KR20130075635A - Apparatus and method for controling in-device coexistence interference in wireless communication system - Google Patents

Abstract

PURPOSE: A device for controlling in-device coexistence interference (IDC) in a wireless communication system and a method thereof are provided to supply IDC-related information to a base station. CONSTITUTION: A receiving unit (2020) receives IDC indication setting information including an IDC triggering threshold value from a base station. The IDC triggering threshold value is used as a condition of IDC entry triggering for an IDC event indicating the start of IDC progress. A triggering unit (2007) performs the IDC entry triggering based on the IDC triggering threshold value. A transmitting unit transmits IDC indication information including a performance result of the IDC entry triggering.

Description

Apparatus and method for controlling in-device coexistence interference in a wireless communication system {APPARATUS AND METHOD FOR CONTROLING IN-DEVICE COEXISTENCE INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a wireless communication system, and more particularly, to an apparatus and method for controlling in-device coexistence interference in a wireless communication system.

Wireless communication systems generally use one bandwidth for data transmission. For example, a second-generation wireless communication system uses a bandwidth of 200 KHz to 1.25 MHz, and a third-generation wireless communication system uses a bandwidth of 5 MHz to 10 MHz. To support increasing transmission capacity, the recent 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) or Institute of Electrical and Electronics Engineers (IEEE) 802.16m continues to expand its bandwidth to 20 MHz or more. Increasing the bandwidth to increase the transmission capacity is essential, but supporting large bandwidths even at low levels of required services can result in large power consumption.

Accordingly, a multiple component carrier system has emerged, which defines a carrier having one bandwidth and a center frequency and enables data to be transmitted or received over a wide band through a plurality of carriers. By using one or more carriers, both narrow and wide bandwidths are supported simultaneously. For example, if one carrier corresponds to a bandwidth of 5 MHz, four carriers support a maximum bandwidth of 20 MHz.

Today's ubiquitous access network allows users to connect to different networks in different regions and maintain connectivity anywhere. A user in which one terminal communicates with one network system carries different devices supporting each network system. However, in recent years, as the functions of a single terminal have been advanced and complicated, communication with multiple network systems can be performed simultaneously with only one terminal, and user convenience has been increased.

However, when one terminal simultaneously communicates on multiple network system bands, In-Device Coexistence interference (IDC) may occur. In-device coexistence interference refers to interference when transmission in one frequency band interferes with reception in another frequency band in the same terminal. For example, when a terminal simultaneously supports a Bluetooth system and an 802.16 system, in-device coexistence interference may occur between the Bluetooth system band and the 802.16 system band. In-device co-existence interference can occur mainly when the spacing between frequency band boundaries of heterogeneous network systems is not wide enough.

There is a need for an in-device coexistence interference control method such as in-device coexistence interference avoidance operation.

An object of the present invention is to provide an apparatus and method for controlling coexistence interference in a device.

Another object of the present invention is to provide a method and apparatus for transmitting performance information of a terminal related to in-device coexistence interference.

Another object of the present invention is to provide a method and apparatus for transmitting and receiving an indication operation related to in-device coexistence interference.

According to an aspect of the present invention, a method of controlling in-device coexistence interference (IDC) by a terminal in a wireless communication system relates to information about an IDC presence or a frequency band where an IDC may exist. IDC indication setting information including IDC triggering threshold which is used as a condition of IDC entry triggering which triggers an IDC event indicating that an IDC is in progress. Receiving the IDC from the base station, performing the IDC entry triggering based on the IDC triggering threshold value, transmitting IDC indication information including the result of performing the IDC entry triggering to the base station and the terminal IDC The measurement setting information for setting to perform the measurement associated with the And a step for receiving from the station.

The performance information of the terminal is a frequency where the IDC may exist using the E-UTRA Absolute Radio Frequency Channel Number (EARFCN), which is assigned by dividing and numbering an operable frequency band of E-UTRA (Evolved-Universal Terrestrial Radio Access). It may include information about the band.

The performance information of the terminal may include all EARFCN corresponding to a frequency band in which the IDC may exist.

The performance information of the terminal may include an EARFCN corresponding to a boundary value of a frequency band in which the IDC may exist.

The capability information of the terminal may further include a boundary type indicator indicating whether the EARFCN is the maximum boundary value or the minimum boundary value of a frequency band in which the IDC may exist.

The capability information of the terminal may further include type information or type information of a communication system capable of generating IDC.

The IDC triggering threshold may be determined based on RSRP (Reference Signal Received Power) or RSRQ (Reference Signal Received Quality).

The IDC triggering threshold may be determined based on the activity of the IDC interference or the strength of the IDC interference, which is a ratio of the section in which IDC occurs within a predetermined section.

The IDC triggering threshold may be determined differently for each frequency band.

The IDC entry triggering may be performed based on a reference value preset in the system of the terminal.

The IDC indication information may include an IDC entry indicator indicating whether to perform IDC entry triggering.

The IDC indication information may include unusable frequency band information and time division multiplexing (TDM) pattern information.

The measurement setting information may be set to measure the strength of IDC interference for the unusable frequency band, and to perform measurement in consideration of IDC or measurement except IDC based on the strength of the IDC interference.

The measurement setting information may be set to measure activity of IDC interference for an unusable frequency band, and perform measurement in consideration of IDC or measurement except IDC based on the activity of the IDC interference.

The measurement setting information further includes a measurement restriction pattern, and the measurement restriction pattern may be a DRX (Discontinuous Reception) pattern or a bitmap pattern.

According to another aspect of the present invention, a method for controlling in-device coexistence interference by a base station in a wireless communication system includes performance information of a terminal including information on the possibility that IDC exists or information on a frequency band where IDC may exist. Receiving from the terminal, transmitting IDC indication configuration information including an IDC triggering threshold value used as a condition of IDC entry triggering to trigger an IDC event indicating that an IDC ongoing state has started, the IDC entry Receiving IDC indication information including a result of performing triggering from the terminal, and transmitting measurement setting information for setting the terminal to perform measurement related to IDC based on the IDC indication information to the terminal. .

According to another aspect of the present invention, in a wireless communication system, a terminal for controlling in-device coexistence interference may include performance information of a terminal including information on the possibility of IDC or information on a frequency band in which IDC may exist. Receiving unit for transmitting from the base station and the IDC instruction setting information including the IDC triggering threshold value used as a condition of the IDC entry triggering triggering an IDC event indicating that the IDC is in progress, the IDC triggering threshold and the IDC triggering threshold A triggering unit configured to perform the IDC entry triggering on the basis of the reference, wherein the transmitter transmits IDC indication information including the result of performing the IDC entry triggering to the base station, and the receiver performs the measurement related to the IDC. Recall measurement setting information Receive from base station.

According to another aspect of the present invention, a base station for controlling in-device coexistence interference in a wireless communication system includes the capability information of the terminal including information on the possibility of the presence of IDC or information on the frequency band in which the IDC may exist; And a transmitter configured to transmit IDC indication setting information including an IDC triggering threshold value used as a condition of IDC entry triggering to trigger an IDC event indicating that an IDC is in progress. Receives IDC indication information including a result of performing the IDC entry triggering from the terminal, and the transmission unit sets measurement setting information for setting the terminal to perform measurement related to IDC based on the IDC indication information to the terminal. send.

According to the present invention, the terminal may transmit in-device coexistence interference related information to the base station.

According to the present invention, a terminal and a base station may be configured to transmit in-device coexistence interference related information, respectively.

According to the present invention, it is possible to trigger an event indicating occurrence or termination of in-device coexistence interference in a wireless network.

According to the present invention, it is operable to avoid occurrence of in-device coexistence interference.

1 illustrates a wireless communication system to which an embodiment of the present invention is applied.
2 is an explanatory diagram for explaining in-device coexistence interference.
3 illustrates an example of in-device coexistence interference from an ISM transmitter to an LTE receiver.
4 shows an example in which an ISM band and an LTE band are divided on a frequency band.
5 is an explanatory diagram illustrating an example of mitigating in-device coexistence interference using an FDM scheme according to the present invention.
6 is an explanatory diagram showing another example of mitigating in-device coexistence interference using an FDM scheme according to the present invention.
7 and 8 are explanatory diagrams showing an example of mitigating in-device coexistence interference using a power control scheme according to the present invention.
9 is an explanatory diagram showing an example of mitigating in-device coexistence interference by using a TDM scheme applied to the present invention.
10 shows transmission / reception timings on the time axis of the LTE band and the ISM band which controlled in-device coexistence interference according to the TDM scheme.
11 illustrates another example of mitigating in-device coexistence interference by using a TDM scheme according to the present invention.
12 is a diagram illustrating another example of mitigating in-device coexistence interference using a TDM scheme applied to the present invention.
FIG. 13 is a diagram illustrating another example of mitigating in-device coexistence interference by using a TDM scheme applied to the present invention.
14 illustrates a case in which a terminal receives an interference signal in a device.
15 is a flowchart illustrating an example of operations of a terminal and a base station performing in-device coexistence interference control according to the present invention.
16 shows an example of a frequency band in which in-device coexistence interference to which the present invention is applicable may exist.
17 is a diagram illustrating an example in which a terminal performs measurement in consideration of in-device coexistence interference or measurement except in-device coexistence interference according to the present invention.
18 is a flowchart illustrating an operation of a terminal for controlling in-device coexistence interference according to the present invention.
19 is a flowchart illustrating the operation of a base station for controlling in-device coexistence interference in accordance with the present invention.
20 is a block diagram illustrating an apparatus for transmitting and receiving information about in-device coexistence interference according to an embodiment of the present invention.

Hereinafter, some embodiments will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the embodiments 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 disclosure rather unclear.

In describing the components of the present specification, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but there is another component between each component. It will be understood that may be "connected", "coupled" or "connected".

In addition, the present specification describes a wireless communication network, the operation performed in the wireless communication network is performed in the process of controlling the network and transmitting data in the system (for example, the base station) that is in charge of the wireless communication network, Work can be done at a terminal coupled to the wireless network.

1 illustrates a wireless communication system to which an embodiment of the present invention is applied.

Referring to FIG. 1, a wireless communication system is widely deployed to provide various communication services such as voice and packet data, and includes a user equipment (UE), a base station 20 (evolved NodeB, eNB), and a WLAN access point. (Wireless LAN Access Point: AP, 30), GPS (Global Positioning System, 40) satellite. Herein, the wireless LAN access point (or wireless LAN) is a device supporting IEEE (Institute of Electrical and Electronics Engineers) 802.11 technology, and IEEE 802.11 can be mixed with a WiFi system.

The terminal 10 may be located within the coverage of multiple networks such as cellular networks, wireless LANs, broadcast networks, satellite systems, and the like. The terminal 10 has a plurality of wireless transceivers for accessing various networks and various services regardless of time and place. For example, a smart phone has a Long Term Evolution (LTE), WiFi, Bluetooth (BT) transceiver and a GPS receiver. As such, the design of the terminal 10 is becoming more complex in order to integrate more and more transceivers into one and the same terminal 10 while maintaining good performance. As a result, in-device coexistence interference (IDC) is more likely to occur.

Hereinafter, downlink (DL) means communication from the base station 20 to the terminal 10, and uplink (UL) means communication from the terminal 10 to the base station 20. In downlink, the transmitter may be part of the base station 20 and the receiver may be part of the terminal 10. In addition, in uplink, the transmitter may be part of the terminal 10 and the receiver may be part of the base station 20.

The terminal 10 may be fixed or mobile and may be referred to by other terms such as a Mobile Station (MS), a User Terminal (UT), a Subscriber Station (SS), a Mobile Terminal (MT) . The base station 20 is a fixed station that communicates with the terminal 10 and includes a base station (BS), a base transceiver system (BTS), an access point, a femto base station (Femto BS) (relay).

There are no restrictions on multiple access schemes applied to wireless communication systems. (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier-FDMA , OFDM-CDMA, and the like.

2 is an explanatory diagram for explaining in-device coexistence interference.

