WO2018203402A1

WO2018203402A1 - User device and base station

Info

Publication number: WO2018203402A1
Application number: PCT/JP2017/017301
Authority: WO
Inventors: 真平安川; 聡永田; 尚人大久保; ウリアンダルマワンティハプサリ; 高橋　秀明
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2017-05-02
Filing date: 2017-05-02
Publication date: 2018-11-08

Abstract

Provided is a wireless communication control method which is suitable for specific types of user device. One embodiment of the present invention is related to a user device which is provided with: a parameter management unit for managing parameters related to the user device; and a transmission/reception unit which transmits and receives wireless signals to and from a base station. The parameter management unit is provided with a type parameter which indicates that the user device is of a specific type. When the user device is in an idle state, the transmission/reception unit applies a wireless parameter which is received from the base station, and which corresponds to the specific type.

Description

User equipment and base station

The present invention relates to a wireless communication system.

Currently, unmanned aerial vehicles such as drones have been used in various corporate and personal uses. In the future, it is anticipated that drone services using wireless networks such as LTE (Long Term Evolution) networks and NR (New RAT) networks will be realized.

Under these assumptions, a new study item "New SID on Enhanced Support Vehicles" is being developed to examine the feasibility of specific types of user equipment (User Equipment: UE) such as drones in the LTE network. Approved by Partnership Project), performance evaluation, potential problems, and improvement technologies when connecting unmanned aircraft in an existing LTE network are being studied.

) Unmanned aerial vehicles such as drones are capable of flying at higher altitudes than base stations, and are expected to perform wireless communications within a line-of-sight environment of multiple cells. For this reason, wireless communication control different from existing user devices arranged on the ground is desired.

In view of the above-described problems, an object of the present invention is to provide a wireless communication control technique suitable for a specific type of user device.

In order to solve the above-described problem, an aspect of the present invention is a user device, which includes a parameter management unit that manages parameters related to the user device, and a transmission / reception unit that transmits and receives radio signals to and from the base station. The parameter management unit has a type parameter indicating that the type of the user device is a specific type, and when the user device is in an idle state, the transmission / reception unit receives the received from the base station The present invention relates to a user apparatus that applies a radio parameter corresponding to a specific type.

According to the present invention, it is possible to provide a radio communication control technique suitable for a specific type of user device.

FIG. 1 is a schematic diagram illustrating that a certain type of user equipment interferes with neighboring cells. FIG. 2 is a schematic diagram illustrating a wireless communication system according to an embodiment of the present invention. FIG. 3 is a block diagram illustrating a functional configuration of a user apparatus according to an embodiment of the present invention. FIG. 4 is a block diagram showing a functional configuration of a base station according to an embodiment of the present invention. FIG. 5 is a schematic diagram illustrating transmission of radio parameters for each UE type from a base station according to an embodiment of the present invention. FIG. 6A is a schematic diagram illustrating an application example of radio parameters for each UE type according to an embodiment of the present invention. FIG. 6B is a schematic diagram illustrating an application example of radio parameters for each UE type according to an embodiment of the present invention. FIG. 7A is a schematic diagram illustrating an application example of radio parameters for each UE type according to an embodiment of the present invention. FIG. 7B is a schematic diagram illustrating an application example of radio parameters for each UE type according to an embodiment of the present invention. FIG. 8 is a sequence diagram illustrating a wireless communication process between a specific type of user apparatus and a base station according to an embodiment of the present invention. FIG. 9 is a block diagram illustrating a hardware configuration of a user apparatus and a base station according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the following embodiments, a specific type user apparatus that easily gives uplink interference to a neighboring cell and a base station that controls radio communication with the specific type user apparatus are disclosed. Various embodiments will be described with reference to a non-terrestrial user equipment that is not located on the ground, such as a drone, but the present invention is not limited to this, and any one that is likely to cause uplink interference to neighboring cells. It is applicable to this type of user equipment.

Generally, a drone can fly at a higher altitude than a base station, and is assumed to perform wireless communication within a line-of-sight environment of multiple cells. Under such an assumption, for example, uplink transmission from a drone to a connected cell may cause uplink interference to a neighboring cell as shown in FIG. Therefore, transmission power control suitable for a specific type of user equipment that is likely to cause uplink interference in such adjacent cells is desired.

