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WO2017118297A1 - Procédé de transmission de données, dispositif et support de stockage informatique associés - Google Patents

Procédé de transmission de données, dispositif et support de stockage informatique associés Download PDF

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Publication number
WO2017118297A1
WO2017118297A1 PCT/CN2016/111553 CN2016111553W WO2017118297A1 WO 2017118297 A1 WO2017118297 A1 WO 2017118297A1 CN 2016111553 W CN2016111553 W CN 2016111553W WO 2017118297 A1 WO2017118297 A1 WO 2017118297A1
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WO
WIPO (PCT)
Prior art keywords
radio frame
bss
station
identification information
cts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/111553
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English (en)
Chinese (zh)
Inventor
李瑞梅
吕开颖
邢卫民
孙波
韩志强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201610506655.5A external-priority patent/CN106954273B/zh
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2017118297A1 publication Critical patent/WO2017118297A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • 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
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H04W8/28—Number portability ; Network address portability

Definitions

  • the present invention relates to the field of communications, and in particular to a method, an apparatus, and a computer storage medium for data transmission.
  • AP Access Point
  • STA stations
  • BSS Basic Service Set
  • OBSS Overlapping BSS
  • SR Spatial Reuse
  • the station When receiving a radio frame from the OBSS, the station raises the threshold by detecting the traditional channel space, that is, the channel is busy according to the OBSS_PD threshold. If the received OBSS radio frame channel energy is lower than the OBSS_PD threshold, the channel is considered to be idle, and the contention channel is started to perform radio frame transmission, thereby performing spatial multiplexing transmission with the OBSS, thereby improving system spectrum utilization.
  • a frame interaction protection mechanism of Request To Send/Clear To Send (RTS/CTS) is used to protect subsequent radio frame transmissions of the sender and the receiver.
  • the physical frame format of the RTS/CTS usually adopts a non-HT format that can be parsed by a conventional site, and the physical frame header of the non-HT format does not have BSS identification information.
  • the media access control (MAC) frame header of the CTS frame only the receiving address information is included.
  • the access point (AP) sends the CTS frame, the receiving address is the address information of the site, and the BSS identification information cannot be identified.
  • the first condition for spatial multiplexing is to distinguish between BSS transmission and OBSS transmission. The input, therefore, needs to be solved how to identify the BSS transmission and the OBSS transmission in the RTS/CTS frame exchange, so that it can be determined whether the spatial multiplexing transmission can be performed after the RTS/CTS frame exchange.
  • embodiments of the present invention provide a data transmission method, apparatus, and computer storage medium.
  • a data transmission method including:
  • the sending station sends a radio frame, where the radio frame carries the BSS identification information of the BSS where the sending station is located, and the radio frame further carries indication information, where the indication information is used to indicate whether the radio frame is carried.
  • the BSS identification information is BSS color identification information (BSS color) or BSS identity information (BSSID).
  • the sending station before sending the radio frame, the sending station includes:
  • the radio frame is a frame that responds to the channel reservation request frame.
  • the indication information is carried in a MAC signaling part of the radio frame.
  • the BSS ID information refers to a 48-bit MAC address of an access point of the BSS where the sending station is located.
  • the BSSID is a MAC address of the sending station
  • the BSSID is a MAC address of an access point of the BSS where the sending station is located.
  • the BSSID is a MAC address that is commonly recognized by the access point corresponding to the multiple BSS identification information set.
  • the BSSID is carried in a receiving address field of the radio frame.
  • the radio frame further carries a spatial multiplexing parameter.
  • the spatial multiplexing parameter is carried in the MAC signaling of the radio frame.
  • the spatial multiplexing parameter includes at least one of: a transmit power of the transmitting station, an interference level that the transmitting station can tolerate, and a clear channel assessment (CCA) threshold of the transmitting station.
  • CCA clear channel assessment
  • the CCA threshold refers to a CCA threshold used by the sending station to determine whether the channel is busy or not when receiving an overlapping basic service set OBSS frame.
  • a method of data transmission including:
  • the station receives the radio frame
  • the radio frame carries the BSS identification information
  • the BSS identification information is obtained, where the BSS identification information is a BSS color or a BSSID of a sending station of the radio frame.
  • the station in a preset time period before the station receives the radio frame, and the station sends a channel reservation request frame to a sending station of the radio frame, the station carries according to the radio frame.
  • the BSS identification information is matched with the BSS identification information of the station, and if the matching is performed, the station is a destination receiving station of the radio frame, where the radio frame is a frame that responds to the reservation request frame;
  • the station performs matching with the BSS identification information of the station according to the BSS identification information carried in the radio frame. If the station matches, the station is a third-party receiving station and the radio frame is a radio frame of the BSS where the station is located. If not, the station is a third-party receiving station and the radio frame is an OBSS radio frame, or
  • the station according to the BSS identification information carried in the radio frame and the multiple BSS of the station The BSS identification information in the identification information set is matched. If the matching is performed, the station is a third-party receiving station and the radio frame is a radio frame of the BSS where the station is located. If not, the station is a third-party receiving station.
