WO2017014551A1 - Procédé de transmission d'un signal basée sur une agrégation de canaux et un dispositif associé - Google Patents

Procédé de transmission d'un signal basée sur une agrégation de canaux et un dispositif associé Download PDF

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WO2017014551A1
WO2017014551A1 PCT/KR2016/007894 KR2016007894W WO2017014551A1 WO 2017014551 A1 WO2017014551 A1 WO 2017014551A1 KR 2016007894 W KR2016007894 W KR 2016007894W WO 2017014551 A1 WO2017014551 A1 WO 2017014551A1
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channel
sta
bonding
header
channels
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English (en)
Korean (ko)
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박성진
김진민
조한규
박은성
조경태
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엘지전자 주식회사
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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the 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 a 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
  • the first STA transmits a signal through channel bonding in a WLAN system
  • the first STA is connected to a second STA.
  • the radio frame is transmitted by channel bonding two or more channels, and when the radio frame is transmitted by using channel bonding of four channels, a first channel, a second channel, and Transmitting a first preamble through a first bonding frequency region including an interval frequency region corresponding to an interval between the first channel and the second channel, wherein a third channel, a fourth channel, and the We propose a signal transmission method for repeatedly transmitting the first preamble through a second bonding frequency region including an interval frequency region corresponding to an interval between a third channel and the fourth channel. .
  • the first preamble may include a Short Training Field (STF) and a Channel Estimation (CE) field, and the STF sequence and the CE for two-channel bonding even when the radio frame is transmitted using four channel bonding. You can use sequences.
  • STF Short Training Field
  • CE Channel Estimation
  • the first STA may sequentially transmit preamble information for the first type STA, a header for the first type STA, and a header for the second type STA through the first channel and the second channel, respectively.
  • the first preamble may be transmitted as a preamble for a second type STA through the first bonding frequency domain.
  • the header for the first type STA includes duplicated information whether the header for the second type STA transmitted through the first channel and the header for the second type STA transmitted through the second channel include independent information. It may include information about whether to include.
  • one of the header for the first type STA and the header for the second type STA may include bonding indication information indicating which of the first to fourth channels is to be used for channel bonding.
  • the second STA may attempt to receive only a channel corresponding to a primary channel of the first to fourth channels until the bonding indication information is received.
  • the first STA transmits an RTS frame to the second STA and receives a CTS frame from the second STA before transmitting the radio frame using channel bonding, wherein the RTS frame and the CTS Any one or more of the frames may include bonding indication information indicating which of the first to fourth channels will be used for channel bonding.
  • the first preamble may include an Enhanced Directional Multi-Gigabit (EDMG) header A and an EDMG header B, and the radio frame includes the MU- If the MIMO and the OFDMA are not supported, the first preamble may not include the EDMG header B.
  • EDMG Enhanced Directional Multi-Gigabit
  • the first STA may perform a performance negotiation process through a beacon frame or a frame exchange for association before transmitting the radio frame to the second STA.
  • One or more of information on whether channel bonding capability, power consumption capability, and RTC and CTS frame exchange are mandatory for the channel bonding operation of the 2 STA may be checked.
  • the first STA may simultaneously transmit a radio frame to the second STA and a third STA having different channel bonding capabilities from the second STA according to at least one of OFDMA and MU-MIMO schemes.
  • Channel unit resource region (RU) allocation information allocated to the second STA and the third STA may be informed.
  • the channel unit resource region allocated to the second STA and the channel unit resource region allocated to the third STA may include an overlapping channel unit resource region, and the radio frame transmitted to the second STA and the third STA The radio frame transmitted to may be distinguished through a precoding scheme.
  • the channel unit resource region allocated to the second STA and the channel unit resource region allocated to the third STA may be allocated to different channel unit resource regions in the frequency domain.
  • the first STA may transmit an RTS frame to the second STA before receiving the radio frame to the second STA, receive a CTS frame from the second STA, and use the RTS frame and the CTS frame exchange.
  • the radio frame may include only a preamble for the first station, a header for the first station, and a payload field.
  • the header for the first type STA may be a header for legacy STA prior to IEEE 802.11ay
  • the header for the second type STA may be a header for STA that supports IEEE 802.11ay.