In an embodiment described later, an uplink transmission power control method is provided when a specific type of user equipment is in an idle state (such as an RRC (Radio Resource Control) _IDLE state). That is, the user apparatus holds a type parameter indicating the type of the user apparatus, and when the base station broadcasts system information indicating a radio parameter for each user apparatus type, the user apparatus corresponds to the type indicated in the type parameter. Perform uplink transmission to the base station according to the radio parameters. Thereby, even when the base station cannot acquire the registration information of the user apparatus from the core network, such as when the user apparatus is in an idle state, uplink transmission is executed with a radio parameter suitable for the type of the user apparatus. Uplink interference to neighboring cells due to uplink transmission from a non-terrestrial user apparatus can be avoided. Further, the user apparatus adaptively adjusts the type parameter, or applies a radio parameter suitable for the measured radio state, altitude, and the like. Thereby, transmission power control can be adaptively adjusted with respect to the user apparatus in flight and the user apparatus on the ground.

First, a radio communication system according to an embodiment of the present invention will be described with reference to FIG. FIG. 2 is a schematic diagram illustrating a wireless communication system according to an embodiment of the present invention.

2, the wireless communication system 10 includes a user apparatus 100 and a base station 200. The wireless communication system 10 may be any wireless communication system defined by 3GPP, such as an LTE system, an LTE-Advanced system, or an NR system, or may be any other wireless communication system. May be.

The user apparatus 100 is any information processing apparatus that can be communicably connected to the base station 200. For example, the user apparatus 100 may be a drone, an unmanned aircraft, a non-ground-arranged user apparatus, or a part thereof. . Typically, the user apparatus 100 is any type of user apparatus that is preferably subjected to wireless control different from that of a conventional ground-based user apparatus.

The base station 200 performs wireless communication with a number of user apparatuses including the user apparatus 100 under the control of an upper station (not shown) such as a core network. In the LTE system and the LTE-Advanced system, the base station 200 can be referred to as eNB (evolved NodeB), for example. In the NR system, the base station 200 can be referred to as gNB, for example. In the illustrated embodiment, only one base station 200 is shown, but typically multiple base stations are arranged to cover the coverage area of the wireless communication system 10.

Next, a user apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 3 is a block diagram illustrating a functional configuration of a user apparatus according to an embodiment of the present invention.

As shown in FIG. 3, the user apparatus 100 includes a parameter management unit 110 and a transmission / reception unit 120.

The parameter management unit 110 manages parameters related to the user device 100. Specifically, the parameter management unit 110 holds and updates various parameters that are set in advance or dynamically set for the user device 100.

In this embodiment, the parameter management unit 110 may have a type parameter indicating the type of the user device 100. In one example, the type parameter may be a parameter indicating whether the user device 100 is a conventional ground-type user device such as a smartphone or a tablet, or a non-ground-type user device such as a drone or an unmanned aircraft. . For example, when the user device 100 is a ground-placement type user device, the type parameter Drone indicator is preset to “0”, and when the user device 100 is a non-ground-placement type user device, the type parameter Drone indicator is “1”. May be set in advance. The user device 100 can determine whether the user device 100 is a ground-arranged user device or a non-ground-arranged user device by referring to the type parameter. The type parameter described above is set to “0” or “1” and can be represented by one bit, but is not limited thereto, and may be represented by an arbitrary number of bits. The type parameter may indicate authentication or license for communication under specific conditions. For example, the type parameter Drone indicator is set to 1 in advance indicates that the terminal is authenticated in advance to perform communication while flying.

The transmission / reception unit 120 transmits / receives a radio signal to / from the base station 200. Specifically, the transmission / reception unit 120 transmits / receives a downlink / uplink control signal and a downlink / uplink data signal to / from the base station 200 according to various radio parameters notified from the base station 200.