Referring to FIG. 2, the terminal 10 includes an LTE RF 11, a GPS RF 12, and a Bluetooth / WiFi RF 13. Transmit and receive antennas 14, 15, and 16 are connected to each radio frequency (RF). That is, several kinds of RFs are closely mounted in one device platform. Here, the transmit power of one RF may be much greater than the receive power level to another RF receiver. If the frequency spacing between RFs is not sufficient and the filtering technique is not supported, then a transmission signal of one RF may cause significant interference to a receiver of another RF in the device. For example, "A" of FIG. 2 is an example of a path in which the transmission signal of the LTE RF 11 causes in-device coexistence interference with respect to the GPS RF 12 and the Bluetooth / WiFi RF 23, and the "B". Is an example of a path in which a transmission signal of the Bluetooth / WiFi RF 23 causes in-device coexistence interference with respect to the LTE RF 21.

3 illustrates an example of in-device coexistence interference from an ISM (Industrial, Scientific and Medical) transmitter to an LTE receiver. ISM transmitter refers to a transmitter that transmits in the ISB band, a band that can be freely used without a license in the industrial sciences and medical field.

Referring to FIG. 3, it can be seen that the band of the signal received at the LTE receiver overlaps the band of the transmission signal of the ISM transmitter. In this case, in-device coexistence interference may occur.

4 shows an example in which an ISM band and an LTE band are divided on a frequency band.

Referring to FIG. 4, band 40, band 7, and band 38 are LTE bands. Band 40 occupies 2300-2400 MHz band in TDD mode, uplink occupies 2500-2570 MHz band in FDD mode, and downlink occupies 2620-2690 MHz in band 7. Band 38 occupies 2570-2620 MHz band in TDD mode. Meanwhile, the ISM band is used as a Wi-Fi channel and a Bluetooth channel and occupies 2400 to 2483.5 MHz. Here, the situation in which coexistence interference occurs in the device is shown in Table 1 below.

Interference band Form of interference Band 40 ISM Tx-> LTE TDD DL Rx Band 40 LTE TDD UL Tx-> ISM Rx Band 7 LTE FDD UL Tx-> ISM Rx Band 7/13/14 LTE FDD UL Tx-> GPS Rx

Referring to Table 1, the notation 'a-b' in the form of interference indicates a situation in which transmitter a causes coexistence interference in a device to receiver b. In band 40, the ISM transmitter causes in-device co-existence interference to the downlink TDD receiver (LTE DL TDD Rx) of the LTE band. A filtering scheme can mitigate some of the coexistence interference in the device, but it is not enough. In addition to the filtering scheme, the application of frequency division multiplex (FDM) scheme can more effectively mitigate in-device coexistence interference.

5 is an explanatory diagram illustrating an example of mitigating in-device coexistence interference using an FDM scheme according to the present invention.

Referring to FIG. 5, the LTE band may be moved in the arrow direction (to the left in the frequency band axis) so that the LTE band does not overlap with the ISM band. This results in handover of the terminal from the ISM band. However, this requires a method in which legacy measurement or new signaling accurately triggers a mobility procedure or radio link failure (RLF) procedure. Alternatively, there may be a method of avoiding a problem in the LTE band with the ISM through filtering or resource allocation. Alternatively, when LTE carrier aggregation is used, overlapping interference may be avoided through a procedure of reconfiguring a set of carriers to be used.

6 is an explanatory diagram showing another example of mitigating in-device coexistence interference using an FDM scheme according to the present invention.

Referring to FIG. 6, the ISM band may be reduced and moved in the direction of the arrow (to the right in the frequency axis) to be separated from the LTE band. In this way, backward compatibility problems may occur. In the case of Bluetooth, the backward compatibility problem may be solved to some extent due to the adaptive frequency hopping mechanism. However, in the case of Wi-Fi, the backward compatibility problem is solved. This can be difficult.

7 and 8 are explanatory diagrams showing an example of mitigating in-device coexistence interference using a power control (PC) scheme according to the present invention.

Referring to FIG. 7, the terminal may lower the transmission power of the LTE signal to a certain level to avoid in-device coexistence interference to improve reception quality of the ISM band. Referring to FIG. 8, the terminal may uniformly transmit the transmission power of the ISM band. By lowering the level, the reception quality of the LTE signal can be improved by avoiding in-device coexistence interference.

9 is an explanatory diagram illustrating an example of mitigating in-device coexistence interference by using a time division multiplexing (TDM) method applied to the present invention.

Referring to FIG. 9, if the reception time of the LTE signal is changed so as not to overlap with the transmission time in the ISM band, in-device coexistence interference may be avoided. For example, if a signal of the ISM band is transmitted at t ₀ , the LTE signal is received at t ₁ .

10 shows transmission / reception timings on the time axis of the LTE band and the ISM band which controlled in-device coexistence interference according to the TDM scheme.

Referring to FIG. 10, it can be seen that in-device coexistence interference can be avoided by the TDM scheme as shown in FIG. 9 without moving between the LTE band and the ISM band.

11 illustrates another example of mitigating in-device coexistence interference by using a TDM scheme according to the present invention.

Referring to FIG. 11, as a TDM scheme based on discontinuous reception (DRX), a pattern periodicity section is a scheduled period section and an unscheduled period section. Splitting can avoid in-device coexistence interference. The UE prevents LTE from transmitting within the unscheduled period to avoid mutual interference between the LTE and the ISM, but the main LTE transmission such as random access or hybrid automatic repeat request (HARQ) retransmission is scheduled. Even within a defined period of time may be allowed. The UE prevents the transmission of the ISM within the scheduled period and allows the transmission of the LTE to avoid mutual interference between the LTE and the ISM. As with the unscheduled period, the main transmission of the ISM band such as Beacon or Wi-Fi may be allowed within the scheduled period. LTE transmission may be prevented to protect the main transmission of the ISM band. In addition, special signaling may be added to protect the main transmission of the ISM band such as a beacon. For example, information on a period of the beacon signaling and a subframe offset may be added. In this case, the subframe offset number and the system frame number may be determined based on "0". The system frame number is one of " 0 " to " 1023 " in units of radio frames in the LTE system. Since one radio frame consists of 10 subframes, the UE can know the exact frame position in the system through the subframe offset number and the system frame number.

12 is a diagram illustrating another example of mitigating in-device coexistence interference using a TDM scheme applied to the present invention. It is a TDM scheme based on HARQ.

Referring to FIG. 12, it is preferable that a retransmission signal is protected when data is transmitted based on HARQ. Here, protecting means that retransmission must be made. If retransmission is not performed to mitigate or avoid in-device coexistence interference by TDM, the performance of the system will be significantly reduced. Based on this, the transmission pattern is determined in consideration of the retransmission period. Subframes 1 and 6 are reserved in advance for DL transmission, and subframes 2 and 7 are reserved for UL transmission. This is called a scheduled subframe. Unscheduled subframes for mitigation of coexistence interference in the device are not used for transmission to protect the ISM band.

Similar to the DRX-based scheme, in the HARQ-based scheme, subframes reserved for transmission may be prevented from being transmitted for important signal transmission in the ISM band. On the contrary, even in an unscheduled subframe, transmission of important messages such as random access, system information, and paging signals may be allowed.

Such a pattern may be given as a bitmap pattern. That is, the number of server frames represented by one bit may be one or more. The period of the pattern is the product of the total length of the bitmap and the number of subframes per bit, and each bit may have a value of 0 if the subframe indicated by the bit is a scheduled subframe and a value of 1 if an unscheduled subframe. . Conversely, if the subframe indicated by each bit is a scheduled subframe, it may have a value of 1 and a non-scheduled subframe.

For example, assume that a period is 20, a pattern representing a subframe is "1001001000", an unscheduled subframe has a value of 0, and the number of subframes represented by one bit is two. In the pattern representing the subframe, since the first, fourth, and seventh bits have a value of 1, it can be seen that the subframes 0, 1, 6, 7, 12, and 13 are scheduled subframes every period.

FIG. 13 is a diagram illustrating another example of mitigating in-device coexistence interference by using a TDM scheme applied to the present invention.

Referring to FIG. 13, as an autonomously denial scheme using a TDM scheme, when in-device coexistence interference occurs, the LTE rejects transmission in order to protect ISM reception. Here, the checkmarked part means that the transmission or reception is approved, and the X marked part means that the transmission or reception is rejected. Even if the UL transmission is granted from the base station, the UE may not perform the UL transmission by rejecting the allocation to protect the ISM reception. Similarly, the ISM may reject the transmission to protect the LTE reception.

Now, in accordance with the present invention, a method of controlling in-device coexistence interference is described. Hereinafter, an operation of reducing, avoiding, or removing interference is collectively referred to as interference control or interference coordination.

Scenarios regarding the on-going IDC state of in-device coexistence interference are shown in Table 2 below.

scenario Justice One In-device coexistence interference in the serving frequency band 2 Potential in-device coexistence interference in the serving frequency band (currently not in-device coexistence interference in progress) 3 In-device coexistence interference in the frequency band other than the serving frequency band 4 Potential in-device co-existence interference in a frequency band other than the serving frequency band (currently not in-device co-existence interference in progress)

Each scenario represents an interference state based on the type of interference and the frequency band. Since the unusable frequency is irrelevant to the serving frequency band, scenario 1 and scenario 3 correspond to in-device coexistence interference.

14 illustrates a case in which a terminal receives an interference signal in a device. It is classified into seven cases based on the frequency of interference and the strength or power.

Referring to FIG. 14, when the seven cases are classified into four patterns based on the frequency of interference, cases 1 and 2 are continuous, cases 3 and 4 are frequent, and cases 5 and Case 6 are sparse, and Case 7 is a pattern of none.

When the seven cases are classified into three patterns based on the intensity of the interference, Case 1, Case 3, and Case 5 are very strong, Case 2, Case 4, and Case 6 are sufficiently weak, Case 7 is a pattern of none.

For example, when it is determined that in-device coexistence interference is in progress, it may be case 1 and case 3. The cases are at least a case where the interference is continuous or frequent and is very strong.

On the other hand, a condition that does not correspond to the in-device co-existence interference is in progress, but the in-device co-existence interference is likely to change to the ongoing state is defined as "in the presence of potential in-device coexistence interference".

For example, the terminal may determine that case 2, case 4, case 5, and case 6 of Table 2 are potential coexistence interference in the device. As another example, the terminal may determine that only case 5 having strong strength exists in the presence of potential in-device coexistence interference. Potential in-device coexistence interference Handover or RRC setting / resetting is not impossible in a frequency band in which there is a presence, and the terminal may perform measurement.

15 is a flowchart illustrating an example of operations of a terminal and a base station performing in-device coexistence interference control according to the present invention.

Referring to FIG. 15, the terminal transmits UE capability information to the base station (S1500).

The capability information of the terminal may include information about the possibility of IDC existence possibility in the device. In addition, the performance information of the terminal may include information of a frequency band (IDC possible frequency) in which there is a possibility that in-device coexistence interference may exist. Alternatively, the performance information of the terminal may include information of a frequency band in which there is no possibility of in-device coexistence interference. Alternatively, the performance information of the terminal may also include information on a frequency band in which potential in-device coexistence interference exists.

Here, a frequency band in which coexistence interference may exist in a device refers to a frequency band that may be an unusable frequency, and an unusable frequency means in-going coexistence interference in a corresponding frequency (on-going IDC). Subsequently, it means a frequency which is difficult to perform wireless communication. For example, although there is no coexistence interference at the initial LTE connection because the WiFi of the terminal is not turned on, since the band 40 is a frequency band that is likely to be an unusable frequency due to the coexistence interference in the terminal with WiFi, the band 40 is a device. It is judged to be a frequency band in which coexistence interference may exist.

In this case, the frequency band in which the coexistence interference may exist in the device may be indicated by using an E-UTRA Absolute Radio Frequency Channel Number (EARFCN). The EARFCN divides and assigns a number of operable frequency bands of E-UTRA (Evolved-Universal Terrestrial Radio Access).

For example, the performance information of the terminal may include all EARFCN values of the frequency band in which there is a possibility that the in-device coexistence interference may exist.

As another example, the performance information of the terminal may include an EARFCN corresponding to a boundary value of a frequency band in which there may be in-device coexistence interference. The boundary value may be an upper bound or a lower bound.

16 shows an example of a frequency band in which in-device coexistence interference to which the present invention is applicable may exist.

Referring to FIG. 16, a frequency band in which in-device coexistence interference may exist is a section between a minimum boundary value in band 40 and a maximum boundary value in band 7.

The performance information of the terminal may include an EARFCN corresponding to the minimum threshold value, and based on this, the base station may determine that in-device coexistence interference may occur in a frequency band larger than the minimum threshold value.

