WO2011108390A1 - 無線通信装置、無線通信システム、無線通信方法およびプログラム - Google Patents
無線通信装置、無線通信システム、無線通信方法およびプログラム Download PDFInfo
- Publication number
- WO2011108390A1 WO2011108390A1 PCT/JP2011/053711 JP2011053711W WO2011108390A1 WO 2011108390 A1 WO2011108390 A1 WO 2011108390A1 JP 2011053711 W JP2011053711 W JP 2011053711W WO 2011108390 A1 WO2011108390 A1 WO 2011108390A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wireless communication
- packet
- transmission
- communication devices
- station
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
- H04W74/0816—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA carrier sensing with collision avoidance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/04—Scheduled or contention-free access
- H04W74/06—Scheduled or contention-free access using polling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
- H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
- H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance
-
- 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 invention relates to a wireless communication device, a wireless communication system, a wireless communication method, and a program.
- IEEE802.11a / g is widely spread, and in the future, spread of IEEE802.11n is expected.
- IEEE 802.11ac is currently being formulated as the next generation wireless LAN standard.
- IEEE802.11ac it is expected that a space division multiple access (SDMA) in which radio resources on the space axis are shared by a plurality of users will be adopted.
- SDMA space division multiple access
- one-to-many communication can be realized using the same frequency at the same time, so that the transmission rate can be further improved.
- CSMA / CA Carrier Sense Multiple Access with Collision Avoidance
- a wireless communication device that performs data transmission transmits an RTS (transmission request packet: Request To Send) and receives a data packet in response to reception of a CTS (response packet: Clear To Send) from the wireless communication device of the transmission destination. Start sending.
- a wireless communication apparatus that has received at least one of RTS and CTS not addressed to the local station sets a transmission stop period based on Duration information described in the received packet to avoid interference. Note that interference avoidance based on Duration information is described in Patent Document 1, for example.
- an object of the present invention is a new and improved data packet that can be transmitted without specifying a CTS transmission source device.
- Another object of the present invention is to provide a wireless communication device, a wireless communication system, a wireless communication method, and a program.
- a transmission unit that transmits a transmission request packet to a plurality of wireless communication devices, a reception unit that receives a response packet in response to the transmission request packet, When the response packet is received by the receiving unit from at least one of the plurality of wireless communication devices, a data processing unit that transmits a data packet from the transmission unit to the plurality of wireless communication devices;
- a wireless communication device is provided.
- Each of the data packets for the plurality of wireless communication devices may include timing information for designating the transmission timing of the reception confirmation packet for the data packet from the destination wireless communication device.
- the data processing unit may set the timing information so that the transmission timing of the reception confirmation packet from each of the plurality of wireless communication devices is different.
- the data processing unit may set the timing information so that reception confirmation packets transmitted from each of the plurality of wireless communication devices do not overlap on the time axis.
- the transmission unit may transmit the data packet to the plurality of wireless communication devices by space division multiple access.
- a plurality of first wireless communication devices and a transmission unit that transmits a transmission request packet to the plurality of first wireless communication devices
- a receiving unit that receives a response packet in response to a transmission request packet; and when the response packet is received by the receiving unit from at least one of the plurality of first wireless communication devices
- a wireless communication system comprising: a second wireless communication device having a data processing unit that transmits a data packet from the transmission unit to the plurality of first wireless communication devices.
- Two or more first wireless communication apparatuses that have received the transmission request packet may transmit the same response packet at a timing according to the same standard.
- Each of the data packets for the plurality of wireless communication devices includes timing information that specifies a transmission timing of a reception confirmation packet for the data packet from a transmission destination wireless communication device, and each of the plurality of wireless communication devices includes:
- the reception confirmation packet may be transmitted at a timing specified by the timing information.
- a step of transmitting a transmission request packet for a plurality of wireless communication devices a step of receiving a response packet in response to the transmission request packet, Transmitting a data packet to the plurality of wireless communication devices when the response packet is received from at least one of the plurality of wireless communication devices.
- a computer receives a transmission unit that transmits transmission request packets for a plurality of wireless communication devices and a response packet that responds to the transmission request packets. And when the response packet is received by the receiving unit from at least one of the plurality of wireless communication devices, the transmission unit transmits a data packet to the plurality of wireless communication devices. And a data processing unit for causing the program to function as a data processing unit.
- a plurality of constituent elements having substantially the same functional configuration may be distinguished by adding different numbers after the same reference numerals.
- a plurality of configurations having substantially the same functional configuration may be added to the stations 20 # 1, 20 # 2 and 20 # 3, branches 40-1, 40-2, 40-N, etc. as necessary. Distinguish.
- the stations 20 # 1, 20 # 2, and 20 # 3 are simply referred to as the station 20 when it is not necessary to distinguish them.
- FIG. 1 is an explanatory diagram showing a configuration of a wireless communication system 1 according to an embodiment of the present invention.
- a wireless communication system 1 according to an embodiment of the present invention includes an access point 10, stations 20 # 1 to 20 # 3, and peripheral wireless devices 30 # 1 to 30 # 4.
