KR20140004561A - Methods and apparatuses for transmitting and receiving interference information in mobile communication networks - Google Patents

Abstract

The present invention relates to a wireless communication system and a wireless communication terminal, more particularly, to a method and a device for transmitting and receiving data between base station and terminal. A method for transmitting interference information of a mobile communication network according to an embodiment of the present invention includes: a step that a terminal confirms in-device coexistence interference (IDC) and transmits a message including the interference situation information to a base station; a step of deciding whether a cell quality result is measurable or not as a result of cell quality measurement for a cell having the IDC; a step of reporting a cell quality result for a cell having the IDC after reporting the message having the interference situation information for the IDC. In the quality measurement of a cell having the IDC, the specific information displaying the measurability of a cell quality result in which IDC is not included must be included in at least one between the interference situation information and cell quality result report and transmitted. [Reference numerals] (AA) Terminal; (BB) Base station; (CC) IDC interference effect = 0; (DD,JJ) without IDC interference; (EE,II) IDC interference effect = 1; (FF,HH) with IDC interference; (S810,S870) Severe IDC interference (Possible to measure cell quality result having no IDC interference); (S830,S860,S890,GG) Reporting the cell quality measurement result; (S840) Severe IDC interference (Impossible to measure cell quality result having no IDC interference)

Description

Method and Apparatus for Transmitting and Receiving Interference Information in Mobile Communication Networks {Methods and Apparatuses for Transmitting and Receiving Interference Information in Mobile Communication Networks}

The present invention relates to a wireless communication system and a terminal, and a method and apparatus for transmitting and receiving data between a base station and a terminal. More specifically, the present invention relates to a method and apparatus for discriminating and transmitting and receiving interference information in a mobile communication network.

As communications systems evolved, consumers, such as businesses and individuals, used a wide variety of wireless terminals. In a mobile communication system such as the current 3GPP family Long Term Evolution (LTE) and LTE-A (LTE Advanced), a high-speed and large-capacity communication system capable of transmitting and receiving various data such as video and wireless data, , It is required to develop a technology capable of transmitting large-capacity data based on a wired communication network. It is possible to efficiently transmit data using a plurality of cells in a method for transmitting a large amount of data. On the other hand, the base station receives information on the interference situation of the signal from the terminal to adjust the parameters of the cell, carrier (carrier) used by the terminal to maintain the communication environment of the terminal. The terminal may transmit the interference information to the base station to solve the interference caused by using several wireless devices at the same time, in this case, there is a problem that the interference information does not need to be transmitted.

The present invention is to provide a more efficient transmission method and apparatus by preventing the transmission of interference information of the terminal in the transmission of interference information to the base station to solve the interference caused by the simultaneous use of multiple wireless devices by the terminal.

In a method for transmitting interference information in a mobile communication network according to an embodiment of the present invention, the terminal checks an in-device coexistence interference (IDC) interference problem and transmits a message including the interference situation information to the base station, the IDC interference Determining whether the cell quality measurement result of the cell having the problem does not include IDC interference is measurable, and the IDC interference problem is generated following the message containing the interference situation information on the IDC interference problem. And reporting the cell quality result value for the cell to the base station, wherein, in the quality measurement of the cell in which the IDC interference problem occurs, the specific quality indicating the cell quality result value including no IDC interference is indicated. Include information in at least one of the interference situation information message and the cell quality result report to transmit the information. And that is characterized.

According to another aspect of the present invention, there is provided a method for receiving interference information in a mobile communication network, the method including receiving a message including interference situation information from a terminal that identifies an in-device coexistence interference (IDC) interference problem, and the IDC interference problem. And reporting and reporting a cell quality result value according to the cell quality measurement for the generated cell, wherein the specific information indicating whether the cell quality result value including no IDC interference is measurable for the cell in which the IDC interference problem occurs. Is obtained from at least one of the interference situation information message and the cell quality result report.

An apparatus for transmitting interference information in a mobile communication network according to an embodiment of the present invention includes a receiver for receiving a message from a base station, an IDC (In-device coexistence interference) interference problem, and a controller for identifying a cell in which the interference problem has occurred. And a transmitter for transmitting a message including the interference situation information generated by the controller, wherein the controller measures a cell quality result value not including IDC interference for a cell in which the IDC interference problem occurs. Determine whether it is possible, and measure the cell quality of the cell having the IDC interference problem following the message with the interference situation information, and display specific information indicating this according to whether the cell quality result value including no IDC interference can be measured. Include in at least one of the interference situation information message and the cell quality result report; To control so as to be characterized.

An apparatus for receiving interference information in a mobile communication network according to another embodiment of the present invention receives a message including interference situation information from a transmitter for transmitting a message to the terminal and a terminal that identifies an in-device coexistence interference (IDC) interference problem. And a control unit for reporting a cell quality result value according to a cell quality measurement for a cell in which the IDC interference problem occurs, and a control unit for controlling the transmitter and the receiver. And specific information indicating whether the cell quality result value including no IDC interference can be measured is obtained from at least one of the interference situation information message and the cell quality result value report.

When the terminal transmits the interference information to the base station to solve the interference caused by the simultaneous use of several wireless devices, it is possible to prevent unnecessary transmission of the interference information by transmitting a message including IDC interference situation information.

