WO2016190013A1 - 移動体端末 - Google Patents
移動体端末 Download PDFInfo
- Publication number
- WO2016190013A1 WO2016190013A1 PCT/JP2016/062592 JP2016062592W WO2016190013A1 WO 2016190013 A1 WO2016190013 A1 WO 2016190013A1 JP 2016062592 W JP2016062592 W JP 2016062592W WO 2016190013 A1 WO2016190013 A1 WO 2016190013A1
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- WIPO (PCT)
- Prior art keywords
- communication
- terminal
- antenna
- reception level
- counterpart
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
- H04M1/72412—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories using two-way short-range wireless interfaces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/022—Selective call receivers
- H04W88/023—Selective call receivers with message or information receiving capability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
Definitions
- the present invention relates to a mobile terminal that can communicate with a base station.
- various communication terminals such as smartphones display a pictogram (hereinafter, also referred to as “antenna pict”) that visually represents the reception level of radio waves from an antenna on the display of the communication terminal.
- a pict a pictogram
- Patent Document 1 discloses an in-vehicle information terminal as a communication terminal capable of displaying the antenna picture.
- This in-vehicle information terminal can be connected to a base station via a mobile phone.
- the in-vehicle information terminal acquires the communication sensitivity between the mobile phone and the base station from the mobile phone.
- the in-vehicle information terminal detects the wireless communication sensitivity between the in-vehicle information terminal and the mobile phone.
- the in-vehicle information terminal generates an icon according to the communication sensitivity between the mobile phone and the base station, and selects a display color according to the radio communication sensitivity between the in-vehicle information terminal and the mobile phone. Two types of communication sensitivities are displayed in a common area with icons and display colors.
- terminal-to-terminal (D2D: device-to-device) communication is known in which terminals (terminals: User Equipment) communicate with each other without going through a base station (eNB: evolved NodeB). Inter-terminal communication is also called D2D Proximity Services (ProSe). Proximity Services is standardized in Release 12 of 3GPP (3rd Generation Partnership Project).
- the user of the mobile terminal capable of the above-described communication between terminals can immediately confirm the reception level of radio waves in communication with the base station by antenna pictogram, the user immediately confirms the reception level of radio waves in communication between terminals. It is not possible.
- the vehicle-mounted information apparatus of patent document 1 is not the structure which communicates directly with a base station.
- the present invention has been made in view of the above problems, and is capable of immediately confirming not only the reception level of radio waves in communication with a base station but also the reception level of radio waves in communication between terminals. To provide a terminal.
- the mobile terminal can perform inter-terminal communication.
- the mobile terminal includes a control unit and a display unit.
- the control unit includes a first antenna pictogram based on a reception level of a radio wave transmitted by a base station, and a second antenna pictogram based on a reception level of a radio wave transmitted by a first counterpart terminal in inter-terminal communication. Display on the display.
- the user of the mobile terminal can immediately confirm not only the radio wave reception level in communication with the base station but also the radio wave reception level in inter-terminal communication.
- FIG. 1 is a diagram for explaining a first aspect in a communication system 10;
- FIG. It is a figure for demonstrating the antenna pic of UE1 and UE2 in the state of FIG. It is a figure for demonstrating the antenna picture displayed on UE1 in the 1st situation shown in FIG. It is a figure for demonstrating the antenna picture of UE1.
- 3 is a diagram for explaining a second aspect in the communication system 10.
- FIG. It is a figure for demonstrating the antenna pic of UE1 in the state of FIG. 3 is a diagram for explaining a third aspect of the communication system 10.
- FIG. It is a figure for demonstrating the antenna picture of UE1 in the state of FIG.
- a mobile terminal (hereinafter referred to as “UE”) that constitutes a communication system will be described below.
- UE mobile terminal
- the same reference numerals are assigned to the same members. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
- examples of the UE include various communication terminals such as a smartphone, a tablet terminal, and a fablet terminal.
- the UE is limited to these configurations as long as it can perform communication with a base station (hereinafter referred to as “eNB”) and communication between terminals (hereinafter referred to as “D2D communication”). It is not a thing.
