WO2020091332A1 - Communication utilisant une liaison multiple dans un système lan sans fil - Google Patents

Communication utilisant une liaison multiple dans un système lan sans fil Download PDF

Info

Publication number
WO2020091332A1
WO2020091332A1 PCT/KR2019/014254 KR2019014254W WO2020091332A1 WO 2020091332 A1 WO2020091332 A1 WO 2020091332A1 KR 2019014254 W KR2019014254 W KR 2019014254W WO 2020091332 A1 WO2020091332 A1 WO 2020091332A1
Authority
WO
WIPO (PCT)
Prior art keywords
link
sta
frame
stas
information
Prior art date
Application number
PCT/KR2019/014254
Other languages
English (en)
Korean (ko)
Inventor
송태원
류기선
김정기
최진수
김서욱
장인선
Original Assignee
엘지전자 주식회사
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
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2020091332A1 publication Critical patent/WO2020091332A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • 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

  • This specification relates to transmission and reception of information related to frame loss in a wireless local area network (LAN).
  • LAN wireless local area network
  • Wireless local area network has been improved in various ways.
  • the IEEE 802.11ax standard proposed an improved communication environment using orthogonal frequency division multiple access (OFDMA) and downlink multi-user multiple input (MIMO) techniques.
  • OFDMA orthogonal frequency division multiple access
  • MIMO downlink multi-user multiple input
  • the new communication standard may be an recently discussed extreme high throughput (EHT) standard.
  • EHT extreme high throughput
  • the EHT standard can use newly proposed increased bandwidth, improved PHY layer protocol data unit (PPDU) structure, improved sequence, and hybrid automatic repeat request (HARQ) technique.
  • PPDU PHY layer protocol data unit
  • HARQ hybrid automatic repeat request
  • the EHT standard may be referred to as the IEEE 802.11be standard.
  • the new communication standard may be an recently discussed high-throughput (EHT) standard.
  • EHT high-throughput
  • the EHT standard can use newly proposed increased bandwidth, improved PHY protocol data unit (PPDU) structure, improved sequence, hybrid automatic repeat request (HARQ) technique, multi-link, and the like.
  • PPDU PHY protocol data unit
  • HARQ hybrid automatic repeat request
  • an STA eg, an AP or a non-AP STA supporting a multilink (or multiband) frame loss ( frame loss) related to the technical characteristics of transmitting / receiving information.
  • the first STA may acquire information related to multi-links including the first link and the second link used in the second STA.
  • the first STA may receive a first frame from the second STA through the first link.
  • the first STA may determine a frame loss related to the second link, and transmit report information related to the frame loss to the second STA through the first link.
  • the report information may include identification information related to the second link.
  • a receiving STA (station) receiving a frame through a multi-link may determine that a frame loss has occurred. When a frame loss occurs, the receiving STA may report information about the frame loss to the transmitting STA. The transmitting STA can prevent radio resources from being wasted by stopping frame transmission on a link where frame loss occurs. According to an example of the present specification, a method of reporting frame loss in a multilink transmission situation may enable efficient signal transmission.
  • FIG. 1 shows an example of a transmitting device and / or a receiving device of the present specification.
  • WLAN wireless LAN
  • 3 is a diagram for explaining a general link setup process.
  • FIG. 5 is a diagram showing the arrangement of a resource unit (RU) used on a 20MHz band.
  • RU resource unit
  • FIG. 6 is a view showing the arrangement of a resource unit (RU) used on the 40MHz band.
  • RU resource unit
  • FIG. 7 is a view showing the arrangement of a resource unit (RU) used on the 80MHz band.
  • RU resource unit
  • FIG. 13 shows an example of a sub-field included in a per user information field.
  • 22 is a diagram illustrating an example of a procedure in which the STAs 110 and 120 determine a frame loss occurrence based on a previous transmission.
  • 23 is a diagram illustrating an example of a procedure in which the STAs 110 and 120 determine frame loss based on transmission link information.
  • 24 and 25 are diagrams illustrating an embodiment of a method for transmitting report information related to frame loss.
  • 26 is a flowchart illustrating an embodiment of a method for reporting frame loss information.
  • FIG. 27 is a flowchart illustrating an embodiment of a frame transmission method.
  • 29 is a flowchart for explaining an embodiment of the operation of the second STA according to FIG. 26.
  • the following example of the present specification can be applied to various wireless communication systems.
  • the following example of the present specification may be applied to a wireless local area network (WLAN) system.
  • WLAN wireless local area network
  • this specification may be applied to the IEEE 802.11a / g / n / ac standard, or the IEEE 802.11ax standard.
  • the present specification can be applied to the newly proposed EHT standard or IEEE 802.11be standard.
  • an example of the present specification may be applied to a new wireless LAN standard that improves the EHT standard or IEEE 802.11be.
  • FIG. 1 shows an example of a transmitting device and / or a receiving device of the present specification.
  • STA includes two stations (STA).
  • STA (110, 120) is a mobile terminal (mobile terminal), a wireless device (wireless device), a wireless transmit / receive unit (WTRU), user equipment (User Equipment; UE), mobile station (Mobile Station; MS) , It can also be called various names such as a mobile subscriber unit or simply a user.
