DE202015102161U1 - Device for controlling interference between internal things-of-things devices - Google Patents

Abstract

Apparatus for controlling interference between devices in a terminal, the apparatus comprising: a controller configured to select a device that performs interference avoidance between devices capable of performing inter-device communication based on a significance of a service; and a receiving unit configured to receive interference avoidance information required by the selected interference avoiding apparatus, the controller determining an interference avoiding method based on the interference avoiding information.

Description

TECHNICAL AREA

The present disclosure relates to a device for controlling interference between Internet of Things devices.

BACKGROUND

In general, a mobile communication system has been developed for the purpose of providing a communication service with securing a user's mobility. The mobile communication system is in the phase of being able to deliver not only voice communication but also high-speed data communication services, thanks to the rapid progress in the development of techniques. A short-distance communication technique has also made rapid progress, so that a user tends to have various short-distance communication devices in addition to a mobile communication terminal.

Modern communication technology has enabled communication between all things represented as the "Internet of Things (IoT)" as well as inter-user communication. For example, a user may have various types of electronic devices, all of which are interconnected via a mobile communication or short-range communication technique, or various sensors to provide other useful functions to the user or to enable efficient inter-device control. Such electronic devices may generally be referred to as IoT devices.

The IoT devices include a mobile communication module, such as Long Term Evolution (LTE), or a short range communication module, such as Bluetooth, Wireless Fidelity (WiFi), ZigBee, or Near Field Communication (NFC). At this time, there may be a case where frequency bands used by the respective communication modules may be juxtaposed.

SUMMARY

The present disclosure relates to an apparatus for solving a problem of interference between IoT devices (hereinafter also referred to as "inter-IoT device interference").

According to one embodiment of the present disclosure, an apparatus for controlling interference between devices in a terminal is provided. The apparatus includes: a controller configured to select a device that performs interference avoidance between devices capable of performing inter-device communication based on a significance of a service; and a receiving unit configured to receive interference avoidance information needed by the selected interference avoidance device. The controller determines an interference avoidance method based on the interference avoidance information.

In accordance with another embodiment of the present disclosure, an apparatus for preventing interference in a device among devices is provided. The apparatus comprises: a receiving unit configured to receive, from a terminal, a message informing that a device performing an interference avoidance is selected among devices capable of performing an inter-device Communication based on a significance of a service; and a transmission unit configured to transmit interference avoidance information needed for interference avoidance. An interference avoidance method is based on the interference avoidance information.

According to one embodiment of the present disclosure, an apparatus for controlling interference between devices in a terminal is provided. The apparatus comprises: a controller configured to determine that the authority is transmitted to at least one of the devices that perform interference avoidance, and that an indicator for indicating the authority transmission is transmitted to the particular device. The particular device selects a device that performs interference avoidance among devices capable of performing inter-device communication based on a significance of a service, and receives interference avoidance information from the selected device that is for the interference avoidance is needed, and an interference avoiding method is based on the interference avoidance information.

In accordance with another embodiment of the present disclosure, an apparatus for preventing interference in a device among devices is provided. The apparatus comprises: a controller configured to receive an indicator for displaying an authority transmission from a terminal, selecting a device that performs interference avoidance among devices capable of performing inter-device communication, based on a significance of a service, and receiving interference avoidance information from the selected device needed for the interference avoidance. An interference avoidance method is based on the interference avoidance information.

The present invention can solve a problem of inter-IoT device interference.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

1 is a schematic view of the frequency bands next to an ISM band 100 below frequencies currently used for mobile communication in 3GPP;

2 FIG. 14 is a view for describing an example of an inter-IoT device interference scenario in the present disclosure; FIG.

3 FIG. 4 is a conceptual view of a method for preventing inter-IoT device interference in the present disclosure; FIG.

4 FIG. 10 is a flowchart for describing a method for avoiding inter-IoT device interference in the present disclosure; FIG.

5 Fig. 10 is a flow chart for describing a procedure for controlling inter-IoT device interference in a case where a master agent for controlling interference in the present disclosure describes an LTE terminal;

6 Fig. 15 is a view for describing IDC, which is an existing LTE technique;

7 Fig. 12 is a view for describing a procedure in which a terminal supplies information to a base station needed to minimize IDC interference in an existing LTE standard;

8th Fig. 10 is a flow chart for describing a process in which an IoT device authorized to control interference controls interference between the other IoT devices;

9 Fig. 12 is a conceptual view of a procedure in which an authority for controlling interference is transmitted to another IoT device;

10 Fig. 10 is a flow chart for describing a procedure in which an authority for controlling interference is transmitted to another IoT device; and

11 Fig. 10 is a block diagram showing an internal configuration of a terminal.

DETAILED DESCRIPTION

Embodiments will be described in detail with reference to the accompanying drawings. At this time, the same elements will be denoted by the same reference numerals, though they may be illustrated in various drawings. Furthermore, a detailed description of a known function and configuration that may obscure the subject matter of the present invention will be omitted.

Furthermore, terms or words used in the specification and claims should not be interpreted as being merely general or in dictionary meanings, but should be interpreted as meanings and concepts that meet the technical spirit of the present invention. based on the principle that the inventor can accordingly define his / her disclosure with a concept of the terms to describe the disclosure in the best way.

