[go: up one dir, main page]

USRE49471E1 - Method for protecting data in a mu-mimo based wireless communication system - Google Patents

Method for protecting data in a mu-mimo based wireless communication system Download PDF

Info

Publication number
USRE49471E1
USRE49471E1 US15/293,258 US201015293258A USRE49471E US RE49471 E1 USRE49471 E1 US RE49471E1 US 201015293258 A US201015293258 A US 201015293258A US RE49471 E USRE49471 E US RE49471E
Authority
US
United States
Prior art keywords
frame
transmission
rts
transmitting
duration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US15/293,258
Other languages
English (en)
Inventor
Yun-Joo Kim
Jae-Seung Lee
Sok-Kyu Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electronics and Telecommunications Research Institute ETRI
Original Assignee
Electronics and Telecommunications Research Institute ETRI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020107024389A external-priority patent/KR20110014576A/ko
Application filed by Electronics and Telecommunications Research Institute ETRI filed Critical Electronics and Telecommunications Research Institute ETRI
Priority to US15/293,258 priority Critical patent/USRE49471E1/en
Application granted granted Critical
Publication of USRE49471E1 publication Critical patent/USRE49471E1/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • 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
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with 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

  • Exemplary embodiments of the present invention relate to a method for protecting data by exchanging a RTS (Request To Send) frame and a CTS (Clear To Send) frame in a wireless communication system; and, more particularly, to a method for protecting MU-MIMO (Multi-User Multiple Input Multiple Output) data by exchanging multiple RTS/CTS frames in a wireless communication system based on MU-MIMO.
  • RTS Request To Send
  • CTS Call To Send
  • MU-MIMO Multi-User Multiple Input Multiple Output
  • a WLAN basically supports a BSS (Basic Service Set) consisting of an AP (Access Point), which serves as the point of access of a DS (Distributed System), and a plurality of wireless STAs (STAtions) other than the AP.
  • BSS Basic Service Set
  • AP Access Point
  • DS Distributed System
  • STAtions wireless STAs
  • the MAC (Medium Access Control) protocol of the WLAN operates based on CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance). Therefore, the WLAN involves resource wasting in the course of channel contention.
  • IEEE 802.11 Workgroup ‘e’ has defined an enhanced MAC protocol, which proposes that, when a radio resource transmission right is acquired, multiple MPDUs are transmitted using SIFS (Short Inter-Frame Space) during a TXOP (Transmission Opportunity), and block ACKs are received in response thereto (i.e. burst transmission).
  • IEEE 802.11 Workgroup ‘n’ has defined an A-MSDU (Aggregated MSDU) and an A-MPDU (Aggregated MDPU). At least one MSDU (which is a transmission unit) or at least one MPDU is aggregated even without IFS, and is transmitted in the process of one-time radio resource contention.
  • A-MSDU Aggregated MSDU
  • A-MPDU Aggregated MDPU
  • a VHT WLAN system supports, in a multiple (three)-STA environment consisting of one AP and two STAs, maximum throughput of 1 Gbps at the MAC SAP of the AP, as well as maximum throughput of 500 Mbps at the MAC SAP of a wireless STA for point-to-point environments. There is also consideration made so that each AP and STA of the VHT WLAN simultaneously supports compatibility with existing WLAN (IEEE 802.11a/n system).
  • a wireless STA When a wireless STA acquires a TXOP in a wireless communication system (e.g. WLAN), the STA needs to receive a response through a response frame regarding a request frame in order to improve reliability of wireless communication. Examples include a CTS frame responding to a RTS frame and an ACK frame responding to a transmitted data frame.
  • a wireless communication system e.g. WLAN
  • the responses are classified into immediate responses and delayed responses.
  • Responses (ACK frames) to a single piece of data correspond to the immediate responses; and block responses responding to a continuous transmission or aggregated MPDU correspond to both immediate and delayed responses.
  • An immediate response is used in the following manner when PHY-RXEND.primitive of a received request frame is generated, a response frame is transmitted after SIFS so that other wireless STAs do not transmit.
  • the frame exchange sequence constitutes a pair, as described above.
  • the generated response frame may not include a transmission address.
  • a delayed response is used in the following manner: a response is made through an ACK frame as a basic response for informing of whether an initially generated request frame has been received or not, and a response frame including requested information is then transmitted.
  • the response frame in this case may be transmitted through EDCA (Enhanced Distributed Channel Access) regarding channels, piggybacked by another frame, or aggregated and transmitted together with another frame.
  • EDCA Enhanced Distributed Channel Access
  • a transmitting STA receives a response frame from a receiving STA and then informs the receiving STA that the response frame has been received using an ACK frame.
  • the frame exchange sequence in such a WLAN may be applied to a multiple-user wireless communication system.
  • wireless STAs can receive frames according to the above-mentioned frame exchange sequence and simultaneously transmit response frames after IFS.
  • a wireless STA After receiving a frame, needs to transmit a response frame using a difference of channel or time.
  • Schemes for exchanging frames using a difference of time but the same bandwidth in a WLAN system include a scheme of exchanging a request frame eliciting response frames and a response frame through channel access for each wireless STA, and a scheme of transmitting, by a plurality of wireless STAs, successive response frames through a single request frame.
  • the scheme of exchanging a request frame eliciting response frames and a response frame through channel access for each wireless STA is as follows: an AP transmits a request frame to a first wireless STA through channel access; the first wireless STA transmit a response frame after SIFS; the AP transmits another request frame to a second wireless STA through channel access; and the second wireless STA transmits a response frame after SIFS.
  • the scheme of transmitting, by a plurality of wireless STAs, successive response frames through a single request frame is as follows: a single request frame including address information regarding multiple users is transmitted through channel access, and the wireless STAs then successively transmit response frames after SIFS.
  • Downlink operation in a wireless communication system based on MU-MIMO largely includes five phases, specifically a sounding phase for beamforming used in MU-MIMO, a group control phase capable of controlling transmission and reception with regard to multiple users, a NAV distribution phase for protecting MU-MIMO data from legacy wireless STAs, a beamformed data transmission phase for transmitting MU-MIMO data to multiple users within a designated group, and a response phase for receiving an ACK frame from a wireless STA that has received data.
  • FIG. 1 schematically illustrates downlink operation including a NAV distribution phase for informing of channel use for protecting MU-MIMO data from legacy wireless STAs.
  • the frame that delivers a NAV value should be decodable by legacy wireless STAs as well.
  • wireless STAs when performing channel access to acquire a TXOP, use RTS and CTS frames or short data and ACK frame exchange, or use CTS-to-Self frames.
  • An embodiment of the present invention is directed to a method for efficiently protecting MU-MIMO data by exchanging RTS and CTS frames, without modifying the existing control frame format, in a wireless communication system using MU-MIMO technology.
  • a method for protecting data transmitted from a transmitting wireless station to at least one receiving wireless station in a wireless communication system using MU-MIMO technology includes: transmitting a transmission request frame from the transmitting wireless station to each of the at least one receiving wireless station; and receiving a transmission approval frame from each of the at least one receiving wireless station as a response to the transmission request frame, wherein the transmission request frame comprises a VHT data marker for protecting VHT traffic.
  • the transmission request frame may be a RTS (Request To Send) frame
  • the transmission approval frame may be a CTS (Clear To Send) frame.
  • the VHT data marker may use a specific field of the RTS frame for a legacy wireless station.
  • the RTS frame may have a duration corresponding to the sum of transmission time of the CTS frame, transmission time of a next data frame, and response time for the next data frame.
  • the RTS frame may have a duration corresponding to a limit value of TXOP.
  • a method for protecting data transmitted from a transmitting wireless station to receiving wireless stations as many as a natural number n (n ⁇ 1) in a wireless communication system using MU-MIMO technology includes: transmitting a transmission request frame from the transmitting wireless station to each of at least one receiving wireless station; and receiving a transmission approval frame from each of the at least one receiving wireless station as a response to the transmission request frame, wherein the transmission request frame has a frame duration set for NAV setting.
  • the transmission request frame transmitted to the last receiving wireless station of the plurality of receiving wireless stations may have a duration different from a duration of transmission request frames to the other receiving wireless stations.
  • the transmission request frames transmitted to the other receiving wireless stations than the last receiving wireless station may have a duration corresponding to the sum of each IFS and transmission time of the transmission approval frames, and the transmission request frame transmitted to the last receiving wireless station may have a duration corresponding to the sum of transmission time of a transmission approval frame by the last receiving wireless station, transmission time of a VHT data frame, transmission time of a response frame, and IFS for each frame.
  • a method for protecting data transmitted from a transmitting wireless station to receiving wireless stations as many as a natural number n (n ⁇ 1) in a wireless communication system using MU-MIMO technology includes: transmitting a transmission request frame from the transmitting wireless station to each of a plurality of receiving wireless stations; and receiving a transmission approval frame from each of the plurality of receiving wireless stations as a response to the transmission request frame, wherein the transmission approval frames received from the receiving wireless stations, except for the last receiving wireless station, have a duration set as ‘0’, and the transmission request frame transmitted to the last receiving wireless station has a duration corresponding to the sum of transmission time of a transmission approval frame by the last receiving wireless station, transmission time of a VHT data frame, transmission time of a response frame, and IFS for each frame.