- Stations 20 # 1 to 20 # 3 exist within the communication range of access point 10, and access point 10 exists within the communication range of stations 20 # 1 to 20 # 3. Therefore, the stations 20 # 1 to 20 # 3 can communicate directly with the access point 10. That is, the stations 20 # 1 to 20 # 3 belong to the access point 10, and a plurality of wireless communication apparatuses including the stations 20 # 1 to 20 # 3 and the access point 10 are included in one communication group (BSS: Basic Service). Set).
- BSS Basic Service
- the access point 10 is a wireless communication device compliant with, for example, IEEE 802.11ac, and performs SDMA (space division multiple access) using an adaptive array antenna. Specifically, the access point 10 multiplexes transmission packets for a plurality of stations 20 on the same time axis and the same frequency band, or uses the same time axis and the same frequency band from the plurality of stations 20. One-to-many communication is realized by separating transmitted packets for each transmission source. The access point 10 can also perform one-to-one individual communication with each station 20.
- SDMA space division multiple access
- the station 20 is a wireless communication device compliant with, for example, IEEE 802.11ac, and performs SDMA (space division multiple access) using an adaptive array antenna.
- SDMA space division multiple access
- the station 20 performs packet separation at the time of reception, but does not multiplex transmission packets, so the number of antennas may be smaller than that of the access point 10.
- a part of the stations 20 # 1 to 20 # 3 may be a wireless communication device compliant with a conventional standard such as IEEE802.11a / g.
- each wireless communication device operates as an access point 20 (Group Owner) or a station 10 (Client) may be determined at the time of manufacturing the device or may be determined by negotiation at the time of connection processing. Good.
- wireless communication devices such as the access point 10 and the station 20 are not particularly limited.
- wireless communication devices such as the access point 10 and the station 20 are PCs (Personal Computers), home video processing devices (DVD recorders, VCRs, etc.), PDAs (Personal Digital Assistants), home game devices, home appliances, etc.
- the information processing apparatus may be used.
- the wireless communication device such as the access point 10 and the station 20 may be an information processing device such as a mobile phone, a PHS (Personal Handyphone System), a portable music playback device, a portable video processing device, or a portable game device. Good.
- FIGS. 2 and 3 are explanatory diagrams showing an RTS / CTS handshake in a wireless communication system according to a comparative example.
- a plurality of stations # 1 to # 3 simultaneously transmit CTSs to the RTS transmitted by the access point.
- each station adds a training field orthogonal to each station and transmits it to the CTS so that the access point can detect from which station each CTS is transmitted.
- a plurality of stations # 1 to # 3 transmit CTS with time dispersion to the RTS transmitted by the access point. Therefore, the access point can identify the CTS transmission source station based on the CTS reception timing.
- the overhead increases.
- the present invention has been created with the above circumstances in mind. According to the embodiment of the present invention, it is possible to transmit a data packet without specifying a CTS transmission source device. Hereinafter, such an embodiment of the present invention will be described in detail.
- FIG. 4 is an explanatory diagram showing the configuration of the wireless communication apparatus according to the embodiment of the present invention, such as the access point 10 and the station 20.
- the wireless communication apparatus according to the embodiment of the present invention includes N sets of branches 40-1 to 40-N and a data processing unit 48.
- Each branch 40 includes an antenna element 42, a reception unit 44, and a transmission unit 46.
- the wireless communication apparatus has N antenna elements 42-1 to 42-N, and multiplies communication packets by each antenna element 42 by an appropriate weight to thereby multiply N antenna elements 42-1 to 42-42.
- -N can function as an adaptive array antenna.
- the wireless communication apparatus that operates as the access point 10 includes more antenna elements 42, so that the number of stations that can simultaneously communicate by SDMA can be improved.
- the data processing unit 48 generates a transmission packet in response to a transmission request from an upper layer application, and distributes the transmission packet to the branches 42-1 to 42-N. More specifically, when the data processing unit 48 of the wireless communication apparatus operating as the access point 10 generates a transmission packet for each of the plurality of stations 20, transmission for the adaptive array antenna for each branch 42 is transmitted to each transmission packet. Multiply the weight.
- the data processing unit 48 supplies the transmission packets, which are spatially separated for each destination by multiplication, to the branches 42-1 to 42-N as digital baseband signals.
- the data processing unit 48 can apply an adaptive algorithm such as RLS (Recursive Last Square) to the training field, which is a known sequence received from the destination device, and can learn the weight for the adaptive array antenna. .
- RLS Recursive Last Square
- Each of the transmission units 46-1 to 46-N when a digital baseband signal is supplied from the data processing unit 25, performs signal processing such as encoding and modulation on the digital baseband signal. Further, each of the transmission units 46-1 to 46-N performs D / A conversion and up-conversion of the digital baseband signal, and supplies analog high-frequency signals to the antenna elements 42-1 to 42-N. To do.
- the antenna elements 42-1 to 42-N transmit the high-frequency signals supplied from the transmission units 46-1 to 46-N as radio signals.