In this embodiment, when the type parameter indicates that the user apparatus 100 is a specific type, when the user apparatus 100 is in the idle state, the transmission / reception unit 120 corresponds to the specific type received from the base station 200. Apply radio parameters. That is, when the user apparatus 100 is in the idle state and located in the base station 200, the transmission / reception unit 120 receives various system information related to the located cell that is periodically broadcast from the base station 200. In the present embodiment, the base station 200 broadcasts system information for each type of the user equipment 100, and specifically, the radio parameters for the ground-arranged user apparatus and the radio parameters for the non-terrestrial-arranged user apparatus are obtained. Including system information.

Thereafter, when the user apparatus 100 establishes a wireless connection with the base station 200, the transmission / reception unit 120 transmits a wireless connection request to the base station 200 in accordance with the wireless parameters indicated in the received system information. Specifically, when the type parameter indicates that the user apparatus 100 is a terrestrial user apparatus, the transmission / reception unit 120 sends a radio connection request to the base station 200 according to the received radio parameter for the terrestrial user apparatus. Send. On the other hand, when the type parameter indicates that the user device 100 is a non-terrestrial user device, the transmission / reception unit 120 transmits a radio connection request to the base station 200 according to the received radio parameter for the non-terrestrial user device. To do.

Typically, the radio parameters for non-terrestrial user equipment are for terrestrial user equipment so that the user equipment 100 does not cause uplink interference in neighboring cells when performing uplink transmission in a line-of-sight environment. The transmission power may be instructed to be lower than the radio parameter. That is, in the uplink transmission power parameter for non-terrestrial user equipment, lower transmission power is set than the uplink transmission power parameter for conventional terrestrial user equipment. Thereby, even when the base station 200 cannot confirm that the user apparatus 100 is in an idle state and the user apparatus 100 is a non-terrestrial user apparatus, the wireless connection request transmitted from the user apparatus 100 Uplink interference to neighboring cells can be avoided.

Note that, unlike the Rel-12 LTE specification, the radio parameter is applicable to UL / DL communication and is not limited to the frequency range where radio communication is performed or can be performed, and is also applied within the frequency range. May be.

Next, a base station according to an embodiment of the present invention will be described with reference to FIG. FIG. 4 is a block diagram showing a functional configuration of a base station according to an embodiment of the present invention.

As illustrated in FIG. 4, the base station 200 includes a system information management unit 210 and a communication control unit 220.

The system information management unit 210 transmits system information as well as system information indicating radio parameters for each type of user device. Specifically, the system information management unit 210 holds system information indicating radio parameters for ground-based user devices and radio parameters for non-ground-based user devices, and broadcasts the system information to the cell.

In one embodiment, the system information management unit 210 may transmit system information indicating radio parameters for user devices whose type parameters are not set or held in addition to the radio parameters for each type of user device. For example, as illustrated in FIG. 5, the system information management unit 210 is configured for an uplink power control parameter for a non-terrestrial user device (Drone indicator = 1), and for a terrestrial user device (Drone indicator = 0). Uplink power control parameters and normal uplink power control parameters (Common UL) may be broadcast. Upon receiving these uplink power control parameters, the user device 100 in the idle state is an uplink for a non-terrestrial user device (Drone indicator = 1) when its type parameter Drone indicator is “1”. When the power control parameter is applied and the type parameter Drone indicator is “0”, the uplink power control parameter for the ground-arranged user equipment (Drone indicator = 0) is applied, and the type parameter is not set or held. If not, apply normal uplink transmit power parameters.

The communication control unit 220 controls wireless communication with the user device 100. For example, upon receiving a connection request from the idle user device 100, the communication control unit 220 establishes a wireless connection with the user device 100. Thereafter, the communication control unit 220 schedules radio resources for the user apparatus 100 and sets various radio parameters for controlling radio communication with the user apparatus 100.

In one embodiment, the type parameter may be a position dependent parameter. That is, the type parameter may be variably set according to the geographical range represented by the latitude and longitude of the user device 100. For example, as shown in FIG. 6A, the parameter management unit 110 may set the Drone indicator to “1” in a predetermined geographical range, and set the Drone indicator to “0” in other geographical ranges. It may be good or unset. In this case, the transmission / reception unit 120 applies the uplink power control parameter for Drone indicator = 1 in the geographical range of Drone indicator = 1, and Drone indicator = 0 in the geographical range of Drone indicator = 0 or not set. The normal uplink power control parameter or the normal uplink power control parameter may be applied. This embodiment is considered suitable when the area where the use of the user device 100 as a drone is authenticated in the wireless communication system 10 is limited.