  • the method may further include: resetting a NAV value by the wireless stations, from which the transmission approval frames having a duration of ‘0’ have been received.
  • MU-MIMO data is protected by exchanging RTS and CTS frames, without modifying the existing control frame format, in a wireless communication system using MU-MIMO technology so that data can be simultaneously transmitted/received between an AP and a plurality of wireless STAs, while maintaining backward compatibility with existing WLAN systems, and throughput of the WLAN system is improved.
  • FIG. 1 illustrates downlink operation in a WLAN system to which the present invention is applied.
  • FIG. 2 illustrates a method for protecting MU-MIMO data by exchanging RTS/CTS frames in accordance with an embodiment of the present invention.
  • FIG. 3 illustrates a method for protecting MU-MIMO data by setting the interval of a CTS frame by an AP in accordance with another embodiment of the present invention.
  • FIG. 4 illustrates a method for protecting MU-MIMO data by changing the duration of a CTS frame by a wireless STA in accordance with still another embodiment of the present invention.
  • the present invention will hereinafter be described with reference to a wireless communication system, among various types of high-speed wireless communication systems, to which MU-MIMO technology is applied based on a wireless communication system defined by IEEE 802.11.
  • a wireless communication system among various types of high-speed wireless communication systems, to which MU-MIMO technology is applied based on a wireless communication system defined by IEEE 802.11.
  • IEEE 802.11 a wireless communication system defined by IEEE 802.11
  • the present invention is applicable to any environment using multiple channels or any wireless communication environment using MU-MIMO technology.
  • Occurrence of channel collision in a MU-MIMO WLAN system may result in low system efficiency compared with system complexity resulting from MU-MIMO application. This means that, compared with conventional RTS and CTS frame exchange, RTS and CTS frames need to be exchanged in a broader range.
  • the present invention proposes a method for exchanging multiple RTS and CTS frames so that CTS frames are received from all of multiple users who want to receive data, and the NAV of nearby wireless STAs is set.
  • FIG. 2 illustrates a method for protecting MU-MIMO data by exchanging RTS/CTS frames in accordance with an embodiment of the present invention.
  • FIG. 2 illustrates a RTS/CTS frame multiple exchange process for informing of a NAV value by using a legacy RTS frame format and a legacy CTS frame format. That is, FIG. 2 illustrates RTS/CTS multiple exchanges in a BSS consisting of one AP and three wireless STAs (STA1, STA2, STA3).
  • the AP transmits transmission request messages, i.e. RTS frames, to a plurality of wireless stations STA1, STA2, and STA3, to which data is to be transmitted, and receives transmission approval messages, i.e. CTS messages, from respective wireless stations STA1, STA2, and STA3 in response to the RTS frames.
  • RTS frames transmission request messages
  • CTS messages transmission approval messages
  • the AP transmits a RTS frame to STA1 through channel access.
  • the AP receives a CTS frame from STA1 after SIFS.
  • the AP similarly exchanges RTS/CTS frames with STA2.
  • the AP also exchanges RTS/CTS frames with STA3.
  • a CTS frame is transmitted in response to a RTS frame after SIFS.
  • the IFS xIFS
  • the IFS may be one of SIFS, RIFS (Reduced Inter-Frame Space), and undefined IFS.
  • Legacy wireless STAs i.e. conventional WLAN STAs based on IEEE 802.11a and IEEE 802.11n, can receive a RTS or CTS frame from a VTH wireless STA and, upon receiving such a RTS or CTS frame from a VHT STA, can set a NAV value. Therefore, when a legacy wireless STA receives a RTS or CTS frame, it recognizes that the channel is being used and performs no channel access process.
  • VHT wireless STAs operate the same as legacy STAs in the process of exchanging RTS or CTS frames, the VHT STAs recognize that the channel is being used and do not perform the NAV distribution process of FIG. 2 .
  • the present invention proposes that, when a conventional RTS frame is used by VHT wireless STAs to exchange RTS/CTS frames and set NAV for MU-MIMO data protection, the transmitted RTS frame include a mark for protecting VHT traffic (hereinafter, referred to as a VHT data marker).
  • the VHT data marker may be implemented by re-using a specific field of a legacy RTS frame or by using a reserved bit (which is not yet defined) of a legacy RTS frame. For example, a bit for indicating an individual or a group in the TA field of a legacy RTS frame may be used (when set as ‘1’, indicates a RTS frame for VHT wireless STAs).
  • a legacy wireless STA Upon receiving such a RTS frame, a legacy wireless STA can function normally because it has the same format as a legacy RTS frame. Furthermore, a VHT wireless STA can read a specific field of the RTS frame which has been modified and, when a VHT data marker has been set therein, recognize that it is a RTS frame for VHT traffic protection.
  • a VHT wireless STA must update the NAV value even if a legacy RTS frame including no VHT data marker is received. Furthermore, even if the VHT wireless STA has received not data, but a RTS frame transmitted by the AP for the next user, the STA must be able to transmit a CTS frame in response to the received RTS frame as long as the receiving STA address is directed to itself.
  • the duration of a RTS frame generally includes ‘CTS frame transmission time+next data frame transmission time+response time’, or includes all cases including a TXOP limit value.
  • FIG. 3 illustrates a method for protecting MU-MIMO data by setting the duration of a CTS frame by an AP in accordance with another embodiment of the present invention.
  • the method in accordance with another embodiment of the present invention illustrated in FIG. 3 proposes that the AP sets a short duration of RTS frames transmitted to multiple users so that, even if VHT wireless STAs do not modify the process of receiving and processing RTS or CTS frames, VHT data protection operation is performed.
  • the AP transmits transmission request frames, i.e. RTS frames, to a plurality of wireless STAs (STA1, STA2, STA3), to which data is to be transmitted, and receives transmission approval frames, i.e. CTS frames, from respective wireless STAs (STA1, STA2, STA3) in response to the RTS frames.
  • the AP sets the duration of RTS frames transmitted to respective wireless STAs.
  • the duration of RTS frames to the first to (n ⁇ 1) th VHT wireless STAs is set as “SIFS+CTS transmission time” as in the case of NAV1 and NAV2 illustrated in FIG. 3 .
  • the duration of a RTS frame to the n th VHT wireless STA is set as “SIFS+CTS transmission time+xIFS+MU-MIMO data frame transmission time+xIFS+response frame transmission time”, as in the case of NAV3 illustrated in FIG. 3 , for VHT data protection.
  • the duration of RTS frames to the first to (n ⁇ 1) th wireless STAs is set as a period of time for receiving CTS frames from respective wireless STAs
  • the duration of a RTS frame to the n th wireless STA is set as a period of time for receiving a CTS frame from the n th wireless STA, transmitting MU-MIMO data to n wireless STAs, and receiving response frames to the transmitted MU-MIMO data.
  • this embodiment of the present invention can use both legacy RTS frames and CTS frames and control the duration of RTS frames by the VHT AP, making it unnecessary to modify the CTS frame processing operation.
  • the AP may also transmit a RTS frame only to one of the plurality of wireless STAs and, even in this case, the AP can set the duration of the RTS frame and control NAV for data protection.
  • FIG. 4 illustrates a method for protecting MU-MIMO data by modifying the duration of a CTS frame by a wireless STA in accordance with still another embodiment of the present invention.
  • the duration of a RTS frame is set to be larger than the NAV distribution period, but a wireless STA, after receiving the RTS frame, sets the duration of a CTS frame as ‘0’, regardless of the duration of the received RTS frame, and then makes a response.
  • the n th wireless STA does not set the duration of a transmitted CTS frame as ‘ 0 ’ for the sake of MU-MIMO data protection. That is, the AP can set the duration of a RTS frame to the n th wireless STA as “SIFS+CTS transmission time+xIFS+MU-MIMO data frame transmission time+xIFS+response frame transmission time”, and the n th wireless STA can designate a data protection interval by avoiding setting the duration of a CTS frame as ‘0’.
  • STA1 and STA2 when the AP is to transmit data to multiple wireless STAs (STA1, STA2, STA3) as many as n, STA1 and STA2 set the duration of CTS frames as ‘0’ regardless of the duration of the received RTS frames and then transmit CTS frames. Consequently, wireless STAs that have received the CTS frames with ‘0’ duration reset the NAV value.
  • the AP sets the duration of a RTS frame to the n th wireless STA (i.e. STA3) as the period of time needed by the n th wireless STA to transmit a CTS frame, to transmit MU-MIMO data to the n wireless STAs, and to receive response frames to the transmitted MU-MIMO data, i.e.
  • n th wireless STA i.e. STA3
  • STA3 does not set the duration of a CTS frame as ‘0’, but retains the duration of the RTS frame.
  • Such a process of transmitting beamformed data by NAV3 supports NAV protection.
  • legacy RTS and CTS frame formats can be used without adding or modifying the RTS/CTS frame format and, even if a CTS frame fails to be transmitted, a different wireless STA maintains NAV protection, enabling recovery by the AP.
  • the present invention also makes it unnecessary for a VHT wireless STA to transmit a CTS frame and update the NAV.
  • the above-described methods can also be embodied as computer programs. Codes and code segments constituting the programs may be easily construed by computer programmers skilled in the art to which the invention pertains. Furthermore, the created programs may be stored in computer-readable recording media or data storage media and may be read out and executed by the computers. Examples of the computer-readable recording media include any computer-readable recoding media, e.g., intangible media such as carrier waves, as well as tangible media such as CD or DVD.
  • the present invention is applicable to technology for protecting MU-MIMO data by exchanging multiple RTS/CTS frames in a wireless communication system based on MU-MIMO.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
US15/293,258 2009-11-24 2010-11-24 Method for protecting data in a mu-mimo based wireless communication system Active 2031-05-20 USRE49471E1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/293,258 USRE49471E1 (en) 2009-11-24 2010-11-24 Method for protecting data in a mu-mimo based wireless communication system

