WO2019239886A1 - 通信装置、及び通信方法 - Google Patents
通信装置、及び通信方法 Download PDFInfo
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- WO2019239886A1 WO2019239886A1 PCT/JP2019/021196 JP2019021196W WO2019239886A1 WO 2019239886 A1 WO2019239886 A1 WO 2019239886A1 JP 2019021196 W JP2019021196 W JP 2019021196W WO 2019239886 A1 WO2019239886 A1 WO 2019239886A1
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- information
- radio base
- base station
- setting information
- common
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- the present technology relates to a communication device and a communication method, and more particularly, to a communication device and a communication method capable of performing more efficient wireless communication.
- a wireless terminal that starts a wireless LAN service must select an optimal wireless base station from a plurality of wireless base stations.
- the wireless base that is optimal on the spot so that wireless communication is not interrupted. It is desirable to switch the connection to the station.
- Patent Document 1 it is difficult to say that it is efficient because learning of wireless communication is necessary and it cannot be used in the initial setting or the like, so that more efficient wireless communication is performed. The technology of was requested.
- the present technology has been made in view of such a situation, and makes it possible to perform more efficient wireless communication.
- the communication device is a radio base station, acquires information related to setting information of another radio base station from another radio base station, and information related to setting information of the other radio base station. Based on the information, it generates sharing confirmation information indicating whether the setting information of the other radio base station and the setting information of the radio base station are common, and transmits the sharing confirmation information to the other radio base station It is a communication apparatus provided with the control part which performs control.
- a communication device of a radio base station acquires information related to setting information of another radio base station from another radio base station, and relates to setting information of the other radio base station. Based on the information, it generates sharing confirmation information indicating whether the setting information of the other radio base station and the setting information of the radio base station are common, and transmits the sharing confirmation information to the other radio base station Communication method.
- information on the setting information of the other radio base station is acquired from the other radio base station, and based on the information on the setting information of the other radio base station.
- the sharing confirmation information indicating whether the setting information of the other radio base station and the setting information of the radio base station are common is generated, and the sharing confirmation information is transmitted to the other radio base station.
- the communication device is a wireless terminal, and transmits the request signal including multiplexing information related to multiplexing of a response signal with respect to the request signal when transmitting the request signal to the radio base station. It is a communication apparatus provided with the control part which performs control to perform.
- the communication apparatus of the wireless terminal transmits the request signal to the wireless base station, the request signal including multiplexing information related to multiplexing of a response signal with respect to the request signal is transmitted.
- This is a communication method for performing transmission control.
- a request signal when a request signal is transmitted to a radio base station, a request signal including multiplexing information related to multiplexing of response signals to the request signal is transmitted.
- the communication devices according to the first aspect and the second aspect of the present technology may be independent devices or may be internal blocks constituting one device.
- FIG. 1 is a diagram illustrating an example of a configuration of a wireless communication system.
- the wireless communication system is composed of a plurality of networks (BSS: Basic Service Set) consisting of a wireless base station (AP: Access Point) and a wireless terminal (STA: Station) connected to the wireless base station.
- BSS Basic Service Set
- AP Access Point
- STA Station
- Wireless LAN Local Area Network
- FIG. 1 it is assumed that three wireless base stations AP1 to AP3 are installed in one home and there is one wireless terminal STA.
- the radio base station AP1 operates a network BSS1.
- the radio base stations AP2 and AP3 operate networks BSS2 and BSS3, respectively.
- the radio terminal STA can be connected to any of the networks BSS1 to BSS3 operated by the radio base stations AP1 to AP3.
- the configuration of the wireless communication system illustrated in FIG. 1 is an example, and the configuration is not limited to this.
- FIG. 2 is a block diagram illustrating an exemplary configuration of an embodiment of a communication device (wireless communication device) to which the present technology is applied.
- FIG. 2 is configured as a radio base station AP or a radio terminal STA in the radio communication system of FIG.
- the communication device 10 includes a control unit 101, a storage unit 102, a data processing unit 103, a transmission unit 104, a reception unit 105, and an antenna sharing unit 106.
- an antenna 107 is provided for the antenna sharing unit 106.
- the control unit 101 is configured by a processor such as a microprocessor, for example, and controls the operation of each unit in the communication device 10. Further, the control unit 101 exchanges information (data) between the blocks.
- control unit 101 controls the transmission unit 104 to perform processing such as adjustment of transmission parameters and determination thereof.
- control unit 101 controls the reception unit 105 to perform processing such as adjustment of reception parameters and determination thereof.
- the storage unit 102 includes a semiconductor memory such as a nonvolatile memory or a volatile memory.
- the storage unit 102 stores various data in accordance with control from the control unit 101.
- the storage unit 102 stores necessary signal transmission status, signal reception status, etc., such as reception power of beacons transmitted from other radio base stations AP. be able to. Further, the storage unit 102 can store a common setting information list to be described later.
- the data processing unit 103 performs data processing on data (signal) to be communicated in accordance with control from the control unit 101. Specifically, for example, at the time of transmission, the data processing unit 103 generates transmission data to be transmitted in a packet and supplies the transmission data to the transmission unit 104. For example, at the time of reception, the data processing unit 103 extracts reception data from the reception signal supplied from the reception unit 105.
- the transmission unit 104 generates a transmission signal from the transmission data supplied from the data processing unit 103 and supplies the transmission signal to the antenna sharing unit 106 according to the control from the control unit 101.
- the transmission unit 104 includes an analog signal conversion unit 111 and an RF transmission unit 112.
- the analog signal conversion unit 111 converts transmission data from a digital signal to an analog signal and supplies the analog signal to the RF transmission unit 112.
- the RF transmission unit 112 performs frequency conversion, power amplification, and the like of the analog signal supplied from the analog signal conversion unit 111, and generates a transmission signal.
- the transmission unit 104 can generate a transmission signal using a frequency band (RU: Resource Unit) instructed by the control unit 101.
- RU Resource Unit
- the antenna sharing unit 106 emits a transmission signal supplied from the transmission unit 104 (the RF transmission unit 112) as an electromagnetic wave via the antenna 107 at the time of transmission. Further, the antenna sharing unit 106 supplies the electromagnetic wave received via the antenna 107 to the reception unit 105 as a reception signal at the time of reception.
- the receiving unit 105 extracts received data from the received signal supplied from the antenna sharing unit 106 according to the control from the control unit 101 and supplies the extracted data to the data processing unit 103.
- the receiving unit 105 includes an RF receiving unit 121 and a digital signal converting unit 122.
- the RF reception unit 121 performs conversion to a digital signal that is easily converted into a digital signal by performing frequency conversion, power amplification, and the like of the reception signal, and supplies the analog signal to the digital signal conversion unit 122.
- the LNA Low Noise Amplifier
- AGC Automatic Gain Control
- the digital signal conversion unit 122 converts the analog signal supplied from the RF reception unit 121 into a digital signal and supplies the digital signal to the data processing unit 103.
