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WO2017023005A1 - Procédé de transmission de signal basé sur une association de canaux, et dispositif associé - Google Patents

Procédé de transmission de signal basé sur une association de canaux, et dispositif associé Download PDF

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Publication number
WO2017023005A1
WO2017023005A1 PCT/KR2016/008151 KR2016008151W WO2017023005A1 WO 2017023005 A1 WO2017023005 A1 WO 2017023005A1 KR 2016008151 W KR2016008151 W KR 2016008151W WO 2017023005 A1 WO2017023005 A1 WO 2017023005A1
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Prior art keywords
sta
channel
channels
signal
allocated
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English (en)
Korean (ko)
Inventor
박성진
김진민
조한규
박은성
조경태
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • 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

Definitions

  • the following description relates to channel bonding in a mobile communication system, and more particularly, to a method and apparatus for transmitting a signal based on channel bonding in an access point or station in a WLAN system. .
  • IEEE 802.11a and b are described in 2.4. Using unlicensed band at GHz or 5 GHz, IEEE 802.11b provides a transmission rate of 11 Mbps and IEEE 802.11a provides a transmission rate of 54 Mbps.
  • IEEE 802.11g applies orthogonal frequency-division multiplexing (OFDM) at 2.4 GHz to provide a transmission rate of 54 Mbps.
  • IEEE 802.11n applies multiple input multiple output OFDM (MIMO-OFDM) to provide a transmission rate of 300 Mbps for four spatial streams. IEEE 802.11n supports channel bandwidths up to 40 MHz, in this case providing a transmission rate of 600 Mbps.
  • the WLAN standard uses a maximum of 160MHz bandwidth, supports eight spatial streams, and supports IEEE 802.11ax standard through an IEEE 802.11ac standard supporting a speed of up to 1Gbit / s.
  • IEEE 802.11ad defines performance enhancement for ultra-high throughput in the 60 GHz band, and IEEE 802.11ay for channel bonding and MIMO technology is introduced for the first time in the IEEE 802.11ad system.
  • PPDU Physical Protocol Data Unit
  • signals transmitted and received to each STA may be different from each other. How to distinguish from these may be required.
  • MU multi-user
  • MIMO multi input multi output
  • the AP in a method in which an access point (AP) transmits a signal in a WLAN system, the AP provides M channels to the first station STA. And transmits a signal by allocating M channels to a second STA, and when two or more channels are allocated to at least one of the first STA and the second STA, the AP is configured to perform the first STA and the first STA.
  • the first channel when a signal is transmitted to at least one of 2 STAs through channel bonding or channel aggregation, and there is a duplicated first channel among the M channels and the N channels, The signal transmitted to the first STA and the signal transmitted to the second STA are distinguished from each other through precoding applied to each signal.
  • M, N is a natural number is applied.
  • Precoding for multi-stream transmission to the first STA and the second STA is applied to the first channel, and a signal only to the first STA is applied to a second channel that does not overlap the N channels among the M channels. Precoding for transmission may be applied.
  • the bandwidth of one channel may be 1.83 GHz.
  • M and N may be 4 applied. However, the maximum value may vary in the standardization process, and the present invention is not limited to a specific numerical value.
  • a guard tone is applied to a subcarrier adjacent to a subcarrier used for signal transmission to the second STA among subcarriers used for signal transmission to the first STA. Can be used as)
  • a total bandwidth of M channels used for signal transmission to the first STA may be greater than N times the bandwidth of one channel.
  • the signal transmitted by the AP to the first STA may include one or more of bandwidth information and channelization information allocated to the first STA.
  • the signal transmitted by the AP to the first STA may further include group identification information.
  • bandwidth information and channelization information allocated to the first STA may be included in a header for a first type STA or a header for a second type STA of a signal transmitted to the first STA.
  • bandwidth information and channelization information allocated to the first STA may be indicated by one or more bit indicators.
  • At least one of bandwidth information and channelization information allocated to the first STA is indicated by as many bit indicators as the maximum number of channels supported by the system, and each bit indicator indicates that a channel corresponding to each bit indicator is assigned to the first indicator. 1 may indicate whether the STA is allocated in an on / off manner.
  • the first STA in a method in which a first station (STA) transmits a signal to an access point (AP) in a WLAN system, the first STA has two or more channels from the AP.