Alternatively, the performance information of the terminal may include an EARFCN corresponding to the maximum boundary value, and based on this, the base station may determine that in-device coexistence interference may occur in a frequency band smaller than the maximum boundary value. .

In this case, whether the EARFCN included in the performance information of the terminal is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard.

Alternatively, an indicator indicating whether the EARFCN is the maximum boundary value or the minimum boundary value may be further included in the performance information of the terminal. Such an indicator may be referred to as a bound type indicator. The base station may determine a frequency band in which in-device coexistence interference may occur based on the EARFCN and the boundary type indicator.

Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN included in the performance information of the terminal belongs. For example, in FIG. 16, the boundary value is the maximum boundary value for the band 7, and the boundary value is the minimum boundary value for the band 41. As such, even without the boundary type indicator, the base station may implicitly know which boundary value the EARFCN is based on the operating band number to which the EARFCN belongs. This is because different EARFCNs may indicate the same frequency band. Of the E-UTRA operating bands, band 7 corresponds to 2500-2570Mhz and 2620-2690Mhz, and band 41 corresponds to 2496-2690Mhz, so the frequency bands overlap. However, the number of operating bands is different from the band 7 and the band 41, respectively, and have different EARFCN values. The duplexing scheme also differs from the band 7 in the FDD scheme and the band 41 in the TDD scheme.

As another example, the performance information of the terminal includes the EARFCN, the EARFCN may indicate that there is a possibility that there is an in-device coexistence interference in the operating band region itself where the EARFCN is located. That is, the EARFCN may be used to indicate an operation band unit. For example, when the EARFCN corresponding to the minimum boundary value of FIG. 16 is included in the performance information of the terminal, the base station may determine that there is a possibility of in-device coexistence interference in band 40 based on this.

As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the base station may determine that there is a possibility of in-device coexistence interference in all of the plurality of operating bands. For example, when the frequency indicated by the EARFCN is 2500Mhz, the base station may determine that there is a possibility that in-device coexistence interference exists in both band 7 and band 41 including 2500Mhz.

In addition, the performance information of the terminal may include type information or type information of another communication system that may cause in-device coexistence interference. The type information of the other communication system may be one of a wireless LAN (WLAN), a Bluetooth (BT) or a Global Navigation Satellite System (GNSS). The type information of another communication system may be one of a voice communication type, a streaming type such as multimedia (eg, Video On Demand (VOD)), or an offload type. The scope of the present invention is not limited thereto, and may include the type and type information of various communication systems.

In addition, the performance information of the terminal may include frequency band information that may generate in-device coexistence interference in the other communication system together with type information or type information of another communication system that may generate in-device coexistence interference. .

In addition, the performance information of the terminal may include information indicating the ISM performance of the terminal. Based on the ISM performance information of the terminal, the terminal may adjust the maximum transmission value of the LTE uplink transmission power and reduce interference between the LTE band and the ISM band.

In addition, the performance information of the terminal may include an ICO performance indicator indicating whether the terminal has the capability (capability) to perform in-device COexistetnce interference avoidance (ICO). If the ICO performance indicator indicates that the terminal is incapable of controlling in-device coexistence interference, the base station may determine that it is unnecessary to transmit information related to the in-device coexistence interference control to the terminal. As an example, the ICO performance indicator is a bitmap indicator. For example, when the indicator is 0, it indicates that there is no capability to control in-device coexistence interference, and when the indicator is 1, it indicates that it is capable of controlling in-device coexistence interference.

For example, the terminal performance information message includes a physical layer parameter information entity or a measurement parameter information entity, and the physical layer parameter information entity includes: It may include an ICO performance indicator. The ICO performance indicator indicates whether the terminal has the capability to support in-device coexistence interference control operations. In addition, the measurement parameter information entity may include a frequency band information (band information) in the form of a list that may be in progress coexistence interference in the device. The frequency band information may include not only the frequency at which coexistence interference is in progress, but also information on a frequency band in which potential in-device coexistence interference exists.

Following step S1500, the base station transmits an RRC connection reconfiguration message to the terminal (S1505). The RRC connection reconfiguration message includes information for setting an in-device co-existence interference related information indication (hereinafter, referred to as "IDC indication") operation to be performed by the terminal.

For example, the RRC connection reset message is a threshold value (hereinafter, "IDC triggering threshold") used as a condition for triggering an event indicating that an in-device coexistence interference ongoing state of the terminal has started or ended. Is called).

The IDC triggering threshold is an IDC triggering entry threshold or an IDC triggering release threshold. In this case, the IDC triggering entry threshold and the IDC triggering release threshold may be the same value or different values. In addition, the IDC triggering threshold may be a value related to the measurement value of the LTE downlink, and may be used as a triggering condition for the interference direction from ISM to LTE.

The IDC triggering threshold may be determined based on a reference signal received power (RSRP) value or may be determined based on a reference signal received quality (RSRQ) value. The IDC triggering threshold may be determined based on the strength of in-device coexistence interference. Alternatively, the IDC triggering threshold may be determined in consideration of the strength of the in-device coexistence interference and the activity at the same time. Here, the activity of in-device coexistence interference means a ratio of a section in which in-device coexistence interference occurs. For example, the IDC triggering threshold may be determined to perform IDC triggering when the strength of in-device coexistence interference is equal to or greater than a predetermined first threshold and the activity of in-device coexistence interference is equal to or greater than a predetermined second threshold.

In addition, the IDC triggering threshold may be set differently for each frequency band or operating band.

Meanwhile, the UE may transmit an acknowledgment of receiving the RRC connection reconfiguration message by sending an RRC resetting completion message to the base station (not shown).

Subsequently to step S1505, the UE triggers an event indicating that an in-device coexistence interference ongoing state has started for the available frequency band (hereinafter referred to as "IDC entry triggering") (S1510).

For example, when the terminal receives the IDC triggering entry threshold value through the RRC connection reconfiguration message, IDC entry triggering may be performed based on the IDC triggering entry threshold value.

As another example, when the terminal does not receive the IDC triggering entry threshold, IDC entry triggering may be performed by a terminal internal criterion (eg, "UE internal coordination").

As another example, when the terminal does not receive the IDC triggering entry threshold, IDC entry triggering may be performed based on a preset reference value. The preset reference value is a preset value in the system, and is a value previously known by the base station and the terminal without signaling between the base station and the terminal.

In this case, the preset reference value may be an RSRP value or an RSRQ value. That is, IDC entry triggering is performed when the measured RSRP or RSRQ value is larger than the preset reference value.

Alternatively, the preset reference value may be an intensity related value of in-device coexistence interference. That is, IDC entry triggering is performed when the measured strength of in-device coexistence interference is greater than a preset reference value.

Alternatively, the preset reference value may be a value considering both strength and activity of coexistence interference in the device. That is, IDC entry triggering is performed when the measured intensity of in-device coexistence interference is greater than the preset reference value and the activity of the measured in-device coexistence interference is greater than the preset reference value.

Meanwhile, the IDC entry triggering may be performed only in the serving cell. Alternatively, the IDC entry triggering may be performed for all cells of a frequency band in which in-device coexistence interference problem occurs seriously.

Following step S1510, the terminal transmits IDC indication information to the base station and transmits information related to in-device coexistence interference to the base station (S1515). That is, the terminal performs an IDC indication operation.

The IDC indication information may include a separate IDC entry indicator indicating whether to trigger the IDC entry. The IDC entry indicator may be a bitmap indicator. For example, when the indicator is 0, IDC entry triggering is not performed. When the indicator is 1, IDC entry triggering is performed.

The IDC indication information may include unavailable frequency band information or TDM pattern information. In this case, even if the IDC indication information does not include a separate IDC entry indicator, the base station may implicitly determine the situation of in-device coexistence interference such as whether IDC entry triggering is performed through the unusable frequency band information.

The unusable frequency band information may be indicated through EARFCN.

For example, the IDC indication information may include all EARFCN values of the unusable frequency band.

As another example, the IDC indication information may include an EARFCN corresponding to a boundary value of the unusable frequency band. The boundary value may be a maximum boundary value or a minimum boundary value. When the IDC indication information includes the EARFCN corresponding to the minimum boundary value, the base station may determine that the terminal cannot use a frequency band larger than the minimum boundary value. In addition, when the IDC indication information includes the EARFCN corresponding to the maximum threshold value, the base station may determine that the terminal cannot use a frequency band larger than the minimum threshold value.

In this case, whether the EARFCN included in the IDC indication information is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard.

Alternatively, an indicator (boundary type indicator) indicating whether the EARFCN is the maximum boundary value or the minimum boundary value may be further included in the IDC indication information. The base station may determine the unusable frequency band based on the EARFCN and the boundary type indicator.

Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN included in the IDC indication information belongs. For example, in FIG. 16, the boundary value is the maximum boundary value for the band 7, and the boundary value is the minimum boundary value for the band 41.

As another example, the IDC indication information includes an EARFCN. The EARFCN may indicate that an operating band region including the EARFCN is an unusable frequency band. That is, the EARFCN may be used to indicate an operation band unit. For example, when the EARFCN corresponding to the minimum boundary value of FIG. 16 is included in the performance information of the terminal, the base station may determine that the band 40 is an unusable frequency band based on this.

As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the base station may determine that all of the plurality of operating bands are unavailable bands. For example, when the frequency indicated by the EARFCN is 2500Mhz, the base station may determine that both the band 7 and the band 41 including 2500Mhz is an unusable band.

The TDM pattern information may include at least one of a DRX period, a DRX active duration, and a DRX subframe offset.

The IDC indication information may include one piece of unusable frequency band information and one piece of TDM pattern information, or may include a plurality of pieces of unusable frequency band information and a plurality of TDM pattern information. If the IDC indication information includes a plurality of unusable frequency band information and a plurality of TDM pattern information, the unusable frequency band information and the TDM pattern information may be transmitted in pairs.

Following step S1515, the base station transmits an RRC connection reconfiguration message to the terminal (S1520). The RRC connection reset message includes measurement setting information for setting a measurement to be performed by the terminal.

For example, the measurement setting information may include measurement indication information (hereinafter, referred to as “IDC measurement indication information”) of in-device coexistence interference indicating that measurement related to in-device coexistence interference is performed. In this case, the information may be set to limit the ISM transmission only in the measurement gap for the unusable frequency band.

In addition, the IDC measurement indication information instructs the terminal to perform the measurement in consideration of the in-device coexistence interference for the unusable frequency band, or indicates to perform the measurement except the in-device coexistence interference, or the measurement and the device in consideration of the coexistence interference in the device It can be indicated that all measurements except coexistence interference are performed.

In addition, the IDC measurement indication information, the terminal first measures the strength of the in-device coexistence interference for the unusable frequency band, and based on the strength of the in-device coexistence interference, the measurement or in-device coexistence interference considering the in-device coexistence interference It may indicate that measurements are not taken into account.

The IDC measurement indication information is a measurement in which the terminal first measures the strength and activity of the in-device coexistence interference for the unusable frequency band, and considers the in-device coexistence interference based on the strength and activity of the in-device coexistence interference. Alternatively, it may be indicated to perform a measurement that does not consider in-device coexistence interference.

As another example, the measurement configuration information may include a measurement restriction pattern as well as IDC measurement indication information. In this case, the measurement restriction pattern may be in the form of a DRX pattern or in the form of a bitmap pattern.

Meanwhile, the IDC measurement indication information may be expressed as a report IDC quantity. The report IDC quantity is a new type of report quantity that sets the information reported by the UE to the base station includes measurement results related to in-device co-existence interference due to triggering in-device co-existence interference. Specifically, the report IDC quantity includes measurement report information that the UE reports to the base station includes a TDM pattern, an unusable frequency band, or an additional measurement result (for example, an additional report on measurement with in-device coexistence interference). Can be instructed. The report IDC quantity may be a bitmap indicator. The report IDC quantity may be included in a measurement configuration information entity of an RRC connection reset message.

After step S1520, the UE reports the result of the measurement to the base station according to the rule for obtaining a measurement sample (S1525). The measurement result report may be reported through a measurement report message. For example, the measurement result report information may be included in a measurement result information element in the measurement report message and transmitted.

The UE may perform measurement in consideration of in-device coexistence interference or measurement except in-device coexistence interference.