- the communication apparatus 10 configured as described above is configured as the radio base station AP (or radio terminal STA) in the radio communication system of FIG. 1, but in order to perform more efficient radio communication, the control unit 101 For example, it has the following functions. That is, although details will be described later, the control unit 101 transmits a multiplexed probe response based on the common setting information list shared by the radio base station AP so that a highly efficient active scan is performed. Control the operation of each part.
- the wireless terminal STA selects an optimal wireless base station AP from a plurality of existing wireless base stations AP, or is a wireless terminal STA (mobile terminal) that is used while moving. Then, the connection is switched to the optimum wireless base station AP on the spot so that the wireless communication is not interrupted.
- the wireless terminal STA is required to perform high-speed scanning of the surrounding network BSS.
- IEEE802.11 which is a standard for a wireless LAN PHY / MAC layer, defines two methods, passive scan and active scan, as scan methods.
- the passive scan method is a method for obtaining information necessary for connection from a beacon signal (beacon) periodically transmitted from the radio base station AP.
- the active scan method is a method in which a request signal (probe request) is transmitted from the radio terminal STA to the radio base station AP, and various information is obtained as a response signal (probe response).
- the wireless terminal STA since the wireless terminal STA has to wait until a beacon from the wireless base station AP is transmitted, in order to search for a connection destination at a higher speed, a request signal is transmitted from the wireless terminal STA. It is desirable to use an active scan method.
- Patent Document 1 described above discloses a method for setting a scan time using learning information of a wireless terminal.
- the method disclosed in Patent Document 1 cannot be used at the time of initial setting or the like because learning for a certain time is required at the same place. Therefore, the present technology makes it possible to realize a high-efficiency active scan method that can be used as an initial setting without requiring learning of such a wireless terminal.
- Fig. 3 shows an outline of the active scan method.
- the time direction is the direction from the left side to the right side in the figure.
- the wireless terminal STA transmits a probe request to the wireless base stations AP arranged around the wireless terminal STA.
- Each radio base station AP that has received this probe request transmits a probe response to the radio terminal STA.
- each radio base station AP counts the set random time so that communication with other radio base stations AP does not overlap (does not suffer), and the count is “0”. After that, the probe response transmission starts.
- the countdown is resumed after waiting for the countdown until the transmission of the probe response is completed. To do.
- the wireless terminal STA transmits a probe request to each of the wireless base stations AP1, AP2, AP3, the wireless base stations AP1, AP2, AP2 from time t12 to time t14.
- the radio base station AP2 transmits a probe response to the radio terminal STA, while the radio base stations AP1 and AP3 excluding the radio base station AP2 are on standby.
- the radio base station AP1 transmits a probe response to the radio terminal STA.
- the radio base station AP3 Waiting.
- the radio base station AP3 excluding the radio base stations AP1 and AP2 transmits a probe response to the radio terminal STA.
- DIFS DCF Inter Frame Space
- SIFS Short Inter Frame Frame
- the processing time becomes longer as the number of the radio base stations AP existing around the radio terminal STA increases. Also, the radio terminal STA must set a longer time to wait for a probe response (probe response wait time) when it does not know how many surrounding radio base stations AP exist, and a longer time is required for scanning. Resulting in.
- FIG. 4 shows an example of probe response multiplex communication.
- the wireless terminal STA when transmitting a probe request to the surrounding wireless base station AP, the wireless terminal STA adds a frame including information on signal multiplexing (trigger information) and notifies it. Then, the radio base station AP that has received this probe request can select a frequency band based on information related to signal multiplexing included in the received trigger information, and can transmit a probe response in the selected frequency band. .
- the radio terminal STA when the radio terminal STA transmits a probe request including trigger information to the radio base stations AP1, AP2, AP3, respectively, the radio base stations AP1, AP2 and AP3 frequency-multiplex the probe response based on the trigger information and transmit it simultaneously to the wireless terminal STA.
- the radio terminal STA since the radio terminal STA can simultaneously receive the probe responses from the radio base stations AP1, AP2, AP3, the probe response waiting time can be shortened and the active scan time can be shortened.
- IEEE802.11ax only one means for allowing one radio base station AP to perform frequency multiplexing for a plurality of radio terminals STAs is allowed. Further, the following document discloses a technique for exchanging multiplexed information between radio base stations AP.
- the radio terminal STA does not know how many radio base stations AP exist around it, the band used for the probe response cannot be designated from the radio terminal STA side, and the radio base station It will be selected on the AP side.
- the wireless terminal STA communicates with a probe response (signal thereof) as narrow as possible in order to reduce the probability that the surrounding wireless base station AP and the use band overlap.
- FIG. 5 shows an example in which the bandwidth is narrowed when performing multiplex communication of probe responses.
- the direction from the left side to the right side in the figure is the time direction, and the direction from the lower side to the upper side in the figure represents the magnitude of the frequency.
- a probe response from the radio base station AP1 in addition to the preamble signal common to each radio base station AP, a probe response from the radio base station AP1, a probe response from the radio base station AP2, and a probe response from the radio base station AP3 are included. Although transmitted, the probe response from each radio base station AP is narrowed, so it is assumed that the effect of shortening the processing time of the active scan cannot be obtained.
- FIG. 6 shows an example of probe response multiplex communication to which the present technology is applied.
- probe response multiplex communication to which this technology is applied when transmitting a probe response, when transmitting information common to surrounding radio base stations AP (hereinafter referred to as common information), transmission using a wide band is performed. Do.
- the radio terminal STA performs reception in a state where probe responses (signals) from a plurality of radio base stations AP overlap, and if all the information transmitted from each radio base station AP is the same, It is possible to decode the signal without interference of each signal.
- a narrow band is used when transmitting information (information other than common information, hereinafter also referred to as unique information) different from the surrounding radio base station AP.
- unique information information other than common information, hereinafter also referred to as unique information
- the wireless terminal STA since the wireless terminal STA transmits the probe response (signal thereof) from each wireless base station AP in a different frequency band, it can receive and decode each signal separately. It is.
- a wide band (broadband) as the first band means a band wider than a narrow band (narrow band) as the second band, and when the first band and the second band are compared.
- the first band for example, 20 MHz to 40 MHz
- the second band for example, 2 MHz
- any band may be assigned to the first band and the second band.
- the same band is assigned to each first radio base station AP, and a different band is assigned (randomly) to each second radio base station AP.
- Examples of common setting information list In each radio base station AP, whether or not the information is common information is determined based on a list generated in advance between neighboring radio base stations AP (hereinafter, referred to as a common setting information list).
- FIG. 7 shows an example of the common setting information list.
- This common setting information list can be said to be common setting information determination information for determining whether or not setting information is common to other radio base stations AP in a certain radio base station AP.
- the common setting information list includes four patterns of information “Yes”, “No”, “Unknown”, and “Initial” for each setting information.
- the four patterns of information are identified by a 2-bit common flag (Common Flag).
