WO2012034447A1 - Procédé pour une acquisition et une identification de groupes multi-utilisateurs, point d'accès et station - Google Patents

Procédé pour une acquisition et une identification de groupes multi-utilisateurs, point d'accès et station Download PDF

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Publication number
WO2012034447A1
WO2012034447A1 PCT/CN2011/076990 CN2011076990W WO2012034447A1 WO 2012034447 A1 WO2012034447 A1 WO 2012034447A1 CN 2011076990 W CN2011076990 W CN 2011076990W WO 2012034447 A1 WO2012034447 A1 WO 2012034447A1
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Prior art keywords
sta
mimo
packet
information
group
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PCT/CN2011/076990
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English (en)
Chinese (zh)
Inventor
田开波
李峰
吕开颖
李楠
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中兴通讯股份有限公司
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Publication of WO2012034447A1 publication Critical patent/WO2012034447A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/186—Processing of subscriber group data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems

Definitions

  • the present invention relates to the field of communications, and in particular to a MU-MIMO (multi-user multiple input multiple output) multi-user packet identification, acquisition method, and connection Entry point and site.
  • WLANs are wireless network technologies that interconnect computer devices to form a network system that can communicate with each other and share resources.
  • the essence of WLAN is that the communication cable is no longer used to connect the computer to the network, but is connected wirelessly, so that the construction of the network and the movement of the terminal are more flexible.
  • IEEE802.il is one of the mainstream technologies for wireless LANs. This protocol mainly specifies physical (PHY) layer and media access control (MAC) layer specifications.
  • the access point is based on one channel or multiple factors such as channel state information, data traffic, and data service type of each station (Station, STA).
  • Group number each MU-MIMO group is identified by only one GroupID, but one GroupID can indicate different MU-MIMO packets. Since the length of the GroupID indication field specified by the current protocol is 6 bits, it can provide up to 64 group numbers.
  • a primary object of the present invention is to provide a multi-user packet identification, an acquisition method, an access point, and a station, to solve the above-mentioned related art MU-MIMO, which cannot provide a packet combination of more different STAs, and also The problem of different MU-MIMO packets with the same group number cannot be clearly distinguished.
  • a multi-user packet identification method including: an access point transmitting packet identification information to a station STA, the packet identification information being used to uniquely identify one MU-MIMO packet of the same MU-MIMO group
  • the same MU-MIMO group includes one or more MU-MIMO packets.
  • the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs.
  • the step of the access point sending the packet identification information to the STA is: the access point sends a sending reservation RTS frame to the STA, where the data flow in the RTS frame indicates that the N STS domain carries the relative location information or the index number information of the STA,
  • the media access control of the RTS frame The receive address field in the MAC frame header carries the identifier of the STA.
  • the identifier of the STA is the MAC address of the STA.
  • the STA identifying the MU-MIMO packet is an STA having data transmission in the MU-MIMO packet.
  • the step of the access point sending the transmission reservation RTS frame to the STA comprises: the access point setting the data stream bit of the STA in the N STS domain of the RTS frame to 1 to indicate that the STA is the identifier MU-MIMO Packetized STA; sends an RTS frame to the STA.
  • the step of the access point sending the transmission reservation RTS frame to the STA comprises: the access point setting all the data stream bits of the other STAs except the STAs identifying the MU-MIMO packet in the N STS domain of the RTS frame 0, sends an RTS frame to the STA.
  • the step of the access point sending the transmission reservation RTS frame to the STA includes: the access point in the N STS domain of the RTS frame, except for the STA that identifies the MU-MIMO packet, the data stream bits of other STAs are in accordance with each STA The actual data stream is set to send an RTS frame to the STA.
  • the group identification information further includes group identifier GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.
  • a method for acquiring a multi-user packet including: receiving, by a station STA, packet identification information sent by an access point, where the packet identification information is used to uniquely identify a MU of the same MU-MIMO group.
  • the same MU-MIMO group includes one or more MU-MIMO packets; the information of one MU-MIMO packet of the same MU-MIMO group is obtained according to the packet identification information.
  • the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs.