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
KR1020107024389A KR20110014576A (ko) 2008-05-31 2009-05-05 산화 금속 코팅을 갖는 공구
KR10-2009-0113869 2009-11-24
KR20090113869 2009-11-24
KR10-2010-0024389 2010-03-18
PCT/KR2010/008361 WO2011065749A2 (fr) 2009-11-24 2010-11-24 Procédé de protection de données dans un système de communication sans fil sur une base mu-mimo
US13/511,363 US8861495B2 (en) 2009-11-24 2010-11-24 Method for protecting data in a MU-MIMO based wireless communication system
US15/293,258 USRE49471E1 (en) 2009-11-24 2010-11-24 Method for protecting data in a mu-mimo based wireless communication system

Publications (1)

Publication Number Publication Date
USRE49471E1 true USRE49471E1 (en) 2023-03-21

Family

ID=44069189

Family Applications (2)

Application Number Title Priority Date Filing Date
US15/293,258 Active 2031-05-20 USRE49471E1 (en) 2009-11-24 2010-11-24 Method for protecting data in a mu-mimo based wireless communication system
US13/511,363 Ceased US8861495B2 (en) 2009-11-24 2010-11-24 Method for protecting data in a MU-MIMO based wireless communication system

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13/511,363 Ceased US8861495B2 (en) 2009-11-24 2010-11-24 Method for protecting data in a MU-MIMO based wireless communication system

Country Status (3)

Country Link
US (2) USRE49471E1 (fr)
KR (1) KR101948082B1 (fr)
WO (1) WO2011065749A2 (fr)

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10425134B2 (en) 2004-04-02 2019-09-24 Rearden, Llc System and methods for planned evolution and obsolescence of multiuser spectrum
US10985811B2 (en) 2004-04-02 2021-04-20 Rearden, Llc System and method for distributed antenna wireless communications
US10886979B2 (en) 2004-04-02 2021-01-05 Rearden, Llc System and method for link adaptation in DIDO multicarrier systems
US11451275B2 (en) 2004-04-02 2022-09-20 Rearden, Llc System and method for distributed antenna wireless communications
US11394436B2 (en) 2004-04-02 2022-07-19 Rearden, Llc System and method for distributed antenna wireless communications
US8542763B2 (en) 2004-04-02 2013-09-24 Rearden, Llc Systems and methods to coordinate transmissions in distributed wireless systems via user clustering
US11309943B2 (en) 2004-04-02 2022-04-19 Rearden, Llc System and methods for planned evolution and obsolescence of multiuser spectrum
US9819403B2 (en) 2004-04-02 2017-11-14 Rearden, Llc System and method for managing handoff of a client between different distributed-input-distributed-output (DIDO) networks based on detected velocity of the client
US10749582B2 (en) 2004-04-02 2020-08-18 Rearden, Llc Systems and methods to coordinate transmissions in distributed wireless systems via user clustering
US10200094B2 (en) 2004-04-02 2019-02-05 Rearden, Llc Interference management, handoff, power control and link adaptation in distributed-input distributed-output (DIDO) communication systems
US9826537B2 (en) 2004-04-02 2017-11-21 Rearden, Llc System and method for managing inter-cluster handoff of clients which traverse multiple DIDO clusters
US8654815B1 (en) 2004-04-02 2014-02-18 Rearden, Llc System and method for distributed antenna wireless communications
US9312929B2 (en) 2004-04-02 2016-04-12 Rearden, Llc System and methods to compensate for Doppler effects in multi-user (MU) multiple antenna systems (MAS)
US10277290B2 (en) 2004-04-02 2019-04-30 Rearden, Llc Systems and methods to exploit areas of coherence in wireless systems
US10187133B2 (en) 2004-04-02 2019-01-22 Rearden, Llc System and method for power control and antenna grouping in a distributed-input-distributed-output (DIDO) network
US9685997B2 (en) 2007-08-20 2017-06-20 Rearden, Llc Systems and methods to enhance spatial diversity in distributed-input distributed-output wireless systems
KR101357644B1 (ko) * 2009-10-23 2014-02-05 한국전자통신연구원 무선 통신 시스템에서 데이터 송수신 방법 및 데이터 송수신 장치
US8532221B2 (en) * 2010-02-10 2013-09-10 Marvell World Trade Ltd. Transmission protection for wireless communications
US9585043B2 (en) 2010-04-13 2017-02-28 Interdigital Patent Holdings, Inc. Group transmissions in wireless local area networks
KR101760074B1 (ko) 2010-08-26 2017-07-20 마벨 월드 트레이드 리미티드 프라이머리 및 세컨더리 액세스 카테고리를 가진 무선 통신
US11189917B2 (en) 2014-04-16 2021-11-30 Rearden, Llc Systems and methods for distributing radioheads
US20150229372A1 (en) * 2014-02-07 2015-08-13 Rearden, Llc Systems and methods for mapping virtual radio instances into physical volumes of coherence in distributed antenna wireless systems
US11050468B2 (en) 2014-04-16 2021-06-29 Rearden, Llc Systems and methods for mitigating interference within actively used spectrum
US11190947B2 (en) 2014-04-16 2021-11-30 Rearden, Llc Systems and methods for concurrent spectrum usage within actively used spectrum
US10194346B2 (en) 2012-11-26 2019-01-29 Rearden, Llc Systems and methods for exploiting inter-cell multiplexing gain in wireless cellular systems via distributed input distributed output technology
US9973246B2 (en) 2013-03-12 2018-05-15 Rearden, Llc Systems and methods for exploiting inter-cell multiplexing gain in wireless cellular systems via distributed input distributed output technology
US9923657B2 (en) 2013-03-12 2018-03-20 Rearden, Llc Systems and methods for exploiting inter-cell multiplexing gain in wireless cellular systems via distributed input distributed output technology
US10164698B2 (en) 2013-03-12 2018-12-25 Rearden, Llc Systems and methods for exploiting inter-cell multiplexing gain in wireless cellular systems via distributed input distributed output technology
US10488535B2 (en) 2013-03-12 2019-11-26 Rearden, Llc Apparatus and method for capturing still images and video using diffraction coded imaging techniques
US10547358B2 (en) 2013-03-15 2020-01-28 Rearden, Llc Systems and methods for radio frequency calibration exploiting channel reciprocity in distributed input distributed output wireless communications
WO2015042896A1 (fr) 2013-09-29 2015-04-02 华为技术有限公司 Procédé et dispositif de transmission de données
US11290162B2 (en) 2014-04-16 2022-03-29 Rearden, Llc Systems and methods for mitigating interference within actively used spectrum
KR102216662B1 (ko) * 2014-05-26 2021-02-18 주식회사 윌러스표준기술연구소 데이터 동시 송수신을 위한 무선 통신 방법 및 이를 이용한 무선 통신 장치
US10021722B2 (en) 2014-06-08 2018-07-10 Lg Electronics Inc. Method and device for receiving frame in wireless LAN
KR102297140B1 (ko) 2014-06-27 2021-09-10 주식회사 윌러스표준기술연구소 데이터 동시 전송을 위한 무선 통신 방법 및 이를 이용한 무선 통신 단말
KR102117635B1 (ko) * 2014-07-01 2020-06-02 주식회사 윌러스표준기술연구소 무선 통신 방법 및 무선 통신 단말
CN106605382B (zh) 2014-08-27 2020-11-06 Lg 电子株式会社 在无线通信系统中的发送数据的方法及用于其装置
KR101657884B1 (ko) 2014-09-18 2016-09-20 한국과학기술원 통신 자원의 효율 개선을 위한 rts/cts 핸드쉐이킹 방법
WO2016043551A1 (fr) * 2014-09-18 2016-03-24 한국과학기술원 Procédé d'établissement d'une liaison rts/cts permettant d'améliorer l'efficacité de ressources de communication
WO2016056854A2 (fr) * 2014-10-08 2016-04-14 주식회사 윌러스표준기술연구소 Procédé et terminal de communication sans fil
US9706534B2 (en) * 2014-12-03 2017-07-11 Intel IP Corporation Apparatus, method, and computer readable media for uplink transmission opportunity in a high-efficiency wireless local-area network
KR102423848B1 (ko) 2014-12-31 2022-07-22 주식회사 윌러스표준기술연구소 다중 사용자 상향 전송을 위한 무선 통신 단말 및 무선 통신 방법
US9942843B2 (en) 2015-07-01 2018-04-10 Intel IP Corporation Determining a network allocation vector setting and a response to a multi-user transmission opportunity
US9942920B2 (en) 2015-07-01 2018-04-10 Intel IP Corporation Trigger frame response with network allocation vector
IL264337B (en) 2016-07-21 2022-07-01 Interdigital Patent Holdings Inc Multiple input multiple output (mimo) setup in millimeter wave (mmw) wlan systems
US10135504B2 (en) * 2016-10-14 2018-11-20 Qualcomm Incorporated Techniques for MU-MIMO sounding sequence protection

