WO2019065369A1

WO2019065369A1 - User device and communication method

Info

Publication number: WO2019065369A1
Application number: PCT/JP2018/034473
Authority: WO
Inventors: 真平安川; 理一工藤; アナラゾリーグ; 倫己丸小
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2017-09-29
Filing date: 2018-09-18
Publication date: 2019-04-04
Also published as: JP2021010044A

Abstract

The user device has: a reception unit for receiving, from a communication parameter distribution server storing region-specific communication parameters to be used for D2D communications, communication parameters corresponding to the region in which the user device is located; a control unit for setting the received communication parameters; and a transmission unit for transmitting a packet addressed to another user device in accordance with the set communication parameters. The reception unit receives a packet from another user device in accordance with the set communication parameters.

Description

User apparatus and communication method

The present invention relates to a user equipment in a wireless communication system.

In LTE (Long Term Evolution) and LTE's successor systems (for example, LTE-A (LTE-Advanced), NR (New Radio) (also referred to as 5G)), user apparatuses communicate directly with each other without passing through a radio base station. A D2D (Device to Device) technique to be performed is being studied.

D2D reduces traffic between a user apparatus and a base station, and enables communication between user apparatuses even when the base station becomes incapable of communication in a disaster or the like.

D2D is D2D discovery (also referred to as D2D discovery, also referred to as D2D discovery) for finding another user apparatus that can communicate, and D2D communication for direct communication between user apparatuses (D2D direct communication, D2D communication, direct communication between terminals) It is divided roughly into () and so on. In the following, D2D communication, D2D discovery and the like are simply referred to as D2D when not distinguished from each other. Further, a signal transmitted / received by D2D is called a D2D signal.

Although 3GPP (3rd Generation Partnership Project) refers to D2D as "sidelink", the more general term D2D is used in this specification. However, in the description of the embodiment described later, sidelink is also used as needed.

Further, in 3GPP, it is studied to realize V2X (Vehicle to Everything) by extending the above-mentioned D2D function, and specification is advanced. Here, V2X is a part of ITS (Intelligent Transport Systems), and as shown in FIG. 1, V2V (Vehicle to Vehicle), which means a form of communication performed between vehicles, is installed at the side of vehicles and roads. V2I (Vehicle to Infrastructure), which means the form of communication performed with the Road-Side Unit (RSU), V2N (Vehicle to Infrastructure, means the form of communication performed between the car and the mobile terminal of the driver. It is a generic name of V2P (Vehicle to Pedestrian) which means a form of communication performed between a Nomadic device and a mobile terminal between a car and a pedestrian.

In Rel-14 of LTE, specifications regarding some functions of V2X are made (eg, Non-Patent Document 1). In the specifications, Mode 3 and Mode 4 are defined for resource allocation for V2X communication to the user apparatus. In Mode 3, transmission resources are dynamically allocated by DCI (Downlink Control Information) sent from the base station to the user apparatus. In Mode 3, SPS (Semi Persistent Scheduling) is also possible. In Mode 4, the user apparatus autonomously selects transmission resources from the resource pool.

In order to realize D2D, the user apparatus needs to set communication parameters necessary for D2D such as wireless parameters and authentication information in advance. Generally, such communication parameters are stored in the memory of the user device or in a Subscriber Identity Module (SIM) card (for example, Non-Patent Documents 2 and 3).

On the other hand, communication parameters required for D2D may differ depending on the region. If the communication parameters differ depending on the region, communication may not be established or performance may be degraded unless the communication parameters necessary for D2D are matched between the user apparatuses. For example, assuming that the user device is installed in a car, communication may not be established unless communication parameters corresponding to regulation in each country are used.

In view of the above, it is an object of the present invention to match communicative parameters between user apparatuses and realize interoperability or avoidance of performance deterioration when communication parameters required for D2D may differ depending on regions. Do.

According to the disclosed technology,
A receiving unit that receives communication parameters corresponding to the area where the user device is located from the communication parameter distribution server that stores communication parameters by area used for D2D;
A controller configured to set the received communication parameter;
A transmitter configured to transmit a packet addressed to another user apparatus according to the set communication parameter;
Have
The user apparatus is provided, wherein the receiving unit receives a packet from another user apparatus according to the set communication parameter.

According to the disclosed technology, when the communication parameters required for D2D may differ depending on the area, it is possible to match the communication parameters between the user apparatuses, and to realize interoperability or avoidance of performance degradation.