- the receiving units 44-1 to 44-N When receiving the high frequency signals received by the antenna elements 42-1 to 42-N, the receiving units 44-1 to 44-N perform down conversion, A / D conversion, and the like of the high frequency signals. Further, each of the receiving units 44-1 to 44-N performs signal processing such as demodulation and combination on the baseband signal after A / D conversion, and the baseband signal after signal processing is sent to the data processing unit 48. Supply.
- the data processing unit 48 multiplies the baseband signals supplied from the reception units 44-1 to 44-N by the reception weight for the adaptive array antenna. Then, the data processor 48 supplies the upper layer application with a transmission packet for its own device among the transmission packets spatially separated by multiplication.
- the above spatial separation may include both separation of spatially multiplexed MIMO channels in addition to separation of transmission packets for each destination.
- the data processing unit 48 executes processing of a communication protocol in a MAC (Media Access Control) layer at the time of communication by the branches 40-1 to 40-N. Specifically, the data processing unit 48 realizes access control by generating a packet for RTS / CTS handshake (multi-RTS, CTS, data packet, ACK, etc. described later), a transmission instruction, and the like.
- RTS / CTS handshake multi-RTS, CTS, data packet, ACK, etc. described later
- a transmission instruction and the like.
- FIG. 5 is an explanatory diagram showing access control according to the embodiment of the present invention. As shown in FIG. 5, first, the access point 10 desiring data transmission to the stations 20 # 1 to # 3 transmits a multi-RTS as a transmission request packet.
- FIG. 6 is an explanatory diagram showing a configuration example of the multi-RTS.
- the multi-RTS includes a header and a payload.
- Payload includes address information of stations 20 # 1 to # 3 that the access point 10 desires to transmit data. That is, the access point 10 makes a transmission request to the stations 20 # 1 to # 3 by describing the address information of the stations 20 # 1 to # 3 in the multi-RTS.
- the stations 20 # 1 to # 3 When the stations 20 # 1 to # 3 receive the multi-RTS in which the address information of the own station is described, the stations 20 # 1 to # 3 transmit a CTS (response packet) to the access point 10 according to the same standard SIFS. As a result, the CTS is transmitted almost simultaneously from the stations 20 # 1 to # 3.
- CTS response packet
- the peripheral wireless device 30 # 1 has made a transmission reservation as a situation where the CTS cannot be received from the station 20 # 1.
- the station 20 # 1 belongs to the access point 10
- the access point 10 transmits a data packet to the station 20 # 1 as shown in FIG. 7, the transmission of the data packet does not disturb the communication of the station 20 # 1.
- the access point 10 transmits data packets (DATA # 1 to DATA # 3) to all the stations 20 # 1 to # 3 designated in the multi-RTS without determining the CTS transmission source station. Are spatially multiplexed and transmitted. However, the access point 10 needs to determine whether or not the stations 20 # 1 to # 3 have successfully received the data packet. Therefore, the access point 10 accurately determines the transmission source station of each ACK by temporally distributing transmissions of ACKs (reception confirmation packets) from the stations 20 # 1 to # 3.
- the data processing unit 48 of the access point 10 sets offset information in the data packets (DATA # 1 to DATA # 3) for each station 20, as shown in FIG.
- the offset information is timing information that specifies the transmission timing of the ACK from the station 20. More specifically, when the time length of the data packet for each station 20 is the same as shown in FIG. 5, the offset information may be information indicating the elapsed time from the end of reception of the data packet. Alternatively, the offset information may be information indicating a time point at which ACK should be transmitted, or information indicating an ACK transmission order.
- the data processing units 48 of the stations 20 # 1 to # 3 confirm the offset information set in the data packet for each, and as shown in FIG. 5, the ACK is sent to each branch 40 at the transmission timing specified by the offset information. To send from.
- the station 20 # 1 confirms the offset information # 1 set in the data packet (DATA # 1), and transmits an ACK after the time of the offset information # 1 has elapsed from the end of reception of the data packet.
- the station 20 # 2 starts transmitting ACK after the time indicated by the offset information # 2 elapses from the end of reception of the data packet (DATA # 2), and the station 20 # 3 transmits the data packet (DATA # 2).
- the transmission of ACK is started after the time indicated by the offset information # 3 has elapsed from the end of the reception of 3).
- the data processing unit 48 of the access point 10 sets the offset information so that the transmission timings of the ACKs from the stations 20 # 1 to # 3 do not overlap on the time axis. More specifically, the data processing unit 48 considers the SIFS error (+ ⁇ 10%) allowed in IEEE 802.11, and the transmission timing of each ACK is also determined when the SIFS error is the maximum. Offset information may be set so as not to overlap on the time axis.
- the data processing unit 48 of the access point 10 can accurately determine the ACK transmission source station 20 based on the offset information set in each station 20 and the ACK reception timing. For example, the data processing unit 48 of the access point 10 may determine the station 20 in which the offset information corresponding to the reception timing of ACK is set as the ACK transmission source station.
- the peripheral wireless device 30 since the CTS is simultaneously transmitted from the plurality of stations 20 as described above, it is a problem whether the peripheral wireless device 30 can normally receive the CTS and set the NAV. Become. For example, when the station 20 # 1 and the station 20 # 3 transmit the CTS at the same time, if the peripheral wireless device 30 # 4 cannot receive the CTS normally, the peripheral wireless device 30 # 4 interferes with the communication by the access point 10. Resulting in.
