WO2009140914A1

WO2009140914A1 - Method and device for configuring a cell identity

Info

Publication number: WO2009140914A1
Application number: PCT/CN2009/071861
Authority: WO
Inventors: 段忠毅; 任学亮; 屈建平
Original assignee: 华为技术有限公司
Priority date: 2008-05-20
Filing date: 2009-05-20
Publication date: 2009-11-26
Also published as: CN101296515A

Abstract

A method for configuring a cell identity involves: allotting a fixed cell identity for a cell; converting the fixed cell identity to a dynamic cell identity that includes mapping relation with the fixed cell identity; the dynamic cell identity being carried in a wireless information; launching the wireless information including the dynamic cell identity to a user device by a wireless interface. Therefore, through converting the fixed Cell ID, what is launching to UE at Uu interface is the dynamic Cell ID, and even if the third party obtains the dynamic Cell ID, it will not obtains the real location information of the cell, therefore, providing illegal service through Cell ID orientation by the third party is shielded effectively. A device for configuring a cell identity is also provided corresponding to the above method in the present invention.

Description

The present invention claims the priority of the Chinese patent application filed on May 20, 2008, the Chinese Patent Application No. 200810097723.2, entitled "Method and Apparatus for Configuring a Cell Identity", the entire contents of which is filed on May 20, 2008. This is incorporated herein by reference. The present invention relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for configuring a cell identifier (Cell ID). BACKGROUND For each cell, an operator allocates a fixed Cell ID, and the UE can obtain Cell ID information from a wireless interface (Uu interface). One of the commonly used mobile positioning technologies is Cell ID based positioning technology. The so-called cell ID based positioning determines the location of the user based on the Cell ID of the cell in which the mobile station is located. The positioning accuracy of the Cell ID positioning technology depends on the radius of the cell; on the other hand, the Cell lD positioning technology does not require the positioning measurement of the mobile station, and the positioning information transmission of the wireless interface is small, so the positioning response time is short. In the process of transmitting the Cell ID to the user equipment (UE) by the UTRAN through the Uu interface, if the third party obtains the correspondence between the Cell ID and the geographical location of the cell by using the Cell ID positioning technology, it is possible to illegally provide the Cell ID-based positioning service to the UE. . SUMMARY OF THE INVENTION The present invention is to provide a method and apparatus for configuring a Cell ID to shield a third party from illegally locating through a Cell ID. To this end, the embodiment of the present invention adopts the following technical solutions:

A method for configuring a Cell ID, including: allocating a fixed Cell ID to a cell; converting the fixed Cell ID into a dynamic Cell ID, where the dynamic Cell ID and the fixed Cell ID are in a mapping relationship; The dynamic Cell ID is carried in the wireless message, and the wireless message including the dynamic Cell ID is sent to the UE through the wireless interface.

An apparatus for configuring a Cell ID, comprising: a Cell lD preset unit, configured to set a fixed Cell ID of a cell; and further comprising: a Cell ID conversion unit, configured to convert the fixed Cell ID into a dynamic Cell ID, where the dynamic The cell ID is associated with the fixed Cell lD; the wireless message assembling unit is configured to carry the dynamic Cell ID in the wireless information; and the wireless message sending unit is configured to send the wireless message that includes the dynamic Cell ID to And the base station, and instructing the base station to send the wireless message to the UE. In the embodiment of the present invention, the fixed Cell ID is converted, and the dynamic Cell ID is sent to the UE through the Uu interface. Even if the third party obtains the dynamic Cell ID, it is generally impossible to obtain the real location information of the cell. Therefore, Effectively solves the problem of third parties using Cell ID to provide illegal services. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural diagram of a UMTS system according to an embodiment of the present invention;

2 is a flowchart of a method for configuring a Cell ID according to an embodiment of the present invention;

3 is a flowchart of Embodiment 1 of a method for configuring a Cell lD according to an embodiment of the present invention;

4 is a flowchart of Embodiment 2 of a method for configuring a Cell lD according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of Embodiment 1 of an apparatus for configuring a Cell lD according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of Embodiment 2 of an apparatus for configuring Cell lD according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION Functionally, the Land Mobile Communication System (UMTS) mainly includes a core network (CN) and a radio access network (RAN). The core network handles all voice calls, data connections and exchanges within the UMTS system, as well as connections and routing to other external networks. The wireless access network performs all wireless related functions. These two subnets together with the UE constitute a complete UMTS system, and its structure is shown in Figure 1. The UTRAN performs the function of the radio access network, which in turn includes a radio access controller (RNC) and a base station (Node B), and the RNC and the NB communicate through the Iub interface, and the interface between the UTRAN and the core network is Iu. The interface with the UE is Uu. The Uu interface is also called a wireless interface. It is mainly used to establish, reconfigure, and release various 3G radio bearer services. Fully open interface.