- eNB base station
- D2D communication communication between terminals
- FIG. 1 is a diagram for explaining a first aspect of the communication system 10.
- communication system 10 includes base station eNB 9, UE 1 that is a mobile station located within the communication range of eNB 9, and a D2D communication counterpart terminal of UE 1. It is comprised by UE2 which is.
- Each of UE1 and UE2 is a terminal capable of D2D communication.
- UE1 is located in a cell 900 configured by eNB9 (that is, in an in-coverage state). Therefore, UE1 can perform LTE (Long Term Evolution) communication with eNB9.
- UE2 is not located in cell 900 (that is, in an out-of-coverage state). Therefore, UE2 cannot perform LTE communication with eNB9. Further, UE1 and UE2 have started D2D communication with each other.
- each of UE1 and UE2 displays an antenna picture on the display part 300.
- FIG. 2 is a diagram for explaining antenna picts of UE1 and UE2 in the state of FIG.
- FIG. 2A is a diagram for explaining an antenna picture displayed in UE1.
- FIG. 2B is a diagram for explaining the antenna picture displayed in UE2.
- UE1 is the 1st antenna pict 319 (henceforth, based on the battery pict 311 showing a battery remaining charge, and the reception level (that is, radio wave strength) of the radio wave transmitted by eNB9. , Also referred to as “LTE antenna pict 319”) and a second antenna pict 312 (hereinafter referred to as “D2D antenna pict 312”) based on the reception level of the radio wave transmitted by the counterpart terminal (UE2 in this case) in D2D communication. Is also displayed on the display unit 300. Specifically, the UE 1 displays the battery pic 311, the D2D antenna pic 312, and the LTE antenna pic 319 on the status bar 310 displayed on the display unit 300.
- the UE1 is located in eNB9 as described above. Therefore, the LTE antenna picture 319 is in a display mode indicating that the radio wave can be received from the eNB 9. Moreover, UE1 is performing D2D communication with UE2. Therefore, the D2D antenna pict 312 is in a display mode indicating that radio waves can be received from a partner terminal of D2D communication.
- the LTE antenna pict 319 includes identification information for clearly indicating that the pict is for LTE communication.
- UE1 displays the character string “LTE” in the vicinity of a plurality of antenna bars.
- the D2D antenna pict 312 includes identification information for clearly indicating that the pict is for D2D communication.
- UE1 displays the character string “D2D” in the vicinity of a plurality of antenna bars.
- UE 2 displays battery pic 311, LTE antenna pic 319, and D2D antenna pic 312 on display unit 300. Specifically, the UE 2 displays the battery pic 311, the D2D antenna pic 312, and the LTE antenna pic 319 on the status bar 310 in the same manner as the UE 1.
- the LTE antenna picture 319 has a display form indicating that it is in a state where it cannot receive radio waves from the eNB 9 (out of service area).
- the UE 2 sets the color of the four bars included in the LTE antenna picture 319 to be white (that is, each of the four bars is displayed in white).
- the D2D antenna picture 312 has a display mode indicating that it can receive radio waves from a partner terminal of D2D communication, like the UE1.
- each of UE1 and UE2 can display LTE antenna picture 319 and D2D antenna picture 312 on display unit 300. Therefore, each user of UE1 and UE2 can immediately confirm not only the reception level of radio waves in communication with eNB 9, but also the reception level of radio waves in D2D communication.
- a UE that is in the eNB 9 and is performing D2D communication with another UE that is not in the eNB 9 is also referred to as an “owner UE”.
- owner UE a UE that is in the eNB 9 and is performing D2D communication with another UE that is not in the eNB 9
- UE1 corresponds to the owner UE.
- UE2 corresponds to the 1st other party terminal which is a D2D communication other party of UE1.
- Mode 1 that is the first operation mode is an operation mode in which radio resources allocated by the eNB are used to communicate with the counterpart UE.
- Mode 2 that is the second operation mode is an operation mode in which radio resources allocated by the owner UE itself are used to communicate with the counterpart UE.
- the owner UE allocates radio resources in a predetermined radio resource pool to D2D communication between the owner UE and the UE of the communication partner.
