KR20110111234A - Mobility cell measurement method and apparatus for mobile communications system - Google Patents

Abstract

The present invention relates to a method and apparatus for measuring a mobile cell in a mobile communication system. The mobile cell measuring method includes performing synchronous transmission between carriers of a synchronization signal on at least two CCs; Transmitting CC information indicating a carrier of a serving cell and a CC capable of performing carrier aggregation (CA) among the at least two CCs to a user terminal through high-level signaling; And serving the federated mobility measurement information so that the user terminal determines a CC for performing federated mobility measurement according to the transmitted CC information and federated mobility measurement information and performs the federated mobility measurement in the determined CC. Transmitting to the user terminal of a cell. This invention can increase the speed of mobility measurement and reduce the power consumption of the user terminal.

Description

METHOD AND APPARATUS FOR MOBILE CELL MEASUREMENT IN MOBILE COMMUNICATION SYSTEM {MOBILITY CELL MEASUREMENT METHOD AND APPARATUS FOR MOBILE COMMUNICATIONS SYSTEM}

TECHNICAL FIELD The present invention relates to the field of mobile communication technology, and more particularly, to a method and apparatus for mobility cell measurement in a mobile communication system.

In Long Term Evolution (LTE) systems, various system bandwidths such as 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz may be supported. Regardless of system bandwidth, the primary synchronization signal (PSS) and secondary synchronization signal (SSS) used for mobility measurements are all six resource blocks in the center of the overall system bandwidth, approximately 1M. (Resource Block: RB) is transmitted using the bandwidth. Therefore, when a user equipment (UE) performs mobility measurement of radio resource management, each time the measurement is performed, the cell is identified only at the PSS and SSS of 6 RBs in the center of the system bandwidth regardless of the system bandwidth. This is done.

In particular, according to the minimum performance requirements of the performance requirements specifications of the radio resource management of the 3rd Generation Partnership Project (3GPP), the user terminal may reselect the idle mode or switch to the connected mode. In order to perform the measurement, a reference signal received power (RSRP) of only a cell specific reference signal (CRS) is measured at 6 RBs in the center.

During the mobility measurement of the user terminal, a base station (BS) notifies the user terminal of information of an adjacent cell through a broadcast message or radio resource control (RRC) signaling. In an available LTE system, the base station notifies the user terminal of carrier frequency information that the neighboring cell differs from the current cell, so that the user terminal measures the neighboring cell of different frequency in the mobility measurement. However, when the user terminal measures carriers of different frequencies one by one, the mobility measurement time of cells of different frequencies is the sum of the measurement times of carriers of all different frequencies. As the amount of carriers of different frequencies increases, the time delay of mobility measurement becomes larger and the power consumption of the user terminal becomes larger.

In Long Term Evolution Advance (LTE-A) systems, Carrier Aggregation (CA) technology, which achieves a larger operating bandwidth by integrating multiple Component Carriers (CCs) to support higher transmission rates Is proposed. For example, support for a bandwidth of 100 MHz can be obtained by integrating five CCs of 20 MHz.

Available LTE-A system mainly supports three CA frequency deployment policies as follows.

Frequency Operation Scenario 1: Base station antennas corresponding to CCs for CA are in the same location and have very similar coverage ranges.

Frequency Operation Scenario 2: Although base station antennas corresponding to CCs for a CA are in the same direction and in the same direction, the coverage range of the cell where one of the CCs is located is smaller than the coverage of the cell where the other CC is located.

Frequency Operation Scenario 3: The base station antennas corresponding to the CCs for the CA are in the same location, but towards different directions.

However, 3GPP currently cannot determine the mobility measurement method for LTE-A system. In LTE-A systems, user terminals need to measure carriers of more different frequencies due to the suggestion of CA technology. If still using the mobility measurement method in the LTE system, the user terminal will perform measurements one by one at six RBs in the center of the different frequency carriers, which will result in longer time and greater power consumption resulting from the mobility measurement. It is obvious.

The present invention provides a method and apparatus for measuring mobility in a mobile communication system such as LTE-A to improve the speed of mobility measurement and reduce power consumption of a user terminal.