Also, the type parameter may be a parameter depending on the height. That is, the type parameter may be variably set according to the altitude of the user device 100. For example, as shown in FIG. 6B, when the user device 100 is at or above a predetermined altitude (Xm or the like), the parameter management unit 110 sets the Drone indicator to “1” and the user device 100 is less than the predetermined altitude. In this case, the parameter management unit 110 may set the Drone indicator to “0” or may not set it. In this case, the transmission / reception unit 120 applies the uplink power control parameter for Drone indicator = 1 in the altitude range of Drone indicator = 1, and for Drone indicator = 0 in Drone indicator = 0 or in the unset altitude range. Apply uplink power control parameters or normal uplink power control parameters. In this embodiment, the user equipment 100 that can function as a non-terrestrial user apparatus is located at a relatively high altitude and may cause uplink interference to neighboring cells. It is possible to apply wireless parameters for the device.

In one embodiment, the type parameter may be a parameter depending on one or both of the position and the height. That is, the type parameter may be variably set according to one or both of the geographical range and the altitude of the user device 100. According to this embodiment, one or both of the variable setting of the Drone indicator according to the above-described geographical range and the variable setting of the Drone indicator according to the altitude are applied, so that the control of the Drone indicator with higher granularity is applied. Is possible.

Also, the type parameter may be represented by an arbitrary number of bits. In the above-described embodiment, the Drone indicator is set to a parameter value of “0” or “1”, but is not limited thereto, and may be represented by an arbitrary number of bits. For example, as shown in FIG. 7, the Drone indicator may be set to “0”, “1”, or “2”. In the example shown in FIG. 7A, the Drone indicator is set to “1” in one geographical range, “2” in a different geographical range, and the Drone indicator is set to “2” in other geographical ranges. It may be set to “0” or may not be set. In this case, the transmission / reception unit 120 applies the uplink power control parameter for Drone indicator = 1 in the geographical range of Drone indicator = 1, and increases for Drone indicator = 2 in the geographical range of Drone indicator = 1. The link power control parameter is applied, and the Drone indicator = 0 or the uplink power control parameter for the Drone indicator = 0 or the normal uplink power control parameter is applied in the unset geographical range. In the example shown in FIG. 7B, the altitude range is divided into three ranges of low altitude (altitude <Xm), medium altitude (Xm ≦ altitude <Ym), and high altitude (Ym ≦ altitude). Drone indicator is set to “0” or not set, “1” and “2”. As described above, the parameter management unit 110 may hold a Drone indicator preset to “0” or not set, “1” or “2” for each predetermined three-dimensional space range. According to the present embodiment, a parameter value represented by an arbitrary number of bits can be set for each spatial range, and control of the Drone indicator with higher granularity becomes possible.

In another embodiment, the type parameter may be a parameter independent of position and / or altitude. That is, if the user device 100 is a drone, the fact itself is not position and / or altitude dependent. Therefore, the parameter management unit 110 may retain a fixed type parameter indicating that the user device 100 is a ground-based user device or a non-ground-based user device without depending on the position and / or altitude. Good.

In another embodiment, the system information management unit 210 may further transmit system information indicating a flight availability parameter. For example, the flight propriety parameter may indicate flight feasibility, a flight feasible range, etc. in the cell. When the received flight propriety parameter indicates that the flight is possible, the non-ground placement type user apparatus 100 determines that the flight is possible in the cell, and the received flight propriety parameter indicates that the flight is not possible. The non-ground-arranged type user apparatus 100 can determine that flight is not possible in the cell. According to the present embodiment, it is possible to separately notify the user apparatus 100 whether or not the flight in the cell is possible.