  • the step of the station STA receiving the packet identification information sent by the access point comprises: receiving, by the STA, a transmission reservation RTS frame sent by the access point, where the data flow in the RTS frame indicates that the N STS domain carries the STA that identifies the MU-MIMO packet.
  • the RTS frame further includes: group identity GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.
  • the step of the station STA acquiring the information of one MU-MIMO packet of the same MU-MIMO group according to the packet identification information comprises: the STA according to the GroupID information in the RTS frame, the relative location information of the STA that identifies the MU-MIMO packet Or the index number information, the identifier of the STA that identifies the MU-MIMO packet, and the information of one MU-MIMO packet of the same MU-MIMO group.
  • the STA acquires the same MU-MIMO group according to the GroupID information in the RTS frame, the relative location information of the STA that identifies the MU-MIMO packet or the index number information, and the identifier of the STA that identifies the MU-MIMO packet.
  • the step of information of one MU-MIMO packet includes: the STA searches for the location indicated by the relative location information or the index number information in the MU-MIMO group indicated by the GroupID information, and the identifier is consistent with the STA identifier in the RTS frame.
  • the MU-MIMO packet to which the STA belongs acquires information of the MU-MIMO packet.
  • the identifier of the STA is the MAC address of the STA.
  • an access point including: a notification module, configured to send, to a station STA, packet identification information, where the packet identification information is used to uniquely identify a MU of the same MU-MIMO group.
  • MIMO packets the same MU-MIMO group includes one or more MU-MIMO packets.
  • the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs.
  • the notification module includes: an RTS frame notification module, configured to send a transmission reservation RTS frame to the STA, where the data flow in the RTS frame indicates that the N STS domain carries relative location information or index number information of the STA, and media access control of the RTS frame
  • the receiving address field in the MAC frame header carries the identifier of the STA.
  • the identifier of the STA is the MAC address of the STA.
  • the same MU-MIMO group includes a plurality of MU-MIMO packets
  • at least one of the plurality of MU-MIMO packets has a relative position different from that of the other packets except the packet. Relative position.
  • the group identification information further includes group identifier GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.
  • a station STA is further provided, including: a receiving module, configured to receive packet identification information sent by an access point, where the group identification information is used to uniquely identify a MU of the same MU-MIMO group a MIMO packet, the same MU-MIMO group comprising one or more of said MU-MIMO packets; an acquisition module arranged to acquire information of one MU-MIMO packet of the same MU-MIMO group based on the packet identification information.
  • the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs.
  • the receiving module includes: an RTS frame receiving module, configured to receive a sending reservation RTS frame sent by the access point, where the data stream in the RTS frame indicates that the N STS domain carries relative location information of the STA that identifies the MU-MIMO packet Or index number information, media access control MAC frame header of the RTS frame Receive address i or an identifier carrying a STA that identifies the MU-MIMO packet.
  • the RTS frame further includes: group identity GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.
  • the obtaining module comprises: an RTS frame acquiring module, configured to acquire according to GroupID information in the RTS frame, relative location information or index number information of the STA that identifies the MU-MIMO packet, and identifier of the STA that identifies the MU-MIMO packet. Information of one MU-MIMO packet of the same MU-MIMO group.
  • the RTS frame obtaining module is configured to search, in the MU-MIMO group indicated by the GroupID information, the MU to which the STA whose identifier is consistent with the STA identifier in the RTS frame is located at the location indicated by the relative location information or the index number information.
  • - MIMO packet obtaining information of the MU-MIMO packet.
  • the identifier of the STA is the MAC address of the STA.
  • the access point is used to send packet identification information carrying the MU-MIMO packet uniquely identifying the same MU-MIMO group to the station, and the specific MU-MIMO packet is identified by the information, and the packet identification information can be Notifying the MU-MIMO packet that the station is to transmit data, solving the problem in the related art that the different MU-MIMO packets having the same group number cannot be clearly distinguished; meanwhile, since the packet identification information can uniquely identify one MU-MIMO packet, The ingress point can notify the station of the group identification information, and the station can obtain the information of the MU-MIMO packet of the data to be transmitted, so that the STA does not need to be limited to the number of packets limited by the limited bit when the packet is grouped, thereby solving the problem that the related technology cannot provide more.