According to one aspect of the present invention, in a mobile cell measurement method in a mobile communication system,

Performing inter-carrier synchronous transmission of a synchronization signal on at least two CCs;

Transmitting, from the at least two CCs, CC information indicating a carrier of a serving cell and a CC that can be carrier-aggregated to a user terminal through high-level signaling; And

The joint mobility measurement information is transmitted to the user terminal of the serving cell, so that the user terminal determines a CC for performing the federation mobility measurement according to the transmitted CC information and the federation mobility measurement information, and the joint mobility in the determined CC. Performing the measurement.

According to another aspect of the present invention, in a mobile cell measurement method in a mobile communication system,

Performing synchronous transmission between carriers of a synchronization signal on at least two CCs;

And transmitting the federated mobility measurement information to the user terminal of the serving cell so that the user terminal determines a CC for performing the federated mobility measurement according to the federated mobility measurement information and performs the federated mobility measurement at the determined CC.

As can be seen from the above-described technical problem solving means, in the present invention, the antennas corresponding to the synchronous transmission of the synchronization signal in at least two CCs having the same position and perform the carrier and CA of the serving cell By transmitting the information of the CC and the federation mobility measurement information to the user terminal, the user terminal determines the CC to perform the federation mobility measurement accordingly, the combined mobility measurement at the determined CC without measuring the carriers of different frequencies one by one The performance of the measurement is improved, the speed of mobility measurement is improved, and the power consumption of the user terminal is reduced.

1 is a flow diagram illustrating a method provided by an embodiment of the present invention;
2A and 2B are schematic diagrams respectively illustrating synchronous transmission of a synchronization signal in a frequency division duplex (FDD) system and a time division duplex (TDD) system;
3 is a schematic diagram illustrating a method of combining joint cell identification;
4A and 4B are schematic diagrams respectively illustrating a selective joint cell identification method corresponding to the same physical cell ID (PCI) and separate PCIs;
5 is a flow diagram illustrating another method provided by an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments in order to clarify the objects, technical solutions, and advantages of the present invention.

The method provided by an embodiment of the present invention may be as shown in FIG. 1 and includes the following main steps.

Step 101: performs synchronous transmission between carriers of a synchronization signal in at least two CCs.

In this step, the base station may perform synchronous transmission between carriers of the synchronization signal in CCs whose antennas have the same location. Otherwise, the transmission delay resulting from the positional difference of the antennas may transmit asynchronous arrival to the receiving end even if the synchronization signals are transmitted simultaneously. In this step, the synchronization signal includes a PSS and an SSS. Performing synchronous transmission of the synchronization signal means that an error between the transmission time sequences in which each CC transmits the PSS and the SSS is within a predetermined range. In other words, the PSS and the SSS may be completely identical or alternatively have approximately the same transmission time sequence. 2A and 2B show schematic diagrams illustrating that each CC performs synchronous transmission of a synchronization signal in an FDD system and a TDD system.

Synchronous transmission of PSS and SSS can ensure synchronous transmission of CRS in each CC.

In one embodiment of the invention, at least two CCs for performing synchronous transmission at separate antenna positions may have the same combination or alternatively separate combinations.

More preferably, the base station can transmit the same PCI in at least two CCs involved in this step. That is, the PSS and SSS transmitted in the CCs have the same sequence, and the CRS also has the same scrambling code sequence.

In step 102, a carrier of a serving cell and CC information that can be carrier-carried among at least two CCs are transmitted to a user terminal in the serving cell through high-level signaling.

Specifically, the CC corresponding to the antenna having the same position and capable of performing the carrier cell and the CA of the serving cell is actually CC information for performing synchronous transmission between the carrier cell and the carrier of the synchronization signal.

CC of the serving cell involved in this step may be a Primary Component Carrier (PCC) configured by the base station for the user terminal.

The high-level signaling sent by the base station of the serving cell may be a system broadcast or alternatively a dedicated RRC message for the user terminal.

In step 103, the federated mobility measurement information is transmitted to the user terminal of the serving cell so that the user terminal determines a CC for performing the federated mobility measurement according to the CC information and the federated mobility measurement information and performs the federated mobility measurement in the determined CC. .