In another embodiment, the transmission / reception unit 120 may apply radio parameters applied in an idle state (such as RRC_IDLE state) even after transitioning to a connected state (such as an RRC_CONNECTED state). For example, the transmission / reception unit 120 may continue to apply the wireless parameter applied in the idle state (such as the RRC_IDLE state) until a new wireless parameter is instructed from the communication control unit 220 after the transition to the connection state. According to the present embodiment, when it takes time for the base station 200 to query the core network for the type of the user apparatus 100, the transmission / reception unit 120 shifts to the connected state while reducing the delay due to the time required for the inquiry. The radio signal can be exchanged with the base station 200 immediately after.

The parameter management unit 110 holds various parameters such as radio parameters and / or authentication information that are effective in the coverage, and the parameters are notified and / or written by application and / or NAS (Non-Access Stratum) signaling. It may be written to the user apparatus 100 and / or a SIM (Subscriber Identity Module) card at the time of contract by the business operator. Various parameters may be different for each frequency.

In one embodiment, the wireless parameter may be a parameter used in a random access procedure. That is, when the user apparatus 100 in an idle state establishes a wireless connection with the base station 200, the transmission / reception unit 120 performs a wireless connection process on a RACH (Random Access Channel). The transmission / reception unit 120 executes a random access procedure by applying a radio parameter corresponding to the value of the type parameter managed by the parameter management unit 110 among the radio parameters for each type of user apparatus received from the base station 200. .

Specifically, the radio parameter may be a RACH power ramping parameter in which an initial received power target, a power step, and / or a maximum transmission power are defined. By separately setting the power ramping parameters for the non-terrestrial user equipment, it becomes possible to avoid the user equipment 100 such as a drone transmitting RACH with excessive power and causing uplink interference, Normal user equipment uplink transmission can be protected.

Further, the radio parameter may be a Message 3 transmission power parameter in which an open loop power control parameter (target reception power, path loss compensation factor, etc.), transmission power offset, and / or maximum transmission power are defined. By setting the Message 3 transmission power parameter for non-terrestrial type user equipment, it is possible to avoid that the user equipment 100 such as drone transmits Message 3 with excessive power and causes uplink interference. Thus, it is possible to protect the normal user equipment uplink transmission.

Also, the radio parameter may specify RACH resources such as RACH time, frequency and / or sequence. By separately setting the RACH resource parameters for the non-terrestrial user equipment, it becomes possible to apply the time, frequency and / or sequence of independent RACH for the drone, and the normal user equipment uplink transmission can be performed. Can be protected.

Further, the radio parameter may specify a RACH preamble format. For example, if a drone is operated in a remote area where isolated cells exist, can communicate with a line-of-sight, and has a wider effective coverage than a ground-based user device, a preamble suitable for a non-ground-based user device The format may be set separately. When the preamble formats suitable for the ground-arranged type user apparatus and the non-ground-arranged type user apparatus are different, it is possible to set a preamble format suitable for each.

Further, the radio parameter may specify whether or not the RACH can be transmitted. For example, at high altitudes where the level of interference is very high, the radio parameter may prohibit RACH transmission (such as temporarily). As described above, by prohibiting the user apparatus 100 located at a high altitude from RACH transmission, it is possible to protect the uplink transmission of a normal user apparatus.

In another embodiment, the wireless parameter may be PUSCH (Physical Uplink Shared Channel), PUCCH (Physical Uplink Control Channel), and / or SRS (Sounding Reference Signal). For example, the radio parameter may specify a target reception power, a path loss compensation term, and / or a maximum transmission power in the open loop transmission power control of each channel of PUSCH, PUCCH, and / or SRS. In this way, by separately setting the transmission power parameters of the PUSCH, PUCCH, and / or SRS channels for the non-terrestrial user device, the user apparatus 100 in the connection state (RRC_CONNECTED state or the like) after the wireless connection is established On the other hand, the set transmission power parameter can be applied as an initial value.

In the above-described embodiment, the wireless control process for the user device 100 in the idle state has been described. In the following embodiment, the wireless control process for the user device 100 in the connected state after establishing the wireless connection will be described. Note that the radio control process for the user apparatus 100 in the connected state, which will be described later, may be executed after the radio control process for the user apparatus 100 in the idle state described above is applied, or the user apparatus in the idle state described above. The radio control process for 100 may be executed independently.