  • FIG. 1 is a flow chart showing the steps of a multi-user packet identification method according to a first embodiment of the present invention
  • FIG. 2 is a flow chart showing the steps of a multi-user packet acquisition method according to a second embodiment of the present invention
  • 3 is a flow chart showing the steps of a multi-user group identification method according to Embodiment 3 of the present invention
  • 4 is a flow chart showing the steps of a multi-user packet acquisition method according to Embodiment 4 of the present invention
  • FIG. 2 is a flow chart showing the steps of a multi-user packet acquisition method according to a second embodiment of the present invention
  • 3 is a flow chart showing the steps of a multi-user group identification method according to Embodiment 3 of the present invention
  • 4 is a flow chart showing the steps of a multi-user packet acquisition method according to Embodiment 4 of the present invention
  • Step S102 The access point sends packet identification information to the station.
  • the packet identification information is used to uniquely identify one MU-MIMO packet in the same MU-MIMO group, and may be an identifier of the STA that uniquely identifies one MU-MIMO packet (such as the MAC address of the STA) and the STA is in the
  • the relative location information or the index number information in the packet may also be an index number of the MU-MIMO packet in the MU-MIMO group to which the MU-MIMO packet belongs, and the skilled person may also use other packet identification information manners, and the unique identifier may be the same.
  • the station can obtain the related information of the MU-MIMO packet of the data to be transmitted by using the packet identification information sent by the access point.
  • the packet identification information is preferably an RTS frame. Of course, it may also be other information, such as: carrying the packet identification information and the like in the information that directly transmits the data to the notification site.
  • RTS frame sent by the access point to the station or the information about the data sent by the station is not clearly distinguishable from different MU-MIMO packets having the same group number, and subject to the length of the GroupID indication field, It is not possible to provide more combinations of different STAs.
  • the access point is sent to the station to carry the unique identifier in the same MU-MIMO group.
  • the group identification information of the MU-MIMO packet by which the station can be notified that the data is to be transmitted.
  • MU-MIMO grouping enabling stations to clearly distinguish between different MU-MIMOs with the same group number
  • the packet identification information can uniquely identify one MU-MIMO packet, as long as the access point can notify the station of the packet identification information, the station can acquire the information of the MU-MIMO packet of the data to be transmitted, so that the STA is in the grouping time. , does not have to be limited to the number of packets limited by limited bits.
  • FIG. 2 a flow chart of steps of a multi-user packet acquisition method according to Embodiment 2 of the present invention is shown.
  • the station receives the packet identification information sent by the access point, and parses and obtains the information of the specific MU-MIMO packet.
  • the multi-user packet obtaining method of this embodiment includes the following steps: Step S202: The STA receives the packet identification information sent by the access point; the packet identification information is sent by the access point, and is used to uniquely identify one MU of the same MU-MIMO group. - MIMO packets, the same MU-MIMO group may include one or more MU-MIMO packets.
  • Step S204 The STA acquires information of one MU-MIMO packet of the same MU-MIMO group according to the packet identification information.
  • the station determines the MU-MIMO packet of the data to be transmitted in the MU-MIMO group according to the packet identification information.
  • Step S302 Assign a group identifier GroupID of a MU-MIMO group to one or more MUs. - MIMO packet.
  • the number of MU-MIMO packets is more than the number of GroupIDs.
  • one GroupID identifies multiple MU-MIMO packets, but one MU-MIMO packet belongs to only one MU-MIMO group identified by one GroupID.
  • Step S304 Uniquely identify each MU-MIMO packet in the plurality of MU-MIMO packets under the same MU-MIMO group by using the packet identification information.
  • one MU-MIMO packet is identified by using the relative location information of one STA in the group and the MAC address of the STA.
  • each MU-MIMO packet can use relative location information and identifiers within the group with one of the one or more STAs that can identify the MU-MIMO packet within the group (such as a MAC address) to uniquely identify the MU-MIMO packet.