- the setting information whose common flag is “Yes” is information common to the surrounding radio base station AP, and can be transmitted using a wide band. It is. Further, since the setting information other than the common flag “Yes” is information different from the surrounding radio base station AP, it can be transmitted using a narrow band. That is, it can be said that the common flag is information related to the setting information of the radio base station AP in the common setting information list.
- the common setting information list may be generated for each predetermined unit, for example, for each SSID (Service Set Identifier) or for each set group.
- SSID Service Set Identifier
- FIG. 7 a common setting information list is generated for the same SSID and for each other (specific group).
- “No” and “No” are set in Timestamp, “Yes” and “No” are set in Beacon interval, and Capability Information is set as a common flag (same SSID and others) for setting information. “Yes” and “Yes” are set. Also, for example, “Yes” and “No” are set in SSID, “Yes” and “Yes” are set in Supported Rates and BSS Membership Selectors, and “Unknown” and “Yes” are set in DSSS Parameter Set. "Unknown” is set.
- the common information between the radio base stations AP for example, in the case of using a radio base station product in an office, it is assumed that information such as Capability Information is often almost the same information.
- information such as Capability Information is often almost the same information.
- there are a plurality of common information such as IEEE802.11n compatible, IEEE802.11ac compatible, usable frequency band, and the like.
- each radio base station AP such as a MAC (Media Access Control Address) address or Timestamp needs to be communicated individually, and thus is not common information but unique information. .
- MAC Media Access Control Address
- FIG. 8 is a diagram illustrating an example of the entire sequence in the present technology.
- FIG. 8 the flow of processing to which the present technology is applied is shown as an overall sequence, which is divided into three phases: AP scan phase (S1), multiplexing information negotiation phase (S2), and STA scan phase (S3). Can be divided.
- S1 AP scan phase
- S2 multiplexing information negotiation phase
- S3 STA scan phase
- the AP scan phase (S1) is a phase in which each radio base station AP updates (or generates) a common setting information list held by itself based on beacons (notification signals) from other radio base stations AP.
- each radio base station AP receives a beacon transmitted from other radio base stations AP (for example, radio base stations AP2 and AP3) in the vicinity thereof (S11, S12). , S13).
- Each radio base station AP updates (or generates) the common setting information list held by itself based on the setting information included in the received beacon.
- S2 is the common setting information list generated by the AP scan phase shared between the radio base stations AP and whether the same common setting information list is held between the radio base stations AP? This is a phase to confirm whether or not.
- the radio base station AP1 In this multiplexing information negotiation phase, for example, the radio base station AP1 generates a multiplexing information frame and transmits it to the radio base stations AP2 and AP3 (S21).
- the multiplexed information frame includes information regarding the setting information of the common setting information list held by itself (the base station AP).
- the radio base stations AP2 and AP3 When the radio base stations AP2 and AP3 receive the multiplexed information frame from the radio base station AP1 and hold the same common setting information list as the radio base station AP1, the response (Ack) It transmits to AP1 (S22, S23).
- the radio base stations AP2 and AP3 since the radio base stations AP2 and AP3 hold the same common setting information list as the radio base station AP1, Ack is transmitted, but the radio base stations AP2 and AP3 are different from the radio base station AP1.
- the radio base stations AP2 and AP3 When the setting information list is held, the radio base stations AP2 and AP3 generate a multiplexed information frame including information related to the setting information in their common setting information list and transmit the multiplexed information frame to the radio base station AP1.
- This multiplexing information negotiation phase is assumed to be performed at a predetermined fixed interval, but is not limited to the timing. For example, when any one of the radio base stations AP changes the setting information or adjacent It is also possible to carry out by triggering when a new radio base station AP to be detected is detected.
- the STA scan phase (S3) is a phase in which, when using the active scan method, when the wireless terminal STA transmits a probe request, the wireless base station AP transmits a probe response in response to the request.
- a probe request with a trigger is transmitted as a probe request by the wireless terminal STA, and a multiple probe response is transmitted as a probe response by the wireless base station AP.
- the probe request (probe request with trigger) is a request signal
- the probe response (multiple probe response) is a response signal to the request signal.
- the probe request with trigger includes trigger information including information such as a frequency band and transmission power at the time of the multiple probe response in addition to the probe request.
- trigger information including information such as a frequency band and transmission power at the time of the multiple probe response in addition to the probe request.
- the common information of the radio base station AP is transmitted in a wideband frame, and the unique information of each radio base station AP is transmitted in a narrowband frame.
- this STA scan phase for example, when the wireless terminal STA is turned on (S41), a probe request with a trigger is transmitted to each of the wireless base stations AP1 to AP3 (S31).
- the radio base stations AP1 to AP3 transmit a multiple probe response to the radio terminal STA based on the trigger probe request from the radio terminal STA (S32).
- the wireless terminal STA receives the multiple probe responses from the wireless base stations AP1 to AP3, and transmits the response (Multi-STA Ack) to the wireless base stations AP1 to AP3, respectively (S33).
- the operation of the wireless LAN service by the active scan method is realized by the three phases of the AP scan phase, the multiplexing information negotiation phase, and the STA scan phase. Details will be described in order.
- FIG. 9 is a flowchart for explaining the process flow of the AP scan phase executed by the communication apparatus 10 as the radio base station AP.
- step S101 the receiving unit 105 receives a beacon transmitted from another radio base station AP.
- step S102 the control unit 101 extracts each setting information in the common setting information list stored in the storage unit 102 based on the setting information included in the received beacon.
- step S103 the control unit 101 updates the common flag (Common Flag) of the common setting information list stored in the storage unit 102 based on the extracted setting information.
- setting information for example, Timestamp, Beacon interval, etc.
- each setting information for example, Timestamp, Beacon, etc.
- the common setting information list held by itself.
- the status of the common flag (Common Flag) for the setting information in the common setting information list is updated.
- step S103 When the process of step S103 is completed, the process of the AP scan phase shown in FIG.
- FIG. 10 shows a state transition diagram of the common flag in the AP scan phase.
- the 2-bit common flag (Common Flag) can be represented by four states of “Initial”, “Yes”, “No”, and “Unknown”.
- the common flag when there is setting information in a beacon from another radio base station AP and the setting information is the same setting information as itself, the common flag The state transitions from “Initial” to “Yes” (T11 represented by an arrow starting from the circle “Initial” in the figure). If there is setting information in the beacon and the setting information is different from the setting information, the common flag changes from "Initial” to "No” (starting from the circle of "Initial” in the figure) T12) represented by an arrow.
- the common flag transitions from “Initial” to “Unknown” (“Initial” in the figure). ”Represented by an arrow starting from a circle“) ”.
- the common flag when there is setting information in a beacon from another radio base station AP, and the setting information is the same setting information as itself, the common flag is The state of “Yes” is maintained (T11 represented by an arrow starting from a circle of “Yes” in the figure). If there is setting information in the beacon and the setting information is different from the setting information, the common flag transitions from "Yes” to "No” (starting from the circle with "Yes” in the figure) T12) represented by an arrow.