  • the STAs 110 and 120 may be called various names such as a receiving device, a transmitting device, a receiving STA, a transmitting STA, a receiving device, and a transmitting device.
  • the STAs 110 and 120 of the present specification may support various communication standards other than the IEEE 802.11 standard. For example, it may support a communication standard (eg, LTE, LTE-A, 5G NR standard) according to the 3GPP standard. Also, the STA of the present specification may be implemented with various devices such as a mobile phone, a vehicle, and a personal computer.
  • a communication standard eg, LTE, LTE-A, 5G NR standard
  • 3GPP 3rd Generation
  • the STA of the present specification may be implemented with various devices such as a mobile phone, a vehicle, and a personal computer.
  • the first STA 110 may include a processor 111, a memory 112, and a transceiver 113.
  • the illustrated processor, memory, and transceiver may each be implemented as separate chips, or at least two or more blocks / functions may be implemented through one chip.
  • the transceiver 113 of the first STA performs a signal transmission / reception operation.
  • an IEEE 802.11 packet eg, IEEE 802.11a / b / g / n / ac / ax / be, etc.
  • the first STA 110 may perform an intended operation of the AP.
  • the processor 111 of the AP may receive a signal through the transceiver 113, process the received signal, generate a transmission signal, and perform control for signal transmission.
  • the memory 112 of the AP may store a signal (ie, a received signal) received through the transceiver 113 and may store a signal (ie, a transmitted signal) to be transmitted through the transceiver.
  • the second STA 120 may perform an intended operation of the Non-AP STA.
  • the non-AP transceiver 123 performs a signal transmission / reception operation.
  • an IEEE 802.11 packet eg, IEEE 802.11a / b / g / n / ac / ax / be, etc.
  • an IEEE 802.11 packet can be transmitted and received.
  • the processor 121 of the Non-AP STA may receive a signal through the transceiver 123, process the received signal, generate a transmission signal, and perform control for signal transmission.
  • the memory 122 of the non-AP STA may store a signal (ie, a received signal) received through the transceiver 123 and may store a signal (ie, a transmitted signal) to be transmitted through the transceiver.
  • the operation of the device indicated as the AP in the following specification may be performed in the first STA 110.
  • the operation of the device indicated by the AP is controlled by the processor 111 of the first STA 110, and a related signal is transmitted or received through the transceiver 113 controlled by the processor 111 of the first STA 110.
  • control information related to the operation of the AP or the transmission / reception signal of the AP may be stored in the memory 112 of the first STA 110.
  • the operation of the device indicated as non-AP in the following specification may be performed in the second STA 120.
  • the operation of the device marked as non-AP is controlled by the processor 121 of the second STA 120, and a related signal is transmitted through the transceiver 123 controlled by the processor 121 of the second STA 120. Or it can be received.
  • control information related to the operation of the non-AP or an AP transmission / reception signal may be stored in the memory 212 of the second STA 120.
  • WLAN wireless LAN
  • FIG. 2 shows the structure of an infrastructure basic service set (BSS) of the Institute of Electrical and Electronic Engineers (IEEE) 802.11.
  • BSS infrastructure basic service set
  • IEEE Institute of Electrical and Electronic Engineers
  • the wireless LAN system may include one or more infrastructure BSSs 200 and 205 (hereinafter, BSS).
  • BSSs 200 and 205 are a set of APs and STAs such as an access point (AP) and STA1 (Station, 200-1) that can successfully communicate with each other by synchronizing, and are not a concept indicating a specific area.
  • the BSS 205 may include one or more combineable STAs 205-1 and 205-2 in one AP 230.
  • the BSS may include at least one STA, APs 225 and 230 providing a distributed service, and a distributed system (DS, 210) connecting multiple APs.
  • DS distributed system
  • the distributed system 210 may connect multiple BSSs 200 and 205 to implement an extended service set (ESS) 240.
  • ESS 240 may be used as a term indicating one network formed by connecting one or several APs through the distributed system 210.
  • APs included in one ESS 240 may have the same service set identification (SSID).
  • the portal may serve as a bridge that performs a connection between a wireless LAN network (IEEE 802.11) and another network (eg, 802.X).
  • IEEE 802.11 IEEE 802.11
  • 802.X another network
  • a network between APs 225 and 230 and a network between APs 225 and 230 and STAs 200-1, 205-1 and 205-2 may be implemented.
  • a network that establishes a network even among STAs without APs 225 and 230 to perform communication is defined as an ad-hoc network or an independent basic service set (BSS).
  • an STA that transmits a probe request frame on channel 1 and receives a probe response frame on channel 1 stores BSS-related information included in the received probe response frame and then transmits the next channel (for example, number 2).
  • Channel to perform scanning (ie, probe request / response transmission / reception on channel 2) in the same way.
  • the scanning operation may be performed by a passive scanning method.
  • An STA performing scanning based on passive scanning may wait for a beacon frame while moving channels.
  • the beacon frame is one of the management frames in IEEE 802.11, and is transmitted periodically to inform the presence of the wireless network and allow STAs performing scanning to find the wireless network and participate in the wireless network.