FIG. 1 illustrates a situation in which mutual interference between wireless modules may occur because LTE, GPS, BT / WiFi, etc. operate within one terminal.
2 shows a procedure for solving an IDC interference problem.
3 and 4 show forbidden timer operations.
5 illustrates an IDC procedure.
6 illustrates an IDC interference resolution procedure.
7 shows an example (eg 1 bit) of IDC interference influence information.
8 is an operation procedure according to an embodiment of the present invention.
9 is a flowchart illustrating a method of transmitting a specific value when reporting a cell quality affected by IDC interference as an operation procedure according to another embodiment of the present invention.
10 is an operation procedure of a terminal according to an embodiment of the present invention.
11 is an operation procedure of a base station according to an embodiment of the present invention.
12 is a diagram illustrating a configuration of a base station according to an embodiment of the present invention.
13 is a diagram illustrating a configuration of a user terminal according to one embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data and the like. A wireless communication system includes a user equipment (UE) and a base station (BS, or eNB). In the present specification, a user terminal is a generic concept meaning a terminal in wireless communication. In addition, user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.

A base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS. It may be called other terms such as Base Transceiver System, Access Point, Relay Node.

That is, in the present specification, a base station or a cell is interpreted in a comprehensive sense to indicate some areas or functions covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, an eNB or a sector (site) in LTE, and the like. It is meant to cover various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node communication range.

Herein, the user terminal and the base station are used in a broad sense as the two transmitting and receiving subjects used to implement the technical or technical idea described in this specification, and are not limited by a specific term or word. The user terminal and the base station are used in a broad sense as two (uplink or downlink) transmitting and receiving subjects used to implement the technology or technical idea described in the present invention, and are not limited by a specific term or word. Here, the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal, the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.

There are no restrictions on multiple access schemes applied to wireless communication systems. Various multiple access schemes such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, OFDM- Can be used. An embodiment of the present invention can be applied to asynchronous wireless communication that evolves into LTE and LTE-advanced via GSM, WCDMA, and HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB. The present invention should not be construed as limited to or limited to a specific wireless communication field and should be construed as including all technical fields to which the idea of the present invention can be applied.

A TDD (Time Division Duplex) scheme in which uplink and downlink transmissions are transmitted using different time periods, or an FDD (Frequency Division Duplex) scheme in which they are transmitted using different frequencies can be used.

In systems such as LTE and LTE-A, the uplink and downlink are configured on the basis of one carrier or carrier pair to form a standard. The uplink and downlink transmit control information through a control channel such as a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel And a data channel such as a Physical Downlink Shared CHannel (PDSCH), a Physical Uplink Shared CHannel (PUSCH), and the like.

In the present specification, a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.

The wireless communication system to which the embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-point transmission / reception system in which two or more transmission / reception points cooperatively transmit signals. antenna transmission system, or a cooperative multi-cell communication system. A CoMP system may include at least two multipoint transmission / reception points and terminals.

The multi-point transmission / reception point includes a base station or a macro cell (hereinafter referred to as 'eNB'), and at least one mobile station having a high transmission power or a low transmission power in a macro cell area, Lt; / RTI >

Hereinafter, downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal, and uplink means a communication or communication path from a terminal to multiple transmission / reception points. In downlink, a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal. In the uplink, the transmitter may be a part of the terminal, and the receiver may be a part of multiple transmission / reception points.

Hereinafter, a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, and a PDSCH may be expressed in the form of transmitting and receiving a PUCCH, a PUSCH, a PDCCH, and a PDSCH.

The eNB performs downlink transmission to the terminals. The eNB includes a physical downlink shared channel (PDSCH) as a main physical channel for unicast transmission, downlink control information such as scheduling required for reception of a PDSCH, A physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission in a Physical Uplink Shared Channel (PUSCH). Hereinafter, the transmission / reception of a signal through each channel will be described in a form in which the corresponding channel is transmitted / received.

LTE  On the system Measurement

In a mobile communication system, mobility support of a terminal is essential. For mobility support, the UE continuously measures signal quality of a serving cell that is currently being serviced and signal quality of neighboring cells around the serving cell. The measured result is transmitted to the base station under a special condition, and the base station supports the mobility of the terminal by instructing the terminal to handover to a neighbor cell based on the measurement result reported by the terminal.

 The terminal determines the measurement target according to the measurement configuration set by the base station and reports the corresponding result. Upon receiving the message including the measurement configuration, the UE performs the measurement and reports the measurement result.

Measurement configuration contains the following parameters:

Measurement objects : what the terminal should measure. The measurement object set in the terminal position is one of an intra-frequency measurement object, an inter-frequency measurement object, or an inter-RAT measurement object, respectively. In the case of intra-frequency and inter-frequency measurement, the measurement object is one LTE carrier frequency.

-Reporting configuration : Setting when the UE should report the measurement result to the base station.

Measurement identities : IDs that link a particular measurement object with a specific reporting configuration.

-Quantity configurations : settings for filtering measurement quantity and measurement results

Measurement gaps : A time allocated for purely measurement by the terminal as no transmission / reception of the terminal's data. During this period, inter-frequency and inter-RAT measurements are performed.

IDC ( In - device coexistence Interference )

One terminal may be equipped with multiple transmitters and receivers for wireless communication such as LTE, WiFi, Bluetooth (BT), and GNSS. These wireless transceivers can be used simultaneously as needed, such as simultaneous use of LTE and WIFi for traffic distribution, VoLTE service using a BT wireless headset, and additional GNSS receiver operation to obtain accurate location information of the terminal.

