KR20100052374A - Method for reporting information on neighboring cell - Google Patents

Abstract

PURPOSE: A method for reporting information about a neighboring cell is provided to express measurement information about EUTRAN(Evolved Universal Terrestrial Radio Access Network) cell in a measurement reporting message more accurately. CONSTITUTION: A network of each RAT(Radio Access Technology) includes pattern information of PCID(Physical Cell ID) to BCCH(Broadcast Control Channel) information message. The network transmits a BCCH information message to MS(Mobile Station)(S111). The network transmit neighboring cell information to the MS(S112). The MS generates a measurement repot message through the pattern information. The MS transmits the measurement report message to the network(S113).

Description

How to report neighbor cell information {METHOD FOR REPORTING INFORMATION ON NEIGHBORING CELL}

The present invention relates to a neighbor cell information reporting method.

Second generation mobile communication refers to digital transmission and reception of voice, such as CDMA and GSM. In addition to the GSM, GPRS has been proposed. The GPRS is a technology for providing a packet switched data service based on the GSM system.

Third generation mobile communication refers to the ability to transmit and receive images and data as well as voice, and the Third Generation Partnership Project (3GPP) developed the mobile communication system (IMT-2000) technology, and radio access technology (Radio Access). Technology, referred to as RAT). In this way, both IMT-2000 technology and radio access technology (RAT), for example, WCDMA, are collectively called UMTS (Universal Mobile Telecommunication System) in Europe. UTRAN stands for UMTS Terrestrial Radio Access Network.

Meanwhile, in the third generation mobile communication, data traffic is expected to increase rapidly in the future, and standardization work for making a long-band evolutionary network (LTE) with higher bandwidth is in progress.

In LTE, the term Evolved-UTRAN (E-UTRAN) is used, and in E-UTRAN, Orthogonal Frequency Division Multiple Access (OFDMA) is used as a radio access technology (RAT).

Meanwhile, as described above, various radio access technologies (RATs) exist, so that interoperability between the second generation GSM / GPRS and the third generation UMTS is problematic. In addition, even when a new radio access technology (RAT) such as E-UTRAN emerges, interoperability between RATs becomes a problem.

To solve this problem, operators provide roaming between RATs. This is because an operator can also recycle existing equipment. To this end, UEs may support multi-RAT. In addition, for this purpose, a network of each RAT provides information on a serving cell of a neighbor cell, and the terminal transmits its own measurement result (eg, measured power, SNR, etc.) of neighbor cells. Report to the network.

Hereinafter, a description will be given with reference to FIGS. 1 and 2.

1 is a flowchart illustrating a prior art, and FIG. 2 is an exemplary diagram illustrating a configuration of a measurement report message illustrated in FIG. 1.

As can be seen with reference to Figure 1, the base station 20 of each RAT transmits an information message, such as Neighboring Cell Information for the neighbor cell to the terminal 10 (S11).

At this time, when the base station 20, for example, the base station of the GSM EDGE Radio Access Network (GERAN) informs the terminal of information about neighboring cells, for example, neighboring E-UTRAN, there are two methods.

First, as a method called a white list, the base station 20 informs the frequency of the cell of the neighboring E-UTRAN and the index list for the physical cell ID (PCID).

Secondly, as a method called a black list, the base station 20 informs only the frequency list of cells of the neighboring E-UTRAN.

Then, the terminal 10 transmits the measurement report message for the neighbor cells to the base station 20 (S12).

In this case, when generating the measurement report message, the terminal 10 needs identifier information for distinguishing cells of the neighboring E-UTRAN, and the identifier information is similar to the above-described two types. Is implemented in a way.

First, as described above, as a method corresponding to the white list, cells of the neighboring E-UTRAN are divided into indexes for frequency and PCID.

Second, as described above, as a method corresponding to the black list, cells of the neighboring E-UTRAN are classified into a frequency and a PCID.

However, in the case of using the aforementioned white list, the base station 20 not only needs to manage information about cells of neighboring E-UTRAN or cells of GERAN according to cell planning, but also stores the PCID for each cell. Since it is necessary to inform the terminal 10, there is a problem that the amount of information transmitted downward.

On the other hand, when using the aforementioned Black List, the terminal 10 uses a total of 9 bits PCID, as shown in FIG.

The report message shown in FIG. 2 is composed of several segments. In this case, each segment is composed of 17 bits, and includes a 3-bit EUTRAN NCell MR field, a 3-bit PCID High field, a 5-bit “30-n” field, and a 6-bit PCID low field.

The EUTRAN NCell MR field includes measurement information for a neighboring EUTRAN cell, e.g., information on received power, the PCID High field includes a portion of the PCID, and the PCID low field contains the remainder of the PCID. do. The BCCH Freq NCell field includes frequency information of a broadcast control channel (BCCH) of a neighboring cell.