  • the AP serves to periodically transmit the beacon frame
  • STAs in the IBSS rotate and transmit the beacon frame.
  • the STA performing scanning stores information on the BSS included in the beacon frame and records beacon frame information in each channel while moving to another channel.
  • the STA receiving the beacon frame may store BSS-related information included in the received beacon frame and move to the next channel to perform scanning in the next channel in the same manner.
  • the STA discovering the network may perform an authentication process through step SS320.
  • Such an authentication process may be referred to as a first authentication process in order to clearly distinguish the security setup operation of step S340, which will be described later.
  • the authentication process of S320 may include a process in which the STA sends an authentication request frame to the AP, and in response, the AP sends an authentication response frame to the STA.
  • the authentication frame used for authentication request / response corresponds to a management frame.
  • FIG. 4 is a diagram showing an example of a PPDU used in the IEEE standard.
  • PHY protocol data units As illustrated, various types of PHY protocol data units (PPDUs) have been used in standards such as IEEE a / g / n / ac. Specifically, the LTF and STF fields included training signals, and SIG-A and SIG-B included control information for the receiving station, and the data fields contained user data corresponding to PSDU (MAC PDU / Aggregated MAC PDU). Was included.
  • PPDUs PHY protocol data units
  • the HE PPDU according to FIG. 4 is an example of a PPDU for multiple users, and the HE-SIG-B is included only for multiple users, and the corresponding HE-SIG-B may be omitted in the PPDU for a single user.
  • HE-PPDU for multiple users is a legacy-short training field (L-STF), legacy-long training field (L-LTF), legacy-signal (L-SIG), High efficiency-signal A (HE-SIG-A), high efficiency-signal-B (HE-SIG-B), high efficiency-short training field (HE-STF), high efficiency-long training field (HE-LTF) , Data field (or MAC payload) and PE (Packet Extension) field.
  • L-STF legacy-short training field
  • L-LTF legacy-long training field
  • L-SIG legacy-signal
  • HE-SIG-A High efficiency-signal A
  • HE-SIG-B high efficiency-short training field
  • HE-LTF high efficiency-long training field
  • PE Packet Extension
  • the resource unit may include a plurality of subcarriers (or tones).
  • the resource unit may be used when transmitting signals to multiple STAs based on the OFDMA technique.
  • a resource unit may be defined when transmitting a signal to one STA.
  • Resource units can be used for STF, LTF, data fields, and the like.
  • Resource Units corresponding to different numbers of tones (ie, subcarriers) may be used to configure some fields of the HE-PPDU. For example, resources may be allocated in units of RU shown for HE-STF, HE-LTF, and data fields.
  • the RU arrangement of FIG. 5 is utilized not only for a situation for multiple users (MU), but also for a situation for single users (SU).
  • MU multiple users
  • SU single users
  • one 242-unit is used. It is possible to use and in this case 3 DC tones can be inserted.
  • FIG. 6 is a view showing the arrangement of a resource unit (RU) used on the 40MHz band.
  • RU resource unit
  • 484-RU when used for a single user, 484-RU can be used. Meanwhile, the fact that the specific number of RUs can be changed is the same as the example of FIG. 4.
  • FIG. 7 is a view showing the arrangement of a resource unit (RU) used on the 80MHz band.
  • RU resource unit
  • examples of FIG. 7 may also be 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, etc. have.
  • 7 DC tones can be inserted into the center frequency, 12 tones are used in the leftmost band of the 80 MHz band as a guard band, and 11 tones are located in the rightmost band of the 80 MHz band. It can be used as a guard band. It is also possible to use 26-RUs with 13 tones located on the left and right sides of the DC band.
  • 996-RU when used for a single user, 996-RU can be used, in which case 5 DC tones can be inserted.
  • the RU arrangement (ie, RU location) shown in FIGS. 5 to 7 may be applied to a new wireless LAN system (eg, EHT system) as it is. Meanwhile, in the 160 MHz band supported by the new WLAN system, the arrangement of the RU for 80 MHz (that is, the example of FIG. 7) is repeated twice or the arrangement of the RU for 40 MHz (that is, the example of FIG. 6) is 4 times It can be repeated. In addition, when the EHT PPDU is configured in the 320 MHz band, the arrangement of RUs for 80 MHz (example of FIG. 7) may be repeated 4 times or the arrangement of RUs for 40 MHz (ie, example of FIG. 6) may be repeated 8 times. have.
  • EHT PPDU is configured in the 320 MHz band
  • the arrangement of RUs for 80 MHz (example of FIG. 7) may be repeated 4 times or the arrangement of RUs for 40 MHz (ie, example of FIG. 6) may be repeated 8 times.
  • the RU described herein may be used for UL (Uplink) communication and DL (Downlink) communication.
  • the transmitting STA eg, AP
  • the second STA may be assigned a second RU (eg, 26/52/106 / 242-RU, etc.).
  • the first STA may transmit the first Trigger-based PPDU based on the first RU
  • the second STA may transmit the second Trigger-based PPDU based on the second RU.
  • the first / second trigger-based PPDU is transmitted to the AP in the same time interval.
  • the transmitting STA (eg, AP) allocates a first RU (eg, 26/52/106 / 242-RU, etc.) to the first STA, and A second RU (for example, 26/52/106 / 242-RU, etc.) may be allocated to the 2 STAs. That is, the transmitting STA (for example, the AP) can transmit the HE-STF, HE-LTF, and Data fields for the first STA through the first RU in one MU PPDU, and the second STA through the second RU. The HE-STF, HE-LTF, and Data fields for 2 STAs may be transmitted.