  • the STA identifying the MU-MIMO packet means that it appears here
  • the relative positions in the MU-MIMO packets are different from the relative positions in other MU-MIMO packets that appear under the same GroupID.
  • the index of the STA in the group that can identify a MU-MIMO packet can also be used to identify the MU-MIMO packet to which it belongs.
  • the identity of the STA in its MU-MIMO packet can be determined quickly and easily by the relative location information or index number information of a STA in the group. It should be noted that if a MU-MIMO packet has multiple STAs that can identify the MU-MIMO, any combination of multiple STAs may also be used to identify the MU-MIMO packet.
  • Step S306 The access point sends the packet identification information to the station.
  • the N STS field (data flow indication field) in the RTS (Ready To Send) frame is used to indicate the relative position of the STA identifying the MU-MIMO packet within the group.
  • the bits in the N STS field of the RTS frame used to indicate the number of data streams of the STA identifying the MU-MIMO packet are all set to 1 in order to distinguish the STAs identifying the MU-MIMO packet.
  • the bits of the number of data streams used to indicate the STA of the non-identifying MU-MIMO packet in the N STS field of the RTS frame are all set to zero.
  • the bits of the N STS field of the RTS frame used to indicate the number of data streams of the STAs that do not identify the MU-MIMO packet may also be set according to the actual data stream of each STA.
  • the MAC address filled in the receiving address field in the MAC frame header of the RTS frame is the MAC address of the STA identifying the MU-MIMO packet.
  • the receiving address i or the filled MAC address in the MAC frame header of the RTS frame can identify the MU-MIMO packet and the current MU-MIMO transmission
  • There is a MAC address of any STA that has data transmission in order to achieve fast and efficient data transmission. If only one STA in the group can identify the MU-MIMO packet, the MAC address filled in the receiving address field in the MAC frame header of the RTS frame is the MAC address of the STA, regardless of whether the STA has data transmission this time. The STA can be quickly found by the MAC address of the STA that can be identified.
  • the specific MU-MIMO packet of this transmission can be clearly indicated by using the GroupID field in the RTS frame, the N STS field, and the address i or in the MAC frame header of the RTS frame.
  • those skilled in the art can also set the access point to carry the packet identification information by using other suitable data frames or messages.
  • the packet identification information is an index number of a different MU-MIMO packet under the same GroupID (for example, the first packet index number is 1, and the second packet index number is 2, ...
  • the Nth packet index number is N
  • additional signaling is required to inform the site differently.
  • the index number information of the MU-MIMO packet can also fully utilize the existing signaling implementation, and can be appropriately set by a person skilled in the art as needed.
  • FIG. 4 a flow chart of steps of a multi-user packet acquisition method according to Embodiment 4 of the present invention is shown.
  • the embodiment corresponds to the embodiment 3.
  • the station receives the RTS frame sent by the access point, and parses the information of the MU-MIMO packet that is to be transmitted in the RTS frame.
  • the multi-user packet obtaining method of this embodiment includes the following steps: Step S402:
  • the STA receives an RTS frame sent by the access point;
  • the N STS field of the RTS frame carries relative location information or index number information of the STA that identifies the MU-MIMO packet.
  • the receiving address field in the MAC frame header of the RTS frame carries the identifier of the STA that identifies the MU-MIMO packet, and the RTS frame also carries the GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.
  • the identifier of the STA is the MAC address of the STA.
  • Step 404 The STA acquires information of one MU-MIMO packet of the same MU-MIMO group according to the RTS frame.
  • the STA acquires the same MU-MIMO group according to the GroupID information in the RTS frame, the relative location information of the STA that identifies the MU-MIMO packet, or the index number information, and the identifier of the STA that identifies the MU-MIMO packet.
  • Information about a MU-MIMO packet Specifically, the STA searches for the MU-MIMO packet to which the STA corresponding to the STA identifier in the RTS frame belongs to the MU-MIMO group indicated by the GroupID information, and obtains the location indicated by the relative location information or the index number information.
  • the information of the MU-MIMO packet Referring to FIG. 5, there is shown a padding diagram of an N STS field of an RTS frame according to Embodiment 5 of the present invention.