  • the radio frame is a radio frame that overlaps the basic service set OBSS, or
  • the station matches the specific BSS identification information of the station according to the BSS identification information carried in the radio frame. If the station matches, the station is a third-party receiving station and the radio frame is the BSS where the station is located. If the radio frame does not match, the station is a third-party receiving station and the radio frame is a radio frame of the OBSS.
  • the specific BSS identification information is identification information that is commonly recognized by the access point corresponding to the multiple BSS identification information set, when the BSS identifier is used.
  • the specific BSSID is a MAC address that is commonly recognized by the access point corresponding to the multiple BSSID set.
  • the third-party receiving station determines whether to update the third-party receiving station according to a duration field of the radio frame.
  • Network allocation vector NAV
  • the third party station is ready for spatial multiplexing transmission.
  • a device for data transmission located at a transmitting station, comprising:
  • a sending module configured to send a radio frame, where the radio frame carries BSS identification information of a basic service set BSS of the sending station, where the radio frame further carries indication information, where the indication information is used to indicate Whether the radio frame carries the BSS identification information, where the BSS identification information is a BSS color identification information BSS color or a BSS identity information BSSID.
  • a device for data transmission located at a site, comprising:
  • a receiving module configured to receive a wireless frame
  • Obtaining a module configured to determine, according to the indication information in the radio frame, whether the BCS identification information is carried in the radio frame, and if the radio frame carries the BSS identification information, obtain the BSS identification information, where the BSS The identification information is BSS color identification information BSS color or BSS identity information BSSID of the transmitting station of the radio frame.
  • a computer storage medium comprising a set of instructions that, when executed, cause a method by which at least one processor performs the data transfer described above.
  • the sending station sends a radio frame, where the radio frame carries the BSS identification information of the BSS where the sending station is located, and the radio frame further carries indication information, where the indication information is used to indicate whether the radio frame is
  • the BSS identification information is carried, wherein the BSS identification information is a BSS color or a BSSID, which solves the problem of how to identify the BSS transmission and the OBSS transmission in the RTS/CTS frame exchange, and implements spatial multiplexing transmission.
  • FIG. 1 is a flow chart 1 of a method of data transmission according to an embodiment of the present invention.
  • FIG. 2 is a second flowchart of a method of data transmission according to an embodiment of the present invention.
  • FIG. 3 is a structural block diagram 1 of an apparatus for data transmission according to an embodiment of the present invention.
  • FIG. 4 is a structural block diagram 2 of an apparatus for data transmission according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a scenario of data transmission according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a frame format of a CTS carrying indication information and BSSID identification information according to an embodiment of the present invention
  • FIG. 7 is a bearer indication information and BSSID identification information, which is empty according to an embodiment of the present invention.
  • FIG. 8 is a flow chart of a transmitting node transmitting the CTS of FIG. 6 or FIG. 7 according to an embodiment of the present invention
  • FIG. 9 is a flow chart of a receiving node transmitting the CTS of FIG. 6 or FIG. 7 according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a frame format of a CTS carrying indication information and BSS Color identification information according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of a frame format of a CTS carrying indication information and BSS Color identification information, spatial multiplexing parameters, according to an embodiment of the present invention
  • FIG. 12 is a flowchart of a transmitting node transmitting the CTS of FIG. 10 or FIG. 11 according to an embodiment of the present invention
  • FIG. 13 is a flow diagram of a receiving node transmitting the CTS of FIG. 10 or FIG. 11 in accordance with an embodiment of the present invention.
  • the transmitting station sends a radio frame, where the radio frame carries the BSS identification information of the basic service set BSS of the sending station, and the radio frame further carries the indication information.
  • the indication information is used to indicate whether the radio frame carries the BSS identification information, where the BSS identification information is a BSS color or a BSSID.
  • FIG. 1 is a flowchart 1 of a method for data transmission according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 carrying the BSS identification information of the BSS where the transmitting station is located in the radio frame, and carrying the indication information in the radio frame, where the indication information is used to indicate whether the radio frame carries the BSS identification information, where the BSS identification information Is BSS color or BSSID;
  • step S104 the transmitting station sends a radio frame.
  • step S102 and step S104 may be a step.
  • the radio frame sent by the sending station carries the BSS identification information
  • the radio frame further carries the indication information, where the indication information is used to indicate whether the radio frame carries the BSS identification information, and how to solve the RTS.
  • the problem of identifying BSS transmission and OBSS transmission in /CTS frame exchange realizes spatial multiplexing transmission.
  • the transmitting station receives a channel reservation request frame whose destination address is the transmitting station before transmitting the radio frame, wherein the radio frame is a frame that responds to the channel reservation request frame.
  • the wireless frame is transmitted using a compatibility mode or a legacy mode.