- the owner UE When the UE of the communication partner is in the cell where the owner UE is located, the owner UE operates in Mode1. In this case, the communication partner UE also operates in Mode1. On the other hand, when the communication partner UE is not located in the cell where the owner UE is located, the owner UE operates in Mode2. In this case, the communication partner UE also operates in Mode2.
- the owner UE is UE1.
- UE2 as the communication partner is not located in the cell 900 where UE1 is located. Therefore, each of UE1 and UE2 operates in Mode2. If UE2 is located in cell 900 where UE1 is located, each of UE1 and UE2 operates in Mode1.
- FIG. 3 is a diagram for explaining an antenna picture displayed on the UE 1 in the first aspect shown in FIG.
- UE1 displays battery pic 311, LTE antenna pic 319, and D2D antenna pic 312 ⁇ / b> A on display unit 300.
- UE1 displays D2D antenna picto 312A on status bar 310 instead of D2D antenna picto 312 (see FIG. 2A).
- UE1 is operating in Mode2. For this reason, UE1 displays in a state where information indicating that it is operating in Mode2 is included in the D2D antenna pict 312A. That is, the D2D antenna picture 312A includes information indicating that it is operating in Mode2. Typically, UE1 displays the abbreviation of Mode2 (in the case of FIG. 3, "M2") in the vicinity of a plurality of antenna bars. In this case, since the user of UE1 can confirm from the status bar 310 that UE1 is operating in Mode2, it can be seen that UE2 is not located in the cell 900 where UE1 is located. That is, the user of UE1 knows that UE2 is in an “Out-of-coverage” state.
- Mode2 in the case of FIG. 3, "M2”
- UE1 displays information indicating that it is operating in Mode1 in the D2D antenna picture 312A.
- UE1 displays the abbreviation of Mode1 (“M1” in the case of FIG. 3) in the vicinity of a plurality of antenna bars.
- M1 the abbreviation of Mode1
- UE2 is located in the cell 900 where UE1 is located. That is, the user of UE1 knows that UE2 is in the “In-coverage” state.
- UE1 when UE2 is located in cell 900 configured by eNB9, UE1 communicates with UE2 using radio resources allocated by eNB9 as an operation mode when executing D2D communication. Works with. Moreover, when UE2 is not located in the cell 900 which eNB9 comprises, UE1 operate
- antenna pictures displayed by the UE 1 in each of the case where the eNB configuring the cell where the UE 1 is located have the above function and the case where the eNB does not have the function will be described. That is, the antenna picture displayed by the UE 1 in each of the case where the eNB supports D2D communication and the case where the eNB does not support D2D communication will be described.
- the UE1 determines whether the eNB is compatible with D2D communication based on cell information included in the broadcast information transmitted from the eNB. Also, in the following, as an example, it is assumed that UE1 is in a cell configured by the eNB, and UE1 is the owner UE.
- FIG. 4 is a diagram for explaining the antenna pictogram of UE1.
- FIG. 4A is a diagram for explaining the antenna picture displayed by the UE 1 when the eNB is compatible with D2D communication.
- FIG. 4B is a diagram for explaining the antenna picture displayed by the UE 1 when the eNB does not support D2D communication.
- UE 1 displays battery pic 311, LTE antenna pic 319, and D2D antenna pic 312 on status bar 310 as in FIG. 2 (A).
- UE1 since UE1 represents the reception level in LTE communication, all or a part of the plurality of antenna bars constituting the LTE antenna picture 319 (in the case of FIG. 4A, four antenna bars) All) is a predetermined first color (for example, blue). In addition, since UE1 represents the reception level in D2D communication, all or part of the plurality of antenna bars constituting the D2D antenna pict 312 (in the case of FIG. 4A, of the four antenna bars) 3 antenna bars) are set to a predetermined first color (for example, blue). Note that UE1 sets the remaining one of the four antenna bars to white.
- a predetermined first color for example, blue
- UE 1 displays battery pic 311, LTE antenna pic 319, and D2D antenna pic 312 on status bar 310.
- all or part of the plurality of antenna bars constituting the LTE antenna picture 319 (FIG. 4 ( In the case of A), all four antenna bars) are set to a predetermined second color (for example, red) different from the first color.