Citations (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010045237A (ko) 1999-11-03 2001-06-05 오길록 인터넷 멀티캐스트 응용에서의 그룹 멤버쉽 관리방법
KR20020079793A (ko) 2000-01-20 2002-10-19 노오텔 네트웍스 리미티드 고속 데이터를 전송하는 가변 레이트 무선 채널을 위한프레임 구조
JP2003134139A (ja) 2001-10-22 2003-05-09 Fujitsu Ltd 伝送ユニット及び伝送ネットワーク
US20040054655A1 (en) 2000-08-31 2004-03-18 Mosaid Technologies, Inc. Method and apparatus for searching a filtering database with one search operation
US20040229624A1 (en) 2003-05-12 2004-11-18 Motorola, Inc. Adapting a diversity transmission mode in a wireless communication system
WO2005002141A1 (fr) 2003-06-27 2005-01-06 Mitsubishi Denki Kabushiki Kaisha Appareil de transmission, appareil de reception et appareil de radiocommunication
KR20050059304A (ko) 2002-10-25 2005-06-17 해리스 코포레이션 애드 혹 무선시스템 내에 링크를 설치하는 방법 및 장치
US20050141420A1 (en) 2003-12-24 2005-06-30 Qinghua Li Transmission coordination for SDMA downlink communication
US20050147023A1 (en) 2003-12-30 2005-07-07 Intel Corporation Method and apparatus for implementing downlink SDMA in a wireless network
JP2005229448A (ja) 2004-02-16 2005-08-25 Mitsubishi Electric Corp 宇宙通信転送装置、衛星及び地上局
JP2005529403A (ja) 2002-06-10 2005-09-29 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ マイクロコントローラユニットの動作を監視する方法およびベースチップ
US20050233776A1 (en) 2004-04-16 2005-10-20 Allen Andrew M Method and apparatus for dynamic group address creation
US20050272441A1 (en) 2001-07-11 2005-12-08 Bates Cary L Method, apparatus and system for notifying a user of a portable wireless device
US20060078001A1 (en) 2004-10-08 2006-04-13 Interdigital Technology Corporation Wireless local area network medium access control extensions for station power efficiency and resource management
WO2006043773A2 (fr) 2004-10-18 2006-04-27 Lg Electronics Inc. Procede de transmission d'information de retour sur systeme de communications mobiles a multiplexage par repartition orthogonale de la frequence (mrof)/acces mrof
KR20060045799A (ko) 2004-04-16 2006-05-17 리서치 인 모션 리미티드 동적 그룹 어드레스 생성 방법 및 장치
US20060140186A1 (en) 2004-12-29 2006-06-29 Logalbo Robert D Methods for delivery in a wireless communications network
KR20060081329A (ko) 2005-01-07 2006-07-12 삼성전자주식회사 이동통신 시스템에서 다중 사용자 패킷 송/수신 장치 및방법
US20060239213A1 (en) 2005-03-07 2006-10-26 Airgo Networks, Inc. Block ack protocols for wireless packet network
WO2006115999A2 (fr) 2005-04-25 2006-11-02 Interdigital Technology Corporation Procede et systeme permettant d'effectuer un adressage efficient et des economies d'energie efficaces dans des systemes sans fil
US20070127478A1 (en) 2005-11-04 2007-06-07 Nokia Corporation Flexible multicast and/or broadcast listening intervals
US20070147284A1 (en) 2005-09-21 2007-06-28 Interdigital Technology Corporation Method and apparatus for transmission management in a wireless communication system
US20070153830A1 (en) * 2006-01-05 2007-07-05 Xhafa Ariton E Methods and apparatus to provide fairness for wireless local area networks that use extended physical layer protection mechanisms
JP2007214856A (ja) 2006-02-09 2007-08-23 Nippon Telegr & Teleph Corp <Ntt> 無線通信システム及び方法
WO2007099436A2 (fr) 2006-02-28 2007-09-07 Nokia Corporation Signalisation d'adresse de groupe de multidiffusion à l'aide d'un en-tête mac pour la distribution en mode économie d'énergie dans un réseau sans fil
JP2007286922A (ja) 2006-04-17 2007-11-01 Toshiba Corp グループ認証システム
US20070263528A1 (en) 2006-05-10 2007-11-15 Nortel Networks Limited Methods and systems for scheduling OFDM frames
US20080002636A1 (en) 2006-06-28 2008-01-03 Hitachi, Ltd. Multi-user MAC protocol for a local area network
JP2008502275A (ja) 2004-06-19 2008-01-24 サムスン エレクトロニクス カンパニー リミテッド 無線通信システムにおけるトラフィック表示メッセージを伝送する方法及び基地局とこれを受信する方法及び端末とそのメッセージ構造
US20080062178A1 (en) 2006-09-11 2008-03-13 Aamod Khandekar Voip group resource management
US7352718B1 (en) 2003-07-22 2008-04-01 Cisco Technology, Inc. Spatial division multiple access for wireless networks
US20080089354A1 (en) 2006-08-04 2008-04-17 Lg Electronics Inc. Bandwidth-efficient control and bitmap signaling using super position coding in wireless communication systems
US20080146253A1 (en) 2006-12-19 2008-06-19 Conexant Systems, Inc. Systems and methods for retrieving buffered data from an access point
WO2008080279A1 (fr) 2006-12-29 2008-07-10 Alcatel Lucent Procédé d'assistance et dispositifs correspondants pour la configuration des noeuds dans un groupe d'unidiffusion aléatoire
US20080181161A1 (en) 2007-01-25 2008-07-31 Lg Electronics Inc. Method of transmitting and receiving multicast data
WO2008104095A1 (fr) 2007-02-27 2008-09-04 Thomson Licensing Procédé et appareil pour une gestion de puissance dans un réseau local sans fil
JP2008278455A (ja) 2007-04-04 2008-11-13 Ntt Docomo Inc 無線基地局、移動局、無線通信システム、及び無線通信方法
US7463645B2 (en) * 2005-01-21 2008-12-09 Agere Systems Inc. Medium reservation with channel selectivity
EP2019506A2 (fr) 2002-12-16 2009-01-28 Electronics and Telecommunications Research Institute Procédé de conception de trame MAC dans un système de communication sans fil et produit de programme informatique correspondant
US20090031185A1 (en) * 2007-07-23 2009-01-29 Texas Instruments Incorporated Hybrid arq systems and methods for packet-based networks
KR20090012199A (ko) 2007-07-25 2009-02-02 엘지전자 주식회사 디지털 방송 시스템 및 데이터 처리 방법
US20090040990A1 (en) * 2007-08-09 2009-02-12 Texas Instruments Incorporated Systems and methods for avoiding avalanche effect in coexisting wireless networks