It is a figure for demonstrating V2X. It is a figure for demonstrating D2D. It is a figure for demonstrating D2D. It is a figure which shows the structural example of the radio | wireless communications system which concerns on embodiment. It is a figure for demonstrating the operation example 1 in the radio | wireless communications system which concerns on embodiment. It is a figure for demonstrating the operation example 2 in the radio | wireless communications system which concerns on embodiment. It is a figure which shows an example of a function structure of the user apparatus which concerns on embodiment. It is a figure which shows an example of a function structure of the communication parameter delivery server which concerns on embodiment. It is a figure which shows an example of a function structure of the base station which concerns on embodiment. It is a figure which shows an example of the hardware constitutions of the user apparatus which concerns on embodiment, a communication parameter distribution server, and a network apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments. For example, although the radio communication system according to the present embodiment assumes a system based on LTE, the present invention is not limited to LTE, and is applicable to other systems. In the present specification and claims, “LTE” corresponds not only to a communication method corresponding to Release 8 or 9 of 3GPP, but also to Release 10, 11, 12, 13, or Release 14 or later of 3GPP. It is used in a broad sense including the 5th generation (5G, NR) communication method.

Further, although the present embodiment is mainly directed to communication including V2X, the technology according to the present embodiment is not limited to V2X, and can be widely applied to D2D in general. Also, "D2D" includes V2X as its meaning. Moreover, the term "D2D" is not limited to LTE, but refers to communication between terminals in general. Further, the technology according to the present embodiment is applicable to both “D2D communication” and “D2D discovery”.

Also, unless otherwise specified, the "D2D signal" may be a data signal, an SCI, a discovery signal, or a combination of an SCI and a data signal. .

<Overview of D2D>
In the present embodiment, since D2D is a basic technology, first, an outline of D2D defined in LTE will be described. Also in V2X, it is possible to use the D2D technology described here, and the user apparatus in the present embodiment can transmit and receive D2D signals according to the technology.

As described above, D2D is broadly divided into "D2D discovery" and "D2D communication". For “D2D discovery”, as shown in FIG. 2A, a resource pool for a Discovery message is secured for each Discovery period, and the user apparatus transmits a Discovery message (discovery signal) in the resource pool. There are Type 1 and Type 2b in more detail. In Type 1, the user apparatus autonomously selects a transmission resource from the resource pool. In Type 2b, semi-static resources are allocated by higher layer signaling (for example, RRC signaling).

Also in “D2D communication”, as shown in FIG. 2B, resource pools for SCI (Sidelink Control Information) / data transmission are periodically secured. The user apparatus on the transmitting side notifies the receiving side of a resource for data transmission (PSSCH resource pool) or the like by SCI using a resource selected from the Control resource pool (PSCCH resource pool), and transmits data using the data transmission resource. There are Mode 1 and Mode 2 in more detail about "D2D communication". In Mode 1, resources are dynamically allocated by (E) PDCCH sent from the base station to the user apparatus. In Mode 2, the user apparatus autonomously selects transmission resources from the resource pool. The resource pool is notified by SIB or a predefined resource pool is used.

Also, as described above, Rel-14 has Mode 3 and Mode 4 in addition to Mode 1 and Mode 2. In Rel-14, it is possible to transmit SCI and data simultaneously (in one subframe) in resource blocks adjacent in the frequency direction. The SCI may be called SA (Scheduling Assignment).

In LTE, a channel used for "D2D discovery" is called PSDCH (Physical Sidelink Discovery Channel), and a channel for transmitting control information such as SCI in "D2D communication" is called PSCCH (Physical Sidelink Control Channel), and data The channel that transmits the channel is called PSSCH (Physical Sidelink Shared Channel). Also, PSCCH and PSSCH have a PUSCH-based structure, and are structured such that DMRS (Demodulation Reference Signal) is inserted.

<System configuration>
FIG. 3 is a diagram showing an example of configuration of a wireless communication system according to the present embodiment. As shown in FIG. 3, the wireless communication system according to the present embodiment has base stations (also called eNB) 10A and 10B, user apparatuses (also called UE) 20A to 20D, and a communication parameter distribution server 30. The wireless communication system supports D2D, and user apparatuses 20A to 20D can communicate directly without going through

base stations

10A or 10B. In D2D, one of the user devices 20A to 20D is the transmitting side and the other is the receiving side, but each of the user devices 20A to 20D has both the transmitting function and the receiving function. Hereinafter, the user devices 20A to 20D will be simply described as "user device 20" unless they are particularly distinguished. Similarly, when the

base stations

10A and 10B are not particularly distinguished, they are simply described as "base station 10."