- UE1 If the eNB 9 does not support D2D communication, the UE1 cannot start D2D communication with the UE2. For this reason, UE1 indicates that D2D communication is impossible, and therefore all of the plurality of antenna bars constituting the D2D antenna pict 312 (in the case of FIG. 4A, four antenna bars). Is white. Furthermore, UE1 includes a symbol (typically a cross) indicating that D2D communication is impossible in D2D antenna pict 312.
- the user of UE1 who is the owner UE starts D2D communication by checking the red LTE antenna pict 319 when the LTE antenna pict 319 is red (specifically, one or more antenna bars are red). You can judge what you can't do.
- the D2D antenna picture 312 may not be displayed. Even in this case, the user of UE1 can determine that the D2D communication cannot be started by checking the red LTE antenna picture 319.
- FIG. 5 is a diagram for explaining a second aspect of the communication system 10.
- communication system 10 includes eNB 9, UE 1, UE 2, and UE 3.
- UE1 is located in the cell 900 configured by the eNB9. On the other hand, each of UE2 and UE3 is not located in cell 900. D2D communication is established between UE1 and UE2. In addition, D2D communication is established between UE2 and UE3. Specifically, UE1 is in a state where communication with UE3 is possible via UE2. That is, UE1 uses UE2 as a repeater (hereinafter referred to as “relay”) for communication with UE3.
- relay a repeater
- UE1 corresponds to the owner UE.
- UE2 corresponds to a first counterpart terminal that is a D2D communication counterpart of UE1, and
- UE3 corresponds to a second counterpart terminal that is a D2D communication counterpart of UE2.
- FIG. 6 is a diagram for explaining the antenna picture of UE1 in the state of FIG. Referring to FIG. 6, UE1 displays battery pic 311, LTE antenna pic 319, and D2D antenna pics 312B and 313B on status bar 310.
- the D2D antenna picture 312B is an antenna picture based on the reception level of the radio wave transmitted by the UE 2 in the D2D communication.
- the D2D antenna pict 313B is an antenna pict about UE3.
- the D2D antenna pict 312B includes identification information for clearly indicating that the pict is for D2D communication.
- UE1 displays a D2D character string in the vicinity of a plurality of antenna bars.
- the D2D antenna pict 312B includes identification information for clearly indicating that it is related to UE2.
- UE1 displays the character string “UE2” in the vicinity of a plurality of antenna bars.
- the D2D antenna picture 312B includes information indicating the operation mode of the UE1.
- the D2D antenna pict 313B also includes various types of identification information, like the D2D antenna pict 312B.
- the UE 1 calculates the reception level of the radio wave transmitted by the UE 3 using the communication with the UE 3 via the UE 2 (hereinafter also referred to as “first method”).
- the UE 1 acquires the reception level of the radio wave transmitted by the UE 3 measured by the UE 2 from the UE 2 (hereinafter also referred to as “second method”).
- the UE1 displays the D2D antenna picture 313B based on the calculated or acquired reception level. Details of the first method and the second method will be described later.
- UE1 displays D2D antenna picture 313B in addition to D2D antenna picture 312B. Therefore, the user of UE1 knows that UE1 can communicate with UE3 via UE2.
- FIG. 7 is a diagram for explaining a third aspect of the communication system 10.
- communication system 10 includes eNB 9, UE 1, UE 2, UE 3, and UE 4.
- UE1 is located in the cell 900 configured by the eNB9.
- each of UE2, UE3, and UE4 is not located in cell 900.
- D2D communication has been established between UE1 and UE2.
- D2D communication is established between UE2 and UE3.
- D2D communication is established between UE1 and UE4.
- D2D communication is established between UE3 and UE4.
- UE1 is in a state where it can communicate with UE3 via UE2. Further, UE1 is in a state in which it can communicate with UE3 via UE4. That is, UE1 uses UE2 and UE3 as relays for communication with UE3.
- UE1 corresponds to the owner UE.
- UE2 corresponds to a first partner terminal that is a D2D communication partner of UE1
- UE4 corresponds to a third partner terminal that is a D2D communication partner of UE1 different from UE2
- UE3 is a D2D communication of UE2 and UE4.