The federated mobility measurement information involved in this step may be transmitted through a system broadcast of a cell or a dedicated RRC message for a user terminal. Specifically, if the transmission is performed in the system broadcast of the cell, the user terminal may perform the combined mobility measurement of the idle mode. If the transmission is performed in the RRC message, the user terminal may perform federated mobility measurement of the connected mode.

Federated mobility measurement by a user terminal means that a plurality of CCs perform federated cell identification detection or alternatively federated RSRP measurement.

In particular, the joint cell identification detection may be combining joint cell identification. That is, the user terminal combines and sums the signals received in the plurality of CCs, and then performs cell timing detection and cell ID detection on the combined signal. The combined association cell identification method is shown in FIG. 3.

In addition, selective federated cell identification is also possible. That is, the user terminal performs cell timing detection and cell ID detection on the signal received in each CC until cell identification is completed in any one CC. In the selective federated cell identification method, if the corresponding antenna has the same location and separate physical cell IDs (PCIs) are transmitted in the CC for performing the CA and the serving cell carrier, the user terminal completes identification of one cell among the CCs. After that, the cell timing of the CC is taken as the cell timing of another CC, and then cell ID detection of another carrier is performed.

The selective federated cell identification method in which the same PCI is transmitted in each CC is shown in FIG. 4A, and the selective federated cell identification method in which separate PCIs are transmitted in each CC is shown in FIG. 4B.

The federated RSRP measurement performed on multiple CCs may be averaging the RSRP value obtained by performing the measurement on multiple CCs to obtain an average RSRP for multiple CCs.

Specifically, in step 103, the federated mobility measurement information transmitted to the user terminal of the serving cell may include one or any combination of the following information.

First information: information for indicating whether the user terminal can perform combined mobility measurement. Therefore, if it is indicated that the user terminal can perform the federation mobility measurement, the user terminal performs the federation mobility measurement in the CC corresponding to the CC information transmitted in step 102.

Second information: information for indicating how the user terminal performs the combined mobility measurement. Specifically, the method of federated mobility measurement may be a combined federated cell identification method, an optional federated cell identification method, or a federated RSRP measurement method.

Third information: an indication of whether the PSS and the SSS correspond to the same PCI in the CC for performing the federated mobility measurement.

Fourth information: information for indicating a CA frequency operation scenario used by the CC for performing federated mobility measurement. The user terminal may determine a federation mobility measurement method (ie, a combined federated cell identification method, an optional federated cell identification method, or a combined RSRP measurement method) to be used according to whether to perform federated mobility measurement and a frequency operation scenario.

Fifth information: information for indicating whether the CC for performing federated mobility measurement is a continuous CC or a discontinuous CC. The user terminal may perform federated mobility measurement in the continuous CC.

Sixth information: information for indicating whether the CC for performing the joint mobility measurement is in the same frequency band. The user terminal may perform combined mobility measurement in the CC of the same frequency band.

Seventh information: information for indicating a CC necessary for the user terminal to perform the combined mobility measurement. The information of such CC may be part or all of the information of the CC transmitted in step 102, and may be more sufficient than the information of the CC transmitted in step 102. After obtaining the information of the CC required for the federated mobility measurement, the user terminal typically determines a CC capable of performing the federated mobility measurement, which may be part or all of the CC corresponding to the information of the CC transmitted in step 102, and then Perform joint mobility measurements on the CCs.

In this case, the indicating manner may include, in particular, the following manner. It is indicated that the CC for the user terminal to perform the federated mobility measurement is the same as the CC of the serving cell. Accordingly, the user terminal performs the federated mobility measurement in the CC of the serving cell. Alternatively, it is indicated that the CC used for the federated mobility measurement for the serving cell is a subset of the CC used for the federated mobility measurement for the neighboring cell, so that the user terminal is the CC used for the federated mobility measurement for the serving cell. Perform a joint mobility measurement at. Alternatively, the CC in the serving cell used for the joint mobility measurement of the neighbor cell is indicated, so that the user terminal performs the joint mobility measurement at the indicated CC.