- the common flag when there is setting information in the beacon from another radio base station AP, and the setting information is the same setting information as the own or different setting information, Or, when there is no setting information in the beacon from another radio base station AP, the common flag maintains the state of “No” (T11 represented by an arrow starting from a circle of “No” in the figure, T12, T13).
- the common flag when there is setting information in the beacon from another radio base station AP and the setting information becomes the same setting information as itself, or in the beacon When there is no setting information, the common flag maintains the state of “Unknown” (T11 and T13 represented by arrows starting from a circle of “Unknown” in the drawing). When there is setting information in the beacon and the setting information is different from the setting information, the common flag transitions from "Unknown” to "No" (starting from the "Unknown” circle in the figure) T12) represented by an arrow.
- a certain radio base station AP receives beacons from a plurality of radio base stations AP.
- the setting information included in the received beacons even one setting information is different from its own setting information.
- the state of the common flag is changed to “No”.
- the state of the common flag is changed to “No” or “Unknown”.
- each wireless base station AP updates the common flag in the common setting information list held by itself based on the setting information included in the beacons from other wireless base stations AP, The same common setting information list is held between the radio base stations AP.
- FIG. 11 shows an example of the format of the multiplexed information frame.
- the multiplexed information frame is based on a frame format called an element defined in IEEE802.11, but is not limited to this format.
- the frame format shown in FIG. 11 includes a multiplexed information element (AP multiplexed information element) and is referred to as a multiplexed information frame here.
- the multiplexed information frame includes Element ID, Length, Element ID, Extension, and Common Flag Info.
- ElementID identification information indicating that the element is a multiplexed information element is stored.
- Information on the length of the frame is stored in Length.
- Element ID Extension stores element extension information.
- Common Flag Information including common flag status of each setting information is stored in Common Flag Info.
- the common flag information indicates whether or not the setting information of its own radio base station AP and the setting information of other radio base stations AP are common, and the common setting information list among the radio base stations AP. In order to share the same, it is used as sharing confirmation information for confirming whether or not the same common setting information list is held between the radio base stations AP.
- This common flag information represents the state of the common flag of each setting information (for example, three states of “Yes”, “No”, “Unknown”) by 2 bits assigned to each setting information.
- the state of the common flag of each setting information is information regarding the setting information of the other radio base station AP, that is, setting information or multiplexing information included in a beacon from the other radio base station AP. It can be determined based on the common flag information included in the frame.
- the order of the setting information arranged in Common Flag Info can be determined using the Order number defined in IEEE802.11. Specifically, as shown in FIG. 7 described above, Order number 1 represents Timestamp, Order number 2 represents Beacon interval, and Order number 3 represents Capability Information. Similarly, Order numbers 4, 5, 6,... Represent SSID, SupportedSupportRates and BSS Membership Selectors, DSSS Parameter Set, respectively.
- Common Flag Info is arranged in order as 2-bit Common Flag, Order1 Common Flag, Order2 Common Flag, Order3 Common Flag, ..., for example, Order1 Common Flag is a common flag of Timestamp In this case, Order2 Common Flag represents Beacon interval, and Order3 Common Flag represents Capability Information.
- multiplexed information frames having such a structure are exchanged between the radio base stations AP.
- FIG. 12 is a flowchart for explaining the flow of processing in the multiplexing information negotiation phase executed by the communication device 10 as the radio base station AP.
- step S201 the receiving unit 105 receives a multiplexed information frame transmitted from another radio base station AP. Accordingly, the control unit 101 can acquire common flag information (Common Flag Info) included in the multiplexed information frame.
- Common Flag Info Common Flag Information
- step S ⁇ b> 202 the control unit 101 stores the information of the common setting information list held in the information of the acquired common flag information (Common Flag Info) (the state of the order common flag (Order Common Flag)). (Common Flag)) is determined.
- step S202 If it is determined in step S202 that the information matches, the process proceeds to step S203.
- step S203 the transmission unit 104 waits for a random time so that the notification does not overlap with another radio base station AP, and then transmits Ack to the other radio base station AP of the transmission source.
- step S204 the control unit 101 extracts each piece of setting information in which the common flag state does not match the order common flag state of the common flag information from the setting information in the common flag information list.
- step S205 the control unit 101 updates the common flag (Common Flag) of each piece of setting information extracted from the setting information in the common setting information list.
- the state of the common order flag (Order Common Flag) of the common flag information included in the multiplexed information frame received from another radio base station AP for example, “Yes”, “No”, “Unknown”
- common flag (Common Flag) status of each setting information for example, Timestamp, Beacon interval, etc.
- the common setting information list held by itself for example, “Yes”, “No”, “Unknown”
- the status of the common flag that does not match in the common setting information list is updated. .
- step S206 the transmission unit 104 waits for a random time so that the notification does not overlap with another radio base station AP, and then transmits the multiplexed information frame to the other radio base station AP of the transmission source.
- a multiplexed information frame including common flag information reflecting the contents of the updated common setting information list is generated and transmitted.
- the communication device 10 as the (own) radio base station AP, information on the setting information of the other radio base station AP (setting information included in the beacon or common flag information included in the multiplexed information frame) ), And based on the acquired information, common flag information as shared confirmation information indicating whether or not the setting information of its own radio base station AP and the setting information of another radio base station AP are common
- a multiplexed information frame including the generated multiplexed information frame is transmitted to another radio base station AP.
- step S203 or step S206 When the processing of step S203 or step S206 is completed, the multiplexing information negotiation phase processing shown in FIG. 12 is completed.
- FIG. 13 shows a state transition diagram of the common flag in the multiplexing information negotiation phase.
- the 2-bit common flag (Common Flag) consists of three states: “Yes”, “No”, and “Unknown”. That is, in the multiplexing information negotiation phase, the “Initial” state representing the initial state is excluded as the common flag state, as compared to the AP scan phase.
- the common flag in the common setting information list is “Yes”
- the common order information flag (Order Common) of the common flag information (Common Flag Info) included in the multiplexed information frame from another radio base station AP When “Flag” becomes “Yes”, the common flag in the common setting information list maintains the state of “Yes” (T21 represented by an arrow starting from a circle of “Yes” in the drawing).
- the common setting information list is common.
- the state of the flag is maintained as “No” (T21, T22, T23 represented by arrows starting from a circle of “No” in the drawing).
- the common order flag of the common flag information is “Yes” or “When “No”, the common flag in the common setting information list can be corrected by changing from “Unknown” to “Yes” or “No”.
- FIG. 14 is a diagram illustrating a first example of sharing of the common setting information list.
- FIG. 14 shows a case where the common setting information list is shared by the radio base station AP1, the radio base station AP2, and the radio base station AP3.
- the setting information A and B are common in the radio base stations AP1 and AP2
- the setting information A and C are common in the radio base stations AP2 and AP3
- the setting information A is common in the radio base stations AP1 and AP3.
