CN103002471A - Method, device and system for sounding channels - Google Patents

Method, device and system for sounding channels Download PDF

Info

Publication number
CN103002471A
CN103002471A CN 201110276263 CN201110276263A CN103002471A CN 103002471 A CN103002471 A CN 103002471A CN 201110276263 CN201110276263 CN 201110276263 CN 201110276263 A CN201110276263 A CN 201110276263A CN 103002471 A CN103002471 A CN 103002471A
Authority
CN
Grant status
Application
Patent type
Prior art keywords
station
receiving
ndpa
receiving station
beamforming
Prior art date
Application number
CN 201110276263
Other languages
Chinese (zh)
Other versions
CN103002471B (en )
Inventor
夏林峰
陈庆勇
王学寰
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/0626Channel coefficients, e.g. channel state information [CSI]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/40According to the transmission technology
    • Y02D70/44Radio transmission systems, i.e. using radiation field
    • Y02D70/442Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas
    • Y02D70/444Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas

Abstract

An embodiment of the invention provides a method, a device and a system for sounding channels, and relates to the field of communication. The method, the device and the system are used for shortening waiting time for each receiving station to the greatest extent under the condition that reception of feedback requests is unaffected, and the purpose of saving power is achieved. The method for sounding the channels includes transmitting a null data packet announcement (NDPA) broadcast packet to inform all relevant receiving stations about preparing for sounding the channels; transmitting a null data packet (NDP) broadcast packet to enable each relevant receiving station to compute respective relevant channel feedback information after the relevant receiving station receives the NDP broadcast packet; receiving the channel feedback information which is transmitted by the receiving station corresponding to first receiving station information carried in the NDPA broadcast packet; and sequentially transmitting the feedback requests to the other receiving stations from front to back according to an arrangement sequence of station information in the NDPA broadcast packet so that the channel feedback information transmitted by the other receiving stations can be received.

Description

一种信道探测的方法、装置及系统 A method for channel sounding, apparatus and system for

技术领域 FIELD

[0001] 本发明涉及通信领域,尤其涉及一种信道探测的方法、装置及系统。 [0001] The present invention relates to communication field, and particularly relates to a method for channel sounding, apparatus and system.

背景技术 Background technique

[0002] 无线通信协议美国电气和电子工程师协会(Institute of Electrical andElectronics Engineers,简称IEEE)802.1lac 引入的高吞吐率探测机制(VHT SoundingProtocol)是一种存在于波束成形发起者(beamformer)和波束成形接收者(beamformee)之间的信道侦测机制。 Detection mechanisms High Throughput (VHT SoundingProtocol) introduced by the American Association (Institute of Electrical andElectronics Engineers, referred to as IEEE) 802.1lac [0002] a wireless communication protocols Electrical and Electronics Engineers is a initiator present in the beam forming (the beamformer) and beamforming channel detection mechanism between the receiver (beamformee). 通过这种机制,波束成形发起者可以更好的知道和波束成形接收者之间的信道信息,从而通过调整相关参数来达到改善通信状况的目的。 By this mechanism, better beam-forming initiator may know and beamformed channel information between the receivers, so that by adjusting the parameters to achieve the purpose of improving the communication status. 高吞吐率探测机制根据其应用场景分为以下两种:多用户多入多出机制(Mult1-user multipleinput multiple output,以下简写为MU-MIM0)和单用户多入多出机制(Single-usermultiple input multiple output,以下简写为SU-MIM0)。 The high throughput detection mechanisms into which the following two scenarios: a multi-user multiple input multiple output mechanism (Mult1-user multipleinput multiple output, hereinafter abbreviated to MU-MIM0) and a single-user MIMO mechanism (Single-usermultiple input multiple output, hereinafter abbreviated as SU-MIM0). 通常情况下,对基本服务集(Basic Service Set,可以简称B SS)构成的网络来说,Beamformer对应的物理设备为接入点(Access Point,可以简称AP), Beamformee对应的物理设备为站点(Station,可以简称STA);对非基本服务集的自组网络来说,Beamformer对应的物理设备可以为某个STA,Beamformee对应的物理设备可以为其他STA。 Typically, the network Basic Service Set (Basic Service Set, may be referred to as B SS) configuration, the corresponding physical device Beamformer access point (Access Point, may be simply referred AP), Beamformee physical device corresponding to the site ( Station, the STA can be abbreviated); of the ad hoc network for a non-basic service set, Beamformer corresponding physical device may be a STA, Beamformee corresponding physical device may be other STA.