 Multiple types of transceivers (modules) such as LTE, BT, WiFi, GNSS, etc. are placed in close proximity to one small terminal, so that the signal strength from one transmitter is the receiver of another module in the same terminal. Larger cases may occur.

FIG. 1 illustrates a situation in which mutual interference between wireless modules may occur because LTE, GPS, BT / WiFi, etc. operate within one terminal. The use of filter technology and sufficiently separated frequencies for each module prevents interference between the two transceivers. However, if multiple radio transceivers are operating at adjacent frequencies, current filter technology will not be able to eliminate the interference sufficiently.

Hereinafter, interference occurring between different transceivers in one terminal is referred to as IDC interference (In-device coexistence interference).

1 illustrates a mutual interference problem between wireless modules in a terminal.

The wireless communication modules may cause an IDC interference problem in the following cases.

-LTE TDD can operate in Band 40 (2300 ~ 2400MHz), WiFi, Bluetooth can operate in ISM Band (2400 ~ 2483.5MHz). In this case, the transmission of LTE may interfere with WiFi and Bluetooth, and the transmission of WiFi or Bluetooth may interfere with the reception of LTE.

-LTE FDD can transmit uplink in Band 7 (2500 ~ 2570MHz), WiFi, Bluetooth can operate in ISM Band (2400 ~ 2483.5MHz). In this case, the uplink transmission of LTE may interfere with reception of WiFi or Bluetooth.

-LTE FDD can transmit uplink in Band 13 (UL: 777 ~ 787MHz) or Band 14 (UL: 788 ~ 798MHz), and GPS radio can receive at 1575.42MHz. In this case, the uplink transmission of the LTE may interfere with the reception of the GPS. Or if LTE FDD transmits upstream at Band 7 (2500 ~ 2570MHz) and GPS radio receives at 2.5GHz, L5 (1164 ~ 1215Mhz) or S (2483.5 ~ 2500MHz), uplink transmission of LTE May interfere.

The first of several directions to solve the IDC interference problem is to change the frequency of the LTE communication module (Frequency Division Multiplexing (FDM)) when interference between the LTE communication module and wireless communication modules such as BT / WLAN / GNSS occurs. . The second method is time division multiplexing (TDM) between communication modules that coexist in a frequency band where interference occurs.

In order to solve the IDC interference problem, cooperation between the terminal and the base station is required. That is, a handover for changing an LTE frequency used to avoid IDC interference to another frequency, and scheduling of a base station for dividing a time resource between an LTE module and another communication module. However, because the IDC interference is a problem that occurs within a terminal, the base station is difficult to know, so when the terminal encounters an IDC problem that cannot be solved by the terminal, the terminal transmits IDC interference-related information to the base station, and the base station transmits the information to the terminal based on the received information. It is possible to give a solution (HO or scheduling) to solve the IDC problem.

2 shows a procedure for solving an IDC interference problem.

The terminal 201 has defined a new message S220 called IDC Indication to inform the base station 209 of the IDC problem S210, and includes the following information.

-Unusable frequency : Carrier frequencies under severe IDC interference. The carrier frequency considering the IDC interference problem is limited to a carrier frequency set as a measurement object in a measurement configuration previously received by a terminal from a base station.

-Desired sub - frame reservation bitmap patterns (for LTE + BT voice) or desired DRX cycle periodicity / length and active time (for other cases): DRX configuration information that the UE wants to set for IDC interference resolution or information to help the DRX configuration.

In the IDC solution S230, HO (handover) or DRX (discontinuous reception) may be set.

IDC Indication may be transmitted to mean that the IDC interference problem is eliminated even when the IDC interference problem is mitigated or terminated. In addition, Prohibit timer is used to prevent frequent transmission of IDC Indication. That is, the terminal starts the prohibit timer when the IDC Indication is transmitted, and does not transmit the IDC Indication again until the timer expires.

Prohibit timer action

-Start: Start Inhibit Timer when sending IDC Indication.

Stop : Stops the prohibit timer when a solution is received from the base station for IDC interference resolution. The solution includes handover, changing DRX settings, and the like.

Upon expiration : When the prohibit timer expires, the terminal transmits an IDC Indication and restarts the timer.

After transmitting the IDC Indication, the terminal operates the prohibit timer according to the set value. The value of the timer may be set by the base station or may be a value predefined in the specification. While the inhibit timer is in operation, the UE does not transmit IDC Indication again.

3 and 4 show forbidden timer operations. 3 illustrates an example of a prohibit timer operating procedure, and FIG. 4 illustrates another example of a prohibit timer operating procedure.

In FIG. 3, if the terminal 301 finds an IDC interference problem (S310), the UE starts a timer and transmits an IDC Indication to the base station 309 (S320). At this time, the interference frequency information may be transmitted together. The base station 309 may transmit a message instructing handover or DRX resetting to the terminal 301 (S330). In this case, the timer is stopped. Thereafter, IDC Indication is not sent until the prohibit timer expires.

In FIG. 4, if the UE 401 finds an IDC interference problem (S410), a timer is started and an IDC Indication is transmitted to the base station 409 (S420). At this time, the interference frequency information may be transmitted together. After the prohibit timer expires, IDC Indication is not sent even if IDC interference problem is found. Thereafter, when the timer expires, the terminal 401 restarts the timer, and if it finds an IDC interference problem (S430), transmits an IDC Indication to the base station 409 (S440).