US20090059792A1 (en) * 2007-08-30 2009-03-05 Katsutoshi Itoh Wireless Communication Device, Wireless Communication System, Wireless Communication Method, and Program
US20090067438A1 (en) 2007-09-11 2009-03-12 Yasushi Tsukamoto Method, apparatus and program for transferring data
US20090141726A1 (en) 2007-12-03 2009-06-04 Institute For Information Industry Network address assignment method and routing method for a long thin zigbee network
US20090154418A1 (en) 2007-12-17 2009-06-18 Samsung Electronics Co. Ltd. Apparatus and method for dynamic resource allocation in broadband wireless communication system
WO2009114379A1 (fr) 2008-03-10 2009-09-17 Motorola, Inc. Structure hiérarchique de pilotes dans des systèmes de communication sans fil
US20100067409A1 (en) * 2003-04-28 2010-03-18 Sony Corporation Communication system, a communication method, and a communication apparatus
KR20100050633A (ko) 2008-11-06 2010-05-14 삼성전자주식회사 다중 사용자 다중 입력 다중 출력 시스템의 하이브리드 자동 재전송 요청 장치 및 방법
US20100220813A1 (en) * 2009-02-27 2010-09-02 Qualcomm Incorporated Protocol operation and message design for sdma data transmission to a plurality of stations
US20100238850A1 (en) 2009-03-23 2010-09-23 Qualcomm Incorporated Ap to legacy station sdma protocol
US20100310003A1 (en) 2009-06-05 2010-12-09 Broadcom Corporation Transmission acknowledgment within multiple user, multiple access, and/or mimo wireless communications
US20110002219A1 (en) 2009-06-05 2011-01-06 Broadcom Corporation Group identification and definition within multiple user, multiple access, and/or mimo wireless communications
US20110096797A1 (en) 2009-10-23 2011-04-28 Hongyuan Zhang Training sequence indication for wlan
US20110103280A1 (en) 2009-11-03 2011-05-05 Yong Liu Power Saving in a Communication Device
US20110110454A1 (en) 2009-11-06 2011-05-12 Qualcomm Incorporated Mixed mode preamble design for signaling number of streams per client
US20110110351A1 (en) * 2008-06-18 2011-05-12 Yong Ho Seok Channel access method for very high throughput (vht) wireless local access network system and station supporting the channel access method
US20110128900A1 (en) * 2008-07-31 2011-06-02 Yong Ho Seok Method of performing power save multi-poll (psmp) procedure wireless local access network system and station supporting the procedure
US20120002634A1 (en) * 2009-03-16 2012-01-05 Yong Ho Seok Method of allocating radio resource
US20120014336A1 (en) * 2009-02-18 2012-01-19 Yong Ho Seok Channel access method for very high throughput (vht) wireless local access network system
US20120120931A1 (en) 2010-05-16 2012-05-17 Qualcomm Incorporated Efficient group id management for wireless local area networks (wlans)
US20120153483A1 (en) 2010-12-20 2012-06-21 Akolkar Rohan N Barrierless single-phase interconnect
US20120163483A1 (en) 2010-12-22 2012-06-28 Stacey Robert J Mu-mimo access point and user station including methods for multi-user group management
US20120230242A1 (en) 2009-11-24 2012-09-13 Electronics And Telecommunications Research Institute Methods for transmitting a frame in a multi-user based wireless communication system
US20130157578A1 (en) * 2006-06-06 2013-06-20 Qualcomm Incorporated Apparatus and method for wireless communication via at least one of directional and omni-direction antennas
US8532221B2 (en) * 2010-02-10 2013-09-10 Marvell World Trade Ltd. Transmission protection for wireless communications
US8582489B2 (en) * 2009-11-24 2013-11-12 Electronics And Telecommunications Research Institute Method for recovering a frame that failed to be transmitted in a mu-mimo based wireless communication system
US8599804B2 (en) * 2009-08-07 2013-12-03 Broadcom Corporation Distributed signal field for communications within multiple user, multiple access, and/or MIMO wireless communications
US8605692B2 (en) * 2009-01-15 2013-12-10 Electronics And Telecommunications Research Institute Method for setting transmission opportunity and for transmitting and receiving data in wireless LAN system using multiple channel
US8787328B2 (en) * 2011-07-05 2014-07-22 Seoul National University R&Db Foundation Method and apparatus for reserving data channel in a wireless access system
US8848680B2 (en) * 2009-12-03 2014-09-30 Lg Electronics Inc. Method and apparatus for transmitting a frame in a wireless RAN system
US8917743B2 (en) * 2010-10-06 2014-12-23 Samsung Electronics Co., Ltd. Method and system for enhanced contention avoidance in multi-user multiple-input-multiple-output wireless networks
US8937912B2 (en) * 2008-07-31 2015-01-20 Google Technology Holdings LLC System and method using multiple request to send (RTS) messages to enhance wireless communication resource allocation
US8948150B1 (en) 2009-05-01 2015-02-03 Marvell International Ltd. Open loop multiple access for WLAN
US9025544B2 (en) * 2010-02-10 2015-05-05 Lg Electronics Inc. Channel access method and apparatus in wireless local area network system
US9113479B2 (en) * 2008-10-15 2015-08-18 Lg Electronics Inc. Method for multicast frame transmission and duplicated multicast frame detection
US9369918B2 (en) * 2011-06-24 2016-06-14 Interdigital Patent Holdings, Inc. Method and apparatus for supporting wideband and multiple bandwidth transmission protocols
US9564999B2 (en) * 2008-12-12 2017-02-07 Lg Electronics Inc. Space division multiple access for wireless LAN, and channel estimation for the same

