WO2012119457A1 - Procédé et dispositif de configuration de mode mimo - Google Patents

Procédé et dispositif de configuration de mode mimo Download PDF

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Publication number
WO2012119457A1
WO2012119457A1 PCT/CN2011/081518 CN2011081518W WO2012119457A1 WO 2012119457 A1 WO2012119457 A1 WO 2012119457A1 CN 2011081518 W CN2011081518 W CN 2011081518W WO 2012119457 A1 WO2012119457 A1 WO 2012119457A1
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WO
WIPO (PCT)
Prior art keywords
subband
signaling
sig
vht
mimo mode
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PCT/CN2011/081518
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English (en)
Chinese (zh)
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朱胡飞
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华为技术有限公司
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Publication of WO2012119457A1 publication Critical patent/WO2012119457A1/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
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters

Definitions

  • the embodiments of the present invention relate to the field of mobile communications technologies, and in particular, to a MIMO mode selection method and apparatus.
  • the bandwidth requirement of a wireless communication system is usually implemented by a plurality of non-overlapping sub-bands.
  • a bandwidth requirement of 160M can be achieved by two 80M subbands, or a bandwidth requirement of 120M can be achieved by one 80M subband and one 40M subband.
  • Different subbands in the network use the same MIMO (Multiple-Input Multiple-Out-put, multiple input multiple output mode.
  • Embodiments of the present invention provide a MIMO mode configuration method and apparatus to improve system performance.
  • a MIMO mode configuration method includes:
  • a MIMO mode corresponding to the channel performance is configured for each subband separately.
  • a MIMO mode configuration apparatus includes:
  • a parameter obtaining module configured to acquire channel performance parameters of each sub-band in the communication network
  • a channel performance determining module configured to determine channel performance of each subband according to the channel performance parameter
  • a MIMO mode configuration module is configured to configure a MIMO mode corresponding to the channel performance for each subband separately.
  • the MIMO mode is separately configured according to the channel performance of each sub-band, which can meet the performance requirements of different sub-bands, thereby improving the overall communication system. performance.
  • FIG. 1 is a flowchart of a method according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a device according to an embodiment of the present invention.
  • the MIMO mode configuration method is implemented in the embodiment of the present invention.
  • the implementation manner is as follows:
  • the channel performance parameter may include, but is not limited to, a channel coefficient, a parameter of a noise size, a parameter of an interference size, a quality of service parameter, and a throughput parameter.
  • the channel performance of each sub-band can be determined according to the channel coefficient, the parameter of the noise size, the parameter of the interference size, the quality of service parameter, and the throughput parameter, and can be implemented by using an existing implementation method.
  • the configuration is performed according to a preset configuration policy, and the configuration policy describes a MIMO mode corresponding to different channel performances.
  • the method provided by the embodiment of the present invention can adaptively configure the MIMO mode for each sub-band, and meet the performance requirements of different sub-bands.
  • the same MIMO mode is used compared to each sub-band in the prior art, which effectively improves system performance.
  • the method provided by the embodiment of the present invention may further include, in S103, transmitting, for each subband, MIMO mode information configured for the subband on a communication channel of the subband. In order to inform the receiving end on each sub-band, the MIMO mode adopted by the sub-band.
  • the method provided by the embodiment of the present invention may be applied to various communication networks.
  • the foregoing S103 may include:
  • a Reserved field in the VHT-SIG-A1 signaling as a subband indication field
  • the subband indication field is used to indicate the VHT- Subband corresponding to SIG-A1 signaling
  • STBC Space
  • the Coding, Space Time Code Block field and the NSTS (Stream Number Allocation Information) field configure the
  • the length of the reserved field is 2 bits, and all or part of the bits in the reserved field are used as the subband indication field; and according to whether the MIMO mode configured for the subband corresponding to the VHT-SIG-A signaling is used.
  • the STBC field is configured in the STBC coding mode (the length of the STBC field is 1 bit, which is used to indicate whether to use the STBC coding mode), and the NSTS field is configured according to the number of streams in the MIMO mode (the length of the NSTS field is 12 bits, which is used to indicate the MIMO mode. The number of streams is assigned information).