[0003] 传输机会(Transmit opportunity,可以简称TX0P)是指发送站点通过竞争周期的竞争机制获得传输特定通信类别的有界时段。 [0003] transmission opportunity (Transmit opportunity, may be simply referred TX0P) refers to a bounded time period the sending station transmitting a specific communication class is obtained by competition mechanism contention period. 在一个TXOP时限内,竞争成功的发送站点能够独占媒介资源,向其他站点发送单个或多个数据帧。 In a TXOP time, the sending station capable of successfully competing exclusive media resources, transmitting single or multiple data frames to other sites. TXOP有最长时限,当其结束后需要 TXOP longest time, when it needs to end

再竞争方可获得。 Competition again before obtain.

[0004] 如图1所示,在MU-MMO TXOP时间内,发送站点会先发一个空包通知(Null DataPacket Announcement,以下简称为NDPA)广播包通知所有相关的接收站点做好探测准备,图1所示的相关接收站点以3个为例,在实际应用中可以为2个或者2个以上;其中NDPA广播包的帧格式可以参考图2。 [0004] 1, in the MU-MMO TXOP time, the sending station will first send an empty packet notification (Null DataPacket Announcement, hereinafter referred to as the NDPA) notify all relevant broadcast packet receiving station to detect well prepared, FIG. Related to the receiving station shown in Example 3, in practical applications may be more or 2; wherein the frame format of the broadcast packet may NDPA 2 with reference to FIG. 接下来发送站点会发送一个空包(Null Data Packet,以下简称为NDP)广播包,所有相关的接收站点针对收到的NDP广播包计算相关的信道反馈信息,但是收到NDP广播包后只有当接收站点的AID和先前收到的NDPA广播包的第一个站点信息(STA Information,以下简称为STA Info)字段中的AID相等才可以立即向发送站点发送计算得到的信道反馈信息。 Next, the sending station sends a null packet (Null Data Packet, hereinafter referred to as NDP) broadcast packet, the receiving station calculates all the relevant information for a channel feedback NDP broadcast packets received, but only after receiving the broadcast packet if NDP the first station and the receiving station AID information previously received broadcast packet NDPA (STA information, hereinafter referred to as STA info) field is equal to the AID can be sent immediately to the transmitting station calculated channel feedback information. 对于其他的接收站点只有当它们分别收到来自发送站点的波束成形报告查询(Beamforming Repot Poll)的时候才会立即向发送站点发送计算得到的信道反馈信息,这种信道反馈信息通过高吞吐率波束成形压缩包(VHT CompressedBeamforming)反馈相应的信息。 For other receiving station only when they are received from the transmitting station reports the beamforming query (Beamforming Repot Poll) is calculated will be sent immediately to the transmitting station feedback information channel, this channel feedback information beam by a high throughput compression molding package (VHT CompressedBeamforming) corresponding feedback information.

[0005] 上述进行信道探测的过程中,在整个TXOP时间段内,所有的接收站点只有保持不进入睡眠状态直到正确完成反馈或者整个TXOP时间被消耗完,否则接收站点会由于提前进入睡眠状态而无法正确接收波束成形报告请求并正确反馈。 [0005] The process channel sounding above, throughout the TXOP period, all receiving sites only remains to sleep until the correct or complete the feedback entire TXOP time is consumed, or the receiving station may enter a sleep state due to early can not correctly receive beamforming feedback report request and correctly. 所以通常对于MU-MMO场景来说,除了NDPA广播包的第一个STA Info所对应的接收站点可以立即反馈外,其他被发送站点通过波束成形报告主动要求提供反馈信息的接收站点,其处于等待状态(即不进入睡眠状态)的时间比较长,这样就会造成消耗电量多的问题。 It is usually for the MU-MMO scene, in addition to the first STA Info NDPA corresponding receiving station may broadcast packet immediate feedback, other transmitting station is active by reporting requirements beamforming feedback information receiving station, which is in the waiting state (that is, not sleep) in a long time, this will cause the power consumption and more problems.