The user apparatus 20 shown in FIG. 3 has a function of cellular communication as a user apparatus in LTE (in addition to existing LTE, LTE in a meaning including 5 G, NR, and so forth) and signal transmission / reception on the above-mentioned channel Includes D2D capabilities. Further, the user device 20 has a function of executing the operation described in the present embodiment, can set communication parameters for each area used for D2D, and can communicate according to the set communication parameters.

In a typical example of V2X, the user device 20 is an on-vehicle terminal mounted on a vehicle, but the user device 20 may be a terminal carried by a pedestrian or the like, or a terminal mounted on a drone or an aircraft.

Further, the base station 10 has a function of cellular communication as the base station 10 in LTE, and a function for enabling communication of the user apparatus 20 in the present embodiment.

The communication parameter distribution server 30 stores communication parameters by region used for D2D. For example, communication parameters by region are stored in a data storage connected to the communication parameter distribution server 30. The communication parameter distribution server 30 acquires position information of the user device 20 and distributes to the user device 20 communication parameters corresponding to the area where the user device 20 is located. The communication parameter distribution server 30 may be integrated into a single server or may be distributed to a plurality of servers. The communication parameter distribution server 30 may be a node in the core network or an application server.

Communication parameters in the present embodiment include wireless communication parameters used for D2D and other communication parameters. The wireless communication parameters used for D2D are, for example, (1) transmission and / or reception resource setting, synchronization setting, (2) transmission / reception bandwidth, (3) modulation and coding scheme (MCS), transmission mode, transmission power, retransmission It may include any one or more of transmission parameters such as parameters or transmission parameter candidates, (4) number of transmitting and receiving antennas, and (5) minimum reception performance indicating receiver type and the like. Also, the wireless communication parameters used for D2D communication may include the wireless communication parameters of (1) to (5) for each priority or packet type. Other communication parameters are mainly used in the application, (1) authentication information, (2) electronic certificate, (3) upper layer protocol message set (for example, which type of message set is used in applications such as V2X) Information indicating whether or not it can be included. The above communication parameters may be set in units of two-dimensional areas, or may be set in units of three-dimensional areas.

Hereinafter, although an operation example of the present embodiment will be described in detail, the user apparatus 20 and the communication parameter distribution server 30 can determine whether or not contract information or authentication of the user apparatus 20 applies the operation example of the present embodiment. It may be determined based on the information, or may be determined based on the traveling state of the user device 20 (for example, while traveling, stopping, operating the engine) or the like.

<Operation example 1>
First, an example in which the user device 20 requests the communication parameter distribution server 30 to distribute communication parameters and sets the communication parameters received from the communication parameter distribution server 30 will be described with reference to FIG. 4. FIG. 4 is a diagram for describing an operation example 1 in the wireless communication system according to the embodiment.

The user device 20A requests the communication parameter distribution server 30 set in advance to distribute communication parameters (S102). Similarly, the user device 20B also requests the communication parameter distribution server 30 set in advance to distribute communication parameters (S104). For example, the

user devices

20A and 20B may request the communication parameter distribution server 30 to distribute communication parameters using a preset IP address, an electronic certificate, or the like. The IP address, the electronic certificate, and the like of the communication parameter distribution server 30 to which the

user devices

20A and 20B are connected may be changed according to an instruction from the communication parameter distribution server 30 or a trusted organization.

Also, the

user devices

20A and 20B may limit the communication interface used for the distribution request of the communication parameter in order to improve the reliability. For example, the

user apparatuses

20A and 20B may request the delivery of communication parameters only via a specific Access Point Name (APN) of a specific wireless interface (for example, LTE).

The distribution request for communication parameters may include position information such as Global Positioning System (GPS) coordinates in order to identify the area where the user device is located. When the communication parameters are set in units of three-dimensional area, the measurement value of the barometer, position information representing altitude such as altitude information on the map may further be included.

Further, the distribution request for communication parameters includes information (for example, capability information of the user device) indicating communication parameters that can be handled by the user device in order to avoid the mismatch in setting of the communication parameters in the

user devices

20A and 20B. May be. The position information of the user device and the information indicating the communication parameters that can be supported by the user device may be transmitted to the communication parameter distribution server 30 separately from the communication parameter distribution request.