17 is a diagram illustrating an example in which a terminal performs measurement in consideration of in-device coexistence interference or measurement except in-device coexistence interference according to the present invention.

Referring to FIG. 17, the terminal is affected by in-device coexistence interference in a section (first section) in which in-device coexistence interference occurs in a serving cell or neighbor cell. The measurement sample having the above-described measurement is obtained, and the measurement sample having no influence of the in-device coexistence interference is obtained in the section (second section) where the in-device coexistence interference does not occur. Here, the neighbor cell refers to a cell that is set through an RRC connection resetting process and used as a comparison group of measurement report events. In addition, the terminal obtains a measurement sample in the entire period (third section) regardless of the in-device coexistence interference in the serving cell or the neighboring cell where the in-device coexistence interference does not occur. In this case, the UE may obtain a measurement sample in every subframe, a predetermined subframe, or a random subframe within each interval.

For example, in the first section, the measurement sample having the influence of in-device coexistence interference may include in-device coexistence interference, inter-cell interference (eg, interference of co-channel serving and non-serving cells of the same channel). non-serving cells, adjacent channel interference, etc.), and a measurement sample that takes into account the effects of the sum of the thermal noise together, and has no effect of in-device coexistence interference in the second interval. Measurement samples are measurement samples with only the effect of intercell interference or thermal noise.

Here, the first network system refers to a network system that provides the effect of interference when in-device coexistence interference occurs. The network system attacked by the interference may be referred to as a second network system. For example, when the ISM receiver is interfered with by LTE uplink, the ISM is the second network system. On the contrary, when the ISM transmitter receives interference from the LTE downlink receiver, the LTE system is the second network system.

The measurement sample without the effect of in-device coexistence interference in a neighbor cell obtained based on RSRQ is conceptually represented by Equation 1 below.

Where S is the strength of the received signal through the neighbor cell in the second network system, I is the strength of the interference signal (e.g., inter-cell interference) acting on the second network system, and N is noise (e.g., , Thermal noise). In other words, the measurement sample refers to a relative ratio of interference and noise of the received signal.

The measurement sample without the effect of in-device coexistence interference in a neighboring cell obtained based on RSRP is conceptually expressed as Equation 2 below.

Here, S denotes the strength of the received signal through the neighbor cell in the second network system. That is, the measurement sample refers to the strength of the received signal in the corresponding neighbor cell in the second network system.

The measurement sample having the effect of in-device coexistence interference in a serving cell obtained based on RSRQ is conceptually represented by Equation 3 below.

Where S is the strength of the received signal through the serving cell in the second network system, I is the strength of the interference signal (e.g., inter-cell interference) acting on the second network system, and N is noise (e.g., , Thermal noise), and I 'is the strength of in-device coexistence interference. That is, the measurement sample refers to a relative ratio of in-device co-existence interference and inter-cell interference of the received signal.

The measurement sample having the effect of in-device coexistence interference in a serving cell obtained based on RSRP is conceptually expressed as Equation 4 below.

Here, I 'is the strength of the in-device coexistence interference, and the measurement sample means the strength of the in-device coexistence interference signal in the serving cell. S is the strength of the received signal in the second network system. If you only want to measure the effects of in-device coexistence interference, I 'will be the result. If in-device coexistence interference is mixed, S + I 'will be the result. If the value of eliminating in-device co-existence interference is measured, S will be the result.

Meanwhile, the entity performing the measurement (eg, the terminal) may be one entity, and the entity performing the measurement may be plural. For example, an entity performing measurement in consideration of in-device coexistence interference and an entity performing measurement in consideration of in-device coexistence interference may exist independently.

On the other hand, the measurement results considering the in-device coexistence interference and the measurement results except the in-device coexistence interference will be described. In general, the measurement result refers to a value finally calculated by filtering the measurement samples. For example, in case of LTE, the final RSRP and RSRP values generated through L1 filtering and L3 filtering are reported to the base station. However, the measurement result considering in-device coexistence interference is a result of filtering only measurement samples including in-device coexistence interference, or measuring samples including in-device coexistence interference and in-device coexistence interference. The samples may be the result of filtering all. In addition, the measurement result excluding in-device coexistence interference is a result of filtering only measurement samples that do not include in-device coexistence interference, or in-device coexistence interference together with measurement samples that do not include in-device coexistence interference. The measurement samples may be the result of filtering the measurement samples to remove the in-device coexistence interference by the interference cancellation technique.

As an example according to the present invention, the measurement report message may include a result of performing a measurement except for in-device coexistence interference. The terminal performs measurement by using a measurement sample that does not include in-device coexistence interference.

As another example, the measurement report message may include a result of performing a measurement considering in-device coexistence interference. The terminal performs the measurement by using the measurement sample including the coexistence interference in the device.

As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the result of the measurement in consideration of the in-device coexistence interference. The terminal performs the measurement using both the measurement sample including the in-device coexistence interference and the measurement sample not including the in-device coexistence interference.

As another example, the measurement report message may include both the result of the measurement in consideration of the in-device coexistence interference and the strength of the in-device coexistence interference.

As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the strength of the in-device coexistence interference.

As another example, the measurement report message may include both the result of performing the measurement in consideration of in-device coexistence interference, and the strength and activity of the in-device coexistence interference.

As another example, the measurement report message may include both the result of performing the measurement except the in-device coexistence interference, and the strength and activity of the in-device coexistence interference.

Subsequently to step S1525, the base station selects the most suitable in-device coexistence interference control scheme based on the measurement report information (S1530).

In this case, the in-device coexistence interference control method may be an FDM operation or a TDM operation. The FDM operation or the TDM operation may be an operation according to FIGS. 5 to 13.

For example, when a problem occurs in a frequency band provided by a base station, the available frequency band according to the measurement result report information does not cause a problem due to load balancing and does not have a significant effect on handover. If it is determined (eg, when the RSRP or RSRQ value of the corresponding frequency band is sufficiently large), the FDM operation may be performed, otherwise the TDM operation may be performed in the serving cell.

Following step S1530, the base station transmits the in-device coexistence interference control operation determined through the RRC connection reconfiguration message to the terminal (S1535). Based on this, the ICO operation is performed at the base station or the terminal.

For example, when the determined in-device coexistence interference control operation is an FDM operation, the secondary serving cell may be changed through a serving cell management operation (for example, deletion of a secondary serving cell in question). Alternatively, a handover procedure for changing the primary serving cell may be initiated.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, a specific DRX pattern may be transmitted through the RRC connection reconfiguration message.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, an indicator indicating that the DRX pattern is caused by in-device coexistence interference together with a specific DRX pattern may be transmitted through the RRC connection reconfiguration message. The measurement performed by the terminal according to the indication of the indicator may be changed differently from the measurement in step S1525.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, HARQ retransmission in the LTE band may be rejected for handling of a beacon when transmitting a signal in the ISM band. That is, the start of the in-device coexistence interference control operation may be instructed through IDC indication information.

Subsequently to step S1535, the UE triggers an event indicating that the in-device coexistence interference ongoing state has ended for the unusable frequency band (hereinafter referred to as "IDC release triggering") (S1540). In this case, the in-device coexistence interference in progress state is ended when the in-device coexistence interference is sufficiently small or very rarely occurred in the corresponding frequency band, thereby indicating that the communication is not difficult.

For example, when the terminal receives the IDC triggering release threshold through an RRC connection reconfiguration message (steps S1505, S1520 or S1535), IDC release triggering may be performed based on the IDC triggering release threshold.

As another example, when the terminal does not receive the IDC triggering cancellation threshold, IDC cancellation triggering may be performed according to an internal terminal (for example, terminal internal adjustment).

As another example, when the terminal does not receive the IDC triggering release threshold, IDC release triggering may be performed based on a preset reference value. The preset reference value is a preset value in the system. In this case, the preset reference value may be an RSRP value or an RSRQ value. That is, IDC resolution triggering is performed when the measured RSRP or RSRQ value is larger than the preset reference value. Alternatively, the preset reference value may be an intensity related value of in-device coexistence interference. That is, IDC resolution triggering is performed when the measured strength of in-device coexistence interference is greater than a preset reference value. Alternatively, the preset reference value may be a value considering both strength and activity of coexistence interference in the device. That is, when the measured intensity of in-device coexistence interference is greater than the preset reference value, and the activity of the measured in-device coexistence interference is greater than the preset reference value, IDC resolution triggering is performed.

Meanwhile, the IDC resolution triggering may be performed only in the serving cell. Alternatively, the IDC resolution triggering may be performed for all cells of a frequency band in which in-device coexistence interference problem occurs seriously.

In step S1540, the terminal transmits IDC indication information to the base station and transmits information related to in-device coexistence interference to the base station (S1545). The IDC instruction operation is performed again.

For example, the IDC indication information may include a separate IDC resolution indicator indicating whether to trigger the IDC resolution. The IDC resolution indicator may be a bitmap indicator. For example, when the indicator is 0, IDC release triggering is not performed. When the indicator is 1, IDC release triggering is performed.

If IDC entry triggering has been previously performed for a plurality of operating bands (or frequency bands), the base station may know that the IDC cancellation triggering is performed only for a specific operating band (or frequency band) indicated by the IDC cancellation indicator. have. That is, in the operating band (or frequency band) in which IDC cancellation triggering is not performed, the state in which IDC entry triggering is performed is maintained.

The IDC entry indicator in step S1515 may be set in connection with the IDC resolution indicator in S1545.

For example, when the IDC entry indicator is 1, it may indicate that IDC entry has been performed, and when the IDC release indicator is 0, it may indicate that IDC entry is resolved. Alternatively, when the IDC entry indicator is 0, it may indicate that IDC entry has been performed, and when the IDC release indicator is 1, it may indicate that IDC entry is resolved. That is, the terminal may transmit the IDC indication / release to the base station through the 1-bit indicator.

This indicator may be set according to a predetermined appointment of the network and the terminal.

Also, the indicator indicating the IDC entry indication / release may be set to a bit longer than the 1 bit.

As another example, the IDC indication information may include unusable frequency band information or TDM pattern information. At this time, even if the IDC indication information does not include a separate IDC resolution indicator, the base station can implicitly determine the situation of in-device coexistence interference such as whether to trigger IDC resolution by changing whether unusable frequency band information is changed. have. That is, the base station may implicitly determine that the IDC resolution triggering is performed when the frequency band included in the unavailable frequency band is changed to not included in the unavailable frequency band.

In this case, the unusable frequency band information may be indicated through EARFCN.

For example, the IDC indication information may include all EARFCN values of the unusable frequency band.

As another example, the IDC indication information may include an EARFCN corresponding to a boundary value of the unusable frequency band. The boundary value may be a maximum boundary value or a minimum boundary value as shown in FIG. 16.

That is, when the IDC indication information includes the EARFCN corresponding to the minimum threshold value, the base station may determine that the terminal cannot use a frequency band larger than the minimum threshold value. In addition, when the IDC indication information includes the EARFCN corresponding to the maximum threshold value, the base station may determine that the terminal cannot use a frequency band larger than the minimum threshold value.

In this case, whether the EARFCN included in the IDC indication information is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard.

Alternatively, an indicator (boundary type indicator) indicating whether the EARFCN is the maximum boundary value or the minimum boundary value may be further included in the IDC indication information. The base station may determine the unusable frequency band based on the EARFCN and the boundary type indicator.

Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN included in the IDC indication information belongs.

As another example, the EARFCN included in the IDC indication information may indicate that an operating band region including the EARFCN is an unusable frequency band. That is, the EARFCN may be used to indicate an operation band unit.

As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the base station may determine that all of the plurality of operating bands are unavailable bands.

The TDM pattern information may include at least one of a DRX cycle, a DRX operation interval, and a DRX subframe offset.

The IDC indication information may include one piece of the unusable frequency band information and one piece of TDM pattern information, or may include a plurality of pieces of unusable frequency band information and a plurality of TDM pattern information. If the IDC indication information includes a plurality of unusable frequency band information and a plurality of TDM pattern information, the unusable frequency band information and the TDM pattern information may be transmitted in pairs.

Following step S1545, the base station transmits an RRC connection reconfiguration message to the terminal (S1550). The RRC connection reset message includes measurement setting information for setting a measurement to be performed by the terminal.