Referring to FIG. 2, a flowchart of a method for configuring a Cell ID according to an embodiment of the present invention includes:

S201: assign a fixed cell ID to the cell;

S202: Convert the fixed Cell ID to a dynamic Cell ID, where the dynamic Cell ID has a mapping relationship with the fixed Cell ID.

S203: The dynamic Cell ID is carried in the wireless message, and the wireless message including the dynamic Cell ID is sent to the UE through the Uu interface. In the method of configuring the Cell ID, the dynamic Cell ID maintains a mapping relationship with the fixed Cell ID. The Iu interface and the Iub interface still use the fixed Cell ID, and only the dynamic Cell ID is used on the Uu interface. When the dynamic Cell ID changes, the latest dynamic Cell ID is broadcast in the cell by updating the wireless message.

It can be seen that the embodiment of the present invention converts the fixed Cell ID in the prior art, and sends the converted dynamic Cell ID to the UE through the Uu interface, so that even if the third party adopts the Cell ID positioning technology, the obtained It is a dynamic Cell ID. It is unlikely that the correct relationship between the Cell ID and the geographic location of the cell will be obtained. It is difficult to illegally provide the Cell lD-based positioning service to the user.

3 is a flowchart of a method for configuring a Cell ID according to Embodiment 1 of the present invention, including:

S301: The RNC allocates a fixed Cell ID to each cell;

Here, it is assumed that the fixed Cell ID assigned to the cell is ^.

S302: Set a conversion function of the fixed Cell lD to the dynamic Cell lD in the RNC. Preferably, the conversion function is a function that changes randomly with time. For example, for a cell, the conversion function is:

t) = f {x, t) Equation 1 where, the current time; ^x i : fixed Cell lD of the cell; dynamic Cell ID of the cell i transformed over time. With Equation 1, a mapping relationship between 0 and one-to-one can be guaranteed at any time. In an embodiment, the RNC may set a number of Cell IDs as an alternate set of dynamic Cell IDs. In this embodiment, (0 is cell i transforms the dynamic Cell ID selected from the candidate set over time.

S303: In the RNC, the fixed Cell ID is converted into a dynamic Cell ID by using the conversion function set above; still taking the cell '' as an example, converting x _; to (0).

S304: The RNC carries the dynamic Cell lD in the wireless message; specifically, the wireless message may refer to system information, preferably SIB3 or SIB4. SIB3 and SIB4 are system messages sent by the UTRAN system, and are broadcasted for the entire cell, not for a specific UE; wherein, the UE in the idle state receives the system message of the SIB3, and the UE in the connected state receives the system message of the SIB4; The UTRAN system broadcasts these two system messages and does not need to know the status of a particular UE. See Table 1 for the SIB3 message structure diagram. SIB3 includes multiple information fields, such as: SIB4 Indicator, UTRAN mobility information elements, Cell Identity, Cell Selection/Reselection Parameters. (Cell selection and re-selection info), and Cell Access Restriction.

Table 1 Domain Type Domain Parameters

SIB4 Indicator (SIB4 Indicator)

UTRAN mobility information elements Cell Identity Cell selection and re-selection info Cell Identity Cell Access Restriction In the existing solution, the Cell Identity in the SIB3 is assigned a fixed Cell ID: X is different from the above, in the embodiment of the present invention, the cell identity (Cell Identity) of the SIB3 is assigned. Dynamic Cell ID: 1^.(

In addition, the wireless message may also be a radio bearer message for a specific UE, such as a Radio Bearer Setup (RB Setup), a Radio Reconfiguration (RB Reconfigure), and a Radio Bearer Release (RB Release). For a specific UE's wireless message, the cell with the fixed Cell ID is replaced with a dynamic Cell ID.