  • a first RU eg, 26/52/106 / 242-RU, etc.
  • a second RU for example, 26/52/106 / 242-RU, etc.
  • the HE-STF, HE-LTF, and Data fields for 2 STAs may be transmitted.
  • HE-SIG-B Information on the arrangement of the RU may be signaled through HE-SIG-B.
  • the HE-SIG-B field 810 includes a common field 820 and a user-specific field 830.
  • the common field 820 may include information commonly applied to all users (ie, user STAs) receiving SIG-B.
  • the user-individual field 830 may be referred to as a user-individual control field.
  • the user-individual field 830 may be applied to only some of a plurality of users when SIG-B is delivered to a plurality of users.
  • the common field 920 and the user-individual field 930 may be separately encoded.
  • the common field 920 may include N * 8 bits of RU allocation information.
  • the RU allocation information may include information regarding the location of the RU. For example, when a 20 MHz channel is used as shown in FIG. 5, the RU allocation information may include information on which RU (26-RU / 52-RU / 106-RU) is arranged in which frequency band. .
  • up to nine 26-RUs may be allocated to a 20 MHz channel.
  • the RU allocation information of the common field 820 is set as '00000000' as shown in Table 8
  • nine 26-RUs may be allocated to the corresponding channel (ie, 20 MHz).
  • the RU allocation information of the common field 820 is set as '00000001'
  • seven 26-RUs and one 52-RU are arranged in corresponding channels. That is, in the example of FIG. 5, 52-RU is allocated on the right-most side and seven 26-RU are allocated on the left side.
  • Table 1 shows only a part of RU locations that can be displayed by RU allocation information.
  • the RU allocation information may further include an example of Table 2 below.
  • a plurality of different STAs may be assigned to a plurality of RUs.
  • a plurality of STAs may be allocated based on the MU-MIMO technique.
  • the user-individual field 830 may include a plurality of user fields.
  • the number of STAs (eg, User STAs) allocated to a specific channel may be determined based on RU allocation information of the common field 820. For example, when the RU allocation information of the common field 820 is '00000000', one user STA may be allocated to each of the nine 26-RUs (that is, a total of nine user STAs are allocated). That is, up to 9 User STAs may be allocated to a specific channel through OFDMA. In other words, up to 9 User STAs can be assigned to a specific channel through a non-MU-MIMO technique.
  • the transmitting STA may perform channel access through contending (ie, backoff operation) and transmit a trigger frame 1030. That is, the transmitting STA (eg, AP) may transmit the PPDU including the Trigger Frame 1330.
  • a trigger-based (TB) PPDU is transmitted after a delay of SIFS.
  • Each of the individual user information fields 1160 # 1 to 1160 # N illustrated in FIG. 11 may include a plurality of subfields again.
  • FIG. 12 shows an example of a common information field of a trigger frame. Some of the subfields of FIG. 12 may be omitted, and other subfields may be added. Also, the length of each of the illustrated sub-fields can be changed.
  • the CP and LTF type field 1250 may include information on the length and CP length of the LTF of the uplink PPDU transmitted corresponding to the corresponding trigger frame.
  • the trigger type field 1060 may indicate the purpose for which the corresponding trigger frame is used, for example, normal triggering, triggering for beamforming, request for Block ACK / NACK, and the like.
  • the trigger type field 1260 of the trigger frame indicates a basic type trigger frame for normal triggering.
  • a basic type trigger frame may be referred to as a basic trigger frame.
  • the sub-field of FIG. 13 may include an MCS field 1340.
  • the MCS field 1340 may indicate an MCS technique applied to TB PPDU. For example, when BCC coding is applied to the TB PPDU, the coding type field 1330 may be set to '1', and when LDPC coding is applied, the coding type field 1330 may be set to '0'. have.
  • the illustrated first frequency domain 1510 to the fourth frequency domain 1540 may each include one channel.
  • the first frequency domain 1510 may include a channel 1 (a 20 MHz channel having an index 1).
  • the center frequency of channel 1 may be set to 2412 MHz.
  • the second frequency domain 1520 may include channel 6.
  • the center frequency of channel 6 may be set to 2437 MHz.
  • the third frequency domain 1530 may include channel 11.
  • the center frequency of the channel 11 may be set to 2462 MHz.
  • the fourth frequency domain 1540 may include channel 14. At this time, the center frequency of the channel 14 may be set to 2484 MHz.
  • 16 shows an example of a channel used / supported / defined within a 5 GHz band.
  • Multiple channels may be set in the 5 GHz band, and the bandwidth of each channel may be variously set to 20 MHz, 40 MHz, 80 MHz, or 160 MHz.
  • the 5170 MHz to 5330 MHz frequency range / range in UNII-1 and UNII-2 may be divided into eight 20 MHz channels.
  • the 5170 MHz to 5330 MHz frequency domain / range can be divided into four channels through the 40 MHz frequency domain.
  • the 5170 MHz to 5330 MHz frequency domain / range may be divided into two channels through the 80 MHz frequency domain.
  • the 5170 MHz to 5330 MHz frequency domain / range may be divided into one channel through the 160 MHz frequency domain.
  • the PPDU 1800 of FIG. 18 may be called various names such as an EHT PPDU, a transmitting PPDU, a receiving PPDU, a first type or an N type PPDU. In addition, it can be used in a new wireless LAN system with an improved EHT system and / or EHT system.
  • Subfields 1801 to 1810 of FIG. 18 may be changed to various names.
  • SIG A field 1805 is EHT-SIG-A field
  • SIG B field 1806 is EHT-SIG-B
  • STF field 1807 is EHT-STF field