  • the same VHT-SIG-A1 signaling is transmitted in each sub-band, and in the above manner, the existing VHT-SIG-A1 signaling is extended, so that the receiving end of each sub-band is received.
  • the subband indication field in the extended VHT-SIG-A1 signaling is obtained by parsing, and the extended VHT-SIG-A1 letter is obtained according to the subband indication field.
  • VHT-SIG-B very High throughput signal B, ultra high rate signal B
  • VHT-SIG-A2 signaling do not carry any useful information, therefore, can be transmitted using VHT-SIG-B signaling or VHT-SIG-A2 time-frequency resources to not include Primary
  • the MIMO mode information of the subband configuration of the channel may be specifically implemented by using VHT-SIG-A1 signaling to include Primary.
  • the MIMO mode information of the subband configuration of the channel is transmitted using the same time-frequency resource as the VHT-SIG-B signaling or the VHT-SIG-A2 signaling, and the information transmission signaling is carried as MIMO mode information including the subband configuration of the primary channel.
  • VHT-SIG-A1 signaling is transmitted in each sub-band, so that the primary is not included.
  • the receiving end of the subband of the channel can accurately receive the MIMO mode information configured for the subband, and the receiving end needs to be configured in advance so that the receiving end is in the time frequency of VHT-SIG-B signaling or VHT-SIG-A2. Obtain information transmission signaling on the domain and parse the MIMO mode information therein.
  • the VHT-SIG-A1 signaling is respectively configured for each sub-band, and the VHT-SIG-A1 signaling carries the MIMO mode information of the corresponding sub-band; and the corresponding VHT is sent on each sub-band respectively.
  • -SIG-A1 signaling is respectively configured for each sub-band, and the VHT-SIG-A1 signaling carries the MIMO mode information of the corresponding sub-band; and the corresponding VHT is sent on each sub-band respectively.
  • the AP Before the Point, the access point communicates with multiple STAs (station), the AP needs to send VHT-SIG-A signaling and VHT-SIG-B signaling to each STA.
  • the VHT-SIG-A signaling further includes: VHT-SIG-A1 signaling and VHT-SIG-A2 signaling.
  • both subbands use multi-user MIMO.
  • the implementation manner of adaptively configuring the multi-user MIMO mode is as shown in FIG. 2, and specifically includes the following operations:
  • the AP acquires channel performance parameters of subbands fed back by each STA.
  • the AP determines the channel performance of the upper 80M subband according to the channel performance parameter of the upper 80M subband, and configures the MIMO mode for the upper 80M subband according to a preset configuration policy, and the AP according to the channel performance parameter of the lower 80M subband, Determining the channel performance of the upper 80M subband, and configuring the MIMO mode for the lower 80M subband according to a preset configuration policy;
  • the configuration policy may be: adaptively selecting the MIMO mode according to the throughput rate of each sub-band on the premise that the quality of service of the sub-band is unchanged; the configuration policy may also be: the throughput rate is unchanged.
  • the MIMO mode is adaptively selected according to the quality of service of each subband.
  • the current group includes four STAs, and according to the channel performance parameters of the upper 80M subband, the number of streams in each 80M subband is set to be 2, 2, 2, and 0; respectively, according to the channel performance of the lower 80M subband. Parameters: In the 80M subband, the number of flows of each STA is: 2, 0, 2, and 0.
  • the interference of the lower 80M sub-band is strong, and the orthogonal performance of the multi-user MIMO channel is poor, and the number of multi-user MIMO streams cannot be supported. Therefore, the number of streams of the MIMO mode configured for the lower 80M sub-band is small.
  • the AP constructs the extended VHT-SIG-A1 signaling, and uses all or part of the reserved field in the original VHT-SIG-A1 signaling as a subband indication bit to indicate the signaling.
  • NSTS field
  • the STBC field is used to indicate whether the configured multi-user MIMO mode adopts the STBC coding mode
  • the NSTS field is used to indicate the number of flows of the configured multi-user MIMO mode.
