WO2012034521A1 - Procédé et dispositif pour un système d'entrées multiples sorties multiples multi-utilisateur pour la transmission de données - Google Patents

Procédé et dispositif pour un système d'entrées multiples sorties multiples multi-utilisateur pour la transmission de données Download PDF

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Publication number
WO2012034521A1
WO2012034521A1 PCT/CN2011/079665 CN2011079665W WO2012034521A1 WO 2012034521 A1 WO2012034521 A1 WO 2012034521A1 CN 2011079665 W CN2011079665 W CN 2011079665W WO 2012034521 A1 WO2012034521 A1 WO 2012034521A1
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user
group
virtual
mimo
identifier
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PCT/CN2011/079665
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English (en)
Chinese (zh)
Inventor
朱胡飞
李斌
罗毅
杨讯
李云波
李靖
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华为技术有限公司
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Priority claimed from CN201010292585.0A external-priority patent/CN102404087B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2012034521A1 publication Critical patent/WO2012034521A1/fr

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a technique for multi-user multiple input multi-output (MU-MIMO) data transmission.
  • MU-MIMO multi-user multiple input multi-output
  • SDMA Space Division Multiple Access
  • MU-MIMO multi-user MIMO
  • Multi-user MIMO groups a plurality of user terminals (station, ie, STAs) into a group, which is called a multi-user MIMO group. Multiple user terminals in the group are spatially multiplexed. Therefore, corresponding instructions are required to indicate multi-user MIMO users. Information related to terminal grouping.
  • the user group Group can also be used to specifically refer to the multi-user MIMO group described above.
  • a MU-MIMO group definition field (Group-definition-field) is used.
  • each group in MU-MIMO mode includes 4 user terminals
  • one MU-MIMO group definition domain signaling is as follows.
  • the Group ID is a bit sequence indicating the user group serial number
  • the AID Associated
  • Identifier such as AID1, AID2, etc.
  • AID1 represents an identifier associated with each user terminal.
  • the AID can be referred to as a user terminal identifier or a user terminal ID.
  • the AID can also be replaced with other information that can identify each STA.
  • one or more of the above-mentioned MU-MIMO group definition domain signaling may be transmitted, and multiple MU-MIMO user groups of different group numbers are defined, and each MU-MIMO user group includes AID1, AID2, AID3, and 4 user terminals identified by AID4.
  • the MU-MIMO group definition domain may be referred to as a group definition domain.
  • the above-mentioned group definition domain signaling is usually sent by an access point (AP) to each STA.
  • AP access point
  • each STA After receiving the above-mentioned group-defined domain signaling, each STA knows the Group ID corresponding to the MU-MIMO group in which the STA identifier is located. In this example, when the STA finds that its AID is one of the above AID1, AID2, AID3, and AID4 indicated by a certain Group ID, it knows that it belongs to the MU-MIMO group defined by the above Group ID.
  • the spatial multiplex stream number indication (Stream Number Indication) signaling is used, as follows.
  • the number of columns of MU - MIMO (denoted as Ns t s - k ),
  • the AP can only use the four STAs included in the group ID, and cannot select STAs from more STAs according to the current channel conditions and data queues to be transmitted. If you try your best to exhaust all kinds of STA combinations, it is too complicated and costly.
  • the embodiment of the invention provides a method for transmitting data of a multi-user MIMO transmission, which can select a terminal corresponding to the group ID from the terminal, and reduce overhead.
  • a method for transmitting data by a multi-user MIMO system includes: Sending a signaling frame, where the signaling frame includes: a user group serial number Group ID; K user terminal identifiers and virtual identifiers;
  • the K user terminal identifiers respectively correspond to K user terminals
  • the virtual identifier indicates a user terminal combination composed of any M terminal users of the K user terminals
  • K is greater than M, and M is the number of user terminals supported by the system; the number of the virtual identifiers is a natural number less than or equal to;
  • a method for transmitting data by multi-user MIMO comprising:
  • the virtual identifier indicates a combination of user terminals composed of any one of the user terminals, and the terminal user in the combination of the STAs indicated by the virtual identifier receives the data; where ⁇ is greater than ⁇ , ⁇
  • the number of user terminals supported by the system; the number of the virtual identifiers is a natural number less than or equal to.