- the second partner terminal corresponds to the partner.
- FIG. 8 is a diagram for explaining the antenna picture of UE1 in the state of FIG. Referring to FIG. 8, UE1 displays battery pic 311, LTE antenna pic 319, and D2D antenna pics 312B, 313B, and 314 on status bar 310. That is, UE1 is different from UE1 in FIG. 6 in that D2D antenna pict 314 is displayed.
- the D2D antenna pict 314 is an antenna pict based on the reception level of the radio wave transmitted by the UE 4 in the D2D communication.
- the D2D antenna pict 313B is an antenna pict about the UE3.
- UE1 uses UE2 as a relay and UE1 uses UE4 as a relay, based on the reception level calculated by the first method or acquired by the second method, based on the reception level of UE1.
- the D2D antenna pict 313B related to UE3 is displayed on the status bar 310.
- UE1 functions as a relay as well as UE3, which is a communication partner with which a user of UE1 desires data communication (that is, a UE described as a transmission destination in data transmitted by UE1).
- Antenna pictograms for UE 2 and 4 are displayed on status bar 310. Therefore, the user of UE1 can also know the reception level of the UE functioning as a relay.
- a communication partner that the user of UE1 desires to perform data communication is referred to as a “partner UE” and a UE functioning as a relay is referred to as a “relay UE”.
- the D2D antenna pictogram may not fit in the status bar 310.
- the owner UE (UE1 in the case of FIG. 9) hides the antenna picture relating to the relay UE. As a result, it is possible to prevent the occurrence of a situation in which the antenna picture of the counterpart UE is not displayed on the status bar.
- FIG. 9 is a diagram showing a case where UE1, which is the owner UE, hides the antenna pictogram related to the relay UE in a certain situation.
- UE1 which is the owner UE, hides the antenna pictogram related to the relay UE in a certain situation.
- D2D antenna pictures 312 ⁇ / b> B and 314 are not displayed. Thereby, the user of UE1 can visually recognize the antenna picture (that is, D2D antenna picture 313B) about UE3 which is the other party UE.
- UE2 has the following configuration.
- UE2 functioning as a relay displays an antenna picture based on the reception level of the radio wave transmitted by UE1 in D2D communication and an antenna picture based on the reception level of the radio wave transmitted by UE3 in D2D communication on the status bar of display unit 300. It is displayed on 310.
- the user of UE2 can visually recognize the reception level of radio waves in D2D communication between two different UEs.
- UE4 has the same effect as UE2.
- UE1 may display only the antenna pict having the highest reception level among the plurality of antenna picts related to the plurality of relay UEs. For example, in the case of the communication state similar to FIG. 8, UE1 may display only D2D antenna pic 312B among D2D antenna pics 312B and 314. In this case, the state of the status bar 310 in the UE 1 is the same as the state of the status bar 310 shown in FIG.
- FIG. 10 is a diagram for describing a functional configuration of UE1.
- UE1 includes a control unit (processor or the like) 110, a storage unit 120, a display unit (display or the like) 300, and a communication processing unit 140.
- the control unit 110 controls the overall operation of the UE1.
- the storage unit 120 stores an operating system, various application programs, and various data.
- the display unit 300 displays various images (screens).
- the communication processing unit 140 performs various processes (RF processing, baseband processing, etc.) for executing communication with an eNB such as the eNB 9 and D2D communication with another UE.
- the control unit 110 corresponds to a processor (typically, a CPU (Central Processing Unit)). Specifically, the control unit 110 is realized by a processor executing an operating system and an application program stored in the storage unit 120.
- the storage unit 120 corresponds to a memory.
- the memory is typically composed of ROM (Read Only Memory), RAM (Random Access Memory), flash memory, and the like.
- the display unit 300 corresponds to a display.
- the communication processing unit 140 includes a transmission unit 141 and a reception unit 142.
- the transmission unit 141 includes an LTE transmission unit 1411 and a D2D transmission unit 1412.
- the receiving unit 142 includes an LTE receiving unit 1421 and a D2D receiving unit 1422.