  • a first station (STA) apparatus for transmitting a signal through channel bonding in a WLAN system, the apparatus comprising: a transceiver configured to transmit a radio frame to a second STA; And a processor configured to generate and transmit the radio frame to the transceiver, wherein the processor is configured to transmit the radio frame by channel bonding two or more channels, and transmits the radio frame using channel bonding of four channels.
  • the first preamble and the data through the first bonding frequency region including a first frequency, a second channel and an interval frequency region corresponding to the interval between the first channel and the second channel among the four channels.
  • transmit the first preamble through a second bonding frequency region including a third channel, a fourth channel of the four channels, and an interval frequency region corresponding to an interval between the third channel and the fourth channel.
  • a station apparatus configured to repeatedly transmit the data.
  • the present invention can flexibly respond to the situation of the medium for the IEEE 802.11ay standardization as described above.
  • 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 is a diagram illustrating a PPDU structure using gap filling according to a preferred embodiment of the present invention.
  • FIG. 9 is a diagram illustrating a PPDU structure without using gap filling according to another embodiment of the present invention.
  • 10 and 11 illustrate an example of an 11ay PPDU structure when four channels are bonded and used according to one embodiment of the present invention.
  • 12 to 14 are diagrams for explaining various configurations of an EDMG header when configuring a PPDU in a gap-filling method according to an embodiment of the present invention.
  • 15 and 16 illustrate various configurations of an EDMG header when a PPDU is configured in a manner not using gap filling according to an embodiment of the present invention.
  • 17 and 18 are diagrams for describing a method of extending various EDMG header structures as described above with 3-4 channels.
  • FIG. 19 illustrates a PPDU structure using gap-filling in accordance with an embodiment of the present invention.
  • 20 is a diagram for describing a method of allocating resources to a plurality of STAs by using resource elements in units of channels according to an embodiment of the present invention.
  • FIG. 21 is a diagram illustrating an example in which three STAs having different channel bonding performances are allocated with a unit of resource unit according to the method described with reference to FIG.
  • 22 and 23 illustrate a method for simultaneously supporting a legacy device and an 11ay device according to an embodiment of the present invention.
  • 24 is a diagram for describing a method of performing multi-channel operation when STAs do not have the same FFT size according to an embodiment of the present invention.
  • 25 illustrates a PPDU structure with the EDMG header omitted in accordance with one embodiment of the present invention.
  • FIG. 26 illustrates a PPDU structure in which EDMG STF and EDMG CE are omitted in accordance with one embodiment of the present invention.
  • FIG. 27 is a diagram for describing 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), or a site controller.
  • BS base station
  • BTS base transceiver system
  • 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.
  • 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 a 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.
  • a header indicates information indicating an initial value of scrambling, an MCS, information indicating a length of data, information indicating whether an additional PPDU is present, and a packet type. It may include information such as training length, aggregation, beam beaming request, last RSSI, truncation, and header check sequence (HCS). Also, as shown in FIG. 6, the header has 4 bits of reserved bits, and the following bits 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 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 a 11ay terminal may be defined behind a legacy preamble and a legacy header field to support the legacy terminal.
  • channel bonding and MIMO may be supported through the newly defined field.
  • FIG. 8 illustrates a PPDU structure according to one preferred embodiment of the present invention.
  • the horizontal axis may correspond to the time domain and the vertical axis may correspond to the frequency domain.
  • a 400 MHz band may exist between frequency bands (1760 MHz) used in each channel.
  • legacy preambles legacy STFs, legacy CEs
  • a new STF and CE are simultaneously transmitted together with the legacy preambles through a 400 MHz band between each channel.
  • the AGC, synchronization, and channel estimation for the entire frequency band used for bonding together with the legacy preamble can be performed at once. Therefore, new STF and CE fields for bonded payload transmission in 11ay do not need to exist after the legacy preamble section.
  • FIG. 8 illustrates a case where two channels are bonded to each other, but the present invention may be equally applied to bonding three or more channels.