  • there are one AP and eight STAs in the network and eight STAs are called A, B, C, D, E, F, G, and H, and each STA uses its MAC address as the identifier.
  • the AP performs possible MU-MIMO packets according to the channel state information of 8 STAs, and has 16 groups: (ABCD), (ABCH), (ABGD), (ABGH), (AFCD), (AFCH),
  • AFGD AFGH
  • EBCD EBCH
  • EBGD EBGH
  • EFCD EFCD
  • each group of MU-MIMO packets is assigned a GroupID. Since there are only two GroupIDs, each GroupID may need to indicate multiple packets. In order to effectively utilize the packet information without confusion, the relatives of the STAs in each of the above packets are adjusted. In the case of location, each MU-MIMO packet under the same GroupID can be uniquely identified by the relative location information of one or more STAs in the group.
  • Those skilled in the art can perform the grouping or adjusting the STA order in the packet under the principle, and can be implemented by any prior art method (such as exhaustive or traversal algorithm, etc.). In this embodiment, a specific grouping is implemented as follows:
  • ABSCD (ABCD), (BACH), (GFAD), (FGHA), (DEBC), (HCBE), (EDBG), (GHEB);
  • the three groups in (BACH), (GFAD), (FGHA) appear, but the relative positions in the three groups are not the first one in the group; the same B in the group occupies the first in the group
  • Two relative positions, B appears in 5 of the remaining 7 packets of GroupID l ((BACH), (DEBC), (HCBE), (EDBG), (GHEB)), but in these 5 groups
  • the relative position is not the second in the group.
  • C and D in this group cannot be used as STAs to identify this group.
  • the eighth packet (GHFE) of GroupID 2, which can be used to identify the STA of this packet, has G and E.
  • the AP notifies the STA of the group information, and after receiving the group information, the STA can obtain detailed group information under the group ID.
  • the bit is set to 001, and the 3 bits used to indicate the number of STAs of the STA in the second location in the MU-MIMO packet are set to 111 (to indicate that it is the STA that identifies the MU-MIMO packet, and of course, STA A identifies the MU-MIMO packet, and sets the number of data streams of the STA at the first location to be 111), which is used to indicate the number of STAs of the STA at the third location in the MU-MIMO packet.
  • the bit is set to 000, which is used to indicate that the 3 bits of the number of STAs in the fourth position in the MU-MIMO packet are set to 001, as shown in FIG.
  • the STA that identifies the MU-MIMO packet for the transmission is the STA at the second location in the group, and the number of STA data streams in the first location and the fourth location in the group are 1.
  • the number of data streams of the STA in the third position is 0, that is, the transmission does not include the data of the STA in the third position; the receiving address field in the MAC frame header of the RTS frame fills in the MAC address of the STA B. .
  • A can analyze the GroupID field, the N STS field, and the receiving address field in the MAC frame header to obtain useful information as follows:
  • There are 4 MU-MIMO packets that is, 4 MU-MIMO packets including A): (ABCD), (BACH), (GFAD), (FGHA), where there are 2 packets containing B: (ABCD ), ( BACH ), in the 2 in the group B is in the second position
  • the set MU-MIMO packet is (ABCD), so A knows that the MU-MIMO packet of the MU-MIMO transmission is (ABCD), and A is in the first position in the packet, and then according to N STS
  • B After receiving the RTS frame, B can analyze the GroupID field, the N STS field, and the receiving address field in the MAC frame header to obtain useful information as follows:
  • C can analyze the GroupID field, the N STS field, and the receiving address field in the MAC frame header to obtain useful information as follows:
  • There are 4 MU-MIMO packets ie 4 MU-MIMO packets including C): (ABCD), (BACH), (DEBC), (HCBE), where there are 4 packets containing B: (ABCD ), (BACH), (DEBC), (HCBE), the MU-MIMO packet in which the B is in the second position in the group in the packet is (ABCD), and thus C knows that the MU-MIMO transmission 4
  • Ten pairs of MU-MIMO packets are (ABCD).