  • a method for transmitting data by multi-user MIMO includes:
  • an embodiment of the present invention further provides an apparatus for implementing the above method.
  • the method provided by the embodiment of the present invention specifies K users by using a group ID, and then selects M user terminals that can be supported by the system among the K users through the virtual identifier, and does not need to exhaust the exhaustion of various STA combinations and Group IDs. , the choice of the user terminal is realized, and the system overhead is reduced.
  • a method for transmitting data by multi-user MIMO is provided in the embodiment of the present invention.
  • An access point (AP) sends a plurality of spatially multiplexed streams to a plurality of STAs included in a multi-user MIMO group, and the plurality of streams are precoded by a precoding matrix and then sent to multiple transmissions.
  • the antenna is transmitted, that is, the symbol vector composed of the symbols of the plurality of streams left by the precoding matrix, and the obtained result is sent to a plurality of transmitting antennas for transmission.
  • the multi-user MIMO system supports M user terminals.
  • MIMO multi-user MIMO
  • a MU-MIMO group-definition-field is used. :3 ⁇ 4, shown below,
  • the signaling frame sent by the AP includes: group ID; K user terminal identifiers AID, which respectively correspond to K users (AID1, AID2... AIDk), where ⁇ is greater than ⁇ ; virtual identifier C (Cl, C2. ...Cn ) where the number of virtual identities can take a natural number less than or equal to.
  • the virtual identifier (virtual ID) may also be referred to as an extended ID, and the virtual identifier is used to indicate any one of the possible combinations of the M STAs among the K STAs.
  • C1, C2... may also be any one of the combinations of K subsets that are included in a subset of all possible combinations of M STAs.
  • the signaling frame sent by the AP includes the group ID; and the AID or data of 8 users respectively, AID1-AID8, which are represented as A, B, C, D, E, F, G, H; In this embodiment, there are 16 virtual IDs. Therefore, in the present embodiment, for the group ID in one data frame, in the current data transmission, the corresponding four users can have 16 options, as follows: In the manner shown in the above figure, multiple multi-user MIMO groups can be defined at the same time. Detailed descriptions are given below for various situations.
  • C1, C2, etc. in the above figure respectively indicate respective combinations, which may be any one of all possible combinations of 4 STAs among 8 STAs.
  • the virtual identity may also be any one of the combinations included in a subset of all possible combinations of the four STAs of the eight STAs.
  • the foregoing signaling defines a total of 16 user group groups, so that the virtual identifiers have C1, C2, C3, ..., C16 different combinations, and each virtual identifier represents 4 out of 8 STAs. Any of all possible combinations of STAs. Since there are a total of 70 combinations in 8 , it is necessary to represent at least 7 bits for each of these combinations. The corresponding extension ID requires at least 7 bits.
  • the bit of a certain location is 1, indicating that the corresponding STA is in the user group Group indicated by Ci, and the bit of a certain location is 0, indicating that the corresponding STA is not in the group indicated by Ci.
  • the STA After receiving the above signaling, the STA counts the total number of 1 out of all 7 bits.
  • the user group includes the 2nd, 4th, and 6th STAs indicated by the Group ID, that is, B, D, and F.
  • the virtual user group since the virtual user group must include 4 STAs, it can be inferred that the virtual user group defined by C2 also contains H, that is, it A total of four STAs of B, D, F, and H are included.
  • each STA After receiving the group ID and the combination identifier, each STA first determines, according to the combination identifier, the combination identifier to indicate the determined STA in all the STAs indicated by the group ID, and then extracts the corresponding STA combination from all the STAs indicated by the group ID. STAs at various locations, thereby determining the respective STAs corresponding to the group.
  • the general representation of the various various signaling or data packets identified by the Group ID and the above combined identification is shown below:
  • the combined identifier has the following functions:
  • the combined identifier indicates that the current Group ID and the combined MU-MIMO group indicated by the combined identifier are the MU-MIMO group definition i or the signaling defined by the MU- Which MU-MIMO group in the MIMO group.
  • the STA After receiving the group ID and the combination identifier, the STA determines, which one of the MU-MIMO groups of the MU-MIMO group defined by the foregoing MU-MIMO group definition domain signaling, and then passes the MU-MIMO group. Domain The information contained in the signaling determines each STA corresponding to the MU-MIMO group (ie, Group).
  • the MU-MIMO group described above defines i or signaling for defining each MU-MIMO group.
