WO2014103456A1 - 無線通信装置、通信システム、無線通信装置の制御方法およびプログラム - Google Patents
無線通信装置、通信システム、無線通信装置の制御方法およびプログラム Download PDFInfo
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- WO2014103456A1 WO2014103456A1 PCT/JP2013/076674 JP2013076674W WO2014103456A1 WO 2014103456 A1 WO2014103456 A1 WO 2014103456A1 JP 2013076674 W JP2013076674 W JP 2013076674W WO 2014103456 A1 WO2014103456 A1 WO 2014103456A1
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- communication device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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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
Definitions
- This technology relates to a wireless communication device.
- the present invention relates to a wireless communication device that transmits and receives data to and from another wireless communication device using wireless communication, a communication system, a method for controlling the wireless communication device, and a program that causes a computer to execute the method.
- each wireless communication device can communicate with a nearby wireless communication device without depending on a master station such as a control device.
- a master station such as a control device.
- the new wireless communication device can freely join the network. For this reason, the coverage of the network can be increased as the number of wireless communication devices increases in the vicinity.
- each wireless communication device can also transfer information exchanged with other wireless communication devices in a bucket-relay manner (so-called “so-called”). , Multi-hop relay).
- a network that performs multi-hop is generally known as a mesh network.
- This technology has been created in view of such a situation, and aims to efficiently perform wireless communication performed between a plurality of wireless communication devices.
- a first aspect of the present technology is a first communication mode in which wireless communication is performed with another wireless communication device existing within a predetermined range.
- a communication unit that transmits and receives data in at least one communication mode of the second communication mode that performs wireless communication with another wireless communication device that exists within a range wider than the predetermined range; When data is transmitted / received to / from the second wireless communication device via one or more other wireless communication devices in one communication mode, the second communication mode is set and the third condition is satisfied.
- a wireless communication apparatus including a control unit that performs control for detecting a wireless communication apparatus, a control method thereof, and a program that causes a computer to execute the method.
- the second communication mode is set and the predetermined condition is set. An effect of detecting the third wireless communication device that satisfies is brought about.
- the control unit when the third wireless communication device is detected, causes the third wireless communication device to replace the second wireless communication device in the first communication mode. You may make it control by connecting and performing data transmission / reception between the said 3rd radio
- the communication unit transmits and receives data to and from the second wireless communication device for receiving a first service provided by the second wireless communication device in the first communication mode.
- the control unit may detect a wireless communication device that provides the same service as the first service in the second communication mode as the third wireless communication device. As a result, transmission and reception of data for accepting the first service provided by the second wireless communication device in the first communication mode is performed with the second wireless communication device, and the same service as the first service in the second communication mode. It is possible to detect the wireless communication device that provides the third wireless communication device as a third wireless communication device.
- the communication unit performs transmission / reception of data for accepting the first service in the first communication mode with the second wireless communication device and one or a plurality of others.
- the data for receiving the second service provided by the fourth wireless communication device is transmitted / received to / from the fourth wireless communication device via the wireless communication device, and the control unit performs the first communication mode in the first communication mode.
- wireless communication apparatus which becomes a communication path
- data for receiving the first service in the first communication mode is transmitted / received to / from the second wireless communication device, and the fourth wireless communication device is connected via one or more other wireless communication devices.
- Data transmission / reception for accepting the second service to be provided is performed with the fourth wireless communication apparatus, and at least part of a communication path for data transmission / reception performed with the fourth wireless communication apparatus in the first communication mode.
- control unit may detect the third wireless communication device by setting the second communication mode at a predetermined timing. This brings about the effect
- control unit may set the second communication mode based on a set value of a timer. This brings about the effect
- control unit may set the second communication mode based on a communication state in the first communication mode. This brings about the effect
- control unit sets the second communication mode based on a remaining battery capacity for driving other wireless communication devices existing on the communication path in the first communication mode. You may make it set. Accordingly, there is an effect that the second communication mode is set based on the remaining capacity of the battery for driving another wireless communication device existing on the communication path in the first communication mode.
- control unit may set the second communication mode based on a movement state of another wireless communication device existing on a communication path in the first communication mode. Good. This brings about the effect
- the second aspect of the present technology provides a first communication mode in which wireless communication is performed with another wireless communication device existing within a predetermined range, and another wireless device existing within a range wider than the predetermined range.
- Comprising first to third wireless communication devices for transmitting and receiving data in at least one communication mode of a second communication mode for performing wireless communication with a communication device wherein the first wireless communication device comprises: In the first communication mode, when data is transmitted / received to / from the second wireless communication device via one or more other wireless communication devices, the second communication mode is set to satisfy a predetermined condition.
- a communication system that performs control for detecting the third wireless communication device, a control method thereof, and a program that causes a computer to execute the method.
- the first wireless communication device performs the second communication mode when data is transmitted to and received from the second wireless communication device via one or more other wireless communication devices in the first communication mode. Is set to detect the third wireless communication apparatus that satisfies the predetermined condition.
- FIG. 1st Embodiment of this art It is a figure showing an example of system configuration of communication system 100 in a 1st embodiment of this art. It is a block diagram which shows the internal structural example of the 1st radio
- FIG. 1 It is a figure which shows the example of a format of the beacon which each radio
- 3 is a sequence chart illustrating an example of communication processing between devices included in the communication system 100 according to the first embodiment of the present technology. It is a figure showing an example of a connection state in case the 1st radio communications equipment 200 in a 1st embodiment of this art receives a plurality of services from a plurality of radio communications equipment. It is a figure showing an example of transition of a display screen displayed on indicator 290 in a 1st embodiment of this art.
- FIG. 6 is a flowchart illustrating an example of a processing procedure of communication control processing of the first wireless communication device 200 according to the first embodiment of the present technology.
- First embodiment communication control: an example in which an optimal wireless communication device is detected by setting the second communication mode during execution of the first communication mode
- FIG. 1 is a diagram illustrating a system configuration example of a communication system 100 according to the first embodiment of the present technology.
- the communication system 100 includes a plurality of wireless communication devices (first wireless communication device 200, second wireless communication device 102, third wireless communication device 103,..., Thirteenth wireless communication device 113).
- Each wireless communication device (device) constituting the communication system 100 is, for example, a portable information processing device (for example, a smartphone, a mobile phone, a tablet terminal) or a fixed information processing device (for example, a printer, a personal computer). is there.
- ad-hoc communication ad-hoc network, and the like are known as communication methods for autonomously interconnecting with neighboring wireless communication devices.
- each wireless communication device can communicate with a nearby wireless communication device without depending on a master station (for example, a control device). Therefore, in the embodiment of the present technology, an ad hoc network will be described as an example of a communication method for autonomously interconnecting with a close proximity wireless communication device.
- the new wireless communication device can freely join the network.
- the wireless communication devices shown in FIG. 1 only the first wireless communication device 200, the second wireless communication device 102, the third wireless communication device 103,. Assume that you are participating. In this case, it is assumed that the ninth wireless communication device 109 to the thirteenth wireless communication device 113 are sequentially added. In this case, the coverage of the network can be increased as each of these wireless communication devices (adjacent wireless communication devices) increases. That is, as the ninth wireless communication device 109 to the thirteenth wireless communication device 113 are sequentially added, the network coverage can be increased.
- each wireless communication device can also transfer information exchanged between other wireless communication devices in a bucket relay manner.
- the first wireless communication device 200 can directly communicate with each of the second wireless communication device 102 to the fourth wireless communication device 104. It is assumed that direct communication is not possible.
- a range in which the first wireless communication device 200 can directly communicate (a transmission range when the first wireless communication device 200 is used as a reference) is shown as a transmission range 121.
- the transmission range 121 corresponds to the transmission range when the number of transfers (hops) is limited to one.
- the wireless communication devices capable of direct communication with the first wireless communication device 200 are the data of the first wireless communication device 200. Can be transferred to other wireless communication devices. Thus, by transferring the data in this way, the first wireless communication device 200 and the wireless communication device that cannot directly communicate with the first wireless communication device 200 can exchange information with each other. .
- the first wireless communication device 200 and the fifth wireless communication device 105 that cannot directly communicate with the first wireless communication device 200 are routed through the third wireless communication device 103 (or the fourth wireless communication device 104). Thus, it is possible to exchange information with each other.
- This method of transferring data to each other (so-called bucket relay) and delivering information to a distant wireless communication device is called a multi-hop relay.
- a network that performs multi-hop is generally known as a mesh network.
- FIG. 2 shows the configuration of such a wireless communication device that constitutes an ad hoc network or a mesh network.
- the transmission range in which the number of transfers (hops) is limited to two is defined as the transmission range 122 and the number of transfers (hops) is limited to three. This transmission range is indicated as a transmission range 123. Similarly, a transmission range in which the number of transfers (hops) is limited to four is indicated as a transmission range 124.
- FIG. 2 is a block diagram illustrating an internal configuration example of the first wireless communication device 200 according to the first embodiment of the present technology. Since the internal configuration of the other wireless communication device is the same as that of the first wireless communication device 200, only the first wireless communication device 200 will be described here, and the description of the other wireless communication devices will be omitted.