As such, when the black list is used, since 9 bits are required for PCID information among a total of 17 bits, measurement information for neighboring EUTRAN cells is limited to 3 bits.

In addition, since the measurement information for the neighboring EUTAN cell is represented by 3 bits, the resolution thereof is very low and thus there is a problem in that accurate information cannot be represented.

In addition, since the length of the segment cannot be reduced due to the 9-bit PCID, the number of segments that can be included in the measurement report message having a limited length is also limited.

In addition, the measurement report for the neighbor cells has been variously improved such as an enhanced measurement report, a packet measurement report, and a packet enhanced measurement report. In this case, the number of segments is limited due to the 9-bit PCID.

Accordingly, an object of the present invention is to make it possible to more accurately represent the measurement information for the EUTRAN cell included in the measurement report message.

Another object of the present invention is to increase the number of segments included in the measurement report message.

In order to achieve the above object, in the present invention, instead of reducing the length of the cell identifier information when using the aforementioned Black List, the length of the measurement information for the EUTRAN cell is further increased, so that the measurement information for the EUTRAN cell is increased. Make it more accurate.

In addition, the present invention increases the number of segments included in the measurement report message by reducing the length of cell identifier information when using the aforementioned Black List.

Specifically, in order to achieve the above object, the present invention provides a neighbor cell information reporting method. The neighbor cell information reporting method includes receiving pattern information on identification information of one or more neighboring cells from a serving cell; Generating reduced identification information for the one or more neighboring cells using the pattern information; And transmitting a measurement report message including the reduced identification information and a result of measurement of one or more neighboring cells to the serving cell.

On the other hand, in order to achieve the above object, the present invention provides a neighbor cell information receiving method. The method for receiving neighbor cell information includes generating pattern information on identification information of one or more neighboring cells and transmitting the pattern information to a mobile station; Receiving from the mobile station a measurement report message comprising reduced identification information for the one or more neighboring cells and a result of the measurement for the one or more neighboring cells; Using the pattern information and the reduced identification information, obtaining complete identification information for the one or more neighboring cells, and reading the measurement report message for the one or more neighboring cells.

On the other hand, in order to achieve the above object, the present invention also provides a mobile terminal. The mobile terminal includes a transceiver; Storage means; And a processor, wherein the processor receives pattern information on identification information of one or more neighboring cells from a serving cell through the transceiver; Generating reduced identification information for the one or more neighboring cells using the pattern information; And transmitting the measurement report message including the reduced identification information and the measurement result for the one or more neighboring cells to the serving cell through the transceiver.

The present invention reduces the length of cell identifier information when using the aforementioned Black List. Measurement information for the EUTRAN cell included in the measurement report message can be represented more accurately.

It is to be noted that the technical terms used herein are merely used to describe particular embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present specification should be interpreted as meanings generally understood by those skilled in the art unless they are specifically defined in this specification, and are overly inclusive. It should not be interpreted in the sense of or in the sense of being excessively reduced. In addition, when the technical terms used herein are incorrect technical terms that do not accurately express the spirit of the present invention, they should be replaced with technical terms that can be understood correctly by those skilled in the art. In addition, the general terms used in the present invention should be interpreted as defined in the dictionary or according to the context before and after, and should not be interpreted in an excessively reduced sense.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In this application, terms such as “consisting of” or “having” should not be construed as necessarily including all of the various components, or various steps described in the specification, some of which include some or some of the steps. It should be construed that it may not be, or may further include additional components or steps.

In addition, terms including ordinal numbers, such as first and second, as used herein may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or similar components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easily understanding the spirit of the present invention and should not be construed as limiting the spirit of the present invention by the accompanying drawings. The spirit of the present invention should be construed to extend to all changes, equivalents, and substitutes in addition to the accompanying drawings.

Before describing the embodiments with reference to the drawings, the concept of the present invention will be briefly described as follows.

The network 200 of each radio access technology (RAT) is previously configured with a physical cell ID (ie PCID: Physical Cell ID) of neighboring cells, for example, neighboring E-UTRAN cells, and pattern information of the PCID. And the pattern information is transmitted to the mobile station (hereinafter referred to as MS) 100. Then, when the mobile station (MS) 100 generates a measurement report message for the neighboring E-UTRAN cells, it does not include the full PCID of the neighboring E-UTRAN cells, but instead includes the abbreviated PCID. Let's do it.

Therefore, the length of the PCID field as shown in FIG. 2 can be shortened to 9 bits.

3 is an exemplary view showing a first embodiment of the present invention, Figure 4 is an exemplary view showing a second embodiment of the present invention.