The term "LTE terminal" or "terminal" as used herein means a mobile terminal capable of performing high-speed wireless communication. For example, the LTE terminal or terminal may be a personal digital assistant (PDA) with a communication function, a smartphone, a portable phone, a tablet computer, or a touchcomputer, and is capable of operating on a wide variety of IoT Devices. The terms "LTE Terminal" and "Terminal" will be used interchangeably throughout the specification.

An LTE terminal can operate on an LTE carrier frequency or on an ISM band.

For example, a short distance communication technique described below may include, but is not limited to, Bluetooth, WLAN, ZigBee, or NFC.

1 Figure 13 is a schematic view of the frequency bands in addition to an Industrial Scientific and Medical (ISM) band 100 , below frequencies currently used for mobile communication in 3GPP.

It can be understood that in a case where a mobile communication band is band 40 105 used, an interference phenomenon becomes serious when channel 1 is used as a wireless LAN channel, and in a case where the mobile communication cell band 7 110 is used, the interference phenomenon becomes more serious when channel 13 or channel 14 is used as the wireless LAN channel. When a user has a plurality of IoT devices, the distances between the respective IoT devices are defined, for example, within a human body size, and it is expected that the above-mentioned interference increases. In fact, tests of commercially available products show such interference.

The present disclosure provides an apparatus for transmitting, to an IoT device, the control and regulation of interference between a plurality of other IoT devices, including the one IoT device itself. The IoT device configured for customization of interference, requests itself or other IoT devices to perform an interference avoidance procedure according to a prescribed rule, such as whether or not interference is likely to occur, traffic significance (or priority) of each IoT device, or supremacy of an avoidance procedure. In addition, the interference matching authority may be transmitted to another IoT device according to a prescribed rule.

2 FIG. 14 is a view for describing an example of an inter-IoT device interference scenario in the present disclosure. FIG.

For example, a user has 210 a total of three types of IoT devices. An IoT device is an LTE terminal 215 which is used primarily for a data service, such as web surfing, and voice / video telephony. The other IoT devices are a wireless headset 225 and a smart watch 230 ,

The wireless headset 225 is suitable for wireless reception and playback of music files, using a short-distance communication technique, such as Bluetooth.

The smart watch 230 can perform various functions. The smart watch 230 For example, it may additionally provide schedule management, alarm, sports management, entertainment (eg, music or movie) functions, in addition to a basic function to provide the time information. In addition, the smart watch 230 Body information of the user 210 such as checking the heart rate or blood sugar. At this time, IoT devices can be connected to each other via the short-distance communication technique. As an example, if a music file in the smart watch 230 is saved, the music file can be sent to the wireless headset 225 be transmitted by means of, for example, Bluetooth communication.

The wireless headset 225 gives the received music file to the user 210 again. At this time, the user can 210 Data communication via the LTE terminal 215 to attempt. At this point, the LTE terminal transmits 215 an LTE signal 205 to the base station 200 , The LTE signal 205 can with a bluetooth signal between the wireless headset 225 and the smart watch 230 ( 220 ) interfere. In contrast, the bluetooth signal 235 as an interference source to the LTE signal 205 Act. For this interference, the frequency band should be that of the LTE signal 205 Be used adjacent to the ISM band used for Bluetooth communication, the signals should have a signal strength that causes interference.

3 FIG. 4 is a conceptual view of a method for preventing inter-IoT device interference in the present disclosure. FIG.

A user 310 For example, it contains a total of three types of IoT devices, such as an LTE terminal 315 , a wireless headset 325 and a smart watch 330 , At this time, the LTE terminal serves 315 as a main agent controlling inter-IoT device interference and the other IoT devices 325 and 330 should recognize this fact in advance. In general, a device that is always carried by the user can be chosen as the primary agent that controls interference between the IoT devices owned by the user. An example of the principal broker controlling inter-IoT device interference may be the LTE terminal (smartphone), for example. 315 , or the smart watch 330 be. This is because if the user leaves a master agent device that controls interference and moves away from the master agent device, it is necessary to select a new master controller device among the IoT devices that are in the user's possession , which increases operational complexity such as signaling overhead. As another example, control for inter-IoT device interference within a home may be determined by a master agent device that controls interference between home appliances that are firmly positioned within the home. The present invention is characterized by the fact that interference control information is exchanged between the master agent controlling the interference and the other IoT devices ( 320 ) so that the interference between the LTE terminal and the other IoT devices is controlled.

4 FIG. 10 is a flow chart for describing a method of avoiding inter-IoT device interference in the present disclosure. FIG.

Even though 4 an IoT device, such as an IoT device 405 illustrates a variety of IoT devices can be provided, and the operations in 4 can also be applied to the variety of IoT devices.

Although not in 4 is shown, for example, IoT device 405 that is owned by the user, guided by a process, in the IoT device 405 for the LTE terminal 400 is registered, for example, which is the main intermediary for interference control at the beginning of use. For example, during the registration process, it is possible to set whether the interference control function should be executed in the present disclosure. Detailed descriptions of the registration process will be omitted.

Then it determines in step 410 the IoT device 405 whether an IoT device 405 is switched on or within a range of the LTE terminal 400 is. In step 415 lead the LTE terminal 400 and the IoT device 405 an initial recruitment process. In the initial setup process, the IoT device informs 405 the LTE terminal 400 that a previously registered IoT device is in the on state (or within range), requests device authentication, and asks if the IoT device 405 can perform the interference control function of the present disclosure. Since peripheral IoT devices can come in or out of reach at any time, the IoT device that is responsible for interference control must perform regular monitoring. Typically, short distance communication techniques such as Bluetooth regularly monitor devices that use the same short distance communication. If there is a previously registered device among the found peripheral devices, the short-range communication is activated immediately. In step 420 determines the LTE terminal 400 whether there is a potential for interference between the LTE terminal 400 and the peripherals, or between the peripheral IoT devices. If there is potential for the occurrence of interference, ask in step 425 the LTE terminal 400 the IoT devices (or ask the IoT 405 ) to report information required for interference control. There is a possibility that interference will occur if, for example, the frequency band used by the LTE terminal is adjacent to the ISM band, or if an operating frequency or measurement frequency adjacent to the ISM band is an influence perform the typical LTE operations, such as communication and measurement. Or it is also potential for the occurrence of interference when, for example, short-distance communication between IoT devices can interfere with each other. When an inter-IoT device signal is practically in accordance with the setting of the LTE terminal or data transmission is started by means of a specific wireless technology in step 430 , reports the IoT device 405 Signal information to the LTE terminal 400 in step 435 , Alternatively, the IoT device 405 report the signal information in advance before transmitting the signal. The signal information helps the LTE terminal to determine if interference is practically occurring. The signal information may include, for example, a Bluetooth signal pattern of the start time (ie, shift), an absolute time, a transmission power, and a significance (or priority) of the traffic. Alternatively, if the IoT device is the LTE terminal 400 about performing a send / receive operation in step 440 informed, the LTE terminal can 400 Monitor the signal from the IoT device directly to collect required information. Or the two methods described above can be performed. Based on the information, the LTE terminal determines 400 whether interference is practically in step 445 and if it determines that the interference is occurring, the LTE terminal will terminate 400 a suitable interference avoidance method in step 450 , The LTE terminal 400 chooses at least one method among the interference avoidance methods as described below, and tries to avoid the interference.

1. Avoidance by resetting the LTE signal

If interference occurs between the LTE signal and Bluetooth (or WLAN), the LTE signal may be reset so as to prevent the LTE signal and Bluetooth from interfering with each other, or to reduce the interference. For this method, there are a frequency division multiplexing (FDM) method and a time division multiplexing (TDM) method.

The FDM method refers to a method that shifts a serving LTE frequency that is currently causing interference to a frequency slightly removed from the ISM band. For this purpose, a frequency at which the base station and the terminal do not cause any interference should also be supported.

The TDM method refers to a method that changes the discontinuous reception (DRX) or HARQ process setting of the LTE signal to temporally separate the LTE signal from the Bluetooth (or WLAN) signal , The TDM can be a bit complicated, but can be actively used if a supportable frequency is limited. In order to reset the LTE signal described above, in-device coexistence (IDC) can be used - an existing LTE standard technique. That is, in step 455 can the LTE terminal 400 Execute IDC triggering for a network device (for example, developed node B (eNB)). The IDC technique is described in detail below.

2. Avoidance by changing the short-distance communication technology

Short distance communication techniques are highly diversified and include, for example, Bluetooth, wireless LAN, ZigBee and NFC. In addition, IoT device may include a variety of short distance communication modules to support various applications. Accordingly, various short-distance communications can be used for the same purpose. In a case where interference is expected to occur when the Bluetooth communication is used, the LTE terminal requests 400 in step 460 the IoT device 405 to change the short-distance communication technique used to another communication technique that is expected to cause no interference, such as WLAN or ZigBee.

3. Change the timetable of short-distance communication

Short-range communication techniques, such as Bluetooth, use a method of transmitting data in a predetermined cycle. Accordingly, if the predetermined cycle is properly set, the interference between the LTE signal and the signals of the other IoT devices can be avoided or mitigated by the TDM method.

When choosing a correct interference avoidance method, significance (or priority) of the traffic between the respective IoT devices may be taken into account. For example, when the user makes an emergency call using the LTE terminal, the significance of the corresponding traffic can be considered to be the highest. In such a case, when a signal interferes with one of the other IoTs with the LTE terminal signal, the short-distance communication technique of the other IoT devices may be changed instead of resetting the signal of the LTE terminal. This happens because resetting the signal from the LTE terminal takes some time and the emergency call could not be made smoothly during reset. Similarly, if the smart watch is the current health status information the user collects and transmits, such as heart rate, this can be considered as a higher priority than the signals of the other IoT devices.

When transmission / reception of the IoT devices is terminated, the notification of the master agent device that controls the interference is helpful to the master agent device upon completion of the transmission / reception to stop the interference. This happens because the interference avoidance method can be readjusted, taking into account the interference that no longer exists. For this purpose, the IoT devices can directly inform the master broker device that controls the interference of termination of the transmission / reception. Alternatively, the master agent apparatus can directly monitor the transmission / reception operations of the IoT devices, and if the transmission / reception operations are not made for a predetermined period of time, the master agent apparatus determines that the transmission / reception operation is terminated. In the first case, an IoT device might not notify the primary agent device of the termination for a reason. For example, if the IoT device is quickly removed by the user, the IoT device can not notify the master agent device. Accordingly, an operation to compensate for this situation is needed. The latter case has the drawback of increasing the power consumption of the master broker device.

5 FIG. 10 is a flowchart for describing a procedure for controlling inter-IoT device interference in a case where a master agent for controlling interference in the present disclosure describes an LTE terminal.