The measurement setting information may be set similarly to the measurement setting information of the step S1520. That is, the measurement setting information may include IDC measurement indication information indicating that measurement related to in-device coexistence interference is performed, and when the measurement setting information includes IDC measurement indication information, measurement is performed for an unusable frequency band. The information may be configured to limit ISM transmission only in the gap. The IDC measurement indication information is measured by the terminal for the unusable frequency band in consideration of in-device coexistence interference, measurement except in-device coexistence interference, measurement in consideration of in-device coexistence interference and measurement except in-device coexistence interference. Can be instructed to perform both. In addition, the IDC measurement indication information, the terminal measures the strength of the in-device coexistence interference for the unusable frequency band, the measurement considering the in-device coexistence interference based on the strength of the in-device coexistence interference (or in consideration of the in-device coexistence interference Not measured). In addition, the IDC measurement indication information is a measurement in which the terminal measures the strength and activity of the in-device coexistence interference for the unusable frequency band, and considers the in-device coexistence interference based on the strength and activity of the in-device coexistence interference (or Measurement without taking into account in-device co-existence interference).

As another example, the measurement setting information may include a measurement limit pattern as well as IDC measurement indication information. In this case, the measurement restriction pattern may be in the form of a DRX pattern or in the form of a bitmap pattern. The IDC measurement indication information may be represented by a report IDC quantity, wherein the report IDC quantity may include a TDM pattern, an unusable frequency band, or an additional measurement result (eg, in a device). Additional reports on measurements with coexistence interference). The report IDC quantity may be a bitmap indicator.

On the other hand, unlike step S1520, the measurement setting information of step S1550 includes information about a change in at least one of a DRX period, a DRX operation interval, or a DRX subframe offset, or information for releasing the measurement limit when there is a measurement limit. It may include.

Following step S1550, the UE does not consider in-device coexistence interference in a serving cell or neighbor cell in which a measurement or in-device coexistence interference is present in a serving cell or neighbor cell where there is in-device coexistence interference. The measurement is performed again according to a rule for obtaining a measurement sample, and the updated measurement result report information is transmitted to the base station (S1555). The unusable frequency band information is information updated after the previously performed in-device coexistence interference control operation, and the measurement report information is a release report for reporting that the progress of in-device coexistence interference has been completed for the unusable frequency band. It may further include.

For example, the measurement report message may include a result of performing measurement excluding coexistence interference in the device. As another example, the measurement report message may include a result of performing a measurement considering in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the result of the measurement in consideration of the in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement in consideration of the in-device coexistence interference and the strength of the in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the strength of the in-device coexistence interference. As another example, the measurement report message may include both the result of performing the measurement in consideration of in-device coexistence interference, and the strength and activity of the in-device coexistence interference. As another example, the measurement report message may include both the result of performing the measurement except the in-device coexistence interference, and the strength and activity of the in-device coexistence interference. In this case, the entity performing the measurement (eg, the terminal) may be one entity, and the entity performing the measurement may be a plurality.

Subsequently, if the in-device coexistence interference control operation is further required, the base station selects the most suitable in-device coexistence interference control method based on the updated measurement result, and the base station may transmit the in-device coexistence interference control operation. (Not shown).

18 is a flowchart illustrating an operation of a terminal for controlling in-device coexistence interference according to the present invention.

Referring to FIG. 18, the terminal transmits performance information of the terminal to the base station (S1800).

The performance information of the terminal may include information on the possibility of in-device coexistence interference (frequency bands in which there may be in-device coexistence interference, frequency bands in which there is no possibility of in-device coexistence interference, or frequency bands in which potential in-device coexistence interference exists). ) May be included.

The frequency band in which the in-device coexistence interference may exist may be indicated using EARFCN. For example, the performance information of the terminal includes all EARFCN values of the frequency band in which the in-device coexistence interference may exist, or the boundary value (maximum boundary value or the minimum of frequency bands in which the in-device coexistence interference may exist). EARFCN corresponding to a boundary value). In this case, whether the EARFCN is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard, or a boundary type indicator may be further included in the performance information of the terminal. Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN belongs. Alternatively, the EARFCN may indicate that the operating band region itself in which the EARFCN is located may exist in the device. As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the EARFCN may indicate that there is a possibility of in-device coexistence interference in all of the plurality of operating bands.

In addition, the performance information of the terminal may include type information or type information of another communication system that may cause in-device coexistence interference. In addition, the performance information of the terminal may include frequency band information that may generate in-device coexistence interference in the other communication system together with type information or type information of another communication system that may generate in-device coexistence interference. .

In addition, the performance information of the terminal may include an ICO performance indicator indicating whether the terminal has the ability to perform in-device coexistence interference control. As an example, the ICO performance indicator is a bitmap indicator.

For example, the terminal performance information message may include a physical layer parameter information entity or a measurement parameter information entity, and the physical layer parameter information entity may include an ICO performance indicator. The ICO performance indicator indicates whether the terminal has the capability to support in-device coexistence interference control operations. In addition, the measurement parameter information entity may include frequency band information in the form of a list that may be in progress of coexistence interference in the device. The frequency band information may include not only the frequency at which coexistence interference is in progress, but also information on a frequency band in which potential in-device coexistence interference exists.

Following step S1800, the terminal receives an RRC connection reconfiguration message from the base station (S1805). The RRC connection reset message includes information for setting an IDC indication operation.

For example, the RRC connection reset message includes an IDC triggering threshold. The IDC triggering threshold is an IDC triggering entry threshold or an IDC triggering cancellation threshold. The IDC triggering threshold may be determined based on RSRP value, based on RSRQ value, based on strength of in-device coexistence interference, or may be determined in consideration of strength and activity of in-device coexistence interference at the same time. In addition, the IDC triggering threshold may be set differently for each frequency band or operating band.

Meanwhile, the terminal may transmit an acknowledgment of receiving the RRC connection reconfiguration message by sending an RRC resetting completion message to the base station (not shown).

Following step S1805, the UE performs IDC entry triggering (S1810).

For example, when the terminal receives the IDC triggering entry threshold value through the RRC connection reconfiguration message, IDC entry triggering may be performed based on the IDC triggering entry threshold value.

As another example, when the terminal does not receive the IDC triggering entry threshold, IDC entry triggering may be performed based on the terminal internal criteria (eg, the terminal internal adjustment).

As another example, when the terminal does not receive the IDC triggering entry threshold, IDC entry triggering may be performed based on a preset reference value.

In this case, the preset reference value may be an RSRP value or an RSRQ value. That is, IDC entry triggering is performed when the measured RSRP or RSRQ value is larger than the preset reference value.

Alternatively, the preset reference value may be an intensity related value of in-device coexistence interference. That is, IDC entry triggering is performed when the measured strength of in-device coexistence interference is greater than a preset reference value.

Alternatively, the preset reference value may be a value considering both strength and activity of coexistence interference in the device. That is, IDC entry triggering is performed when the measured intensity of in-device coexistence interference is greater than the preset reference value and the activity of the measured in-device coexistence interference is greater than the preset reference value.

Meanwhile, the IDC entry triggering may be performed only in the serving cell. Alternatively, the IDC entry triggering may be performed for all cells of a frequency band in which in-device coexistence interference problem occurs seriously.

After step S1810, the terminal transmits IDC indication information to the base station and performs an IDC indication operation for transmitting information related to in-device coexistence interference (S1815).

The IDC indication information may include a separate IDC entry indicator indicating whether to trigger the IDC entry. The IDC entry indicator may be a bitmap indicator.

The IDC indication information may include unavailable frequency band information or TDM pattern information. In this case, even if the IDC indication information does not include a separate IDC entry indicator, the base station may implicitly determine the situation of in-device coexistence interference such as whether IDC entry triggering is performed through the unusable frequency band information.

The unusable frequency band information may be indicated through EARFCN.

For example, the IDC indication information may include all EARFCN values of the unusable frequency band. As another example, the IDC indication information may include an EARFCN corresponding to a boundary value (maximum boundary value or minimum boundary value) of the unusable frequency band. In this case, whether the EARFCN included in the IDC indication information is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard, or the boundary type indicator may be further included in the IDC indication information. Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN included in the IDC indication information belongs. As another example, the IDC indication information includes an EARFCN. The EARFCN may indicate that an operating band region including the EARFCN is an unusable frequency band. As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the base station may determine that all of the plurality of operating bands are unavailable bands.

The TDM pattern information may include at least one of a DRX cycle, a DRX operation interval, and a DRX subframe offset.

The IDC indication information may include one piece of unusable frequency band information and one piece of TDM pattern information, or may include a plurality of pieces of unusable frequency band information and a plurality of TDM pattern information. If the IDC indication information includes a plurality of unusable frequency band information and a plurality of TDM pattern information, the unusable frequency band information and the TDM pattern information may be transmitted in pairs.

Following step S1815, the terminal receives an RRC connection reconfiguration message from the base station (S1820). The RRC connection reset message includes measurement setting information for setting a measurement to be performed by the terminal.

As an example, the measurement setting information includes IDC measurement indication information. In this case, the information may be set to limit ISM transmission only in the measurement gap for the unusable frequency band.

In addition, the IDC measurement indication information instructs the terminal to perform the measurement in consideration of the in-device coexistence interference for the unusable frequency band, or indicates to perform the measurement except the in-device coexistence interference, or the measurement and the device in consideration of the coexistence interference in the device It can be indicated that all measurements except coexistence interference are performed.

In addition, the IDC measurement indication information, the terminal first measures the strength of the in-device coexistence interference for the unusable frequency band, and based on the strength of the in-device coexistence interference, the measurement or in-device coexistence interference considering the in-device coexistence interference It may indicate that measurements are not taken into account.

The IDC measurement indication information is a measurement in which the terminal first measures the strength and activity of the in-device coexistence interference for the unusable frequency band, and considers the in-device coexistence interference based on the strength and activity of the in-device coexistence interference. Alternatively, it may be indicated to perform a measurement that does not consider in-device coexistence interference.

As another example, the measurement setting information may include a measurement limit pattern as well as IDC measurement indication information. In this case, the measurement restriction pattern may be in the form of a DRX pattern or in the form of a bitmap pattern.

Meanwhile, the IDC measurement indication information may be expressed as a report IDC quantity. The report IDC quantity may indicate that the measurement report information reported by the UE to the base station includes a TDM pattern, an unusable frequency band, or an additional measurement result (for example, an additional report on measurement with in-device coexistence interference). Can be. The report IDC quantity may be a bitmap indicator. The report IDC quantity may be included in the measurement configuration information entity of the RRC connection reset message.

Subsequently to step S1820, the UE performs measurement according to a rule for obtaining a measurement sample and reports the result of the measurement to the base station (S1825). The measurement result report may be reported through a measurement report message. For example, the measurement result report information may be included in the measurement result information entity in the measurement report message and transmitted.

The UE may perform measurement in consideration of in-device coexistence interference or measurement except in-device coexistence interference.

The measurement report message may include a result of performing measurement excluding in-device coexistence interference. The terminal performs measurement by using a measurement sample that does not include in-device coexistence interference.

As another example, the measurement report message may include a result of performing a measurement considering in-device coexistence interference. The terminal performs the measurement by using the measurement sample including the coexistence interference in the device.

As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the result of the measurement in consideration of the in-device coexistence interference. The terminal performs the measurement using both the measurement sample including the in-device coexistence interference and the measurement sample not including the in-device coexistence interference.

As another example, the measurement report message may include both the result of the measurement in consideration of the in-device coexistence interference and the strength of the in-device coexistence interference.

As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the strength of the in-device coexistence interference.

As another example, the measurement report message may include both the result of performing the measurement in consideration of in-device coexistence interference, and the strength and activity of the in-device coexistence interference.

As another example, the measurement report message may include both the result of performing the measurement except the in-device coexistence interference, and the strength and activity of the in-device coexistence interference.

Subsequently, in step S1825, the terminal receives the RRC connection reconfiguration message and receives the in-device coexistence interference control operation determined by the base station (S1830). Based on this, the ICO operation is performed at the base station or the terminal.

For example, when the determined in-device coexistence interference control operation is an FDM operation, the secondary serving cell may be changed through a serving cell management operation (for example, deletion of a secondary serving cell in question). Alternatively, a handover procedure for changing the primary serving cell may be initiated.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, a specific DRX pattern may be transmitted through the RRC connection reconfiguration message.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, an indicator indicating that the DRX pattern is caused by in-device coexistence interference together with a specific DRX pattern may be transmitted through the RRC connection reconfiguration message. The measurement performed by the terminal according to the indication of the indicator may be changed differently from the measurement in step S1525.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, HARQ retransmission in the LTE band may be rejected for handling of beacons while transmitting a signal in the ISM band. That is, the start of the in-device coexistence interference control operation may be instructed through IDC indication information.