发明内容 SUMMARY

[0006] 本发明的实施例提供一种信道探测的方法、装置及系统,用以达到减少接收站点的等待时间,进而省电的目的。 Example [0006] The present invention provides a channel sounding method, apparatus and system for reducing latency to reach the receiving station, thereby saving purposes.

[0007] 为达到上述目的,本发明的实施例采用如下技术方案: [0007] To achieve the above object, embodiments of the present invention adopts the following technical solutions:

[0008] 一方面,提供一种信道探测的方法,包括: [0008] In one aspect, there is provided a channel sounding method, comprising:

[0009] 发送一个空包通知NDPA广播包,以通知相关接收站点做探测准备; [0009] transmitting a broadcast packet NDPA empty notification packet to notify the receiving station do probe preparation;

[0010] 继续发送一个空包NDP广播包,以使得相关接收站点收到NDP广播包后,计算各自相关的信道反馈信息; After [0010] NDP continues to send an empty packet broadcast packets, so that the associated receiving station receives broadcast packets NDP, calculate respective channel related feedback information;

[0011] 接收所述NDPA广播包中携带的第一个站点信息对应的接收站点所发送的信道反馈信息; [0011] NDPA receiving the broadcast channel carrying the first packet in a receiving station site information corresponding to the transmitted feedback information;

[0012] 按照所述NDPA广播包中站点信息排列顺序从前到后依次向其他接收站点发送反馈请求,以接收所述其他接收站点发送的信道反馈信息。 [0012] Information transmitted sequentially according to the order of the packet broadcast station NDPA from front to back to the feedback request the other receiving station, a channel to receive the other receiving station sends feedback information.

[0013] 另一方面,提供一种信道探测的方法,包括: [0013] In another aspect, there is provided a channel sounding method, comprising:

[0014] 接收发送站点所发送的NDPA广播包,做探测准备; [0014] NDPA receives the transmission station transmitted broadcast packets do probe preparation;

[0015] 接收发送站点所发送的NDP广播包,并计算自身相关的信道反馈信息; [0015] NDP received broadcast packet transmitted by the transmitting station, and calculates the own associated channel feedback information;

[0016] 进入睡眠直至到达预定的睡眠时间时,唤醒自己,以接收发送站点发送的反馈请求; Entering sleep until it reaches a predetermined sleep time [0016], their wake, to receive the transmitted feedback request transmitting station;

[0017] 在接收到所述反馈请求后,向所述发送站点发送所述信道反馈信息。 [0017] Upon receiving the feedback request, the sending station sends the channel feedback information.

[0018] —方面,提供一种站点,包括: [0018] - aspect, a site, including:

[0019] NDPA广播包发送单元,用于发送一个空包通知NDPA广播包,以通知该所有相关接收站点做探测准备; [0019] NDPA broadcast packet sending unit, configured to send a notification NDPA empty packet broadcast packet to notify the receiving station do all probe preparation;

[0020] NDP广播包发送单元,用于继续发送一个空包NDP广播包,以使得相关接收站点收到NDP广播包后,计算各自相关的信道反馈信息; After [0020] NDP broadcast packet transmission unit configured to continue to send a null packet NDP broadcast packets, so that the associated receiving station receives broadcast packets NDP, calculate respective channel related feedback information;

[0021] 第一信道反馈信息接收单元,用于接收所述NDPA广播包中携带的第一个站点信息对应的接收站点所发送的信道反馈信息; [0021] The first feedback channel information receiving unit for receiving the broadcast channel NDPA packet carries information corresponding to the first site to the receiving station the transmitted feedback information;