- the communication processing unit 140 is used for communication with the eNB and D2D communication with other UEs.
- the communication processing unit 140 executes communication with other devices based on a command from the control unit 110.
- the transmission unit 141 transmits data to the eNB and other UEs.
- the LTE transmission unit 1411 transmits data to the eNB.
- the D2D transmission unit 1412 transmits data to other UEs by D2D communication.
- the receiving unit 142 receives data from the eNB and other UEs.
- the LTE receiving unit 1421 receives data from the eNB.
- the D2D receiving unit 1422 receives data from other UEs by D2D communication.
- Control unit 110 includes a reception level measurement unit 111, a reception level determination unit 112, and a reception level measurement unit 113.
- the reception level measuring unit 111 periodically measures the reception level of the radio wave transmitted by the eNB 9.
- the reception level measurement unit 111 periodically measures the reception level of radio waves transmitted by the counterpart terminal (including the relay) in D2D communication.
- the reception level measuring unit 111 measures the reception level of the radio wave transmitted by the eNB 9 and the reception level of the radio wave transmitted by the UE 2.
- reception level measuring section 111 measures the reception level of radio waves transmitted by eNB 9 and the reception level of radio waves transmitted by each of UE 2 and UE 4.
- the reception level measurement of the radio wave transmitted from the eNB is performed by the reception level measurement unit 111 of the UE 1 measuring the reception quality (RSRP or the like) from the RS (Reference Signal) signal.
- RSRP Reference Signal
- UE1 communicates with other UEs such as UE2 using the band of the UL (Up Link) signal of UE. Therefore, the reception level measurement in the D2D communication is performed by the reception level measurement unit 111 of the UE 1 measuring the reception quality from the RS signal in the UL signal. Specifically, the reception level measurement unit 111 measures reception quality (such as RSRP) from RS signals transmitted from other UEs.
- reception quality such as RSRP
- UE1 used RSRP for the measurement of reception quality, other (RSRQ etc.) may be used if it represents reception quality.
- RSRP Reference Signal Received Power
- the RS is transmitted without being biased in terms of frequency and time, and is not affected by the amount of traffic.
- the RSRP is a value that is almost determined by the fixed installation conditions of the eNB such as the transmission power of the eNB, the direction and height of the antenna, and the measurement environment such as the distance from the eNB and an obstacle. Therefore, RSRP is used as a basic parameter for evaluating the reception level of radio waves from the eNB.
- the reception level determination unit 112 is a functional block for executing the above-described first method.
- UE1 when UE1 performs the 2nd method mentioned above instead of the said 1st method, UE1 should just be comprised so that a reception level acquisition part may be provided instead of the reception level determination part 112.
- FIG. The reception level acquisition unit will be described later.
- the reception level determination unit 112 determines (calculates) the reception level of the radio wave transmitted by the UE 3 using communication with the UE 3 via the UE 2. Specifically, when determining the reception level, the UE 1 executes processes (i), (ii), and (iii) using training signals as follows.
- UE1 that is the owner UE embeds a training signal in DL (Down Link) data addressed to UE3 that is the counterpart UE, and transmits the DL data via the relay UE2 or the like.
- UE3 inserts the training signal into the UL data as it is and transmits it. That is, UE3 loops back the training signal to UE1.
- the reception level determination unit 112 of the UE 1 calculates the appreciation rate of the training signal of the UE 3 and determines the reception level (reception quality) based on the calculated value. Specifically, the reception level determination unit 112 calculates the error rate by comparing the transmission of the training signal transmitted from the UE1 and the training signal received from the UE3 via the UE2, and the calculated value The reception level is determined based on the above.
- the reception level measurement unit 113 is used when the UE1 functions as a relay UE.
- the reception level measurement unit 113 is different from the first to third aspects described above. For example, when the UE 1 is performing D2D communication with an owner UE (not shown), the reception level measurement unit 113 receives radio waves transmitted from the owner UE. Measure the reception level.
- the reception level measurement unit 113 receives radio waves transmitted from the other relay UE. Measure the level.