When the IDC interference problem occurs, the overall operating procedure of the terminal is shown in FIG.

5 illustrates an IDC procedure.

1. The UE checks an IDC interference problem for a carrier set as a measurement object (S510), and if a serious IDC interference problem is found that the UE cannot solve (S520), it transmits an IDC Indication to the base station to present IDC interference. Notify that there is a problem (S530). The IDC Indication may include information such as frequency, DRX cycle, length, etc., in which IDC interference has occurred.

2. Upon receiving the IDC Indication, the base station may change the DRX configuration based on the received DRX configuration information or the like for handover of the terminal to another frequency to solve the IDC interference problem of the terminal according to the above information.

3. The terminal transmits an IDC Indication and then starts a prohibit timer (S540). The timer starts or restarts every time IDC Indication is sent.

4. When the prohibit timer expires (S550), the terminal checks again that the IDC interference IDC interference situation has disappeared.

5. If the IDC interference situation is terminated, the terminal transmits an IDC Indication that the termination to the base station.

6. If there is still an IDC interference situation, the process is performed again from S520.

The procedure for solving IDC interference can be largely divided into three steps as shown in FIG. 6.

6 illustrates an IDC interference resolution procedure.

Step 1 : the terminal attempting to solve the IDC interference problem on its own in a period from when the use of another wireless module in the terminal is detected (S610) until the interference is severe and before the IDC indication is transmitted to the base station;

Step 2 : transmitting the IDC Indication (S620) and transmitting the IDC Indication because the IDC interference is severe and the terminal cannot solve it by itself until a period before receiving a solution from the base station;

Step 3 : After receiving a solution such as a handover or a DRX configuration change for IDC interference resolution from the base station (S630).

IDC interference generated by other radio modules in the terminal affects the quality values of the cells of the frequency affected by the IDC interference when measuring the quality of the cells according to the measurement configuration of the terminal. However, the base station can not distinguish whether or not the quality measurement is affected by IDC interference.

In step 1 of the IDC interference resolution procedure, the UE attempts to resolve itself. The UE does not need to consider whether the corresponding cell quality measurement is affected by the IDC interference. You can report anything without worrying about whether IDC interference was reflected. In contrast, in steps 2 and 3, after the UE transmits IDC Indication to the base station, when the UE measures and reports the cells to the base station, it should select and report only the cell quality result value without the influence of IDC interference. Because the UE reports the serious IDC interference through IDC Indication, the base station can determine the handover of the UE based on the cell quality measurement report results in the future, when using the cell quality measurement affected by the IDC interference, the wrong target This is because a handover or a ping-pong problem may occur. Therefore, after transmitting the IDC Indication, if there is a cell quality measurement value affected by the IDC interference, the value is not reported and is discarded.

In other words, in steps 2 and 3 of the IDC interference resolution procedure, when the UE reports the cell quality measurement according to the measurement configuration, it should report only the measurement result value without the influence of the IDC interference. If there is a small number of cell quality measurement results that are not affected by IDC interference due to severe IDC interference, it is impossible to report the result value if an incorrect value is reported in the measurement report step or there is no unaffected result.

In the present invention, when the terminal transmits an IDC Indication in the IDC interference resolution procedure in the terminal, in step 2 and step 3, if there is little or no cell measurement result unaffected by the IDC interference, the terminal is the base station In order to solve the problem that an incorrect value is transmitted or a measurement report operation is impossible, the terminal transmits IDC interference impact information on the cell quality measurement result to IDC Indication. The IDC interference impact information is information on whether or not cell quality measurement results of unusable frequencies reported by the UE to the base station after IDC Indication transmission include a value including the influence of IDC interference.

That is, if a cell measurement result value that is not affected by IDC interference does not exist and is set to be in IDC interference effect information of IDC Indication and transmitted, then the cell quality result values transmitted thereafter are the IDC interference effect result values. The base station can know if it is aware.

The IDC Indication may be transmitted whenever IDC interference impact information is changed. That is, when the IDC interference environment is changed and whether the cell measurement result value includes IDC interference, the UE may continue to report the cell quality measurement after transmitting the IDC Indication including the changed IDC interference impact information.

The IDC Indication message may be configured as follows.

-Unusable frequency : Carrier frequencies under severe IDC interference. The carrier frequency considering the IDC interference problem is limited to a carrier frequency set as a measurement object in a measurement configuration previously received by a terminal from a base station.

-Desired sub - frame reservation bitmap patterns (for LTE + BT voice) or desired DRX cycle periodicity / length and active time (for other cases): DRX configuration information that the UE wants to set for IDC interference resolution or information to help DRX configuration

-IDC interference impact information : Information on whether IDC interference is included in cell quality measurement results for each unusable frequency

FIG. 7 illustrates IDC interference impact information as one bit, for example, as one example of IDC interference impact information.