- C are assumed to be common.
- the radio base station AP1 holds a common setting information list L-1 in which the common flag for the setting information A, B, and C is in the “Initial” state.
- the radio base stations AP1 and AP2 share the setting information A and B. Therefore, the common setting information list L ⁇ 2, the state of the common flag of the setting information A, B, C is updated to “Yes”, “Yes”, “No”, respectively.
- a beacon is transmitted from the radio base station AP3, and in the radio base station AP1 that has received the beacon, the setting information A and C is shared by the radio base stations AP1 and AP3. 3, the state of the common flag of the setting information B is updated from “Yes” to “No”.
- the beacon is exchanged between the radio base stations AP, so that each radio base station AP updates the common setting information list held by itself, and Holds the same common setting information list.
- FIG. 15 is a diagram showing a second example of sharing the common setting information list.
- the radio base station AP1 receives the beacon from the radio base station AP2, and sets the common flag for the setting information A, B, and C as the common setting information list L-2.
- the status is updated to “Yes”, “Yes”, and “No”, respectively.
- a multiplexing information frame is transmitted from the radio base station AP2 during the multiplexing information negotiation phase.
- the radio base station AP1 receives the multiplexed information frame from the radio base station AP2, and sets the setting information B as a common setting information list L-3 ′ based on the common order information flag of the common flag information obtained therefrom.
- the status of the common flag is updated from “Yes” to “No”.
- the radio base station AP2 receives the beacon from the radio base station AP3.
- the wireless base station AP1 can correct the common setting information list by receiving the multiplexed information frame from the wireless base station AP2 during the generalized information negotiation phase. Thereby, the same common setting information list is held among the radio base stations AP1, AP2, AP3.
- the common setting information list is corrected by the multiplexing information frame.
- the same common setting information list is held between the radio base stations AP.
- a probe request is transmitted from the wireless terminal STA to the wireless base station AP.
- a probe request with trigger information (with a trigger) Probe request) is sent.
- FIG. 16 shows an example of a format of a frame (probe trigger frame) in which a probe request with a trigger is stored.
- a probe trigger frame (Probe Trigger Frame) includes MAC header, frame body, trigger field, and FCS.
- the MAC header is a MAC layer header.
- the frame request body stores a probe request.
- Information relating to error detection / correction is stored in FCS (Frame ⁇ ⁇ Check ⁇ ⁇ Sequence).
- the probe trigger frame includes trigger information stored in the Trigger Field, in addition to the probe request stored in the Frame Body.
- Trigger Field includes Common Info and Per SSID Info as trigger information. Common Info stores the response time and STA information.
- Per SSID Info is information for each SSID to which a multiple probe response is to be transmitted, and includes, for example, SSID, Bandwidth Information, MCS, Target RSSI, and the like. These pieces of information are information relating to multiplexing of probe responses (multiplexing information), and can indicate whether or not multiplexing is possible depending on the presence or absence of information for each SSID.
- the SSID stores information for identifying the radio base station AP.
- Bandwidth information stores the bandwidth information related to the frequency band for transmitting the multiple probe response.
- MCS Modulation and Coding Scheme
- Information obtained by indexing a spatial stream with a modulation scheme and a coding rate is stored.
- Information about received signal strength is stored in Target ⁇ ⁇ RSSI (Received Signal Strength Indication).
- a probe trigger frame having such a structure is transmitted from the wireless terminal STA to surrounding wireless base stations AP.
- each wireless base station AP that has received the probe request with trigger transmits a probe response to the wireless terminal STA.
- probe responses transmitted in a wide band and a low band are multiplexed.
- a probe response (multiple probe response) is transmitted.
- FIG. 17 shows an example of the format of a frame (probe response multiplex frame) in which multiple probe responses are stored.
- the probe response multiplex frame is composed of a wideband frame and a narrowband frame.
- a frame having a probe response including a preamble signal and shared information is referred to as a wideband frame
- a frame having a probe response including specific information (information other than common information) is referred to as a narrowband frame.
- the relationship between the wide band as the first band and the narrow band as the second band is as described above.
- the preamble signal includes Wide Band Frame Duration.
- Wide Band Frame Duration stores wideband frame duration information. This wideband frame duration information indicates the time for transmission in a wideband frame as information relating to the length of the wideband frame.
- the wireless terminal STA that has received the probe response multiplex frame, from where the narrowband frame is transmitted based on the wideband frame duration information included in the preamble signal (boundary between the wideband frame and the narrowband frame (discontinuity)) Can be recognized (detected).
- the probe response includes MAC Header1 and Frame Body.
- MAC Header1 is a header of the MAC layer and includes, for example, Frame Control, Duration, Receiver Address, and the like.
- Frame IV Control information related to the control such as the type and destination of the probe response multiplex frame is stored.
- Information related to the length of the probe response multiplex frame (transmission time) is stored in Duration. That is, the wireless terminal STA that has received the probe response multiplex frame recognizes the entire length of the probe response multiplex frame (the end of the probe response multiplex frame (narrowband frame thereof)) based on the duration information of MAC Header1. it can.
- Receiver Address stores information related to the address of the probe response multiplex transmission destination (wireless terminal STA).
- Frame Control, Duration, Receiver Address is an example of MAC Header 1, and other wireless base stations AP (for example, wireless base stations AP2, AP2) around its own wireless base station AP (for example, wireless base station AP1). Header information common to AP3) can be included.
- common information is stored as information (probe response) transmitted by the wideband frame in the Frame Body (Probe Common Info.) Of the probe response.
- This common information is, for example, information common to other radio base stations AP (for example, radio base stations AP2 and AP3) around the radio base station AP (for example, radio base station AP1) in the setting information. Is done.
- the probe response includes, for example, MAC Header2, Frame Body and the like.
- MAC Header2 is a header of the MAC layer and includes Transmitter Address. Transmitter Address stores information related to the address of the transmission source of this frame.
- Transmitter Address is an example of MAC Header 2, and is different from other wireless base stations AP (for example, wireless base stations AP2 and AP3) around its own wireless base station AP (for example, wireless base station AP1) ( (Not common) header information can be included.
- the probe response Frame ⁇ ⁇ Body (Not Probe Common Info.) Stores unique information as information (probe response) transmitted by the narrowband frame. This unique information is different from other wireless base stations AP (for example, wireless base stations AP2 and AP3) around the wireless base station AP (for example, wireless base station AP1) in the setting information (not common), for example. ) Information.
- the narrowband frame is transmitted from where it is based on the wideband frame duration information included in the preamble signal. It is only necessary to know the break from the narrowband frame, and instead of Duration (time), for example, Length (number of bits) or the like may be used.
- Duration time
- Length number of bits
- FIG. 18 is a flowchart for explaining the processing flow of the STA scan phase executed by the communication apparatus 10 as the radio base station AP.
- step S301 the receiving unit 105 receives a probe request transmitted from the wireless terminal STA.