  • the indication information is carried in a MAC signaling portion of the radio frame.
  • the BSS ID information refers to a 48-bit MAC address of an access point of the BSS where the transmitting station is located.
  • the BSSID is a MAC address of the sending station
  • the BSSID is the MAC address of the access point of the BSS where the sending station is located.
  • the BSSID is a specific BSSID
  • the specific BSSID is an access corresponding to the multiple BSS identification information set.
  • the BSSID is carried in the receive address field of the radio frame.
  • the radio frame also carries spatial multiplexing parameters.
  • the spatial multiplexing parameter is carried in the MAC signaling of the radio frame.
  • the spatial multiplexing parameter comprises at least one of: a transmit power of the transmitting station, an interference level tolerable by the transmitting station, and a CCA threshold of the transmitting station.
  • the CCA threshold refers to a CCA threshold used by the transmitting station to determine whether the channel is busy or not when receiving an overlapping basic service set OBSS frame.
  • FIG. 2 is a second flowchart of a method for data transmission according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 the station receives the radio frame
  • Step S204 determining, according to the indication information in the radio frame, whether the BSS identification information is carried in the radio frame;
  • Step S206 If the radio frame carries the BSS identification information, obtain the BSS identification information, where the BSS identification information is a BSS color or a BSSID of a sending station of the radio frame.
  • the station receives the radio frame, and determines whether the radio frame carries the BSS identification information according to the indication information in the radio frame. If the radio frame carries the BSS identification information, the BSS identification information is obtained, where the BSS identification information is obtained.
  • the problem of how to identify the BSS transmission and the OBSS transmission in the RTS/CTS frame exchange is solved, and spatial multiplexing transmission is realized.
  • the station in a preset time period before the station receives the radio frame, and the station sends a channel reservation request frame to the sending station of the radio frame, the station is carried according to the radio frame.
  • the BSS identification information is matched with the BSS identification information of the site, and if it matches, the site is a destination receiving station of the radio frame, where the radio frame is a frame that responds to the reservation request frame;
  • the station matches the BSS identification information carried in the radio frame according to the BSS identification information carried in the radio frame. If the station matches, the station is a third-party receiving station and the radio frame is a radio frame of the BSS where the station is located. If not, the station The station is a third-party receiving station and the radio frame is an OBSS radio frame, or
  • the station matches the BSS identification information carried in the radio frame with the BSS identification information in the multiple BSS identification information set of the station. If the station matches, the station is a third-party receiving station and the radio frame is the wireless of the BSS where the station is located. If the frame does not match, the station is a third-party receiving station and the radio frame is an OBSS radio frame, or
  • the station matches the specific BSS identification information of the station according to the BSS identification information carried in the radio frame. If the station matches, the station is a third-party receiving station and the radio frame is the BSS where the station is located. If the radio frame does not match, the station is a third-party receiving station and the radio frame is a radio frame of the OBSS.
  • the specific BSS identification information is identification information that is commonly recognized by the access point corresponding to the multiple BSS identification information set, when the BSS identifier is used.
  • the specific BSSID is a MAC address that is jointly identified by the access point corresponding to the multiple BSSID set, where the multiple BSS identification information set is determined by multiple of the multiple access points. BSS identification information.
  • the third-party receiving station determines whether to update the NAV of the third-party receiving station according to the duration field of the radio frame;
  • the third party station is ready for spatial multiplexing transmission.
  • module may implement a combination of software and/or hardware of a predetermined function.
  • apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 3 is a structural block diagram of an apparatus for data transmission according to an embodiment of the present invention. As shown in FIG. 3, the apparatus is located in a transmitting station, and the apparatus includes:
  • the setting module 32 carries the BSS identification information of the basic service set BSS of the transmitting station in the radio frame, and carries the indication information in the radio frame, where the indication information is used to indicate whether the radio frame carries the BSS identification information, where
  • the BSS identification information is a BSS color or a BSSID;
  • the sending module 34 is connected to the setting module 32 and configured to transmit a radio frame.
  • the setting module 32 and the sending module 34 can be used as one module.
  • the setting module 32 carries the BSS identification information of the BSS where the transmitting station is located in the radio frame, and also carries the indication information in the radio frame, and the sending module 34 sends the radio frame, which solves how to identify the BSS in the RTS/CTS frame exchange.
  • the problem of transmission and OBSS transmission enables spatial multiplexing transmission.
  • the setting module 32 can be implemented by a processor in a device for data transmission; the transmitting module can be implemented by a transceiver in a device for data transmission.
  • FIG. 4 is a structural block diagram 2 of an apparatus for data transmission according to an embodiment of the present invention. As shown in FIG. 4, the apparatus is located in a station, and the apparatus includes
  • the receiving module 42 is configured to receive a radio frame.
  • the obtaining module 44 is connected to the receiving module 42 and configured to determine whether the BCS identification information is carried in the radio frame according to the indication information in the radio frame. If the radio frame carries the BSS identification information, the BSS identification information is obtained.