  • LTF field 1808 is EHT- It can be called as an LTF field.
  • the L-SIG field of FIG. 18 may include, for example, 24-bit bit information.
  • the 24-bit information may include a rate field of 4 bits, a reserved bit of 1 bit, a length field of 12 bits, a parity bit of 1 bit, and a tail bit of 6 bits.
  • the 12-bit Length field may include information on the number of octets of the PSDU (Physical Service Data Unit).
  • the value of the 12-bit Length field may be determined based on the type of PPDU 1800. For example, when the PPDU 1800 is a non-HT, HT, VHT PPDU or an EHT PPDU, the value of the Length field may be determined as a multiple of 3.
  • the STF 1807 of FIG. 18 may be used to improve automatic gain control estimation in a multiple input multiple output (MIMO) environment or OFDMA environment.
  • the LTF of FIG. 18 can be used to estimate a channel in a MIMO environment or an OFDMA environment.
  • the EHT-LTF field may have first, second, and third types (ie, 1x, 2x, 4x LTF).
  • the first / second / third type LTF field may be generated based on an LTF sequence in which non-zero coefficients are arranged at 4/2/1 subcarrier intervals.
  • the first / second / third type LTF may have a time length of 3.2 / 6.4 / 12.8 ⁇ s.
  • various lengths of GI eg, 0.8 / 1/6 / 3.2 ⁇ s
  • the PPDU 1800 of FIG. 18 may be identified as an EHT PPDU based on the following method.
  • the receiving STA is 1) the first symbol after the L-LTF signal 1801 that is the BSPK, 2) the RL-SIG 1804 that is continuous to the L-SIG field 1803 and is identical to the L-SIG 1803. , And 3) Based on the L-SIG 1803 including a Length field in which the result of applying “modulo 3” is set to “0”, the received PPDU 1800 may be determined as an EHT PPDU.
  • the receiving STA may determine the type of the receiving PPDU 1800 as an HE PPDU based on the following. For example, 1) the first symbol after the L-LTF signal 1801 is BPSK, 2) the RL-SIG 1804 in which the L-SIG 1803 is repeated is detected, and 3) the L-SIG 1803 ) When the result of applying “modulo 3” to the Length value is detected as “1” or “2”, the received PPDU 1800 may be determined as the HE PPDU.
  • the receiving STA may determine the type of the receiving PPDU 1800 as non-HT, HT and VHT PPDU based on the following. For example, 1) the first symbol after the L-LTF signal 1801 is BPSK, 2) the RL-SIG 1804 in which the L-SIG 1803 is repeated is not detected, and 3) the L-SIG ( When the result of applying “modulo 3” to the Length value of 1803) is detected as “0”, the received PPDU 1800 may be determined to be non-HT, HT and VHT PPDU.
  • the STA (AP and / or non-AP STA) of the present specification may support multilink communication.
  • STAs supporting multi-link communication may simultaneously perform communication through a plurality of links. That is, the STA supporting multi-link communication may perform communication through a plurality of links during the first time period, and may perform communication through only one of the plurality of links during the second time period.
  • Multi-link communication may mean communication supporting a plurality of links, and the link is one channel defined in a 2.4 GHz band, a 5 GHz band, a 6 GHz band, and / or a specific band (for example, described below) , 20/40/80/160/240/320 MHz channel).
  • the concept of conventional channel bonding is described below.
  • two 20 MHz channels may be combined to perform 40 MHz channel bonding.
  • 40/80/160 MHz channel bonding may be performed in the IEEE 802.11ac system.
  • the STA may perform channel bonding for the primary 20 MHz channel (P20 channel) and the secondary 20 MHz channel (S20 channel).
  • a backoff count / counter may be used.
  • the backoff count value is selected as a random value and can be decreased during the backoff interval. In general, when the backoff count value becomes 0, the STA may attempt to access the channel.
  • the P20 channel is determined to be in the idle state during the backoff interval, and the backoff count value for the P20 channel becomes 0. interframe space)). If the S20 channel is in the Idle state, the STA may perform bonding for the P20 channel and the S20 channel. That is, the STA may transmit a signal (PPDU) through a 40 MHz channel (that is, a 40 MHz bonding channel) including a P20 channel and an S20 channel.
  • PPDU signal
  • the primary 20 MHz channel and the secondary 20 MHz channel may configure a 40 MHz channel (primary 40 MHz channel) through channel bonding. That is, the bonded 40 MHz channel may include a Primary 20 MHz channel and a Secondary 20 MHz channel.
  • Channel bonding may be performed when a channel consecutive to the primary channel is in an idle state. That is, the primary 20 MHz channel, the secondary 20 MHz channel, the secondary 40 MHz channel, and the secondary 80 MHz channel may be sequentially bonded. If the secondary 20 MHz channel is determined to be busy, the channel even if all other secondary channels are idle. Bonding may not be performed. In addition, when the secondary 20 MHz channel is determined to be in the idle state and the secondary 40 MHz channel is in the busy state, channel bonding may be performed only for the primary 20 MHz channel and the secondary 20 MHz channel.
  • the STA (AP and / or non-AP STA) of the present specification may support multilink communication. That is, the STA can transmit and receive signals simultaneously through the first link and the second link based on the multilink. That is, the multilink may refer to a technique in which one STA simultaneously transmits and receives signals through a plurality of links. For example, multi-link communication may also include transmitting a signal through one link and receiving a signal through another link. The STA supporting the multilink may use a plurality of links in the first time period and only one link in the second time period.