The

user devices

20A and 20B may request the communication parameter distribution server 30 to distribute communication parameters based on specific events in the

user devices

20A and 20B, respectively. For example, the

user devices

20A and 20B may request delivery of communication parameters at a preset date and time such as a late-night time zone in order to reduce network load. Also, for example, the

user devices

20A and 20B may request distribution of communication parameters when the

user devices

20A and 20B start up, when an application starts up, and the like. Also, for example, the

user devices

20A and 20B request the delivery of communication parameters when there is a specific vehicle state such as when the engine is stopped or the like when the side brake is pulled to avoid the influence of running. May be Also, for example, the

user devices

20A and 20B may request delivery of communication parameters when passing a preset place such as near a border, in order to reflect differences in parameters among countries. Also, for example, when

user apparatuses

20A and 20B receive broadcast information such as SIB (System Information Block), CBS (Cell Broadcast Service), ETWS (Earthquake and Tsunami Warning System) from a base station, delivery of communication parameters is performed. You may request it. The

user apparatuses

20A and 20B may perform reception setting for receiving communication parameters being multicast on a specific carrier based on broadcast information from the base station. Also, for example, the

user apparatuses

20A and 20B may receive notification to invalidate current communication parameters immediately or notification to invalidate after expiration of a timer according to broadcast information from the base station. As a result of the current communication parameters being invalidated, the

user devices

20A and 20B request the communication parameter distribution server 30 to distribute communication parameters.

The communication parameter distribution server 30 stores communication parameters by region used for D2D. The communication parameter distribution server 30 acquires position information of the

user devices

20A and 20B, and distributes communication parameters corresponding to the area where the

user devices

20A and 20B are located to the

user devices

20A and 20B (S106, S108).

Similar to the restriction of the communication interface from the

user devices

20A and 20B to the communication parameter distribution server 30, the communication parameter distribution server 30 also requests a distribution of communication parameters only via a specific APN of a specific wireless interface (for example, LTE). May not be accepted.

The communication parameter distribution server 30 requires the position information of the

user devices

20A and 20B, but the position information of the

user devices

20A and 20B may be explicitly included in the distribution request in steps S102 and S104, and the distribution request , And may be determined from the position of the base station to which the

user apparatuses

20A and 20B connect. Distribution of communication parameters may be performed by unicast, and may be performed by broadcast or multicast. In addition, a multicast is a system simultaneously transmitted to a plurality of user apparatuses, and is not limited to cellular communication. Also, broadcast may be considered as a form of multicast. As an example of multicast, it is defined in MBMS (Multimedia Broadcast / Multicast Service) defined in 3GPP, CBS (Cell Broadcast Service), ETWS (Earthquake and Tsunami Warning System) or SIB (System Information Block), DVB. It is defined in DVB-IPDC (Digital Video Broadcasting-Internet Protocol Datacast) or DVB-H (Digital Video Broadcasting-Handheld), JSR 272 defined in JCP, OMA BCAST (Browser and Content Broadcast), ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) is a one-segment standard, or there is a MediaFLO is a mobile terminal for multimedia broadcasting standard.

When the delivery of the communication parameter is performed by multicast, the user apparatus that has successfully received the communication parameter may report that to the communication parameter delivery server 30. The communication parameter distribution server 30 can improve the reliability by distributing communication parameters by unicast to user devices that do not report within a predetermined period.

In addition, the communication parameter distribution server 30 may set distribution conditions such as whether to distribute the communication parameter, the frequency of distributing the communication parameter, and the time of distributing the communication parameter for each area. The communication parameter distribution server 30 may distribute communication parameters when the set distribution conditions are met.

Further, the communication parameter distribution server 30 may set the valid period in the communication parameter, and may transmit a plurality of parameters having different valid periods to the

user devices

20A and 20B.

The

user devices

20A and 20B receive, from the communication parameter distribution server 30, communication parameters corresponding to the area where the

user devices

20A and 20B are located, respectively, and set the received communication parameters (S110, S112). The

user devices

20A and 20B set the received communication parameters when receiving the communication parameters that the user device can handle, and when the user devices receive the communication parameters that the user device can not handle, the received communication parameters You may discard without setting. When the

user devices

20A and 20B receive a plurality of communication parameters having different effective periods, the

user devices

20A and 20B may set effective communication parameters based on the current time such as the GPS time of the user device. Setting a valid communication parameter indicates that the communication parameter whose current time is within the valid period is to be validated.