[0022] 第二信道反馈信息接收单元,用于按照所述NDPA广播包中站点信息排列顺序从前到后依次向其他接收站点发送反馈请求,以接收所述其他接收站点发送的信道反馈信 [0022] The second feedback channel information receiving unit, a broadcast packet in accordance with said NDPA site information are arranged from front to back sequentially transmitting the feedback request to the other receiving station, the channel to receive the feedback signal transmitted from the other receiving station

肩、O Shoulder, O

[0023] 另一方面,提供一种站点,包括: [0023] In another aspect, there is provided a site, comprising:

[0024] NDPA广播包接收单元,用于接收发送站点所发送的NDPA广播包,做探测准备; NDPA broadcast packets [0024] NDPA broadcast packet receiving unit, for receiving the transmitted sending station, to make the probe preparation;

[0025] NDP广播包接收单元,用于接收发送站点所发送的NDP广播包,并计算自身相关的信道反馈信息; [0025] NDP broadcast packet receiving unit configured to receive a broadcast packet transmitting station NDP transmitted, and calculates the own associated channel feedback information;

[0026] 唤醒单元,用于进入睡眠直至到达预定的睡眠时间时,唤醒自己,以接收发送站点发送的反馈请求; [0026] The wakeup unit, for entering a sleep until a predetermined time is reached sleep, wake themselves, to receive a transmission station transmits a feedback request;

[0027] 反馈信息发送单元,用于在接收到所述反馈请求后,向所述发送站点发送所述信道反馈信息。 [0027] The feedback information transmitting means for feedback after receiving the request, the sending station to transmit the channel feedback information.

[0028] 一方面,提供一种无线通信系统,包括:发送站点以及至少两个接收站点;[0029] 所述发送站点为上述一方面提供的站点; [0028] In one aspect, there is provided a wireless communication system, comprising: a sending station, and at least two receiving sites; [0029] The transmitting station site provided by the above-mentioned aspect;

[0030] 所述至少两个接收站点中除第一个接收站点之外的接收站点均为上述另一方面提供的站点。 [0030] The at least two receiving sites except the first receiving station receiving site site are provided by the above-described aspect.

[0031] 本发明实施例提供一种信道探测的方法、装置及系统,由于发送站点按顺序依次向除第一个之外的接收站点发送反馈请求,且所述除第一个之外的接收站点不必一直等待接收该反馈请求,而是进入睡眠直至到达预定的睡眠时间才唤醒自己以接收反馈请求;这样一来,可以在不影响接收反馈请求的情况下,尽可能多的减少接收站点的等待时间,进而达到省电的目的。 Embodiment [0031] The present invention provides a channel sounding method, apparatus and system for, since the transmission station sequentially transmits a feedback request to the receiving station except the first one sequentially, and the receiving except the first one of the sites do not have to wait to receive the feedback has been requested, but goes to sleep until it reaches a predetermined time before sleep wake up his request to receive feedback; as a result, it is possible without affecting receive feedback request, as much as possible to reduce the receiving station waiting time, and thus to save battery power. · ·

附图说明 BRIEF DESCRIPTION

[0032] 为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。 [0032] In order to more clearly illustrate the technical solutions in the embodiments or the prior art embodiment of the present invention, briefly introduced hereinafter, embodiments are described below in the accompanying drawings or described in the prior art needed to be used in describing the embodiments the drawings are only some embodiments of the present invention, those of ordinary skill in the art is concerned, without creative efforts, can derive from these drawings other drawings.