When measuring the cell quality of the frequency undergoing IDC interference, if the IDC interference is severe or the IDC interference pattern overlaps with the cell quality measurement time point, and there is no cell quality measurement result unaffected by the IDC interference, the UE is in IDC Indication. IDC interference impact information of the corresponding frequency may be set to 1 (example of applying the value of FIG. 7) and transmitted. Cell quality measurement results of the corresponding frequency reported after the IDC Indication transmission are the result of IDC interference. If it is possible to measure the cell quality unaffected by the IDC interference, the UE transmits by setting the IDC interference impact information of the corresponding frequency to 0 (example of applying the value of FIG. 7) to the IDC Indication. Cell quality measurement results of the corresponding frequency reported after the IDC Indication transmission are the result of being not affected by IDC interference.

8 is a procedure according to an embodiment of the present invention.

1. If a severe IDC interference occurs (S810), the terminal transmits an IDC Indication to the base station (S820). When the UE can measure the cell quality by avoiding IDC interference when measuring the quality of a cell subjected to IDC interference, the terminal sets 0 (= no interference) to IDC interference impact information in the IDC Indication and transmits it to the base station.

2. The cell quality reporting operation is performed according to the reporting configuration of the measurement configuration (S830). The resulting value is limited to the value measured avoiding IDC interference. Cell quality measurements with IDC interference are discarded.

3. If IDC interference is more severe, or when the cell quality measurement is overlapped with the IDC usage pattern, when IDC interference is avoided when measuring the quality of a cell subjected to IDC interference (S840), IDC interference in IDC Indication is not possible. 1 (= interference included) is set in the impact information and transmitted to the base station (S850).

4. When performing the cell quality reporting operation according to the reporting configuration of the measurement configuration, the cell quality result value defines only the result including IDC interference. Cell quality measurements that do not include IDC interference are discarded. If the IDC interference situation is changed and there are enough samples to report the cell quality measurement value that does not include IDC interference (S870), the IDC Indication which is set to 0 in the IDC interference impact information is transmitted to the base station (S880). ) And the reporting of the result values is started (S890).

Example )

The IDC Indication message may be configured as follows.

-Unusable frequency : Carrier frequencies under severe IDC interference. The carrier frequency considering the IDC interference problem is limited to a carrier frequency set as a measurement object in a measurement configuration previously received by a terminal from a base station.

-Desired sub - frame reservation bitmap patterns (for LTE + BT voice) or desired DRX cycle periodicity / length and active time (for other cases): DRX configuration information that the UE wants to set for IDC interference resolution or information to help the DRX configuration.

IDC interference influence information : IDC interference information of the cell quality measurement result for each unusable frequency.

- priority information (Priority) (LTE or BT, WLAN, GPS): LTE or priority information of the other wireless modules.

When the result of measuring the cell quality of the frequency undergoing IDC interference is low or does not exist due to severe IDC interference, the UE sets IDC interference impact information of the corresponding frequency to 1 in IDC Indication (see FIG. 7). Value can be applied). Cell quality measurement results of the corresponding frequency reported after the IDC Indication transmission are results including IDC interference. If it is possible to measure the cell quality unaffected by the IDC interference, the UE transmits by setting the IDC interference impact information of the corresponding frequency to 0 in IDC Indication. Cell quality measurement results of the corresponding frequency reported after the IDC Indication transmission are the result of not including IDC interference.

The base station may set a handover or a DRX configuration change of the terminal based on the cell quality result values measured before and after the message based on the IDC Indication information.

When making this determination, priority information, which is a preference of the terminal, may be used. The base station looks at the priority of the IDC Indication sent by the terminal, and then, depending on whether the terminal is interested in the quality of LTE, BT, WiFi, GPS, etc. Can be applied. The priority information is a value directly set by the user. Alternatively, a preset priority may be used according to the use of another wireless module. For example, priority may be set in advance in the terminal in the manner of LTE> Bluetooth headset> GPS.

Priority information (Priority) may indicate whether the priority of the LTE, for example through 1 bit. For example, when giving priority to LTE, as shown in Table 1 below, priority bit included in IDC Indication may be set to 0, and priority bit may be set to 1 if priority is not given to LTE.

Priority bit  (One bit ) LTE Precedence of 0 LTE priority One LTE non-priority

The base station receiving the IDC Indication including the priority information from the terminal, if the Priority bit information is 0, the base station IDC solution (eg handover, transmission and reception related) in a direction to maximize the quality of the LTE communication of the terminal Scheduling, etc.) can be applied. Or, if the priority bit information of the received IDC Indication is 1, the IDC solution (eg handover, transmission / reception related scheduling, etc.) in a direction of minimizing interference to the communication of another wireless module of the terminal even if the LTE communication of the terminal is damaged. Can be applied. Alternatively, the priority information of IDC Indication may be further divided according to the type of LTE traffic. For example, as shown in Table 2 below, priority can be set by dividing LTE voice and LTE data.

Priority bit  (2 bits ) LTE Precedence of 00 LTE priority 01 LTE voice priority 10 LTE control signal priority 11 LTE non-priority

The base station receiving the IDC Indication including priority information from the terminal, if the priority bit information is 00, the IDC solution (eg handover, transmission / reception scheduling, etc.) in a direction of maximizing the quality of LTE communication of the terminal. ) Can be applied. Alternatively, when the received priority bit information of the IDC Indication is 01, while minimizing damage to the LTE voice communication of the terminal, the remaining data transmission except the LTE voice takes some damage within an IDC solution (eg handover, Transmission and reception related scheduling) can be applied. Alternatively, when the received priority bit information of IDC Indication is 10, the IDC solution (eg handover) is minimized while the LTE data transmission takes some damage while minimizing damage to the LTE control signal transmission. Transmission / reception scheduling). Or, if the priority bit information of the received IDC Indication is 11, even if the LTE communication of the terminal loses, the IDC solution (eg handover, scheduling, etc.) is applied to minimize the interference to the communication of other wireless modules of the terminal. You can.