Patent Citations (97)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6529882B1 (en) 1999-11-03 2003-03-04 Electronics And Telecommunications Research Institute Method for managing group membership in internet multicast applications
KR20010045237A (ko) 1999-11-03 2001-06-05 오길록 인터넷 멀티캐스트 응용에서의 그룹 멤버쉽 관리방법
KR20020079793A (ko) 2000-01-20 2002-10-19 노오텔 네트웍스 리미티드 고속 데이터를 전송하는 가변 레이트 무선 채널을 위한프레임 구조
US20040054655A1 (en) 2000-08-31 2004-03-18 Mosaid Technologies, Inc. Method and apparatus for searching a filtering database with one search operation
US20050272441A1 (en) 2001-07-11 2005-12-08 Bates Cary L Method, apparatus and system for notifying a user of a portable wireless device
JP2003134139A (ja) 2001-10-22 2003-05-09 Fujitsu Ltd 伝送ユニット及び伝送ネットワーク
JP2005529403A (ja) 2002-06-10 2005-09-29 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ マイクロコントローラユニットの動作を監視する方法およびベースチップ
KR20050059304A (ko) 2002-10-25 2005-06-17 해리스 코포레이션 애드 혹 무선시스템 내에 링크를 설치하는 방법 및 장치
EP2019506A2 (fr) 2002-12-16 2009-01-28 Electronics and Telecommunications Research Institute Procédé de conception de trame MAC dans un système de communication sans fil et produit de programme informatique correspondant
US20100067409A1 (en) * 2003-04-28 2010-03-18 Sony Corporation Communication system, a communication method, and a communication apparatus
US7701920B2 (en) * 2003-04-28 2010-04-20 Sony Corporation Communication system, a communication method, and a communication apparatus for carrying out data communication among a plurality of communication stations
US20040229624A1 (en) 2003-05-12 2004-11-18 Motorola, Inc. Adapting a diversity transmission mode in a wireless communication system
WO2005002141A1 (fr) 2003-06-27 2005-01-06 Mitsubishi Denki Kabushiki Kaisha Appareil de transmission, appareil de reception et appareil de radiocommunication
US7352718B1 (en) 2003-07-22 2008-04-01 Cisco Technology, Inc. Spatial division multiple access for wireless networks
US20050141420A1 (en) 2003-12-24 2005-06-30 Qinghua Li Transmission coordination for SDMA downlink communication
US20050147023A1 (en) 2003-12-30 2005-07-07 Intel Corporation Method and apparatus for implementing downlink SDMA in a wireless network
JP2005229448A (ja) 2004-02-16 2005-08-25 Mitsubishi Electric Corp 宇宙通信転送装置、衛星及び地上局
KR20060045799A (ko) 2004-04-16 2006-05-17 리서치 인 모션 리미티드 동적 그룹 어드레스 생성 방법 및 장치
US20050233776A1 (en) 2004-04-16 2005-10-20 Allen Andrew M Method and apparatus for dynamic group address creation
JP2008502275A (ja) 2004-06-19 2008-01-24 サムスン エレクトロニクス カンパニー リミテッド 無線通信システムにおけるトラフィック表示メッセージを伝送する方法及び基地局とこれを受信する方法及び端末とそのメッセージ構造
US20060078001A1 (en) 2004-10-08 2006-04-13 Interdigital Technology Corporation Wireless local area network medium access control extensions for station power efficiency and resource management
WO2006043773A2 (fr) 2004-10-18 2006-04-27 Lg Electronics Inc. Procede de transmission d'information de retour sur systeme de communications mobiles a multiplexage par repartition orthogonale de la frequence (mrof)/acces mrof
JP2008517518A (ja) 2004-10-18 2008-05-22 エルジー エレクトロニクス インコーポレイティド Ｏｆｄｍまたはｏｆｄｍａ移動通信システムにおけるフィードバック情報送信方法
US20060140186A1 (en) 2004-12-29 2006-06-29 Logalbo Robert D Methods for delivery in a wireless communications network
KR20060081329A (ko) 2005-01-07 2006-07-12 삼성전자주식회사 이동통신 시스템에서 다중 사용자 패킷 송/수신 장치 및방법
US7463645B2 (en) * 2005-01-21 2008-12-09 Agere Systems Inc. Medium reservation with channel selectivity
US20060239213A1 (en) 2005-03-07 2006-10-26 Airgo Networks, Inc. Block ack protocols for wireless packet network
US20090296619A1 (en) 2005-04-25 2009-12-03 Interdigital Technology Corporation Method and system for efficient addressing and power savings in wireless systems
KR20080006602A (ko) 2005-04-25 2008-01-16 인터디지탈 테크날러지 코포레이션 무선 시스템에서의 효율적인 어드레싱 및 전력 절감을 위한방법 및 시스템
US20060252443A1 (en) 2005-04-25 2006-11-09 Interdigital Technology Corporation Method and system for efficient addressing and power savings in wireless systems
WO2006115999A2 (fr) 2005-04-25 2006-11-02 Interdigital Technology Corporation Procede et systeme permettant d'effectuer un adressage efficient et des economies d'energie efficaces dans des systemes sans fil
JP2008539665A (ja) 2005-04-25 2008-11-13 インターデイジタル テクノロジー コーポレーション 無線通信システムにおける効率的なアドレス指定および電力節約のための方法およびシステム
US20070147284A1 (en) 2005-09-21 2007-06-28 Interdigital Technology Corporation Method and apparatus for transmission management in a wireless communication system
US20070127478A1 (en) 2005-11-04 2007-06-07 Nokia Corporation Flexible multicast and/or broadcast listening intervals
US20070153830A1 (en) * 2006-01-05 2007-07-05 Xhafa Ariton E Methods and apparatus to provide fairness for wireless local area networks that use extended physical layer protection mechanisms
JP2007214856A (ja) 2006-02-09 2007-08-23 Nippon Telegr & Teleph Corp <Ntt> 無線通信システム及び方法
WO2007099436A2 (fr) 2006-02-28 2007-09-07 Nokia Corporation Signalisation d'adresse de groupe de multidiffusion à l'aide d'un en-tête mac pour la distribution en mode économie d'énergie dans un réseau sans fil
JP2009528745A (ja) 2006-02-28 2009-08-06 ノキア コーポレイション 無線ネットワークにおける省電力配信のための、ｍａｃヘッダを使用するマルチキャストグループアドレス信号伝達
JP2007286922A (ja) 2006-04-17 2007-11-01 Toshiba Corp グループ認証システム
US20070263528A1 (en) 2006-05-10 2007-11-15 Nortel Networks Limited Methods and systems for scheduling OFDM frames
US20130157578A1 (en) * 2006-06-06 2013-06-20 Qualcomm Incorporated Apparatus and method for wireless communication via at least one of directional and omni-direction antennas
US20080002636A1 (en) 2006-06-28 2008-01-03 Hitachi, Ltd. Multi-user MAC protocol for a local area network
US20080089354A1 (en) 2006-08-04 2008-04-17 Lg Electronics Inc. Bandwidth-efficient control and bitmap signaling using super position coding in wireless communication systems
WO2008033860A2 (fr) 2006-09-11 2008-03-20 Qualcomm Incorporated Gestion de ressources de groupe voip
US20080062178A1 (en) 2006-09-11 2008-03-13 Aamod Khandekar Voip group resource management
US20080146253A1 (en) 2006-12-19 2008-06-19 Conexant Systems, Inc. Systems and methods for retrieving buffered data from an access point
WO2008080279A1 (fr) 2006-12-29 2008-07-10 Alcatel Lucent Procédé d'assistance et dispositifs correspondants pour la configuration des noeuds dans un groupe d'unidiffusion aléatoire
US20080181161A1 (en) 2007-01-25 2008-07-31 Lg Electronics Inc. Method of transmitting and receiving multicast data
WO2008104095A1 (fr) 2007-02-27 2008-09-04 Thomson Licensing Procédé et appareil pour une gestion de puissance dans un réseau local sans fil
JP2008278455A (ja) 2007-04-04 2008-11-13 Ntt Docomo Inc 無線基地局、移動局、無線通信システム、及び無線通信方法
US20090031185A1 (en) * 2007-07-23 2009-01-29 Texas Instruments Incorporated Hybrid arq systems and methods for packet-based networks
KR20090012199A (ko) 2007-07-25 2009-02-02 엘지전자 주식회사 디지털 방송 시스템 및 데이터 처리 방법