In the following, some examples of combining the aforementioned combined mobility information will be given. For example, the second information and the seventh information are combined. That is, information for indicating how the user terminal performs the federated mobility measurement and information for indicating the CC required to perform the federated mobility measurement are merged. Therefore, after receiving the information, the user terminal determines the CC where the federated mobility measurement is located by using the information of the CC necessary to perform the federated mobility measurement, and measures the federated mobility in the manner of the federated mobility measurement indicated in the determined CC. Do this. Another combination of the information may be a combination of the fourth information and the seventh information. That is, it merges the information of the CC necessary to perform the combined mobility measurement and the information for indicating the CA frequency operation scenario of the CC. After receiving such a combination of information, the user terminal can determine the manner of federated mobility measurement that can be used according to the indicated CA scenario, and then perform federated mobility measurement at the CC capable of performing federated CC mobility measurement.

In addition, an embodiment of the present invention provides another implementation method in addition to the above-described method, which may be as shown in FIG. 5, and includes the following main steps.

In step 501, at least two CCs perform synchronous transmission between carriers of a synchronization signal.

In this step, the base station may perform synchronous transmission between carriers of the synchronization signal in CCs whose antennas have the same location. Otherwise, the transmission delay resulting from the positional difference of the antennas may transmit asynchronous arrival to the receiving end even if the synchronization signals are transmitted simultaneously. In this step, the synchronization signal includes a PSS and an SSS. Performing synchronous transmission of the synchronization signal means that an error between the transmission time sequences in which each CC transmits the PSS and the SSS is within a predetermined range. In other words, the PSS and the SSS may be completely identical or alternatively have approximately the same transmission time sequence. 2A and 2B show schematic diagrams illustrating that each CC performs synchronous transmission of a synchronization signal in an FDD system and a TDD system.

Synchronous transmission of PSS and SSS can ensure synchronous transmission of CRS in each CC.

More preferably, the base station can transmit the same PCI in at least two CCs involved in this step. That is, the PSS and SSS transmitted in the CCs have the same sequence, and the CRS also has the same scrambling code sequence.

In step 502, the federated mobility measurement information is transmitted to the user terminal of the serving cell so that the user terminal determines a CC for performing the federated mobility measurement according to the federated mobility measurement information and performs the federated mobility measurement in the determined CC.

The federated mobility measurement information involved in this step may be transmitted through a system broadcast of a cell or a dedicated RRC message for a user terminal. Specifically, if the transmission is performed in the system broadcast of the cell, the user terminal may perform the combined mobility measurement of the idle mode. If the transmission is performed in the RRC message, the user terminal may perform federated mobility measurement of the connected mode.

Federated mobility measurement by a user terminal means that a plurality of CCs perform federated cell identification detection or alternatively federated RSRP measurement.

Specifically, federated cell identification detection may be combined federated cell identification. That is, the user terminal combines and sums the signals received in the plurality of CCs, and then performs cell timing detection and cell ID detection on the combined signal. The combined association cell identification method is shown in FIG. 3.

In addition, selective federated cell identification is also possible. That is, the user terminal performs cell timing detection and cell ID detection on the signal received in each CC until cell identification is completed in any one CC. In the selective federated cell identification method, if the corresponding antennas have the same position and separate PCIs are transmitted in the CC for performing the CA and the serving cell, the user terminal completes the cell identification of one of the CCs, The cell timing is taken as the cell timing of another CC, followed by cell ID detection of another carrier.

The selective federated cell identification method in which the same PCI is transmitted in each CC is shown in FIG. 4A, and the selective federated cell identification method in which separate PCIs are transmitted in each CC is shown in FIG. 4B.

The federated RSRP measurement performed on multiple CCs may be averaging the RSRP value obtained by performing the measurement on multiple CCs to obtain an average RSRP for multiple CCs.

Specifically, in step 502, the federated mobility measurement information transmitted to the user terminal of the serving cell includes seventh information in the first method, that is, information for indicating a CC required for the user terminal to perform the federated mobility measurement. . Such information may be carrier information for indicating a CC for performing federated mobility measurement, such that the user terminal performs federated mobility measurement at the indicated CC.

In addition to the seventh information, one or any combination of the second to sixth information may be included.

