simultaneously.

In this embodiment, the location area identifier and the call center device address correspondence table may be directly configured in the user identifier and the location area identifier correspondence table, or may be independent of the user identifier and the location area identifier correspondence table. When directly configuring the user relationship and the location area identifier correspondence table, the method may be: adding a domain in the user identifier and the location area identifier correspondence table, and the call center equipment related to the location area in the domain The address is recorded, so that when the location area identifier is obtained according to the user identifier, the corresponding location area identifier is obtained. Call center device address.

With the paging method described above, when a location area covers a plurality of cells controlled by the call center device, the purpose of paging the user in all d areas under the coverage of the location area can be achieved.

It can be seen that the foregoing embodiment of the present invention provides a method for configuring a location area, a method for broadcasting a location area, a paging method, a location update method, and a system. The embodiment of the present invention provides a method for reselecting a cell. A comprehensive solution for frequent location update problems, enabling users to select the most suitable camping cell according to actual needs, thus ensuring the access performance of the terminal, and reducing the location in a densely populated urban area with a small cell radius. The number of terminal location updates at the junction of the district.

The above are only the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A location update method, wherein the terminal stores the current location area identifier information, and the base station to which the candidate cell belongs stores the main location area identifier of the candidate cell in the configuration information of the candidate cell and Sub location area identification, the method includes:

When the terminal reselects the cell, it is determined whether the candidate cell is in the current location area. If not in the current location area, the target location area is selected from the location area corresponding to the primary location area identifier where the candidate cell is located, and the location is updated.

2. The method according to claim 1, wherein the determining whether the candidate cell is in a current location area is determined by the following steps:

The method according to claim 1 or 2, wherein before determining the target location area and performing location update, determining whether the current cell is in the primary location area, and if yes, executing the primary location area The operation is determined as the target location area and the location update is performed. Otherwise, whether the cell reselection according to the candidate cell is performed and the location update operation is performed according to the signal quality of the candidate cell or the traffic volume of the candidate cell.

4. The method according to claim 1, wherein the step of performing location update comprises:

The call center receives the target location area identification information sent by the terminal, and sets the current location area of the terminal to the location area specified by the target location area identification information.

5. The method according to claim 4, wherein the terminal saves the target location area identification information as current location area identification information.

A location update method, wherein the terminal saves current location area identifier information, and the method includes:

The terminal receives the location area identifier information of the cell broadcasted by the base station and saves the location area; when the terminal reselects the cell, when determining that the candidate cell is not in the current location area, determining the target location area from the location area where the candidate cell is located , for location updates.

7. The method according to claim 6, further comprising:

At least two mutually bordered location areas are pre-configured on the call center.

The method according to claim 6, wherein the determining the target location area from the location area where the candidate cell is located includes:

The target location area is determined from a location area where the candidate cell and the current camping cell are located together.

9. The method according to claim 8, further comprising:

Before determining the target location area from the location area where the candidate cell and the current camping cell are located together,

When it is determined that the location area where the candidate cell is located is one, it is determined whether the current camping cell is in the location area of the candidate cell, and if yes, the location area of the candidate cell is used as the target location area to perform location area update;

When the candidate cell is in more than one location area, the target location area is determined from the location area where the candidate cell and the current camping cell are located together, and the location update is performed.

The method according to claim 8 or 9, wherein when the location area where the candidate cell and the current camping cell are co-located, the location area is directly used as the target location area.

The method according to claim 8 or 9, wherein when the candidate cell and the current camping cell are in a location area more than one, the candidate cell and the current camping cell are selected together. One of more than one location area is used as the target location area.

The method according to claim 8 or 9, wherein when the candidate cell and the current camping cell do not have a location area in common, the location area or the plurality of location areas where the candidate cell is located is selected. One of them is used as the target location area.

The method according to claim 11, wherein the selecting one of the more than one location areas in which the candidate cell and the current camping cell are located as the target location area is, from the candidate cell and the current A selected one of the more than one location areas in which the camping cells are common is used as the target location area.

The method according to claim 11, wherein the selecting one of the more than one location area in which the candidate cell and the current camping cell are common as the target location area means that the terminal is currently relative to the terminal. The positional relationship of the location area of the common location determines a target location area, where the location relationship is a distance reference value of the terminal currently relative to the center of the location area.