Alternatively, priority may be set for each wireless module. For example, as shown in Table 3 below, 00 may mean LTE priority, 01 means Bluetooth priority, 10 means WiFi priority, and 11 means GPS priority.

Priority bit  (2 bits ) LTE Precedence of 00 LTE priority 01 Bluetooth priority 10 WiFi first 11 GPS priority

The base station receiving the IDC Indication including priority information from the terminal, if the priority bit information is 00, the IDC solution (eg handover, transmission / reception related scheduling, etc.) in a direction of maximizing the quality of LTE communication of the terminal. ) Can be applied. Alternatively, when the priority bit information is 01, an IDC solution (e.g. handover, transmission / reception related scheduling, etc.) may be applied to minimize the influence on the quality of Bluetooth communication of the terminal. Alternatively, when the priority bit information is 10, an IDC solution (e.g. handover, transmission / reception related scheduling, etc.) may be applied to minimize the influence on the quality of the WiFi communication of the terminal. Alternatively, when the priority bit information is 11, an IDC solution (e.g. handover, transmission / reception related scheduling, etc.) may be applied to minimize the influence on the GPS reception quality of the terminal.

IDC  Reporting cell quality, including interference To a specific value  How to transfer

When there is no result value that is not affected by IDC interference when reporting a cell quality measurement after IDC Indication transmission, the UE may report the cell quality value to a base station by setting the corresponding cell quality value to a specific value. When the base station receives a specific value for the cell quality value of the unusable frequency, the base station assumes that the value is a cell quality value subjected to IDC interference.

9 is a flowchart illustrating a method of transmitting a specific value when reporting a cell quality affected by IDC interference by an operation procedure according to another embodiment of the present invention.

1. If severe IDC interference occurs (S910), the terminal transmits an IDC Indication to the base station (S920).

2. The cell quality reporting operation is performed according to the reporting configuration of the measurement configuration (S930).

3. If there is a cell quality result value that does not include IDC interference, the terminal sets the result value and reports it to the base station (S940, S950).

4. If only the cell quality result value including IDC interference exists, the UE sets a specific value (0 or 97) when reporting the quality of the corresponding cell and reports it to the base station (S960, S970).

 If the cell quality is reported as a specific value for a cell subjected to IDC interference indicated by IDC Indication, the base station considers that the result is affected by IDC interference.

After the terminal with severe IDC interference sends IDC Indication to the base station, the cell quality measurement report operation is performed according to the measurement configuration. The reliability of the measurement report results is very important because the base stations give basic handover commands to the terminal. Do. Therefore, the base station must be able to distinguish whether the corresponding measurement results include the influence of the IDC interference, so that the correct handover command can be issued.

However, at present, the UE always transmits only the result value not affected by the IDC interference in the measurement report operation after sending the IDC Indication to the base station. It can happen that it is impossible to measure cell quality avoiding IDC interference. In this case, the terminal reports an incorrect value to the base station or reports a result value when there is no unaffected result.

 Accordingly, in the present invention, the terminal informs the base station whether the cell quality measurement result has an influence of the IDC interference, the base station can be reliable in the cell quality report of the terminal, based on the received IDC interference information and the cell quality report The UE can give an accurate handover command to the UE so that the UE can handover to the most suitable cell.

10 is a view showing an operation procedure of a terminal according to an embodiment of the present invention. 8 and 9 include the embodiments described above.

The UE checks an IDC interference problem (S1010). As a result of the check, it is determined whether the interference situation information needs to be transmitted to the base station (S1020), and if it is not necessary to transmit, the interference situation is continuously checked. If it is necessary to transmit, it is determined whether the cell quality measurement result for the cell having the IDC interference problem is measurable whether the cell quality result value including no IDC interference is measurable (S1030).

If the cell quality result value that does not include IDC interference is not measurable, an IDC Indication message is sent (S1040) regarding the IDC interference problem, and the cell quality of the cell in which the IDC interference problem occurs is determined. Measure and report the cell quality result value to the base station (S1050).

At this time, in step S1040, specific information, for example, IDC interference impact information, may be set to a specific value, for example, 1 (including interference: a cell quality result value including IDC interference) to the message including the interference situation information. have. That is, in reporting the cell quality result value, only the cell quality result value including IDC interference corresponding to the specific information is included and the result values discarded.

Alternatively, the specific information may be included in the cell quality result value transmitted after the interference situation information message instead of including the specific information in the interference situation information including message. In this case, the specific information may be displayed by setting a quality result value of a cell whose cell quality result value including no IDC interference cannot be measured as a specific value.

If the cell quality result value including no IDC interference is measurable, an IDC Indication message containing the IDC interference problem is transmitted (S1060), and the cell quality of the cell in which the IDC interference problem occurs is measured. The cell quality result is reported to the base station (S1070).

At this time, in step S1040, specific information, for example, IDC interference impact information, may be set to a specific value, for example, 0 (not including interference: a result value not including IDC interference) and sent to the interference situation information containing message. . In this case, the specific information includes only the cell quality result value without IDC interference corresponding to the specific information in the cell quality result report (S1070) after the interference situation information message (S1060), and discards the result values that are not. do.