- the first wireless communication apparatus 200 includes antennas 211 and 212, a communication unit 220, an I / O (Input / Output) interface 230, a control unit 240, and a memory 250. These units are connected via a bus 260.
- the communication unit 220 includes a first modem 221 and a second modem 222.
- the first modem 221 is a module for transmitting and receiving radio waves via the antenna 211.
- the second modem 222 is a module for transmitting / receiving radio waves via the antenna 212. The relationship between the communication modes performed by the first modem 221 and the second modem 222 will be described in detail with reference to FIG.
- FIG. 3 is a diagram illustrating a relationship between the communication modes performed by the first modem 221 and the second modem 222 according to the first embodiment of the present technology.
- the first wireless communication device 200 includes a plurality of modems (the first modem 221 and the second modem 222), and each modem (the first modem 221 and the second modem 222) is wireless in a different communication mode. Communicate.
- the first modem 221 performs data transmission / reception in a first communication mode in which wireless communication is performed with another wireless communication device existing within a predetermined range.
- wireless communication is performed using radio waves (electromagnetic waves) using a high carrier frequency.
- the predetermined range is a range based on the position of the first wireless communication device 200, for example, and means a range in which the first modem 221 can transmit and receive data in the first communication mode.
- the other wireless communication device existing within the predetermined range is, for example, a wireless communication device that exists in the vicinity of the first wireless communication device 200 and is in communication with the first wireless communication device 200 in the first communication mode. It is assumed that the wireless communication apparatus is capable of transmitting and receiving data.
- the second modem 222 transmits and receives data in the second communication mode in which wireless communication is performed with another wireless communication device existing within a range wider than the predetermined range.
- wireless communication is performed using radio waves using a carrier frequency lower than the carrier frequency used in the first communication mode.
- the first communication mode and the second communication mode are communication modes in which signal transmission ranges are physically different.
- the second communication mode is a communication mode that can transmit a signal over a wider range than the first communication mode.
- FIG. 3 shows a relationship example between the first communication mode 225 and the second communication mode 226.
- the first communication mode can be a communication mode using UWB (Ultra Wide Band), and the second communication mode can be a communication mode using a 2.4 GHz wireless LAN (Local Area Network).
- the first communication mode can be a communication mode using NFC (Near Field Communication), and the second communication mode can be a communication mode using a 2.4 GHz wireless LAN.
- the communication unit 220 transmits and receives data in at least one of the first communication mode and the second communication mode.
- Each of the first communication mode and the second communication mode may be wireless communication using radio waves (electromagnetic waves), and at least one of them may be wireless communication using a medium other than radio waves.
- radio waves electromagnetic waves
- the first communication mode may be wireless communication performed using a magnetic field
- the second communication mode may be wireless communication performed using radio waves.
- wireless communication in a plurality of communication modes is realized by installing a plurality of modems.
- a wireless communication in a plurality of communication modes by mounting a single modem.
- Communication may be realized.
- wireless communication in a plurality of communication modes can be realized by changing operating parameters (for example, transmission power and reception sensitivity) of one modem.
- the I / O interface 230 illustrated in FIG. 2 is an interface with an external device such as a sensor / actuator that operates in conjunction with the first wireless communication device 200.
- 2 shows an example in which, for example, a movement detection unit 270, an operation reception unit 280, a display unit 290, and an audio output unit 295 are connected to the I / O interface 230 as external devices.
- FIG. 2 illustrates an example in which the movement detection unit 270, the operation reception unit 280, the display unit 290, and the audio output unit 295 are provided outside the first wireless communication apparatus 200. You may make it incorporate in the communication apparatus 200.
- the movement detection unit 270 detects the movement of the first wireless communication apparatus 200 by detecting the acceleration, movement, inclination, etc. of the first wireless communication apparatus 200.
- the data is output to the control unit 240 via the O interface 230.
- the movement detection unit 270 for example, an acceleration sensor, a gyro sensor, or GPS (Global Positioning System) can be used.
- the movement detection unit 270 calculates a movement distance (for example, a movement distance per unit time) of the first wireless communication apparatus 200 using position information (for example, latitude and longitude) detected using GPS. can do.
- the operation accepting unit 280 is an operation accepting unit that accepts an operation input made by the user, and outputs operation information corresponding to the accepted operation input to the control unit 240 via the I / O interface 230.
- the operation reception unit 280 is realized by, for example, a touch panel, a keyboard, and a mouse.
- the display unit 290 is a display unit that displays various types of information (for example, the display screen 300 illustrated in FIG. 7 and the display screens 310 and 320 illustrated in FIG. 10) based on the control of the control unit 240.
- a display panel such as an organic EL (Electro Luminescence) panel or an LCD (Liquid Crystal Display) panel can be used.
- the operation accepting unit 280 and the display unit 290 can be integrally configured using a touch panel that allows a user to input an operation by touching or approaching the finger with the display surface.
- the sound output unit 295 is a sound output unit (for example, a speaker) that outputs various sounds based on the control of the control unit 240.
- the control unit 240 controls each unit of the first wireless communication device 200 based on a control program stored in the memory 250. For example, the control unit 240 performs signal processing of transmitted / received information.
- the control unit 240 is realized by a CPU (Central Processing Unit). For example, when data transmission / reception is performed with another wireless communication device in the first communication mode, the control unit 240 sets a second communication mode and sets a new wireless communication device that satisfies a predetermined condition. Control to detect.
- a CPU Central Processing Unit
- the memory 250 is a memory that stores various information (for example, a control program) necessary for the first wireless communication apparatus 200 to perform a desired operation.
- the memory 250 stores various contents such as music contents and image contents (for example, moving image contents and still image contents).
- contents stored in the memory 250 can be provided to other wireless communication devices using wireless communication.
- the control unit 240 processes information read from the memory 250, a signal input from the I / O interface 230, and the like, and actually transmits the data. A lump (transmission packet) is generated. Subsequently, the control unit 240 outputs the generated transmission packet to the modem (the first modem 221 or the second modem 222). The modem (the first modem 221 or the second modem 222) converts the transmission packet into a communication system format or the like for actual transmission, and then converts the converted transmission packet to the antenna (antenna 211 or 212). Send to the outside.
- the modem the first modem 221 or the second modem 222
- the modem when receiving data using wireless communication, the modem (first modem 221 or second modem 222) receives a radio signal received via an antenna (antenna 211 or 212) from each modem. The received packet is extracted by signal processing performed by the receiver. Then, the control unit 240 interprets the extracted received packet. As a result of this interpretation, when it is determined that the data is to be held, the control unit 240 writes the data in the memory 250. On the other hand, when it is determined that the data is to be transferred to another wireless communication device, the control unit 240 transmits the data as a modem (first modem 221) as a transmission packet to be transferred to the other wireless communication device. ). If it is determined that the data should be transferred to the external actuator, the control unit 240 outputs the data from the I / O interface 230 to the outside (for example, the display unit 290).
- the signal transmission range is different between the first communication mode and the second communication mode. Further, as shown in FIG. 1, a case is assumed where 13 wireless communication devices of the first wireless communication device 200 and the second wireless communication device 102 to the 13th wireless communication device 113 are scattered. Further, it is assumed that the control unit 240 can change the restriction rule for the number of transfers of the multi-hop relay of the mesh network depending on the communication mode to be used.
- a case is assumed in which a one-time limit is set as a transfer number limit rule when using the first communication mode, and a transfer number limit rule is not set when using the second communication mode. To do. That is, in the first communication mode, wireless communication up to the transmission range 121 shown in FIG. 1 is possible, and in the second communication mode, wireless communication up to the transmission range 125 shown in FIG. 1 is possible.
- the first wireless communication device 200 when the first wireless communication device 200 performs wireless communication in the first communication mode, the first wireless communication device 200 can directly exchange signals with the adjacent second wireless communication device 102 to the fourth wireless communication device 104. it can. However, when the first wireless communication device 200 performs wireless communication in the first communication mode, the first wireless communication device 200 communicates with other wireless communication devices other than the adjacent wireless communication devices (second wireless communication device 102 to fourth wireless communication device 104). Signals cannot be exchanged directly between them. On the other hand, when the first wireless communication device 200 performs wireless communication in the second communication mode, the first wireless communication device 200 can directly exchange signals with the thirteenth wireless communication device 113 located far away.
- the first communication mode when the first communication mode is used, communication can be performed with low power consumption, and since signal interference does not occur far, communication resources can be efficiently and effectively used.
- a large number of multi-hop relays are required, and it is assumed that the efficiency is not high.
- the number of transfers is limited, it is assumed that information about a distant wireless communication device cannot be acquired in the first communication mode.
- the second communication mode when the second communication mode is used, power consumption increases and signal interference is wide-ranging, so that it is possible to communicate with a distant wireless communication device and easily obtain the overall state of a plurality of wireless communication devices. be able to.
- the first communication mode it is often possible to transmit only a narrowband signal in the second communication mode than in the first communication mode.