S305: The RNC sends a wireless message carrying a dynamic Cell ID to the Node B.

S306: The Node B forwards the wireless message to the UE. It should be noted that the Node B may not need to process the wireless message, but only forwards it to the UE. In other words, in the embodiment of the present invention, only the fixed Cell ID to the dynamic Cell ID is required to be converted on the RNC side. No changes are required on the Node B and UE side, and the implementation is very simple. In the prior art, the third party may obtain the fixed cell ID in the UTRAN to send the wireless message to the UE, thereby determining the cell location information, and then providing the user in the cell with the illegal service. In the embodiment of the present invention, on the RNC side. The fixed Cell ID is converted, and the dynamic Cell ID is sent to the UE on the Uu interface. Even if the third party obtains the dynamic Cell ID, it is impossible to know the real location information of the cell (the location information of the cell is The fixed Cell ID corresponds to, therefore, effectively shielding third parties from using the ID ID to provide illegal services. Moreover, as previously analyzed, the embodiment of the present invention implements the cartridge, and only needs to make minor changes to the RNC side, and does not need to be modified on the Node B and UE sides.

A specific example is given below for the conversion function of S302 in Fig. 3.

Make the following assumptions:

1. Assume (the period of 0 change is Δ, that is, it is updated every time Δ is started from a certain time.

2. Assume that ^ is the optional Cell lD corpus of the Uu interface, ^ (0 is the set of the Uu interface Cell IDs of all the actual configured cell mappings at the moment, Sb (^ is the Cell ID that has not been mapped to the Uu interface at the moment) The set, ie, Sa(t) Sb(t) = S .

At + Δ, randomly select an element from Sb(t) and update the following formula:

Y _i (t + ^ = sb formula 2

Sa(t + Δ) = Sa(t) - Y _i (t) + sb Equation 3 Sb(t + Δ) = Sb(t) -sb + Y t) Equation 4 At + 2Δ, repeat the formula 2 ~ 4, The Cell ID of the Uu interface corresponding to the cell shows the characteristics of random change.

For clarity, the following is a more practical example.

Assumption:

1) The set of fixed CelllD is: {1, 2, 3, 4, 5};

2) System startup time Uu port dynamic Cell ID is the same as fixed cell ID;

3) The optional CelllD corpus S is: {1, 2, 3, 4, 5, 6, 7, 8, 9};

4) Δ is 1 hour.

The situation at the start of the system:

Sa(0): {1, 2, 3, 4, 5}

Sb(0): {6, 7, 8, 9}

One hour after the system starts, the Uu port is dynamically changed for the fixed Cell 1:

Randomly select an element sb from Sb(0), assuming 7, then

Sa (l hours): {7, 2, 3, 4, 5}

Sb (l hours): {6, 1, 8, 9}

The dynamic Cell Id corresponding to the fixed Cell 1 is changed from 1 to 7;

The Uu port dynamic change is performed on the fixed Cell 2 2 hours after the system starts:

Randomly select an element sb from Sb (l hours), assuming 9, then Sa (2 hours): {7, 9, 3, 4, 5}

Sb (2 hours): {6, 1, 8, 2}

The dynamic Cell Id corresponding to Fixed Cell 2 is changed from 2 to 9.

The example given above dynamically changes a cell after each cycle; in fact, the identity of multiple cells can be dynamically adjusted at the same time.

In the specific application, it is configurable to dynamically adjust a certain cell after each period or dynamically adjust all cells.

In order to embody an embodiment of the present invention from an interface between the entities, referring to FIG. 4, a flowchart of Embodiment 2 of the method for configuring a Cell ID includes:

S401: The RNC converts the fixed Cell ID allocated for the cell into a dynamic CelllD through a preset conversion function, and carries the signal in the wireless message;

S402: The RNC sends the wireless message including the dynamic Cell ID to the Node B, and the NodeB forwards the wireless message including the dynamic Cell1D to the UE. In the uplink direction:

S403: The UE forwards the measurement report including the dynamic cell ID to the RNC through the Node B.