After the cell quality result value is reported according to the cell quality measurement, the UE performs another cell quality measurement and accordingly determines whether or not cell quality result value measurement without IDC interference is possible (S1080). The quality result report may be repeatedly performed according to step S1050 or step S1070.

11 is a diagram illustrating an operation procedure of a base station according to another embodiment of the present invention. 8 and 9 include the embodiments described above.

The base station waits to receive a message from the terminal (S1110). In the waiting process, a message (IDC Indication) including interference situation information is received from the terminal (S1120).

The base station determines whether a message (IDC Indication) including the interference situation information received from the terminal includes specific information, for example, IDC interference impact information (S1130).

If the message including the interference situation information includes IDC interference impact information, the base station receives a cell quality result value according to the cell quality measurement for the cell in which the IDC interference problem occurs (S1140), and thus receives the received cell quality result value. Is determined to be a cell quality result value with or without IDC interference (S1170). Cell quality result value sent when specific information, e.g., IDC interference impact information, is set to a specific value, for example, 0 (without interference: result without IDC interference) in the message containing the interference situation information. May be determined to be a result value that does not include IDC interference. Or when the IDC interference impact information is set to 1 (including interference: a result value including IDC interference) in the message including the interference situation information, the cell quality result sent is a result value including IDC interference. It can be judged that.

On the contrary, when the specific information is not included in the message including the interference situation information, specific information indicating whether the cell quality result value including no IDC interference is measurable is obtained from the cell quality result value report. It may be determined whether the quality result value includes IDC interference (S1160).

For example, when the cell quality result value is set to a specific value (0 or 97), the base station may operate by determining that the cell quality result value is a cell quality result value including IDC interference (S1170). Alternatively, when the cell quality result value is set to a corresponding result value rather than the specific value, the cell quality result value may be determined to be a cell quality result value not including IDC interference (S1180).

12 is a diagram illustrating a configuration of a base station according to an embodiment of the present invention.

Referring to FIG. 12, the base station 1200 includes a controller 1210, a transmitter 1220, and a receiver 1230.

The control unit 1210 controls the overall operation of the base station according to the operation of discriminating and reporting interference IDC in the terminal necessary to perform the above-described present invention.

The transmitter 1220 and the receiver 1230 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.

In more detail, the transmitter 1220 transmits a message to the terminal, and the receiver 1230 receives a message including the interference situation information from the terminal confirming the in-device coexistence interference interference problem. The cell quality result is reported according to the cell quality measurement for the generated cell. The controller 1310 controls the transmitter and the receiver. As described above with reference to FIGS. 8 to 11, the control unit 1310 may provide specific information indicating whether the cell quality result value including no IDC interference may be measured with respect to a cell in which the IDC interference problem occurs. Obtain from at least one of a status information message and the cell quality result report.

Meanwhile, when the specific information is included in the interference situation information message, the specific information does not include cell quality result value or IDC interference including IDC interference for the cell quality result value reported after the interference situation information message. Displays any result.

The cell quality result value reported after the interference situation information message includes only one of a cell quality result value including IDC interference corresponding to the specific information or a result value not including IDC interference.

On the other hand, when the specific information is included in the cell quality result report, the specific information is displayed by setting the cell quality result value to a specific value to indicate that the cell quality result value including no IDC interference cannot be measured. do.

13 is a diagram illustrating a configuration of a user terminal according to an embodiment of the present invention.

Referring to FIG. 13, the user terminal 1300 includes a receiver 1310, a controller 1320, and a transmitter 1330.

The receiver 1310 receives downlink control information, data, and a message from a base station through a corresponding channel.

In addition, the controller 1320 controls the overall operation of the base station according to the operation of distinguishing and reporting the interference (IDC) in the terminal required to perform the present invention described above.

The transmitter 1330 transmits downlink control information, data, and a message to a base station through a corresponding channel.

In more detail, the receiver 1310 receives a message from the base station, the controller 1320 identifies an IDC (In-device coexistence interference) interference problem, and identifies a cell in which the interference problem occurs. The transmitter 1330 transmits a message including the interference situation information generated by the controller.

The controller 1320 determines whether the cell quality measurement result for the cell having the IDC interference problem is measurable whether or not the cell quality result value including no IDC interference is measurable. Cell quality is measured and the specific information indicating the cell quality result value not including IDC interference is included in at least one of the interference situation information message and the cell quality result value report. .

In addition, when the control unit 1320 includes the specific information in the interference situation information message, the specific information includes a cell quality result value or IDC including IDC interference with respect to the cell quality result value reported after the interference situation information message. One of the result values without the interference may be displayed.

In addition, the control unit 1320 reports the cell quality result value reported after the interference situation information message, only one of a cell quality result value including IDC interference corresponding to the specific information or a result value not including IDC interference. Can be included. The standard content or standard documents referred to in the above-mentioned embodiments constitute a part of this specification, for the sake of simplicity of description of the specification. Therefore, it is to be understood that the content of the above standard content and portions of the standard documents are added to or contained in the scope of the present invention.