- FIG. 4 is a diagram illustrating a transmission example when each wireless communication device configuring the communication system 100 according to the first embodiment of the present technology transmits service discovery information.
- FIG. 4 shows an example in which a beacon (beacon signal) including service discovery information is transmitted periodically (or irregularly). Also.
- FIG. 4 shows an example of beacon transmission when the horizontal axis is the time axis. That is, FIG. 4 schematically shows beacons 141 to 143 that are sequentially transmitted in time series.
- the service discovery information is information used when discovering a service that can be provided by another wireless communication device, and is, for example, the own device service information 157 and the other device service information 158 shown in FIG.
- each wireless communication device constituting the communication system 100 notifies service discovery information (included in the beacon) to surrounding wireless communication devices periodically (or irregularly).
- service discovery information included in the beacon
- a configuration example of the beacon will be described in detail with reference to FIG.
- Example format of service discovery information are diagrams illustrating a format example of a beacon transmitted by each wireless communication device that configures the communication system 100 according to the first embodiment of the present technology.
- 5A shows a format example of the own device service information 157 included in the beacon information 153
- FIG. 5B shows a format example of the other device service information 158 included in the beacon information 153
- FIG. 6 shows an example of the contents of the service notification field included in the own device service information 157 and the other device service information 158.
- the beacon 150 includes a preamble 151, a header 152, and beacon information 153.
- the preamble 151 is information indicating the presence of a packet (beacon). That is, each wireless communication device constituting the communication system 100 can detect the presence of a beacon by receiving the preamble 151.
- the header 152 is arranged at a predetermined position of the packet and stores information on the packet (beacon) itself.
- the header 152 stores each piece of information (information about the packet (beacon) itself) such as a transmission source and a transmission destination, and a packet size. That is, each wireless communication device constituting the communication system 100 decodes and analyzes the header. By this analysis, each wireless communication device constituting the communication system 100 determines which wireless communication device is a signal transmitted to which wireless communication device, and what type of signal the signal is (a beacon). Whether or not).
- the beacon information 153 is information notified to each wireless communication device configuring the communication system 100. That is, each wireless communication device constituting the communication system 100 transmits information to be notified to other wireless communication devices in a beacon.
- beacon information 153 will be described in detail.
- the beacon information 153 includes time information 154, network ID 155, network attribute 156, own device service information 157, other device service information 158, and other information 159.
- the time information 154 is time information indicating the time when the beacon including this information is transmitted from the transmission source wireless communication apparatus.
- the network ID 155 is information indicating the ID of the network configured by the transmission source wireless communication apparatus.
- the network attribute 156 is information indicating the attribute of the network configured by the transmission source wireless communication apparatus.
- the own device service information 157 is information (self device service information) related to a service provided by the transmission source wireless communication device.
- the other device service information 158 is information (other device service information) related to a service provided by a wireless communication device existing around the transmission source wireless communication device.
- the own device service information 157 and the other device service information 158 correspond to service discovery information.
- Other information 159 is information other than the information described above.
- the own device service information 157 includes an element ID 160, a length 161, and information fields of service notification fields [0] to [N] 162.
- Element ID 160 is an element ID indicating that own device service information is stored.
- Length 161 is a Length indicating the length of the element of the own device service information.
- the service notification fields [0] to [N] 162 are configured by one or a plurality of service notification fields (for example, N).
- One service notification field is arranged for each service provided by the corresponding wireless communication device.
- three fields are arranged for a wireless communication apparatus that provides three services.
- the service notification fields [0] to [N] 162 include a service type 163, a content ID 164, a content attribute 165, ranking information 166, a cache recommendation 167, a clone order 168, and secondary distribution information 169. Stored. These pieces of information will be described in detail with reference to FIG.
- the other device service information 158 includes Element ID 170, Length 171, wireless communication device IDs [0] to [M] 172, and service notification fields [0] to [M] 173. Consists of information fields.
- the other device service information 158 stores basically the same information as the own device service information 157, but stores additional wireless communication device IDs [0] to [M] 172. Different. That is, Element ID 170 and Length 171 correspond to Element ID 160 and Length 161 shown in FIG.
- the wireless communication device IDs [0] to [M] 172 and the service notification fields [0] to [M] 173 are arranged as a pair for each service provided by the wireless communication device.
- Wireless communication device IDs [0] to [M] 172 are IDs for identifying corresponding wireless communication devices (for example, adjacent wireless communication devices). That is, the wireless communication device IDs [0] to [M] 172 are information indicating which wireless communication device is providing the service of the paired service notification field.
- the service notification fields [0] to [M] 173 are composed of one or a plurality of service notification fields (for example, M). Note that the service notification fields [0] to [M] 173 store information related to other wireless communication devices (that is, wireless communication devices other than the wireless communication device that transmits the beacon). The same as the service notification fields [0] to [N] 162 shown in FIG.
- the combination of wireless communication device IDs [0] to [M] 172 and service notification fields [0] to [M] 173 should be notified to the wireless communication device that transmits the beacon.
- the service type 163 is information for identifying the contents of the service (content distribution etc.).
- the service type 163 may include the number of times indicating how many times the service discovery information can be transferred. By including this number of times, it is possible to prevent service discovery information related to this service from being transferred beyond that number of times. Further, the wireless communication apparatus that has received the service discovery information can determine whether to enjoy the service specified by the service type 163 based on the information of the service type 163.
- the content ID 164 is an ID for specifying a service.
- the wireless communication device that transmits or receives the service discovery information manages that the service specified by the content ID 164 has been received based on the information of the content ID 164, and generates billing information or the like as necessary.
- the content attribute 165 is information indicating a bit capacity necessary for providing a service, a group that can enjoy the service, an authentication method that is necessary for enjoying the service, and the like.
- the group that can enjoy the service can be, for example, a friend of the user who owns the wireless communication device that provides the service (a wireless communication device possessed by the friend). In this case, it is possible to determine whether or not the wireless communication device belongs to the group by using an authentication method for identifying the friend.
- the wireless communication apparatus that has received the service discovery information can determine whether or not to enjoy the corresponding service based on the information of the content attribute 165.
- Ranking information 166 is information indicating whether the access frequency to the service (content) is high or low. Based on the information of the ranking information 166, the wireless communication device that transmits the service discovery information can determine whether the service discovery information should be notified to the next wireless communication device or how often the notification should be set. . The wireless communication apparatus that has received the service discovery information can determine whether or not the received content should be cached based on the information of the ranking information 166. For example, it is preferable to set the ranking information 166 so as to notify and enjoy a high ranking service.
- the cache recommendation 167 is information indicating the degree of recommendation of service cache (recommendation degree) for adjacent wireless communication devices. If the wireless communication device that transmits service discovery information has many accesses to the service and determines that this service should be provided to other wireless communication devices, the setting is made to increase the degree of recommendation. Further, the wireless communication device that has received the service discovery information can determine whether to receive the content and cache based on the information of the cache recommendation 167.
- the clone order 168 is information indicating how many times the service (content) is copied from the original, or how many times copying is permitted.
- the wireless communication apparatus that has received the service discovery information is controlled so that it cannot hold more copies than the number of times determined by the clone order 168.
- Secondary distribution information 169 is information indicating whether or not the wireless communication apparatus that has received the service discovery information may cache the service (content) and perform secondary distribution. Based on the information of the secondary distribution information 169, the wireless communication device that has received the service discovery information controls the service (content) cache and whether or not the secondary distribution is necessary.
- the surrounding wireless communication devices receive the beacon. Then, the second wireless communication device 102 to the fourth wireless communication device 104 can detect that the beacon is a beacon transmitted from the first wireless communication device 200 based on the received beacon header. Also, the second wireless communication device 102 to the fourth wireless communication device 104 grasp the services that the first wireless communication device 200 can provide by confirming the contents of the beacon information 153 included in the received beacon. Can do.
- the second wireless communication device 102 to the fourth wireless communication device 104 receive the beacon 150 transmitted from the first wireless communication device 200.
- the second wireless communication device 102 to the fourth wireless communication device 104 configure the network in the vicinity of the transmission source first wireless communication device 200 based on the network attribute 156 included in the received beacon 150. Can be detected.
- the network attribute is specified by the network attribute 156.
- the second wireless communication device 102 to the fourth wireless communication device 104 acquire information regarding various services that can be enjoyed via the first wireless communication device 200 based on the service notification field 162 included in the received beacon 150. can do.
- the second wireless communication device 102 to the fourth wireless communication device 104 receive service discovery information from the first wireless communication device 200
- the own wireless device operates as a relay station for the multihop relay. Accordingly, the second wireless communication device 102 to the fourth wireless communication device 104 can notify what service the first wireless communication device 200 can provide to the relay destination. That is, the service discovery information (the own device service information 157 and the other device service information 158) transmitted from the second wireless communication device 102 to the fourth wireless communication device 104 is partially provided from the first wireless communication device 200. Services will be included. Note that the information including the service provided from the first wireless communication apparatus 200 is the other apparatus service information 158.
- each wireless communication device can notify a surrounding wireless communication device of a service that can be provided by including service discovery information in a beacon that is periodically transmitted.