Second information: information for indicating how the user terminal performs the combined mobility measurement. Specifically, the method of federated mobility measurement may be a combined federated cell identification method, an optional federated cell identification method, or a federated RSRP measurement method.

Third information: an indication of whether the PSS and the SSS correspond to the same PCI in the CC for performing the federated mobility measurement.

Fourth information: information for indicating a CA frequency operation scenario used by the CC for performing federated mobility measurement. The user terminal may determine a federation mobility measurement method (ie, a combined federated cell identification method, an optional federated cell identification method, or a combined RSRP measurement method) to be used according to whether to perform federated mobility measurement and a frequency operation scenario.

Fifth information: information for indicating whether the CC for performing the combined mobility measurement is a continuous CC or a discontinuous CC. The user terminal may perform federated mobility measurement in the continuous CC.

Sixth information: information for indicating whether the CC for performing the joint mobility measurement is in the same frequency band. The user terminal may perform combined mobility measurement in the CC of the same frequency band.

In the following, some examples of combining the aforementioned combined mobility information will be given. For example, the second information and the seventh information are combined. That is, information for indicating how the user terminal performs the federated mobility measurement and information for indicating the CC required to perform the federated mobility measurement are merged. Therefore, after receiving the information, the user terminal determines the CC where the federated mobility measurement is located by using the information of the CC necessary to perform the federated mobility measurement, and measures the federated mobility in the manner of the federated mobility measurement indicated in the determined CC. Do this. Another combination of the information may be a combination of the fourth information and the seventh information. That is, it merges the information of the CC necessary to perform the combined mobility measurement and the information for indicating the CA frequency operation scenario of the CC. After receiving such a combination of information, the user terminal can determine the manner of federated mobility measurement that can be used according to the indicated CA scenario, and then perform federated mobility measurement at the CC capable of performing federated CC mobility measurement.

In the following, three embodiments will be described to describe the method provided by the present invention.

Example 1:

CA uses frequency operation scenario 1. That is, in addition to CC k, there are (M-1) other CCs having the same coverage range, and the M CCs correspond to antennas having the same position and use the same PCI. The user terminal is located within coverage. Specifically, CC k is configured as a PCC of a user terminal. In other words, the cell determined from the PCC and the PCI is the serving cell of the user terminal.

Considered according to the method of an embodiment of the present invention is as follows.

A base station to which M CCs belong synchronously transmits PSS and SSS in the M CCs, and the PSS and SSS transmitted in the M CCs have a completely identical sequence.

The base station for the serving cell of the user terminal transmits information of (M-1) other CCs, that is, information of the CC capable of performing the PCC and CA to the user terminal (UE). Specifically, the base station may select N CCs from the (M-1) CCs according to channel conditions in each CC or service requirements of the user to perform the PCC and CA to transmit data to the user terminal. In particular, 0 ≦ N ≦ M-1.

The base station for the serving cell where the user terminal is located transmits the federated mobility measurement information to the user terminal through high-level signaling. The user terminal may determine the CC for performing the federated mobility measurement using the federated mobility measurement information and the information of the CC capable of performing the PCC and CA, and perform the federated mobility measurement in the determined CC.

The CC information may be transmitted through a system broadcast of a cell or a dedicated RRC message for a user terminal, and the federated mobility measurement information may also be transmitted through a system broadcast of a cell or a dedicated RRC message for a user terminal.

In this embodiment, the federated mobility measurement performed by the user terminal may be combined federated cell identification, selective federated cell identification, or federated RSRP measurement.

The associated mobility measurement information involved in this embodiment may be any one or any combination of the above seven classes of information. Details of the combined mobility measurement information are as follows.

The first information may be included directly indicating that the user terminal can perform the combined mobility measurement. After receiving the first information, the user terminal directly performs the association mobility measurement in the CC corresponding to the CC information transmitted in step 102.

Second information indicating that the user terminal uses the combined allied cell identification method may be included.

Third information indicating whether the PSS and the SSS in the CC corresponding to the CC information transmitted in step 102 correspond to the same PCI may be included.