  • the BSS identification information is the BSS color identification information BSS color or the BSS identity information BSSID of the transmitting station of the radio frame.
  • the receiving module 42 is configured to receive the radio frame
  • the obtaining module 44 is configured to determine, according to the indication information in the radio frame, whether the radio frame carries the BSS identification information, and if the radio frame carries the BSS identification information, obtain the BSS.
  • the identification information solves the problem of how to identify the BSS transmission and the OBSS transmission in the RTS/CTS frame exchange, and realizes spatial multiplexing transmission.
  • the receiving module 42 can be implemented by a transceiver in a device for data transmission; the obtaining module 44 can be implemented by a processor in a device for data transmission.
  • FIG. 5 is a schematic diagram of a scenario of data transmission according to an embodiment of the present invention. As shown in FIG. 5, there are two BSSs: BSS1 and BSS2.
  • BSS 1 includes AP1 (High Efficiency), STA1 (HE), STA2 (HE), and STA3 (legacy).
  • the HE site in BSS1 supports spatial multiplexing.
  • AP1 and STA1 enable spatial multiplexing, and STA2 does not enable spatial multiplexing.
  • STA3 does not support spatial multiplexing.
  • AP2 HE
  • STA4 HE
  • STA5 legacy
  • the HE site in BSS2 supports spatial multiplexing.
  • AP2 and STA4 enable spatial multiplexing, and STA5 does not support spatial multiplexing.
  • FIG. 6 is a schematic diagram of a frame format of a CTS carrying indication information and BSSID identification information according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a frame format of a CTS carrying indication information and BSSID identification information, spatial multiplexing parameters, according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of a frame format of a CTS carrying indication information and BSS Color identification information according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of a frame format of a CTS carrying indication information and BSS Color identification information, spatial multiplexing parameters, as shown in FIG. 6, 7, 10, and 11 according to an embodiment of the present invention.
  • Embodiment 1 describes an interaction process of RTS/CTS (FIG. 6) in uplink transmission
  • Embodiment 2 describes an interaction process of RTS/CTS (FIG. 6) in downlink transmission
  • Embodiment 3 describes an interaction process of RTS/CTS (FIG. 7) in uplink transmission
  • Embodiment 4 describes an interaction process of RTS/CTS (FIG. 7) in downlink transmission
  • Embodiment 5 describes an interaction process of RTS/CTS (FIG. 10) in uplink transmission
  • Embodiment 6 describes an interaction process of RTS/CTS (FIG. 11) in downlink transmission
  • Embodiment 7 describes an interaction process of RTS/CTS in uplink transmission when multiple BSSIDs are used
  • Embodiment 8 describes an interaction process of RTS/CTS in downlink transmission when multiple BSSIDs are used
  • Embodiment 9 describes an interaction process of RTS/CTS in uplink transmission when a specific BSSID is described
  • each AP has only one BSS, and the BSS identification information is the BSSID or BSS Color of the AP.
  • each AP has multiple BSSs, and each BSS has a unique BSSID or BSS Color, and these BSSIDs or BSS Colors constitute a BSS identification information set. It is assumed that there are three BSSIDs in the BSS identification information set of AP1: BSSID1a, BSSID1b, and BSSID1c.
  • the BSSID between AP1 and the associated STA1 is BSSID1a
  • the BSSID between AP1 and the associated STA2 is BSSID1b
  • the BSSID between AP1 and the associated STA3 is BSSID1c.
  • the BSSID between AP2 and the associated STA4 is BSSID2a
  • the BSSID between AP2 and the associated STA5 is BSSID2b.
  • AP1 uses one specific BSS identification information BSSID1a instead of the identification information set (BSSID1a, BSSID1b, BSSID1c), and AP2 uses one specific BSS identification information BSSID2a instead of the identification information set (BSSID2a, BSSID2b).
  • BSSID1a the identification information set
  • BSSID1b the identification information set
  • BSSID2a the identification information set
  • Each station in AP1 considers the radio frame with the destination address BSSID1a as the frame in the BSS, otherwise it is the OBSS frame
  • each station in AP2 considers the radio frame with the destination address BSSID2a as the frame in the BSS, otherwise it is the OBSS frame.
  • FIG. 8 is a flowchart of the sending node transmitting the CTS of FIG. 6 or FIG. 7 according to an embodiment of the present invention
  • FIG. 9 is a sending node sending diagram according to an embodiment of the present invention. 6 or the flow chart of the CTS of FIG. As shown in Figure 8, Figure 9,
  • STA 1 performs uplink transmission with AP1 and uses RTS/CTS to protect the channel.
  • STA1 sends an RTS to AP1 to reserve a channel.
  • AP 1 receives the RTS, and knows that the sending station of the RTS is STA1 through the sending address of the RTS.