- the radio communication device on the receiving side can normally receive signals that arrive with a time lag within a predetermined range.
- each station 20 transmits the same CTS, not the CTS with the orthogonal training fields as shown in FIG. I will do it.
- peripheral wireless device 30 # 4 normally receives CTSs transmitted from different stations 20 # 1 and 20 # 3 as CTSs that arrive at different timings from the same transmission source in a multipath environment. , NAV can be set.
- FIG. 9 is an explanatory diagram showing a first modification of the offset information.
- the offset information may be information indicating an offset from the end of reception of the data packet by each station 20.
- the offset information # 1 for the station 20 # 1 may indicate the offset # 1 from the end of reception of the data packet by the station 20 # 1 to the start of ACK transmission.
- the offset information # 2 for the station 20 # 2 indicates the offset # 2 from the end of reception of the data packet by the station 20 # 2 to the start of ACK transmission
- the offset information # 3 for the station 20 # 3 is the station 20 #. 3 may indicate offset # 3 from the end of data packet reception by 3 to the start of ACK transmission.
- FIG. 10 is an explanatory view showing a second modification of the offset information.
- the offset information is information indicating the data transmission end position to the station 20 with the slowest end of data transmission from the access point 10 and the offset from the data transmission end position to the start of ACK transmission. Also good.
- the offset information # 1 for the station 20 # 1 includes the data transmission end position t for the station 20 # 2 with the slowest end of data transmission from the access point 10, and from the data transmission end position t to the start of ACK transmission. May be information indicating the offset # 1.
- the offset information # 2 for the station 20 # 2 may be information indicating the data transmission end position t and the offset # 2 from the data transmission end position t to the start of ACK transmission.
- the offset information # 3 for the station 20 # 3 may be information indicating the data transmission end position t and the offset # 3 from the data transmission end position t to the start of ACK transmission.
- FIG. 11 is a flowchart showing the operation of the access point 10 according to the embodiment of the present invention.
- the data processing unit 48 of the access point 10 sets the address information of all the destinations of the data packet in multi-RTS (S204).
- the branch 40 of the access point 10 transmits the multi-RTS generated by the data processing unit 48 (S208).
- the data processing unit 48 spatially multiplexes and transmits the data packet to all destinations set to the multi-RTS (S216). ).
- the data processing unit 10 sets offset information in the data packet for each station 20.
- the method for setting offset information is not particularly limited.
- the data processing unit 10 may set the offset information for each station 20 by the method described in “Modified example of offset information”.
- the data processing unit 48 of the access point 10 may determine that a CTS has been transmitted from at least one station 20 when any signal is received by the branch 40 in a time zone where CTS reception is expected. .
- the data processing unit 48 of the access point 10 determines the transmission source station of each ACK (S224). Specifically, the data processing unit 48 of the access point 10 can determine the ACK transmission source station based on the offset information set in each station 20 and the ACK reception timing. For example, the data processing unit 48 of the access point 10 may determine the station 20 in which the offset information corresponding to the reception timing of the ACK is set as the CTS transmission source station.
- the access point 10 terminates the series of transmission sequences when ACKs from all destinations are confirmed, and proceeds to a retransmission process when ACKs from any destination are not confirmed (S228). ).
- FIG. 12 is a flowchart illustrating the operation of the station 20 according to the embodiment of the present invention. As shown in FIG. 12, first, when a packet is received by the branch of the station 20, the data processing unit 48 of the station 20 checks whether or not the received packet is multi-RTS (S304).
- S304 multi-RTS
- the data processing unit 48 of the station 20 confirms whether or not the address information of the station 20 is described in the multi-RTS (S308). Then, the station 20 transmits a CTS to the access point 10 when the address information of the station 20 is described in the multi-RTS.
- the station 20 transmits a CTS including a training field for channel estimation by the access point 10 (S316).
- the station 20 transmits a normal CTS that does not include the training field (S320).
- the data processing unit 48 of the station 20 counts down the offset value indicated by the offset information (S328). ).
- the branch 40 of the station 20 transmits an ACK to the access point 10.
- the station 20 when the station 20 receives a packet that is not multi-RTS, the station 20 performs processing according to the received packet (S304). Further, when the address information of the own device is not described in the received multi-RTS, the station 20 sets a NAV (transmission prohibited period) based on the duration information included in the multi-RTS (S308).
- NAV transmission prohibited period
- the access point 10 transmits data packets (DATA # 1 to DATA # 1) to all the stations 20 # 1 to # 3 designated in the multi-RTS without determining the CTS transmission source station.
- DATA # 3 is spatially multiplexed and transmitted.
- the access point 10 accurately determines the transmission source station of each ACK by temporally distributing the transmission of ACK from the stations 20 # 1 to # 3.
- the access control method according to the embodiment of the present invention can suppress the overhead in the RTS / CTS handshake as compared with the access control method described with reference to FIG.
- the embodiment of the present invention since a SIFS error of about + -10% by the station 20 defined by IEEE 802.11 is allowed, the embodiment of the present invention is also easy to implement. It is valid.