The method according to claim 6, wherein the determining the target location area from the location area where the candidate cell is located comprises:

The target location area is determined according to the location relationship of the terminal with respect to the location area in which the candidate cell is located, and the location relationship is a distance reference value of the terminal currently relative to the center of the location area.

The method according to claim 6, wherein the determining the target location area from the location area where the candidate cell is located further includes:

After the target location area is selected from the location area in which the candidate cell is located, the location update is performed.

The method according to claim 6, wherein the performing the location update comprises: the call center receiving the target location area identification information sent by the terminal, and setting the current location area of the terminal to the target location area identification information. The specified location area.

18. The method according to claim 17, wherein the terminal saves the target location area identification information as current location area identification information.

19. A location update system, the system comprising: a call center, a base station, and a terminal, wherein:

The call center is configured to configure at least two mutually overlapping location areas;

The call center responds to the location update initiated by the terminal.

The system according to claim 19, wherein the call center is configured to update, according to the target location area identifier sent by the terminal, the current location area identifier of the terminal saved by itself.

The system according to claim 19, wherein the base station is configured to receive a location area identifier of a cell managed by the base station and sent by the call center, and broadcast the broadcast message of the corresponding cell. .

The system according to any one of claims 19 to 21, wherein the terminal comprises a receiving module, a main control module and a transmitting module, The receiving module is configured to receive location area identifier information sent by the base station, and send the information to the main control module;

The main control module determines, according to the location area identifier information sent by the receiving module, whether to perform location update when performing cell reselection; and when determining to perform location update, the candidate cell and the current camping cell are jointly associated with And sending, by the sending module, the received target location area identifier to the call center.

23. A paging method, characterized in that a location area is configured on different call centers, the method comprising:

A method for configuring a mutual edge location area, the method comprising: configuring at least two location areas in a call center, and configuring at least one cell in the first location area and the second location area at the same time;

A method for broadcasting a location area by a cell, the method comprising: storing, in a base station to which the cell belongs, a plurality of location area identification information of the cell; the base station is located at the cell The identification information of the location areas is broadcasted once by the cell or divided into multiple broadcasts.

The method according to claim 25, wherein the plurality of location area identification information includes at least one primary location area identifier and at least one secondary location area identifier; When the location area identification information is broadcasted once by the cell or divided into multiple broadcasts, the primary location area identifier and the secondary location area identifier are further distinguished.

The method according to claim 26, wherein the distinguishing between the primary location area identifier and the secondary location area identifier is performed by a primary secondary label, or according to the primary location area identifier or the secondary location area. The location in the message is distinguished by the identity, or by the message code value of the different broadcast message.

The method according to claim 26, further comprising: before saving the identification information of the plurality of location areas in which the cell is located, further comprising:

After the base station is powered on, the identification information of the multiple location areas in which the cell is located is obtained from the call center or the base station controller.

The method according to claim 26, wherein the identification information of the corresponding location area where the neighboring cell of the cell is located is saved in the base station to which the cell belongs;

The cell broadcast message further includes identification information of a corresponding location area in which the neighboring cells are respectively located.

The method according to claim 29, further comprising: before saving the identification information of the corresponding location area where the neighboring cell of the cell is located, further comprising:

After the base station is powered on, the identifier information of the corresponding location area where the neighboring cell of the cell is located is obtained from the call center or the base station controller.

The method according to any one of claims 27 or 29, wherein the call center or the base station controller stores the correspondence between the location area identification information in which the cell is located and the cell identity.

32. A method for determining a location area where a cell is located, and the method includes:

Determining whether the location area is in a location area corresponding to the primary location area identifier or in a location area corresponding to the secondary location area identifier, and if yes, the cell is in the location area, otherwise, the cell is not in the location Area;

Or determining whether the location area identifier of the location area is included in the primary location area identifier or the secondary location In the area identifier, if yes, the cell is in the location area, otherwise, the cell is not in the location area.

33. The method of claim 32, further comprising:

The primary location area identification information is parsed from the broadcast message of the candidate cell, and the target location area is determined according to the primary location area identification information.