  • the indication information is added to the MAC signaling, indicating that the CTS carries the BSS identification information.
  • AP1 copies the receiving address of the RTS to the RA domain of the CTS, that is, the BSSID of the BSS1, or directly writes the BSSID of the AP1 into the RA domain of the CTS.
  • STA1 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the CTS MAC signaling has the above indication information.
  • the receiving address of the CTS is the BSSID of the BSS1, and the CTS is received after the short interframe interval after the RTS is sent by itself.
  • the STA1 considers that this is the CTS of the RTS sent by itself. Get transmission opportunities.
  • STA2 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the above-mentioned indication information is included in the MAC signaling of the CTS.
  • the receiving address of the CTS is the BSSID of the BSS1
  • the STA2 considers that the CTS is a frame in the BSS, and the STA2 does not send the RTS before receiving the CTS, and the STA2 determines whether to update according to the duration of the CTS. Your own NAV.
  • STA3 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • STA3 reads the RA field of the CTS and finds that it is not the receiving address, it determines whether to update its own NAV according to the continuity of the CTS.
  • STA4 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the above-mentioned indication information is included in the MAC signaling of the CTS.
  • the receiving address of the CTS is the BSSID of the BSS1, not the BSSID of the own AP, and the STA 4 considers that the CTS is the OBSS. Frame. After determining the OBSS frame, STA4 is ready to perform spatial multiplexing operation.
  • the processing procedure in which the STA 5 receives the CTS is the same as the processing in which the STA 3 receives the CTS.
  • This embodiment describes the interaction process of the RTS/CTS. The specific process is shown in FIG. 8 and FIG. 9.
  • AP1 and STA 1 perform downlink transmission, and use RTS/CTS to protect the channel.
  • AP1 sends an RTS to STA1.
  • STA1 receives the RTS and knows that the sending site of the RTS is AP1 through the sending address of the RTS.
  • the STA1 adds indication information to the MAC signaling, indicating that the CTS carries the BSS identification information.
  • the STA1 copies the transmission address of the RTS to the RA domain of the CTS, that is, the BSSID of the BSS, or directly writes the BSSID of the AP1 to the RA domain of the CTS.
  • AP1 receives the CTS, and the receiving address of the CTS is the MAC address of AP1. AP1 considers that this is a CTS that responds to the RTS that it sends, and successfully obtains the transmission opportunity.
  • STA2 receives the CTS.
  • the above-mentioned indication information is included in the MAC signaling of the CTS.
  • the receiving address of the CTS is the BSSID of the BSS1
  • the STA2 considers that the CTS is a frame in the BSS, and the STA2 does not send the RTS before receiving the CTS, and the STA2 determines whether to update according to the duration of the CTS. Your own NAV.
  • STA3 receives the CTS, and STA3 reads the RA field of the CTS and finds that it is not the receiving address. Then, according to the duration of the CTS, it is determined whether to update its own NAV.
  • STA4 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling. If the receiving address of the CTS is the BSSID of the BSS1 and is not the BSSID of the own AP, the STA4 considers that the CTS is the OBSS frame. After determining the OBSS frame, STA4 is ready to perform spatial multiplexing operation.
  • the processing procedure in which the STA 5 receives the CTS is the same as the processing in which the STA 3 receives the CTS.
  • This embodiment describes the interaction process of the RTS/CTS. The specific process is shown in FIG. 8 and FIG. 9.
  • STA 1 performs uplink transmission with AP1 and uses RTS/CTS to protect the channel.
  • STA1 sends an RTS to AP1 to reserve a channel.
  • AP1 receives the RTS, and knows that the sending station of the RTS is STA1 through the sending address of the RTS.
  • the indication information is added to the MAC signaling, indicating that the CTS carries the BSS identification information and the spatial multiplexing parameter.
  • AP1 copies the receiving address of the RTS to the RA domain of the CTS, that is, the BSSID of the BSS1, or directly writes the BSSID of the AP1 into the RA domain of the CTS.
  • a spatial multiplexing parameter is added to the reservation ratio of the MAC signaling, as shown in FIG.
  • STA1 receives the CTS, and the CTS MAC signaling has the foregoing indication information, and the receiving address of the CTS is the BSSID of the BSS1, and is received after the short interframe interval after transmitting the RTS.
  • CTS STA1 thinks that this is a CTS that responds to the RTS that it sends, and successfully obtains the transmission opportunity.
  • STA 2 receives the CTS, and the CTS has the above indication information in the MAC signaling.
  • the receiving address of the CTS is the BSSID of the BSS1
  • the STA2 considers that the CTS is a frame in the BSS, and the STA2 does not send before receiving the CTS.
  • RTS STA2 determines whether to update its own NAV according to the duration of CTS.
  • STA 3 receives the CTS, and STA3 reads the RA field of the CTS and finds that it is not the receiving address, and determines whether to update its own NAV according to the duration of the CTS.