  • the definition of the MU-MIMO group needs to be modified, it can be implemented by issuing a new MU-MIMO group definition i or signaling.
  • the communication system can use these defined MU-MIMO groups for MU-MIMO transmission and reception, for example, the AP sends a frame, including the above.
  • the STA After receiving the foregoing frame, the STA determines the STA included in the current MU-MIMO group by using the Group ID and the combined identifier to determine whether it is in the current MU-MIMO group, and if it is in the current MU-MIMO group, receives the corresponding The data sent to itself, if not in the current MU-MIMO group, does not need to receive data.
  • the first implementation is: Each subset of the subsets that can be included meets a specific location and can only be a specific STA. For example, you can specify that the first STA in the group can only be A or E. The second STA in the group can only be B or F. The third STA in the group can only be C or G, but in the Group. The fourth STA can only be D or H.
  • the first STA in the frame is E; the second bit is 0, indicating that the second STA in the group is B, and the second bit is 1 indicating that the second STA in the group is F; the third bit is 0. Indicates that the third STA in the group is C, and the third bit is 1 indicating that the third STA in the group is G; the fourth bit is 0, indicating that the fourth STA in the group is D, and the fourth A bit of 1 indicates that the fourth STA in the Group is H.
  • each Ci can represent one of the subsets with 4 bits. Combination. For example, if Ci is 0101, it means that the first, second, third, and fourth STAs of the group are A, F, C, and H, respectively.
  • the MU-MIMO can be indicated by the corresponding Group ID and the combined identifier. group.
  • the minimum number of bits occupied by the combined identifier is 2, that is, when each of the four MU-MIMO groups is indicated by the corresponding Group ID and combined identifier, only 2 bits are needed for the combined identifier.
  • MU-MIMO groups ie, the indicated STA combinations
  • C1, C2, C3, and C4 may be indicated by 00, 01, 10, and 11, respectively.
  • multiple MU-MIMO groups are defined by MU-MIMO group definition domain signaling, and the multiple MU-MIMO groups are several combinations of M from K STAs corresponding to the Group ID. The corresponding Group.
  • the group ID and the specified K STAs are transmitted, and then the signaling is not used, but the AP and each STA obtain the K STAs according to the protocol.
  • a plurality of MU-MIMO groups are defined by MU-MIMO group definition domain signaling, where the plurality of MU-MIMO groups are obtained from K STAs corresponding to the Group ID. Make a group corresponding to the combination.
  • the signaling may not be used, but the AP and each STA may derive a number of K STAs according to a predetermined protocol. Group corresponding to the combination.
  • the STA specified by the Group ID is transmitted first, including K STAs, K is greater than M, and M is the maximum number of STAs included in a multi-user MIMO group.
  • K STAs K is greater than M
  • M is the maximum number of STAs included in a multi-user MIMO group.
  • each MU-MIMO group is directly indicated by the corresponding Group ID and combined identification.
  • the above signaling actually defines 70 Groups, that is, all possible combinations. Therefore, after the above signaling, each MU-MIMO group can be directly indicated by the corresponding Group ID and combined identifier.
  • the combined identifier uses 7 bits, as shown below.
  • the user group sequence number is identified by a combination of 7 bits, and one of all possible 70 combinations can be indicated in a manner agreed upon in advance by agreement.
  • each STA After receiving the group ID and the combination identifier, each STA first determines the location of each STA in the STA combination of the group according to the combination identifier, and then removes the STA combination from all the STAs indicated by the group ID. Corresponding STAs at each location, thereby determining each STA corresponding to the group. It is easy to see that in the current embodiment, the current indication can be directly indicated by the combined identification A combination of STAs corresponding to one MU-MIMO group.
  • E, F, G, 7 STAs The bit of a certain location is 1 , indicating that the corresponding STA is in the group indicated by the combined identifier, and the bit of a certain location is 0, indicating that the corresponding STA is not in the group indicated by the combined identifier.
  • the STA After receiving the above signaling, the STA counts the total number of 1 out of all 7 bits. If the total number is 4, it indicates that the group already contains 4 STAs, and the corresponding STA H is not in the group indicated by the combined identifier. If the total number is 3, it means that the group only contains 3 STAs, and the corresponding STA H must be in the group indicated by the combination identifier.