As can be seen with reference to FIGS. 3 and 4, according to the first and second embodiments, the network 200 of each RAT, that is, a serving cell, is a physical cell ID of neighboring E-UTRAN cells, That is, the PCID: the physical cell ID and the pattern information of the PCID are stored in advance, and the pattern information is included in a broadcast control channel (BCCH) information message or a MEASUREMENT INFORMATION message. (S111, S211). In this case, the length of the pattern information may be variable. For example, when the PCID of the first neighboring cell is 1110 11100, the PCID of the second neighboring cell is 1110 11101, and the PCID of the third neighboring cell is 1110 11111, the pattern information may be 4 bits as 1110. Or, for example, when the PCID of the first neighboring cell is 1110 11100, the PCID of the second neighboring cell is 1110 11101, and the PCID of the third neighboring cell is 1111 11111, the pattern information is 111, which may be 3 bits. have.

Subsequently, the network 200 of each RAT, that is, the serving cell, transmits an information message, eg, Neighboring Cell Information, to the mobile station (MS) 100 for a neighboring cell (S112, S212). In this case, when the serving cell (or base station) of the network 200, for example, a GSM EDGE Radio Access Network (GERAN) informs the terminal of information about neighboring cells, for example, neighboring E-UTRAN cells, the aforementioned Black Assume that you tell a List.

Then, the mobile station (MS) 100 generates a measurement report message using the pattern information, in order to report information (eg, measured power, SNR, etc.) about the neighboring cell measured by the mobile station (MS), It transmits to the network 200 (or serving cell, base station) (S113, S213). For example, if the PCID of the neighboring cell is 1110 11111, the mobile station (MS) 100 checks whether the pattern information (for example, 1110) matches, and determines the PCID of the remaining portion except for the matching pattern, that is, the PCID of the neighboring cell. Abbreviated PCID is included in the measurement report message and transmitted. In this case, since the length of the pattern information is variable as described above, the length of the Abbreviated PCID may also be variable.

As described above, according to the first and second embodiments, the length of the PCID can be reduced by using the pattern information. Therefore, the measurement report message may include a measurement report for more cells.

5 is an exemplary diagram illustrating a configuration of a measurement report message illustrated in FIGS. 3 and 4.

As shown in FIG. 5 (a), the measurement report message according to the present invention includes an EUTRAN NCell MR field, a BCCH Freq NCell field, and an Abbreviated PCID field.

As described above, the Abbreviated PCID field includes only the remaining part of the full PCID except for the pattern part. In this case, since the pattern information is variable as described above, the Abbreviated PCID field may also be variable to 9-n bits. That is, when the pattern information is 4 bits as 1111, the Abbreviated PCID field may be 5 bits, and when the pattern information is 3 bits as 111, the Abbreviated PCID field may be 6 bits.

As described above, since the length of the PCID is reduced unlike in the prior art, the length of the EUTRAN Ncell MR field including the measurement information may be increased by 3 + n bits. Therefore, the resolution of the measurement information is increased, so that the measurement information can be represented more accurately.

Alternatively, as shown in FIG. 5 (b), when the length of the EUTRAN Ncell MR field does not extend to 3 + n bits, the n bits may be used for other purposes.

Alternatively, the length of the segment may be shorter than 17 bits without using the n bits for other purposes. In this case, the measurement report message may include more segments (ie, measurement report for more cells).

6 is an exemplary diagram showing an internal operation of the mobile station shown in FIGS. 3 and 4, and FIG. 7 is another exemplary diagram showing an internal operation of the mobile station shown in FIGS.

FIG. 6 shows an internal operation when the mobile station (MS) 100 is in a dedicated mode, and FIG. 7 illustrates an operation when the mobile station (MS) 100 is in an idle mode. It is shown.

Here, the dedicated mode means when the mobile station (MS) is connected to the network 200 (or serving cell or base station) and can transmit and receive data, and the idle mode (Idle state) Means when not connected.

First, referring to FIG. 6, the mobile station (MS) 100 is operating in a dedicated mode (S311), and a PCID pattern from the network 200 (a serving cell or a base station) through a dedicated channel. Receive and store (S312).

The mobile station (MS) 100 examines the measured PCID list of neighboring cells (S313), and determines whether the stored patterns match the PCIDs of the neighboring cells (S314).

If the PCIDs of the neighboring cells and the stored pattern match (for example, the pattern is 1110 and the PCIDs of the neighboring cells are 1110 00110, so the 1110 matches), the mobile station determines the neighboring cell that the pattern matches. Generate a measurement report message using an Abbreviated PCID, i.e., using a portion of the PCID except the pattern (e.g., 00110), and transmit the generated measurement report message to the network 200 (serving cell, or Base station) (S315).

On the other hand, as can be seen with reference to Figure 7, the mobile station (MS) 100 is operating in the idle mode (Idle Mode), and receives a PCID pattern from the network 200 through a broadcast channel or a common channel Save (S411).

Then, the mobile station (MS) 100 enters the dedicated mode (S412).