[0033] 图1为MU-MMO场景机制示意图; [0033] FIG. 1 is a schematic MU-MMO scene mechanism;

[0034] 图2为IEEE802.1lac NDPA广播包的帧格式; [0034] FIG. 2 is a frame format IEEE802.1lac NDPA broadcast packet;

[0035] 图3为本发明实施例提供的信道探测方法的示意图; [0035] FIG. 3 is a schematic diagram of the channel detection method according to an embodiment of the present invention;

[0036] 图4为本发明另一种实施例提供的信道探测方法的示意图; [0036] Fig 4 a schematic view of a channel sounding method provided in another embodiment of the present invention;

[0037] 图5为本发明又一实施例提供的信道探测方法的示意图; [0037] FIG. 5 is a schematic channel sounding method provided by another embodiment of the present invention;

[0038] 图6为计算预定睡眠时间方法的流程示意图; [0038] FIG. 6 is a schematic flow chart of a method of calculating a predetermined sleep time;

[0039] 图7为计算预定睡眠时间方法的示意图; [0039] FIG. 7 is a method of calculating a schematic predetermined sleep time;

[0040] 图8为本发明实施例提供的站点结构示意图; [0040] FIG. 8 a schematic structural diagram of a site embodiment of the invention;

[0041] 图9为本发明另一实施例提供的站点结构不意图; [0041] FIG. 9 site structure according to another embodiment of the present invention is not intended;

[0042] 图10为本发明又一实施例提供的站点结构示意图。 [0042] FIG. 10 is a schematic structural diagram of a site further embodiment of the present invention.

具体实施方式 detailed description

[0043] 下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。 [0043] below in conjunction with the present invention in the accompanying drawings, technical solutions of embodiments of the present invention are clearly and completely described, obviously, the described embodiments are merely part of embodiments of the present invention, but not all embodiments example. 基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。 Based on the embodiments of the present invention, all other embodiments of ordinary skill in the art without any creative effort shall fall within the scope of the present invention.

[0044] 本发明实施例提供一种信道探测的方法,该方法可以用于在一个基本服务集BSS组成的网络或者非基本服务集BSS组成的自组网络的MU-MMO场景中,该方法各步骤的执行主体可以是站点,具体在本实施例中由于该站点作为高吞吐率探测机制中的波束成形发起者(beamformer),故将该站点称为发送站点。 Provides a channel sounding procedure of [0044] the present invention, the method may be used in a MU-MMO scene ad-hoc network of a basic service set BSS consisting of a network or a non-basic service set BSS consisting of the methods of the step may be performed subject site, particularly in the present embodiment example, since the site as a high-throughput detection mechanisms beamforming initiator (the beamformer), it is referred to as the transmitting station site. 所述方法,如图3所示,包括: The method, shown in Figure 3, comprising:

[0045] S101、发送站点发送一个NDPA广播包,以通知该相关接收站点做探测准备; [0045] S101, the sending station transmits a broadcast packet NDPA to inform the relevant receiving station do probe preparation;

[0046] 通常情况下,对基本服务集构成的网络来说,Beamformer对应的物理设备为接入点(AP, Access Point) ,Beamformee对应的物理设备为站点(STA, Station);对非基本服务集的自组网络来说,Beamformer对应的物理设备可以为某个STA, Beamformee对应的物理设备可以为其他STA。 [0046] Typically, the network is composed of a basic service set, Beamformer corresponding physical device is an access point (AP, Access Point), Beamformee physical device corresponding to the site (STA, Station); non-basic services set for the ad hoc network, Beamformer corresponding physical device may be a STA, Beamformee corresponding physical device may be other STA. [0047] S102、发送站点继续发送一个空包NDP广播包,以使得相关接收站点收到NDP广播包后,计算各自相关的信道反馈信息; After the [0047] S102, the sending station continues to send an empty packet NDP broadcast packets, so that the associated receiving station receives broadcast packets NDP, calculate respective channel related feedback information;

[0048] S103、接收NDPA广播包中携带的第一个站点信息对应的接收站点所发送的信道反馈信息; [0048] S103, the first channel is a broadcast packet NDPA receiving station corresponding to the information carried in the receiving station the transmitted feedback information;