  • 20 is a view for explaining the technical characteristics of the link used in the multilink.
  • the first link 2010 and the second link 2020 can be used for multi-link.
  • the first link 2010 of FIG. 20 may be included, for example, within a 5 GHz band.
  • the second link 2020 of FIG. 20 may be included, for example, in a 6 GHz band.
  • Each link used for multilink may be included in the same band.
  • all links are included in the same band, or the first / second link is included in the first band and the third link is not 2 bands.
  • Multilinks may be configured based on different RF modules (eg IDFT / IFFT blocks). Additionally or alternatively, a plurality of links included in the multilink may be discontinuous in the frequency domain. That is, a frequency gap may exist in a frequency domain corresponding to the first link and a frequency domain corresponding to the second link among the plurality of links.
  • RF modules eg IDFT / IFFT blocks
  • An upper limit may be determined for the number of channels (and / or maximum bandwidth) included in one link used for multilink. For example, as in the example of FIG. 20, up to four channels may constitute one link. Additionally or alternatively, the maximum bandwidth of one link may be 160 MHz, 240 MHz, 320 MHz. Additionally or alternatively, one link may contain only contiguous channels. The specific figures above are subject to change.
  • the procedure of identifying / specifying / determining the link used for the multilink is related to the aggregation (or channel aggregation) procedure.
  • the STA may aggregate multiple links to perform multilink communication. That is, the STA may perform 1) a first procedure for identifying / specifying / determining a link aggregated for a multilink and 2) a second procedure for performing multilink communication through the identified / specified / determined link.
  • the STA may perform the first and second procedures as separate procedures, or simultaneously through one procedure.
  • the STA may transmit / receive information about a plurality of links constituting the multilink.
  • the AP may identify information on a band supporting multilink capability and / or a channel supporting multilink capability through Beacon, Probe Response, Association Response, and other control frames. Identification information can be transmitted. For example, when the AP can perform communication by aggregating some channels in the 5 GHz band and some channels in the 6 GHz band, identification information regarding the channels that can be aggregated may be transmitted to the User STA.
  • the second STAs 110 and 120 may acquire information related to multi-links including the first link and the second link used in the first STAs 110 and 120.
  • the first link and the second link may be configured in any one of the 2.4 GHz, 5 GHz, or 6 GHz frequency bands, respectively, and the first link and the second link may be configured in different frequency bands.
  • the information related to the multi-link may include information on which frequency band (for example, 2.4 GHz, 5 GHz or 6 GHz) the first link and the second link are respectively configured.
  • the second STAs 110 and 120 may receive a first frame (eg, PPDU) from the first STAs 110 and 120 through a first link.
  • the second STAs 110 and 120 may determine frame loss related to the second link.
  • the information that the first STA 110 and 120 transmits the third and fourth frames through the first link and the second link is transmitted to the second STA 110 and 120 explicitly. No, the first STA 110 and 120 transmits the frames through the first link and the second link, and then, through only one of the two links (for example, the first link), the frame (for example, the third) Even when transmitting), the second STAs 110 and 120 may determine that frame loss has occurred (eg, frame loss for the fourth frame).
  • 24 and 25 are diagrams illustrating an embodiment of a method for transmitting report information related to frame loss.
  • the first STAs 110 and 120 may receive a management frame including report information related to the second frame loss through the first link, and release the second link connection based on the report information. That is, the first STAs 110 and 120 may release the second link connection based on the report information related to the second frame loss and communicate with the second STAs 110 and 120 using only the first link. . Or, for example, the first STAs 110 and 120 may perform multi-link communication with the second STAs 110 and 120 through the first link and the third link.
  • the second STAs 110 and 120 include a first transmitting / receiving unit (eg, an RF unit) transmitting a signal using a first frequency band and a second transmitting signal using a second frequency band. It may include a transmitting and receiving unit (for example, RF unit).
  • the second link may be configured in the second frequency band.
  • the second transceiver may report the reporting information related to the frame loss of the second frame to the first transceiver.
  • the second transmission / reception unit transmits an element including information on frame loss for the second frame to the first transmission / reception unit in the form of Management MAC Protocol Data Unit (MMPDU) by utilizing On-Channel Tunneling (OCT). You can.
  • OCT is an operation specified in IEEE802.11.
  • 26 is a flowchart illustrating an embodiment of a method for reporting frame loss information.
  • the artificial neural network may include an input layer, an output layer, and optionally one or more hidden layers. Each layer contains one or more neurons, and the artificial neural network can include neurons and synapses connecting neurons. In an artificial neural network, each neuron may output a function value of an input function input through a synapse, a weight, and an active function for bias.