  • C is in the third position in this packet, and according
  • the useful information obtained by parsing the GroupID field, the N STS field, and the receiving address field in the MAC frame header is as follows:
  • There are 4 MU-MIMO packets that is, 4 MU-MIMO packets including D): (ABCD), (GFAD), (DEBC), (EDBG), which contains 3 packets of B: (ABCD ), (DEBC), (EDBG), in these three MU-MIMO packets in the group B in the second position in the group is (ABCD), from which D can know that this MU-MIMO transmission 40 pairs of MU - MIMO packet is (ABCD).
  • D is in the fourth position in this group, only ⁇ According to the indication in the
  • the useful information obtained by parsing the GroupID field, the N STS field, and the receiving address field in the MAC frame header is as follows:
  • There are 4 MIMO packets that is, 4 MU-MIMO packets including E): (DEBC), (HCBE), (EDBG), (GHEB), where there are 4 packets containing B: (DEBC), (HCBE), ( EDBG ), ( GHEB ), in which there are no Bs in the second group in the group, so E can determine that this MU-MIMO transmission is not for the MU-MIMO packet in which it is located.
  • the rest of the STAs are treated similarly to E.
  • FIG. 6 there is shown a padding diagram of an N STS field of an RTS frame according to Embodiment 6 of the present invention.
  • the AP performs possible MU-MIMO packets according to the channel state information of 8 STAs, and has 16 groups: (ABCD), (ABCH), (ABGD), (ABGH), (AFCD), (AFCH), (AFGD) ), ( AFGH ), ( EBCD ), ( EBCH ), ( EBGD ), ( EBGH ), ( EFCD ), ( EFCH ), ( EFGD ), ( EFGH ). Note that the STAs in each parenthesis above have not been sequenced. Each group of MU-MIMO packets is assigned a GroupID.
  • each GroupID may need to indicate multiple packets.
  • the relatives of the STAs in each of the above packets are adjusted.
  • each MU-MIMO packet under the same GroupID can be uniquely identified by the relative location information of one or more STAs in the group.
  • a specific grouping is implemented as follows:
  • GroupID 1 : (ABDC), (BACH), (GFAD), (FGHA), (DEBC), (HCBE), (EDBG), (GHEB);
  • the four STAs in the group have not changed, but the order of STAs within the group has changed. Affected by this, the changes are:
  • the STAs of the packets (GFAD) are D and E; the remaining packets are unaffected, and the packet ordering still satisfies the principle of the above-mentioned packet or adjusting the STA order within the packet. It can be seen that in the case of the same grouping, the relative positions of the STAs in each group are reasonably arranged, and different allocation results can be obtained, but the effect is the same.
  • the AP notifies the STA of the group information, and after receiving the group information, the STA can obtain detailed group information under the group ID.
  • the number of bits is set to 111 (to indicate that it is the STA that identifies the MU-MIMO packet, and any other STA that can identify the packet, and the three bits of the number of data streams at the corresponding location are set to 111),
  • the bits indicating the number of data streams of the STAs at the remaining positions in the MU-MIMO packet are all set to 0, as shown in FIG.
  • the STA that identifies the MU-MIMO packet for this transmission is the STA at the second location in the group; the receiving address field in the MAC frame header of the jtb RTS frame fills in the MAC address of STA B.
  • the useful information obtained by parsing the GroupID field, the N STS field, and the receiving address field in the MAC frame header is as follows:
  • the MU-MIMO packet in the second location is (ABDC), and thus A knows that the 40-pair MU-MIMO packet of the MU-MIMO transmission is (ABDC).
  • B After receiving the RTS frame, B can analyze the GroupID field, the N STS field, and the receiving address field in the MAC frame header to obtain useful information as follows:
  • the MU-MIMO packet of the first location is (ABDC), and thus B knows that the MU-MIMO packet of the 40-pair MU-MIMO transmission is (ABDC).
  • C can analyze the GroupID field, the N STS field, and the receiving address field in the MAC frame header to obtain useful information as follows:
  • the MU-MIMO packets in the second position in the group B in the group are (ABDC), and thus C knows that the MU-MIMO packet of the MU-MIMO transmission of 40 pairs is (ABDC).