The

user devices

20A and 20B perform D2D communication in accordance with the set communication parameters (S114). However, if the capability of the

user device

20A or 20B is insufficient, if a valid communication parameter is not set, or if there is an obstacle between the

user devices

20A and 20B, communication by D2D should be performed. There are cases where you can not Thus, when communication can not be performed according to the set communication parameter, the

user apparatus

20A or 20B may select another wireless communication scheme. The other wireless communication method may be a wireless communication method via a base station, a combination of D2D and a wireless communication method via a base station, or another wireless access method (RAT: Radio Access Technology). In addition, when communication can not be performed even if another wireless communication method is selected, still another wireless communication method may be selected. When another wireless communication method is selected, the

user device

20A or 20B notifies the communication parameter distribution server 30 or a network device (for example, the base station 10, a higher node, a device connected to another cellular network) to that effect. You may The communication parameter distribution server 30 or the network device can instruct the user devices around the

user device

20A or 20B which has selected another wireless communication scheme to select a corresponding wireless communication scheme. This indication may be performed by broadcast or multicast, for example.

Also, when the

user device

20A or 20B can perform communication by D2D according to the set communication parameters, the

user device

20A or 20B notifies the communication parameter distribution server 30 or the network device of that. It is also good. The communication parameter distribution server 30 or the network device can instruct the user devices around the

user device

20A or 20B to stop selection of another wireless communication scheme. This indication may be performed by broadcast or multicast, for example.

Also, the

user device

20A or 20B can use the capability of the wireless communication system that can be used, the interest in a specific wireless communication system (that is, the wireless communication system that the user device 20 wants to use preferentially), the transmission state or reception of communication by D2D The status may be reported to the communication parameter distribution server 30 or a network device.

<Operation example 2>
Next, referring to FIG. 5, the network device (for example, base station 10, upper node, device connected to another cellular network) receives communication parameters from communication parameter distribution server 30 and transmits it to user device 20. An example will be described. FIG. 5 is a diagram for describing an operation example 2 in the wireless communication system according to the embodiment. Hereinafter, points different from FIG. 4 will be described.

First, the network device acquires communication parameters from the communication parameter distribution server 30 in advance (S201). For example, the network device may periodically inquire the communication parameter distribution server 30 about the communication parameter, or the communication parameter distribution server 30 may distribute the latest communication parameter or notify of the presence or absence of the update.

Thereafter, the

user devices

20A and 20B request distribution of communication parameters from the network device (S202, S204). In the present embodiment, the

user devices

20A and 20B may request distribution of communication parameters from the network device based on communication events in the cellular network such as location registration. As described above, when the

user devices

20A and 20B request the network device to distribute the communication parameters instead of the communication parameter distribution server 30, it is possible to reduce the number of inquiries to the communication parameter distribution server 30, and the communication parameter distribution server 30. Can reduce the burden of Moreover, the amount of signaling can be reduced by associating the delivery request of the communication parameter with the communication event such as location registration.

The details of steps S202 and S204 are the same as steps S102 and S104, except that the communication parameter distribution request destination is the network device.

Thereafter, the network device acquires position information of the

user devices

20A and 20B are located to the

user devices

20A and 20B (S206, S208).

The details of steps S206 and S208 are the same as steps S106 and S108 except that the distribution source of the communication parameter is the network device.

Thereafter, as in steps S110 to S114, the

user devices

20A and 20B set communication parameters (S210, S212), and perform D2D communication according to the set communication parameters (S214).

<Device configuration>
Next, functional configuration examples of the user device 20, the communication parameter distribution server 30, and the network device that execute the processing operations described above will be described. The user device 20 and the communication parameter distribution server 30 may have all the functions described in the operation example 1 and the operation example 2 or may have the function of any of the operation examples. Also, the network device may have the function described in the operation example 2.