Fourth information may be included. After receiving the fourth information, the user terminal determines that the current CA frequency operation scenario is frequency operation scenario 1, and determines that the method of combined mobility measurement that the user terminal can perform is combined federated cell identification.

Seventh information may be included. For example, the seventh information indicates which CCs of the M carriers can be used for the joint mobility measurement of the neighbor cell. Specifically, such an indication may be performed using bit mapping of the M bits. Alternatively, it is indicated that the CC for performing federated mobility measurement for the neighbor cell is the same as the CC for performing federated mobility measurement for the serving cell. Specifically, one bit may be used to perform such an indication. Alternatively, it is indicated that the CC for performing federated mobility measurement for the serving cell is a subset of the CC for performing federated mobility measurement for the adjacent cell. Specifically, one bit may be used to perform such an indication.

The fifth information or the sixth information may be included. After receiving the fifth or sixth information, the user terminal may determine whether to perform federated RSRP measurements on multiple carriers.

Example 2:

CA uses frequency operation scenario 2. That is, in addition to CC k, there are (M-1) other CCs. The M CCs correspond to antennas having the same location and the same direction and use the same PCI. However, the cell covered by the M CCs has separate coverage ranges. The user terminal is located within the coverage range of the cell of CC k. Specifically, CC k is configured as a PCC of a user terminal. In other words, the cell determined from the PCC and the PCI is the serving cell of the user terminal.

Considered according to the method of an embodiment of the present invention is as follows.

A base station to which M CCs belong synchronously transmits PSS and SSS in the M CCs, and the PSS and SSS transmitted in the M CCs have a completely identical sequence.

The base station for the serving cell of the user terminal transmits information of (M-1) other CCs, that is, information of the CC capable of performing the PCC and CA to the user terminal (UE). Specifically, the base station may select N CCs from the (M-1) CCs according to channel conditions in each CC or service requirements of the user to perform the PCC and CA to transmit data to the user terminal. In particular, 0 ≦ N ≦ M-1.

The base station for the serving cell where the user terminal is located transmits the federated mobility measurement information to the user terminal through high-level signaling. The user terminal may determine the CC for performing the federated mobility measurement using the federated mobility measurement information and the information of the CC capable of performing the PCC and CA, and perform the federated mobility measurement in the determined CC.

The information of the CC may be transmitted through a system broadcast or an RRC message of a cell, and the federated mobility measurement information may also be transmitted through a system broadcast or an RRC message of a cell.

In this embodiment, the federated mobility measurement performed by the user terminal may be an optional federated cell identification.

The associated mobility measurement information involved in this embodiment may be any one or any combination of the above seven classes of information. Specific contents included in the associated mobility measurement information are as follows.

Seventh information may be included. That is, CC information required for the user terminal to perform the federated mobility measurement is indicated, and then the user terminal may perform the federated mobility measurement in the CCs after receiving the information. For example, it may be indicated which CCs of the serving cell can be used for joint mobility measurement of multiple CCs of the neighbor cell. Specifically, it means which CCs of the M carriers can be used for the joint mobility measurement of the neighbor cell. Such an indication may be performed using a bit mapping of M bits. Alternatively, it is indicated that the CC for performing federated mobility measurement for the neighbor cell is the same as the CC for performing federated mobility measurement for the serving cell. Specifically, one bit may be used to perform such an indication. Alternatively, it is indicated that the CC for performing federated mobility measurement for the serving cell is a subset of the CC for performing federated mobility measurement for the adjacent cell. Specifically, one bit may be used to perform such an indication.

Third information may be included. That is, the third information indicates whether the PSS and the SSS in the CC corresponding to the information of the CC transmitted in step 102 correspond to the same PCI.

The fourth information indicates information of the current CA frequency operation scenario. After receiving this information, the user terminal determines that the current CA frequency operation scenario is frequency operation scenario 2, and determines that the federation mobility measurement method that the user terminal can perform is selective federated cell identification.

The second information indicates that the user terminal uses the selective federated cell identification method.

The first information directly indicates whether the user terminal can perform combined mobility measurement. Therefore, upon receiving an indication that the federation mobility measurement can be performed, the user terminal performs the federation mobility measurement on the CC corresponding to the information of the CC transmitted in step 102.