  • the useful information obtained by parsing the GroupID field, the N STS field, and the receiving address field in the MAC frame header is as follows:
  • the useful information obtained by parsing the GroupID field, the N STS field, and the receiving address field in the MAC frame header is as follows:
  • FIG. 7 there is shown a padding diagram of an N STS field of an RTS frame according to Embodiment 7 of the present invention.
  • there are one AP and eight STAs in the network and eight STAs are called A, B, C, D, E, F, G, and H, and each STA uses its MAC address as the identifier.
  • the AP performs possible MU-MIMO packets according to the channel state information of 8 STAs, and has 16 groups: (ABCD), (ABCH), (ABGD), (ABGH), (AFCD), (AFCH), (AFGD) ), ( AFGH ), ( EBCD ), ( EBCH ), ( EBGD ), ( EBGH ), ( EFCD ), ( EFCH ), ( EFGD ), ( EFGH ).
  • the STAs in each parenthesis above have not been sequenced.
  • Each group of MU-MIMO packets is assigned a GroupID. Since there are only two GroupIDs, each GroupID may need to indicate multiple packets.
  • each MU-MIMO packet under the same GroupID can be uniquely identified by the relative location information of one or more STAs in the group.
  • a specific grouping is implemented as follows:
  • GroupID 1 : (BACH), (GFAD), (FGHA), (DEBC), (HCBE), (EDBG), (GHEB);
  • the change is: In the embodiment shown in FIG.
  • the AP notifies the STA of the group information, and after receiving the group information, the STA can obtain detailed group information under the group ID.
  • the bit is set to 001, and the 3 bits used to indicate the number of STAs of the STA in the second position in the MU-MIMO packet are set to 001, which is used to indicate the data of the STA in the third position in the MU-MIMO packet.
  • the 3 bits of the number of streams are set to 001, which is used to indicate that the 3 bits of the number of STAs of the STA in the fourth position in the MU-MIMO packet are set to 111 (to indicate that it is the STA that identifies the MU-MIMO packet, Any other STA that can identify the packet can also be used, and the 3 bits of the number of data streams at its corresponding location are set to 111), as shown in FIG.
  • identifying this The STA of the MU-MIMO packet for the secondary transmission is the STA at the fourth position in the group, and the number of STA data streams in the remaining positions in the group is 1; the receiving address field in the MAC frame header of the RTS frame is filled in the STA H's MAC address.
  • each STA After receiving the RTS frame, each STA is processed as follows: After receiving the RTS frame, A can analyze the GroupID field, the N STS field, and the receiving address field in the MAC frame header to obtain useful information as follows:
  • the MU-MIMO packet in the fourth position in the group is (BACH), so that A knows that the MU-MIMO packet of the 40-pair MU-MIMO transmission is (BACH), and A is in the second position in the packet.
  • the indication in the N STS domain the number of data streams of
  • B After receiving the RTS frame, B can analyze the GroupID field, the N STS field, and the receiving address field in the MAC frame header to obtain useful information as follows:
  • the first position in the packet is 1, according to the indication in the N STS field
  • C can analyze the GroupID field, the N STS field, and the receiving address field in the MAC frame header to obtain useful information as follows:
  • the MU-MIMO packet at the four locations is (BACH), and thus C knows that the MU-MIMO packet of the 40-pair MU-MIMO transmission is (BACH).
  • the H can obtain useful information by parsing the GroupID field, the N STS field, and the receiving address field in the MAC frame header.
  • the packet is (BACH), and thus H knows that the MU-MIMO packet of the 40-pair MU-MIMO transmission is (BACH).
  • the useful information obtained by parsing the GroupID field, the N STS field, and the receiving address field in the MAC frame header is as follows:
  • the information at the fourth position in the packet determines that the 40-pair packet of the MU-M
  • a block diagram of an access point according to Embodiment 8 of the present invention including: a notification module 802, configured to send packet identification information to a station, where the group identification information is used to uniquely identify the same MU.
  • the packet identification information includes an identifier of a station STA capable of uniquely identifying the MU-MIMO packet in the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs.
  • the notification module 802 includes: an RTS frame notification module 8022, configured to send to the station
  • the RTS frame where the N STS field in the RTS frame carries the relative location information or the index number information of the STA, and the receiving address field in the MAC frame header of the RTS frame carries the identifier of the STA.
