CN1581745A - System message 1 label value distributing method - Google Patents

Abstract

The present invention proposes a method for configuring the label value of system message 1, which is suitable for wideband code division multiple access systems. First, the operation and maintenance center completes the configuration of the label value range of system message 1 corresponding to the location area code or routing area code , and send it to the background database for storage; when establishing a cell, the foreground sends a message to the background database according to the cell ID to obtain the tag value range of the system message 1 corresponding to the location area code or routing area code of the cell; then take it out from the tag value range One value is used as the label value of the system information 1 of the cell, and is sent to the base station through the system information update request message, and broadcast in the cell by the base station. According to the network planning, it can be ensured that the cells within the same LAC or RAC have the same range of system information 1 label values, and the adjacent cells in different LACs or RACs will not have the same system information 1 label value.

Description

A method for configuring tag values of system message 1

technical field

The invention relates to the technical field of code division multiple access mobile communication, in particular to the technical field of cell parameter configuration.

technical background

Code Division Multiple Access (CDMA) is a spread spectrum mobile communication technology. Spread spectrum communication technology was mainly used in military communication in the early stage, and it will also be widely used in civilian communication due to its excellent performance. Now there are already commercial CDMA cellular mobile communication systems running in the telecommunication network.

To increase the capacity of mobile communication systems, cellular systems are commonly used. In a cellular mobile communication system, the entire network is composed of several cells, and different cells have different configuration attributes, such as the PLMN area to which the cell belongs, the available channel types of the cell, and so on. These attributes are usually only related to the cell, and have little to do with different users in the cell. In order to effectively improve the efficiency of network transmission of this type of information, various mobile communication systems generally adopt the "broadcast" method, that is, add a broadcast to the cell. Channel, which periodically broadcasts the general information of the cell. The mobile station entering the cell can obtain the basic information of the cell by receiving the broadcast channel, so as to complete the general control of the users of the cell by the network side.

For the user equipment (User Equipment, UE), each system information block has its own attributes: such as the validity range (Area scope), the state in which the UE considers the system information block to be valid (UE mode/state when block is valid), in what state the UE reads the system message block (UE mode/state when block is read), scheduling information (Scheduling information) and modification method (Modification of system information).

For the validity range of the system message block, it refers to the range within which the system message block is valid. There are only two validity ranges for all system message blocks in WCDMA: PLMN and CELL. If the validity range of a system information block is CELL, then the UE will only consider the content of the system information block to be valid in this cell, and when the UE selects another cell, it will automatically consider the content of the system information block The content is invalid, and re-read the system information block of the latest cell; if the validity range of the system information block is PLMN, then the UE will consider the system information block to be valid in the entire PLMN, when the UE selects a After the new cell, the label value of the system information block in the new cell will be compared with the label value of the system information block saved by the UE in the original cell. If the two label values are the same, then the UE will consider that the system information block is in the The content of the two cells is consistent, and the content of the system information block will not be read; if the two tag values are not the same, then the UE will think that the system information block is different in the two cells , and will re-read the content of the system information block in the new cell.

Among all system messages, the validity range of system message 1 is PLMN. According to the above description, when UE reselects from one cell to another cell, it will read the tag value PLMN VALUE TAG of system message 1 of the cell , and then compare it with the saved tag value to decide whether to read the content in system message 1. A large number of non-access stratum (NAS) parameters are broadcast in system message 1, such as: Location Area Code (Location Area Code, LAC) or Routing Area Code (Routing Area Code, RAC) and some idle mode and connection mode timer etc. According to network planning, one LAC or RAC may include many cells, that is, many adjacent cells have the same LAC or RAC. In order for the UE to let the CN know where it is, such as which LAC or which RAC it is in, then when the UE enters another LAC or RAC from one LAC or RAC, it needs to perform a location update or route update, so that the CN will The location of the UE can be known, so that the UE can be successfully paged. In network planning, when two adjacent cells have different LACs or RACs, if a UE reselects from one cell to another, a location update or route update is required. But how does the UE know that the LACs or RACs of the two cells are different? Only after the UE reads the content of system information 1 of another cell will it know that this cell is different from the original cell. Therefore, different tag values PLMN VALUE TAG must be configured for these two cells.

But how to configure different system message 1 tag values for different cells? There is no relevant description and implementation method in the existing protocol, and there is no clear solution to this problem in the industry at present.

One technical solution is that according to the description in 3GPP protocol TS25331, the tag value PLMN VALUE TAG of system message 1 ranges from (1 to 256), and any one of 1 to 256 can be assigned to system message 1 for each cell. One scheme of is to randomly assign 1 to 256. Each time the system information is updated, a value is randomly selected from (1-256) and assigned to the system information 1 of the cell as the label value of the system information 1 of the cell. The following "tag value PLMN VALUE TAG" is collectively referred to as "tag value". The disadvantages of this technique are obvious. First, the average allocation for each cell may cause adjacent cells with different LAC or RAC to have the same label value, so that when the UE reselects from one of the cells to After another cell, it is found that the label value of the system message 1 of the two cells is the same, so it will not read the content of the system message 1, and does not know that the LAC or RAC has been replaced, and the CN will not know that the UE has If the location is changed, the CN cannot page the UE. Second, if two cells have the same LAC or RAC, and the parameters of other system message 1 are also the same, then adopting this solution may cause the two cells to have different label values. This will cause the UE to re-read the content of the system message 1 when it moves from one cell to another cell, which will cause unnecessary waste of time and increase the power consumption of the UE. Third, for the same cell, when the other content in system information 1 is updated, due to the use of this random method, it is likely to cause the same label value twice before and after, so that the resident in this cell The UE in the cell thinks that the content of the system information 1 has not been updated, and will not read the content of the new system information 1.

Another technical solution is that each cell is cyclically applied from (1 to 256). For example, after the cell has just been established, the tag value of the system message 1 of the cell is 1, and the tag value is increased by 1 every time it is updated. All the way to 256, then 1 again. This method also has this inherent defect. First, if each cell sets the system message 1 label value from a certain value when it is established, such as 1, then after these cells are established together, the system message 1 label value of all cells is the same Yes, if two adjacent cells have different LAC or RAC, then the label value is also the same. For the UE, there may still be situations where location or routing updates are not performed. Second, for several cells with different LAC or RAC, if for some reason, the system message 1 of one of the cells is frequently updated (of course this is an extreme situation, but there is also this risk ), then the tag value of system message 1 of this cell may be the same as the tag value of system message 1 of other cells if it is updated for a period. This will still cause the UE to move in different LAC or RAC cells without sending location update and routing area update.

Contents of the invention

The purpose of the present invention is to propose a method for configuring the label value of Wideband Code Division Multiple Access (WCDMA) system message 1, which can configure different label value ranges of system message 1 for each LAC or RAC according to network planning, so as to ensure that the same Cells within a LAC or RAC have the same range of SI1 label values, and adjacent cells in different LACs or RACs have different SI1 label values.

A method for configuring a label value of a system message 1, applicable to a wideband code division multiple access system, comprising the following steps:

a The operation and maintenance center (Operation and Maintenance Center, OMC) completes the configuration of the label value range of the system message 1 corresponding to the location area code (Location Area Code, LAC) or routing area code (Routing Area Code, RAC), and sends it to Background database storage;

b When establishing a cell, the front desk sends a message to the background database according to the cell identifier to obtain the tag value range of the system message 1 of the location area code or routing area code corresponding to the cell;

c Take a value from the label value range obtained in step b as the label value of the system information 1 of the cell, and send it to the base station through the system information update request message, and broadcast it in the cell through the base station.

After the step c, the following steps are also included:

d. If the operation and maintenance center updates the tag value range of the system message 1 corresponding to a location area code or routing area code, it will notify the database to update the tag value range of the system message 1 corresponding to the location area code or routing area code;

The e-operation and maintenance center notifies the front desk through a message, and the front desk updates the label value range of the system message 1 corresponding to all cells within the code range of the location area code or routing area according to the content in the message of the operation and maintenance center, and modifies the label of the system message at the same time value, and send it to the base station through a system message update request message, and broadcast it in the cell through the base station.

In the step a, the operation and maintenance center configures the label value range of the system message 1 corresponding to the location area code or routing area code while configuring the location area code or routing area code.

The background database saving in the step a further includes: the background database corresponds the label value range of the system message 1 corresponding to the location area code or the routing area code in the data table; after the database completes the configuration of all data, it sends a response message to Operation and Maintenance Center.

In the step c, if the cells with the same location area code or routing area code have the same other parameters in the system information 1, then the same value should be taken from the label value range as the label value of the system information 1 of these cells.

After the database completes the data update in the step d, it sends a response message to the operation and maintenance center.

By adopting the present invention, it is convenient for users or planners to dynamically configure and modify the tag value range of the system message 1 corresponding to the LAC or RAC according to needs.

It can ensure that the UE will send location area update or routing area update when moving between cells in different LACs or RACs, so as to ensure that the CN knows the definite location of the UE.

It can improve the call success rate of the system, reduce the message volume of IU interface and UU interface, and reduce the power consumption of UE

Description of drawings

Fig. 1 is a flow chart of tag value configuration structure of the present invention;

Fig. 2 is a schematic diagram of the system planning of the present invention.

Detailed ways

The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

As shown in FIG. 1 , in the OMC of the RNC, planners (or users) establish LACs and RACs required by the system through the OMC according to planning requirements. When configuring LAC or RAC, configure the label value range of system message 1 corresponding to LAC or RAC. After the OMC configuration is completed, it will send a message to the background database to map the label value range of LAC or RAC to the data In the table, after the database finishes configuring all the data, it sends a response message to the OMC.

To establish a cell according to the plan, the OMC sends the cell establishment to the foreground. During the cell establishment process in the foreground, the foreground sends a message to the database according to the cell ID to obtain the LAC (if it is a CS domain cell) or RAC (if it is a PS cell) corresponding to the cell. range of tag values for sysmessage 1 in the domain).

According to the label value range of the system message 1 corresponding to the cell, take a value from the range (or use the smallest one, or use the largest one, or use it randomly, etc., it is necessary to ensure that the cells with the same LAC or RAC if If the parameters of other system information 1 are the same, you need to configure the same label value), use this value as the label value of the system information 1 of the cell, and send it to NODEB through the system information update request message, and broadcast it in the cell through NODEB .

After the user updates the tag value range of system message 1 corresponding to a certain LAC or RAC, OMC sends a message to the database to notify the database to update the range of the tag value of system message 1 corresponding to the specified LAC or RAC. After the database change is completed, a message is sent Notify the OMC.

The OMC notifies the foreground through a message, and the foreground updates the label value range of the system message 1 corresponding to all cells within the LAC or RAC range according to the content in the OMC message, and at the same time modifies the label value of the system message, and each cell needs to send a system message update To the NODEB, the NODEB is required to broadcast the updated system message content in the whole cell.

According to Figure 2, we will specifically illustrate the tag value configuration of system message 1. We can see that there are three LACs, among which there are cells C0, C1, C2, and C3 in LAC1, and C0 and C1 are both PS cells, and C2 and C3 are both It is a CS cell, the cells C4 and C5 in LAC2 are both CS cells, and the cells C7 and C8 in LAC3 are also CS cells. During network planning, you can plan as follows: the label value range of system message 1 corresponding to LAC1 is (1~10), the label value range of LAC2 is (11~20), and the label value range of LAC3 is (21~30) . The two RACs in LAC1 need to be configured with different label values from those of LAC1, but they can be the same as those of LAC2 and LAC3. They can be configured as RAC1 (11-15), RAC2 as (16-22), etc. If configured in this way, according to the principle of minimum cell configuration, the range of the system information 1 label value of the CS domain cell C2 in LAC1 can only change from (1 to 10), while the range of the label value of the PS domain cell C0 is (11 ～16), the label value range of C1 is (16～22); the label value range of the two CS domain cells C4 and C5 in LAC2 is (11～20), and the CS domain cell in LAC3 The tag values of C6 and C7 range from (21 to 30).

Therefore, according to this detailed planning method, no matter whether the UE moves from a cell in LAC1 to a cell in LAC2 or to a cell in LAC3, or whether the UE moves from RAC1 to RAC2, or whether the UE moves from RAC1 to LAC1 , all the label values of the original cell and the target cell are different, so that the UE either initiates a location update or a routing area update.

The present invention can make the label value of the system message 1 of adjacent cells in different LACs or RACs never the same, thus ensuring that the UE will succeed when moving between adjacent cells belonging to different LACs or RACs Read the content in the system message 1, so as to successfully complete the location update or route update.

It can be provided to users (or service personnel) to configure different system information 1 label value ranges for each LAC or RAC according to network planning, so as to ensure that cells within the same LAC or RAC have the same system information 1 label value range. In order to make full use of the label value range of system message 1, you can also configure the same label value range for non-adjacent LACs or RACs according to the plan.

It can also provide dynamic update of the label value range of system message 1 corresponding to LAC or RAC. For example, different label value ranges have been successfully allocated to LAC or RAC during the initial planning process, but in the future expansion or deletion of LAC or During RAC, there may be two or more adjacent LACs and RACs where the label value ranges overlap. In order not to affect normal operation, the range of label values corresponding to these LACs or RACs can be dynamically changed through the operation and maintenance console. .

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technology can easily think of changes or replacements within the technical scope disclosed in the present invention. , should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (6)

1, a kind of collocation method of label value of system message 1 is applicable to broadband CDMA system, it is characterized in that may further comprise the steps:

A, operation and maintenance center (Operation and Maintenance Center, OMC) completing place district sign indicating number (Location Area Code, LAC) or Routing Area Code (Routing Area Code, RAC) configuration of the label value scope of pairing system message 1, and issue database stores;

B, when setting up the sub-district, the foreground sends message according to cell ID to background data base, obtains the label value scope of the system message 1 of pairing Location Area Code in this sub-district or Routing Area Code;

C, from the label value scope that step b obtains, take out the label value of a value, and send to the base station, in the sub-district, broadcast by the base station by the system message update request message as the system message 1 of this sub-district.

2, the collocation method of the label value of the system as claimed in claim 1 message 1 is characterized in that behind the described step c further comprising the steps of:

If d, operation and maintenance center have upgraded the label value scope of a Location Area Code or the pairing system message 1 of Routing Area Code, notification database upgraded the label value scope of this Location Area Code or the pairing system message 1 of Routing Area Code;

E, operation and maintenance center are by the message informing foreground, the foreground is according to the scope of the label value of the pairing system message 1 in all sub-districts in content update Location Area Code in the operation and maintenance center message or the Routing Area Code scope, revise the label value of system message simultaneously, and send to the base station by the system message update request message, broadcast in the sub-district by the base station.

3, the collocation method of the label value of the system as claimed in claim 1 message 1, it is characterized in that: among the described step a, operation and maintenance center in allocation position district sign indicating number or Routing Area Code, the configuration of the label value scope of the pairing system message 1 of completing place district sign indicating number or Routing Area Code.

4, the collocation method of the label value of the system as claimed in claim 1 message 1 is characterized in that database stores further comprises among the described step a: background data base with the label value scope correspondence of Location Area Code or the pairing system message 1 of Routing Area Code in tables of data; After database is finished configuration to all data, send response message to operation and maintenance center.

5, the collocation method of the label value of the system as claimed in claim 1 message 1, it is characterized in that among the described step c, sub-district with same position district sign indicating number or Routing Area Code, if other parameters are also identical in the system message 1, should from the label value scope, take out the label value of same value so as the system message 1 of these sub-districts.

6, the collocation method of the label value of the system as claimed in claim 1 message 1 is characterized in that: after database is finished Data Update in the described steps d, send response message to operation and maintenance center.

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