[0049] 从图2所示的NDPA广播包的帧格式中,可以看到NDPA广播包携带有n(n彡2)个站点信息(STA Information,可简写为STA Info),这就说明了该发送站点需要接收n个接收站点的信道反馈信息,且这n个接收站点和NDPA广播包所携带的n个STA Info 一一对应。 [0049] NDPA from the frame format of the broadcast packet shown in FIG. 2, can be seen NDPA broadcast packet carries n (n San 2) site information (STA Information, may be abbreviated as STA Info), which shows the n the sending station needs to receive the station received channel feedback information, and the receiving station and the n NDPA broadcast packets carried by the n STA info-one correspondence. 在本发明所有实施例中,将NDPA广播包中携带的第i (I彡i彡n)个STAInfo(即STAInfo i)对应的接收站点称为第i个接收站点;其中,i作为站点信息在NDPA广播包中的顺序编号。 In all embodiments of the present invention, the i-th (i San San the I n) NDPA carried in a broadcast packet STAInfo (i.e. STAInfo i) corresponding to the i-th receiving station is called a receiving station; wherein, as the site information in the i NDPA sequence number of broadcast packets. 具体的,每个接收站点都有一个连接身份号(Association Identity,以下简写为AID),且每个STA Info中包含一个AID ;若两者的AID —致,则两者相对应。 Specifically, each receiving station has a connection identification number (Association Identity, hereinafter abbreviated as AID of the), and each contains an AID of the STA Info; if both AID - induced, corresponding to both the.

[0050] 在此步骤中,NDPA广播包中携带的第一个站点信息对应的接收站点可以称为第一个接收站点;具体的,所述的第一个接收站点的是指接收站点的AID与接收到的NDPA广播包中的第一个STA Info (即STA Info I)字段中的AID相等的接收站点一致。 [0050] In this step, the NDPA packet carries broadcast station information corresponding to the first receiving station may be called a first reception station; Specifically, the first receiving station refers to the receiving station AID consistent with the AID equal to the field the receiving station to the received broadcast packet NDPA first STA Info (i.e., STA Info I). 第一个接收站点在接收到NDP广播包后,根据收到的NDP广播包做信道估计并由信道估计计算信道反馈信息,并不进入睡眠直到将此信道反馈信息发送给发送站点,使得此步骤中发送站点首先接收第一个接收站点的信道反馈信息。 A first receiving station after receiving the NDP broadcast packet, a broadcast packet received according to NDP do channel estimation by channel estimation calculation channel feedback information, does not enter sleep until this channel feedback information to the sending station, so that this step the sending station is first received in a receiving station of the first channel feedback information.

[0051] S104、按照NDPA广播包中站点信息排列顺序从前到后依次向其他接收站点发送反馈请求,以接收其他接收站点发送的信道反馈信息。 [0051] S104, information is sequentially sent in the order NDPA station broadcast packet from front to back to the feedback request the other receiving station, the receiving channel to receive the other station sends feedback information.

[0052] 所述NDPA广播包中站点信息排列顺序为上述n个站点信息的顺序。 [0052] The NDPA site information broadcast packets arranged in sequential order of the n site information. 所述其他站点是指除了第一个接收站点之外的接收站点,具体为第2个到第n个接收站点。 The other site is the site except the first receiving means at a receiving site, specifically, the second to n-th receiving station.

[0053] 此步骤具体为发送站点依次向第2个到第n个接收站点发送反馈请求,以接收这些接收站点的信道反馈信息。 [0053] This particular step successively transmits a feedback request to the second to n-th receiving station to the transmitting station to the receiving station receives channel feedback information. 在实际应用中,发送站点需要得到接收站点的信道反馈信息,但是,由于一些异常情况(例如未正确解析NDPA帧等等)的出现,也可能发送站点发送了反馈请求,但接收站点并未发送信道反馈信息给发送站点。 In practice, the sending station needs to be receiving station channel feedback information, however, due to some unusual circumstances (e.g. unresolved correctly NDPA frame etc.) occurs, the sending station may transmit the feedback request, but not receiving station transmits channel feedback information to the transmitting station.