  • the first STA transmits a signal to the AP through the allocated channel, but there is a duplicated first channel among the channel allocated to the first STA and the channel allocated to the second STA.
  • the present invention proposes a signal transmission method in which a signal transmitted by the first STA and a signal transmitted by the second STA are distinguished from each other through precoding applied to each signal in a first channel.
  • M channels are allocated to a first station (STA), and N channels are assigned to a second STA.
  • An AP transmits a signal to at least one of the first STA and the second STA through channel bonding or channel aggregation, and a first channel overlapping among the M channels and the N channels.
  • the signal transmitted to the first STA and the signal transmitted to the second STA in the first channel are configured to be distinguished from each other through precoding applied to each signal.
  • M, N is a natural number is applied.
  • a station for transmitting signals in a WLAN system
  • the transceiver comprising: a transceiver configured to transmit a signal; And a processor controlling the transceiver, wherein the processor receives two or more channels from an access point, and the processor controls the transceiver to transmit a signal through the allocated channel to the AP.
  • a station apparatus is proposed, which is configured to be distinguished from each other through precoding applied to a signal.
  • the present invention supports DL (Downlink) MU-MIMO in the 11ay system and when the access point (AP) transmits a signal to the first station (STA) through channel bonding or channel aggregation, It is possible to provide a method of distinguishing a signal transmitted to the first STA from other signals.
  • the present invention has the effect of improving system performance in a dense environment under consideration in the IEEE 802.11ay system.
  • FIG. 1 is a diagram illustrating an example of a configuration of a WLAN system.
  • FIG. 2 is a diagram illustrating another example of a configuration of a WLAN system.
  • FIG. 3 is a diagram for describing a channel in a 60 GHz band for explaining a channel bonding operation according to an embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a basic method of performing channel bonding in a WLAN system.
  • 5 is a diagram for explaining a physical configuration of an existing radio frame.
  • 6 and 7 are views for explaining the configuration of the header field of the radio frame of FIG.
  • FIG. 8 illustrates a PPDU structure applicable to the present invention.
  • FIGS. 9 and 10 are diagrams illustrating operating frequency bands used by a plurality of stations STA in accordance with the present invention.
  • FIG. 11 illustrates a PPDU structure according to an embodiment of the present invention.
  • FIG. 12 is a view for explaining an apparatus for implementing the method as described above.
  • the following description relates to a method and apparatus for transmitting data based on channel bonding in a mobile communication system.
  • a mobile communication system There may be various mobile communication systems to which the present invention is applied.
  • the WLAN system will be described in detail as an example of the mobile communication system.
  • FIG. 1 is a diagram illustrating an example of a configuration of a WLAN system.
  • the WLAN system includes one or more basic service sets (BSSs).
  • BSS is a set of stations (STAs) that can successfully synchronize and communicate with each other.
  • An STA is a logical entity that includes a medium access control (MAC) and a physical layer interface to a wireless medium.
  • the STA is an access point (AP) and a non-AP STA (Non-AP Station). Include.
  • the portable terminal operated by the user among the STAs is a non-AP STA, and when referred to simply as an STA, it may also refer to a non-AP STA.
  • a non-AP STA is a terminal, a wireless transmit / receive unit (WTRU), a user equipment (UE), a mobile station (MS), a mobile terminal, or a mobile subscriber. It may also be called another name such as a mobile subscriber unit.
  • the AP is an entity that provides an associated station (STA) coupled to the AP to access a distribution system (DS) through a wireless medium.
  • STA station
  • DS distribution system
  • the AP may be called a centralized controller, a base station (BS), a Node-B, a base transceiver system (BTS), a personal basic service set central point / access point (PCP / AP), or a site controller.
  • BSS can be divided into infrastructure BSS and Independent BSS (IBSS).
  • IBSS Independent BSS
  • the BBS shown in FIG. 1 is an IBSS.
  • the IBSS means a BSS that does not include an AP. Since the IBSS does not include an AP, access to the DS is not allowed, thereby forming a self-contained network.
  • FIG. 2 is a diagram illustrating another example of a configuration of a WLAN system.
  • the BSS shown in FIG. 2 is an infrastructure BSS.
  • Infrastructure BSS includes one or more STAs and APs.
  • communication between non-AP STAs is performed via an AP.