Following step S1830, the terminal performs IDC resolution triggering (S1835). For example, when the terminal receives the IDC triggering release threshold through the RRC connection reconfiguration message, IDC release triggering may be performed based on the IDC triggering release threshold.

As another example, when the terminal does not receive the IDC triggering cancellation threshold, IDC cancellation triggering may be performed according to an internal terminal (for example, terminal internal adjustment).

As another example, when the terminal does not receive the IDC triggering release threshold, IDC release triggering may be performed based on a preset reference value. The preset reference value is a preset value in the system. In this case, the preset reference value may be an RSRP value or an RSRQ value. That is, IDC resolution triggering is performed when the measured RSRP or RSRQ value is larger than the preset reference value. Alternatively, the preset reference value may be an intensity related value of in-device coexistence interference. That is, IDC resolution triggering is performed when the measured strength of in-device coexistence interference is greater than a preset reference value. Alternatively, the preset reference value may be a value considering both strength and activity of coexistence interference in the device. That is, when the measured intensity of in-device coexistence interference is greater than the preset reference value, and the activity of the measured in-device coexistence interference is greater than the preset reference value, IDC resolution triggering is performed.

Meanwhile, the IDC resolution triggering may be performed only in the serving cell. Alternatively, the IDC resolution triggering may be performed for all cells of a frequency band in which in-device coexistence interference problem occurs seriously.

After the step S1835, the terminal transmits the IDC indication information to the base station and performs the IDC indication operation again (S1840).

For example, the IDC indication information may include a separate IDC resolution indicator indicating whether to trigger the IDC resolution. The IDC resolution indicator may be a bitmap indicator. For example, when the indicator is 0, IDC release triggering is not performed. When the indicator is 1, IDC release triggering is performed.

If IDC entry triggering has been previously performed for a plurality of operating bands (or frequency bands), the base station may know that the IDC cancellation triggering is performed only for a specific operating band (or frequency band) indicated by the IDC cancellation indicator. have. That is, in the operating band (or frequency band) in which IDC cancellation triggering is not performed, the state in which IDC entry triggering is performed is maintained.

The IDC entry indicator may be set in connection with the IDC resolution indicator.

For example, when the IDC entry indicator is 1, it may indicate that IDC entry has been performed, and when the IDC release indicator is 0, it may indicate that IDC entry is resolved. Alternatively, when the IDC entry indicator is 0, it may indicate that IDC entry has been performed, and when the IDC release indicator is 1, it may indicate that IDC entry is resolved. That is, the terminal may transmit the IDC indication / release to the base station through the 1-bit indicator.

This indicator may be set according to a predetermined appointment of the network and the terminal.

Also, the indicator indicating the IDC entry indication / release may be set to a bit longer than the 1 bit.

As another example, the IDC indication information may include unusable frequency band information or TDM pattern information. In this case, the IDC indication information does not need to include a separate IDC resolution indicator, the base station implicitly determines the situation of in-device co-existence interference, such as whether or not IDC cancellation triggering through the change in the unusable frequency band information Because you can.

In this case, the unusable frequency band information may be indicated through EARFCN.

For example, the IDC indication information may include all EARFCN values of the unusable frequency band, or may include EARFCN corresponding to a boundary value (maximum boundary value or minimum boundary value) of the unusable frequency band.

In this case, whether the EARFCN included in the IDC indication information is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard. Alternatively, an indicator (boundary type indicator) indicating whether the EARFCN is the maximum boundary value or the minimum boundary value may be further included in the IDC indication information. The base station may determine the unusable frequency band based on the EARFCN and the boundary type indicator. Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN included in the IDC indication information belongs.

As another example, the EARFCN included in the IDC indication information may indicate that an operating band region including the EARFCN is an unusable frequency band. That is, the EARFCN may be used to indicate an operation band unit. As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the base station may determine that all of the plurality of operating bands are unavailable bands.

The TDM pattern information may include at least one of a DRX cycle, a DRX operation interval, and a DRX subframe offset.

The IDC indication information may include one piece of the unusable frequency band information and one piece of TDM pattern information, or may include a plurality of pieces of unusable frequency band information and a plurality of TDM pattern information. If the IDC indication information includes a plurality of unusable frequency band information and a plurality of TDM pattern information, the unusable frequency band information and the TDM pattern information may be transmitted in pairs.

Subsequently to step S1840, the terminal receives an RRC connection reset message from the base station again (S1845). The RRC connection reset message includes measurement setting information for setting a measurement to be performed by the terminal.

The measurement setting information may include IDC measurement indication information indicating that measurement related to in-device coexistence interference is performed, and when the measurement setting information includes IDC measurement indication information, only the measurement gap for the unusable frequency band may be used. The information may be set to limit the ISM transmission. The IDC measurement indication information is measured by the terminal for the unusable frequency band in consideration of in-device coexistence interference, measurement except in-device coexistence interference, measurement in consideration of in-device coexistence interference and measurement except in-device coexistence interference. Can be instructed to perform both. In addition, the IDC measurement indication information, the terminal measures the strength of the in-device coexistence interference for the unusable frequency band, the measurement considering the in-device coexistence interference based on the strength of the in-device coexistence interference (or in consideration of the in-device coexistence interference Not measured). In addition, the IDC measurement indication information is a measurement in which the terminal measures the strength and activity of the in-device coexistence interference for the unusable frequency band, and considers the in-device coexistence interference based on the strength and activity of the in-device coexistence interference (or Measurement without taking into account in-device co-existence interference).

As another example, the measurement setting information may include a measurement limit pattern as well as IDC measurement indication information. In this case, the measurement restriction pattern may be in the form of a DRX pattern or in the form of a bitmap pattern. The IDC measurement indication information may be represented by a report IDC quantity, wherein the report IDC quantity may include a TDM pattern, an unusable frequency band, or an additional measurement result (eg, in a device). Additional reports on measurements with coexistence interference). The report IDC quantity may be a bitmap indicator. The report IDC quantity may be included in the measurement configuration information entity of the RRC connection reset message.

Meanwhile, the measurement configuration information may include information on at least one change of a DRX cycle, a DRX operation interval, or a DRX subframe offset, or may include information for releasing the measurement limitation when there is a measurement limitation.

Following step S1845, the terminal does not consider in-device coexistence interference in a serving cell or neighbor cell in which the in-device coexistence interference exists in a serving cell or a neighbor cell in which there is in-device coexistence interference or in-device coexistence interference does not exist. The measurement is performed again according to a rule for obtaining a measurement sample, and the updated measurement result report information is transmitted to the base station (S1850). The unusable frequency band information is information updated after the previously performed in-device coexistence interference control operation, and the measurement report information may further include a resolution report for reporting that the progress of in-device coexistence interference has ended for the unusable frequency band. Can be.

For example, the measurement report message may include a result of performing measurement excluding coexistence interference in the device. As another example, the measurement report message may include a result of performing a measurement considering in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the result of the measurement in consideration of the in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement in consideration of the in-device coexistence interference and the strength of the in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the strength of the in-device coexistence interference. As another example, the measurement report message may include both the result of performing the measurement in consideration of in-device coexistence interference, and the strength and activity of the in-device coexistence interference. As another example, the measurement report message may include both the result of performing the measurement except the in-device coexistence interference, and the strength and activity of the in-device coexistence interference. In this case, the entity performing the measurement (eg, the terminal) may be one entity, and the entity performing the measurement may be a plurality.

Subsequent to step S1850, when the in-device co-existence interference control operation is further required (S1855), if the base station selects the most suitable in-device co-existence interference control method based on the updated measurement result, the terminal sends an RRC connection reconfiguration message to the base station. Receive from (S1830), perform IDC cancellation triggering (S1835), and re-indicate IDC.

If no in-device coexistence interference control operation is required (S1855), the in-device coexistence interference control operation of the terminal is terminated.

19 is a flowchart illustrating the operation of a base station for controlling in-device coexistence interference in accordance with the present invention.

Referring to FIG. 19, the base station receives performance information of the terminal from the terminal (S1900).

The performance information of the terminal may include information on the possibility of in-device coexistence interference (frequency bands in which there may be in-device coexistence interference, frequency bands in which there is no possibility of in-device coexistence interference, or frequency bands in which potential in-device coexistence interference exists). ) May be included.

The frequency band in which the in-device coexistence interference may exist may be indicated using EARFCN. For example, the performance information of the terminal includes all EARFCN values of the frequency band in which the in-device coexistence interference may exist, or the boundary value (maximum boundary value or the minimum of frequency bands in which the in-device coexistence interference may exist). EARFCN corresponding to a boundary value). In this case, an indicator indicating whether the EARFCN included in the performance information of the terminal is the maximum boundary value or the minimum boundary value is determined in advance through the 3GPP LTE standard or whether the EARFCN is the maximum boundary value or the minimum boundary value (boundary type). Indicator) may be further included in the performance information of the terminal. Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN included in the performance information of the terminal belongs. As another example, the performance information of the terminal includes the EARFCN, the EARFCN may indicate that there is a possibility that there is an in-device coexistence interference in the operating band region itself where the EARFCN is located. As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the base station may determine that there is a possibility of in-device coexistence interference in all of the plurality of operating bands.

In addition, the performance information of the terminal may include type information or type information of another communication system that may cause in-device coexistence interference. In addition, the performance information of the terminal may include frequency band information that may generate in-device coexistence interference in the other communication system together with type information or type information of another communication system that may generate in-device coexistence interference. .

In addition, the performance information of the terminal may include an ICO performance indicator. If the ICO performance indicator indicates that the terminal is incapable of controlling in-device coexistence interference, the base station may determine that it is unnecessary to transmit information related to the in-device coexistence interference control to the terminal. As an example, the ICO performance indicator is a bitmap indicator.

Following step S1900, the base station transmits an RRC connection reconfiguration message to the terminal (S1905). The RRC connection reset message includes information for setting an IDC indication operation.

For example, the RRC connection reset message includes an IDC triggering threshold. The IDC triggering threshold is an IDC triggering entry threshold or an IDC triggering cancellation threshold. The IDC triggering threshold may be determined based on RSRP value, based on RSRQ value, based on strength of in-device coexistence interference, or may be determined in consideration of strength and activity of in-device coexistence interference at the same time. In addition, the IDC triggering threshold may be set differently for each frequency band or operating band.

On the other hand, the base station may receive a confirmation for receiving the RRC connection reset message by receiving the RRC reset completion message from the terminal (not shown).

Subsequently to step S1905, the base station receives information related to in-device coexistence interference from the terminal through IDC indication information (S1910).

The IDC indication information may include a separate IDC entry indicator indicating whether to trigger the IDC entry. The IDC entry indicator may be a bitmap indicator.

The IDC indication information may include unavailable frequency band information or TDM pattern information. In this case, even if the IDC indication information does not include a separate IDC entry indicator, the base station may implicitly determine the situation of in-device coexistence interference such as whether IDC entry triggering is performed through the unusable frequency band information.

The unusable frequency band information may be indicated through EARFCN.

For example, the IDC indication information may include all EARFCN values of the unusable frequency band, or may include EARFCN corresponding to a boundary value (maximum boundary value or minimum boundary value) of the unusable frequency band. In this case, whether the EARFCN included in the IDC indication information is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard, or the boundary type indicator may be further included in the IDC indication information. Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN included in the IDC indication information belongs. As another example, the IDC indication information includes an EARFCN. The EARFCN may indicate that an operating band region including the EARFCN is an unusable frequency band. As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the base station may determine that all of the plurality of operating bands are unavailable bands.

The TDM pattern information may include at least one of a DRX cycle, a DRX operation interval, and a DRX subframe offset.

The IDC indication information may include one piece of unusable frequency band information and one piece of TDM pattern information, or may include a plurality of pieces of unusable frequency band information and a plurality of TDM pattern information. If the IDC indication information includes a plurality of unusable frequency band information and a plurality of TDM pattern information, the unusable frequency band information and the TDM pattern information may be transmitted in pairs.