- step S302 the control unit 101 analyzes the received probe request and determines whether the probe request has been transmitted by broadcast or has been transmitted to itself.
- step S302 If it is determined in step S302 that the probe request has been transmitted by broadcast or has been transmitted to itself, the process proceeds to step S303.
- step S303 the control unit 101 determines whether or not the frame storing the received probe request is a probe trigger frame.
- step S303 If it is determined in step S303 that the frame is not a probe trigger frame, the received probe request becomes the current probe request, and thus the process proceeds to step S304.
- step S304 the control unit 101 generates a probe response corresponding to the received current probe request.
- step S305 the transmission unit 104 waits for a random time so that the response does not overlap with another wireless base station AP, and then transmits the generated probe response to the wireless terminal STA.
- step S303 determines whether trigger information addressed to its own SSID is stored in the Trigger field of the probe trigger frame.
- step S306 when it is determined that the trigger information addressed to the own SSID is stored in the Trigger Field, the received probe request is a probe request with a trigger and is addressed to itself. Advances to step S307.
- step S307 the control unit 101 generates a multiple probe response according to the received probe request with trigger. Details of the multiple probe response generation process will be described later with reference to the flowchart of FIG.
- step S308 the transmission unit 104 waits for a predetermined time so that the response does not overlap with another wireless base station AP, and then transmits the generated multiple probe response to the wireless terminal STA.
- step S305 or step S308 When the process of step S305 or step S308 is completed, the process of the STA scan phase shown in FIG.
- step S302 If it is determined in step S302 that the received probe request is not transmitted by broadcast and is not transmitted to itself (“NO” in S302), or received in step S306.
- the probe request is a probe request with a trigger but the trigger information addressed to its own SSID is not stored (“NO” in S306), the probe response or the multiple probe response is not transmitted, as shown in FIG. The process ends.
- step S351 the control unit 101 reads and acquires the common setting information list stored in the storage unit 102. Then, after the common setting information list is acquired by the control unit 101, the multiple probe response is generated by executing the processing of steps S352 to S355.
- control unit 101 sequentially sets one or a plurality of setting information requested by the received probe request with trigger as attention setting information, and refers to the acquired common setting information list and sets the common setting information as attention setting information. It is sequentially determined whether or not the flag (Common Flag) is “Yes” (S352, S353).
- the attention setting information for which the common flag is determined to be “Yes” is the common information as the frame Body (Probe Common Info. ) Is stored (S354), and the attention setting information for which the common flag is determined to be other than “Yes” (for example, “No” or “Unknown”) is Frame ⁇ Body (Not Probe) of the narrowband frame as unique information. (Multi-Info.) (S355), a multiple probe response is generated.
- the probe request with trigger is transmitted to the surrounding wireless base stations AP, so Multiple probe responses are received.
- this multiplex probe response is transmitted by multiplex communication in which the setting information requested by the probe request with trigger is classified into common information common to neighboring wireless base stations AP and unique information not common to each other, Even when the active scan method is employed when using the service, the time required for the active scan can be shortened. Thereby, for example, when the radio terminal STA moves, a faster handover can be realized when the radio base station AP is switched during the movement.
- the control unit 101 transmits a multiple probe response based on the shared common setting information list to realize a highly efficient active scan.
- the control function may be included in a communication module or a communication chip (communication device) included in a communication module or a communication chip (communication device).
- the frequency response is multiplexed when the probe response is multiplexed.
- the present invention is not limited to frequency multiplexing, and other multiplexing methods may be used.
- the common information is transmitted using the wide band as the first band
- the unique information is transmitted using the narrow band as the second band.
- Other bands such as an intermediate band (medium band) as a third band between the first band and the second band may be used.
- a band for transmitting unique information a low-bandwidth radio base station AP is assigned a low-bandwidth band, while another high-priority radio base station AP is assigned a medium-bandwidth band. It is possible to cope with various operations such as making it possible.
- the wireless terminal STA as the communication device 10 is an electronic device having a wireless communication function such as a smartphone, a tablet terminal, a mobile phone, a personal computer, a digital camera, a game machine, a television receiver, a wearable terminal, a speaker device, and the like. Can be configured. Further, the communication device 10 may be configured as a part of a device (for example, a communication module or a communication chip) constituting the radio base station AP or the radio terminal STA. That is, the communication device 10 is not limited to an electronic device, and includes a communication module, a chip, and the like (in this case, the communication device 10 does not include the antenna 107).
- communication is communication in which wireless communication and wired communication are mixed as well as wireless communication, that is, wireless communication is performed in a certain section and wired communication is performed in another section. It may be. Further, communication from one device to another device may be performed by wired communication, and communication from another device to one device may be performed by wireless communication.
- the present technology can take the following configurations.
- a wireless base station Obtain information on the setting information of other radio base stations from other radio base stations, Based on the information related to the setting information of the other radio base station, generate sharing confirmation information indicating whether the setting information of the other radio base station and the setting information of the radio base station are common,
- a communication apparatus comprising: a control unit that performs control to transmit the sharing confirmation information to the other radio base station.
- the controller is Generating the common setting information discriminating information for discriminating whether the setting information of the radio base station included in the response signal to the request signal from the radio terminal is common to the setting information of the other radio base station ,
- the communication device according to (1), wherein control is performed to update the common setting information determination information based on the sharing confirmation information transmitted from the other radio base station.
- the control unit determines the common setting information when the setting information of the other radio base station included in the sharing confirmation information is different from the setting information of the radio base station included in the common setting information determination information.
- the communication apparatus according to (2) wherein information related to setting information of the radio base station in the information is updated.
- the controller is When the common setting information determination information is updated, the sharing confirmation information reflecting the content of the updated common setting information determination information is generated, The communication apparatus according to (2) or (3), wherein the generated sharing confirmation information is transmitted to the other radio base station.
- the control unit includes the response signal including the setting information of the radio base station based on the common setting information determination information, and the setting information of the other radio base station transmitted from the other radio base station.
- the communication device according to any one of (2) to (4), wherein control is performed such that the response signal is multiplexed and transmitted to the wireless terminal.
- the setting information of the radio base station includes common information that is information common to setting information of the other radio base station, and unique information that is unique information in the radio base station,
- the control unit transmits the common information in a first band based on the common setting information determination information, and transmits the specific information in a second band that is narrower than the first band.
- the communication device according to (5).
- the first band is assigned the same band in the radio base station and the other radio base station,
- the communication device according to (6), wherein the second band is assigned a different band for each of the radio base station and the other radio base station.
- the response signal is A first frame corresponding to the first band and a second frame corresponding to the second band;
- the request signal includes multiplexing information related to multiplexing of the response signal,
- the multiplexing information includes information indicating whether multiplexing is possible, information regarding a frequency band for transmitting the response signal, information indicating a time until the response signal is responded, and information regarding received signal strength.
- (13) The communication device according to (12), wherein the control unit updates the generated common setting information determination information based on a notification signal transmitted from the other radio base station.