Next, the mobile station (MS) 100 examines the measured PCID list of neighboring cells (S413) and determines whether the PCIDs of the neighboring cells match the stored pattern (S414).

If the PCIDs of the neighboring cells and the stored pattern match (for example, the pattern is 1110 and the PCIDs of the neighboring cells are 1110 00110, where 1110 matches), the mobile station (MS) 100 determines the A measurement report message is generated by using an Abbreviated PCID, that is, a part of the PCID except the pattern (for example, 00110) for a neighboring cell that matches the pattern, and the generated measurement report message is transmitted to the network 200. In step S415).

The method according to the invention described thus far can be implemented in software, hardware, or a combination thereof. For example, the method according to the present invention may be stored in a storage medium (eg, mobile terminal internal memory, flash memory, hard disk, etc.) and may be stored in a processor (eg, mobile terminal internal microprocessor). It may be implemented as codes or instructions in a software program that can be executed by.

Hardware implementation of the mobile station 100 may be achieved through a transceiver (not shown), a storage means (not shown), and a controller (not shown). Specifically, as described above, the transceiver unit of the mobile station 100 receives pattern information through a broadcast control channel (BCCH) information message or a MEASUREMENT INFORMATION message. In addition, the transceiver unit receives the above-described information message, such as neighboring cell information for the neighboring cell, and transmits a measurement report message. The storage means of the terminal 100 stores pattern information. The controller of the terminal 100 generates a measurement report message by using the pattern information to report information (eg, measured power, SNR, etc.) of the measured neighbor cell, and transmits and receives the measurement report message. It transmits to the network 200 through the unit. In addition, operations of the transceiver, the storage means, and the controller will not be described in detail as will be readily understood by those skilled in the art with reference to FIGS. 3 to 7.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, May be modified, modified, or improved.

1 is a flow diagram illustrating the prior art.

2 is an exemplary diagram illustrating a configuration of a measurement report message shown in FIG. 1.

3 is an exemplary view showing a first embodiment of the present invention.

4 is an exemplary view showing a second embodiment of the present invention.

5 is an exemplary diagram illustrating a configuration of a measurement report message illustrated in FIGS. 3 and 4.

6 is an exemplary diagram showing an internal operation of the mobile station shown in FIGS. 3 and 4.

FIG. 7 is another exemplary diagram illustrating an internal operation of the mobile station shown in FIGS. 3 and 4.

Claims (15)

Receiving pattern information on identification information of one or more neighboring cells from a serving cell; Generating reduced identification information for the one or more neighboring cells using the pattern information; And transmitting a measurement report message including the reduced identification information and the measurement result of the at least one neighboring cell to the serving cell. The method of claim 1, The pattern information is neighbor cell information reporting method characterized in that the received via a Broadcast Control Channel (BCCH) information message or a MEASUREMENT INFORMATION message. The method of claim 1, And receiving an information message for a neighbor cell from the serving cell. The method of claim 1, The reduced identification information is generated using the complete identification information of the neighbor cell and the pattern information. The method of claim 1, And the reduced identification information is generated based on a different part between the complete identification information of the neighbor cell and the pattern information. The method of claim 1, And the measurement result for the neighboring cell includes at least one of power strength and SNR of a received signal from the neighboring cell. The method of claim 1, The measurement report message is a neighbor cell information reporting method, characterized in that the MEASUREMENT REPORT message. The method of claim 1, And the remaining portion of the report message by the reduced identification information is used by the measurement result. Generating pattern information on identification information of one or more neighboring cells and transmitting the pattern information to the mobile station; Receiving from the mobile station a measurement report message comprising reduced identification information for the one or more neighboring cells and a result of the measurement for the one or more neighboring cells; Acquiring complete identification information for the one or more neighboring cells by using the pattern information and the reduced identification information, and reading a measurement report message for the one or more neighboring cells. Neighbor cell information receiving method. 10. The method of claim 9, And the pattern information is transmitted through a broadcast control channel (BCCH) information message or a MEASUREMENT INFORMATION message. 10. The method of claim 9, And the measurement result for the neighboring cell includes at least one of power strength and SNR of a received signal from the neighboring cell. 10. The method of claim 9, And the measurement report message is a MEASUREMENT REPORT message. A transceiver; Storage means; And And a processor, the processor receiving pattern information on identification information of one or more neighboring cells from a serving cell through the transceiver; Generating reduced identification information for the one or more neighboring cells using the pattern information; And transmitting a measurement report message including the reduced identification information and a result of measurement of one or more neighboring cells to the serving cell through the transceiver. The method of claim 13, The pattern information is a mobile terminal, characterized in that it is received through a Broadcast Control Channel (BCCH) information message or a MEASUREMENT INFORMATION message. The method of claim 13, The reduced identification information is generated using the complete identification information of the neighbor cell and the pattern information.

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