Following step S1910, the base station transmits an RRC connection reconfiguration message to the terminal (S1915). The RRC connection reset message includes measurement setting information for setting a measurement to be performed by the terminal.

As an example, the measurement setting information includes IDC measurement indication information. In this case, the information may be set to limit ISM transmission only in the measurement gap for the unusable frequency band.

In addition, the IDC measurement indication information instructs the terminal to perform the measurement in consideration of the in-device coexistence interference for the unusable frequency band, or indicates to perform the measurement except the in-device coexistence interference, or the measurement and the device in consideration of the coexistence interference in the device It can be indicated that all measurements except coexistence interference are performed.

In addition, the IDC measurement indication information, the terminal first measures the strength of the in-device coexistence interference for the unusable frequency band, and based on the strength of the in-device coexistence interference, the measurement or in-device coexistence interference considering the in-device coexistence interference It may indicate that measurements are not taken into account.

The IDC measurement indication information is a measurement in which the terminal first measures the strength and activity of the in-device coexistence interference for the unusable frequency band, and considers the in-device coexistence interference based on the strength and activity of the in-device coexistence interference. Alternatively, it may be indicated to perform a measurement that does not consider in-device coexistence interference.

As another example, the measurement setting information may include a measurement limit pattern as well as IDC measurement indication information. In this case, the measurement restriction pattern may be in the form of a DRX pattern or in the form of a bitmap pattern.

Subsequently to step S1915, the base station receives a result of the measurement by the terminal (S1920). The measurement result report may be received through a measurement report message. For example, the measurement result report information may be included in the measurement result information entity in the measurement report message and transmitted.

The measurement report message may include a result of performing measurement excluding in-device coexistence interference. This is a result of the measurement performed by the terminal using a measurement sample that does not include in-device coexistence interference.

As another example, the measurement report message may include a result of performing a measurement considering in-device coexistence interference. The UE performs the measurement by using the measurement sample including the in-device coexistence interference.

As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the result of the measurement in consideration of the in-device coexistence interference. This is a result of the measurement performed by the terminal using both a measurement sample including in-device coexistence interference and a measurement sample not including in-device coexistence interference.

As another example, the measurement report message may include both the result of the measurement in consideration of the in-device coexistence interference and the strength of the in-device coexistence interference.

As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the strength of the in-device coexistence interference.

As another example, the measurement report message may include both the result of performing the measurement in consideration of in-device coexistence interference, and the strength and activity of the in-device coexistence interference.

As another example, the measurement report message may include both the result of performing the measurement except the in-device coexistence interference, and the strength and activity of the in-device coexistence interference.

Following step S1920, the base station determines the most suitable in-device coexistence interference control method based on the measurement report information (S1925).

In this case, the in-device coexistence interference control method may be an FDM operation or a TDM operation. The FDM operation or the TDM operation may be an operation according to FIGS. 5 to 13.

For example, when a problem occurs in a frequency band provided by a base station, if the available frequency band according to the measurement result report information does not cause a problem due to load balancing and does not have a significant influence on handover (eg For example, when the RSRP or RSRQ value of the corresponding frequency band is sufficiently large), the ICO may be determined to perform the FDM operation, and otherwise, perform the TDM operation in the serving cell.

Following step S1925, the base station transmits the in-device coexistence interference control operation determined through the RRC connection reconfiguration message to the terminal (S1930). Based on this, the ICO operation is performed at the base station or the terminal.

For example, when the determined in-device coexistence interference control operation is an FDM operation, the secondary serving cell may be changed through a serving cell management operation (for example, deletion of a secondary serving cell in question). Alternatively, a handover procedure for changing the primary serving cell may be initiated.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, a specific DRX pattern may be transmitted through the RRC connection reconfiguration message.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, an indicator indicating that the DRX pattern is caused by in-device coexistence interference together with a specific DRX pattern may be transmitted through the RRC connection reconfiguration message. The measurement performed by the terminal according to the indication of the indicator may be changed differently from the measurement in step S1525.

As another example, when the determined in-device coexistence interference control operation is a TDM operation, HARQ retransmission in the LTE band may be rejected for handling of beacons while transmitting a signal in the ISM band. That is, the start of the in-device coexistence interference control operation may be instructed through IDC indication information.

Following step S1930, the base station re-receives IDC indication information from the terminal (S1935).

For example, the IDC indication information may include a separate IDC resolution indicator indicating whether to trigger the IDC resolution. The IDC resolution indicator may be a bitmap indicator. For example, when the indicator is 0, IDC release triggering is not performed. When the indicator is 1, IDC release triggering is performed.

If IDC entry triggering has been previously performed for a plurality of operating bands (or frequency bands), the base station may know that the IDC cancellation triggering is performed only for a specific operating band (or frequency band) indicated by the IDC cancellation indicator. have. That is, in the operating band (or frequency band) in which IDC cancellation triggering is not performed, the state in which IDC entry triggering is performed is maintained.

The IDC entry indicator may be set in connection with the IDC resolution indicator.

For example, when the IDC entry indicator is 1, it may indicate that IDC entry has been performed, and when the IDC release indicator is 0, it may indicate that IDC entry is resolved. Alternatively, when the IDC entry indicator is 0, it may indicate that IDC entry has been performed, and when the IDC release indicator is 1, it may indicate that IDC entry is resolved. That is, the terminal may transmit the IDC indication / release to the base station through the 1-bit indicator.

This indicator may be set according to a predetermined appointment of the network and the terminal.

Also, the indicator indicating the IDC entry indication / release may be set to a bit longer than the 1 bit.

As another example, the IDC indication information may include unusable frequency band information or TDM pattern information. In this case, even if the IDC indication information does not include a separate IDC resolution indicator, the base station may implicitly determine a situation of in-device coexistence interference such as whether to trigger IDC resolution through whether the unusable frequency band information is changed. Can be. That is, the base station may implicitly determine that the IDC resolution triggering is performed when the frequency band included in the unavailable frequency band is changed to not included in the unavailable frequency band.

In this case, the unusable frequency band information may be indicated through EARFCN.

For example, the IDC indication information may include all EARFCN values of the unusable frequency band, or may include EARFCN corresponding to a boundary value (maximum boundary value or minimum boundary value) of the unusable frequency band. That is, when the IDC indication information includes the EARFCN corresponding to the minimum threshold value, the base station may determine that the terminal cannot use a frequency band larger than the minimum threshold value. In addition, when the IDC indication information includes the EARFCN corresponding to the maximum threshold value, the base station may determine that the terminal cannot use a frequency band larger than the minimum threshold value.

In this case, whether the EARFCN included in the IDC indication information is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard. Alternatively, an indicator (boundary type indicator) indicating whether the EARFCN is the maximum boundary value or the minimum boundary value may be further included in the IDC indication information. The base station may determine the unusable frequency band based on the EARFCN and the boundary type indicator. Alternatively, the type of the boundary value may be implicitly determined based on the number of operating bands to which the EARFCN included in the IDC indication information belongs.

As another example, the EARFCN included in the IDC indication information may indicate that an operating band region including the EARFCN is an unusable frequency band. That is, the EARFCN may be used to indicate an operation band unit.

As another example, when there are a plurality of operating bands affected by the frequency band indicated by the EARFCN, the base station may determine that all of the plurality of operating bands are unavailable bands.

The TDM pattern information may include at least one of a DRX cycle, a DRX operation interval, and a DRX subframe offset.

The IDC indication information may include one piece of the unusable frequency band information and one piece of TDM pattern information, or may include a plurality of pieces of unusable frequency band information and a plurality of TDM pattern information. If the IDC indication information includes a plurality of unusable frequency band information and a plurality of TDM pattern information, the unusable frequency band information and the TDM pattern information may be transmitted in pairs.

Following step S1935, the base station transmits an RRC connection reconfiguration message back to the terminal (S1940). The RRC connection reset message includes measurement setting information for setting a measurement to be performed by the terminal.

The measurement setting information may include IDC measurement indication information indicating that measurement related to in-device coexistence interference is performed, and when the measurement setting information includes IDC measurement indication information, only the measurement gap for the unusable frequency band may be used. The information may be set to limit the ISM transmission. The IDC measurement indication information is measured by the terminal for the unusable frequency band in consideration of in-device coexistence interference, measurement except in-device coexistence interference, measurement in consideration of in-device coexistence interference and measurement except in-device coexistence interference. Can be instructed to perform both. In addition, the IDC measurement indication information, the terminal measures the strength of the in-device coexistence interference for the unusable frequency band, the measurement considering the in-device coexistence interference based on the strength of the in-device coexistence interference (or in consideration of the in-device coexistence interference Not measured). In addition, the IDC measurement indication information is a measurement in which the terminal measures the strength and activity of the in-device coexistence interference for the unusable frequency band, and considers the in-device coexistence interference based on the strength and activity of the in-device coexistence interference (or Measurement without taking into account in-device co-existence interference).

As another example, the measurement setting information may include a measurement limit pattern as well as IDC measurement indication information. In this case, the measurement restriction pattern may be in the form of a DRX pattern or in the form of a bitmap pattern. The IDC measurement indication information may be represented by a report IDC quantity, wherein the report IDC quantity may include a TDM pattern, an unusable frequency band, or an additional measurement result (eg, in a device). Additional reports on measurements with coexistence interference). The report IDC quantity may be a bitmap indicator.

Meanwhile, the measurement configuration information may include information on at least one change of a DRX cycle, a DRX operation interval, or a DRX subframe offset, or may include information for releasing the measurement limitation when there is a measurement limitation.

Subsequently to step S1940, the base station again performs the measurement in consideration of the in-device coexistence interference or the measurement except the in-device coexistence interference in accordance with the rules for obtaining a measurement sample to receive the updated measurement result report information from the terminal (S1945). . The unusable frequency band information is information updated after the previously performed in-device coexistence interference control operation, and the measurement report information may further include a resolution report for reporting that the progress of in-device coexistence interference has ended for the unusable frequency band. Can be.

For example, the measurement report message may include a result of performing measurement excluding coexistence interference in the device. As another example, the measurement report message may include a result of performing a measurement considering in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the result of the measurement in consideration of the in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement in consideration of the in-device coexistence interference and the strength of the in-device coexistence interference. As another example, the measurement report message may include both the result of the measurement excluding the in-device coexistence interference and the strength of the in-device coexistence interference. As another example, the measurement report message may include both the result of performing the measurement in consideration of in-device coexistence interference, and the strength and activity of the in-device coexistence interference. As another example, the measurement report message may include both the result of performing the measurement except the in-device coexistence interference, and the strength and activity of the in-device coexistence interference. In this case, the entity performing the measurement (eg, the terminal) may be one entity, and the entity performing the measurement may be a plurality.

Subsequent to step S1945, if further in-device coexistence interference control operation is required (S1950), the base station selects the most suitable in-device coexistence interference control method based on the updated measurement result (S1925), and resets the RRC connection to the terminal. The message is transmitted again (S1930).

If no in-device coexistence interference control operation is required (S1950), the in-device coexistence interference control operation of the base station is terminated.

20 is a block diagram illustrating an apparatus for transmitting and receiving information about in-device coexistence interference according to an embodiment of the present invention.

Referring to FIG. 20, the terminal 2000 and the base station 2050 exchange information on in-device coexistence interference.

The terminal 2000 includes an interference detector 2005, a measurement result report information generator 2010, a transmitter 2015, and a receiver 2020.

The interference detector 2005 detects occurrence of in-device coexistence interference. For example, when the terminal 2000 transmits a signal y through another RF such as WiFi while receiving the signal x from the base station 2050 through the LTE RF, it detects the occurrence of in-device coexistence interference.

The interference detector 2005 includes a measurement unit 2006 and a triggering unit 2007.

The measurement unit 2006 performs the measurement considering the coexistence interference in the device and the measurement excluding the coexistence interference in the device. The measurement is performed by using each measurement sample by distinguishing between the part affected by in-device coexistence interference and the part not affected by in-device coexistence interference.