  • reserved bits (OFDM PHY: 2 bits, SC PHY: 4 bits) of the legacy header field may be modified to inform bandwidth used for channel bonding. Therefore, the ay header and ay Payload transmitted after the legacy header field may be transmitted through channels (2.16 + 2.16 GHz in FIG. 8) used for bonding.
  • ay header and ay payload can be transmitted through 2.16 GHz, 4.32 GHz, 6.48 GHz, and 8.64 GHz bandwidth according to the bandwidth indicated by the legacy header field. have.
  • the reserved bits of the legacy header field are 4 bits in total, and in the case of the 11ad OFDM PHY, 2 bits are present. Therefore, a method of informing bandwidth and channelization used for channel bonding by modifying reserved bits as shown in the following tables is proposed. This description assumes that channel bonding is a contiguous coupling between channels, but need not be limited thereto.
  • each terminal knows the primary channels and the channel bonding procedure is determined, like 11n / ac channel bonding method (primary / secondary channel bonding), channel bonding can be performed even if the bandwidth is only 2 bits in the legacy header as shown in Table 2. Can be.
  • the modulation method of the ay header transmitted in wide band is possible for both SC and OFDM.
  • Legacy headers can carry 64 bits of information. If the number of bonded channels is increased to 2, 3, or 4 in the same manner, the ay header may carry 128 bits, 192 bits, and 256 bits of information in proportion to the bandwidth of the bonded channels. Alternatively, the information may be fixed to 128 bits in the ay header and the remaining bits may be used for padding with data or for increasing repetition.
  • the PPDU format may also be considered when repetitively transmitting legacy preambles without performing the gap-filling as described above.
  • FIG. 9 illustrates a PPDU structure according to another embodiment of the present invention.
  • the horizontal axis may correspond to the time domain and the vertical axis may correspond to the frequency domain.
  • the PPDU of FIG. 9 has a form of transmitting ay STF and ay CE over the legacy preamble, the legacy header, and the ay header over a wide band without performing gap-filling.
  • 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 through the legacy header is shown in FIG. 9. 9 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 the ay header (a) and the ay header (b).
  • Modulation of the ay header is possible for both SC PHY and OFDM PHY.
  • SC PHY x2, x3, x4 times the chip rate based on the number of channels used for channel bonding, and can transmit and receive in wide band.
  • OFDM PHY sampling rate and FFT size It can transmit / receive wide band by x2, x3, x4 times in proportion to the number.
  • Signaling indicating whether to send the ay header as a duplicate or different information can be reported in 1bits through the legacy header as shown in Table 4.
  • the ay header can be transmitted through one channel, two channels, three channels, and four channels according to the bandwidth or channelization indicated by the legacy header field.
  • the reserved bits of the legacy header field are 4 bits in total, and in the case of the 11ad OFDM PHY, 2 bits are present. Therefore, the reserved bits can be modified as shown in Table 2 and Table 3 to inform the bandwidth and channelization used for channel bonding.
  • channel bonding is performed even if the bandwidth is only 2 bits in the legacy header as shown in Table 2 above. can do.
  • a new channelization represented by 3 bits is preferable as shown in Table 3 above.
  • the present embodiment proposes a PPDU format for effectively bonding four channels while reducing complexity.
  • 10 and 11 illustrate an example of an 11ay PPDU structure when four channels are bonded and used according to one embodiment of the present invention.
  • FIG. 10 illustrates a case where gap-filling is not performed between channels in an 11ay PPDU preamble section
  • FIG. 11 illustrates a case where gap-filling is performed between channels in an 11ay PPDU preamble section.
  • two PPDUs each have a duplicate (copy) structure.
  • EDMG CE and a second bonding frequency for transmitting data (Payload) and including an interval frequency region corresponding to a third channel, a fourth channel, and an interval between the third channel and the fourth channel among the four channels. It is proposed to repeatedly transmit the same first preamble (EDMG STF and EDMG CE) and data Payload through the region.
  • the EDMG Header and Payload part can reuse the structure of 2-channel bonding.
  • the following describes whether the 11ay header transmitted through channel bonding independently configured for each channel, or whether to transmit the duplicated information.