FIG. 6 is a diagram showing an example of a functional configuration of the user device 20. As shown in FIG. As shown in FIG. 6, the user device 20 includes an application unit 210, a communication processing unit 220, a data storage 230, and a communication parameter storage unit 240. The application unit 210 is a functional unit for providing services such as V2X, and includes a transmission packet generation unit 212, a reception packet processing unit 214, a communication parameter setting unit 216, and a wireless communication scheme selection unit 218. The communication processing unit 220 is a functional unit for providing wireless communication including a D2D function and a cellular function, and includes a packet shaping unit 222 and transmission / reception units 224-1 to 224-4 (hereinafter referred to as transmission / reception unit 224). Have. The number of transmission / reception units 224 can be set to one or more arbitrary numbers. The data storage 230 is a storage device in which information used by the application unit 210 (for example, map information, travel plan), a log output from the application unit 210 (for example, driving log, communication log) and the like are stored. The communication parameter storage unit 240 is a storage device (for example, a memory or a SIM card) for storing communication parameters. The functional configuration shown in FIG. 6 is merely an example. As long as the operation according to the present embodiment can be performed, the names of the function classifications and the function parts may be any names.

The transmission packet generation unit 212 generates a packet to be transmitted to another device to realize a service such as V2X, and outputs the generated packet to the communication processing unit 220. Regarding the setting of the communication parameter, the transmission packet generation unit 212 generates a packet for requesting distribution of the communication parameter, a packet for notifying a communication parameter that can be handled by the user device 20, and the like.

The received packet processing unit 214 processes a packet received from another device via the communication processing unit 220. Regarding the setting of the communication parameter, the reception packet processing unit 214 outputs the communication parameter to the communication parameter setting unit 216 when the communication parameter is received from the communication parameter distribution server 30 or the network device.

The communication parameter setting unit 216 stores the received communication parameters in the communication parameter storage unit 240, and sets valid communication parameters.

When communication can not be performed according to the set communication parameters, the wireless communication system selection unit 218 selects another wireless communication system.

The packet shaping unit 222 shapes the packet in accordance with the wireless communication scheme selected by the wireless communication scheme selection unit 218.

The transmitting and receiving unit 224 corresponds to, for example, different RATs, generates a radio signal from the packet output from the packet shaping unit 222 and transmits it, and generates a packet from the received radio signal to generate a packet shaping unit Output to 222. Note that D2D and communication via a base station may be realized by the same transmission / reception unit as long as the RAT is the same (for example, communication via sidelink in LTE and communication via eNB), and may be realized by different transmission / reception units.

FIG. 7 is a diagram showing an example of a functional configuration of the communication parameter distribution server 30. As shown in FIG. As shown in FIG. 7, the communication parameter distribution server 30 has a transmission / reception unit 310, a communication parameter notification unit 320, and a data storage 330. The functional configuration shown in FIG. 7 is merely an example. As long as the operation according to the present embodiment can be performed, the names of the function classifications and the function parts may be any names.

The transmitting and receiving unit 310 transmits packets addressed to the user device 20 and the network device, and receives packets from the user device 20 and the network device.

When the communication parameter notification unit 320 receives a request for distribution of communication parameters from the user device 20 or the network device, the communication parameter notification unit 320 acquires necessary communication parameters from the data storage 430 and notifies the user device 20 or the network device.

FIG. 8 is a diagram showing an example of a functional configuration of the network device. As described above, the network device is, for example, a device connected to the base station 10, the upper node, and another cellular network. As shown in FIG. 8, the network device includes a transmission / reception unit 410, a communication parameter notification unit 420, a data storage 430, and a communication parameter acquisition unit 440. The functional configuration shown in FIG. 8 is merely an example. As long as the operation according to the present embodiment can be performed, the names of the function classifications and the function parts may be any names.

The transmitting and receiving unit 410 transmits a packet addressed to the user device 20 and receives a packet from the user device 20.

When the communication parameter notification unit 420 receives a request for distribution of communication parameters from the user device 20, the communication parameter notification unit 420 acquires necessary communication parameters from the data storage 430 and notifies the user device 20 of the required communication parameters.

The communication parameter acquisition unit 440 acquires communication parameters from the communication parameter distribution server 30 and stores the communication parameters in the data storage 430.

<Hardware configuration>
The block diagrams (FIGS. 6 to 8) used in the description of the above embodiment show blocks in functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation means of each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically connected to a plurality of elements, or directly and two or more physically and / or logically separated devices. And / or indirectly (for example, wired and / or wirelessly) connected, and may be realized by the plurality of devices.