- each wireless communication device can detect a wireless communication device existing in the vicinity by receiving a beacon, and can also detect what service the wireless communication device discovered at the same time provides. it can.
- FIG. 7 is a diagram illustrating an example of the display screen (display screen 300) displayed on the display unit 290 according to the first embodiment of the present technology.
- the display screen 300 is a display screen for selecting a service desired by the user.
- the display screen 300 is displayed based on service discovery information (the own device service information 157 and the other device service information 158 shown in FIG. 5) transmitted from each wireless communication device constituting the communication system 100.
- a service 301 On the display screen 300, a service 301, a provider 302, a communication prediction 303, and a radio button 304 are displayed for each service. In addition, a confirmation button 305 and a return button 306 are displayed on the display screen 300.
- the service 301 displays services that the first wireless communication apparatus 200 can receive. This service is displayed based on, for example, service discovery information (service type 163 shown in FIG. 5).
- the provider 302 is a name representing a wireless communication device that provides a corresponding service. This name is, for example, in the service discovery information (the header 152 shown in FIG. 5 in the case of an adjacent wireless communication device, and the wireless communication device ID 172 shown in FIG. 5 in the case of other wireless communication devices). Displayed on the basis.
- the communication prediction 303 is a sign indicating a communication state predicted after receiving the corresponding service. This indicator is displayed based on, for example, the number of wireless communication devices existing in the communication path specified using the service discovery information, the degree of congestion, and the like.
- the radio button 304 is a radio button attached to each service, and when selected by a user operation, a black circle is added in a white circle.
- FIG. 7 shows a state where the image service provided by the seventh wireless communication apparatus 107 and the music service (audio service) provided by the fifth wireless communication apparatus 105 are selected.
- the confirmation button 305 is a button that is pressed when a service selected by a user operation is confirmed.
- the return button 306 is a button that is pressed when returning to the display screen displayed immediately before.
- FIG. 8 is a sequence chart illustrating an example of communication processing between devices included in the communication system 100 according to the first embodiment of the present technology.
- communication processing in the case where the first wireless communication apparatus 200 receives a service provided by the seventh wireless communication apparatus 107 by wireless communication in the first communication mode is shown in a simplified manner.
- the seventh wireless communication device 107 transmits service discovery information to each wireless communication device (including the first wireless communication device 200) (401 to 404). In this case, since the seventh wireless communication device 107 cannot directly exchange information with the first wireless communication device 200, service discovery information is transmitted via the fourth wireless communication device 104. In addition, for example, as shown in FIGS. 4 to 6, the service discovery information is included in a beacon and is transmitted regularly or irregularly.
- the first wireless communication apparatus 200 displays information on services that can be received by the first wireless communication apparatus 200 on the display unit 290 based on the received service discovery information. Display (405). Each information corresponding to the service discovery information received from another wireless communication device within a certain time is also displayed. For example, the display screen 300 shown in FIG. 7 is displayed.
- a selection operation for selecting a desired service on the display screen displayed on the display unit 290 (406). For example, on the display screen 300 shown in FIG. 8, a selection operation for selecting an image service (for example, an operation of pressing the confirm button 305 after checking the radio button 304) is performed.
- an image service for example, an operation of pressing the confirm button 305 after checking the radio button 304.
- the control unit 240 responds to the selection operation with a service request for requesting a service corresponding to the selection operation. (407 to 410).
- a selection operation for selecting an image service is performed on the display screen 300 shown in FIG. 7 (406).
- an image service request for requesting an image service corresponding to the selection operation is transmitted to the seventh wireless communication apparatus 107 corresponding to the selection operation (407 to 410).
- the image service request is transmitted via the fourth wireless communication apparatus 104. .
- the seventh wireless communication apparatus 107 provides the first wireless communication apparatus 200 with an image service corresponding to the received image service request (411 to 414). For example, when the image service is provision of an image (real-time image) taken by a camera built in or attached to the seventh wireless communication device 107, the real-time image is transmitted via the fourth wireless communication device 104. Are sequentially transmitted (411 to 414).
- FIG. 8 shows an example in which the user selects a desired service on a display screen displayed based on service discovery information received from another wireless communication apparatus.
- the user may select a desired service in advance before receiving the service discovery information. For example, a display screen from which the provider 302 and the communication prediction 303 are deleted from the display screen 300 shown in FIG. 7 is displayed, and the user can select a desired service (for example, an image service) on this display screen.
- a desired service for example, an image service
- FIG. 8 shows an example in which one service is selected and received, but it is also possible to select a plurality of services and receive the plurality of services from one or a plurality of wireless communication apparatuses. An example of this is shown in FIG.
- FIG. 9 is a diagram illustrating an example of a connection state when the first wireless communication device 200 according to the first embodiment of the present technology receives a plurality of services from a plurality of wireless communication devices.
- the system configuration shown in FIG. 9 is the same as that shown in FIG.
- each of the fifth wireless communication device 105 and the eighth wireless communication device 108 can provide a music service
- the seventh wireless communication device 107 can provide an image service. Is assumed.
- the image service is a service that provides, for example, an image (real-time image) captured by a camera built in or attached to the seventh wireless communication device 107 using wireless communication.
- the image service for example, the image content stored in the seventh wireless communication apparatus 107 may be a service that provides wireless communication.
- the user of the first wireless communication apparatus 200 desires to receive a service for viewing images while listening to music.
- each wireless communication device configuring the communication system 100 periodically announces the presence of the own device and the services that the own device can provide in the first communication mode. That is, service discovery information (included in the beacon) for notifying the presence of the own device and the services that the own device can provide is periodically transmitted. By receiving this service discovery information, each wireless communication device constituting the communication system 100 receives what service when communicating with any of the adjacent wireless communication devices. Can be detected.
- the service discovery information can notify the relay destination of what services can be provided by operating itself as a multi-hop relay relay station. . That is, each wireless communication device constituting the communication system 100 can provide any service to the relay destination by transmitting the service discovery information, so that the own device operates as a relay station of the multi-hop relay. Can be notified.
- the fifth wireless communication apparatus 105 sends service discovery information indicating that the own apparatus can provide a music service to adjacent wireless communication apparatuses (the third wireless communication apparatus 103, the fourth wireless communication apparatus 104, etc.). Send. Receiving this service discovery information, the third wireless communication device 103 sends service discovery information indicating that it can provide a music service as a relay station to the adjacent wireless communication device (first wireless communication device 200, fourth wireless communication device). Wireless communication device 104). Similarly, the seventh wireless communication device 107 and the eighth wireless communication device 108 also transmit service discovery information for notifying services that can be provided by the own device.
- the first wireless communication apparatus 200 can receive the music service from the fifth wireless communication apparatus 105 via the third wireless communication apparatus 103 by receiving the service discovery information from the third wireless communication apparatus 103. Can be detected. For example, as indicated by an arrow 131, the music service can be received from the fifth wireless communication apparatus 105 via the third wireless communication apparatus 103.
- the first wireless communication apparatus 200 receives image service from the seventh wireless communication apparatus 107 via the fourth wireless communication apparatus 104 by receiving service discovery information from the fourth wireless communication apparatus 104. It is possible to detect that Further, the first wireless communication apparatus 200 can receive the music service from the eighth wireless communication apparatus 108 via the fourth wireless communication apparatus 104 by receiving the service discovery information from the fourth wireless communication apparatus 104. You can detect what you can do.
- the first wireless communication device 200 identifies which communication path is used (which wireless communication device is routed) before starting communication with the fifth wireless communication device 105. For example, the first wireless communication device 200 exchanges communication route selection information with each adjacent wireless communication device based on a procedure according to a known communication route selection protocol.
- OLSR Optimized Link State Routing Protocol
- MAC Wireless LAN-Medium-Access Control
- PHY Physical-Layer
- the first wireless communication device 200 can detect that communication with the fifth wireless communication device 105 is possible without wasting wireless resources via the third wireless communication device 103. it can. For example, communication is possible without waste based on the minimum number of relay stations, the minimum transmission delay, and the minimum time to occupy the frequency channel for transmission. Can be detected.
- the information used in this detection is held inside each wireless communication device as communication path information, and when actually transmitting / receiving a packet, which radio is next to reach the final destination. It is referenced when searching whether to transmit to the communication device.
- the first wireless communication device 200 acquires valid communication path information up to the fifth wireless communication device 105 in the above-described procedure. Then, first wireless communication apparatus 200 transmits a packet addressed to fifth wireless communication apparatus 105 to third wireless communication apparatus 103 based on the acquired communication path information. The third wireless communication apparatus 103 that has received this packet transfers the received packet addressed to the fifth wireless communication apparatus 105 to the fifth wireless communication apparatus 105 based on the communication path information held therein.
- the creation of the communication path information described above may be performed for all wireless communication devices connected to the mesh network.
- the number of wireless communication devices existing in the network is extremely large, overhead due to control packets relating to creation of communication path information increases. Therefore, in order to reduce overhead due to control packets related to the creation of communication path information, for example, as described above, a limit can be set on the number of times each packet is transferred.