  • 12 to 14 are diagrams for explaining various configurations of an EDMG header when configuring a PPDU in a gap-filling method according to an embodiment of the present invention.
  • FIG. 12 shows a PPDU structure for transmitting an EDMG header in wide band using both channels.
  • FIG. 13 shows a PPDU for transmitting EDMG header (a) and EDMG header (b) with independent information. The structure is shown.
  • FIG. 14 shows a PPDU structure in which an EDMG header of one channel is duplicated and transmitted to the other channel.
  • the reserved bits (OFDM PHY: 2 bits, SC PHY: 4 bits) of the legacy header field may be modified to inform bandwidth and channels used for channel bonding.
  • An indicator of an EDMG header may be added to inform bandwidth and channels used for channel bonding. Therefore, the EDMG header transmitted after the legacy header field can be transmitted in various structures as shown in FIGS. 12 to 14, and the EDMG payload is a wide band through bonding of channels (2.16 + 2.16 GHz) used for channel bonding. Can be sent to rescue.
  • 15 and 16 illustrate various configurations of an EDMG header when a PPDU is configured in a manner not using gap filling according to an embodiment of the present invention.
  • FIG. 15 illustrates a PPDU structure in which EDMG headers are not duplicated and transmitted but may transmit different data.
  • 16 shows a PPDU structure in which EDMG headers are duplicated and transmitted.
  • the reserved bits (OFDM PHY: 2 bits, SC PHY: 4 bits) of the legacy header field may be modified to inform bandwidth and channels used for channel bonding.
  • An indicator of an EDMG header may be added to inform bandwidth and channels used for channel bonding. Therefore, the EDMG header transmitted after the legacy header field can be transmitted in various structures and contents, and the EDMG payload can be transmitted in a wide band structure through bonding of channels (2.16 + 2.16 GHz) used for channel bonding.
  • 17 and 18 are diagrams for describing a method of extending various EDMG header structures as described above with 3-4 channels.
  • the present embodiment proposes a PPDU format for effectively bonding four channels while reducing complexity.
  • FIG. 17 illustrates a case where gap-filling is not performed between channels in an 11ay PPDU preamble section
  • FIG. 18 illustrates a case where gap-filling is performed between channels in an 11ay PPDU preamble section.
  • both channels use four channels for bonding, there are two two-channel bonding PPDUs (CH1 + CH2, CH3 + CH4), and the two PPDUs each have a duplicate (copy) structure.
  • the EDMG Header and Payload part can reuse the structure of 2-channel bonding.
  • FIG. 19 illustrates a PPDU structure using gap-filling in accordance with an embodiment of the present invention.
  • 11ay uses primary channel like 11ac, devices usually perform CCA for all channels, decode signal coming through primary channel, and transmit from L-Header or EDMG Header that informs BW.
  • the secondary channel is not decoded until the channels used in the database are known.
  • the PPDU structure can be extended to four channels, and the L-Header or the EDMG Header may not be a duplicate mode.
  • the chip rate (1760MHz) of the 11ad channel band is used for the transmission of the existing L-STF, L-CE, and when the channel bonding, the empty frequency band (400MHz) between the channels GF-STF It is used for the transmission of GF-CE. Therefore, since the AGC and channel estimation for channel bonding are performed simultaneously in the legacy preamble section, the EDMG STF and EDMG CE, which are transmitted in wide band, are not required before the payload is transmitted.
  • the 11ay receiving terminal decodes only the signal coming through the primary channel like 11ac, the signal coming into the secondary channel is not decoded until the field indicating the channel bonding is decoded. Therefore, when the 11ac method is applied, there is a problem that an accurate channel for channel bonding is not achieved.
  • one embodiment of the present invention proposes the following four methods.
  • Method 1 The 11ay terminal normally performs decoding on signals from all channels.
  • Method 2 In case of using 11ac method, there is always a method to be preceded by RTS / DMG CTS before transmitting the PPDU with gap-filling.
  • Method 4 Use Method 2 and Method 3 dynamically together.
  • Method 1 can be a huge burden on the processing side of the receiver.
  • Method 2 since the RTS / DMG CTS must always be preceded before sending data, the shorter the PPDU length is, the larger the overhead becomes.