  • each of the combined identifiers may also contain 8 bits, which are in the order of - 8 B, C, D, E, F, G, H. Specifically, in the combined identifier including 8 bits, it is not always always 4, and may be 3, 2, or 1 1. This can balance the scenario where the number of STAs actually scheduled by multi-user MIMO is less than 4. For greater flexibility.
  • the above signaling defines 16 Groups, which correspond to a subset of all possible 70 combinations. Therefore, after the above signaling, each MU-MIMO group can be directly indicated by the corresponding Group ID and combined identifier, as shown below.
  • An implementation manner may be: The 16 groups that are actually defined by the foregoing signaling all meet a specific location and can only be a specific STA. For example, you can specify that the first STA in the group can only be A or E. The second STA in the group can only be B or F. The third STA in the group can only be C or G, but in the Group. The fourth STA can only be D or H. Correspondingly, the combined identifier can occupy only 4 bits.
  • the first bit is 0, indicating that the first STA in the group is A, and the first bit is 1 indicating that the first STA in the group is E;
  • Two bits of 0 indicate that the second STA in the group is B, and a second bit of 1 indicates that the second ST A in the group is F;
  • the third bit is 0 indicating that the third STA in the group is C, and the third bit is 1 indicating that the third STA in the group is G;
  • the fourth bit is 0 indicating that the fourth STA in the group is D, and the fourth bit is 1 indicating the fourth in the Group
  • the combined identifier can represent one of the 16 groups by 4 bits.
  • the combination identifier is 0101, it indicates that the first, second, third, and fourth STAs of the group are A, F, C, and H respectively; after receiving the foregoing signaling, the STA can know the group indicated by the signaling.
  • the 8 octaves included are eight, F, C, and H. It is also possible to use another new implementation, the above signaling defining 36 Groups, which correspond to a subset of all possible 70 combinations. Therefore, after the above signaling, each MU-MIMO group can be directly indicated by the corresponding Group ID and combined identifier, as shown below.
  • the eight STAs indicated by the Group ID can be divided into two subgroups, ABCD and EFGH.
  • the 16 groups defined by the above signaling satisfy that two STAs in the group are selected from the ABCD subgroup.
  • the other two STAs are selected from this subgroup of EFGH.
  • There are a total of 6 different combinations, so that the subset contains a total of 6 x 6 36 different combinations, so that the combined identifier occupies at least 6 bits.
  • the bit sequence indicating the combined identifier and the 36 combinations may have various-corresponding relationships. It is easy to see from the above description that the Ci used in each virtual group defined in the previous embodiment may be used as the current embodiment.
  • the combined identifier to.
  • the number of STAs indicated by each group ID is not limited to eight, and may be any other number; the number of STAs included in each group is not limited to four, and may be any other number; and each MU-MIMO group defines a domain.
  • the number of Groups defined by the signaling is not limited to 16 or 4 as described in the embodiment, and may be any other number.
  • the data sent by the AP transmits the Group ID, the user's AID or data, and the extended ID through one frame.
  • the foregoing information may not be transmitted in the same MU-MIMO group definition domain signaling, but may be transmitted by multiple MU-MIMO group definition domain signaling.
  • the K STAs specified by the Group ID may be transmitted first.
  • n is equal to 16, as shown: CI C2 C3 C4
  • the second implementation manner may first transmit the first part of the K STAs specified by the Group ID, for example, the first K/2, for example, 4, and the corresponding signaling is as follows; Then, the last K/2 of the 8 STAs specified by the Group ID are transmitted, and the corresponding signaling is as follows;
  • the transfer then indicates the first 4 extension IDs in the different combinations: C1, C2, C3, C4, as follows:
  • each of the foregoing signalings usually needs to identify the signaling itself, which can be performed by various methods. Realized.
  • the corresponding sequence relationship may be indicated by a sequence of time or frequency domains, or may be indicated by an identifier of each signaling.
  • the method provided by the embodiment of the present invention specifies K users by using a group ID, and then selects M user terminals that can be supported by the system among the K users through the virtual identifier, and does not need to exhaust the exhaustion of various STA combinations and Group IDs. , the choice of the user terminal is realized, and the system overhead is reduced.
  • Embodiments of the present invention also provide an apparatus for implementing the above method.