- the control unit determines whether the setting information of the other radio base station included in the notification signal is present, and whether the setting information of the radio base station and the setting information of the other radio base station are common.
- the communication apparatus according to (13), wherein information related to the setting information of the radio base station in the common setting information determination information is updated based on the information.
- the communication device according to any one of (2) to (14), further including a storage unit that stores the common setting information determination information.
- a wireless base station communication device Obtain information on the setting information of other radio base stations from other radio base stations, Based on the information related to the setting information of the other radio base station, generate sharing confirmation information indicating whether the setting information of the other radio base station and the setting information of the radio base station are common, A communication method for transmitting the sharing confirmation information to the other radio base station.
- a wireless terminal, A communication apparatus comprising: a control unit that performs control to transmit the request signal including multiplexing information related to multiplexing of a response signal to the request signal when transmitting the request signal to a radio base station.
- the multiplexing information includes information indicating whether multiplexing is possible, information regarding a frequency band for transmitting the response signal, information indicating a time until the response signal is responded, and information regarding received signal strength.
- the communication device of the wireless terminal A communication method for performing control to transmit the request signal including multiplexing information related to multiplexing of response signals to the request signal when transmitting the request signal to a radio base station.
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Abstract
Description
2.変形例
図1は、無線通信システムの構成の例を示す図である。
図2は、本技術を適用した通信装置(無線通信装置)の一実施の形態の構成の例を示すブロック図である。
ところで、無線LANサービスを利用するに際して、無線端末STAは、複数存在する無線基地局APの中から最適な無線基地局APを選択したり、あるいは、移動しながら使用する無線端末STA(移動端末)では、無線通信が途切れないようにその場その場で最適な無線基地局APへ接続を切り替えたりすることになる。
ここで、各無線基地局APにおいて、共通情報であるか否かの判定は、周囲の無線基地局AP同士であらかじめ生成したリスト(以下、共通設定情報リストという)に基づいて行われる。図7は、共通設定情報リストの例を示している。この共通設定情報リストは、ある無線基地局APにおいて、設定情報が他の無線基地局APと共通であるか否かを判別するための共通設定情報判別情報であるとも言える。
図8は、本技術における全体のシーケンスの例を示す図である。
まず、図9乃至図10を参照して、図8のAPスキャンフェーズの詳細について説明する。
次に、図11乃至図15を参照して、図8の多重化情報交渉フェーズの詳細について説明する。
次に、図16乃至図19を参照して、図8のSTAスキャンフェーズの詳細について説明する。
無線基地局であって、
他の無線基地局の設定情報に関する情報を他の無線基地局から取得し、
前記他の無線基地局の設定情報に関する情報に基づいて、前記他の無線基地局の設定情報と前記無線基地局の設定情報が共通するか否かを示す共有確認情報を生成し、
前記共有確認情報を前記他の無線基地局に送信する
制御を行う制御部を備える
通信装置。
(2)
前記制御部は、
無線端末からの要求信号に対する応答信号に含める前記無線基地局の設定情報ごとに前記他の無線基地局の設定情報と共通であるか否かを判別するための前記共通設定情報判別情報を生成し、
前記他の無線基地局から送信されてくる前記共有確認情報に基づいて、前記共通設定情報判別情報を更新する
制御を行う
前記(1)に記載の通信装置。
(3)
前記制御部は、前記共有確認情報に含まれる前記他の無線基地局の設定情報と、前記共通設定情報判別情報に含まれる前記無線基地局の設定情報とが異なる場合に、前記共通設定情報判別情報における前記無線基地局の設定情報に関する情報を更新する
前記(2)に記載の通信装置。
(4)
前記制御部は、
前記共通設定情報判別情報を更新した場合に、更新した前記共通設定情報判別情報の内容を反映した前記共有確認情報を生成し、
生成した前記共有確認情報を、前記他の無線基地局に送信する
制御を行う
前記(2)又は(3)に記載の通信装置。
(5)
前記制御部は、前記共通設定情報判別情報に基づいて、前記無線基地局の設定情報を含む前記応答信号を、前記他の無線基地局から送信される前記他の無線基地局の設定情報を含む前記応答信号と多重化して、前記無線端末に送信する制御を行う
前記(2)乃至(4)のいずれかに記載の通信装置。
(6)
前記無線基地局の設定情報は、前記他の無線基地局の設定情報と共通の情報である共通情報と、前記無線基地局にて固有の情報である固有情報を含み、
前記制御部は、前記共通設定情報判別情報に基づいて、前記共通情報を第1の帯域で送信し、前記固有情報を前記第1の帯域よりも狭い帯域である第2の帯域で送信する制御を行う
前記(5)に記載の通信装置。
(7)
前記第1の帯域は、前記無線基地局及び前記他の無線基地局にて同一の帯域が割り当てられ、
前記第2の帯域は、前記無線基地局及び前記他の無線基地局ごとに異なる帯域が割り当てられる
前記(6)に記載の通信装置。
(8)
前記応答信号は、
前記第1の帯域に応じた第1のフレームと、前記第2の帯域に応じた第2のフレームから構成され、
前記第1のフレームと前記第2のフレームの長さに関する情報を含む
前記(6)又は(7)に記載の通信装置。
(9)
前記応答信号は、前記第1のフレームで送信する時間と、前記第2のフレームで送信する時間に関する情報を含む
前記(8)に記載の通信装置。
(10)
前記要求信号は、前記応答信号の多重化に関する多重化情報を含み、