• Bedingung 1: ob wenigstens eine der Frequenzen, die von dem Terminal 500 an das LTE-measObjectEUTRA-IE angewiesen sind, mit dem ISM-Band interferieren kann, oder Interferenz mit dem ISM-Band verursachen kann (das heißt, ob wenigstens eine Frequenz benachbart zu dem ISM-Band ist)
• Bedingung 2: Ob ein von dem LTE-Terminal 500 unterstütztes Frequenzband angrenzend an das ISM-Band positioniert ist

After the system voltage in step 510 turns on, searches for an IoT device 505 after a master device in step 515 , Here, the master device refers to a device that has the responsibility of controlling inter-device interference. Here is an LTE terminal 500 the master device. In the initial phase of use, the IoT device should at least once through a process of registration with the LTE terminal 500 walk. In the registration process, for example, the user or automatically (by taking into account the capability of the IoT device 440 ), if the IoT device interferes with the LTE terminal 500 is subjected or not. Looking for the LTE terminal 500 The IoT device performs an operation to inform the LTE terminal 500 to turn on the power in step 520 by. In addition, for example, a synchronization operation for cooperating between the types of short-range communications that can be used by the IoT device and between the LTE terminal 500 and the IoT device 505 carried out. Exchange of information between the LTE terminal 500 and the 505 is performed using, for example, a short distance communication such as Bluetooth or WLAN. The LTE terminal 500 determines whether the interference control method in the present disclosure is to be applied to the IoT device considering, for example, a frequency band and a frequency bandwidth used by itself and a communication technique used by the IoT device. If, for example, the IoT device 505 Using the Bluetooth or WLAN communication technology that uses the ISM band determines the LTE terminal 500 whether at least one of the following conditions is met.

• Condition 1: whether at least one of the frequencies coming from the terminal 500 rely on the LTE-measObjectEUTRA-IE, which may interfere with the ISM band, or cause interference with the ISM band (that is, if at least one frequency is adjacent to the ISM band)
• Condition 2: Whether one from the LTE terminal 500 supported frequency band is positioned adjacent to the ISM band

In other words, if frequencies related to, for example, data transmission / reception and measurement, which are typically LTE operations, are positioned adjacent to the ISM band, there may be interference between them when the IoT device is transmitting data using the ISM band. Bands transfers. In one embodiment of the present invention, only the ISM band and LTE frequencies adjacent to it are mentioned, the description can also be applied to all the short distance communication frequencies and frequencies of the other mobile communications except LTE.

If at least one of the above conditions is met, the LTE terminal will issue 500 the IoT device 505 to provide information necessary for the interference control in step 535 required are. The conditions can be varied over time. That is, the frequency of use of the LTE terminal 500 can be moved to a frequency that does not affect the ISM band. Accordingly, it is necessary to correct the earlier setting. For this purpose can reset with respect to the IoT device 505 be executed. Alternatively, the expiration date for the previous setting may be determined based on a timer. This is so because the LTE terminal 500 and the IoT device 505 suddenly can be separated from each other, so that certain information is not between they can be exchanged. For example, the user may use the IoT device 505 far behind. In this case, it is impossible to reset the set information by signals previously received from the LTE terminal 500 were delivered. This may cause the IoT device to unnecessarily report the information received from the LTE terminal 500 in response to data transmission / reception, even if the information was not transmitted in practice. Accordingly, at the time of the setting, a certain timer of both the LTE terminal becomes 500 as well as the IoT device 505 and it is determined that the adjustment is effective only until the expiration of the timer. If it is desired that the validity of the setting be extended, the LTE terminal can 500 perform the reset before the timer expires. In addition, if the LTE terminal 500 sends no feedback even if the IoT device 505 several times similar information to the LTE terminal 500 has reported after the start of short-distance communication, it can be determined that the previous setting is no longer effective. The above-mentioned number of report times may be included at the time of adjustment (step 535 ). In step 545 leads the LTE terminal 500 communication with the base station. If the IoT device 505 Data sent / received via Bluetooth, reported in step 555 the IoT device 505 For example, the type of communication technology used (for example, Bluetooth), the frequency information used, characteristics of the Bluetooth signal (signal pattern, offset, transmit power), absolute time, or the type (or priority) of the traffic to the LTE terminal 500 , The report can be done either before or after the Bluetooth communication is applied. Upon receipt of the report, the LTE terminal determines 500 that the applied Bluetooth communication has just started or will start shortly. In step 565 leads the IoT device 505 Data transmission / reception using Bluetooth. As in step 560 can the LTE terminal 500 a communication signal from the IoT device 505 monitor via a wireless channel. By monitoring, the LTE terminal 500 directly collecting signal characteristic information, or may detect, for example, termination of signal transmission / reception. Accordingly, an alternative may be considered, in that by combining the monitoring, the IoT device 505 not all the information elements described above to the LTE terminal 500 reported, but only certain information items reported, and the LTE device 500 directly monitor and collect further information elements. The particular information elements are the absolute time, the nature (or significance) of the traffic, and the information elements collected by the monitoring are information elements wirelessly from the LTE terminal 500 can be collected. For example, a Bluetooth signal characteristic and frequency information can be collected to the information elements through the monitoring. The LTE terminal 500 determines whether or not specific interference can occur based on the information reported by the IoT device.

As another alternative, with no report from the IoT device, the LTE terminal periodically monitors whether interference is caused by peripheral IoT devices or not and detects interference between the LTE and IoT devices, or between the IoT devices For example, the LTE terminal can wirelessly measure and collect the above-mentioned specific information items, and can perform an interference avoiding operation.

Although only the interference between the LTE terminal and the IoT devices in 5 Interference between another IoT device and another IoT device can also be determined. If the LTE terminal 500 also performs data transmission / reception or measurements at a frequency that can be exercised on the ISM band becomes an interference avoidance method in step 570 applied. The LTE terminal 500 should also determine which interference avoidance method is used. First, the traffic of the LTE terminal 500 and the nature of the traffic of the IoT device. The type of traffic can be represented as the significance (or priority) of data being transmitted / received. If the LTE terminal 500 important data sends / receives, such as an emergency call, becomes the LTE terminal 500 the IoT device 505 instructing to perform an interference avoidance operation. Conversely, if the IoT device sends / receives data in urgent need, such as the transmission of urgent health information, the LTE terminal becomes 500 yourself perform an interference avoidance operation. If the LTE terminal 500 performs the interference avoidance operation, the existing IDC technology in step 575 used. The LTE terminal 500 transmits an InDeviceCoexIndication message to the base station. The message includes information that is required when avoiding interference with the FDM or TDM method. Thus, in step 585 the base station the LTE terminal 500 to avoid interferences by means of an RRC message. The LTE terminal 500 can provide an interference avoidance technique to the IoT device 505 indicate that is performing a short distance communication. As described above, the LTE terminal 500 the IoT device 505 instruct you to use other short distance communication, or request a change to the planning pattern. When the transmission / reception of the LTE terminal 500 very important, and from the IoT device 505 no interference avoidance method is used (if it is a single Short-range communication technology exists or planning change is not possible), the LTE terminal 500 instruct the IoT device to stop or postpone the transmission / reception. If the short distance communication in step 590 is terminated informs the IoT device 505 the LTE terminal 500 about the termination. Or if a transmit / receive signal from the IoT device 505 is not detected for a predetermined period of time, sees the LTE terminal 500 the transmission / reception is finished. In addition, the opposite side transmits a kind of feedback regarding all the news 520 . 535 . 555 . 580 . 590 and 595 that is between the LTE terminal 500 and the IoT device 505 Depending on whether the feedback is received or not, it is possible to determine whether the two devices are at two effective distances from each other. The effective distance is a distance between respective IoT devices and can be defined, for example, in a human body size. As an option, the LTE terminal 500 a message "Enable setting" to the IoT device 505 to transfer.

6 Fig. 10 is a view for describing IDC, which is an existing LTE technique.

IDC refers to a technique for minimizing interference when multiple communication modules interfere with each other. State-of-the-art terminals have various functions, and are supplied with various communication modules for supporting the functions. In addition to an LTE communication module 600 For example, a Global Positioning System (GPS) module 605 for identification of the geographical location, or a short-distance communication module 610 be provided such as Bluetooth or WLAN. The module sends / receives required data via, for example, antenna 615 . 620 and 625 which are each connected to it. The frequency bands of the respective communication systems are different from each other. However, using adjacent bands may cause inter-communication module interference. This is caused by the fact that the transmitted / received signals are not ideally separated between the bands. In addition, each communication module and an associated antenna are included in a terminal device, and thus are very close to each other. Thus, the interference intensity acting therebetween can be relatively high. Accordingly, to reduce the interference, control of the transmission power between the communication modules is required. For example, if a short distance communication module 610 , such as Bluetooth or WLAN, data reception to LTE uplink attempts, a transmission signal of the LTE communication module 600 with the short distance communication module 610 interfere. To mitigate this, the amount of interference may be limited by limiting the maximum uplink transmit power of the LTE communication module 600 to be controlled. Alternatively, the interference power that influences the short-distance communication module 610 by temporarily stopping the operation of the LTE communication module 600 be removed. In contrast, the short distance communication module 610 with a received signal of the LTE communication module 600 interfere with the LTE downlink. Although the IDC technique is a technique for avoiding interference between different communication modules in a device, the IDC technique may be used sufficiently to avoid interference between various communications from other devices positioned close to each other as in the present disclosure.

7 FIG. 14 is a view for describing a procedure in which a terminal provides information about a base station needed to minimize IDC interference in an existing LTE standard.

As described above, an LTE terminal 700 Even to prevent interference with Bluetooth or WLAN communications, an FDM or TDM technique can be used.

The FDM method refers to a method in which the LTE terminal 700 Information about a frequency that interferes with other short-range communications by means of an InDeviceCoexIndication (RRC) message to a base station 705 reported. Then point the base station 705 the LTE terminal 700 to do a handover to use a frequency that is affected by the interference. The TDM method is a method that times out and prevents interference by adapting, for example, a DRX or Hybrid Automatic Repeat Request (HARQ) process pattern (or HARQ bitmap pattern) while maintaining an existing serving frequency.

For example, the base station uses 705 an RRC connection reconfiguration message in step 710 to send various setting message items to the LTE terminal 700 to deliver such as cell measurement and DRX. When it is determined that frequencies for which a measurement command from the base station 705 is received by the IDC inference, transmits the LTE terminal 700 DRX setting information capable of minimizing the IDC interference to which base station 705 using the InDeviceCoexIndication message in step 715 , The DRX setting information includes DRX cycle information, offset information notifying a DRX start time, and DRX active time information.

DRX cycle length: The DRX cycle length is a distance between any activation period and the next activation. As the DRX cycle length increases, a sleeping period increases and the power consumption of a terminal is reduced. However, if the DRX cycle length is long, a disadvantage occurs in that a call delay increases. The DRX cycle length is signaled by a network.

Offset Information: The official information is typically induced from a unique identifier of a terminal and the DRX cycle length. For example, a value obtained by performing a mode operation on the identifier of the terminal by the DRX cycle length of the identifier of the terminal may be used as a start time from the activation period.

DRX active time: The DRX active time means a length of a period in which the terminal is awake during an activation period, and a predetermined value is usually used for the DRX active time. For example, the length of the activation period in a mobile communication system is 10 ms.

Table 1 below illustrates DRX setting message for minimizing IDC interference as defined in LTE standard document 3GPP S36.331. Table 1

Here, sf40 represents 40 subframe units. In particular, drx offset represents an offset value indicating a DRX start time, and is defined by the following Equation 1.

Equation 1

• [(SFN · 10) + subframe number] modulo (drx-CycleLength) = drx offset

As indicated in equation 1, SFN (system frame number) is used. SFN is a command number of a radio frame and has a value from 0 to 1023. After an SFN period (0-1023), the next SFN period is started again from the value 0.

8th FIG. 10 is a flow chart for describing a process in which an IoT device authorized to control interference controls interference between the other IoT devices.

Two IoT devices 805 and 810 are around an LTE terminal 800 available and entitled to control interference. The two IoT devices undergo interference control of the LTE terminal through an initial setup process (step 815 ). In step 820 determines the LTE terminal 800 whether interference control is required between the peripheral IoT devices, including itself. If it is determined that the interference control is required, the LTE terminal stops 800 each of the IoT devices 805 and 810 to report information required by the controller (steps 825 and 830 ). When the IoT device 1 805 begins with data communication (step 835 ), reports the IoT device 1 805 Transmission signal information to the LTE terminal 800 (Step 840 ). The LTE terminal 800 can wirelessly monitor the signal from the IoT device (step 845 ). The LTE terminal 800 determines if interference is practically between itself and the peripheral IoT devices (step 850 ) and if it is determined that there is no interference (step 855 ), leads the LTE terminal 800 no specific surgery. Meanwhile, when the IoT device 2 810 begins with data communication (step 860 ), reports the IoT device 2 810 the transmission signal information to the LTE terminal 800 (Step 865 ). The LTE terminal 800 can wirelessly monitor the signal from the IoT device (step 870 ). The LTE terminal 800 Determines whether or not there is interference between you and the peripheral IoT devices in practice (step 875 ). If it is determined that interferences with the IoT device 1 805 that already performed data communications, determines the LTE terminal 800 a method for avoiding interference (step 880 ). First, it should be determined which of the two devices will perform the avoidance operation. Occasionally, both devices can perform the avoidance operation. To select the device that performs the avoidance operation, various elements can be considered.

• Erstes Verfahren: Ändern einer verwendeten Kurzstreckenkommunikationstechnik (z. B. Bluetooth → WLAN, ZigBee)
• Zweites Verfahren: Anpassen einer verwendeten Kurzstreckenkommunikations-Planung (z. B. Anpassung eines Zyklus-Musters des Bluetooth-Signal-Zyklus)

The first is some kind of traffic from every device. As described above, an apparatus for performing the avoidance operation may be selected depending on how significant a service is on the way to send / receive. In general, when the avoidance operation is performed, it is usually difficult to send / receive data communication during this time. Accordingly, when important data (eg, body health information) or time-sensitive data is sent / received, the avoidance operation can be avoided. When the services of two devices are the same in significance, effects obtained by performing the avoidance operation can be considered. If the transmission / reception capability of the device that performed the avoidance operation is very poor, the device can perform the avoidance operation that is less expected to deteriorate in performance. The interference control between short-distance communication devices can be performed by various methods.

• First method: Change a short-distance communication technique used (eg, Bluetooth → WLAN, ZigBee)
• Second Method: Adapting Used Short Distance Communication Planning (eg, Adjusting a Cycle Pattern of the Bluetooth Signal Cycle)

LTE terminal 800 chooses a device that will perform the avoidance operation, determines an avoidance operation method, and instructs the associated IoT device to execute it (steps 885 and 890 ).

9 Fig. 10 is a conceptual view of a procedure in which an authority for controlling interference is transmitted to another IoT device.

A user 910 has a total of three types of IoT devices, such as an LTE terminal 915 , a wireless headset 925 and a smart watch 930 , At this time, it is assumed that the LTE terminal 915 is authorized to control interference. The user 910 can own and use a new IoT device. For example, the user is traveling 910 in a wireless car. The car includes various communication modules in order to be able to connect wirelessly to various peripheral IoT devices and offer services that can enhance the user's convenience. In addition, the car is directly connected to an LTE base station (step 905 ) in order to be able to provide data communication to the user. In general, the car can with plenty of power compared to the LTE terminal 915 to be delivered. Accordingly, the power consumption of the LTE terminal 915 be reduced if the authority to control the interference are transmitted to the car. The car with the interference control function will come with the authority of the LTE terminal 915 equipped (step 920 ) and not only controls the LTE terminal 915 , but also the peripheral IoT devices (step 920 ). The final decision to transfer the authority may be made by the user, or may be in accordance with a role designated in advance by the user. For example, the user may register in advance the IoT devices together with their priorities, which are capable of executing the execution of the authority together. If a device that currently has authority comes within range of another device that has authority, the initial recruitment process confirms that the two devices have authority and authority becomes dependent on the priorities thereof transfer. Or a setting can be made so that the fact that there is another device with the authority in the environment is displayed to the user so that the user has to make the final decision.

In the initial state of the application, if an IoT device for which the LTE terminal 915 When the device with the control authority is set, the IoT device informs the LTE terminal 915 first from powering up, and performs the initial setup process. However, the device that currently has the authority of the car. Accordingly, the LTE terminal 915 transmit the control authority and instruct the device that is turned on to be controlled by the car. In addition, in a case of a particular IoT device, when the IoT device is turned on, a variety of devices having authority in the past can be found. In this case, the initial setting process is performed on a specific device according to a prescribed rule. For example, the initial adjustment process may be performed on any device that had the authority last Device that had the earliest authority, and a device that had authority in the past. Even though the IoT device is performing the initial setup process on a device that does not currently have the authority, the device will provide an instruction to the IoT device, as the device that currently has the authority.

10 Fig. 10 is a flow chart for describing a procedure in which an authority for controlling interference is transmitted to another IoT device.

An LTE terminal 1000 , which currently has the authority to control interference, controls the interference of the IoT device 2 1010 , At this time comes the IoT device 1 1005 within range for performing the initial setup process (step 1015 ). The LTE terminal decides to give authority to the IoT device 1 1005 to transfer (step 1020 ). At this time, the LTE terminal gives the authority transfer to the IoT device 1 1005 and the IoT device 2 1010 known (step 1025 and step 1030 ). From this point in time, the LTE terminal and the IoT device will report 2 1010 the information about data transmission / reception (step 1035 ) to the IoT device 1 1005 (Step 1040 ). The IoT device 1 1005 , which is equipped with authority, monitors signals from the peripheral IoT devices (step 1045 ) and determines if there is any interference between yourself and the peripheral IoT devices (step 1050 ). If it is determined that interference is occurring (step 1055 ), the IoT device 1 1005 prompt the IoT device to set the interference (step 1065 ). The IoT device 2 1010 can transfer the authority again (step 1070 ), and can communicate this to the device to which the authority will be transferred (step 1075 ). Or, if an IoT device with authority is no longer detected within range, a device that had authority in the past or a device that has the interference control function may trigger the initial setup process in the IoT devices ( step 1080 ). The peripheral IoT devices perform the initial setup process depending on the nonexistence of the device that had authority (step 1085 ), and through the process a new device with the authority is selected and the instruction of the device is followed.

11 FIG. 10 is a block diagram showing an internal configuration of a terminal according to an embodiment of the present disclosure. FIG.

For example, a terminal sends / receives data to / from an upper layer 1110 , and transmits / receives control messages via a control message processing unit 1115 , In addition, when a control signal or data is transmitted to a base station, the terminal multiplexes the data via a multiplexing device 1105 , according to a control command of a controller 1120 and then transmits the data via a transmitter 1100 , In contrast, when a signal is received, the terminal receives a physical signal through a receiver 1100 according to a control command of the controller 1120 , then demultiplexes the received signal by a demultiplexing device 1105 and sends the signal to the upper layer 1110 or the control message processing unit 1115 according to the news information.

Meanwhile, in the foregoing, it has been described that the terminal is formed of a plurality of blocks performing different functions. However, this is merely an embodiment and the present invention is not limited thereto. For example, the function performed by the demultiplexing device 1105 is executed by the controller 1120 yourself.

Meanwhile, it can be appreciated that an apparatus for controlling inter-IoT device interference according to an embodiment of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software. Such software may be stored, for example, in a volatile or nonvolatile memory such as a ROM, a memory such as a RAM, a memory chip, a memory device or a memory IC, or a writable optical or magnetic medium such as a CD DVD, a magnetic disk or a magnetic tape, regardless of the ability to be deleted or the ability to be rewritten. It should be understood that the method of controlling interference between Internet-of-things devices may be implemented by a computer or portable terminal that includes a controller and a memory, and the memory is an example of a machine-readable device that is suitable is for storing a program or programs including instructions that implement embodiments of the present disclosure.

Accordingly, the present invention includes a program code for executing with the apparatus in the appended claims of the specification and a machine (computer or the like) readable storage medium for storing the program. The program may further be electronically transmitted via any medium, such as a communication signal carried over a wired or wireless connection, and embodiments include these as appropriate.

In addition, the apparatus for controlling inter-IoT device interference according to the present disclosure may receive and store a program from a program providing device connected thereto in a wired or wireless manner. The program providing apparatus may include: a program having predetermined instructions that cause the program processing apparatus to execute a method for controlling inter-IoT device interference; a memory storing, for example, information for the method of controlling inter-IoT device interference; a communication unit that performs wired or wireless communication with the program processing device; and a controller that transmits the program or automatically according to a request of the program processing device.

While the present invention has been shown and described with respect to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the scope of the present invention as defined in the appended claims. Therefore, the scope of the present disclosure should not be defined as limited to the embodiments, but should be defined by the appended claims and their equivalents.

LIST OF REFERENCE NUMBERS

200, 300, 900

base station

205, 305, 905

LTE signal

210, 310, 910

user

215, 315, 915

LTE terminal

220

LTE signal interference

225, 325, 925

Portable device 1 (wireless headset)

230, 330, 930

Portable device 2 (smart watch)

235, 335, 935

Bluetooth signal

320, 925

Exchange interference control information

920

Transfer interference control adjustment authority

Claims (26)

Apparatus for controlling interference between devices in a terminal, the apparatus comprising: a controller configured to select a device that performs interference avoidance between devices capable of performing inter-device communication based on a significance of a service; and a receiving unit configured to receive interference avoidance information needed by the selected interference avoidance device; wherein the controller determines an interference avoidance method based on the interference avoidance information. The apparatus of claim 1, wherein the interference avoidance information comprises at least one of a short distance communication signal, an absolute time, a signal transmission power, and offset information representing a start time. The apparatus of claim 1, wherein the interference avoiding method comprises a method of resetting a frequency of a mobile communication signal if the interference between the mobile communication signal and a short-distance communication technique occurs. The apparatus of claim 1, wherein the interference avoiding method comprises a method of changing a short-distance communication technique to another short-distance communication technique if the interference occurs between the mobile communication signal and a short-distance communication technique. The apparatus of claim 1, wherein the interference avoiding method comprises a method of changing a scheduling of short-distance communication if the interference between the mobile communication signal and a short-distance communication technique occurs. The apparatus of claim 1, wherein if it is determined that frequencies for which a metering instruction is issued by a base station are affected by in-device coexistence (IDC) interference, the terminal transmits an InDeviceCoexIndication message to the base station. The apparatus of claim 6, wherein the InDeviceCoexIndication message comprises a discontinuous receive (DRX) setting message capable of minimizing IDC interference. The apparatus of claim 7, wherein the DRX setting information comprises DRX cycle information, offset value information for notifying a DRX start time, and DRX active time information. Apparatus for preventing interference in a device among devices, the device comprising: a receiving unit configured to receive, from a terminal, a message informing that a device performing an interference avoidance is selected among devices capable of performing inter-device communication based on a Significance of a service; and a transmission unit configured to transmit interference avoidance information needed for interference avoidance, wherein an interference avoidance method is based on the interference avoidance information. The apparatus of claim 9, wherein the interference avoidance information comprises at least one of a short distance communication signal, an absolute time, a signal transmission power, and offset information representing a start time. The apparatus of claim 9, wherein the interference avoiding method comprises a method of resetting a frequency of a mobile communication signal if the interference between the mobile communication signal and a short-distance communication technique occurs. The apparatus of claim 9, wherein the interference avoiding method comprises a method of changing a short-distance communication technique into another short-distance communication technique if the interference occurs between the mobile communication signal and a short-distance communication technique. The apparatus of claim 9, wherein the interference avoiding method comprises a method of changing a scheduling of short-distance communication if the interference between the mobile communication signal and a short-distance communication technique occurs. The apparatus of claim 9, wherein if it is determined that frequencies for which a metering instruction is issued by a base station are affected by in-device coexistence (IDC) interference, the terminal transmits an InDeviceCoexIndication message to the base station. The apparatus of claim 14, wherein the InDeviceCoexIndication information comprises discontinuous receive (DRX) setting information capable of minimizing IDC interference. The apparatus of claim 15, wherein the DRX setting information comprises DRX cycle information, offset value information for notifying a DRX start time, and DRX active time information. Apparatus for controlling interference between devices in a terminal, the apparatus comprising: a controller configured to determine that the authority is transmitted to at least one of the devices that perform interference avoidance, and that an indicator for indicating the authority Transmission to the particular device, the particular device selecting a device that performs interference avoidance among devices capable of performing inter-device communication based on significance of service and interference avoidance Receives information from the selected device needed for interference avoidance, wherein an interference avoidance method is based on the interference avoidance information. The apparatus of claim 17, wherein the interference avoidance information comprises at least one of a short distance communication signal, an absolute time, a signal transmission power, and / or offset information representing a start time. The apparatus of claim 17, wherein the interference avoiding method comprises a method of resetting a frequency of a mobile communication signal if the interference between the mobile communication signal and a short-distance communication technique occurs. The apparatus of claim 17, wherein the interference avoiding method comprises a method of changing a short-distance communication technique into another short-distance communication technique if the interference occurs between the mobile communication signal and a short-distance communication technique. The apparatus of claim 17, wherein the interference avoiding method comprises a method of changing a design of short-distance communication if the interference between the mobile communication signal and a short-distance communication technique occurs. Apparatus for preventing interference in a device among devices, the device comprising: a controller configured to receive an indicator for indicating authority transmission from a terminal, selecting a device that performs interference avoidance among devices capable of performing inter-device communication based on significance a service, and receiving interference avoidance information from the selected device needed for the interference avoidance, wherein an interference avoidance method is based on the interference avoidance information. The apparatus of claim 22, wherein the interference avoidance information comprises at least one of a short distance communication signal, an absolute time, a signal transmission power, and offset information representing a start time. The apparatus of claim 22, wherein the interference avoiding method comprises a method of resetting a frequency of a mobile communication signal if the interference between the mobile communication signal and a short-distance communication technique occurs. The apparatus of claim 22, wherein the interference avoiding method comprises a method of changing a short-distance communication technique to another short-distance communication technique if the interference occurs between the mobile communication signal and a short-distance communication technique. The apparatus of claim 22, wherein the interference avoiding method comprises a method of changing a design of short-distance communication if the interference between the mobile communication signal and a short-distance communication technique occurs.

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