  • a device for transmitting data in a multi-user MIMO system comprising:
  • a unit for sending a signaling frame where the signaling frame includes: a user group serial number Group ID; K user terminal identifiers and virtual identifiers, and the user group serial number Group ID identifier a user group composed of K user terminals;
  • the K user terminal identifiers where the K user terminal identifiers respectively correspond to K user terminals
  • the virtual identifier indicating a combination of user terminals composed of any M terminal users of the K user terminals
  • K is greater than M, and M is the number of user terminals supported by the system; the number of the virtual identifiers is a natural number less than or equal to;
  • a device for transmitting data by multi-user MIMO comprising:
  • a sending unit configured to send a user group serial number Group ID and K user terminal identifiers, where the user terminal identifiers respectively correspond to one user terminal, and the user group serial number Group ID identifies the K user terminals a group of users;
  • the virtual identifier indicates a user end composed of any M terminal users of the K user terminals End combination, the end user in the combination of the M STAs indicated by the virtual identifier receives the data; where K is greater than M, and M is the number of user terminals supported by the system; the number of the virtual identifiers is a natural number less than or equal to.
  • a device for transmitting data by multi-user MIMO comprising:
  • a first sending unit configured to send a user group serial number Group ID and a K user terminal identifier, where the user terminal identifiers respectively correspond to one user terminal, and the user group serial number Group ID identifies the K a user group composed of user terminals;
  • a second sending unit configured to send a combined identifier, where the combined identifier is used to determine that the combined identifier indicates the K user terminals, M user terminals;
  • a third sending unit configured to send data, where the M user terminals determined by the combined identifier receive the data; where K is greater than M, and M is the number of user terminals supported by the system; the number of the virtual identifiers is less than A natural number equal to.
  • the user group consisting of the K user terminals is identified by the user group serial number Group ID.
  • the i-th bit is 1, indicating that the STA indicated by the corresponding AIIi is in the virtual group indicated by the virtual identifier Ci, and the i-th bit is 0, indicating that the STA indicated by the corresponding AIDi is not in the virtual group indicated by Ci.
  • the ith bit is 0, the table
  • the STA indicating the corresponding AIDi indication is in the virtual group indicated by Ci, and the i-th bit is 1, indicating that the ST A indicated by the corresponding AIDi is not in the virtual group indicated by Ci.
  • the virtual identifier occupies at least 4 bits, which is indicated by a bitmap of one bit.
  • One implementation may be to first intercept the first 4 bits of the bitmap. If the first 4 bits of the bitmap have 2 1 or 4 1s, the combination of Ci is derived from the first 4 bits of the bitmap, that is, the first 4 bits of the bitmap have 2 1s, and the last 2 STAs are represented by Ci. In the combination; the first 4 bits of the bitmap have 4 1s, and the last 2 STAs are not in the combination represented by Ci. If there are three 1s in the first 4 bits of the bitmap, there are two cases, that is, the first or the second of the last two STAs is in the combination represented by Ci.
  • Ci When the first one of the last two STAs is in the combination indicated by Ci, then Ci is set equal to the first 4 bits of the bitmap; and when the second of the last two STAs is in the combination represented by Ci, Let Ci be equal to the result of bitwise inversion of the first 4 bits of the bitmap, so that there is only one 1 in Ci.
  • the STA-side After receiving the MU-MIMO group-defined domain signaling, the STA first determines the number of 1 out of 4 bits of Ci.
  • the number of 1 is 2, then the first 4 STAs corresponding to the corresponding position (assuming 4 bits in sequence - corresponding to the first 4 STAs) and the last two STAs are in the virtual group; the number of 1 is 4, then corresponding The STA of the location is in the virtual group, and the last two STAs are not; the number of 1 is 3, then the corresponding location and the first of the last two STAs are in the virtual group; the number of 1 is 1, first The bit is inverted, then the 3 STAs in the corresponding position and the 2nd of the last two STAs are in In the virtual group.
  • the first 6 bits of the bitmap are first intercepted to represent Ci.
  • the STA determines the number of 1 out of 6 bits of Ci. The number of 1 is 3, then the corresponding location and the last STA are in the virtual group; the number of 1 is 4 , then the STA in the corresponding location is in the virtual group, and the last STA is absent.
  • the virtual identifier occupies at least 7 bits.
  • the 7 bits of the virtual identity can represent all 126 combinations.