- each step in the processing of the access point 10 and the wireless communication device 20 does not necessarily have to be processed in time series in the order described as a flowchart.
- each step in the processing of the access point 10 and the wireless communication device 20 may be processed in an order different from the order described as the flowchart, or may be processed in parallel.
- FIG. 9 and FIG. 10 an example has been described in which the access point 10 sets each offset information so that ACK is returned after data transmission from the access point 10 to all the stations 20 is completed. This is because it is assumed that the access point 10 cannot perform data transmission and ACK reception at the same time, but the present invention is not limited to such an example.
- the ACK is sequentially returned from each station 20 when the data transmission to each station 20 is completed. May be.
- an ACK is returned from the station 20 # 1 even before the data transmission end position t. May be.
- the time until the access point 10 finishes receiving all ACKs is shortened, it is possible to improve the throughput.
- a storage medium storing the computer program is also provided.
Abstract
Description
1.無線通信システムの構成
2.無線通信装置の構成
3.アクセス制御方法
4.無線通信装置の動作
(アクセスポイントの動作)
(ステーションの動作)
5.まとめ
まず、図1を参照し、本発明の実施形態による無線通信システム1の構成を説明する。
図4は、アクセスポイント10やステーション20などの本発明の実施形態による無線通信装置の構成を示した説明図である。図4に示したように、本発明の実施形態による無線通信装置は、N組のブランチ40-1~40-Nと、データ処理部48と、を備える。また、各ブランチ40は、アンテナ素子42、受信部44、および送信部46を含む。
図5は、本発明の実施形態によるアクセス制御を示した説明図である。図5に示したように、まず、ステーション20#1~#3へのデータ送信を所望するアクセスポイント10は、送信要求パケットとしてマルチRTSを送信する。
上記では、各ステーション20に対するデータパケットの時間長が同一である場合のオフセット情報について説明したが、各ステーション20に対するデータパケットの時間長が異なる場合も想定される。そこで、以下では、各ステーション20に対するデータパケットの時間長が異なる場合のオフセット情報の設定方法について説明する。
以上、本発明の実施形態によるアクセス制御について説明した。続いて、本発明の実施形態によるアクセスポイント10およびステーション20の動作を説明する。
図11は、本発明の実施形態によるアクセスポイント10の動作を示したフローチャートである。図11に示したように、まず、アクセスポイント10のデータ処理部48は、データパケットの全ての宛先のアドレス情報をマルチRTSに設定する(S204)。そして、アクセスポイント10のブランチ40が、データ処理部48により生成されたマルチRTSを送信する(S208)。
図12は、本発明の実施形態によるステーション20の動作を示したフローチャートである。図12に示したように、まず、ステーション20のブランチによりパケットが受信されると、ステーション20のデータ処理部48は、受信パケットがマルチRTSであるか否かを確認する(S304)。
以上説明したように、本発明の実施形態によるアクセスポイント10は、CTSの送信元ステーションを判断することなく、マルチRTSにおいて指定した全てのステーション20#1~#3にデータパケット(DATA#1~DATA#3)を空間多重して送信する。さらに、アクセスポイント10は、ステーション20#1~#3からのACKの送信を時間的に分散させることにより、各ACKの送信元ステーションを的確に判断する。
20 ステーション
40、40-1、40-2、40-N ブランチ
42、42-1、42-2、42-N アンテナ素子
44、44-1、44-2、44-N 受信部
46、46-1、46-2、46-N 送信部
48 データ処理部
Claims (10)
- 複数の無線通信装置に対する送信要求パケットを送信する送信部と;
前記送信要求パケットに応答する応答パケットを受信する受信部と;
前記複数の無線通信装置のうちの少なくともいずれかの無線通信装置から前記受信部により前記応答パケットが受信された場合、前記送信部から前記複数の無線通信装置にデータパケットを送信させるデータ処理部と;
を備える、無線通信装置。 - 前記複数の無線通信装置に対するデータパケットの各々は、送信先の無線通信装置からの前記データパケットに対する受信確認パケットの送信タイミングを指定するタイミング情報を含む、請求項1に記載の無線通信装置。
- 前記データ処理部は、前記複数の無線通信装置の各々からの前記受信確認パケットの送信タイミングが異なるように前記タイミング情報を設定する、請求項2に記載の無線通信装置。
- 前記データ処理部は、前記複数の無線通信装置の各々から送信される受信確認パケットが時間軸上で重ならないように前記タイミング情報を設定する、請求項3に記載の無線通信装置。
- 前記送信部は、空間分割多元アクセスにより前記複数の無線通信装置に対して前記データパケットを送信する、請求項4に記載の無線通信装置。
- 複数の第1の無線通信装置と;
前記複数の第1の無線通信装置に対する送信要求パケットを送信する送信部、
前記送信要求パケットに応答する応答パケットを受信する受信部、および、
前記複数の第1の無線通信装置のうちの少なくともいずれかの無線通信装置から前記受信部により前記応答パケットが受信された場合、前記送信部から前記複数の第1の無線通信装置にデータパケットを送信させるデータ処理部、を有する第2の無線通信装置と;
を備える、無線通信システム。 - 前記送信要求パケットを受信した2以上の第1の無線通信装置は、同一基準に従ったタイミングで同一の前記応答パケットを送信する、請求項6に記載の無線通信システム。
- 前記複数の無線通信装置に対するデータパケットの各々は、送信先の無線通信装置からの前記データパケットに対する受信確認パケットの送信タイミングを指定するタイミング情報を含み、
前記複数の無線通信装置の各々は、前記タイミング情報により指定されるタイミングに前記受信確認パケットを送信する、請求項7に記載の無線通信システム。 - 複数の無線通信装置に対する送信要求パケットを送信するステップと;
前記送信要求パケットに応答する応答パケットを受信するステップと;
前記複数の無線通信装置のうちの少なくともいずれかの無線通信装置から前記応答パケットが受信された場合、前記複数の無線通信装置にデータパケットを送信するステップと;
を含む、無線通信方法。 - コンピュータを、
複数の無線通信装置に対する送信要求パケットを送信する送信部と;
前記送信要求パケットに応答する応答パケットを受信する受信部と;
前記複数の無線通信装置のうちの少なくともいずれかの無線通信装置から前記受信部により前記応答パケットが受信された場合、前記送信部から前記複数の無線通信装置にデータパケットを送信させるデータ処理部と;
として機能させるための、プログラム。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020127022360A KR20130018660A (ko) | 2010-03-05 | 2011-02-21 | 무선 통신 장치, 무선 통신 시스템, 무선 통신 방법 및 프로그램 |