- the reception level measurement unit 113 is sent from a UE located on the opposite side of the eNB in measuring a reception level of a radio wave sent from the UE located on the eNB side in a series of relay networks. This is different from the reception level measurement unit 111 that measures the reception level of radio waves.
- the control unit 110 displays the antenna picture for displaying the various reception levels on the display unit 300 according to the situation of the UE1. Specifically, the control unit 110 displays various antenna pictures shown in FIGS. 2A, 3, 4, 6, 8, and 9 on the display unit 300.
- the UEs 2, 3, and 4 have the same configuration as the UE 1, the functional configurations of the UEs 2, 3, and 4 are not repeatedly described here.
- UE1 etc. demonstrated and demonstrated the structure provided with the reception level determination part 112 as an example. That is, the configuration in which the UE 1 or the like executes the above-described first method has been described as an example.
- etc. Demonstrates the structure which performs the 2nd method mentioned above instead of the said 1st method.
- the second aspect see FIG. 5 will be described as an example.
- UE1 and the like include a reception level acquisition unit (not shown) instead of the reception level determination unit 112 as described above in order to execute the second method.
- UE2 which is a relay UE, measures the reception level of the radio wave transmitted from UE3. Furthermore, UE2 inserts the measured result (reception level) into data transmitted to UE1, and transmits the data to UE1.
- the reception level acquisition unit of the UE1 acquires the reception level of the counterpart UE3 by demodulating the data transmitted from the UE2. That is, the reception level acquisition unit acquires the reception level of the radio wave transmitted by UE3, measured by UE2, from UE2.
- the UE 1 can display the antenna picture relating to the UE 3 (D2D antenna picture 313B in FIG. 6) on the status bar 310.
- FIG. 11 is a flowchart for explaining the flow of processing in UE1.
- UE1 that is the owner UE starts preparation for D2D communication.
- UE1 judges whether eNB9 respond
- step S6 UE1 starts D2D communication with other UEs (for example, UE2 and UE4). If it is determined that they are not compatible (NO in step S4), in step S16, the UE 1 changes the color of the LTE antenna picture 319 from blue (first color) to red (second color).
- step S8 UE1 determines whether or not a relay UE is necessary when communicating with the counterpart UE. For example, UE1 determines whether or not a relay UE is necessary based on whether or not it can communicate with the counterpart UE (UE3 in the second and third aspects) via D2D communication without passing through another UE. to decide.
- step S18 the reception level of the UE that is the communication partner of the D2D communication (for example, UE2 in the first aspect) is measured.
- step S ⁇ b> 20 the UE 1 displays the LTE antenna pict and the D2D antenna pict on the status bar 310 displayed on the display unit 300. For example, in the first aspect, UE1 performs the display shown in FIG.
- step S10 the UE 1 determines the reception level of the counterpart UE using, for example, the first method described above. Or UE1 acquires the receiving level of the other party UE from relay UE using the 2nd method mentioned above.
- step S12 UE1 determines whether or not all D2D antenna pictures for the counterpart UE and relay UE can be displayed on status bar 310.
- step S14 UE1 displays the antenna pictograms of all UEs on status bar 310, for example, as shown in FIG. If it is determined that display is impossible (NO in step S12), in step S16, for example, as shown in FIG. 9, UE1 displays the antenna pictogram of only the counterpart UE for D2D communication as shown in FIG. To do.