  • STA4 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling. If the receiving address of the CTS is the BSSID of the BSS1 and is not the BSSID of the own AP, the STA4 considers that the CTS is the OBSS frame. STA4 acquires spatial multiplexing parameters in the MAC signaling, and prepares for spatial multiplexing.
  • the processing procedure in which the STA 5 receives the CTS is the same as the processing in which the STA 3 receives the CTS.
  • This embodiment describes the interaction process of the RTS/CTS. The specific process is shown in FIG. 8 and FIG. 9.
  • AP1 and STA 1 perform downlink transmission, and use RTS/CTS to protect the channel.
  • AP1 sends an RTS to STA1.
  • STA1 receives the RTS and knows that the sending site of the RTS is AP1 through the sending address of the RTS.
  • the STA1 adds indication information to the MAC signaling, indicating that the CTS carries the BSS identification information and the spatial multiplexing parameter.
  • the STA1 copies the transmission address of the RTS to the RA domain of the CTS, that is, the BSSID of the BSS, or directly writes the BSSID of the AP1 to the RA domain of the CTS.
  • STA1 adds spatial multiplexing parameters to the MAC signaling of the CTS.
  • AP1 receives the CTS, and the receiving address of the CTS is the MAC address of AP1. AP1 considers that this is a CTS that responds to the RTS that it sends, and successfully obtains the transmission opportunity.
  • STA 2 receives the CTS, and the CTS has the above indication information in the MAC signaling.
  • the receiving address of the CTS is the BSSID of the BSS1
  • the STA2 considers that the CTS is a frame in the BSS, and the STA2 does not send before receiving the CTS.
  • RTS STA2 determines whether to update its own NAV according to the duration of CTS.
  • STA3 receives the CTS, and STA3 reads the RA field of the CTS and finds that it is not the receiving address. Then, according to the duration of the CTS, it is determined whether to update its own NAV.
  • STA4 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling.
  • the receiving address of the CTS is the BSSID of the BSS1, and is not the BSSID of the own AP.
  • the STA 2 considers that the CTS is the OBSS frame.
  • STA4 acquires spatial multiplexing parameters in the MAC signaling, and prepares for spatial multiplexing.
  • the process of receiving the CTS by STA5 is the same as the process of receiving the CTS by ST3.
  • FIG. 12 is a specific implementation according to the present invention.
  • the sending node of the example sends a flowchart of the CTS of FIG. 10 or FIG. 11.
  • FIG. 13 is a flowchart of the receiving node transmitting the CTS of FIG. 10 or FIG. 11 according to an embodiment of the present invention.
  • the specific process is shown in FIG. 12 and FIG. .
  • STA 1 performs uplink transmission with AP1 and uses RTS/CTS to protect the channel.
  • STA1 sends an RTS to AP1 to reserve a channel.
  • AP1 receives the RTS, and knows that the sending station of the RTS is STA1 through the sending address of the RTS.
  • the indication information is added to the MAC signaling, indicating that the BTS carries the BSS identification information BSS Color.
  • AP1 adds the BSS Color to the MAC signaling of the CTS.
  • STA1 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling.
  • the BSS Color of the CTS is the identification information of the BSS, and the receiving address of the CTS is itself, and the STA1 successfully obtains the transmission. opportunity.
  • STA 2 receives the CTS, and the CTS MAC signaling has the above indication information, and the BSS Color of the CTS is the identification information of the own BSS, but the receiving address of the CTS is not itself, and the STA2 determines according to the continuity of the CTS. Whether to update your own NAV.
  • STA3 receives the CTS, and STA3 reads the RA field of the CTS and finds that it is not the receiving address, and then determines whether to update its own NAV according to the duration of the CTS.
  • STA4 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling. If the BSS Color of the CTS is not the identification information of the own BSS, the STA4 considers that the CTS is a frame of the OBSS. After determining the OBSS frame, STA4 is ready to perform spatial multiplexing operation.
  • the process of receiving the CTS by the STA5 is the same as the process of receiving the CTS by the STA3.
  • This embodiment describes the interaction process of the RTS/CTS. The specific process is shown in FIG. 12 and FIG.
  • AP1 and STA 1 perform downlink transmission, and use RTS/CTS to protect the channel.
  • AP1 sends an RTS to STA1.
  • STA1 receives the RTS and knows that the sending site of the RTS is AP1 through the sending address of the RTS. As shown in FIG. 11, when the CTS is sent, the STA1 adds indication information to the MAC signaling, indicating that the CTS carries the BSS identification information BSS Color and the spatial multiplexing parameter. STA1 adds a BSS Color to the MAC signaling of the CTS, and adds spatial multiplexing parameters to the RA domain.
  • AP1 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling.
  • the BSS Color of the CTS is the identification information of the BSS, and the AP1 is waiting for the CTS before receiving the CTS, and the AP1 successfully obtains the transmission opportunity.
  • STA2 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling.