  • AP access point
  • a plurality of infrastructure BSSs may be interconnected through a DS.
  • a plurality of BSSs connected through a DS is called an extended service set (ESS).
  • STAs included in the ESS may communicate with each other, and a non-AP STA may move from one BSS to another BSS while seamlessly communicating within the same ESS.
  • the DS is a mechanism for connecting a plurality of APs.
  • the DS is not necessarily a network, and there is no limitation on the form if it can provide a predetermined distribution service.
  • the DS may be a wireless network such as a mesh network or a physical structure that connects APs to each other.
  • FIG. 3 is a diagram for describing a channel in a 60 GHz band for explaining a channel bonding operation according to an embodiment of the present invention.
  • channel 2 of the channels shown in FIG. 3 may be used in all regions and may be used as a default channel.
  • Channels 2 and 3 can be used in most of the designations except Australia, which can be used for channel bonding.
  • a channel used for channel bonding may vary, and the present invention is not limited to a specific channel.
  • FIG. 4 is a diagram illustrating a basic method of performing channel bonding in a WLAN system.
  • FIG. 4 illustrates the operation of 40 MHz channel bonding by combining two 20 MHz channels in an IEEE 802.11n system.
  • 40/80/160 MHz channel bonding will be possible.
  • the two exemplary channels of FIG. 4 include a primary channel and a secondary channel, so that the STA can examine the channel state in a CSMA / CA manner for the primary channel of the two channels. If the secondary channel is idle for a predetermined time (e.g. PIFS) at the time when the primary channel idles for a constant backoff interval and the backoff count becomes zero, the STA is assigned to the primary channel and Auxiliary channels can be combined to transmit data.
  • PIFS a predetermined time
  • channel bonding when channel bonding is performed based on contention as illustrated in FIG. 4, channel bonding may be performed only when the auxiliary channel is idle for a predetermined time at the time when the backoff count for the primary channel expires. Therefore, the use of channel bonding is very limited, and it is difficult to flexibly respond to the media situation.
  • an aspect of the present invention proposes a method in which an AP transmits scheduling information to STAs to perform access on a scheduling basis. Meanwhile, another aspect of the present invention proposes a method of performing channel access based on the above-described scheduling or on a contention-based basis independently of the above-described scheduling. In addition, another aspect of the present invention proposes a method for performing communication through a spatial sharing technique based on beamforming.
  • PHY MCS anmerkung Control PHY 0 Single carrier PHY (SC PHY) 1 ... 1225 ... 31 (low power SC PHY) OFDM PHY 13 ... 24
  • modulation modes can be used to meet different requirements (eg, high throughput or stability). Depending on your system, only some of these modes may be supported.
  • 5 is a diagram for explaining a physical configuration of an existing radio frame.
  • DMG Directional Multi-Gigabit
  • the preamble of the radio frame may include a Short Training Field (STF) and a Channel Estimation (CE).
  • the radio frame may include a header and a data field as payload and optionally a TRN field for beamforming.
  • 6 and 7 are views for explaining the configuration of the header field of the radio frame of FIG.
  • FIG. 6 illustrates a case where the SC mode is used.
  • the header includes information indicating the initial value of scrambling, Modulation and Coding Scheme (MCS), information indicating the length of data, information indicating whether an additional physical protocol data unit (PPDU) exists, packet type, training length, and aggregation. It may include information about whether to request a beam planeing request, a final received signal strength indicator (RSSI), a truncation state, a header check sequence (HCS), and the like.
  • the header has 4 bits of reserved bits, which may be used in the following description.
  • the OFDM header includes information indicating the initial value of scrambling, MCS, information indicating the length of data, information indicating the presence or absence of additional PPDUs, packet type, training length, aggregation, beam beaming request, last RSSI, truncation, Information such as a header check sequence (HCS) may be included.
  • HCS header check sequence
  • the header has 2 bits of reserved bits, and in the following description, such reserved bits may be utilized as in the case of FIG. 6.
  • the IEEE 802.11ay system is considering introducing channel bonding and MIMO technology for the first time in the existing 11ad system.
  • a new PPDU structure is needed. That is, the existing 11ad PPDU structure has limitations in supporting legacy terminals and implementing channel bonding and MIMO.