  • Method 3 has the advantage that it can be used without RTS / DMG CTS.
  • the method 2 can be used in combination with the method 2 and 3 depending on the situation considering the environment.
  • a PPDU format in which a gap-filling method is not used is basically used to solve the above-mentioned problem, and unless otherwise mentioned, gap-filling is not used. It is assumed that it is explained. Meanwhile, as mentioned in Method 4, it is assumed that channel bonding indication information to be used for channel bonding is transmitted to STAs using RTC / CTS even if Gap-Filling is not used.
  • the BW required for channel bonding may be informed using reserved bits of the L-header, or may be notified through PSDU or MPDU. In addition, it can inform whether the channel bonding or DYNAMIC channel bonding in the above manner.
  • reserved bits (2 ⁇ 3bits) of Header of 11ad Control PHY can be used to inform bandwidth.
  • Table 5 shows an example of informing bandwidth information using reserved bits 2 bits of the header of the 11ad Control PHY.
  • Table 7 below can inform the channel information using the reserved bits 3 bits of the header of the 11P Control PHY when using the primary channel concept such as 11ac.
  • 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 in order to support such channel bonding / channel combining, the reserved bits 4 bits of the header of the 11ad Control PHY are mapped to each channel to turn on each channel in a bitmap manner. You can tell on / off like this:
  • the reserved bits 4 bit value of the header of the 11ad Control PHY is 1100, it may indicate that channel 1 and channel 2 are used for channel bonding, and in case of 1010, channel 1 and channel 3 are used for channel combining. Can be represented.
  • the signaling shown in Tables 5 to 8 above is represented by using reserved bits of the header of the Control PHY of 11ad.
  • the present invention is not limited thereto, and the EDMG header A or the like will be described later. It can be indicated in the same manner to any one of the EDMG header B.
  • a bandwidth used for channel bonding (channel combining) through a legacy header field.
  • ay header that can include more information bits can be configured since transmission is possible in a wide band of bonding / combined form from newly added ay-header.
  • the PPDU format when transmitting legacy preambles as duplicates without using gap-filling is considered.
  • channel bonding / combination if reserved bits of legacy header (OFDM PHY: 2 bits, SC PHY: 4 bits) are modified, ay headers are not duplicated and transmitted, but different data can be sent.
  • the PPDU format when signaling for channel bonding / combination through a legacy header is shown in FIG. 15. This structure is simply expandable to 3 channels / 4 channels as described above.
  • the frequency band used for channel bonding / combining in Rx must be sensed. Since legacy preamble is received through each channel used for channel bonding / combining, and AGC, synchronization, and channel estimation are performed separately, different information can be sent to ay Header (a) and ay Header (b).
  • the modulation of the ay header is possible for both the SC PHY and the OFDM PHY.
  • the chip rate is x2, x3, and x4 in proportion to the number of channels used for channel bonding, and both the method of transmitting and receiving in wide band and the x1 times of the legacy header are possible.
  • OFDM PHY there is a method of transmitting and receiving in wide band by multiplying sampling rate and FFT size by x2, x3, and x4 in proportion to the number of channels used for channel bonding. To this end, it is preferable to insert and transmit a null value in a subcarrier matching the 400 MHz band between each channel.
  • up to ay Header can be all the same way of x1 as legacy Header.
  • the modulation method of the ay header transmitted in wide band is possible for both SC and OFDM.
  • 64 bits of information can be loaded.
  • the ay header can carry 128 bits, 192 bits, and 256 bits of information in proportion to the bandwidth of the bonded channels.
  • the information may be fixed to 128 bits in the ay header, and the remaining bits may be padded with data or increased repetition.
  • the 802.11ay PPDU format can support MIMO in a PPDU format in which only one ay-header field exists.
  • the receiver decodes the incoming signal through all channels, or when the receiver knows the channels needed for bonding, preceded by the RTS / DMG CTS, the legacy header indicates that channel bonding is performed. Different channels may have different information. Then, for example, different MCS indicators can be included in the EDMG header for each channel so that different MCS can be used for each channel according to the channel state.