  • the AP sends the extended VHT-SIG-A1 signaling, so that the STAs on each subband learn the multi-user MIMO mode configured by the corresponding sub-band.
  • each STA After receiving the VHT-SIG-A1 signaling, each STA parses the VHT-SIG-A1 signaling, and if the VHT-SIG-A1 signaling is found to carry the sub-band indication bit, according to the sub-band The indication bit determines whether the VHT-SIG-A1 signaling is the VHT-SIG-A1 signaling corresponding to the sub-band in which the STA is located, and if yes, obtains the MIMO mode information carried therein, otherwise, may, but is not limited to, discard the VHT -SIG-A1 signaling.
  • VHT-SIG-A1 the extension of the VHT-SIG-A1 signaling is exemplified.
  • other signaling may also be applied to carry multi-user MIMO signaling configured for each sub-band.
  • the method provided in the first embodiment of the present invention can adaptively configure the multi-user MIMO mode for the two sub-bands according to the channel performance parameters of the upper 80M sub-band and the lower 80M sub-band, respectively, and meet the performance requirements of different sub-bands. This improves the overall performance of the system.
  • the multi-user MIMO mode in the entire bandwidth is the same, and the upper 80M sub-band and the lower 80M sub-band use the same signaling.
  • the existing signaling is extended.
  • the sub-bands correspond to one signaling, so that the STAs on the sub-band can learn the multi-user MIMO mode of the sub-band configuration, which effectively ensures the reliability of the communication.
  • Embodiment 1 of the present invention can also be applied to a network defined by the 802.11ac standard of 120M bandwidth requirement.
  • the processing procedure refer to the processing procedure of the first embodiment of the present invention.
  • the extended signaling indicates whether the signaling corresponds to an 80M subband or a 40M subband.
  • the application scenario of the first embodiment is taken as an example.
  • the implementation manner of the adaptively configuring the multi-user MIMO mode for each sub-band is as shown in FIG. 3 , and specifically includes the following operations:
  • the AP acquires a channel performance parameter of a subband fed back by each STA.
  • the AP determines the channel performance of the upper 80M subband according to the channel performance parameter of the upper 80M subband, and configures the MIMO mode for the upper 80M subband according to a preset configuration policy, and the AP according to the channel performance parameter of the lower 80M subband, Determining the channel performance of the upper 80M subband, and configuring the MIMO mode for the lower 80M subband according to a preset configuration policy;
  • the AP configures the STBC field and the NSTS field in the VHT-SIG-A1 signaling corresponding to the 80M subband and the VHT-SIG-A1 signaling corresponding to the lower 80M subband according to the multi-user MIMO mode configured in S302.
  • the STBC field is used to indicate whether the configured multi-user MIMO mode adopts the STBC coding mode
  • the NSTS field is used to indicate the number of flows of the configured multi-user MIMO mode.
  • the AP sends the foregoing VHT-SIG-A1 signaling for the upper 80M subband configuration on the communication channel of the upper 80M subband, and sends the foregoing VHT-SIG for the lower 80M subband configuration on the communication channel of the lower 80M subband.
  • -A1 signaling so that the STAs on each subband are aware of the multi-user MIMO mode configured by the corresponding sub-band;
  • each STA After receiving the VHT-SIG-A1 signaling, each STA parses the VHT-SIG-A1 signaling to obtain MIMO mode information carried therein.
  • the multi-user MIMO mode is adaptively configured for the two sub-bands according to the respective channel performance parameters of the upper 80M sub-band and the lower 80M sub-band, and the performance requirements of different sub-bands are satisfied.
  • the multi-user MIMO mode in the entire bandwidth is the same, and the upper 80M sub-band and the lower 80M sub-band use the same signaling.
  • different signaling is configured for different sub-bands respectively.
  • the MIMO mode information configured for the corresponding subband is carried in the signaling, and the reliability of the communication is effectively ensured by transmitting signaling carrying the respective MIMO mode information in different subbands.