- the music service is received from the fifth wireless communication apparatus 105 via the third wireless communication apparatus 103 as indicated by an arrow 131.
- the image service is received from the seventh wireless communication apparatus 107 via the fourth wireless communication apparatus 104 as indicated by an arrow 132.
- each wireless communication apparatus receives a control signal as needed. There is a need to interact. That is, each wireless communication device (first wireless communication device 200, third wireless communication device 103 to fifth wireless communication device 105, and seventh wireless communication device 107) establishes and maintains a communication connection in the first communication mode. It is necessary to exchange control signals for performing at any time.
- FIG. 10 is a diagram illustrating a transition example of the display screen displayed on the display unit 290 according to the first embodiment of the present technology.
- FIG. 10a shows a display screen 310 that is displayed when an interrupt process (optimization process) is activated by a trigger for detecting an optimal communication path (activation trigger in the second communication mode).
- LTE Long Term Evolution
- 3G 3rd Generation
- communication costs are incurred when wireless communication is performed in the second communication mode.
- a message to that effect may be added to the display screen 310 and displayed. For example, “communication cost is 10 yen / minute” can be added to the display screen 310 and displayed.
- the first wireless communication device 200 uses wireless communication in the first communication mode, and other wireless communication devices (for example, the fifth wireless communication device 105 and the seventh wireless communication device 107). It is assumed that the service from is accepted.
- the control unit 240 of the first wireless communication device 200 sets the second communication mode at a predetermined timing and optimizes a communication path used for providing a service using wireless communication in the second communication mode. .
- This timing is when an interrupt is generated by the activation trigger in the second communication mode, and only in this case, connection in the second communication mode is attempted.
- an interrupt due to the start trigger of the second communication mode can be generated using a timer.
- the control unit 240 of the first wireless communication apparatus 200 is assumed to hold a timer.
- the control unit 240 sets a timer for starting the second communication mode. To do.
- this timer expires, a start trigger for the second communication mode is generated.
- the start cycle of the second communication mode (that is, the set value of the timer) will be described.
- the activation cycle of the second communication mode is changed according to the number of other wireless communication devices existing in the vicinity of the first wireless communication device 200 (for example, within a predetermined range with reference to the first wireless communication device 200). be able to.
- the number of other wireless communication devices existing around the first wireless communication device 200 is small with reference to the threshold, the activation cycle of the second communication mode can be set longer.
- the activation cycle of the second communication mode can be set short.
- the number of other wireless communication devices existing in the vicinity can be detected based on, for example, service discovery information received by the first wireless communication device 200.
- control unit 240 of the first wireless communication device 200 can set the second communication mode based on the set value of the timer.
- the control unit 240 of the first wireless communication apparatus 200 monitors the overhead amount of the control signal exchanged in the first communication mode. And the control part 240 can change the starting period of 2nd communication mode according to the amount of overhead of the control signal for the maintenance of the network in 1st communication mode. For example, the activation of the second communication mode can be started when the amount of overhead increases with the threshold as a reference.
- a start trigger for the second communication mode can be generated.
- the following specific examples (1) to (3) are assumed.
- the control unit 240 of the first wireless communication apparatus 200 monitors the line occupation rate in the first communication mode (how much the channel is occupied, etc.). Then, the control unit 240 determines that the communication capacity in the first communication mode is tight due to the congestion of the line and the like and cannot provide the desired service (or the risk arises). Generates an activation trigger for the second communication mode.
- any one of the relay device (wireless communication device that relays a service) and the service providing device (wireless communication device that provides a service) is a battery-driven wireless communication device.
- the service currently provided cannot be continued as the remaining battery level decreases. Therefore, for example, a wireless communication apparatus that may not be able to provide a service notifies a wireless communication apparatus existing in the vicinity that the apparatus itself may not be able to continue the service.
- the information to that effect is transferred by the multi-hop relay, and the wireless communication device that is enjoying the service can also acquire the information to that effect.
- information to that effect can be included in, for example, service discovery information.
- wireless communication apparatus which is enjoying the service produces
- the relay device or the service providing device is a highly portable wireless communication device (for example, a mobile device or a portable wireless communication device).
- the wireless communication apparatus moves from place to place, the currently used communication path may become invalid. Therefore, for example, a wireless communication device that may not be able to provide a service because the wireless communication device has moved from place to location indicates that the device itself may not be able to continue the service.
- movement of the wireless communication device (for example, movement of a threshold value or more) can be detected by a movement detection unit (corresponding to the movement detection unit 270 shown in FIG. 2).
- the information to that effect is transferred by the multi-hop relay, and the wireless communication device that is enjoying the service can also acquire the information to that effect.
- information to that effect can be included in, for example, service discovery information.
- wireless communication apparatus which is enjoying the service produces
- control unit 240 of the first wireless communication device 200 can set the second communication mode based on the communication state in the first communication mode.
- the control unit 240 of the first wireless communication device 200 sets the second communication mode based on the remaining capacity of the battery for driving other wireless communication devices existing on the communication path in the first communication mode. be able to.
- wireless communication apparatus 200 sets 2nd communication mode based on the movement state of the other radio
- the activation trigger for the second communication mode may be generated when a predetermined operation (for example, an operation for not selecting a service) is performed by the user.
- the first wireless communication device 200 is receiving a service (that is, a music service is received from the fifth wireless communication device 105 and an image service is received from the seventh wireless communication device 107. (Receiving state).
- the connection in the second communication mode is started by the activation trigger in the second communication mode.
- the control unit 240 of the first wireless communication apparatus 200 broadcasts the contents of the service currently accepted by the own apparatus using the second communication mode. As the contents of this service, it is notified that the music service is received from the fifth wireless communication apparatus 105 and the image service is received from the seventh wireless communication apparatus 107. Moreover, the control part 240 alert
- the eighth wireless communication apparatus 108 that has received this signal detects that its own apparatus can provide the same service as the service (music service) provided by the fifth wireless communication apparatus 105.
- the eighth wireless communication device 108 is set to provide a service to another device.
- the eighth wireless communication apparatus 108 is capable of providing a service (music service), and that the own wireless apparatus is adjacent to the seventh wireless communication apparatus 107 in the first communication mode. To the first wireless communication apparatus 200.
- the control unit 240 of the first wireless communication apparatus 200 recognizes that a desired service (music service) can be received from the eighth wireless communication apparatus 108.
- the first wireless communication apparatus 200 when the first wireless communication apparatus 200 receives a plurality of services, priority is given to the service provider having a common communication path, and the other connections are disconnected candidates. It can be.
- the first wireless communication apparatus 200 receives an image service provided from the seventh wireless communication apparatus 107 via the fourth wireless communication apparatus 104.
- the control unit 240 of the first wireless communication apparatus 200 determines that it is better to receive the music service from the eighth wireless communication apparatus 108 via the fourth wireless communication apparatus 104 and the seventh wireless communication apparatus 107. can do.
- the control unit 240 of the first wireless communication device 200 establishes a connection with the third wireless communication device 103 and the fifth wireless communication device 105. Judge that it is better to block. For this reason, the control unit 240 of the first wireless communication apparatus 200 extracts the third wireless communication apparatus 103 and the fifth wireless communication apparatus 105 as connection disconnection candidates.
- a communication path that has the shortest distance may be newly extracted.
- the control unit 240 of the first wireless communication device 200 establishes a connection with the eighth wireless communication device 108 using the first communication mode via the first modem 221. Subsequently, the first wireless communication device 200 changes to a service receiving state in which a music service is received from the eighth wireless communication device 108 via the fourth wireless communication device 104 and the seventh wireless communication device 107. Subsequently, the control unit 240 of the first wireless communication device 200 disconnects the connection between the third wireless communication device 103 and the fifth wireless communication device 105 using the first communication mode.
- FIG. 11 shows the state of the connection in the first communication mode that is arranged after the connection link in the first communication mode that is not necessary for providing the service is disconnected.
- FIG. 11 is a diagram illustrating an example of a connection state when the first wireless communication device 200 according to the first embodiment of the present technology receives a plurality of services from a plurality of wireless communication devices.
- the system configuration shown in FIG. 11 is the same as that shown in FIG.
- FIG. 10B shows a display screen 320 displayed when the service provider or the communication path is changed by the optimization process for changing to the optimal provider and the communication path.
- the display screen 320 is a display screen that is displayed after the optimization process is performed, and displays a service 321, a provider 322, a communication prediction 323, and a confirmation button 324.
- Service 321 displays a service for which optimization processing has been performed.
- the service 301 corresponds to the service 301 shown in FIG.
- the provider 322 is a name that represents a wireless communication apparatus that provided a service before the optimization process is performed and a wireless communication apparatus that provides a service after the optimization process is performed.
- the provider 322 corresponds to the provider 302 shown in FIG.
- the communication prediction 323 is a sign indicating a communication state predicted for the service before the optimization process is performed and a communication state predicted for the service after the optimization process is performed.
- the communication prediction 323 corresponds to the communication prediction 303 illustrated in FIG.