US13/579,185 US9554400B2 (en) | 2010-03-05 | 2011-02-21 | Wireless communication device, system, method and program for transmitting data packets without specifying a transmission source device of a clear to send packet |
CN201180011367.8A CN102783239B (zh) | 2010-03-05 | 2011-02-21 | 无线通信装置、无线通信系统和无线通信方法 |
US15/384,397 US10485026B2 (en) | 2010-03-05 | 2016-12-20 | Wireless communication device, wireless communication system, and wireless communication method |
US16/667,287 US11172507B2 (en) | 2010-03-05 | 2019-10-29 | Wireless communication device, wireless communication system, and wireless communication method |
US17/451,737 US11700640B2 (en) | 2010-03-05 | 2021-10-21 | Wireless communication device, wireless communication system, and wireless communication method |
US18/326,395 US20230319888A1 (en) | 2010-03-05 | 2023-05-31 | Wireless communication device, wireless communication system, wireless communication method and program |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-049410 | 2010-03-05 | ||
JP2010049410A JP2011188106A (ja) | 2010-03-05 | 2010-03-05 | 無線通信装置、無線通信システム、無線通信方法およびプログラム |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/579,185 A-371-Of-International US9554400B2 (en) | 2010-03-05 | 2011-02-21 | Wireless communication device, system, method and program for transmitting data packets without specifying a transmission source device of a clear to send packet |
US15/384,397 Continuation US10485026B2 (en) | 2010-03-05 | 2016-12-20 | Wireless communication device, wireless communication system, and wireless communication method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011108390A1 true WO2011108390A1 (ja) | 2011-09-09 |
Family
ID=44542046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/053711 WO2011108390A1 (ja) | 2010-03-05 | 2011-02-21 | 無線通信装置、無線通信システム、無線通信方法およびプログラム |
Country Status (5)
Country | Link |
---|---|
US (5) | US9554400B2 (ja) |
JP (1) | JP2011188106A (ja) |
KR (1) | KR20130018660A (ja) |
CN (1) | CN102783239B (ja) |
WO (1) | WO2011108390A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107211411A (zh) * | 2015-02-03 | 2017-09-26 | 夏普株式会社 | 无线接收装置、无线发送装置、通信方法及通信系统 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011188106A (ja) | 2010-03-05 | 2011-09-22 | Sony Corp | 無線通信装置、無線通信システム、無線通信方法およびプログラム |
US10327262B2 (en) | 2014-08-07 | 2019-06-18 | Wilus Institute Of Standards And Technology Inc. | Wireless communication method and wireless communication terminal |
KR102283173B1 (ko) * | 2014-10-22 | 2021-07-29 | 주식회사 윌러스표준기술연구소 | 무선 통신 방법 및 무선 통신 단말 |
US10396952B2 (en) * | 2014-12-03 | 2019-08-27 | Intel IP Corporation | Wireless device, method, and computer readable media for multiply-user request-to-send and clear-to-send and uplink ACK protection in a high efficiency wireless local-area network |
WO2016140179A1 (ja) * | 2015-03-02 | 2016-09-09 | シャープ株式会社 | 基地局装置および端末装置 |
JP6486221B2 (ja) * | 2015-06-29 | 2019-03-20 | Kddi株式会社 | 無線通信システム、送信機、無線通信方法及びコンピュータプログラム |
JP7031609B2 (ja) | 2017-01-30 | 2022-03-08 | 富士通株式会社 | 基地局、無線端末、無線通信システム、及び無線通信方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007214920A (ja) * | 2006-02-09 | 2007-08-23 | Mitsubishi Electric Corp | 無線通信システム |
WO2009027931A2 (en) * | 2007-08-31 | 2009-03-05 | Koninklijke Philips Electronics N.V. | Enhanced multi-user transmission |
Family Cites Families (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4343844B2 (ja) * | 2002-11-19 | 2009-10-14 | ビーエーイー・システムズ・インフォメーション・アンド・エレクトロニック・システムズ・インテグレーション・インコーポレーテッド | 帯域幅効率に優れたワイヤレスネットワークモデム |
JP4666890B2 (ja) * | 2003-04-28 | 2011-04-06 | ソニー株式会社 | 通信システム及び通信方法、並びに通信装置 |
US8274961B2 (en) * | 2003-10-24 | 2012-09-25 | Sony Corporation | Apparatus and associated methodology of adjusting a RTS/CTS transmission protocol |