  • a new field for the 11ay terminal may be defined after the legacy preamble and the legacy header field for supporting the legacy terminal.
  • channel bonding and MIMO may be supported through the newly defined field.
  • FIG. 8 illustrates a PPDU structure applicable to the present invention.
  • the horizontal axis may correspond to the time domain and the vertical axis may correspond to the frequency domain.
  • a frequency band (eg, 400 MHz band) of a predetermined size may exist between frequency bands (eg, 1.83 GHz) used in each channel.
  • legacy preambles legacy STFs, legacy: CEs
  • a new STF and a legacy ST can be simultaneously transmitted through a 400 MHz band between each channel. Gap filling of the CE field may be considered.
  • the PPDU structure according to the present invention transmits ay STF, ay CE, ay header B, and payload in a broadband manner after legacy preamble, legacy header, and ay header A.
  • ay header, ay Payload field, etc. transmitted after the legacy header field may be transmitted through channels used for bonding.
  • the ay header may be referred to as an enhanced directional multi-gigabit (EDMG) header to distinguish the ay header from the legacy header, and the name may be used interchangeably.
  • EDMG enhanced directional multi-gigabit
  • the ay header and the ay payload may be transmitted through 2.16 GHz, 4.32 GHz, 6.48 GHz, and 8.64 GHz bandwidth.
  • the PPDU format when repeatedly transmitting the legacy preamble without performing the gap-filling as described above may also be considered.
  • ay STF, ay CE, and ay header B are replaced by a legacy preamble, legacy header, and ay header A without a GF-Filling and thus without the GF-STF and GF-CE fields shown by dotted lines in FIG. 8. It has a form of transmission.
  • an access point provides a predetermined number of channels to a plurality of stations (STA), respectively.
  • the present invention proposes a method of allocating a signal or data to be transmitted and received, and distinguishing signals transmitted to different STAs from some overlapping channels allocated to a plurality of STAs. This can improve system performance in the dense environment under consideration in IEEE 802.11ay systems.
  • a transmitting end of an access point simultaneously uses a plurality of antennas to transmit a plurality of STAs to different STAs through various bandwidths for each STA at the same time. It can transmit data or signals.
  • the above example assumes that the total number of available channels is four channels, and if the total number of available channels exceeds four channels, at least one to the maximum number of available total channels depending on the capability of the STA. By bonding as much as possible can transmit and receive data.
  • signals transmitted to each STA in the overlapped frequency resources or channels are distinguished from each other through precoding for each signal. Suggest to be.
  • FIG. 9 illustrates an operating frequency band or bandwidth used by a plurality of STAs when no guard tone is used according to an embodiment of the present invention
  • FIG. 10 illustrates another embodiment of the present invention.
  • the guard tone a diagram showing an operating frequency band or bandwidth used by a plurality of STAs.
  • each STA has an operating frequency band in units of channels. Accordingly, the first STA of FIGS. 9 and 10 may use one channel, and the second STA may bond two channels.
  • the channel unit may be differently applied according to a value adopted in the 11ay standard. For example, 1.83 GHz may be applied. Alternatively, 1760 MHz may be applied.
  • a transmitting end of an access point (AP) precodes subcarriers on a subcarrier basis for subcarriers used to simultaneously transmit different data to multiple STAs among fast subcarriers of the size of a fast fourier transform (FFT).
  • FFT fast fourier transform
  • one channel is allocated as a frequency resource to the first STA
  • two channels are allocated as frequency resources to the second STA
  • some frequency resources allocated to the second STA are assigned to the first STA. It overlaps with the frequency resource allocated to.
  • precoding for multi-stream transmission is applied to the first STA and the second STA to one channel superimposed on both STAs, and precoding that can transmit data only to the second STA to the other one of the two channels. This applies.
  • data signals transmitted to each STA may be precoded so that data signals transmitted to the first STA and data signals transmitted to the second STA may be distinguished from each other through precoding. do.
  • a data signal transmitted to the first STA and a data signal transmitted to the second STA in the overlapped operating channel may be orthogonal or pseudo-orthogonal through precoding applied to each signal.
  • various modifications in which both signals other than the above embodiments are divided by precoding may also be applied.
  • FIGS. 9 and 10 only two channels are bonded, but the number of channels used for bonding may be extended by four or the maximum number of channels provided by the system.