Fourth information or fifth information may be included. Here, the detailed description thereof will be omitted.

Example 3

CA uses frequency operation scenarios 1 or 2. That is, in addition to CC k, there are (M-1) other CCs. The CCs may have the same coverage range or separate coverage ranges. The M CCs correspond to antennas having the same location and the same direction, but use separate PCIs. The user terminal is located within coverage. Specifically, CC k is configured as a PCC of a user terminal.

Considered according to the method of an embodiment of the present invention is as follows.

A base station to which M CCs belong synchronously transmits PSS and SSS in the M CCs, and the PSS and SSS transmitted in the M CCs have a completely identical sequence.

The base station for the serving cell of the user terminal transmits information of (M-1) other CCs, that is, information of the CC capable of performing the PCC and CA to the user terminal (UE). Specifically, the base station may select N CCs from the (M-1) CCs according to channel conditions in each CC or service requirements of the user to perform the PCC and CA to transmit data to the user terminal. In particular, 0 ≦ N ≦ M-1.

The base station for the serving cell where the user terminal is located transmits the federated mobility measurement information to the user terminal through high-level signaling. The user terminal may determine the CC for performing the federated mobility measurement using the federated mobility measurement information and the information of the CC capable of performing the PCC and CA, and perform the federated mobility measurement in the determined CC.

The information of the CC may be transmitted through a system broadcast or an RRC message of a cell, and the federated mobility measurement information may also be transmitted through a system broadcast or an RRC message of a cell.

In this embodiment, the federated mobility measurement performed by the user terminal may be an optional federated cell identification.

The associated mobility measurement information involved in this embodiment may be any one or any combination of the following kinds of information.

Seventh information may be included. That is, the seventh information indicates the information of the CC necessary for the user terminal to perform the combined mobility measurement. The user terminal may perform federated mobility measurement on the determined CCs after receiving the information. For example, it may be indicated which CCs of the serving cell can be used for joint mobility measurement of multiple CCs of the neighbor cell. Such an indication may be performed using a bit mapping of M bits. Alternatively, it is indicated that the CC for performing federated mobility measurement for the neighbor cell is the same as the CC for performing federated mobility measurement for the serving cell. One bit can be used to perform such an indication. Alternatively, it is indicated that the CC for performing federated mobility measurement for the serving cell is a subset of the CC for performing federated mobility measurement for the adjacent cell. One bit can be used to perform such an indication.

Third information may be included. That is, the third information indicates whether the PSS and the SSS in the CC corresponding to the information of the CC transmitted in step 102 correspond to the same PCI. When the user terminal receives information for indicating that the PSS and the SSS transmitted from the plurality of CCs correspond to separate PCIs, the user terminal may use an optional allied cell identification method. That is, the user terminal performs cell timing detection and cell ID detection on a signal received in each CC until cell identification is completed in one CC, and then the cell timing of the CC in which cell identification is completed is changed to that of another CC. Taken as cell timing, and then cell ID detection of another carrier is performed.

As can be seen from the above technical solutions, in the method provided by the embodiments of the present invention, the antennas corresponding thereto perform synchronous transmission of a synchronous signal on at least two CCs having the same position and serve it. By transmitting the carrier information of the cell and the CC that can perform CA and the federated mobility measurement information to the user terminal, the user terminal accordingly determines the CC for performing the federated mobility measurement to measure the carriers of different frequencies one by one The combined mobility measurement can be performed in the determined CC without doing so, thereby improving the performance of the measurement, improving the speed of the mobility measurement, and reducing the power consumption of the user terminal.

The foregoing are merely preferred embodiments of the present invention, but are not limited to the scope of the present invention. It is intended that all changes, equivalents, and improvements made without departing from the spirit and principles of the invention are within the scope of the invention.