JP2006050519A (ja) * | 2003-10-24 | 2006-02-16 | Sony Corp | 無線通信システム、無線通信装置及び無線通信方法、並びにコンピュータ・プログラム |
US20050096091A1 (en) * | 2003-10-31 | 2005-05-05 | Jacob Sharony | Method and system for wireless communications using multiple frequency band capabilities of wireless devices |
US8199723B2 (en) * | 2003-12-23 | 2012-06-12 | Intel Corporation | Parallel wireless communication apparatus, method, and system |
US20050141420A1 (en) * | 2003-12-24 | 2005-06-30 | Qinghua Li | Transmission coordination for SDMA downlink communication |
US20060165073A1 (en) * | 2004-04-06 | 2006-07-27 | Airtight Networks, Inc., (F/K/A Wibhu Technologies, Inc.) | Method and a system for regulating, disrupting and preventing access to the wireless medium |
EP1594259A1 (en) * | 2004-05-07 | 2005-11-09 | Infineon Technologies AG | Extension of initiation messages to improve channel estimation |
US7826431B2 (en) * | 2004-05-14 | 2010-11-02 | Interdigital Technology Corporation | Method of selectively adjusting the configuration of an access point antenna to enhance mobile station coverage |
US7822009B2 (en) * | 2005-05-09 | 2010-10-26 | Industrial Technology Research Institute | Distributed medium access protocol for wireless mesh networks |
US8023599B2 (en) * | 2005-10-24 | 2011-09-20 | Panasonic Corporation | Interfering signal characterizing quantity storing method and device, interfering signal characterizing quantity acquiring method and device, and interfering signal suppressing method and device |
US7751353B2 (en) * | 2005-12-29 | 2010-07-06 | Celeno Communications (Israel) Ltd. | Device, system and method of securing wireless communication |
US20070248089A1 (en) * | 2006-04-19 | 2007-10-25 | Jason Redi | Systems and methods for incorporating information corresponding to an end-to-end transmission in determining access to a communication medium |
US20070291913A1 (en) * | 2006-06-16 | 2007-12-20 | Solomon Trainin | Systems and arrangements for determining communication parameters in a network environment |
US8072957B2 (en) * | 2007-01-18 | 2011-12-06 | Proximetry, Inc. | System and method for incorporating dynamic orthogonal frequency-division multiplexing into wireless network protocols |
JP4888396B2 (ja) | 2007-03-05 | 2012-02-29 | ソニー株式会社 | 無線通信システム、無線通信装置及び無線通信方法、並びにコンピュータ・プログラム |
US20090303888A1 (en) * | 2007-05-03 | 2009-12-10 | Honeywell International Inc. | Method and system for optimizing wireless networks through feedback and adaptation |
US7920497B2 (en) * | 2007-08-15 | 2011-04-05 | Hitachi, Ltd. | System and method for multicast/broadcast reliability enhancement over wireless LANs |
TWI471043B (zh) * | 2008-03-04 | 2015-01-21 | Koninkl Philips Electronics Nv | 在多使用者系統中傳輸設定的發信 |
US8462686B2 (en) * | 2008-06-23 | 2013-06-11 | Thomson Licensing | Apparatus for collision mitigation of multicast transmissions in wireless networks |
JP2010081360A (ja) * | 2008-09-26 | 2010-04-08 | Toshiba Corp | 無線通信装置および無線通信方法 |
MX2011003592A (es) * | 2008-11-02 | 2011-04-27 | Lg Electronics Inc | Metodo previamente codificado para multiplexion espacial en sistema de entrada y salida multiple. |
US8804611B2 (en) * | 2009-02-12 | 2014-08-12 | Qualcomm Incorporated | Method and apparatus for acknowledging successful reception of a data transmission for multi-access compatibility in a wireless communication system |
US9485783B2 (en) * | 2009-05-07 | 2016-11-01 | Qualcomm Incorporated | Enhanced multichannel access for very high throughput |
JP5316208B2 (ja) | 2009-05-08 | 2013-10-16 | ソニー株式会社 | 通信装置及び通信方法、コンピューター・プログラム、並びに通信システム |
US20100316150A1 (en) | 2009-06-05 | 2010-12-16 | Broadcom Corporation | Mixed mode operations within multiple user, multiple access, and/or MIMO wireless communications |
CN102577207A (zh) * | 2009-06-12 | 2012-07-11 | 私人基金会加泰罗尼亚电信技术中心 | 用于使用多入多出或多入单出技术并具有多用户能力的无线宽带系统中的媒体访问控制的方法及设备 |
US9137815B2 (en) | 2009-06-17 | 2015-09-15 | Qualcomm Incorporated | Multi-user multiple input multiple output wireless communications |
WO2011025145A2 (en) | 2009-08-26 | 2011-03-03 | Lg Electronics Inc. | Method and apparatus of transmitting a sounding frame and communicating data in a wireless local area network system |
JP2011109205A (ja) | 2009-11-13 | 2011-06-02 | Sony Corp | 通信装置及び通信方法、コンピューター・プログラム、並びに通信システム |
US8477801B2 (en) * | 2009-12-15 | 2013-07-02 | Qualcomm Incorporated | Backoff procedure for post downlink SDMA operation |
US8374154B2 (en) * | 2009-12-23 | 2013-02-12 | Intel Corporation | Device, system and method of simultaneously communicating with a group of wireless communication devices |
US20110199946A1 (en) | 2010-02-17 | 2011-08-18 | Qualcomm Incorporated | Method and apparatus for supporting adaptive channel state information feedback rate in multi-user communication systems |
JP5598023B2 (ja) | 2010-03-03 | 2014-10-01 | ソニー株式会社 | 無線通信装置、無線通信システム、および無線通信方法 |
JP2011188106A (ja) | 2010-03-05 | 2011-09-22 | Sony Corp | 無線通信装置、無線通信システム、無線通信方法およびプログラム |
CN104185217B (zh) * | 2014-05-09 | 2019-08-27 | 中兴通讯股份有限公司 | 并行数据传输处理方法及装置 |
TWI734725B (zh) * | 2016-01-07 | 2021-08-01 | 美商內數位專利控股公司 | 多使用者(mu)傳輸保護方法及裝置 |
-
2010
- 2010-03-05 JP JP2010049410A patent/JP2011188106A/ja not_active Withdrawn
-
2011
- 2011-02-21 KR KR1020127022360A patent/KR20130018660A/ko active Search and Examination
- 2011-02-21 WO PCT/JP2011/053711 patent/WO2011108390A1/ja active Application Filing
- 2011-02-21 CN CN201180011367.8A patent/CN102783239B/zh active Active
- 2011-02-21 US US13/579,185 patent/US9554400B2/en active Active
-
2016
- 2016-12-20 US US15/384,397 patent/US10485026B2/en active Active
-
2019
- 2019-10-29 US US16/667,287 patent/US11172507B2/en active Active
-
2021
- 2021-10-21 US US17/451,737 patent/US11700640B2/en active Active
-
2023
- 2023-05-31 US US18/326,395 patent/US20230319888A1/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007214920A (ja) * | 2006-02-09 | 2007-08-23 | Mitsubishi Electric Corp | 無線通信システム |
WO2009027931A2 (en) * | 2007-08-31 | 2009-03-05 | Koninklijke Philips Electronics N.V. | Enhanced multi-user transmission |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107211411A (zh) * | 2015-02-03 | 2017-09-26 | 夏普株式会社 | 无线接收装置、无线发送装置、通信方法及通信系统 |
CN107211411B (zh) * | 2015-02-03 | 2021-09-10 | 夏普株式会社 | 无线接收装置、无线发送装置、通信方法及通信系统 |
Also Published As
Publication number | Publication date |
---|---|
US20220039164A1 (en) | 2022-02-03 |
KR20130018660A (ko) | 2013-02-25 |
US20120307696A1 (en) | 2012-12-06 |
US20230319888A1 (en) | 2023-10-05 |
US20170105232A1 (en) | 2017-04-13 |
US20200068614A1 (en) | 2020-02-27 |
CN102783239B (zh) | 2015-06-17 |
US10485026B2 (en) | 2019-11-19 |
US11172507B2 (en) | 2021-11-09 |
CN102783239A (zh) | 2012-11-14 |
JP2011188106A (ja) | 2011-09-22 |
US9554400B2 (en) | 2017-01-24 |
US11700640B2 (en) | 2023-07-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5598023B2 (ja) | 無線通信装置、無線通信システム、および無線通信方法 | |
US11039437B2 (en) | Communication apparatus, communication method, and communication system | |
US11700640B2 (en) | Wireless communication device, wireless communication system, and wireless communication method | |
EP2439974B1 (en) | Communication device, communication method, computer program, and communication system | |
JP2013528015A (ja) | マルチユーザmimo送信のための保護メカニズム | |
JP2013524644A (ja) | マルチユーザmimo送信のための保護メカニズム | |
US9179476B2 (en) | Multi-user transmission during reverse direction grant | |
WO2012032883A1 (ja) | 無線通信装置、プログラム、無線通信方法、および無線通信システム | |
KR20220121924A (ko) | 무선 통신 방법 및 무선 통신 단말 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180011367.8 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11750502 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13579185 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20127022360 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11750502 Country of ref document: EP Kind code of ref document: A1 |