  • the IEEE 802.11ay system considers the introduction of channel bonding and MIMO technology.
  • various technologies are being considered to enable communication in various environments such as indoors, outdoor, and dense environments.
  • MU-MIMO is effective in dense environment.
  • dense environment when channel bonding ability is different for each STA or channel bandwidth for data reception is different, flexible communication is possible by assigning different channels or bandwidths for data transmission and reception for each STA in downlink MU-MIMO situation. The improvement in performance can be achieved.
  • STAs are allocated a BW for transmitting a frame by using a resource unit of a channel unit for a total of four channels.
  • STAs using the same frequency band receive desired data through MIMO.
  • 20 is a diagram for describing a method of allocating resources to a plurality of STAs by using resource elements in units of channels according to an embodiment of the present invention.
  • FIG. 20 illustrates an example in which OFDMA, channel bonding, and MU-MIMO are simultaneously considered in 11ay.
  • STA a, STA b, and STA c may be simultaneously allocated different frequency resources by the OFDMA scheme, and STA d may receive and receive the overlapping frequency resources by the MU-MIMO scheme. That is, STA d may be allocated by using the same channel by using precoding that may be distinguished from STA a / b / c.
  • FIG. 21 is a diagram illustrating an example in which three STAs having different channel bonding performances are allocated with a unit of resource unit according to the method described with reference to FIG.
  • FIG. 21 illustrates a PPDU format when allocating BWs corresponding to three channels to three STAs by applying OFDMA MU-MIMO.
  • OFDMA orthogonal frequency division multiple access
  • Channel assignment via EDMA header A is as shown in the above tables.
  • the EDMG Header A may inform the MCS differently for each STA. Alternatively, this may be indicated through EDMG Header B.
  • the MCS may be informed differently for each STA through the EDMG Header B.
  • 11ay considers bonding up to four channels or using them simultaneously. Accordingly, a device that does not support channel bonding or an 11ay device that does or does not channel bond depending on the situation may exist in the system.
  • the following embodiment proposes a PPDU for simultaneously supporting 11ad legacy devices and 11ay devices in such a situation.
  • 22 and 23 illustrate a method for simultaneously supporting a legacy device and an 11ay device according to an embodiment of the present invention.
  • FIG. 22 and FIG. 23 show PPDUs supporting 11ad legacy devices and 11ay devices simultaneously when using three channels. Up to four channels can be expanded simultaneously, and the primary channel can be one of them. Also, EDMG Header B for 11ay can be omitted unless it supports MU-MIMO.
  • the 11ad legacy terminal can receive the incoming signal through the channel used by itself as the existing 11ad.
  • the capability negotiation for the power consumption capability can be informed at the same time.
  • a device with a high power consumption can decode all signals coming in through channels corresponding to its channel bonding capability in a non-sleep mode. This performance can be determined when sending and receiving initial beacon frames or frames for associations.
  • STAs can individually request the PCP / AP to use RTS / DMG CTS.
  • the requested PCP / AP may accept the request and mandatory use of the STA and RTS / DMG CTS, or may reject and use the RTS / DMG CTS as an option. It is possible to support flexible multi-channel operation when multiple channels are used simultaneously through channel bonding or information on how much channel to use or power consumption in RTS / DMG CTS.
  • 24 is a diagram for describing a method of performing multi-channel operation when STAs do not have the same FFT size according to an embodiment of the present invention.
  • One embodiment of the present invention proposes to add an indicator indicating a multi-channel operation or OFDMA in the L-Header by modifying reserved bits.
  • EDMG Header A it is proposed to inform the channel and bandwidth allocated for each STA by the same method as the MU-MIMO and OFDMA signaling proposed above.
  • MU-MIMO and OFDMA signaling proposed above.
  • CH2 and CH3 may be used as guard to remove interference.
  • the number of channels can be extended up to four, and the number of STAs can be up to four.
  • the RU allocated per STA may vary.
  • EDMG Header B can be omitted if necessary.
  • 25 illustrates a PPDU structure with the EDMG header omitted in accordance with one embodiment of the present invention.