- the confirmation button 324 is a button that is pressed after confirming the contents of the display screen 320.
- FIG. 12 is a flowchart illustrating an example of a processing procedure of communication control processing of the first wireless communication device 200 according to the first embodiment of the present technology.
- FIG. 12 shows an example in which the user selects a desired service in advance.
- each wireless communication device constituting the communication system 100 transmits service discovery information using wireless communication in the first communication mode. Therefore, the control unit 240 receives service discovery information from each wireless communication device, and searches for a service that can be provided among services selected by the user based on the service discovery information (Ste S901). By this search, the first wireless communication device 200 can detect the service selected by the user.
- the first wireless communication device 200 detects that the image service can be received from the seventh wireless communication device 107 via the fourth wireless communication device 104. Further, it is detected that the music service can be received from the fifth wireless communication apparatus 105 via the third wireless communication apparatus 103.
- control unit 240 tries to establish a connection with each wireless communication device that provides the detected service and starts communication (step S902). .
- the control unit 240 causes the display unit 290 to display an image corresponding to the image service received from the seventh wireless communication device 107 via the fourth wireless communication device 104 (step S903). Further, for example, the control unit 240 causes the audio output unit 295 to output music corresponding to the music service received from the fifth wireless communication device 105 via the third wireless communication device 103 (step S903).
- control unit 240 determines whether or not the interrupt process is activated by the activation trigger in the second communication mode (step S904). If the interrupt process has not been activated, the process returns to step S901. On the other hand, when the interrupt process is activated (step S903), the optimization process is started.
- the optimization process is performed by exchanging information with a wireless communication device existing in the vicinity using wireless communication in the second communication mode.
- control unit 240 exchanges information with wireless communication devices (for example, all wireless communication devices shown in FIG. 9) that exist in the vicinity by using wireless communication in the second communication mode (steps). S905). Then, the control unit 240 performs an optimization process for confirming whether the provider and the communication path currently enjoying the image service and the music service are optimal (step S906). In this optimization process, it is confirmed whether or not there is a provider and a communication path that can more efficiently provide the same service as the currently enjoyed service (step S906).
- the eighth wireless communication apparatus 108 can provide the same music service as that of the fifth wireless communication apparatus 105.
- priority is given to a service provider having a common communication path, and other connections are set as disconnection candidates. It is preferable. Therefore, when the eighth wireless communication device 108 is discovered as a music service provider, the music service is also transmitted from the eighth wireless communication device 108 via the fourth wireless communication device 104 and the seventh wireless communication device 107.
- the control unit 240 can determine that it should be accepted.
- step S906 is an example of a first procedure described in the claims.
- step S906 is an example of a second procedure described in the claims.
- the control unit 240 establishes a connection with the eighth wireless communication apparatus 108 using the first communication mode via the first modem 221 (step S907). Subsequently, the first wireless communication device 200 changes to a service receiving state in which a music service is received from the eighth wireless communication device 108 via the fourth wireless communication device 104 and the seventh wireless communication device 107 (step S907). . Then, the control unit 240 disconnects the connection with the third wireless communication device 103 and the fifth wireless communication device 105 using the first communication mode (step S907).
- control unit 240 determines whether or not a network connection termination instruction has been issued (step S908), and if a network connection termination instruction has not been issued, the process returns to step S901. On the other hand, when an instruction to end the network connection is made (step S908), the operation of the communication control process is ended.
- the control unit 240 transmits and receives data to and from the fifth wireless communication device 105 and the seventh wireless communication device 107 via one or more other wireless communication devices in the first communication mode. If so, the second communication mode is set. Then, the control unit 240 detects the eighth wireless communication apparatus 108 that satisfies a predetermined condition in the second communication mode. In this case, the control unit 240 detects the eighth wireless communication apparatus 108 that provides the same service as the service provided by the fifth wireless communication apparatus 105 in the second communication mode. In addition, the control unit 240 detects the eighth wireless communication apparatus 108 that is a communication path in which at least a part of the communication path for data transmission / reception performed with the seventh wireless communication apparatus 107 in the first communication mode is common. .
- the control unit 240 connects to the eighth wireless communication device 108 instead of the fifth wireless communication device 105 in the first communication mode. After this connection, the control unit 240 transmits and receives data to and from the eighth wireless communication device 108 via one or more other wireless communication devices.
- the first wireless communication device 200 searches for a service using wireless communication in the first communication mode, enjoys the service, and rebuilds a connection using wireless communication in the second communication mode. Repeat each process regularly (or irregularly). Then, the provider and the communication path for receiving the optimum service with the minimum necessary resources are extracted.
- Example in which the two communication modes in which the limit on the number of transfers is changed are the first communication mode and the second communication mode.
- two communication modes having physically different signal transmission ranges are designated as the first communication mode and the second communication mode.
- two communication modes having different signal transmission ranges due to a change in the number of transfers of the multihop relay of the mesh network may be considered as a first communication mode and a second communication mode.
- the limit on the number of transfers of the multihop relay of the mesh network can be changed to be the first communication mode and the second communication mode.
- the communication mode in which the transfer number limit is 2 hops is the first communication mode
- the communication mode in which the transfer number limit is 3 hops or more is the second communication mode
- the first wireless communication apparatus 200 enjoys a service using wireless communication in the first communication mode.
- the number of transfers (hops) in the first communication mode is limited to 2 hops, a wireless communication device that can communicate with the first wireless communication device 200 even when a multihop relay is used. Limited. That is, as long as wireless communication in the first communication mode is used, the first wireless communication device 200 stores service discovery information of wireless communication devices farther than the fifth wireless communication device 105 and the seventh wireless communication device 107. I can't get it.
- the first wireless communication apparatus 200 starts connection using wireless communication in the second communication mode (corresponding to step S905 shown in FIG. 12).
- the first wireless communication device 200 exists in a range that exceeds the limit on the number of transfers (hops) in the first communication mode.
- Service discovery information of the wireless communication device can be acquired.
- the first wireless communication device 200 notifies the fifth wireless communication device 105 and the seventh wireless communication device 107 that are currently providing services of the content that the device itself is enjoying. .
- the contents are notified that the music service is received from the fifth wireless communication apparatus 105 and the image service is received from the seventh wireless communication apparatus 107.
- the other wireless communication devices providing the same service are connected to the respective wireless communication devices (service provider and relay device (second wireless communication device 102 to fifth wireless communication device 105, seventh wireless communication device).
- An inquiry is made as to whether it exists in the vicinity of the communication device 107).
- the seventh wireless communication device 107 that has received this inquiry has detected that the eighth wireless communication device 108 adjacent to the seventh device is providing the same music service. It returns to the wireless communication apparatus 200.
- the first wireless communication apparatus 200 recognizes from the reply that it can receive service from the eighth wireless communication apparatus 108 (corresponding to step S906 shown in FIG. 12).
- the control unit 240 of the first wireless communication device 200 that has received the service stores in the memory 250 which wireless communication device has received the service this time. Then, when enjoying the same service next time, the control unit 240 of the first wireless communication device 200 first tries to receive the service from the wireless communication device stored in the memory 250.
- the first wireless communication device 200 receives services from the seventh wireless communication device 107 and the eighth wireless communication device 108. Therefore, at the timing when the service is completed, information on the seventh wireless communication device 107 and the eighth wireless communication device 108 (past connection information (for example, information for specifying a service provider and a communication path)) is obtained. Stored in the memory 250.
- the control unit 240 of the first wireless communication device 200 first starts from the seventh wireless communication device 107 and the eighth wireless communication device 108 stored in the memory 250. Try to get service. By doing in this way, the overhead regarding the service provision using the radio
- the embodiment of the present technology it is possible to receive a service with minimum necessary power consumption and communication resources by using wireless communication in the first communication mode.
- the optimization process is performed regularly or irregularly while the service is being provided, the control overhead required to maintain the communication connection in the first communication mode can be minimized. . Accordingly, it is possible to efficiently use peripheral wireless communication devices necessary for receiving service provision, and to realize an optimum network configuration. That is, wireless communication performed between a plurality of wireless communication devices can be performed efficiently.
- the embodiment of the present technology an example in which two communication modes are used is shown. However, the embodiment of the present technology is also applied to a case where any N communication modes (where N is an integer of 3 or more) are used. Can be applied.
- the first communication mode can be visible light communication
- the second communication mode can be 2.4 GHz wireless LAN
- the third communication mode can be LTE.
- wireless communication of a broadband signal is performed at low cost in the first communication mode, and an optimal service provider and communication path using low-cost wireless communication in the second communication mode.
- the third communication mode although it is charged, an optimal service provider and communication path can be found for a wider range of wireless communication devices. In this way, it is possible to provide a multi-stage service according to the user's wishes.
- the processing procedure described in the above embodiment may be regarded as a method having a series of these procedures, and a program for causing a computer to execute these series of procedures or a recording medium storing the program. You may catch it.
- a recording medium for example, a CD (Compact Disc), an MD (MiniDisc), a DVD (Digital Versatile Disc), a memory card, a Blu-ray (registered trademark) Disc, or the like can be used.