In one embodiment, the transmission / reception unit 120 measures a radio state between the user apparatus 100 and the base station 200, and sets a radio parameter for each type of user apparatus received from the base station 200 according to the measured radio state. You may choose. Specifically, the transmission / reception unit 120 measures indicators such as RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality) indicating path loss between the user apparatus 100 and the base station 200, and responds to the measurement result. Thus, the radio parameter for each type of user apparatus received from the base station 200 may be selected. For example, only when the RSRP of the serving cell is equal to or greater than a predetermined threshold and the difference in RSRP between the serving cell and the neighboring cell (same frequency) is equal to or smaller than the predetermined threshold, the transmitting / receiving unit 120 Wireless parameters for the placement type user equipment may be applied. Further, when the condition is satisfied or no longer satisfied, the transmission / reception unit 120 may report the measurement result to the base station 200 in the connected state. Further, at this time, the transmission / reception unit 120 may autonomously apply the radio parameters for the non-terrestrial deployment type user apparatus, or for the non-terrestrial configuration type user apparatus by higher layer signaling from the base station 200. Wireless parameters may be applied. In addition, when the above conditions are satisfied, the transmission / reception unit 120 may report the measurement result to the base station 200 only once, or thereafter report the measurement result to the base station 200 a predetermined number of times and / or periodically. May be. Further, the transmission / reception unit 120 may stop reporting the measurement result based on the report stop instruction from the base station 200. According to the present embodiment, when the above condition is satisfied and uplink interference is likely to occur, the occurrence of uplink interference is reduced by applying the radio parameters for the non-terrestrial user device, and the user device 100 It becomes possible to minimize the degradation of the throughput.

In another embodiment, the transmission / reception unit 120 may measure the altitude of the user apparatus 100 and select a radio parameter for each type of user apparatus received from the base station 200 according to the measured altitude. Specifically, only when the altitude of the user device 100 measured autonomously is equal to or greater than a predetermined threshold, the transmission / reception unit 120 may apply the radio parameters for the non-terrestrial user device. According to the present embodiment, when the user apparatus 100 is at an altitude equal to or higher than a predetermined threshold and uplink interference is likely to occur, the occurrence of uplink interference is suppressed by applying the radio parameters for the non-terrestrial user apparatus. It is possible to reduce the degradation of the throughput of the user apparatus 100 while minimizing it.

Here, the various threshold values described above may be preset values, broadcast values, or values set by higher layer signaling. Various threshold values may be set in advance from the viewpoint of ensuring operational flexibility while supporting the wireless control processing for the user device 100 in the idle state described above.

In the above-described embodiment, various parameters can be realized as flags that can be set to “0” or “1” (for example, the above-described Drone indicator), but the present invention is not limited to this. And may be set to multiple levels. For example, when parameters that can be set at a plurality of levels are used, radio parameters can be set according to position, altitude, and / or interference level. Similarly, the various threshold values described above may be set at a plurality of levels.

In addition, the specific parameter value managed by the parameter management unit 110 described above may be managed as rewritable capability information (UE category, UE capability, etc.), or when a plurality of parameter values are set. The parameter management unit 110 may be set to the corresponding parameter value. Generally, when the user apparatus 100 connects to the base station 200, the user apparatus 100 reports capability information to the base station 200, so the base station 200 does not query the core network for registration information of the user apparatus 100, The type of the user device 100 can be recognized.

Next, a wireless communication process between a specific type of user apparatus and a base station according to an embodiment of the present invention will be described with reference to FIG. FIG. 8 is a sequence diagram illustrating a wireless communication process between a specific type of user apparatus and a base station according to an embodiment of the present invention.

As shown in FIG. 8, in step S101, the base station (gNB) 200 transmits system information indicating radio parameters for each type of user apparatus. Specifically, the base station 200 broadcasts in the system information radio parameters for terrestrial-arranged user apparatuses, radio parameters for non-terrestrial-arranged user apparatuses and / or radio parameters for ordinary user apparatuses.