US20090040990A1 (en) * 2007-08-09 2009-02-12 Texas Instruments Incorporated Systems and methods for avoiding avalanche effect in coexisting wireless networks
US20090059792A1 (en) * 2007-08-30 2009-03-05 Katsutoshi Itoh Wireless Communication Device, Wireless Communication System, Wireless Communication Method, and Program
US20090067438A1 (en) 2007-09-11 2009-03-12 Yasushi Tsukamoto Method, apparatus and program for transferring data
US20090141726A1 (en) 2007-12-03 2009-06-04 Institute For Information Industry Network address assignment method and routing method for a long thin zigbee network
US20090154418A1 (en) 2007-12-17 2009-06-18 Samsung Electronics Co. Ltd. Apparatus and method for dynamic resource allocation in broadband wireless communication system
WO2009114379A1 (fr) 2008-03-10 2009-09-17 Motorola, Inc. Structure hiérarchique de pilotes dans des systèmes de communication sans fil
US9526114B2 (en) * 2008-06-18 2016-12-20 Lg Electronics Inc. Channel access method for very high throughput (VHT) wireless local access network system and station supporting the channel access method
US8989158B2 (en) * 2008-06-18 2015-03-24 Lg Electronics Inc. Channel access method for very high throughput (VHT) wireless local access network system and station supporting the channel access method
US20110110351A1 (en) * 2008-06-18 2011-05-12 Yong Ho Seok Channel access method for very high throughput (vht) wireless local access network system and station supporting the channel access method
US8937912B2 (en) * 2008-07-31 2015-01-20 Google Technology Holdings LLC System and method using multiple request to send (RTS) messages to enhance wireless communication resource allocation
US20110128900A1 (en) * 2008-07-31 2011-06-02 Yong Ho Seok Method of performing power save multi-poll (psmp) procedure wireless local access network system and station supporting the procedure
US9113479B2 (en) * 2008-10-15 2015-08-18 Lg Electronics Inc. Method for multicast frame transmission and duplicated multicast frame detection
KR20100050633A (ko) 2008-11-06 2010-05-14 삼성전자주식회사 다중 사용자 다중 입력 다중 출력 시스템의 하이브리드 자동 재전송 요청 장치 및 방법
US9564999B2 (en) * 2008-12-12 2017-02-07 Lg Electronics Inc. Space division multiple access for wireless LAN, and channel estimation for the same
US8605692B2 (en) * 2009-01-15 2013-12-10 Electronics And Telecommunications Research Institute Method for setting transmission opportunity and for transmitting and receiving data in wireless LAN system using multiple channel
US8948102B2 (en) * 2009-02-18 2015-02-03 Lg Electronics Inc. Channel access method for very high throughput (VHT) wireless local access network system
US20120014336A1 (en) * 2009-02-18 2012-01-19 Yong Ho Seok Channel access method for very high throughput (vht) wireless local access network system
US20100220813A1 (en) * 2009-02-27 2010-09-02 Qualcomm Incorporated Protocol operation and message design for sdma data transmission to a plurality of stations
US20120002634A1 (en) * 2009-03-16 2012-01-05 Yong Ho Seok Method of allocating radio resource
US20100238850A1 (en) 2009-03-23 2010-09-23 Qualcomm Incorporated Ap to legacy station sdma protocol
US8948150B1 (en) 2009-05-01 2015-02-03 Marvell International Ltd. Open loop multiple access for WLAN
US20100310003A1 (en) 2009-06-05 2010-12-09 Broadcom Corporation Transmission acknowledgment within multiple user, multiple access, and/or mimo wireless communications
US9197298B2 (en) * 2009-06-05 2015-11-24 Broadcom Corporation Group identification and definition within multiple user, multiple access, and/or MIMO wireless communications
US20110002219A1 (en) 2009-06-05 2011-01-06 Broadcom Corporation Group identification and definition within multiple user, multiple access, and/or mimo wireless communications
US9107099B2 (en) * 2009-08-07 2015-08-11 Broadcom Corporation Distributed signal field for communications within multiple user, multiple access, and/or MIMO wireless communications
US8599804B2 (en) * 2009-08-07 2013-12-03 Broadcom Corporation Distributed signal field for communications within multiple user, multiple access, and/or MIMO wireless communications
US20110096797A1 (en) 2009-10-23 2011-04-28 Hongyuan Zhang Training sequence indication for wlan
WO2011056790A1 (fr) 2009-11-03 2011-05-12 Marvell World Trade Ltd. Economie d'énergie dans un dispositif de communication
US20110103280A1 (en) 2009-11-03 2011-05-05 Yong Liu Power Saving in a Communication Device
US20110110454A1 (en) 2009-11-06 2011-05-12 Qualcomm Incorporated Mixed mode preamble design for signaling number of streams per client
WO2011057009A2 (fr) 2009-11-06 2011-05-12 Qualcomm Incorporated Conception de préambule en mode mixte pour signaler un nombre de flux par client
US20120230242A1 (en) 2009-11-24 2012-09-13 Electronics And Telecommunications Research Institute Methods for transmitting a frame in a multi-user based wireless communication system
US10230435B2 (en) 2009-11-24 2019-03-12 Electronics And Telecommunications Research Institute Method for recovering a frame that failed to be transmitted in a MU-MIMO based wireless communication system
US8582489B2 (en) * 2009-11-24 2013-11-12 Electronics And Telecommunications Research Institute Method for recovering a frame that failed to be transmitted in a mu-mimo based wireless communication system
US8989161B2 (en) * 2009-11-24 2015-03-24 Electronics And Telecommunications Research Institute Methods for transmitting a frame in a multi-user based wireless communication system
JP2016189602A (ja) 2009-11-24 2016-11-04 エレクトロニクス アンド テレコミュニケーションズ リサーチ インスチチュートＥｌｅｃｔｒｏｎｉｃｓ Ａｎｄ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｒｅｓｅａｒｃｈ Ｉｎｓｔｉｔｕｔｅ マルチユーザベースの無線通信システムにおけるフレーム送信方法
US8848680B2 (en) * 2009-12-03 2014-09-30 Lg Electronics Inc. Method and apparatus for transmitting a frame in a wireless RAN system
US9025544B2 (en) * 2010-02-10 2015-05-05 Lg Electronics Inc. Channel access method and apparatus in wireless local area network system
US8532221B2 (en) * 2010-02-10 2013-09-10 Marvell World Trade Ltd. Transmission protection for wireless communications
US20120120931A1 (en) 2010-05-16 2012-05-17 Qualcomm Incorporated Efficient group id management for wireless local area networks (wlans)
US8917743B2 (en) * 2010-10-06 2014-12-23 Samsung Electronics Co., Ltd. Method and system for enhanced contention avoidance in multi-user multiple-input-multiple-output wireless networks
US20120153483A1 (en) 2010-12-20 2012-06-21 Akolkar Rohan N Barrierless single-phase interconnect
US20120163483A1 (en) 2010-12-22 2012-06-28 Stacey Robert J Mu-mimo access point and user station including methods for multi-user group management
US9369918B2 (en) * 2011-06-24 2016-06-14 Interdigital Patent Holdings, Inc. Method and apparatus for supporting wideband and multiple bandwidth transmission protocols
US8787328B2 (en) * 2011-07-05 2014-07-22 Seoul National University R&Db Foundation Method and apparatus for reserving data channel in a wireless access system