Claims (10)

In the mobile cell measurement method in a mobile communication system,
Performing synchronous transmission between carriers of a synchronization signal on at least two CCs;
Transmitting, from the at least two CCs, CC information indicating a carrier of a serving cell and a CC that can be carrier-aggregated to a user terminal through high-level signaling; And
In order for the user terminal to determine a CC for performing federated mobility measurement according to the transmitted CC information and federated mobility measurement information, and to perform the federated mobility measurement in the determined CC, the serving mobility measurement information is used in the serving cell. And transmitting to the user terminal of the mobility cell measurement method. The method of claim 1, wherein the carrier of the serving cell is a main component carrier (PCC) configured for the user terminal. 2. The method of claim 1, wherein the federated mobility measurement performed by the user terminal comprises combined federated cell identification, selective federated cell identification, or federated reference signal received power (RSRP) measurement. The method according to any one of claims 1 to 3, wherein the combined mobility measurement information,
Information for indicating whether the user terminal can perform the combined mobility measurement;
A manner in which the user terminal performs the federated mobility measurement, information for indicating a federated mobility measurement method including a combined federated cell identification method, an optional federated cell identification method, or a federated RSRP measurement method;
An indication of whether the synchronization signal corresponds to the same physical cell ID (PCI) in a CC for performing the combined mobility measurement;
Information for indicating a CA frequency operation scenario used by a CC for performing the combined mobility measurement;
Information for indicating whether a CC for performing the combined mobility measurement is a continuous CC or a discontinuous CC;
Information for indicating whether a CC for performing the combined mobility measurement is in the same frequency band; And
And one or any combination of information for indicating a CC necessary for the user terminal to perform the combined mobility measurement. The method of claim 4, wherein the information for indicating the CC required for the user terminal to perform the combined mobility measurement is:
An indication that a CC for performing the combined mobility measurement is the same as a CC of the serving cell,
An indication that the CC used for the joint mobility measurement for the serving cell is a subset of the CC used for the joint mobility measurement for the neighboring cell, or
And at least one of an indication of a CC to be used for the joint mobility measurement of the neighbor cell among the CCs of the serving cell. In the mobile cell measurement method in a mobile communication system,
Performing synchronous transmission between carriers of a synchronization signal on at least two CCs;
Transmitting the federated mobility measurement information to the user terminal so that the user terminal of the serving cell determines the CC for performing the federated mobility measurement according to the federated mobility measurement information and performs the federated mobility measurement at the determined CC. A mobile cell measurement method comprising a. 7. The method of claim 6, wherein the federated mobility measurement performed by the user terminal comprises a combined federated cell identification, an optional federated cell identification, or a combined reference signal received power (RSRP) measurement. The method according to claim 6 or 7, wherein the federation mobility measurement information includes information for indicating a CC required for the user terminal to perform the federation mobility measurement, or
Information necessary for the user terminal to perform the combined mobility measurement,
A manner in which the user terminal performs the federated mobility measurement, information for indicating a manner of the federated mobility measurement including a combined federated cell identification method, an optional federated cell identification method, or a combined RSRP measurement method;
An indication of whether the synchronization signal corresponds to the same physical cell ID (PCI) in a CC for performing the combined mobility measurement;
Information for indicating a CA frequency operation scenario used by a CC for performing the combined mobility measurement;
Information for indicating whether a CC for performing the combined mobility measurement is a continuous CC or a discontinuous CC; And
And one or any combination of information for indicating whether the CC for performing the joint mobility measurement is in the same frequency band. In the mobile cell measurement apparatus in a mobile communication system,
A controller for performing synchronous transmission between carriers of a synchronization signal on at least two CCs;
Among the at least two CCs, a carrier of a serving cell and CC information that can be carrier-integrated are transmitted to a user terminal through high-level signaling, and the user terminal is associated with the transmitted CC information and the joint mobility measurement information. And a transmitter for transmitting the federated mobility measurement information to the user terminal of the serving cell in order to determine a CC for performing mobility measurement and to perform the federated mobility measurement at the determined CC. Measuring device. In the mobile cell measurement apparatus in a mobile communication system,
A controller for performing synchronous transmission between carriers of a synchronization signal on at least two CCs;
A transmitter for transmitting the federated mobility measurement information to the user terminal so that the user terminal of the serving cell determines the CC for performing the federated mobility measurement according to the federated mobility measurement information and performs the federated mobility measurement at the determined CC; A mobile cell measuring apparatus comprising a.

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