  • the PPDU structure for the 11ay terminal may omit and transmit the EDMG Header A as shown in FIG. 25, and may instead perform signaling for the 11ay terminal using reserved bits of the L-Header. .
  • the channel and the BW allocated to the 11ay terminal may be informed using the reserved bits.
  • 11ay and 11ad may be different from each other in MCS by using reserved bits.
  • FIG. 26 illustrates a PPDU structure in which EDMG STF and EDMG CE are omitted in accordance with one embodiment of the present invention.
  • the PPDU structure can be designed without EDMG STF or EDMG CE as shown in FIG.
  • the 11ay UE can always decode the signal in the band corresponding to the BW corresponding to its channel bonding capability at all times, this also can design the PPDU structure without EDMG STF or EDMG CE.
  • the BW information allocated to the 11ay terminal through the L-Header in the RTS / DMG CTS and additional information on the PPDU structure can be informed as necessary. have.
  • the structure is used as shown in FIG. 26 above.
  • Table 9 and Table 10 below show how to use reserved bits (3 bits) of the L-Header.
  • the PPDU structure of the channel used by 11ay may be added with EDMG STF, EDMG CE, EDMG Header A, EDMG Header B, etc. in front of the payload. If necessary, only EDMG Header A may be added to signal only for 11ay terminal, and others may be added or not depending on the situation. If 1, the PPDU structure of the channel used by 11ay is the same as that of the 11ad PPDU structure. In this case, the 11ay terminal may reuse the information of the L-Header.
  • Legacy 11ad does not support channel bonding, data is transmitted and received only through one channel agreed in advance. Therefore, primary channel should always be assigned to legacy 11ad. (This is true when legacy and 11ay coexist.)
  • Table 11 shows an example of the BW field design of the EDMG header A of the RTC / CTS frame.
  • FIG. 27 is a diagram for describing an apparatus for implementing the method as described above.
  • the wireless device 800 of FIG. 27 may correspond to a specific STA of the above description, and the wireless device 850 may correspond to the PCP / AP of the above 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.

Abstract

La présente invention concerne un procédé par lequel une station (STA) transmet un signal par une agrégation de canaux dans un système LAN sans fil (WLAN), et un dispositif associé. À cet effet, une première station (STA) transmet une trame sans fil à une seconde STA, la trame sans fil étant transmise par agrégation de canaux de deux canaux ou plus. Si la trame sans fil est transmise en utilisant une agrégation de canaux de quatre canaux, la première STA transmet un premier préambule à travers un premier domaine de fréquence d'agrégation comprenant, parmi les quatre canaux, un premier canal, un deuxième canal, et un domaine de fréquence d'intervalle correspondant à un intervalle entre le premier canal et le deuxième canal, et peut transmettre de façon répétitive le premier préambule à travers un second domaine de fréquence d'agrégation comprenant parmi, les quatre canaux, un troisième canal, un quatrième canal et un domaine de fréquence d'intervalle correspondant à un intervalle entre le troisième canal et le quatrième canal.
PCT/KR2016/007894 2015-07-20 2016-07-20 Procédé de transmission d'un signal basée sur une agrégation de canaux et un dispositif associé WO2017014551A1 (fr)

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US201562199253P 2015-07-31 2015-07-31
US201562199254P 2015-07-31 2015-07-31
US62/199,253 2015-07-31
US62/199,254 2015-07-31
US201562201087P 2015-08-04 2015-08-04
US201562201084P 2015-08-04 2015-08-04
US62/201,087 2015-08-04
US62/201,084 2015-08-04
US201562202924P 2015-08-10 2015-08-10
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CN110999508A (zh) * 2017-07-06 2020-04-10 Lg电子株式会社 在无线lan系统中基于多个信道化的信道来发送帧的方法以及使用该方法的无线终端
CN110999508B (zh) * 2017-07-06 2023-09-08 Lg电子株式会社 在无线lan系统中基于多个信道化的信道来发送帧的方法以及使用该方法的无线终端
WO2019216571A1 (fr) * 2018-05-08 2019-11-14 엘지전자 주식회사 Procédé de transmission de trame basé sur une pluralité de canaux dans un système lan sans fil et terminal sans fil utilisant ledit procédé

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