  • the first STA may receive data using one channel of 1.83 GHz bandwidth, and the second STA may have two channels. Data may be received using the bonded 3.99 GHz bandwidth.
  • a total bandwidth usable by the second STA may be greater than twice the size of the total bandwidth usable by the first STA.
  • the guard tone may be applied as shown in FIG. 10.
  • the guard tone is used as described above, interference generated from adjacent subcarriers may be removed or reduced.
  • a method of allocating the guard tone when the total number of STAs participating in the MU-MIMO is n can be expressed as follows.
  • the adjacent subcarrier of Min (BW_1, BW_2, ..., BW_n) is used as the guard tone. (Each BW is not the same.)
  • the first STA can receive data using the 1.83 GHZ bandwidth and the second STA.
  • the STA may receive data using a 3.66 GHz bandwidth that is twice the operating bandwidth of the first STA.
  • an AP may allocate a channel or bandwidth to be used for data transmission for each STA, and the AP may allocate a channel or bandwidth allocated for each STA using a specific field value of the PPDU format. Information may be signaled to each STA.
  • the AP may signal a channel or bandwidth used for each STA through the EDMG header A of the PPDU format when transmitting data to the STA.
  • the EDMG header A informs the channel or bandwidth used for data transmission for each STA so that each STA needs to receive only the corresponding channel or bandwidth.
  • each STA is pre-assigned group identification information (eg, Group ID) and an index within the corresponding Group ID. Therefore, if the group identification information is included in the EDMG header A in the signal sent from the transmitting end of the AP, each STA checks whether the group belongs to the group ID in the EDMG header A, and if the group is correct, matches the previously given index. You can check the number of streams and the channel or bandwidth according to the fields.
  • group identification information eg, Group ID
  • index within the corresponding Group ID. Therefore, if the group identification information is included in the EDMG header A in the signal sent from the transmitting end of the AP, each STA checks whether the group belongs to the group ID in the EDMG header A, and if the group is correct, matches the previously given index. You can check the number of streams and the channel or bandwidth according to the fields.
  • Such a signaling method is a method of dynamically adjusting / allocating a channel or bandwidth for each STA (hereinafter, referred to as a dynamic channel allocation method) and a method of statically allocating the same channel or bandwidth to all STAs (hereinafter, referred to as a static channel assignment method). Can be applied to all.
  • the transmitting end of the AP may signal whether one of the two channel allocation methods is selected / applied through the 1-bit indicator of the EDMG header A. (0: Static MU-MIMO, 1: dynamic MU-MIMO)
  • the signaling information for the channel or bandwidth used for each STA is the RTS (ready-to-send) / CTS (STA) of the STA and PCP / AP before the STA receives data other than the EDMG header
  • a clear-to-send) Reporting can also be made through send / receive.
  • the PCP / AP and STAs may inform the transceiver by modifying reserved bits (2 to 3 bits) of a header in the RTS / CTS PPDU format. have. Or, it may be informed using reserved bits of the RTS / CTS Mac Protocol Data Unit (MPDU).
  • MPDU reserved bits of the RTS / CTS Mac Protocol Data Unit
  • the reserved bits of the legacy field are modified (in the case of the 11ad SC PHY, the reserved bits of the legacy header field exist in total of 4 bits, and in the case of the 11ad OFDM PHY, there are 2 bits).
  • channel bonding assumes continuous aggregation between channels, but need not be limited thereto.
  • Tables 2 to 7 disclose methods of informing channel bonding information used for data transmission individually to STAs participating in data reception through EDMG header A or other field values of the above-described PPDU format. .
  • the number of STAs can be extended to other STAs.
  • an embodiment of the present invention provides a method of transmitting a frame using a plurality of channels by a channel aggregation method as a sub-concept of the above-described channel bonding or separate from the channel bonding.
  • the FFT size of the plurality of channels may be kept the same, and the information transmitted on each channel may be combined and used.
  • four channels can be used more flexibly, and each channel can be turned on or off in a bitmap manner through EDMG header A or other field values of the above-described PPDU format to support such channel bonding / channel combining. You can tell as shown in Table 4.
  • bit value of the EDMG header A when the bit value of the EDMG header A is 1100, it may indicate that channel 1 and channel 2 are used by channel bonding, and in case of 1010, it may indicate that channel 1 and channel 3 are used by channel combining.