  • VHT-SIG-A2 signaling or VHT-SIG-B signaling time-frequency resource transmission can be used to configure MIMO mode information for the lower 80M subband.
  • configuration needs to be performed on the receiving end of the lower 80M subband in advance, so that the receiving end of the lower 80 subband can receive and recognize the VHT-SIG-A2 signaling or the VHT-SIG-B signaling.
  • the MIMO mode information configured in the frequency domain is configured for the lower 80M subband.
  • the implementation manner of the second embodiment of the present invention specifically includes the following operations:
  • the AP acquires a channel performance parameter of a subband fed back by each STA.
  • the AP determines the channel performance of the upper 80M subband according to the channel performance parameter of the upper 80M subband, and configures the MIMO mode for the upper 80M subband according to a preset configuration policy, and the AP according to the channel performance parameter of the lower 80M subband, Determining the channel performance of the 80M subband, and configuring the MIMO mode for the lower 80M subband according to a preset configuration policy;
  • the AP carries the MIMO mode information configured for the upper 80M subband in the VHT-SIG-A1 signaling, and sends the VHT-SIG-A1 signaling.
  • the AP constructs information transmission signaling, and carries the MIMO mode information configured for the lower 80M subband in the information transmission signaling, and uses the same time frequency as the VHT-SIG-B signaling or the VHT-SIG-A2 signaling.
  • the resource transmits the information transmission signaling on the lower 80M subband.
  • the multi-user MIMO mode is adaptively configured for the two sub-bands according to the channel performance parameters of the upper 80M sub-band and the lower 80M sub-band, respectively, and the performance requirements of different sub-bands are satisfied. This improves the overall performance of the system.
  • the multi-user MIMO mode in the entire bandwidth is the same, the upper 80M sub-band and the lower 80M sub-band use the same signaling, and in the third embodiment, the VHT-SIG is utilized on the lower 80M sub-band.
  • the time-frequency resource transmission of the B signaling or the VHT-SIG-A2 signaling is the MIMO mode information configured in the lower 80M sub-band, so that the STA on the sub-band can learn the sub-band without occupying more bandwidth resources.
  • the configured multi-user MIMO mode effectively ensures the reliability of communication.
  • an upper 80M subband and a lower 80M subband are included. Both subbands use single-user MIMO.
  • the implementation process of the first embodiment, the second embodiment, or the third embodiment may be referred to, and details are not described herein again.
  • the single-user MIMO mode configured for different sub-bands is used. If the current group contains one STA, the number of flows of the STA is 8 in the 80M sub-band according to the channel performance parameters of the upper 80M sub-band. STBC; according to the channel performance parameter of the lower 80M subband, in the 80M subband, the number of streams of the STA is 6, and the STBC transmission is adopted.
  • the interference of the lower 80M subband is strong, and the orthogonal performance of the single user MIMO channel is poor, and the number of single-user MIMO streams cannot be supported. Therefore, the number of streams of the MIMO mode configured for the lower 80M subband is small.
  • each of the above embodiments can be used for the 120M bandwidth, and the lower 80M subband corresponds to the 80M subband in the 120M, and the upper 80M subband corresponds to the 40M subband in the 120M, and the corresponding embodiment for the 120M bandwidth can be obtained;
  • the upper 80M subband corresponds to the 80M subband in 120M
  • the lower 80M subband corresponds to the 40M subband in 120M to obtain a corresponding embodiment for 120M bandwidth.
  • All or part of the steps of implementing the foregoing method embodiments may be performed by hardware related to the program instructions.
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the steps of the foregoing method embodiments;
  • the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • the embodiment of the present invention further provides a MIMO mode configuration apparatus, which is applied to a MIMO network, and the device may be an AP or an STA.
  • the communication peers in the scenario may be APs or STAs.
  • the device in this embodiment is used to implement the foregoing method, and the device is used in the MIMO mode configuration process, and the foregoing method can be implemented completely.
  • the specific process is as described above.
  • the structure of the configuration device 50 is as shown in FIG. 5, and the specific implementation structure includes:
  • the parameter obtaining module 501 is configured to obtain channel performance parameters of each sub-band in the communication network, where the channel performance parameters may include, but are not limited to, a channel coefficient, a noise size parameter, an interference size parameter, a quality of service parameter, and a throughput parameter. .
  • the channel performance determining module 502 is configured to determine channel performance of each subband according to the channel performance parameter.
  • the MIMO mode configuration module 503 is configured to configure a MIMO mode corresponding to the channel performance for each subband according to a preset configuration policy.
  • the device provided by the embodiment of the present invention can adaptively configure the MIMO mode for each sub-band, which satisfies the performance requirements of different sub-bands.
  • the same MIMO mode is used compared to each sub-band in the prior art, which effectively improves system performance.
  • the device provided by the embodiment of the present invention further includes a configuration information sending module 504, configured to send, for each subband, MIMO mode information configured for the subband on a communication channel of the subband. In order to inform the users on each sub-band, the MIMO mode adopted by the sub-band.
  • the device provided by the embodiment of the present invention may be applied to various communication networks.
  • the configuration information sending module 504 includes a signaling structure submodule. 5041 and signaling sub-module 5042.
  • the receiving end of each sub-band can correctly obtain the MIMO mode information of the sub-band in the sub-band by carrying the sub-band indication field in the signaling.
  • the signaling structure sub-module 5041 is used.
  • the VHT-SIG-A1 signaling is extended, the extension includes: using a reserved Reserved field in the VHT-SIG-A1 signaling as a subband indication field, where the subband indication field is used to indicate the VHT- The sub-band corresponding to the SIG-A1 signaling; and the MIMO mode information of the sub-band corresponding to the VHT-SIG-A1 signaling is configured in the STBC field and the NSTS field in the VHT-SIG-A1 signaling; the signaling transmission sub-module 5042 is used.
  • the extended VHT-SIG-A1 signaling is sent.
  • the MIMO mode of the subband not including the primary channel may also be transmitted by using time-frequency resources of VHT-SIG-B signaling or VHT-SIG-A2 signaling on a subband not including the primary channel. information.
  • the signaling structure sub-module 5041 is configured to construct information transmission signaling, where the MIMO mode information configured as a sub-band not including the primary channel is carried in the information transmission signaling; the signaling transmission sub-module 5042 is configured to pass the VHT-
  • the SIG-A1 signaling is transmitted as the MIMO mode information of the subband configuration including the primary channel, and is transmitted by the same time-frequency resource as the VHT-SIG-B signaling or the VHT-SIG-A2 signaling.
  • corresponding VHT-SIG-A1 signaling may be separately configured for different sub-bands, and corresponding VHT-SIG-A1 signaling is transmitted in each sub-band.
  • the signaling structure sub-module 5041 is configured to separately configure VHT-SIG-A1 signaling for each sub-band, where the VHT-SIG-A1 signaling carries MIMO mode information of the corresponding sub-band; signaling sub-module 5042 is configured to send corresponding VHT-SIG-A1 signaling on each subband separately.

Abstract

La présente invention se rapporte à un procédé de configuration de mode MIMO. Le procédé selon l'invention consiste : à acquérir les paramètres de performance de canal de sous-bandes dans un réseau de communication ; à déterminer la performance de canal de chaque sous-bande sur la base des paramètres de performance de canal ; à configurer, pour chaque sous-bande, un mode MIMO correspondant à la performance de canal de la sous-bande. La présente invention se rapporte d'autre part à un dispositif de configuration de mode MIMO. Afin de répondre aux exigences de performance de la sous-bande, un mode MIMO est configuré pour chaque sous-bande sur la base de la performance de canal. La solution technique de la présente invention est donc apte à améliorer la performance globale du système de communication.
PCT/CN2011/081518 2011-03-07 2011-10-28 Procédé et dispositif de configuration de mode mimo WO2012119457A1 (fr)

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US20160065467A1 (en) * 2014-08-29 2016-03-03 Mediatek Inc. Configurable Signaling Field and its Indication
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