The triggering unit 2007 may perform triggering (IDC entry triggering or IDC release triggering) based on the RRC connection reconfiguration message (IDC indication configuration information) received from the base station. For example, the triggering unit 2007 performs IDC entry triggering based on the IDC triggering entry threshold value when the terminal receives an IDC triggering entry threshold value through the RRC connection reconfiguration message. As another example, if the terminal does not receive the IDC triggering entry threshold value, the triggering unit 2007 performs IDC entry triggering by a terminal internal criterion (for example, terminal internal adjustment), or based on a preset reference value. Ingress triggering may be performed. In this case, the preset reference value may be an RSRP value or an RSRQ value, a value related to the strength of in-device coexistence interference, or a value in consideration of both the strength and activity of the in-device coexistence interference. Meanwhile, the IDC entry triggering may be performed only in a serving cell or for all cells in a frequency band in which in-device coexistence interference problem occurs seriously.

The measurement result report information generation unit 2010 generates measurement result report information. When the measurement result is updated, the updated measurement result report information is generated. The measurement result report information includes a result of performing a measurement excluding coexistence interference in the device, a result of performing a measurement in consideration of coexistence interference in the device, or a result of performing a measurement except in-device coexistence interference and in-device It may include all the results of measurements taken in consideration of coexistence interference. In addition, the measurement result report information includes both the result of the measurement in consideration of the in-device coexistence interference and the strength of the in-device coexistence interference, or the result of the measurement except the in-device coexistence interference and the intensity of the coexistence interference in the device The result of performing all the measurements in consideration of the in-device coexistence interference and the strength and activity of the coexistence interference in the device or the result of the measurement except the in-device coexistence interference and the strength and activity of the coexistence interference in the device It can contain everything.

The transmission unit 2015 transmits the performance information of the terminal to the base station. The performance information of the terminal may include information on the possibility of in-device coexistence interference (frequency bands in which there may be in-device coexistence interference, frequency bands in which there is no possibility of in-device coexistence interference, or frequency bands in which potential in-device coexistence interference exists). ) May be included. The frequency band in which the in-device coexistence interference may exist may be indicated using EARFCN. The performance information of the terminal may include type information or type information of another communication system that may generate in-device coexistence interference, and may include frequency band information that may generate in-device coexistence interference in the other communication system. It may further include. In addition, the performance information of the terminal may include an ICO performance indicator indicating whether the terminal has the ability to perform in-device coexistence interference control.

The transmitter 2015 transmits IDC indication information to the base station 2050. The IDC indication information may include a separate IDC entry indicator indicating whether to trigger the IDC entry. Alternatively, the IDC indication information may include unavailable frequency band information or TDM pattern information. The unusable frequency band information may be indicated through EARFCN, wherein the IDC indication information includes all EARFCN values of the unusable frequency band, or the boundary value (maximum boundary value or minimum boundary value) of the unusable frequency band. It may include the EARFCN corresponding to. In this case, whether the EARFCN included in the IDC indication information is the maximum boundary value or the minimum boundary value may be determined in advance through the 3GPP LTE standard, or the boundary type indicator may be further included in the IDC indication information. The TDM pattern information may include at least one of a DRX cycle, a DRX operation interval, and a DRX subframe offset. The IDC indication information may include one of the unusable frequency band information and the TDM pattern information, respectively, or may include a plurality of the unusable frequency band information and the plurality of TDM pattern information, and the unusable frequency band information and the TDM pattern information may include Can be sent in pairs.

The transmission unit 2015 includes the measurement result report information in the measurement result information entity in the measurement report message and transmits it. When the measurement result report information is updated, the transmission unit 2015 transmits the updated measurement result report information to the base station 2050 again.

The receiver 2020 receives IDC indication configuration information from the base station 2050 through an RRC connection reconfiguration message. The IDC instruction setting information is information for setting the IDC instruction operation. For example, the RRC connection reset message includes an IDC triggering threshold (IDC triggering entry threshold or IDC triggering cancellation threshold). The IDC triggering threshold may be determined based on RSRP value, based on RSRQ value, based on strength of in-device coexistence interference, or may be determined in consideration of strength and activity of in-device coexistence interference at the same time. In addition, the IDC triggering threshold may be set differently for each frequency band or operating band.

The receiver 2020 receives measurement setting information from the base station 2050 through an RRC connection reconfiguration message. The measurement setting information includes IDC measurement indication information. The measurement setting information may be information configured to limit ISM transmission only in a measurement gap for an unusable frequency band. In addition, the IDC measurement indication information instructs the terminal to perform the measurement in consideration of the in-device coexistence interference for the unusable frequency band, or indicates to perform the measurement except the in-device coexistence interference, or the measurement and the device in consideration of the coexistence interference in the device It can be indicated that all measurements except coexistence interference are performed. In addition, the IDC measurement indication information, the terminal first measures the strength of the in-device coexistence interference for the unusable frequency band, and based on the strength of the in-device coexistence interference, the measurement or in-device coexistence interference considering the in-device coexistence interference It may indicate that measurements are not taken into account. The IDC measurement indication information is a measurement in which the terminal first measures the strength and activity of the in-device coexistence interference for the unusable frequency band, and considers the in-device coexistence interference based on the strength and activity of the in-device coexistence interference. Alternatively, it may be indicated to perform a measurement that does not consider in-device coexistence interference. As another example, the measurement setting information may include a measurement limit pattern as well as IDC measurement indication information. In this case, the measurement restriction pattern may be in the form of a DRX pattern or in the form of a bitmap pattern. Meanwhile, the IDC measurement indication information may be expressed as a report IDC quantity.

The receiver 2020 receives an RRC connection reconfiguration message including an in-device coexistence interference control operation determined by the base station 2050 from the base station 2050.

The base station 2050 includes a receiver 2055, an interference control determiner 2060, a transmitter 2065, and a scheduler 2070.

The receiver 2055 receives performance information of the terminal from the terminal 2000. The performance information of the terminal may include information on the possibility of in-device coexistence interference (frequency bands in which there may be in-device coexistence interference, frequency bands in which there is no possibility of in-device coexistence interference, or potential in-device coexistence interference present. Band).

The receiver 2055 receives IDC indication information from the terminal 2000. The IDC indication information may include a separate IDC entry indicator indicating whether to trigger the IDC entry. The IDC indication information may include unavailable frequency band information or TDM pattern information. The unusable frequency band information may be indicated through EARFCN. The TDM pattern information may include at least one of a DRX cycle, a DRX operation interval, and a DRX subframe offset.

The receiving unit 2055 receives the result of the base station performing the measurement. The measurement result report may be received through a measurement report message. For example, the measurement result report information may be included in the measurement result information entity in the measurement report message and transmitted.

The interference control determiner 2060 determines an in-device coexistence interference control operation based on the measurement report information received from the terminal 2000. The in-device coexistence interference control operation may be an FDM operation or a TDM operation. In addition, the FDM operation or the TDM operation may be an operation according to FIGS. 5 to 13.

The transmitter 2065 transmits an RRC connection reconfiguration message including the IDC indication setting information for setting the IDC indication operation of the terminal 2000 to the terminal 2000. The RRC connection reset message includes an IDC triggering threshold.

The transmitter 2065 transmits to the terminal 2000 an RRC connection reconfiguration message including measurement setting information for setting the measurement of the terminal 2000.

The transmitter 2065 transmits the in-device coexistence interference control operation determined by the interference control determiner 2060 to the terminal 2000.

The scheduling unit 2070 performs the in-device coexistence interference control operation in the FDM operation or the TDM operation according to the determination of the interference control determination unit 2060. The FDM operation may be performed through RRC connection reconfiguration. The TDM operation may indicate a TDM pattern or may be performed through DRX resetting.

The base station 2050 may further include a measurement setting information generation unit (not displayed) for generating measurement setting information for setting measurement performed by the terminal.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes 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.

Claims (18)

In a method of controlling a terminal in-device coexistence interference (IDC) in a wireless communication system,
Transmitting performance information of the terminal including information on the possibility of IDC or information on a frequency band in which IDC may exist, to the base station;
Receiving from the base station IDC indication configuration information including an IDC triggering threshold used as a condition of IDC entry triggering to trigger an IDC event indicating that an IDC ongoing state has begun;
Performing the IDC entry triggering based on the IDC triggering threshold;
Transmitting IDC indication information including a result of performing the IDC entry triggering to the base station; And
And receiving, from the base station, measurement setting information for setting the terminal to perform measurement related to IDC. The method of claim 1,
The performance information of the terminal is a frequency where the IDC may exist using the E-UTRA Absolute Radio Frequency Channel Number (EARFCN), which is assigned by dividing and numbering an operable frequency band of E-UTRA (Evolved-Universal Terrestrial Radio Access). In-device coexistence interference control method comprising the information on the band. 3. The method of claim 2,
In-device coexistence interference control method characterized in that the performance information of the terminal includes all EARFCN corresponding to a frequency band in which the IDC may exist. 3. The method of claim 2,
In-device coexistence interference control method characterized in that the performance information of the terminal includes an EARFCN corresponding to the boundary value of the frequency band in which the IDC may exist. The method of claim 4, wherein
The capability information of the terminal further comprises a boundary type indicator for indicating whether the EARFCN is the maximum boundary value or the minimum boundary value of the frequency band in which the IDC may exist. The method of claim 1,
The capability information of the terminal further includes the type information or type information of the communication system capable of generating IDC in-device coexistence interference control method. The method of claim 1,
The IDC triggering threshold is determined based on RSRP (Reference Signal Received Power) or RSRQ (Reference Signal Received Quality). The method of claim 1,
The IDC triggering threshold value is determined based on the activity of the IDC interference or the intensity of the IDC interference, which is the ratio of the interval in which the IDC occurs within a predetermined interval in the device. The method of claim 1,
The IDC triggering threshold value is determined differently for each frequency band in-device coexistence interference control method. The method of claim 1,
The IDC entry triggering is performed on the basis of a preset reference value in the system of the terminal in-device coexistence interference control method. The method of claim 1,
And the IDC indication information includes an IDC entry indicator indicating whether to perform IDC entry triggering. The method of claim 1,
And the IDC indication information includes unavailable frequency band information and time division multiplexing (TDM) pattern information. The method of claim 1,
The measurement setting information is configured to measure the strength of the IDC interference for the unusable frequency band, and to perform the measurement considering the IDC or the measurement except for the IDC based on the strength of the IDC interference, in-device coexistence interference control Way. The method of claim 1,
The measurement setting information is configured to measure the activity of the IDC interference for the unusable frequency band, and to perform the measurement considering the IDC or the measurement except for the IDC based on the activity of the IDC interference, the in-device coexistence interference control Way. The method of claim 1,
The measurement setting information further includes a measurement limit pattern,
The measurement restriction pattern is a DRX (Discontinuous Reception) pattern or a bitmap pattern in-device coexistence interference control method. A method for controlling in-device coexistence interference (IDC) in a base station in a wireless communication system,
Receiving performance information of a terminal from the terminal, wherein the terminal includes performance information of a terminal including information on the possibility of IDC or information on a frequency band in which IDC may exist;
Transmitting IDC indication configuration information including an IDC triggering threshold used as a condition of IDC entry triggering to trigger an IDC event indicating that an IDC is in progress;
Receiving IDC indication information including a result of performing the IDC entry triggering from the terminal; And
And transmitting, to the terminal, measurement setting information for setting the terminal to perform measurement related to IDC based on the IDC indication information. In a terminal for controlling in-device coexistence interference (IDC) in a wireless communication system,
A transmitter for transmitting performance information of a terminal including information on the possibility of IDC or information on a frequency band in which IDC may exist;
A receiving unit for receiving from the base station IDC indication setting information including an IDC triggering threshold value used as a condition of IDC entry triggering to trigger an IDC event indicating that an IDC is in progress; And
A triggering unit configured to perform the IDC entry triggering based on the IDC triggering threshold;
The transmission unit transmits IDC indication information including the result of performing the IDC entry triggering to the base station,
The receiver, characterized in that for receiving the measurement setting information from the base station for setting the terminal to perform the measurement related to IDC. A base station for controlling in-device coexistence interference (IDC) in a wireless communication system,
A receiving unit which receives performance information of a terminal including information on a possibility of IDC or information on a frequency band in which IDC may exist, from the terminal; And
And a transmitter for transmitting IDC indication configuration information including an IDC triggering threshold used as a condition of IDC entry triggering to trigger an IDC event indicating that an IDC is in progress.
The receiving unit receives IDC indication information including a result of performing the IDC entry triggering from the terminal,
And the transmitter transmits measurement setting information for setting the terminal to perform measurement related to IDC based on the IDC indication information to the terminal.

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