  • Table 4 shows a case in which the maximum number of channels applied to the 11ay system is four, and the configuration may be extended to the number of bits corresponding to the maximum number of channels applied to the actual system.
  • each bit indicator may indicate whether a channel corresponding to each bit indicator is allocated to a specific STA in an on / off manner.
  • the channel of the 11ay system may consist of a primary channel and a secondary channel.
  • the primary channel is determined during the initial association process.
  • Auxiliary channel refers to the remaining channels other than the primary channel. Accordingly, the remaining channels other than the main channel among CH1, CH2, CH3, and CH4 defined in 11ad may be auxiliary channels.
  • signaling information indicating a channel or bandwidth used by each STA included in the EDMG header A field or the legacy field of the PPDU format may be represented as shown in Tables 5 to 7.
  • BW bandwidth or CH (channel) 2 0: primary channel 1: 2 channel bonding (primary channel + secondary channel 1) 2: 3: channel bonding (primary channel + secondary channel 1,2) 3: 4 channel bonding (primary channel + secondary channel 1,2,3)
  • BW bandwidth
  • CH channel 3 0: primary channel 1: 2 channel bonding (primary channel + secondary channel 1) 2: 2 channel bonding (primary channel + secondary channel 2) 3: 2 channel bonding (primary channel + secondary channel 3) 4: 3 channel bonding (primary channel + secondary channels 1,2) 5: 3 channel bonding (primary channel + secondary channels 1,3) 6: 3 channel bonding (primary channel + secondary channels 2,3) 7: 4 channel bonding (primary channel + secondary channels 1, 2,3)
  • the AP may provide channel information allocated to each STA to a plurality of STAs.
  • the following schemes may be applied to the channel allocation scheme for each STA.
  • the channel or bandwidth information allocated to each STA may be known through the EDMG header A of the PPDU format, but if the primary channel access method such as 802.11ac is applied, all STAs participating in the reception Since carrier sensing is performed through the primary channel, the allocated bandwidth can be known by receiving the preamble and the header transmitted from the transmitting end of the AP.
  • FIG. 11 illustrates a PPDU structure according to an embodiment of the present invention.
  • a first STA receives data through one channel, and a second STA uses two channel bonding. Receives data, but indicates a PPDU format when some operating channels overlap with an operating channel of the first STA.
  • the first STA and the second STA receive data by sharing a primary channel, and the number or bandwidth of channels available for receiving each data by various STAs may vary in various sizes. Scalable (up to the maximum number of channels).
  • FIG. 11 illustrates a PPDU format transmitted to a first STA and a second STA based on the PPDU format of FIG. 8, in another embodiment of the present invention, a structure different from the legacy STF field to the EDMG header A field in the PPDU format is illustrated in FIG. May be sent to.
  • the first STA receives data only through one channel (primary channel, CH1).
  • legacy STF, legacy CE, and legacy are used only through one channel (CH1).
  • CH1 primary channel
  • the PPDU format in which the header and the EDMG header A are transmitted may be applied.
  • all channel or bandwidth information signaled to each STA may be equally applied through the EDMG header A field or the other field of the PPDU format of the present invention.
  • the reserved bits (OFDM PHY: 2 bits and SC PHY: 4 bits) of the legacy headers are modified to consider that ay headers are not duplicated and transmitted, but may also transmit different data. .
  • the PPDU format when signaling for channel bonding is performed through the legacy header is shown in FIG. 11. 1 is a PPDU format when two-channel bonding is performed and can be expanded to three-channel and four-channel bonding.
  • the legacy preamble is received through each channel used for channel bonding, and AGC, synchronization, and channel estimation are separately performed. Therefore, different information can be sent to ay header A and ay header B.
  • Modulation of the ay header is possible for both SC PHY and OFDM PHY.
  • the chip rate can be transmitted and received in wide band by x2, x3, and x4 times proportional to the number of channels used for channel bonding.
  • the sampling rate and FFT size of the channel used for channel bonding It can transmit / receive wide band by x2, x3, x4 times in proportion to the number.
  • the AP may provide spatial stream number information by modifying some field values such as an EDMG header A or EDMG header B field of the PPDU.
  • some field values such as an EDMG header A or EDMG header B field of the PPDU.