- this technique can also take the following structures.
- a communication unit that transmits and receives data in at least one of the two communication modes; In the first communication mode, when data is transmitted / received to / from the second wireless communication device via one or more other wireless communication devices, the second communication mode is set to satisfy a predetermined condition
- a wireless communication apparatus comprising: a control unit that performs control for detecting the third wireless communication apparatus.
- the control unit connects to the third wireless communication device instead of the second wireless communication device in the first communication mode and connects to one or more other wireless communication devices.
- the wireless communication device according to (1) wherein control is performed to transmit and receive data to and from the third wireless communication device via the wireless communication device.
- the communication unit performs transmission and reception of data for receiving a first service provided by the second wireless communication device in the first communication mode with the second wireless communication device,
- the wireless communication device according to (1) or (2), wherein the control unit detects a wireless communication device that provides the same service as the first service in the second communication mode as the third wireless communication device.
- the communication unit performs transmission / reception of data for accepting the first service in the first communication mode with the second wireless communication device, and through one or more other wireless communication devices, Transmitting and receiving data to and from the fourth wireless communication device to receive a second service provided by the four wireless communication device;
- the control unit converts a wireless communication device serving as a common communication route to at least a part of a communication route for data transmission / reception performed with the fourth wireless communication device to the third wireless communication device.
- the wireless communication device according to (3) which is detected as: (5) The wireless communication device according to any one of (1) to (4), wherein the control unit detects the third wireless communication device by setting the second communication mode at a predetermined timing.
- the wireless communication device wherein the control unit sets the second communication mode based on a set value of a timer. (7) The wireless communication apparatus according to (5), wherein the control unit sets the second communication mode based on a communication state in the first communication mode. (8) The control unit according to (5), wherein the control unit sets the second communication mode based on a remaining capacity of a battery for driving another wireless communication device existing on a communication path in the first communication mode. Wireless communication device. (9) The wireless communication device according to (5), wherein the control unit sets the second communication mode based on a movement state of another wireless communication device existing on a communication path in the first communication mode.
- the first wireless communication device performs the second communication when data is transmitted to and received from the second wireless communication device via one or more other wireless communication devices in the first communication mode.
- a communication system that performs control for detecting the third wireless communication device that satisfies a predetermined condition by setting a mode.
- a first procedure for setting a second communication mode for performing wireless communication with another wireless communication device existing in a range wider than the predetermined range A program that causes a computer to execute a second procedure for detecting a third wireless communication device that satisfies a predetermined condition in the second communication mode.
Abstract
Description
1.第1の実施の形態(通信制御:第1通信モードの実行中に第2通信モードを設定して最適な無線通信装置を検出する例)
[通信システムの構成例]
図1は、本技術の第1の実施の形態における通信システム100のシステム構成例を示す図である。
図2は、本技術の第1の実施の形態における第1無線通信装置200の内部構成例を示すブロック図である。なお、他の無線通信装置の内部構成については、第1無線通信装置200と同一であるため、ここでは、第1無線通信装置200についてのみ説明し、他の無線通信装置の説明を省略する。
図3は、本技術の第1の実施の形態における第1モデム221および第2モデム222により行われる各通信モードの関係を示す図である。
図2に示すI/Oインタフェース230は、第1無線通信装置200と連動して動作するセンサ・アクチュエータ等の外部装置とのインタフェースである。図2では、外部装置として、例えば、移動検出部270、操作受付部280、表示部290および音声出力部295がI/Oインタフェース230に接続される例を示す。また、図2では、移動検出部270、操作受付部280、表示部290および音声出力部295を第1無線通信装置200の外部に設ける例を示すが、これらの全部または一部を第1無線通信装置200に内蔵するようにしてもよい。
図4は、本技術の第1の実施の形態における通信システム100を構成する各無線通信装置がサービスディスカバリ情報を送信する場合における送信例を示す図である。
図5および図6は、本技術の第1の実施の形態における通信システム100を構成する各無線通信装置が送信するビーコンのフォーマット例を示す図である。なお、図5のaには、ビーコン情報153に含まれる自装置サービス情報157のフォーマット例を示し、図5のbには、ビーコン情報153に含まれる他装置サービス情報158のフォーマット例を示す。また、図6には、自装置サービス情報157および他装置サービス情報158に含まれるサービス報知フィールドの内容例を示す。
図7は、本技術の第1の実施の形態における表示部290に表示される表示画面の一例(表示画面300)を示す図である。
図8は、本技術の第1の実施の形態における通信システム100を構成する各装置間における通信処理例を示すシーケンスチャートである。なお、この例では、第1通信モードでの無線通信により第7無線通信装置107が提供するサービスを第1無線通信装置200が受け付ける場合における通信処理を簡略化して示す。
図9は、本技術の第1の実施の形態における第1無線通信装置200が複数の無線通信装置から複数のサービスを受ける場合における接続状態の一例を示す図である。なお、図9に示すシステム構成については、図1と同様である。
図10は、本技術の第1の実施の形態における表示部290に表示される表示画面の遷移例を示す図である。
(1)第1無線通信装置200の制御部240は、第1通信モードでの回線占有率(どれだけの時間率でチャネルが占有されているか等)をモニタする。そして、制御部240は、第1通信モードでの通信容量が回線の混雑等でひっ迫し、所望のサービス提供を持続することができないと判断した場合(または、その危険がでてきた場合)には、第2通信モードの起動トリガを生成する。
(2)中継装置(サービスを中継する無線通信装置)、サービス提供装置(サービスを提供する無線通信装置)の何れかがバッテリ駆動の無線通信装置である場合を想定する。この場合には、バッテリ残量の減少に応じて、現在提供しているサービスを継続することができなくなる可能性がある。そこで、例えば、サービスを提供することができなくなる可能性がある無線通信装置は、自装置がサービスを継続することができない可能性がある旨を、周辺に存在する無線通信装置に通知する。その旨の情報は、マルチホップ・リレーにより転送され、サービスを享受している無線通信装置もその旨の情報を取得することができる。例えば、その旨の情報は、例えば、サービスディスカバリ情報に含めることができる。そして、その旨の情報を受信すると、サービスを享受している無線通信装置は、第2通信モードの起動トリガを生成する。