Further, for example, any of the user device 20, the communication parameter distribution server 30, and the network device in one embodiment of the present invention may function as a computer that performs the process according to the present embodiment. FIG. 9 is a diagram showing an example of the hardware configuration of the user device 20, the communication parameter distribution server 30, and the network device according to the present embodiment. The user device 20, the communication parameter distribution server 30, and the network device described above physically include a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be configured as

In the following description, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the user device 20, the communication parameter distribution server 30, and the network devices may be configured to include one or more of the devices shown by 1001 to 1006 shown in the figure, or some devices. It may be configured not to include.

Each function in the user device 20, the communication parameter distribution server 30, and the network device causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001, the memory 1002, etc. Communication and control of reading and / or writing of data in the memory 1002 and the storage 1003.

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.

Also, the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a 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 application unit 210 and the communication processing unit 220 of the user device 20 illustrated in FIG. 6 may be realized by a control program stored in the memory 1002 and operated by the processor 1001. Further, for example, the transmission / reception unit 310 and the communication parameter notification unit 320 of the communication parameter distribution server 30 illustrated in FIG. 7 may be realized by a control program stored in the memory 1002 and operated by the processor 1001. Also, for example, the transmission / reception unit 410, the communication parameter notification unit 420, and the communication parameter acquisition unit 440 of the network apparatus illustrated in FIG. 8 may be realized by a control program stored in the memory 1002 and operated by the processor 1001. The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done. 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 execute the process according to the embodiment of the present invention.

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

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the transmitting and receiving unit 224 of the user device 20 may be realized by the communication device 1004. Further, the transmission / reception unit 310 of the communication parameter distribution server 30, and the transmission / reception unit 410 and the communication parameter acquisition unit 440 of the network device 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, and the like) that receives 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 be integrated (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 by a single bus or may be configured by different buses among the devices.

In addition, the user device 20, the communication parameter distribution server 30, and the network device are respectively a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and an FPGA (field programmable). It may be configured to include hardware such as a Gate Array, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.

<Summary of Embodiment>
As described above, according to the present embodiment, according to the present embodiment, a user apparatus used in a wireless communication system that supports D2D, from a communication parameter distribution server that stores communication parameters by region used for D2D, A user having a receiving unit that receives a communication parameter corresponding to an area where the user device is located, a communication parameter setting unit that sets the received communication parameter, and a communication processing unit that communicates according to the set communication parameter. An apparatus is provided.

When the communication parameters required for D2D may differ depending on the area, the above user equipment can match the communication parameters between the user equipments, and can realize interoperability or avoidance of performance deterioration.

Furthermore, the communication parameter setting unit may request the communication parameter distribution server to distribute communication parameters based on a specific event in the user apparatus.

According to the above configuration, distribution of communication parameters can be associated with a specific event such as a specific time zone, vehicle condition, passage of a preset place, etc., and the load on the communication parameter distribution server can be reduced. The effects of driving can be avoided, and the differences in parameters according to regions can be reflected in a timely manner.

Further, the communication parameter setting unit transmits information indicating communication parameters that can be supported by the user device to the communication parameter distribution server, and receives communication parameters that can be supported by the user device from the communication parameter distribution server. The received communication parameters may be set.

According to the above configuration, it is possible to avoid inconsistencies in setting of communication parameters due to lack of capability of the user apparatus.

Further, the receiving unit receives, from the communication parameter distribution server, a plurality of communication parameters having different effective periods, and the communication parameter setting unit sets effective communication parameters based on the current time of the user apparatus. It is also good.

According to the above configuration, parameter settings of a plurality of user apparatuses can be simultaneously changed at a specific time, and for example, communication parameters can be simultaneously changed at a specific date and time, and day and night It is possible to change the communication parameters at once.

The user apparatus may further include a wireless communication scheme selection unit that selects another wireless communication scheme when communication can not be performed according to the set communication parameter.

According to the above configuration, even when communication can not be performed because of insufficient capability of the user device or unset communication parameters, communication between the user devices can be realized.

<Supplement of embodiment>
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various modifications, modifications, alternatives, and replacements. I will. Although specific numerical examples are used to facilitate understanding of the invention, unless otherwise noted, those numerical values are merely examples and any appropriate values may be used. The division of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. It may be applied to the matters described in (unless contradictory). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operations of multiple functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by multiple components. With regard to the processing procedures described in the embodiment, the order of processing may be changed as long as there is no contradiction. Although each device according to the present embodiment has been described using a functional block diagram for the convenience of processing description, such a device may be realized in hardware, software, or a combination thereof. The software operated by the processor of each device according to the embodiment of the present invention is random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, It may be stored on a CD-ROM, database, server or any other suitable storage medium.