Landscapes

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

Abstract

Dans un système de réseau local (LAN) sans fil, une première station (STA) peut obtenir des informations relatives à une liaison multiple comprenant une première liaison et une seconde liaison qui sont utilisées dans une seconde STA. La première STA peut recevoir, de la seconde STA, une première trame par l'intermédiaire de la première liaison. La première STA peut déterminer la perte de trame associée à la seconde liaison et peut transmettre des informations de rapport concernant la perte de trame à la seconde STA par l'intermédiaire de la première liaison. Les informations de rapport peuvent comprendre des informations d'identification relatives à la seconde liaison.
PCT/KR2019/014254 2018-10-28 2019-10-28 Communication utilisant une liaison multiple dans un système lan sans fil WO2020091332A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862751697P 2018-10-28 2018-10-28
US62/751,697 2018-10-28

Publications (1)

Publication Number Publication Date
WO2020091332A1 true WO2020091332A1 (fr) 2020-05-07

Family

ID=70464179

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2019/014254 WO2020091332A1 (fr) 2018-10-28 2019-10-28 Communication utilisant une liaison multiple dans un système lan sans fil

Country Status (1)

Country Link
WO (1) WO2020091332A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111741500A (zh) * 2020-08-03 2020-10-02 成都极米科技股份有限公司 多链路场景下的漫游方法、多链路设备及存储介质
KR102206290B1 (ko) * 2020-09-18 2021-01-25 주식회사 도레미파 무선랜 시스템에서 주문 및 결제 정보 공유 시스템
WO2022033593A1 (fr) * 2020-08-14 2022-02-17 华为技术有限公司 Procédé de gestion de paramètres de bs clés applicable à de multiples liaisons, et appareil associé
US11510210B2 (en) 2021-02-09 2022-11-22 Cisco Technology, Inc. Flexible radio assignment for multi-link capable access points
WO2023197843A1 (fr) * 2022-04-11 2023-10-19 华为技术有限公司 Procédé et dispositif de communication
US11937316B2 (en) 2021-05-03 2024-03-19 Cisco Technology, Inc. Multi-link selection based on transmit power control (TPC)
US12010746B2 (en) 2021-02-04 2024-06-11 Cisco Technology, Inc. Multi-link device classification based neighbor discovery