(3)中継装置、サービス提供装置の何れかが可搬性の高い無線通信装置(例えば、モバイル機器、携帯型の無線通信装置)である場合を想定する。この場合に、その無線通信装置が場所を移動すると、現在利用している通信経路が無効になる可能性がある。そこで、例えば、無線通信装置が場所を移動したため、サービスを提供できなくなる可能性がある無線通信装置は、自装置がサービス継続することができない可能性がある旨を、周辺に存在する無線通信装置に通知する。なお、無線通信装置の移動(例えば、閾値以上の移動)については、移動検出部(図2に示す移動検出部270に相当)により検出することができる。その旨の情報は、マルチホップ・リレーにより転送され、サービスを享受している無線通信装置もその旨の情報を取得することができる。例えば、その旨の情報は、例えば、サービスディスカバリ情報に含めることができる。そして、その旨の情報を受信すると、サービスを享受している無線通信装置は、第2通信モードの起動トリガを生成する。
次に、第2通信モードでの無線通信の一例について説明する。
図11は、本技術の第1の実施の形態における第1無線通信装置200が複数の無線通信装置から複数のサービスを受ける場合における接続状態の一例を示す図である。なお、図11に示すシステム構成については、図1と同様である。
図10のbには、最適な提供元および通信経路に変更するための最適化処理によりサービスの提供元または通信経路が変更された場合に表示される表示画面320を示す。
図12は、本技術の第1の実施の形態における第1無線通信装置200の通信制御処理の処理手順の一例を示すフローチャートである。図12では、所望のサービスをユーザが予め選択している場合の例を示す。
以上では、物理的に信号の伝達範囲が異なる2つの通信モードを、第1通信モードおよび第2通信モードとする例を示した。ただし、メッシュネットワークのマルチホップ・リレーの転送回数の制限の変更により信号の伝達範囲が異なる2つの通信モードを、第1通信モードおよび第2通信モードとすることも考えられる。例えば、物理的に信号の伝達範囲が同一の通信モードについて、メッシュネットワークのマルチホップ・リレーの転送回数の制限を変更させて、第1通信モードおよび第2通信モードとすることができる。
以上では、第2通信モードでの無線通信を用いて、最適なサービスの提供元および通信経路を検出する例を示した。ここで、過去に同様のサービスの提供を受けている場合には、そのサービスの提供を受けた際のサービスの提供元および通信経路を用いることも考えられる。
(1)
所定範囲内に存在する他の無線通信装置との間で無線通信を行う第1通信モードと、前記所定範囲よりも広い範囲内に存在する他の無線通信装置との間で無線通信を行う第2通信モードとのうちの少なくとも一方の通信モードにおいてデータの送受信を行う通信部と、
前記第1通信モードにおいて1または複数の他の無線通信装置を介して第2無線通信装置との間でデータの送受信が行われている場合に前記第2通信モードを設定して所定条件を満たす第3無線通信装置を検出するための制御を行う制御部と
を具備する無線通信装置。
(2)
前記制御部は、前記第3無線通信装置が検出された場合には、前記第1通信モードにおいて前記第2無線通信装置の代わりに前記第3無線通信装置に接続して1または複数の他の無線通信装置を介して前記第3無線通信装置との間でデータの送受信を行うための制御を行う前記(1)に記載の無線通信装置。
(3)
前記通信部は、前記第1通信モードにおいて前記第2無線通信装置が提供する第1サービスを受け付けるためのデータの送受信を前記第2無線通信装置との間で行い、
前記制御部は、前記第2通信モードにおいて前記第1サービスと同一のサービスを提供する無線通信装置を前記第3無線通信装置として検出する
前記(1)または(2)に記載の無線通信装置。
(4)
前記通信部は、前記第1通信モードにおいて前記第1サービスを受け付けるためのデータの送受信を前記第2無線通信装置との間で行うとともに、1または複数の他の無線通信装置を介して、第4無線通信装置が提供する第2サービスを受け付けるためのデータの送受信を前記第4無線通信装置との間で行い、
前記制御部は、前記第1通信モードにおいて前記第4無線通信装置との間で行われるデータの送受信の通信経路の少なくとも一部が共通する通信経路となる無線通信装置を前記第3無線通信装置として検出する
前記(3)に記載の無線通信装置。
(5)
前記制御部は、所定タイミングで前記第2通信モードを設定して前記第3無線通信装置を検出する前記(1)から(4)のいずれかに記載の無線通信装置。
(6)
前記制御部は、タイマの設定値に基づいて前記第2通信モードを設定する前記(5)に記載の無線通信装置。
(7)
前記制御部は、前記第1通信モードでの通信状態に基づいて前記第2通信モードを設定する前記(5)に記載の無線通信装置。
(8)
前記制御部は、前記第1通信モードでの通信経路上に存在する他の無線通信装置を駆動するためのバッテリの残容量に基づいて前記第2通信モードを設定する前記(5)に記載の無線通信装置。
(9)
前記制御部は、前記第1通信モードでの通信経路上に存在する他の無線通信装置の移動状態に基づいて前記第2通信モードを設定する前記(5)に記載の無線通信装置。
(10)
所定範囲内に存在する他の無線通信装置との間で無線通信を行う第1通信モードと、前記所定範囲よりも広い範囲内に存在する他の無線通信装置との間で無線通信を行う第2通信モードとのうちの少なくとも一方の通信モードにおいてデータの送受信を行う第1乃至第3無線通信装置を具備し、
前記第1無線通信装置は、前記第1通信モードにおいて1または複数の他の無線通信装置を介して前記第2無線通信装置との間でデータの送受信が行われている場合に前記第2通信モードを設定して所定条件を満たす前記第3無線通信装置を検出するための制御を行う
通信システム。
(11)
所定範囲内に存在する他の無線通信装置との間で無線通信を行う第1通信モードにおいて1または複数の他の無線通信装置を介して第2無線通信装置との間でデータの送受信が行われている場合に、前記所定範囲よりも広い範囲内に存在する他の無線通信装置との間で無線通信を行う第2通信モードを設定する第1手順と、
前記第2通信モードにおいて所定条件を満たす第3無線通信装置を検出する第2手順と
を具備する無線通信装置の制御方法。
(12)
所定範囲内に存在する他の無線通信装置との間で無線通信を行う第1通信モードにおいて1または複数の他の無線通信装置を介して第2無線通信装置との間でデータの送受信が行われている場合に、前記所定範囲よりも広い範囲内に存在する他の無線通信装置との間で無線通信を行う第2通信モードを設定する第1手順と、
前記第2通信モードにおいて所定条件を満たす第3無線通信装置を検出する第2手順と
をコンピュータに実行させるプログラム。
102 第2無線通信装置
103 第3無線通信装置
104 第4無線通信装置
105 第5無線通信装置
106 第6無線通信装置
107 第7無線通信装置
108 第8無線通信装置
109 第9無線通信装置
110 第10無線通信装置
111 第11無線通信装置
112 第12無線通信装置
113 第13無線通信装置
200 第1無線通信装置
211、212 アンテナ
220 通信部
221 第1モデム
222 第2モデム
230 I/Oインタフェース
240 制御部
250 メモリ
260 バス
270 移動検出部
280 操作受付部
290 表示部
295 音声出力部
Claims (12)
- 所定範囲内に存在する他の無線通信装置との間で無線通信を行う第1通信モードと、前記所定範囲よりも広い範囲内に存在する他の無線通信装置との間で無線通信を行う第2通信モードとのうちの少なくとも一方の通信モードにおいてデータの送受信を行う通信部と、
前記第1通信モードにおいて1または複数の他の無線通信装置を介して第2無線通信装置との間でデータの送受信が行われている場合に前記第2通信モードを設定して所定条件を満たす第3無線通信装置を検出するための制御を行う制御部と
を具備する無線通信装置。 - 前記制御部は、前記第3無線通信装置が検出された場合には、前記第1通信モードにおいて前記第2無線通信装置の代わりに前記第3無線通信装置に接続して1または複数の他の無線通信装置を介して前記第3無線通信装置との間でデータの送受信を行うための制御を行う請求項1記載の無線通信装置。
- 前記通信部は、前記第1通信モードにおいて前記第2無線通信装置が提供する第1サービスを受け付けるためのデータの送受信を前記第2無線通信装置との間で行い、
前記制御部は、前記第2通信モードにおいて前記第1サービスと同一のサービスを提供する無線通信装置を前記第3無線通信装置として検出する
請求項1記載の無線通信装置。 - 前記通信部は、前記第1通信モードにおいて前記第1サービスを受け付けるためのデータの送受信を前記第2無線通信装置との間で行うとともに、1または複数の他の無線通信装置を介して第4無線通信装置が提供する第2サービスを受け付けるためのデータの送受信を前記第4無線通信装置との間で行い、
前記制御部は、前記第1通信モードにおいて前記第4無線通信装置との間で行われるデータの送受信の通信経路の少なくとも一部が共通する通信経路となる無線通信装置を前記第3無線通信装置として検出する
請求項3記載の無線通信装置。 - 前記制御部は、所定タイミングで前記第2通信モードを設定して前記第3無線通信装置を検出する請求項1記載の無線通信装置。
- 前記制御部は、タイマの設定値に基づいて前記第2通信モードを設定する請求項5記載の無線通信装置。
- 前記制御部は、前記第1通信モードでの通信状態に基づいて前記第2通信モードを設定する請求項5記載の無線通信装置。
- 前記制御部は、前記第1通信モードでの通信経路上に存在する他の無線通信装置を駆動するためのバッテリの残容量に基づいて前記第2通信モードを設定する請求項5記載の無線通信装置。
- 前記制御部は、前記第1通信モードでの通信経路上に存在する他の無線通信装置の移動状態に基づいて前記第2通信モードを設定する請求項5記載の無線通信装置。
- 所定範囲内に存在する他の無線通信装置との間で無線通信を行う第1通信モードと、前記所定範囲よりも広い範囲内に存在する他の無線通信装置との間で無線通信を行う第2通信モードとのうちの少なくとも一方の通信モードにおいてデータの送受信を行う第1乃至第3無線通信装置を具備し、
前記第1無線通信装置は、前記第1通信モードにおいて1または複数の他の無線通信装置を介して前記第2無線通信装置との間でデータの送受信が行われている場合に前記第2通信モードを設定して所定条件を満たす前記第3無線通信装置を検出するための制御を行う
通信システム。 - 所定範囲内に存在する他の無線通信装置との間で無線通信を行う第1通信モードにおいて1または複数の他の無線通信装置を介して第2無線通信装置との間でデータの送受信が行われている場合に、前記所定範囲よりも広い範囲内に存在する他の無線通信装置との間で無線通信を行う第2通信モードを設定する第1手順と、
前記第2通信モードにおいて所定条件を満たす第3無線通信装置を検出する第2手順と
を具備する無線通信装置の制御方法。 - 所定範囲内に存在する他の無線通信装置との間で無線通信を行う第1通信モードにおいて1または複数の他の無線通信装置を介して第2無線通信装置との間でデータの送受信が行われている場合に、前記所定範囲よりも広い範囲内に存在する他の無線通信装置との間で無線通信を行う第2通信モードを設定する第1手順と、
前記第2通信モードにおいて所定条件を満たす第3無線通信装置を検出する第2手順と
をコンピュータに実行させるプログラム。
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Also Published As
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JP6269507B2 (ja) | 2018-01-31 |
JPWO2014103456A1 (ja) | 2017-01-12 |
EP2941085A1 (en) | 2015-11-04 |
US10091720B2 (en) | 2018-10-02 |
CN104885559A (zh) | 2015-09-02 |
US20150351022A1 (en) | 2015-12-03 |
EP2941085A4 (en) | 2016-08-03 |
CN104885559B (zh) | 2018-09-18 |
EP2941085B1 (en) | 2019-02-27 |
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