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

Each aspect / embodiment described in the present specification is 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-Wide Band), The present invention may be applied to a system utilizing Bluetooth (registered trademark), other appropriate systems, and / or an advanced next-generation system based on these.

As long as there is no contradiction, the processing procedure, sequence, flow chart, etc. of each aspect / embodiment described in this specification may be reversed. For example, for the methods described herein, elements of the various steps are presented in an exemplary order and are not limited to the particular order presented.

The specific operation supposed to be performed by the base station 10 in this specification may be performed by the upper node in some cases. In a network configured of one or more network nodes having a base station 10, various operations performed for communication with the user apparatus 20 may be performed by the base station 10 and / or the base station 10 other than the base station 10. It will be clear that it may be performed by other network nodes, such as but not limited to MME or S-GW etc. Although the case where one network node other than the base station 10 has been described above is illustrated, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Each aspect / embodiment described in this specification may be used alone, may be used in combination, and may be switched and used along with execution.

The user equipment UE may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote communication device, a mobile subscriber station, an access terminal, a mobile terminal, by a person skilled in the art. It may also be called a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.

Base station 10 may also be referred to by those skilled in the art with NB (Node B), eNB (enhanced Node B), Base Station, gNB, or some other suitable terminology.

The terms "determining", "determining" as used herein may encompass a wide variety of operations. "Judgment", "decision" are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision”, etc. Also, "determination" and "determination" are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (Accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”. Also, "judgement" and "decision" are to be considered as "judgement" and "decision" that they have resolved (resolving), selecting (selecting), choosing (choosing), establishing (establishing), etc. May be included. That is, "judgment" "decision" may include considering that some action is "judged" "decision".

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

As long as "include", "including", and variations thereof are used in the present specification or claims, these terms are as used in the term "comprising". It is intended to be comprehensive. Further, it is intended that the term "or" as used herein or in the claims is not an exclusive OR.

Throughout the present disclosure, when articles are added by translation, such as, for example, a, an, and the in English, these articles are not clearly indicated by the context: May contain more than one.

Although the present invention has been described above in detail, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modifications and changes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description in the present specification is for the purpose of illustration and does not have any limiting meaning on the present invention.

This international application claims priority based on Japanese Patent Application No. 2017-190195 filed on September 29, 2017, and the entire content of 2017-190195 is incorporated into this international application.

REFERENCE SIGNS LIST 10 base station 20 user apparatus 30 communication parameter distribution server 210 application unit 212 transmission packet generation unit 214 reception packet processing unit 216 communication parameter setting unit 218 wireless communication method selection unit 220 communication processing unit 222 packet shaping unit 224 transmission / reception unit 230 data storage 240 Communication parameter storage unit 310 Transmission / reception unit 320 Communication parameter notification unit 330 Data storage 410 Transmission / reception unit 420 Communication parameter notification unit 430 Data storage 440 Communication parameter acquisition unit

Claims

A receiving unit that receives communication parameters corresponding to the area where the user device is located from the communication parameter distribution server that stores communication parameters by area used for D2D;
A controller configured to set the received communication parameter;
A transmitter configured to transmit a packet addressed to another user apparatus according to the set communication parameter;
Have
The user apparatus, wherein the receiving unit receives a packet from another user apparatus according to the set communication parameter.
The user apparatus according to claim 1, wherein the control unit requests the communication parameter distribution server to distribute communication parameters based on a specific event in the user apparatus.
The transmission unit transmits information indicating communication parameters that can be supported by the user device to the communication parameter distribution server.
The receiving unit receives, from the communication parameter distribution server, communication parameters that can be handled by the user apparatus,
The user apparatus according to claim 1, wherein the control unit sets the received communication parameter.
The receiving unit receives, from the communication parameter distribution server, a plurality of communication parameters having different effective periods,
The user apparatus according to any one of claims 1 to 3, wherein the control unit sets a valid communication parameter based on a current time of the user apparatus.
The user apparatus according to any one of claims 1 to 4, wherein the control unit selects another wireless communication scheme when communication can not be performed according to the set communication parameter.
Receiving communication parameters corresponding to the area where the user device is located from the communication parameter distribution server storing the communication parameters by area used for D2D;
Setting the received communication parameters;
Communicating according to the set communication parameters;
A communication method having: