JP2021010044A - User device and communication method - Google Patents

Abstract

To match communication parameters between user devices when communication parameters required for D2D can differ depending on regions, and secure interoperability or avoid performance deterioration.SOLUTION: A user device used in a wireless communication system supporting D2D includes: a reception unit that receives a communication parameter corresponding to a region where the user device is located from a communication parameter distribution server that stores the communication parameter for each region used for D2D; a communication parameter setting unit that sets the received communication parameter; and a communication processing unit that communicates according to the set communication parameter.SELECTED DRAWING: Figure 4

Description

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

In LTE (Long Term Evolution) and LTE successor systems (for example, LTE-A (LTE-Advanced), NR (New Radio) (also called 5G)), user devices communicate directly with each other without going through a radio base station. The D2D (Device to Device) technology to be performed is being studied.

D2D reduces the traffic between the user equipment and the base station, and enables communication between the user equipment even when the base station becomes unable to communicate due to a disaster or the like.

D2D includes D2D discovery (also referred to as D2D discovery) for finding other communicable user devices and D2D communication (D2D direct communication, D2D communication, direct communication between terminals) for direct communication between user devices. It is also roughly divided into. Hereinafter, when D2D communication, D2D discovery, etc. are not particularly distinguished, they are simply referred to as D2D. Further, a signal transmitted / received in D2D is called a D2D signal.

In 3GPP (3rd Generation Partnership Project), D2D is referred to as "sidelink", but in the present specification, D2D, which is a more general term, is used. However, in the description of the embodiment described later, sidelink is also used as needed.

Further, in 3GPP, it is considered to realize V2X (Vehicle to Everything) by expanding the above D2D function, and specification is being promoted. Here, V2X is a part of ITS (Intelligent Transport Systems), and as shown in FIG. 1, V2V (Vehicle to Vehicle), which means a communication mode performed between automobiles, is installed on the side of an automobile and a road. V2I (Vehicle to Infrastructure), which means a communication mode between a vehicle and a road-side unit (RSU), and V2N (Vehicle to), which means a communication mode between a car and a driver's mobile terminal. Nomadic device) and V2P (Vehicle to Vehicle), which means a communication mode between a car and a pedestrian mobile terminal.

In LTE Rel-14, some functions of V2X are specified (for example, Non-Patent Document 1). In this specification, Mode 3 and Mode 4 are defined with respect to resource allocation for V2X communication to a user device. In Mode3, transmission resources are dynamically allocated by DCI (Downlink Control Information) sent from the base station to the user equipment. In addition, SPS (Semi Persistent Scheduling) is also possible in Mode3. In Mode4, the user device autonomously selects a transmission resource from the resource pool.

3GPP TS 36.213 V14.2.0 (2017-03) 3GPP TS 36.331 V14.2.2 (2017-04) 3GPP TS 24.334 V14.0.0 (2016-12)

In order to realize D2D, the user device 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 the SIM (Subscriber Identity Module) card (for example, Non-Patent Documents 2 and 3).

On the other hand, the communication parameters required for D2D may differ from region to region. If the communication parameters differ depending on the region, communication may not be established or performance may deteriorate unless the communication parameters required for D2D are matched between the user devices. For example, assuming that the user device is installed in an automobile, there is a possibility that communication cannot be established unless the communication parameters corresponding to the regulations of each country are used.

In view of the above points, it is an object of the present invention to match communication parameters between user devices when the communication parameters required for D2D may differ depending on the region, and to secure interoperability or avoid performance deterioration. To do.

According to the disclosed technology, it is a user device used in a wireless communication system that supports D2D.
A receiver that receives communication parameters corresponding to the area where the user device is located from a communication parameter distribution server that stores communication parameters for each area used for D2D.
The communication parameter setting unit that sets the received communication parameters, and
A communication processing unit that communicates according to the set communication parameters
A user device having the above is provided.

According to the disclosed technology, when the communication parameters required for D2D may differ depending on the region, the communication parameters can be matched between the user devices, and interoperability can be ensured or performance deterioration can be avoided.

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 configuration example of the wireless communication system which concerns on embodiment. It is a figure for demonstrating operation example 1 in the wireless communication system which concerns on embodiment. It is a figure for demonstrating operation example 2 in the wireless communication system which concerns on embodiment. It is a figure which shows an example of the functional structure of the user apparatus which concerns on embodiment. It is a figure which shows an example of the functional structure of the communication parameter distribution server which concerns on embodiment. It is a figure which shows an example of the functional structure of the base station which concerns on embodiment. It is a figure which shows an example of the hardware configuration of the user apparatus, communication parameter distribution server and network apparatus which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 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, the wireless communication system according to the present embodiment assumes an LTE-compliant system, but the present invention is not limited to LTE and can be applied to other systems. In the present specification and claims, "LTE" corresponds not only to the communication method corresponding to 3GPP release 8 or 9, but also to 3GPP release 10, 11, 12, 13, or release 14 or later. It is used in a broad sense including the 5th generation (5G, NR) communication method.

Further, although the present embodiment mainly targets communication including V2X, the technology according to the present embodiment can be widely applied not only to V2X but also to D2D in general. Further, "D2D" includes V2X as its meaning. Further, the term "D2D" is not limited to LTE, and refers to general communication between terminals. Further, the technique according to the present embodiment can be applied to both "D2D communication" and "D2D discovery".

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

<Overview of D2D>
Since D2D is the basic technology in the present embodiment, first, the outline of D2D defined by LTE will be described. It should be noted that the D2D technology described here can also be used in V2X, and the user apparatus according to the present embodiment can transmit and receive D2D signals by the technology.

As already explained, D2D is roughly divided into "D2D discovery" and "D2D communication". As for "D2D discovery", as shown in FIG. 2A, a resource pool for the Discovery message is secured for each Discovery period, and the user device transmits the Discovery message (discovery signal) in the resource pool. More specifically, there are Type1 and Type2b. In Type 1, the user device autonomously selects a transmission resource from the resource pool. In Type2b, quasi-static resources are allocated by upper layer signaling (for example, RRC signal).

As for "D2D communication", as shown in FIG. 2B, a resource pool for SCI (Sidelink Control Information) / data transmission is periodically secured. The user device on the transmitting side notifies the receiving side of a data transmission resource (PSSCH resource pool) or the like by SCI with a resource selected from the Control resource pool (PSCCH resource pool), and transmits data with the data transmission resource. More specifically, there are Mode1 and Mode2 for "D2D communication". In Mode 1, resources are dynamically allocated by (E) PDCCH sent from the base station to the user equipment. In Mode2, the user device autonomously selects a transmission resource from the resource pool. For resource pools, SIB notifications or predefined resource pools are used.

Further, as already described, in Rel-14, in addition to Mode1 and Mode2, there are Mode3 and Mode4. In Rel-14, SCI and data can be transmitted simultaneously (in one subframe) in resource blocks adjacent in the frequency direction. In addition, SCI may be called SA (Scheduling Assistance).

In LTE, the channel used for "D2D discovery" is called PSDCH (Physical Sidelink Discovery Channel), and the channel for transmitting control information such as SCI in "D2D communication" is called PSCCH (Physical Sidelink Control Channel). The channel for transmitting the data is referred to as PSSCH (Physical Sidelink Shared Channel). Further, the PSCCH and the PSSCH have a PUSCH-based structure, and have a structure in which DMRS (Demodulation Reference Signal, demodulation reference signal) is inserted.

<System configuration>
FIG. 3 is a diagram showing a configuration example of the wireless communication system according to the present embodiment. As shown in FIG. 3, the wireless communication system according to the present embodiment includes base stations (also referred to as eNBs) 10A and 10B, user devices (also referred to as UEs) 20A to 20D, and a communication parameter distribution server 30. The wireless communication system supports D2D, and the user devices 20A to 20D can directly communicate with each other without going through the base station 10A or 10B. In D2D, one of the user devices 20A to 20D is the transmitting side and the other one is the receiving side, but the user devices 20A to 20D both have both a transmitting function and a receiving function. Hereinafter, when the user devices 20A to 20D are not particularly distinguished, they are simply described as "user device 20". Similarly, when base stations 10A and 10B are not particularly distinguished, they are simply described as "base station 10".

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

In a typical example of V2X, the user device 20 is an in-vehicle terminal mounted on a vehicle, but the user device 20 may be a terminal carried by a pedestrian or the like, or may be 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 of enabling communication of the user device 20 in the present embodiment.

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

The communication parameters in this 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 coding method (MCS), transmission mode, transmission power, and retransmission. It may include any one or more of transmission parameters such as parameters or candidates for transmission parameters, (4) the number of transmission / reception antennas, (5) the minimum reception performance indicating the receiver type, and the like. Further, the wireless communication parameters used for D2D communication may include the wireless communication parameters (1) to (5) for each priority or packet type. Other communication parameters are mainly used in applications, such as (1) authentication information, (2) digital certificates, (3) upper layer protocol message sets (eg, what kind of message set is used in applications such as V2X). It may contain any one or more of (information indicating whether or not the information is provided). The above communication parameters may be set in units of two-dimensional areas or may be set in units of three-dimensional areas.

Hereinafter, the operation example of the present embodiment will be described in detail, but the user device 20 and the communication parameter distribution server 30 determine whether or not the operation example of the present embodiment is applied by the contract information or authentication of the user device 20. The determination may be made based on information, or may be determined based on the running state of the user device 20 (for example, running, stopped, engine operating), and the like.

<Operation example 1>
First, with reference to FIG. 4, an example will be described in which the user apparatus 20 requests the communication parameter distribution server 30 to distribute the communication parameters and sets the communication parameters received from the communication parameter distribution server 30. FIG. 4 is a diagram for explaining 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 the communication parameter (S102). Similarly, the user apparatus 20B also requests the preset communication parameter distribution server 30 to distribute the communication parameters (S104). For example, the user devices 20A and 20B may request the communication parameter distribution server 30 to distribute the communication parameters by using a preset IP address, a digital certificate, or the like. The IP address, digital certificate, and the like of the communication parameter distribution server 30 to which the user devices 20A and 20B are connected may be changed by an instruction from the communication parameter distribution server 30 or a trusted organization.

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

The communication parameter distribution request may include position information such as GPS (Global Positioning System) coordinates in order to identify the area where the user device is located. When the communication parameter is set in units of three-dimensional areas, it may further include position information indicating altitude such as a measured value of a barometer and altitude information on a map.

Further, the communication parameter distribution request includes information indicating communication parameters that the user device can handle (for example, ability information of the user device) in order to avoid inconsistency in the setting of the communication parameters in the user devices 20A and 20B. It may be. The position information of the user device and the information indicating the communication parameters that the user device can handle 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 the communication parameters based on specific events in the user devices 20A and 20B, respectively. For example, the user devices 20A and 20B may request the delivery of communication parameters at a preset date and time such as a midnight time zone in order to reduce the network load. Further, for example, the user devices 20A and 20B may request the distribution of communication parameters at the time of starting the user devices 20A and 20B, at the time of starting the application, and the like. Further, for example, the user devices 20A and 20B request the delivery of communication parameters in a specific vehicle state such as when the side brake is applied or the engine is stopped in order to avoid the driving influence. You may. Further, for example, the user devices 20A and 20B may request the distribution of communication parameters when passing through a preset place such as near a border in order to reflect the difference in parameters depending on the country. Further, for example, the user devices 20A and 20B receive broadcast information such as SIB (System Information Block), CBS (Cell Broadcast Service), and ETWS (Earthquake and Tsunami Warning System) from the base station. You may request it. The user devices 20A and 20B may be set to receive communication parameters multicast by a specific carrier based on the broadcast information from the base station. Further, for example, the user devices 20A and 20B may receive a notification for immediately invalidating the current communication parameter or a notification for invalidating after the timer expires by the 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 the communication parameters.

The communication parameter distribution server 30 stores the communication parameters for each region used for D2D. The communication parameter distribution server 30 acquires the position information of the user devices 20A and 20B, and distributes the communication parameters corresponding to the areas where the user devices 20A and 20B are located to the user devices 20A and 20B (S106, S108).

Similar to the limitation 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 the 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. It may be received separately, or it may be determined from the position of the base station to which the user devices 20A and 20B are connected. The distribution of communication parameters may be performed by unicast, broadcast or multicast. Note that multicast is a method of transmitting to a plurality of user devices at the same time, and is not limited to cellular communication. Broadcast may also be considered as a form of multicast. As an example of multicast, MBMS (Multimedia Broadcast / Multicast Service) specified in 3GPP, CBS (Cell Broadcast Service), ETWS (Earthquake and Tsunami Broadcast) Standard Broadcast (Earthquake and Tsunami Broadcasting System) DVB-IPDC (Digital Video Broadcasting-Internet Protocol Datacast) or DVB-H (Digital Video Broadcasting-Handheld), JSR272 specified in JCP, BCAS Standard specified in OMA, BCAS Standard (BCAS) There are ISDB-T (Integrated Services Digital Video Broadcasting-Terrestrial) or MediaFLO, which is a multimedia broadcasting standard for mobile terminals.

When the communication parameter is distributed by multicast, the user apparatus that can correctly receive the communication parameter may report to that effect to the communication parameter distribution server 30. The communication parameter distribution server 30 can improve reliability by distributing communication parameters by unicast to a user device that has not been reported within a certain period of time.

Further, the communication parameter distribution server 30 may set distribution conditions such as whether or not to distribute the communication parameter, the frequency of distributing the communication parameter, and the time to distribute the communication parameter for each region. 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 a valid period for the communication parameter, or may transmit a plurality of parameters having different valid periods to the user devices 20A and 20B.

The user devices 20A and 20B receive communication parameters corresponding to the areas where the user devices 20A and 20B are located from the communication parameter distribution server 30, respectively, and set the received communication parameters (S110, S112). When the user device 20A and 20B receive a communication parameter that the user device can handle, the user device 20A and 20B set the received communication parameter, and when the user device receives a communication parameter that cannot be handled, the received communication parameter. It may be discarded without setting. Further, when the user devices 20A and 20B receive a plurality of communication parameters having different validity periods, the user devices 20A and 20B may set valid communication parameters based on the current time such as the GPS time of the user device. Note that setting a valid communication parameter indicates that the communication parameter whose current time is within the valid period is valid.

The user devices 20A and 20B perform D2D communication according to the set communication parameters (S114). However, D2D communication should be performed, such as when the capacity of the user devices 20A or 20B is insufficient, when valid communication parameters are not set, or when there is an obstacle between the user devices 20A and 20B. There are cases where it cannot be done. In this way, when communication cannot be performed according to the set communication parameters, the user device 20A or 20B may select another wireless communication method. The other wireless communication system may be a wireless communication system via a base station, a combined use of D2D and a wireless communication system via a base station, or another wireless access system (RAT: Radio Access Technology). Further, if communication cannot be performed even if another wireless communication method is selected, 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 the network device (for example, the base station 10, the upper node, or the 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 that has selected another wireless communication method to select the corresponding wireless communication method. This instruction may be given, for example, by broadcast or multicast.

Further, 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 to that effect. May be 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 selecting another wireless communication method. This instruction may be given, for example, by broadcast or multicast.

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

<Operation example 2>
Next, referring to FIG. 5, a network device (for example, a base station 10, a host node, or a device connected to another cellular network) receives a communication parameter from the communication parameter distribution server 30 and transmits it to the user device 20. An example of doing so will be described. FIG. 5 is a diagram for explaining an operation example 2 in the wireless communication system according to the embodiment. Hereinafter, the 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 for communication parameters, and the communication parameter distribution server 30 may distribute the latest communication parameters or notify the presence or absence of updates.

After that, the user devices 20A and 20B request the network device to deliver the communication parameters (S202, S204). In the present embodiment, the user devices 20A and 20B may request the network device to deliver the communication parameters based on the communication event in the cellular network such as the location registration. In this way, the user devices 20A and 20B request the network device to distribute the communication parameters instead of the communication parameter distribution server 30, so that the number of inquiries to the communication parameter distribution server 30 can be reduced, and the communication parameter distribution server 30 can be reduced. The load on the server can be reduced. In addition, the amount of signaling can be reduced by associating a communication parameter distribution request with a communication event such as location registration.

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

After that, the network device acquires the position information of the user devices 20A and 20B, and distributes the communication parameters corresponding to the areas where 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 those of steps S106 and S108, except that the distribution source of the communication parameters is the network device.

Hereinafter, similarly to steps S110 to S114, the user devices 20A and 20B set communication parameters (S210 and S212), and perform communication by D2D according to the set communication parameters (S214).

<Device configuration>
Next, a functional configuration example of the user device 20, the communication parameter distribution server 30, and the network device that execute the processing operations described so far 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 functions of any of the operation examples. Further, the network device may have the functions described in the operation example 2.

FIG. 6 is a diagram showing an example of the functional configuration of the user device 20. 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 method 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 a transmission / reception unit 224-1 to 224-4 (hereinafter referred to as a transmission / reception unit 224). Have. The number of transmission / reception units 224 can be set to any one or more. The data storage 230 is a storage device that stores information used by the application unit 210 (for example, map information, travel plan), logs output by the application unit 210 (for example, operation log, communication log), and the like. 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 only an example. Any name may be used for the function classification and the function unit as long as the operation according to the present embodiment can be executed.

The transmission packet generation unit 212 generates a packet to be transmitted to another device in order 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 the delivery of the communication parameter, a packet for notifying the communication parameter that the user apparatus 20 can handle, 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 received 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 parameter in the communication parameter storage unit 240, and sets a valid communication parameter.

The wireless communication method selection unit 218 selects another wireless communication method when communication cannot be performed according to the set communication parameters.

The packet shaping unit 222 shapes the packet according to the wireless communication method selected by the wireless communication method selection unit 218.

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

FIG. 7 is a diagram showing an example of the functional configuration of the communication parameter distribution server 30. 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 only an example. Any name may be used for the function classification and the function unit as long as the operation according to the present embodiment can be executed.

The transmission / reception unit 310 transmits a packet addressed to the user device 20 and the network device, and also receives a packet 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 the 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 the functional configuration of the network device. As described above, the network device is, for example, a device connected to a base station 10, a higher-level node, or 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 only an example. Any name may be used for the function classification and the function unit as long as the operation according to the present embodiment can be executed.

The transmission / reception unit 410 transmits a packet addressed to the user device 20 and also receives a packet from the user device 20.

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

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

<Hardware configuration>
The block diagrams (FIGS. 6 to 8) used in the description of the above embodiment show blocks of functional units. 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 in which a plurality of elements are physically and / or logically combined, or two or more devices physically and / or logically separated from each other directly and. / Or indirectly (eg, wired and / or wireless) may be connected and realized by these plurality of devices.

Further, for example, the user device 20, the communication parameter distribution server 30, and the network device according to the embodiment of the present invention may all function as computers that perform the processing 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 above-mentioned user device 20, communication parameter distribution server 30, and network device are physically computer devices including 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. It may be configured as.

In the following description, the word "device" can be read as a circuit, device, unit, or the like. The hardware configuration of the user device 20, the communication parameter distribution server 30, and the network device may be configured to include one or more of the devices shown by 1001 to 1006 shown in the figure, or some devices may be included. It may be configured without including it.

For each function in the user device 20, the communication parameter distribution server 30, and the network device, the processor 1001 performs an operation by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the communication device 1004 It is realized by controlling communication, reading and / or writing of data in the memory 1002 and the storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 into 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-described embodiment is used. For example, the application unit 210 and the communication processing unit 220 of the user apparatus 20 shown 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 shown in FIG. 7 may be stored in the memory 1002 and realized by a control program operated by the processor 1001. Further, for example, the transmission / reception unit 410, the communication parameter notification unit 420, and the communication parameter acquisition unit 440 of the network device shown in FIG. 8 may be stored in the memory 1002 and realized by a control program operated by the processor 1001. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be mounted on 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 is composed of, for example, a ROM (Read Only Memory), an EPROM (Erasable Program ROM), an EEPROM (Electrically Erasable Program ROM), a RAM (Random Access Memory), or a RAM (Random Access Memory). May be done. The memory 1002 may be referred to as 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, or the like that can be executed to perform the process according to the embodiment of the present invention.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disk ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, 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 containing memory 1002 and / or 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, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the transmission / reception 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, the transmission / reception unit 410 of the network device, and the communication parameter acquisition unit 440 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 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 outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, 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 composed of a single bus or may be composed of different buses between the devices.

Further, the user device 20, the communication parameter distribution server 30, and the network device are a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and a PLD (Programmable Logic Device), respectively. It may be configured to include hardware such as a Gate Array), and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented on at least one of these hardware.

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

When the communication parameters required for D2D may differ depending on the region, the above-mentioned user equipment can match the communication parameters between the user equipments, and can ensure interoperability or avoid performance deterioration.

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

According to the above configuration, the distribution of communication parameters can be associated with a specific event such as a specific time zone, vehicle condition, passage of a preset place, and the load on the communication parameter distribution server can be reduced. , It is possible to avoid the influence of driving, and it is possible to reflect the difference in parameters depending on the region in a timely manner.

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

According to the above configuration, it is possible to avoid inconsistency in the setting of communication parameters due to insufficient capacity of the user device.

Further, the receiving unit receives a plurality of communication parameters having different valid periods from the communication parameter distribution server, and the communication parameter setting unit sets valid communication parameters based on the current time of the user device. May be good.

According to the above configuration, it is possible to change the parameter settings of a plurality of user devices at a specific time at the same time. For example, the communication parameters can be changed all at once at a specific date and time, and day and night. It is possible to change the communication parameters all at once.

Further, the user device may further have a wireless communication method selection unit that selects another wireless communication method when communication cannot be performed according to the set communication parameters.

According to the above configuration, communication between user devices can be realized even when communication is not possible due to insufficient capacity of the user device or unset communication parameters.

<Supplementary form>
Although the embodiments of the present invention have been described above, the disclosed inventions are not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, substitutions, and the like. There will be. Although explanations have been given using specific numerical examples in order to promote understanding of the invention, these numerical values are merely examples and any appropriate value may be used unless otherwise specified. The classification 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 combination with another item. May apply (as long as there is no conflict) to the matters described in. The boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. With respect to the processing procedure described in the embodiment, the order of processing may be changed as long as there is no contradiction. For convenience of processing description, each device according to the present embodiment has been described using a functional block diagram, but such a device may be realized by hardware, software, or a combination thereof. The software operated by the processor included in each device according to the embodiment of the present invention is a random access memory (RAM), a flash memory, a read-only memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, respectively. It may be stored on a CD-ROM, database, server or any other suitable storage medium.

Further, the notification of information is not limited to the embodiment / embodiment described in the present specification, and may be performed by other methods. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Media Access) Signaling). It may be carried out by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRC Signaling Setup) message, an RRC connection reconfiguration (RRC Signaling Configuration) message, or the like.

Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered Trademarks), GSM®, CDMA2000, UMB (Ultra Mobile Band), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), It may be applied to systems utilizing Bluetooth®, other suitable systems and / or next-generation systems extended based on them.

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

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

Each aspect / embodiment described in the present specification may be used alone, in combination, or may be switched and used according to the execution.

The user device UE may be 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, etc. It may also be referred to as a wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

Base station 10 may also be referred to by one of ordinary skill in the art by NB (NodeB), eNB (enhanced NodeB), base station (Base Station), gNB, or some other suitable term.

As used herein, the terms "determining" and "determining" may include a wide variety of actions. “Judgment” and “decision” include, for example, judgment, calculation, computing, processing, deriving, investigating, searching up (for example, table). , Searching in a database or another data structure), ascertaining can be regarded as "judgment" or "decision". In addition, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include the fact that (for example, accessing the data in the memory) is regarded as "judgment" or "decision". In addition, "judgment" and "decision" are considered to be "judgment" and "decision" when they are resolved, selected, selected, established, compared, etc. Can include. That is, "judgment" and "decision" may include that some action is regarded as "judgment" and "decision".

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

As long as "include", "include", and variations thereof are used herein or in the claims, these terms are similar to the term "comprising". , Intended to be inclusive. Moreover, the term "or" as used herein or in the claims is intended not to be an exclusive OR.

Throughout this disclosure, if articles are added by translation, for example, a, an, and the in English, these articles are not explicitly indicated by the context to be otherwise. Can include more than one.

Although the present invention has been described in detail above, it is clear 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 modifications and modifications without departing from the spirit and scope of the present invention as defined by the claims. Therefore, the description herein is for purposes of illustration only and has no restrictive meaning to the present invention.

10 Base station 20 User device 30 Communication parameter distribution server 210 Application unit 212 Transmission packet generation unit 214 Received 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 (6)

A user device used in a wireless communication system that supports D2D.
A receiver that receives communication parameters corresponding to the area where the user device is located from a communication parameter distribution server that stores communication parameters for each area used for D2D.
The communication parameter setting unit that sets the received communication parameters, and
A communication processing unit that communicates according to the set communication parameters
User device with. The user device according to claim 1, wherein the communication parameter setting unit requests the communication parameter distribution server to distribute communication parameters based on a specific event in the user device. When the communication parameter setting unit transmits information indicating communication parameters that the user device can handle to the communication parameter distribution server and receives communication parameters that the user device can handle from the communication parameter distribution server, the communication parameter setting unit concerned. The user device according to claim 1 or 2, which sets the received communication parameters. The receiving unit receives a plurality of communication parameters having different validity periods from the communication parameter distribution server, and receives the communication parameters.
The user device according to any one of claims 1 to 3, wherein the communication parameter setting unit sets valid communication parameters based on the current time of the user device. The user device according to any one of claims 1 to 4, further comprising a wireless communication method selection unit that selects another wireless communication method when communication cannot be performed according to the set communication parameters. A communication method in a user device used in a wireless communication system that supports D2D.
A step of receiving communication parameters corresponding to the area where the user device is located from a communication parameter distribution server that stores communication parameters for each area used for D2D.
The step of setting the received communication parameters and
The step of communicating according to the set communication parameters and
Communication method with.

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