In step S102, the idle user apparatus 100 transmits a wireless connection request to the base station 200 according to the wireless parameter corresponding to the type of the user apparatus 100 from the received system information. That is, the user device 100 determines whether the user device 100 is a ground-arranged user device or a non-ground-arranged user device based on a preset type parameter. When the wireless connection request is transmitted to the base station 200 according to the wireless parameter for the terrestrial-arranged user apparatus, and the user apparatus 100 is a non-terrestrial user apparatus, the user apparatus 100 transmits the wireless connection request according to the wireless parameter for the non-terrestrial user apparatus Is transmitted to the base station 200. The radio parameter may be, for example, a parameter used in a random access procedure. Specifically, a RACH power ramping parameter, a Message 3 transmission power parameter, a parameter indicating a RACH radio resource, a RACH preamble format, and the like. Or a parameter indicating whether or not the RACH can be transmitted. Further, the radio parameter may be a transmission power parameter such as PUSCH, PUCCH and / or SRS.

In step S103, a wireless connection is established between the user apparatus 100 and the base station 200, and the user apparatus 100 shifts to a connected state. For example, immediately after establishment of the radio connection, the user apparatus 100 may continue to use the radio parameter corresponding to the user apparatus type until the UE is individually set from the base station 200.

In step S104, the base station 200 transmits control information including radio resources allocated for uplink transmission to the user apparatus 100. The control information may include new radio parameters for the user apparatus 100.

In step S105, the user apparatus 100 transmits an uplink radio signal according to the set radio parameter.

Note that the block diagram used in the description of the above embodiment shows functional unit blocks. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.

For example, the user apparatus 100 and the base station 200 according to an embodiment of the present invention may function as a computer that performs processing of the wireless communication method of the present invention. FIG. 9 is a block diagram illustrating a hardware configuration of the user apparatus 100 and the base station 200 according to an embodiment of the present invention. The above-described user apparatus 100 and base station 200 may be physically configured as a computer apparatus including a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007, and the like. .

In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configurations of the user apparatus 100 and the base station 200 may be configured to include one or a plurality of the apparatuses illustrated in the figure, or may be configured not to include some apparatuses.

Each function in the user apparatus 100 and the base station 200 is obtained by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs an operation, and communication by the communication apparatus 1004 or memory This is realized by controlling data reading and / or writing in the storage 1003 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, each component described above may be realized by the processor 1001.

Further, the processor 1001 reads programs (program codes), software modules, and data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the processing by each component of the user apparatus 100 and the base station 200 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, or may be realized similarly for other functional blocks. . Although the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the embodiment of the present invention.

The storage 1003 is a computer-readable recording medium such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. For example, each of the above-described components may be realized by the communication device 1004.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.

In addition, the user apparatus 100 and the base station 200 include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). Hardware may be configured, and a part or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.

The notification of information is not limited to the aspect / embodiment described in this specification, and may be performed by other methods. For example, notification of information includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Also, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.

Each aspect / example described in this specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), The present invention may be applied to a Bluetooth (registered trademark), a system using other appropriate systems, and / or a next generation system extended based on these systems.

The processing procedures, sequences, flowcharts, and the like of each aspect / example described in this specification may be switched in order as long as there is no contradiction. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.

The specific operation performed by the base station 200 in this specification may be performed by the upper node in some cases. In a network composed of one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station and / or other network nodes other than the base station (for example, Obviously, this can be done by MME or S-GW, but not limited to these. Although the case where there is one network node other than the base station in the above is illustrated, a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

Information etc. can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information or the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.

The determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).

Each aspect / example described in this specification may be used alone, in combination, or may be switched according to execution. In addition, notification of predetermined information (for example, notification of being “X”) is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.

Although the present invention has been described in detail above, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

Software, whether it is called software, firmware, middleware, microcode, hardware description language, or other names, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be interpreted broadly.

Further, software, instructions, etc. may be transmitted / received via a transmission medium. For example, software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission media.

The information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of

Note that the terms described in this specification and / or terms necessary for understanding this specification may be replaced with terms having the same or similar meaning. For example, the channel and / or symbol may be a signal. The signal may be a message. Further, the component carrier (CC) may be called a carrier frequency, a cell, or the like.

The terms “system” and “network” used in this specification are used interchangeably.

In addition, information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information. . For example, the radio resource may be indicated by an index.