Non-Patent Citations (71)

* Cited by examiner, † Cited by third party
Title
Chi-Hsiang Yeh, "Media Access Control for Real-time Communications in Consumer Electronics Networks", 2009 International Conference on New Trends in Information and Service Science, Jul. 2, 2009, 2009, pp. 715-718, IEEE Computer Society.
European Search Report for Application No. EP 10 83 3555 of Oct. 10, 2012.
European Search Report for EP Application No. 15157776.4 dated Jun. 17, 2015.
Final office action dated Jun. 25, 2021 for U.S. Appl. No. 16/244,107.
Final office action dated Jun. 4, 2020 for U.S. Appl. No. 16/244,107.
Final Office Action for U.S. Appl. No. 13/478,069 dated May 30, 2013.
Final Office Action for U.S. Appl. No. 14/051,355 dated Apr. 13, 2017.
Final Office Action for U.S. Appl. No. 14/051,355 dated Dec. 30, 2015.
Guido R. Hiertz et al., "Mesh Networks Alliance Proposal", IEEE, Nov. 7, 2005, pp. 1-46, vol. 802.11.
Hongyuan Zhang et al., "802.11ac Preamble", IEEE 802.11-10/0070r0, Jan. 18, 2 010, Slides 1-11.
Hrishikesh Gossain et al., "Supporting MAC Layer Multicast in IEEE 802.11 based MANETs: Issues and Solutions", IEEE Computer Society, 2004.
International Search Report for PCT/KR2010/008351 dated Nov. 24, 2010.
International Search Report for PCT/KR2010/008355 dated Nov. 24, 2010.
International Search Report for PCT/KR2010/008361 dated Nov. 24, 2010.
James Gross et al., "Dynamic Multi-user OFDM for 802.11 systems", Jul. 15, 2007, IEEE.
Joonsuk Kim et al., "GroupID Concept for Downlink MU-MIMO Transmission", IEEE 802.11-10/0073r0, Jan. 18, 2010, pp. 1-8.
Joonsuk Kim et al., "GroupID in VHT-SIG Field", IEEE 802.11-10/0582r0, May 17, 2010, pp. 1-5.
Mohamed Kamoun, "Efficient backward compatible allocation mechanism for multi-user CSMA/CA schemes", 2009 First International Conference on Communications and Networking, Nov. 6, 2009, pp. 1-6, IEEE.
Non-Final office action and list of references dated Oct. 28, 2019 for U.S. Appl. No. 16/244,107.
Non-Final office action dated Aug. 7, 2019 for U.S. Appl. No. 15/937,590.
Non-Final office action dated Dec. 1, 2020 for U.S. Appl. No. 16/244,107.
Non-Final Office Action dated Nov. 23, 2022 for U.S. Appl. No. 17/838,212.
Non-final Office Action for U.S. Appl. No. 13/478,069 dated Aug. 1, 2012.
Non-final Office Action for U.S. Appl. No. 13/478,069 dated Feb. 5, 2013.
Non-final Office Action for U.S. Appl. No. 13/479,165 dated Mar. 6, 2013.
Non-final Office Action for U.S. Appl. No. 13/479,165 dated Oct. 2, 2012.
Non-final Office Action for U.S. Appl. No. 13/511,363 dated Jan. 17, 2014.
Non-final Office Action for U.S. Appl. No. 14/051,355 dated May 21, 2015.
Non-final Office Action for U.S. Appl. No. 14/051,355 dated Nov. 16, 2017.
Non-final Office Action for U.S. Appl. No. 14/051,355 dated Sep. 8, 2016.
Non-final Office Action for U.S. Appl. No. 14/633,036 dated Jul. 13, 2017.
Notice of Allowance dated Feb. 26, 2020 for U.S. Appl. No. 15/937,590.
Notice of Allowance dated Jul. 1, 2020 for U.S. Appl. No. 15/937,590.
Notice of Allowance for U.S. Appl. No. 13/478,069 dated Jan. 30, 2015.
Notice of Allowance for U.S. Appl. No. 13/478,069 dated Nov. 14, 2014.
Notice of Allowance for U.S. Appl. No. 13/479,165 dated Jul. 10, 2013.
Notice of Allowance for U.S. Appl. No. 13/479,165 dated Sep. 20, 2013.
Notice of Allowance for U.S. Appl. No. 13/511,363 dated Jun. 13, 2014.
Notice of Allowance for U.S. Appl. No. 14/051,355 dated Dec. 20, 2018.
Notice of Allowance for U.S. Appl. No. 14/051,355 dated Feb. 8, 2019.
Notice of Allowance for U.S. Appl. No. 14/051,355 dated May 17, 2018.
Notice of Allowance for U.S. Appl. No. 14/051,355 dated Oct. 11, 2018.
Notice of Allowance for U.S. Appl. No. 14/051,355 dated Oct. 30, 2018.
Notice of Allowance for U.S. Appl. No. 14/633,036 dated Jan. 29, 2018.
Notice of Allowance for U.S. Appl. No. 14/633,036 dated Mar. 30, 2017.
Notice of Allowance for U.S. Appl. No. 14/633,036 dated Nov. 22, 2017.
Office Action and List of References for U.S. Appl. No. 13/478,069 dated Feb. 5, 2013.
Office Action and List of References for U.S. Appl. No. 13/478,069 dated May 30, 2013.
Office Action and List of References for U.S. Appl. No. 13/479,165 dated Mar. 6, 2013 from the United States Patent and Trademark Office.
Office Action and List of References for U.S. Appl. No. 13/479,165 dated Oct. 2, 2012.
Office Action and List of References for U.S. Appl. No. 13/511,363 dated Jan. 17, 2014.
Office Action and List of References for U.S. Appl. No. 13/511,363 dated Jun. 13, 2014.
Robert Novak, et al., Proposal for IEEE 802.16m VoIP Resource Allocation and Control Structure, IEEE C802.16m-08/177, Mar. 10, 2008.
Sameer Vermani et al., "Frame Format for GroupID Management", IEEE 802.11-10/1288r1, Nov. 8, 2010, pp. 1-7.
Shweta Shrivastava et al., Additional material related to the Recommended AWD Text Proposal #8 in C802.16m-09/0558 (Group Scheduling), IEEE C802.16m-09/0700, Mar. 7, 2009.
Trial Decision (affirming patent office's decision to reject) issued Jan. 15, 2019 for Korean Application No. 10-2016-0083526.
U.S. Appl. No. 13/478,069, filed Feb. 22, 2012 (issued as U.S. Pat. No. 8,989,161 dated Mar. 24, 2015).
U.S. Appl. No. 13/478,069, filed Feb. 22, 2012 (now U.S. Pat. No. 8,989,161).
U.S. Appl. No. 13/479,165, filed May 23, 2012 (issued as U.S. Pat. No. 8,582,489 dated Nov. 12, 2013).
U.S. Appl. No. 13/479,165, filed May 23, 2012 (now U.S. Pat. No. 8,582,489).
U.S. Appl. No. 13/511,363, filed May 22, 2012 (issued as U.S. Pat. No. 8,861,495 dated Oct. 14, 2014).
U.S. Appl. No. 13/511,363, filed May 22, 2012 (now U.S. Pat. No. 8,861,495).
U.S. Appl. No. 14/051,355, filed Oct. 10, 2013 (issued as U.S. Pat. No. 10,230,435 dated Mar. 12, 2019).
U.S. Appl. No. 14/051,355, filed Oct. 10, 2013 (now U.S. Pat. No. 10,230,435).
U.S. Appl. No. 14/633,036, filed Feb. 26, 2015 (issued as U.S. Pat. No. 9,929,784 dated Mar. 27, 2018).
U.S. Appl. No. 14/633,036, filed Feb. 26, 2015 (now U.S. Pat. No. 9,929,784).
U.S. Appl. No. 15/937,590, filed Mar. 27, 2018 (now pending).
U.S. Appl. No. 15/937,590, filed Mar. 27, 2018.
U.S. Appl. No. 16/244,107, filed Jan. 10, 2019 (now pending).
U.S. Appl. No. 16/244,107, filed Jan. 10, 2019.
Xiaoli Wang et al., "Supporting MAC Layer Multicast in IEEE 802.11n: Issues and Solutions", 2009, IEEE.

Also Published As

Publication number Publication date
KR20110058710A (ko) 2011-06-01
WO2011065749A3 (fr) 2011-11-10
US20120236840A1 (en) 2012-09-20
US8861495B2 (en) 2014-10-14
WO2011065749A2 (fr) 2011-06-03
KR101948082B1 (ko) 2019-04-25

Similar Documents

Publication Publication Date Title
USRE49471E1 (en) Method for protecting data in a mu-mimo based wireless communication system
US11742905B2 (en) Method for recovering a frame that failed to be transmitted in a MU-MIMO based wireless communication system
US10826575B2 (en) Methods for transmitting a frame in a multi-user based wireless communication system
KR101415271B1 (ko) 다중 사용자 기반 무선통신 시스템에서의 응답 요청 프레임 및 응답 프레임의 전송방법
KR101837966B1 (ko) 다중 사용자 다중 안테나 기반 무선통신 시스템에서 데이터 보호 방법