S404: The RNC restores the dynamic Cell ID reported by the UE to a fixed Cell ID by using an inverse function of the conversion function; for example, the inverse function of Equation 1 is:

X _t {t) = f- ^l {Y _t ,t) Equation ₅

S405: The RNC still carries the fixed Cell ID in the message that interacts with the core network through the Iu interface. It should be noted that, in S305 or S402, the Node B may only forward the wireless message including the dynamic Cell ID, and does not process it. In the true signaling interaction between the Node B and the RNC, the Local CelllD (NodeB) is used. It is not known to configure the fixed CelllD). Person in the field It is understood that, for the Node B, the Local Cell ID is used as the identifier of each cell, and the RNC maintains the correspondence between the Local Cell ID and the Cell ID of each Node B.

Moreover, on the Iu interface between the RNC and the CN, the fixed Cell ID is still transmitted, which has no effect on the existing network system.

Therefore, in the embodiment of the present invention, except that the Uu interface transmits a dynamic Cell ID, the remaining interfaces, including the Iu interface and the Iub interface, are still fixed Cell IDs, have no impact on network transmission, and, besides RNC, The rest of the network entities do not need to change the processing of the Cell ID, and the implementation is very simple. Corresponding to the foregoing method, the embodiment of the present invention further provides an apparatus for configuring a Cell ID, which may be an RNC device itself, or a functional entity located inside the RNC, and may be implemented by software, hardware, or a combination of software and hardware. .

Referring to FIG. 5, it is a schematic structural diagram of Embodiment 1 of the apparatus, which includes a cell identifier pre-setting unit 501, a cell identity conversion unit 502, a wireless message assembling unit 503, and a wireless message sending unit 504, where

a cell identifier presetting unit 501, configured to set a fixed Cell lD of the cell;

The cell identifier conversion unit 502 is configured to convert the fixed Cell ID into a dynamic Cell ID, where the fixed Cell ID is mapped to the dynamic Cell ID. The wireless message assembling unit 503 is configured to carry the dynamic Cell ID. In the wireless message, the wireless message sending unit 504 is configured to send the wireless message that includes the dynamic Cell ID to the Node B, and instruct the Node B to send the wireless message to the UE. Wherein, preferably

The wireless message assembling unit 503 assembles the dynamic Cell lD into the Cell Identity field in the SIB3; or the wireless message assembling unit 503 assembles the dynamic Cell ID into the Cell Identity field in the SIB4.

Alternatively, the wireless message assembling unit 503 is configured to assemble the dynamic cell identifier into a cell identity signaling in a radio bearer setup message, a radio bearer reconfiguration message, or a radio bearer release message. The system messages SIB3, SIB4 are independent of the state of each UE, and are updated in the cell when the dynamic Cell ID changes.

The working process of the first embodiment of the apparatus is as follows: First, the cell identity conversion unit 502 is activated, and the fixed cell ID set by the cell identifier presetting unit 501 is converted into a dynamic cell ID;

Then, the dynamic Cell ID is carried in the wireless information by using the wireless message assembling unit 503; finally, the wireless message including the system information is sent to the Node B through the wireless message sending unit 504, and the Node B is instructed to use the wireless The message is sent to the UE. Referring to FIG. 6, the second embodiment of the device further includes:

The conversion function presetting unit 601 is configured to set a conversion function; the cell identifier conversion unit 502 converts the fixed cell identifier into a dynamic cell identifier by using the conversion function.

Further, the apparatus may further include: a measurement report receiving unit 602, configured to receive, from the Node B, a measurement report that is sent by the UE and includes the dynamic Cell ID;

The cell identifier recovery unit 603 is configured to restore the dynamic Cell ID included in the measurement report to a fixed Cell ID according to an inverse function of the conversion function.

Further, the apparatus may further include:

The Iu interface message unit 604 is configured to perform information interaction with the core network through the Iu interface, where the information of the interaction carries the fixed Cell ID. In the prior art, the third party may obtain the fixed cell ID in the UTRAN to send the wireless message to the UE, thereby determining the cell location information, and then providing the user in the cell with the illegal service. In the embodiment of the present invention, on the RNC side. The fixed Cell ID is translated, and the dynamic Cell ID is sent to the UE on the Uu interface. Even if the third party obtains the dynamic Cell ID, it is difficult to know the real location information of the cell (the location information of the cell is fixed. The Cell ID corresponds to, therefore, effectively solves the problem that third parties use the Cell ID to provide illegal services. Moreover, in the embodiment of the present invention, except that the Uu interface transmits a dynamic Cell ID, The remaining interfaces, including the Iu interface and the Iub interface, are still fixed Cell IDs, which have no effect on the network transmission, and the network entities other than the RNC do not need to change the processing of the Cell ID, and the implementation is very simple.

A person skilled in the art can understand that the process of implementing the method for configuring the Cell ID in the above embodiment can be completed by hardware related to the program instruction, and the program can be stored in a readable storage medium, and the program executes the above when executed. The corresponding step in the method. The storage medium may be, for example, a ROM/RAM, a magnetic disk, an optical disk, or the like.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

Rights request

A method for configuring a cell identifier, the method comprising:

Assign a fixed cell identity to the cell;

Converting the fixed cell identifier into a dynamic cell identifier, where the dynamic cell identifier has a mapping relationship with the fixed cell identifier;

The dynamic cell identifier is carried in the wireless message, and the wireless message including the dynamic 'J, the area identifier is sent to the user equipment through the wireless interface.

The method according to claim 1, wherein the converting the fixed cell identifier to the dynamic cell identifier is

The fixed cell identity is converted to a dynamic cell identity by a conversion function ( ) = / (X , ), where is the current time; ^ is the fixed cell identity of the cell; and is the dynamic cell identity of the cell i that changes over time.

3. The method of claim 1 wherein:

The wireless message refers to broadcast system information or wireless bearer information.

4. The method of claim 3, wherein

The system information is SIB3 or SIB4, and the radio bearer information is a radio bearer setup message, a radio bearer reconfiguration message, or a radio bearer release message.

5. The method of claim 4 wherein:

The dynamic cell identifier is carried in the wireless message, and the Cell Identity field in the SIB3 or the SIB4 is updated to the dynamic cell identifier, or the radio bearer setup message, the radio bearer reconfiguration message, or the radio bearer release message is used. The cell identity signaling is updated to a dynamic cell identity.

The method according to any one of claims 2 to 5, further comprising: receiving a measurement report that is sent by the user equipment and including the dynamic cell identifier, and using the dynamic cell identifier in the measurement report. The inverse function of the conversion function is restored to a fixed cell identity.

The method according to any one of claims 1 to 5, further comprising:

The fixed cell identifier is carried in a message that interacts with the core network through the Iu interface.

A device for configuring a cell identifier, comprising: a cell identifier presetting unit, configured to set a fixed cell identifier of the cell; and the method further includes:

a cell identifier conversion unit, configured to convert the fixed cell identifier into a dynamic cell identifier, where the dynamic cell identifier has a mapping relationship with the fixed cell identifier;

a wireless message assembling unit, configured to: send the dynamic cell identifier to the wireless information; the wireless message sending unit, configured to send the wireless message that includes the dynamic cell identifier to the base station, and instruct the base station to send the wireless message Give the user device.

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

And a conversion function presetting unit, configured to set a conversion function, wherein the cell identity conversion unit converts the fixed cell identifier into a dynamic cell identifier by using the conversion function.

10. The device according to claim 9, further comprising:

a measurement report receiving unit, configured to receive, from the base station, a measurement report that is sent by the user equipment and includes the dynamic cell identifier;

The cell identifier recovery unit is configured to restore the dynamic cell identifier included in the measurement report to a fixed cell identifier according to an inverse function of the conversion function.

11. The device according to claim 10, further comprising:

The Iu interface message unit is configured to exchange information with the core network through the Iu interface, where the information of the interaction carries the fixed cell identifier.

12. Apparatus according to any of claims 8-11, characterized in that

The wireless message assembling unit is a Cell that assembles the dynamic cell identifier into SIB3

Identity domain;

Or the wireless message assembling unit is configured to assemble the dynamic cell identifier into a Cell Identity field in the SIB4;

Alternatively, the wireless message assembling unit is configured to assemble the dynamic cell identifier into a cell identity signaling in a radio bearer setup message, a radio bearer reconfiguration message, or a radio bearer release message.