Specifically, the following documents, which are attached below, form a part of this specification as part of already published documents. Therefore, the addition of the contents of the standard and part of the standard documents to the specification or the description in the claims should be construed as falling within the scope of the present invention. The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

1200: base station 1300: terminal

Claims (20)

In a method for transmitting interference information in a mobile communication network,
Identifying, by the terminal, an IDC interference problem and transmitting a message including interference situation information to the base station;
Determining whether a cell quality result value including no IDC interference is measurable as a cell quality measurement result for the cell in which the IDC interference problem occurs; And
And reporting a cell quality result value for the cell in which the IDC interference problem occurs to the base station following the message containing the interference situation information about the IDC interference problem.
In measuring the quality of a cell in which the IDC interference problem occurs, at least one of the interference situation information message and the cell quality result value reporting specific information indicating this according to whether the cell quality result value including no IDC interference can be measured. Included in the terminal characterized in that for transmitting.
The method of claim 1,
When the specific information is included in the interference situation information message, the specific information is a result of not including a cell quality result value or IDC interference with respect to the cell quality result value reported after the interference situation information message. Displaying any one of the values.
3. The method of claim 2,
The cell quality result value reported after the interference situation information message includes only one of a cell quality result value including IDC interference corresponding to the specific information or a result value not including IDC interference. .
The method of claim 1,
When the specific information is included in the cell quality result report, the specific information is displayed by setting the cell quality result value to a specific value when the cell quality result value including no IDC interference cannot be measured. How to.
The method of claim 1,
The transmitting of the interference situation information message may include transmitting priority information that the terminal prefers to solve the IDC interference in the interference situation information message.
In the method for receiving a base station interference information in a mobile communication network,
Receiving, by the base station, a message including interference situation information from a terminal which identifies an in-device coexistence interference (IDC) interference problem; And
And reporting a cell quality result value according to a cell quality measurement for a cell in which the IDC interference problem occurs.
The base station acquires specific information indicating whether the cell quality result value including no IDC interference can be measured for the cell in which the IDC interference problem has occurred from at least one of the interference situation information message and the report of the cell quality result value. Characterized in that.
The method according to claim 6,
When the specific information is included in the interference situation information message, the specific information is a result of not including a cell quality result value or IDC interference with respect to the cell quality result value reported after the interference situation information message. Displaying any one of the values.
8. The method of claim 7,
The cell quality result value reported after the interference situation information message includes only one of a cell quality result value including IDC interference corresponding to the specific information or a result value not including IDC interference. .
The method according to claim 6,
When the specific information is included in the cell quality result report, the specific information is displayed by setting the cell quality result value to a specific value to indicate that a cell quality result value including no IDC interference cannot be measured. How to.
The method according to claim 6,
Determining a solution including at least one of handover and transmission / reception scheduling of the terminal for solving IDC interference based on the priority when the interference situation information message includes priority information preferred by the terminal; It further comprises a method.
An apparatus for transmitting interference information in a mobile communication network,
Receiving unit for receiving a message from the base station;
A controller for identifying an in-device coexistence interference (IDC) interference problem and identifying a cell in which the interference problem occurs; And
A transmitter which transmits a message including the interference situation information generated by the controller,
The control unit determines whether a cell quality result value including no IDC interference is measurable for the cell in which the IDC interference problem occurs, and determines whether a cell quality result value including no IDC interference can be measured. Measuring the cell quality for the cell quality result value including no IDC interference and controlling to transmit the specific information indicating the cell quality result to at least one of the interference situation information message and the cell quality result value report. Device characterized in that.
12. The method of claim 11,
When the specific information is included in the interference situation information message, the specific information is a result of not including a cell quality result value or IDC interference with respect to the cell quality result value reported after the interference situation information message. And display any one of the values.
13. The method of claim 12,
The cell quality result value report reported after the interference situation information message includes only one of a cell quality result value including IDC interference corresponding to the specific information or a result value not including IDC interference. Device.
12. The method of claim 11,
When the specific information is included in the cell quality result report, when the cell quality result value including no IDC interference cannot be measured, the cell quality result value is set to a specific value to display the specific information. Device.
12. The method of claim 11,
The control unit, characterized in that for transmitting the interference status information message including the priority information preferred by the terminal for the IDC interference resolution.
An apparatus for receiving interference information in a mobile communication network,
A transmitter for transmitting a message to the terminal;
A receiver which receives a message including interference situation information from a terminal which identifies an in-device coexistence interference (IDC) interference problem and reports a cell quality result value according to a cell quality measurement for a cell in which the IDC interference problem occurs; And
A control unit for controlling the transmitter and the receiver;
The controller may include specific information indicating whether a cell quality result value including no IDC interference may be measured for a cell in which the IDC interference problem occurs from at least one of the interference situation information message and the cell quality result value report. Obtaining device.
17. The method of claim 16,
When the specific information is included in the interference situation information message, the specific information is a result of not including a cell quality result value or IDC interference with respect to the cell quality result value reported after the interference situation information message. And display any one of the values.
18. The method of claim 17,
The cell quality result value reported after the interference situation information message includes only one of a cell quality result value including IDC interference corresponding to the specific information or a result value not including IDC interference. .
17. The method of claim 16,
When the specific information is included in the cell quality result report, the specific information is displayed by setting the cell quality result value to a specific value to indicate that a cell quality result value including no IDC interference cannot be measured. Device.
17. The method of claim 16,
The controller determines a solution including at least one of handover and transmission / reception scheduling of the terminal for IDC interference resolution based on the priority when the interference situation information message includes priority information preferred by the terminal. Device characterized in that.

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