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Abstract
Description
図1は、通信システム10における第1の局面を説明するための図である。図1を参照して、第1の局面においては、通信システム10は、基地局であるeNB9と、eNB9の通信範囲内に在圏している移動局であるUE1と、UE1のD2D通信相手端末であるUE2とによって構成されている。
以下、D2D用アンテナピクト表示についての第1の変形例について説明する。
上記においては、図1に示したeNB9がD2D通信に対応している場合を例に挙げて説明した。つまり、eNB9が、D2D通信のために、eNB9が構成するセルに在圏するUEに無線リソースを割り当てる機能を有する場合を説明した。
図5は、通信システム10における第2の局面を説明するための図である。図5を参照して、第2の局面においては、通信システム10は、eNB9と、UE1と、UE2と、UE3とによって構成されている。
図7は、通信システム10における第3の局面を説明するための図である。図7を参照して、第3の局面においては、通信システム10は、eNB9と、UE1と、UE2と、UE3、UE4とによって構成されている。
図8においては、リレーUEのアンテナピクトとして、UE1が、UE2に関するD2D用アンテナピクト312Bと、UE4に関するD2D用アンテナピクト314とを表示する構成を例に挙げて説明した。しかしながら、これに限定されるものではない。
図10は、UE1の機能的構成を説明するための図である。図10を参照して、UE1は、制御部(プロセッサ等)110と、記憶部120と、表示部(ディスプレイ等)300と、通信処理部140とを備えている。
制御部110は、受信レベル測定部111と、受信レベル判定部112と、受信レベル測定部113とを含む。以下、上述した第1の局面(図1)、第2の局面(図5)、および第3の局面(図7)を適宜参照して、説明する。
上記においては、UE1等が、受信レベル判定部112を備えた構成を例に挙げて説明した。すなわち、UE1等が、上述した第1の手法を実行する構成を例挙げて説明した。以下では、UE1等が、上記第1の手法の代わりに、上述した第2の手法を実行する構成を説明する。また、以下では、説明の便宜上、上記第2の局面(図5参照)を例に挙げて説明する。
図11は、UE1における処理の流れを説明するためのフローチャートである。図11を参照して、ステップS2において、オーナーUEであるUE1は、D2D通信の準備を開始する。ステップS4において、UE1は、eNB9から送られてくる報知情報に基づき、eNB9がD2D通信に対応しているか否かを判断する。
Claims (5)
- 端末間通信が可能な移動体端末であって、
制御部と、
表示部とを備え、
前記制御部は、基地局によって送信された電波の受信レベルに基づく第1のアンテナピクトグラムと、前記端末間通信において第1の相手端末によって送信された電波の受信レベルに基づく第2のアンテナピクトグラムとを、前記表示部に表示させる、移動体端末。 - 前記基地局が構成するセルに前記第1の相手端末が在圏する場合には、前記移動体端末は、前記端末間通信を実行する場合の動作モードとして、前記基地局により割り当てられた無線リソースを用いて前記第1の相手端末と通信する第1の動作モードで動作し、
前記基地局が構成するセルに前記第1の相手端末が在圏していない場合には、前記移動体端末は、前記動作モードとして、前記移動体端末によって割り当てられた無線リソースを用いて前記第1の相手端末と通信する第2の動作モードで動作し、
前記制御部は、前記動作モードが前記第1の動作モードおよび前記第2の動作モードのうちのいずれであるかを表す情報を、前記表示部に表示させる、請求項1に記載の移動体端末。 - 前記移動体端末は、前記第1の相手端末を介して、前記第1の相手端末との間で前記端末間通信を行なう第2の相手端末と通信し、
前記制御部は、
前記第1の相手端末を介した前記第2の相手端末との通信を利用して、前記第2の相手端末によって送信された電波の受信レベルを判定、あるいは、前記第1の相手端末によって測定された、前記第2の相手端末によって送信された電波の受信レベルを前記第1の相手端末から取得し、
前記判定または取得された受信レベルに基づく第3のアンテナピクトグラムを前記表示部に表示させる、請求項1または2に記載の移動体端末。 - 前記移動体端末は、前記第1の相手端末を介さずに、前記第2の相手端末との間で前記端末間通信を行なう第3の相手端末を介することによって、前記第2の相手端末と通信可能であって、
前記制御部は、前記端末間通信において前記第3の相手端末によって送信された電波の受信レベルに基づく第4のアンテナピクトグラムを、前記表示部にさらに表示させる、請求項3に記載の移動体端末。 - 端末間通信が可能な移動体端末であって、
制御部と、
表示部とを備え、
前記制御部は、前記端末間通信において第1の相手端末によって送信された電波の受信レベルに基づく第1のアンテナピクトグラムと、前記端末間通信において第2の相手端末によって送信された電波の受信レベルに基づく第2のアンテナピクトグラムとを、前記表示部に表示させ、
前記移動体端末は、前記第1の相手端末と前記第2の相手端末との間の通信を中継する、移動体端末。
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