The names used for the above parameters are not limited in any way. Further, mathematical formulas and the like that use these parameters may differ from those explicitly disclosed herein. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements (eg, TPC, etc.) can be identified by any suitable name, the various names assigned to these various channels and information elements are However, it is not limited.

The base station can accommodate one or a plurality of (for example, three) cells (also called sectors). When the base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can be divided into a base station subsystem (for example, an indoor small base station RRH: Remote). A communication service can also be provided by Radio Head). The term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein. A base station may also be called in terms such as a fixed station (fixed station), a NodeB, an eNodeB (eNB), an access point (access point), a femto cell, and a small cell.

A mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.

As used herein, the terms “determining” and “determining” may encompass a wide variety of actions. “Judgment”, “decision” can be, for example, calculating, computing, processing, deriving, investigating, looking up (eg, table, database or another (Searching in the data structure), and confirming (ascertaining) what has been confirmed may be considered as “determining” or “deciding”. In addition, “determination” and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as "determined" or "determined". In addition, “determination” and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.

The terms “connected”, “coupled”, or any variation thereof, means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements. The coupling or connection between the elements may be physical, logical, or a combination thereof. As used herein, the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples By using electromagnetic energy, such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.

The reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot depending on an applied standard.

As used herein, the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

Any reference to elements using designations such as “first”, “second”, etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.

“Means” in the configuration of each apparatus may be replaced with “unit”, “circuit”, “device”, and the like.

These terms are similar to the term “comprising” as long as “including”, “including”, and variations thereof, are used herein or in the claims. It is intended to be comprehensive. Furthermore, the term “or” as used herein or in the claims is not intended to be an exclusive OR.

The radio frame may be composed of one or a plurality of frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may further be composed of one or more slots in the time domain. A slot may further be composed of one or more symbols (OFDM symbols, SC-FDMA symbols, etc.) in the time domain. Each of the radio frame, subframe, slot, and symbol represents a time unit for transmitting a signal. Radio frames, subframes, slots, and symbols may be called differently corresponding to each. For example, in the LTE system, the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, etc. that can be used in each mobile station) to each mobile station. The minimum time unit for scheduling may be called TTI (Transmission Time Interval). For example, one subframe may be called a TTI, a plurality of consecutive subframes may be called a TTI, and one slot may be called a TTI. A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. In the time domain of the resource block, one or a plurality of symbols may be included, and one slot, one subframe, or a length of 1 TTI may be included. One TTI and one subframe may each be composed of one or a plurality of resource blocks. The structure of the radio frame described above is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, the number of symbols and resource blocks included in the slots, and the subframes included in the resource block The number of carriers can be variously changed.

As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the specific embodiment mentioned above, In the range of the summary of this invention described in the claim, various deformation | transformation・ Change is possible.

DESCRIPTION OF SYMBOLS 10 Radio communication system 100 User apparatus 110 Parameter management part 120 Transmission / reception part 200 Base station 210 System information management part 220 Communication control part

Claims

A user device,
A parameter management unit for managing parameters related to the user device;
A transceiver for transmitting and receiving radio signals to and from the base station;
Have
The parameter management unit has a type parameter indicating that the type of the user device is a specific type;
When the user apparatus is in an idle state, the transmission / reception unit applies a radio parameter corresponding to the specific type received from the base station.
The user apparatus according to claim 1, wherein the wireless parameter is a parameter used for a random access procedure.
The user device according to claim 1 or 2, wherein the type parameter is a parameter depending on one or both of position and height.
The transmitter / receiver measures a wireless state between the user apparatus and the base station, and selects a wireless parameter for each type of user apparatus received from the base station according to the measured wireless state. The user device according to any one of 1 to 3.
The said transmission / reception part measures the altitude of the said user apparatus, and selects the radio | wireless parameter for every classification of the user apparatus received from the said base station according to the said measured altitude. User equipment.
A base station,
A system information management unit for transmitting system information;
A communication control unit for controlling wireless communication with the user device;
Have
The system information management unit is a base station that transmits the system information indicating radio parameters for each type of user apparatus.
The base station according to claim 6, wherein the radio parameter is a parameter used for a random access procedure.
The base station according to claim 6 or 7, wherein the system information management unit further transmits system information indicating a flight availability parameter.