  • the BSS Color of the CTS is the identification information of the BSS, and the STA2 considers that the CTS is the frame in the BSS, and the STA2 does not receive the CTS before receiving the CTS. Waiting for the CTS, STA2 determines whether to update its own NAV according to the duration of the CTS.
  • STA3 receives the CTS, and STA3 reads the RA field of the CTS and finds that it is not the receiving address, and then determines whether to update its own NAV according to the duration of the CTS.
  • STA4 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling. If the BSS Color of the CTS is not the identification information of the own BSS, the STA4 considers that the CTS is a frame of the OBSS. STA4 acquires spatial multiplexing parameters in the RA and prepares for spatial multiplexing.
  • the process of receiving the CTS by the STA5 is the same as the process of receiving the CTS by the STA3.
  • STA1 and AP1 perform uplink transmission, and use RTS/CTS to protect the channel.
  • STA1 sends an RTS to AP1 to reserve a channel, and the receiving address of the RTS is BSSID1a.
  • AP1 receives the RTS and knows the RTS through the sending address of the RTS.
  • the sending site is STA1.
  • the indication information is added to the MAC signaling, indicating that the CTS carries the BSS identification information.
  • AP1 copies the receiving address of the RTS to the RA domain of the CTS, that is, the BSSID1a of the BSS1, or directly writes the BSSID1a of the AP1 into the RA domain of the CTS.
  • STA1 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the CTS MAC signaling has the above indication information.
  • the receiving address of the CTS is the BSSID1a of the BSS1, and the CTS is received after the short interframe interval after the RTS is sent by itself.
  • the STA1 considers that this is the CTS of the RTS sent by itself. Get transmission opportunities.
  • STA 2 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the above signaling information is included in the MAC signaling of the CTS, and the receiving address of the CTS is the BSSID1a of the BSS1.
  • the BSSID1a is one of the BSS identification information sets (BSSID1a, BSSID1b, BSSID1c) of the basic service set BSS1 of the STA 2, that is, the BSSID matches, and the STA2 considers that the radio frame is a frame within the BSS.
  • STA2 does not send an RTS before receiving the CTS, and STA2 determines whether to update its own NAV according to the duration of the CTS.
  • STA 3 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • STA3 reads the RA field of the CTS as BSSID1a and finds that it is not the receiving address, it determines whether to update its own NAV according to the duration of the CTS.
  • STA4 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the above-mentioned indication information is included in the MAC signaling of the CTS. If the receiving address of the CTS is the BSSID1a of the BSS1 and does not match the BSS identification information set (BSSID2a, BSSID2b) of the BTS, the STA4 considers that the CTS is a frame of the OBSS. After determining the OBSS frame, STA4 is ready to perform spatial multiplexing operation.
  • the process of receiving the CTS by the STA5 is the same as the process of receiving the CTS by the STA3.
  • AP1 and STA 1 perform downlink transmission, and use RTS/CTS to protect the channel.
  • AP1 sends an RTS to STA1, and the sending address of the RTS is BSSID1a.
  • STA1 receives the RTS and knows that the sending site of the RTS is AP1 through the sending address of the RTS.
  • the STA1 adds indication information to the MAC signaling, indicating that the CTS carries the BSS identification information.
  • STA1 copies the transmission address of the RTS to the RA domain of the CTS, that is, BSSID1a, or directly writes the BSSID1a of AP1 into the RA domain of the CTS.
  • AP1 receives the CTS, and the receiving address BSSID1a of the CTS is a BSS identification information in the BSS identification information set of the AP1.
  • the AP1 considers that this is a CTS in response to the RTS that it sends, and successfully obtains the transmission opportunity.
  • STA 2 receives the CTS, and the CTS has the above-mentioned indication information in the MAC signaling.
  • the receiving address of the CTS is BSSID1a, which matches the BSS identification information set of STA2, and STA2 considers that the CTS is a frame in the BSS, and STA2 is If the RTS is not sent before the CTS is received, STA2 determines whether to update its own NAV according to the continuity of the CTS.
  • STA 3 receives the CTS, and STA3 reads that the receiving address of the CTS is BSSID1a, and finds that it is not the receiving address, and determines whether to update its own NAV according to the duration of the CTS.
  • STA4 receives the CTS.
  • the above-mentioned indication information is included in the MAC signaling of the CTS. If the receiving address of the CTS is the BSSID1a of the BSS1 and does not match the BSS identification information set (BSSID2a, BSSID2b) of the BTS, the STA4 considers that the CTS is a frame of the OBSS. After determining the OBSS frame, STA4 is ready to perform spatial multiplexing operation.
  • the process of receiving the CTS by the STA5 is the same as the process of receiving the CTS by the STA3.
  • STA 1 performs uplink transmission with AP1 and uses RTS/CTS to protect the channel.
  • STA1 sends an RTS to AP1 to reserve a channel.
  • the receiving address of the RTS is BSSID1a.