  • the combination of the virtual identifiers is derived from the first 8 bits of the bitmap, that is, the first 8 bits of the bitmap have 2 1s, and the last 2 STAs are in the virtual identifier. In the combination of representations; the first 8 bits of the bitmap have 4 1s, and the last 2 STAs are not in the combination represented by the virtual identifier. If there are three 1s in the first 8 bits of the bitmap, there are two cases, that is, the first or the second of the last two STAs is in the combination indicated by the virtual identifier.
  • the virtual identifier is equal to the first 8 bits of the bitmap; and when the second of the last two STAs is in the combination indicated by the virtual identifier, let It is equal to the result of bitwise inversion of the first 8 bits of the bitmap, so that there are only five 1s in Ci.
  • the STA After receiving the MU-MIMO group definition domain signaling, the STA first determines the number of 1 out of 8 bits of Ci. The number of 1 is 2, then the first 4 STAs corresponding to the corresponding position (assuming 4 bits in sequence - corresponding to the first 4 STAs) and the last two ST As are in the virtual group; the number of 1 is 4, then The STA of the corresponding location is in the virtual group, and the last two STAs are not; the number of 1 is 3, then the corresponding location is And the first one of the last two STAs is in the virtual group; the number of 1 is 5, and the bit is reversed bit by bit, then the 3 STAs in the corresponding position and the 2nd of the last two STAs are in the virtual group. in.
  • Ci takes at least 9 bits, which is indicated by a bit of a bit.
  • the STA After receiving the MU-MIMO group definition domain signaling, the STA first determines the number of 1 out of 9 bits of Ci. The number of 1 is 2, then the first 4 STAs corresponding to the corresponding position (assuming 4 bits in sequence - corresponding to the first 4 STAs) and the last two ST As are in the virtual group; the number of 1 is 4, then The STAs in the corresponding location are in the virtual group, and the last two STAs are not present; the number of 1 is 3, then the corresponding location and the first of the last two STAs are in the virtual group; the number of 1 is 6, first The bitwise negation, then the 3 STAs in the corresponding position and the 2nd of the last two STAs are in the virtual group.
  • each STA is ABCDE. If ABCD can only be in the 1st to 4th positions of the virtual group, and E can only be in the 1st position, Ci will occupy at least 1 bit, indicating that the first one is A or E. If the ABCD can only be in the first to fourth positions of the virtual group, and E can be in all positions, then Ci takes at least 2 bits, indicating the position of E.
  • each STA is ABCDEF. If ABCD can only be in the first to fourth positions of the virtual group, and E can only be in the first position, F can only be in the second position, then Ci takes at least 2 bits, indicating that the first one is A or E, and the second is B or F.
  • Ci occupies at least 5 bits, 2 bits indicate the STA of the 1st position, and STAs of the 2nd, 3rd, and 4th positions are each indicated by 1 bit.
  • an implementation when the combination identifier is used for each ⁇ value other than 8 ( 5 ⁇ ⁇ ⁇ 16 ).
  • each virtual group is any of all possible combinations.
  • the i-th bit is 1, indicating that the STA indicated by the corresponding AIIi is in the virtual group indicated by Ci, and the i-th bit is 0, indicating that the STA indicated by the corresponding AIDi is not in the virtual group indicated by Ci.
  • the number of the bitmaps is not always four, and may be three, two, or one, so that the scenario in which the number of STAs actually scheduled by the multi-user MIMO is less than 4 is obtained, thereby obtaining a higher flexibility.
  • Ci can be used as the combined identifier used when using the virtual group.
  • the virtual group always includes 4 STAs, and the above-mentioned multi-user MIMO group part (ie, CI, C2, 7) can be further implemented by some methods.
  • Bit compression below we introduce two compression methods. To be confused with the compression method proposed above, it is referred to herein as a multi-user MIMO group recompression method.
  • each multi-user MIMO group is represented by n bits, and the number of multi-user MIMO groups actually used is x. Still further, an optimized implementation is presented to recompress the bits.
  • the order of the multi-user MIMO combination corresponding to the virtual identifier Ci is agreed, so that the effects of the X used MIMO user combinations and the enumerated (Nx) disabled MIMO user groups are The same.
  • the correspondence of a single cartridge can be as shown in Table 1:
  • the sequence consisting of 8 binary numbers in the first column It is indicated that the ith binary number in the sequence indicates the selection of the ith STA, and when it takes 1 or 0, it indicates that the corresponding STA is selected or not selected.