  • the identifier of the STA is the MAC address of the STA.
  • the STA identifying the MU-MIMO packet is an STA having data transmission in the MU-MIMO packet.
  • the RTS frame notification module 8022 is configured to set all the bits of the data stream of one STA in the N STS domain of the RTS frame to 1 to indicate that the STA is an STA that identifies the MU-MIMO packet, and send an RTS frame to the station. .
  • the RTS frame notification module 8022 is configured to set all the bits of the data stream of the other STAs other than the STAs identifying the MU-MIMO packet in the N STS domain of the RTS frame to send the RTS frame to the point. .
  • the RTS frame notification module 8022 is configured to set the bit of the data stream of the other STAs according to the actual data stream of each STA, except for the STA that identifies the MU-MIMO packet in the N STS domain of the RTS frame, to the site. Send an RTS frame.
  • the group identification information further includes group identifier GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.
  • a receiving module 902 configured to receive packet identification information sent by an access point, where the group identification information is used to uniquely identify the same MU.
  • the packet identification information includes an identifier of one STA in the MU-MIMO packet capable of uniquely identifying the MU-MIMO packet, and relative location information or index number information of the STA in the MU-MIMO packet to which the STA belongs.
  • the receiving module 902 includes: an RTS frame receiving module 9022, configured to receive an RTS frame sent by the access point, where the N STS field in the RTS frame carries relative location information or index number information of the STA that identifies the MU-MIMO packet.
  • the receiving address field in the MAC frame header of the RTS frame carries the identifier of the STA that identifies the MU-MIMO packet.
  • the identifier of the STA is the MAC address of the STA.
  • the RTS frame further includes GroupID information of the MU-MIMO group to which the MU-MIMO packet belongs.
  • the obtaining module 904 includes an RTS frame obtaining module 9042, configured to set, according to GroupID information in the RTS frame, relative location information or index number information of the STA that identifies the MU-MIMO packet, and identifier of the STA that identifies the MU-MIMO packet. Obtain information of one MU-MIMO packet of the same MU-MIMO group.
  • the RTS frame obtaining module 9042 is configured to: in the MU-MIMO group indicated by the GroupID information, look up the location indicated by the relative location information or the index number information, and the STA whose identifier is consistent with the STA identifier in the RTS frame belongs to The MU-MIMO packet acquires information of the MU-MIMO packet.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed 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 are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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

Abstract

L'invention concerne un procédé pour une acquisition et une identification de groupes (GroupID) multi-utilisateurs, un point d'accès (AP) et une station (STA). Le procédé pour le GroupID MU comprend : l'AP transmettant à la STA un élément d'informations du GroupID ; des informations du GroupID étant utilisées dans le marquage spécifiquement d'un sous-groupe MU-MIMO d'un groupe MU-MIMO ; un groupe MU-MIMO comprenant un ou une pluralité de sous-groupes MU-MIMO. L'invention permet une distinction nette entre différents sous-groupes MU-MIMO ayant le même GroupID, et prévoit le groupage d'autres sous-groupes de STA différents.
PCT/CN2011/076990 2010-09-16 2011-07-08 Procédé pour une acquisition et une identification de groupes multi-utilisateurs, point d'accès et station WO2012034447A1 (fr)

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CN102664857B (zh) * 2012-05-16 2014-09-10 东南大学 超高速短距离无线接入系统中的有限反馈多用户分组方法
CN104125046B (zh) * 2013-04-28 2017-11-17 华为技术有限公司 一种数据传输方法、装置及系统
CN109245809B (zh) 2013-06-25 2021-08-20 华为技术有限公司 上行多用户数据传输方法及上行多用户输入输出系统
CN106332059A (zh) * 2015-06-15 2017-01-11 中兴通讯股份有限公司 终端通信方法及通信终端
CN115115072A (zh) * 2022-08-24 2022-09-27 中国医学科学院皮肤病医院(中国医学科学院皮肤病研究所) 智能预约管理系统及其预约管理方法

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