  • AP 1 receives the RTS, and knows that the sending station of the RTS is STA1 through the sending address of the RTS.
  • the indication information is added to the MAC signaling, indicating that the CTS carries the BSS identification information.
  • AP1 writes a specific BSSID in the BSS identification information set (BSSID1a, BSSID1b, BSSID1c), in this example, the specific BSSID is the RAS of the CTS.
  • the stations associated with BSSID1a, BSSID1b, and BSSID1c all consider that the radio frame whose reception address is BSSID1a is the BSS radio frame.
  • STA1 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the above-mentioned indication information is included in the MAC signaling of the CTS.
  • the receiving address BSSID1a of the CTS is a specific BSSID of the BSS identification information set, and the CTS is received after the short inter-frame interval after the RTS is sent by itself, and the STA1 considers that this is a response to the self-issued message.
  • RTS CTS successfully acquired transmission opportunities.
  • STA 2 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the above-mentioned indication information is included in the MAC signaling of the CTS, and the STA2 obtains the receiving address BSSID1a of the CTS as the specific BSSID of the BSS identification information set, and the STA2 considers that the radio frame is the frame in the BSS.
  • STA2 does not send an RTS before receiving the CTS, and STA2 determines whether to update its own NAV according to the duration of the CTS.
  • STA3 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • STA3 reads the RA field of the CTS as BSSID1a and finds that it is not the receiving address, it determines whether to update its own NAV according to the duration of the CTS.
  • STA4 receives the radio frame, and learns that the radio frame is CTS from the frame type information in the MAC signaling of the radio frame.
  • the above-mentioned indication information is included in the MAC signaling of the CTS.
  • the receiving address BSSID1a of the CTS is the specific BSSID of the BSS identification information set, and the address does not match the specific BSSID of the basic service set BSS2 of the STA4, that is, the BSSID2a, and the STA4 considers that the CTS is the OBSS. Frame. After determining the OBSS frame, STA4 is ready to perform spatial multiplexing operation.
  • the specific BSSID may also be BSSID_A, where the (48-n) MSB bit of BSSID_A is the (48-n) MSB bit of the reference BSSID, and the (n) bit LSB is 0.
  • n is carried in the beacon, and the BSS in the multiple BSSID set is at most 2 ⁇ n.
  • the specific BSSID may also be a plurality of other MAC addresses that are jointly identified by the access points corresponding to the multiple BSS identification information sets. The usage of these specific BSSIDs is the same as that of Embodiment 9, and will not be described here.
  • the process of receiving the CTS by the STA5 is the same as the process of receiving the CTS by the STA3.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the radio frame carrying the BSS identification information of the basic service set BSS of the sending station, and carrying the indication information in the radio frame, where the indication information is used to indicate whether the radio frame carries the BSS identification information, where the BSS
  • the identification information is BSS color or BSS identity information BSSID;
  • the sending station sends a radio frame.
  • the storage medium is further arranged to store program code for performing the following steps of the above-described embodiments:
  • the station receives the radio frame
  • the radio frame carries the BSS identification information
  • the BSS identification information is obtained, where the BSS identification information is a BSS color identification information BSS color or a BSS identity information BSSID of a sending station of the radio frame.
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor performs the method steps of the foregoing embodiments according to the stored program code in the storage medium.
  • the embodiment of the present invention further provides a computer storage medium, the computer storage medium comprising a set of instructions, when the instruction is executed, causing at least one processor to perform the data transmission method shown in FIG. Or, the method of data transmission shown in FIG. 2 above is performed.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the sending station sends a radio frame, where the radio frame carries the BSS identification information of the BSS where the sending station is located, and the radio frame further carries indication information, where the indication information is used to indicate whether the radio frame is The BSS identification information is carried, wherein the BSS identification information is a BSS color or a BSSID, and spatial multiplexing transmission is implemented.

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

Abstract

La présente invention concerne un procédé de transmission de données, un dispositif et un support de stockage informatique associés. Le procédé comprend les étapes suivantes : une station de transmission transmet une trame sans fil, la trame sans fil contenant des informations d'identification de BSS d'un ensemble de services de base (BSS) et indiquant un emplacement de la station de transmission ; la trame sans fil contient également des informations d'indication, les informations d'indication étant utilisées pour indiquer si la trame sans fil contient des informations d'identification de BBS ; et les informations d'identification de BSS étant les informations d'identification de couleurs de BSS (couleurs de BSS) ou les informations d'identité de BSS (ID de BSS).
PCT/CN2016/111553 2016-01-06 2016-12-22 Procédé de transmission de données, dispositif et support de stockage informatique associés Ceased WO2017118297A1 (fr)

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CN201610235394 2016-04-15
CN201610235394.8 2016-04-15
CN201610506655.5 2016-06-30
CN201610506655.5A CN106954273B (zh) 2016-01-06 2016-06-30 数据传输的方法及装置

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