  • the first column arrangement is arranged from top to bottom in a binary sequence from small to large.
  • a sequence consisting of the remaining 7 binary numbers after the last bit of the binary sequence in the first column is removed can be used as a representation of the multi-user MIMO group.
  • the multi-user MIMO group representation of the second column corresponds to CI, C2, and C70 from top to bottom.
  • Table 1 Example of the relationship between Ci and multi-user MIMO group
  • an additional enable/disable indication bit can be set to indicate whether the listed MIMO user group is allowed or prohibited. For example, 0 means that the group is allowed to be used, and 1 means that the group is prohibited. In practice, the opposite can also be made. Agreement).
  • the enable/disable indication bit can be set to 0, and all MIMO user groups allowed to be used are enumerated; thus, when x>N/2, the enable/disable indication bit can be set to 1, And list all MIMO user groups that are forbidden to use.
  • the number of possible occurrences of virtual identifiers (C1, C2, Cx) is to extract x samples from the library containing N samples.
  • the number of permutations that is, lc g 2 ( PN ) bits can be used to represent the X allowed MIMO user groups CI, C2, Cx; if the order of the virtual identifiers (CI, C2, Cx) has been agreed upon (ie, once Ci and Cj appear, if i ⁇ j, there must be Ci before Cj), then the number of possible cases of CI, C2, Cx is the combination of extracting X samples from the library containing N samples.
  • the number, that is, ⁇ ( ⁇ ) bits can be used to represent the X allowed MIMO user groups CI, C2, Cx.
  • X 1 represents the rounding up of X.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Abstract

La présente invention concerne le domaine des communications, et en particulier la technologie de transmission de données d'entrées multiples sorties multiples multi-utilisateur. Un procédé pour la transmission par système d'entrées multiples sorties multiples multi-utilisateur pour la transmission de données, comprend: la transmission d'une trame de signalisation comportant: une identité de groupe d'utilisateurs, K identifiants de station, et une identification virtuelle, les K identifiants de station correspondant aux K stations respectivement, l'identification virtuelle indiquant un ensemble de stations composé de M stations quelconque dans les K stations, et l'identité de groupe d'utilisateurs correspondant à l'ensemble de stations indiqué par l'identification virtuelle; K est supérieur à M, M est le nombre de stations fonctionnant sous le système, et le nombre d'identifications virtuelles est un nombre naturel inférieur ou égal à K; et les données sont transmises, et un utilisateur final dans l'ensemble de M stations indiqué par l'identification virtuelle reçoit des données transmises depuis le système d'entrées multiples sorties multiples multi-utilisateur.
PCT/CN2011/079665 2010-09-15 2011-09-15 Procédé et dispositif pour un système d'entrées multiples sorties multiples multi-utilisateur pour la transmission de données WO2012034521A1 (fr)

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CN201010282343.3 2010-09-15
CN201010282343 2010-09-15
CN201010292585.0 2010-09-16
CN201010292585.0A CN102404087B (zh) 2010-09-16 2010-09-16 多用户mimo系统发送数据的方法与装置

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050138199A1 (en) * 2003-12-23 2005-06-23 Qinghua Li Parallel wireless communication apparatus, method, and system
CN101098188A (zh) * 2006-06-26 2008-01-02 华为技术有限公司 空分多址资源指配的实现方法、装置和系统
CN101296013A (zh) * 2007-04-27 2008-10-29 株式会社日立制作所 Mimo无线通信系统、mimo无线通信装置及无线通信方法
CN101378287A (zh) * 2007-08-27 2009-03-04 中兴通讯股份有限公司 一种多用户多输入多输出系统下行方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050138199A1 (en) * 2003-12-23 2005-06-23 Qinghua Li Parallel wireless communication apparatus, method, and system
CN101098188A (zh) * 2006-06-26 2008-01-02 华为技术有限公司 空分多址资源指配的实现方法、装置和系统
CN101296013A (zh) * 2007-04-27 2008-10-29 株式会社日立制作所 Mimo无线通信系统、mimo无线通信装置及无线通信方法
CN101378287A (zh) * 2007-08-27 2009-03-04 中兴通讯股份有限公司 一种多用户多输入多输出系统下行方法

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