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150282005A1 (en) * 2014-03-28 2015-10-01 Qualcomm Incorporated Link aggregation in wireless local area networks
US20180145919A1 (en) * 2016-11-23 2018-05-24 Qualcomm Incorporated Wi-fi link aggregation
US20180191554A1 (en) * 2006-02-10 2018-07-05 Aviat U.S., Inc. System and method for resilient wireless packet communications
JP2018113540A (ja) * 2017-01-10 2018-07-19 国立研究開発法人情報通信研究機構 無線通信装置、無線通信方法
US20180206143A1 (en) * 2017-01-19 2018-07-19 Qualcomm Incorporated Management procedure in multi-link aggregation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180191554A1 (en) * 2006-02-10 2018-07-05 Aviat U.S., Inc. System and method for resilient wireless packet communications
US20150282005A1 (en) * 2014-03-28 2015-10-01 Qualcomm Incorporated Link aggregation in wireless local area networks
US20180145919A1 (en) * 2016-11-23 2018-05-24 Qualcomm Incorporated Wi-fi link aggregation
JP2018113540A (ja) * 2017-01-10 2018-07-19 国立研究開発法人情報通信研究機構 無線通信装置、無線通信方法
US20180206143A1 (en) * 2017-01-19 2018-07-19 Qualcomm Incorporated Management procedure in multi-link aggregation

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111741500A (zh) * 2020-08-03 2020-10-02 成都极米科技股份有限公司 多链路场景下的漫游方法、多链路设备及存储介质
CN111741500B (zh) * 2020-08-03 2020-12-01 成都极米科技股份有限公司 多链路场景下的漫游方法、多链路设备及存储介质
US11963046B2 (en) 2020-08-03 2024-04-16 Chengdu Xgimi Technology Co., Ltd. Roaming method in a multi-link scenario, multi-link device, and storage medium
WO2022033593A1 (fr) * 2020-08-14 2022-02-17 华为技术有限公司 Procédé de gestion de paramètres de bs clés applicable à de multiples liaisons, et appareil associé
KR102206290B1 (ko) * 2020-09-18 2021-01-25 주식회사 도레미파 무선랜 시스템에서 주문 및 결제 정보 공유 시스템
US12010746B2 (en) 2021-02-04 2024-06-11 Cisco Technology, Inc. Multi-link device classification based neighbor discovery
US11510210B2 (en) 2021-02-09 2022-11-22 Cisco Technology, Inc. Flexible radio assignment for multi-link capable access points
US11937316B2 (en) 2021-05-03 2024-03-19 Cisco Technology, Inc. Multi-link selection based on transmit power control (TPC)
WO2023197843A1 (fr) * 2022-04-11 2023-10-19 华为技术有限公司 Procédé et dispositif de communication

Similar Documents

Publication Publication Date Title
WO2020091331A1 (fr) Émission de signal à l'aide de liaisons multiples dans un système lan sans fil
WO2020091332A1 (fr) Communication utilisant une liaison multiple dans un système lan sans fil
WO2020032633A1 (fr) Procédé et dispositif de transmission d'un signal via de multiples liaisons dans un système de lan sans fil
WO2020085824A1 (fr) Procédé et dispositif de commande de liaisons multiples dans un système lan sans fil prenant en charge de multiples liaisons
WO2022114468A1 (fr) Procédé et appareil pour transmettre une ppdu su à une sta homologue dans une période de txop attribuée par une trame de déclenchement dans un système lan sans fil
WO2020040552A1 (fr) Procédé et dispositif pour obtenir des informations concernant une entité de communication fonctionnant dans une nouvelle bande dans un système lan sans fil
WO2020060145A1 (fr) Technique pour commander une pluralité de liaisons de communication sans fil
WO2022005165A1 (fr) Procédé de transmission p2p dans un système lan sans fil
WO2020009425A1 (fr) Procédé et dispositif d'identification de paquet dans un système lan sans fil
WO2020180047A1 (fr) Sélection d'ap pour une transmission de signal à l'aide d'une pluralité d'ap
WO2021033882A1 (fr) Nouvelle catégorie d'accès pour faible latence
WO2020231062A1 (fr) Maintien de liaison dans un système à ap multiples
WO2021033881A1 (fr) Négociation pour file d'attente à faible latence
WO2020180048A1 (fr) Commande de transmission de signal à l'aide d'une pluralité d'ap
WO2022186672A1 (fr) Procédé et dispositif d'émission et de réception d'un profil complet dans un élément ml dans un système lan sans fil
WO2022108327A1 (fr) Trame de déclenchement améliorée
WO2020022712A1 (fr) Procédé et dispositif d'identification d'informations d'un canal dans un système lan sans fil
WO2021091029A1 (fr) Transmission compressée ltf
WO2021033880A1 (fr) Procédé d'accès aléatoire d'accès ofdma pour une faible latence
WO2020050649A1 (fr) Procédé et dispositif de transmission d'informations relatives à une liaison dans un système lan sans fil
WO2020085783A1 (fr) Procédé de configuration de champ de signal dans un système de communications sans fil
WO2019235861A1 (fr) Procédé et appareil pour identifier un paquet dans un système wlan
WO2022124831A1 (fr) Configuration d'un trame de déclenchement
WO2022173218A1 (fr) Opération améliorée pour twt restreint
WO2022092622A1 (fr) Procédé et dispositif de réception d'informations sur un intervalle de balise d'un autre ap dans un mld de transmission dans un système wlan

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19878696

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19878696

Country of ref document: EP

Kind code of ref document: A1