  • a maximum of 2 bits may be applied to the number of bits for providing the information, thereby providing up to four spatial stream number information to the STA.
  • the present invention can also be applied to an uplink operation in which an STA transmits a signal to an AP.
  • the first STA is allocated two or more channels from the AP, When the first STA transmits a signal to the AP through the allocated channel, and there is a duplicated first channel among the channel allocated to the first STA and the channel allocated to the second STA,
  • the signal transmitted by the first STA and the signal transmitted by the second STA may be distinguished from each other through precoding applied to each signal.
  • FIG. 12 is a view for explaining an apparatus for implementing the method as described above.
  • the wireless device 800 of FIG. 12 may correspond to a specific STA of the above description, and the wireless device 850 may correspond to the PCP / AP of the above-described description.
  • the STA 800 may include a processor 810, a memory 820, and a transceiver 830, and the PCP / AP 850 may include a processor 860, a memory 870, and a transceiver 880. can do.
  • the transceiver 830 and 880 may transmit / receive a radio signal and may be executed in a physical layer such as IEEE 802.11 / 3GPP.
  • the processors 810 and 860 are executed at the physical layer and / or MAC layer, and are connected to the transceivers 830 and 880. Processors 810 and 860 may perform the aforementioned UL MU scheduling procedure.
  • Processors 810 and 860 and / or transceivers 830 and 880 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits and / or data processors.
  • the memories 820 and 870 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media and / or other storage units.
  • ROM read-only memory
  • RAM random access memory
  • flash memory memory cards
  • the method described above can be executed as a module (eg, process, function) that performs the functions described above.
  • the module may be stored in the memory 820, 870 and executed by the processors 810, 860.
  • the memories 820 and 870 may be disposed inside or outside the processes 810 and 860 and may be connected to the processes 810 and 860 by well-known means.
  • the present invention has been described assuming that it is applied to an IEEE 802.11-based WLAN system, but the present invention is not limited thereto.
  • the present invention can be applied in the same manner to various wireless systems capable of data transmission based on channel bonding.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé par lequel un point d'accès (AP) transmet un signal dans un système de réseau local sans fil (WLAN), et un dispositif associé. À cet effet, le point d'accès (AP) attribue un nombre M de canaux à une première station (STA) et un nombre N de canaux à une seconde STA, de manière à transmettre un signal, l'AP transmettant le signal à la première STA et/ou à la seconde STA par association de canaux ou agrégation de canaux lorsque deux canaux ou plus sont attribués à la première STA et/ou à la seconde STA, et lorsqu'il y a un premier canal superposé parmi le nombre M de canaux et le nombre N de canaux, un signal transmis à la première STA par le premier canal et un signal transmis à la seconde STA par le premier canal peuvent être distingués l'un de l'autre par un précodage appliqué aux signaux respectifs.
PCT/KR2016/008151 2015-07-31 2016-07-26 Procédé de transmission de signal basé sur une association de canaux, et dispositif associé Ceased WO2017023005A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN110235495A (zh) * 2017-02-17 2019-09-13 华为技术有限公司 802.11ay中EDMG能力和EDMG操作元素的信道宽度指示
KR20190113920A (ko) * 2017-02-17 2019-10-08 후아웨이 테크놀러지 컴퍼니 리미티드 802.11ay의 edmg 용량 및 edmg 작동 요소의 채널 폭 지시
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US10609688B2 (en) 2017-02-17 2020-03-31 Huawei Technologies Co., Ltd. Channel bandwidth indication in EDMG capabilities element and EDMG operations element in 802.11ay
KR102305406B1 (ko) * 2017-02-17 2021-09-24 후아웨이 테크놀러지 컴퍼니 리미티드 802.11ay의 edmg 용량 및 edmg 작동 요소의 채널 폭 지시
CN110235495B (zh) * 2017-02-17 2021-12-03 华为技术有限公司 802.11ay中EDMG能力和EDMG操作元素的信道宽度指示
EP3989474A1 (fr) * 2017-02-17 2022-04-27 Huawei Technologies Co., Ltd. Indication de largeur de canal dans des capacités edmg et des éléments d'opérations edmg dans 802.11ay
US12101211B2 (en) 2020-06-02 2024-09-24 Lg Electronics Inc. Method and device for classifying sensing frames in wireless LAN system

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