前記制御部は、前記共通設定情報判別情報、及び前記多重化情報に基づいて、前記応答信号を、前記無線端末に送信する制御を行う
前記(5)に記載の通信装置。
(11)
前記多重化情報は、多重化が可能であるか否かを示す情報、前記応答信号を送信する周波数帯域に関する情報、前記応答信号を応答するまでの時間を示す情報、及び受信信号強度に関する情報のうち、少なくとも1つの情報を含む
前記(10)に記載の通信装置。
(12)
前記制御部は、前記他の無線基地局から送信されてくる通知信号に基づいて、前記共通設定情報判別情報を生成する
前記(2)乃至(4)のいずれかに記載の通信装置。
(13)
前記制御部は、前記他の無線基地局から送信されてくる通知信号に基づいて、生成した前記共通設定情報判別情報を更新する
前記(12)に記載の通信装置。
(14)
前記制御部は、前記通知信号に含まれる前記他の無線基地局の設定情報の有無、及び前記無線基地局の設定情報と前記他の無線基地局の設定情報とが共通であるか否かに基づいて、前記共通設定情報判別情報における前記無線基地局の設定情報に関する情報を更新する
前記(13)に記載の通信装置。
(15)
前記共通設定情報判別情報を記憶する記憶部をさらに備える
前記(2)乃至(14)のいずれかに記載の通信装置。
(16)
前記応答信号の多重化は、周波数多重化である
前記(5)に記載の通信装置。
(17)
無線基地局の通信装置が、
他の無線基地局の設定情報に関する情報を他の無線基地局から取得し、
前記他の無線基地局の設定情報に関する情報に基づいて、前記他の無線基地局の設定情報と前記無線基地局の設定情報が共通するか否かを示す共有確認情報を生成し、
前記共有確認情報を前記他の無線基地局に送信する
通信方法。
(18)
無線端末であって、
要求信号を無線基地局に送信する際に、前記要求信号に対する応答信号の多重化に関する多重化情報を含む前記要求信号を送信する制御を行う制御部を備える
通信装置。
(19)
前記多重化情報は、多重化が可能であるか否かを示す情報、前記応答信号を送信する周波数帯域に関する情報、前記応答信号を応答するまでの時間を示す情報、及び受信信号強度に関する情報のうち、少なくとも1つの情報を含む
前記(18)に記載の通信装置。
(20)
無線端末の通信装置が、
要求信号を無線基地局に送信する際に、前記要求信号に対する応答信号の多重化に関する多重化情報を含む前記要求信号を送信する制御を行う
通信方法。
Claims (20)
- 無線基地局であって、
他の無線基地局の設定情報に関する情報を他の無線基地局から取得し、
前記他の無線基地局の設定情報に関する情報に基づいて、前記他の無線基地局の設定情報と前記無線基地局の設定情報が共通するか否かを示す共有確認情報を生成し、
前記共有確認情報を前記他の無線基地局に送信する
制御を行う制御部を備える
通信装置。 - 前記制御部は、
無線端末からの要求信号に対する応答信号に含める前記無線基地局の設定情報ごとに前記他の無線基地局の設定情報と共通であるか否かを判別するための共通設定情報判別情報を生成し、
前記他の無線基地局から送信されてくる前記共有確認情報に基づいて、前記共通設定情報判別情報を更新する
制御を行う
請求項1に記載の通信装置。 - 前記制御部は、前記共有確認情報に含まれる前記他の無線基地局の設定情報と、前記共通設定情報判別情報に含まれる前記無線基地局の設定情報とが異なる場合に、前記共通設定情報判別情報における前記無線基地局の設定情報に関する情報を更新する
請求項2に記載の通信装置。 - 前記制御部は、
前記共通設定情報判別情報を更新した場合に、更新した前記共通設定情報判別情報の内容を反映した前記共有確認情報を生成し、
生成した前記共有確認情報を、前記他の無線基地局に送信する
制御を行う
請求項2に記載の通信装置。 - 前記制御部は、前記共通設定情報判別情報に基づいて、前記無線基地局の設定情報を含む前記応答信号を、前記他の無線基地局から送信される前記他の無線基地局の設定情報を含む前記応答信号と多重化して、前記無線端末に送信する制御を行う
請求項2に記載の通信装置。 - 前記無線基地局の設定情報は、前記他の無線基地局の設定情報と共通の情報である共通情報と、前記無線基地局にて固有の情報である固有情報を含み、
前記制御部は、前記共通設定情報判別情報に基づいて、前記共通情報を第1の帯域で送信し、前記固有情報を前記第1の帯域よりも狭い帯域である第2の帯域で送信する制御を行う
請求項5に記載の通信装置。 - 前記第1の帯域は、前記無線基地局及び前記他の無線基地局にて同一の帯域が割り当てられ、
前記第2の帯域は、前記無線基地局及び前記他の無線基地局ごとに異なる帯域が割り当てられる
請求項6に記載の通信装置。 - 前記応答信号は、
前記第1の帯域に応じた第1のフレームと、前記第2の帯域に応じた第2のフレームから構成され、
前記第1のフレームと前記第2のフレームの長さに関する情報を含む
請求項6に記載の通信装置。 - 前記応答信号は、前記第1のフレームで送信する時間と、前記第2のフレームで送信する時間に関する情報を含む
請求項8に記載の通信装置。 - 前記要求信号は、前記応答信号の多重化に関する多重化情報を含み、
前記制御部は、前記共通設定情報判別情報、及び前記多重化情報に基づいて、前記応答信号を、前記無線端末に送信する制御を行う
請求項5に記載の通信装置。 - 前記多重化情報は、多重化が可能であるか否かを示す情報、前記応答信号を送信する周波数帯域に関する情報、前記応答信号を応答するまでの時間を示す情報、及び受信信号強度に関する情報のうち、少なくとも1つの情報を含む
請求項10に記載の通信装置。 - 前記制御部は、前記他の無線基地局から送信されてくる通知信号に基づいて、前記共通設定情報判別情報を生成する
請求項2に記載の通信装置。 - 前記制御部は、前記他の無線基地局から送信されてくる通知信号に基づいて、生成した前記共通設定情報判別情報を更新する
請求項12に記載の通信装置。 - 前記制御部は、前記通知信号に含まれる前記他の無線基地局の設定情報の有無、及び前記無線基地局の設定情報と前記他の無線基地局の設定情報とが共通であるか否かに基づいて、前記共通設定情報判別情報における前記無線基地局の設定情報に関する情報を更新する
請求項13に記載の通信装置。 - 前記共通設定情報判別情報を記憶する記憶部をさらに備える
請求項2に記載の通信装置。 - 前記応答信号の多重化は、周波数多重化である
請求項5に記載の通信装置。 - 無線基地局の通信装置が、
他の無線基地局の設定情報に関する情報を他の無線基地局から取得し、
前記他の無線基地局の設定情報に関する情報に基づいて、前記他の無線基地局の設定情報と前記無線基地局の設定情報が共通するか否かを示す共有確認情報を生成し、
前記共有確認情報を前記他の無線基地局に送信する
通信方法。 - 無線端末であって、
要求信号を無線基地局に送信する際に、前記要求信号に対する応答信号の多重化に関する多重化情報を含む前記要求信号を送信する制御を行う制御部を備える
通信装置。 - 前記多重化情報は、多重化が可能であるか否かを示す情報、前記応答信号を送信する周波数帯域に関する情報、前記応答信号を応答するまでの時間を示す情報、及び受信信号強度に関する情報のうち、少なくとも1つの情報を含む
請求項18に記載の通信装置。 - 無線端末の通信装置が、
要求信号を無線基地局に送信する際に、前記要求信号に対する応答信号の多重化に関する多重化情報を含む前記要求信号を送信する制御を行う
通信方法。
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| US15/734,376 US11689992B2 (en) | 2018-06-11 | 2019-05-29 | Communication apparatus and communication method |
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| US20230315325A1 (en) * | 2022-04-01 | 2023-10-05 | Nxp B.V. | Non-volative memory system configured to mitigate errors in read and write operations |
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| BR112020024833A2 (pt) | 2021-03-02 |
| US20210195505A1 (en) | 2021-06-24 |
| CN112219424A (zh) | 2021-01-12 |
| US11689992B2 (en) | 2023-06-27 |
| CN112219424B (zh) | 2024-03-12 |
| JP2021145156A (ja) | 2021-09-24 |
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