[0054] 本发明实施例提供的信道探测的方法,发送站点在一个BSS组成的网络或者非基本服务集B SS组成的自组网络的MU-MMO场景中,发送一个NDPA广播包和NDP广播包后,接收NDPA广播包中携带的第一个站点信息对应的接收站点所发送的信道反馈信息;按照NDPA广播包中站点信息排列顺序从前到后依次向其他接收站点发送反馈请求,以接收其他接收站点发送的信道反馈信息。 [0054] The method of the channel provided by the probe embodiment of the present invention, MU-MMO scene ad-hoc network of the sending station in a network or a non-basic service set B SS a BSS composition consisting of, transmitting a NDPA broadcast packet and NDP broadcast packet after channel reception NDPA broadcast packet carries a first site of information corresponding to the receiving station sending the feedback information; aligned front to back sequentially transmitting the feedback request to the other receiving station according NDPA broadcast packets in the site to receive the other receivers site sends channel feedback information. 与现有技术中的发送站点随机向除第一个之外的其他接收站点发送反馈请求相比,除第一个之外的接收站点不必一直等待接收该反馈请求,而是进入睡眠直至到达预定的睡眠时间才唤醒自己以接收反馈请求;这样一来,可以在不影响接收反馈请求的情况下,尽可能多的减少接收站点的等待时间,进而达到省电的目的。 Feedback request sent at random as compared to the receiving station except the first one does not have to have been waiting to receive the feedback request, but enters the sleep prior art the sending station to the receiving station other than the other until reaching a first predetermined sleep time to wake up his request to receive feedback; as a result, it is possible without affecting receive feedback request, the waiting time as much as possible to reduce the receiving site, and then to save battery power.

[0055] 本发明实施例提供另一种信道探测的方法,该方法可以用于在一个基本服务集BSS组成的网络或者非基本服务集BSS组成的自组网络的MU-MMO场景中,该方法各步骤的执行主体可以是站点,具体在本实施例中由于该站点作为高吞吐率探测机制中的波束成形接收者(beamformee),故将该站点称为接收站点。 [0055] Another embodiment provides a method of the present invention, channel sounding, the method may be used in MU-MMO scene ad-hoc network of a basic service set BSS consisting of a network or a non-basic service set BSS consisting of the method execution subject of steps may be a site, particularly in the present embodiment example, since the site as a high-throughput detection mechanisms beamforming receiver (beamformees), it is referred to the site to the receiving site. 并且需要说明的是,由于第一个接收站点不进入睡眠,并立即向发送站点发送信道反馈信息,在整个信道探测的过程中,对于第一个接收站点而言与现有的方法相同;图4所示的方法适用于除第一个接收站点之外的其他接收站点。 And Note that, because the first receiving site does not go to sleep and immediately transmit the channel feedback information to the transmitting station, during the entire detection channel, the first receiving site for the same conventional method; FIG. the method shown in FIG. 4 is applied to the other receiving station other than the first receiving station. 也就是说,该方法的执行主体为第2个到第n个接收站点中的任一个。 That is, the execution subject method according to any one of the second to n-th receiving site. 所述方法如图4所示,包括: The method shown in Figure 4, comprising:

[0056] S201、接收发送站点所发送的NDPA广播包,做探测准备; [0056] S201, the receiving station transmits broadcast packets transmitted NDPA and do probe preparation;

[0057] S202、接收发送站点所发送的NDP广播包,并计算自身相关的信道反馈信息; [0057] S202, the receiving station transmits broadcast packets transmitted NDP, and calculates own associated channel feedback information;

[0058] 此步骤若依据现有技术可以为,接收发送站点所发送的NDP广播包,根据接收该NDP广播包做信道估计,并由信道估计计算自身相关的信道反馈信息。 [0058] If this step may be according to the prior art, NDP broadcast station receives the transmission packet transmitted based on the reception of the broadcast packet NDP do channel estimation, channel estimates calculated by the own associated channel feedback information.

[0059] S203、进入睡眠直至到达预定的睡眠时间时,唤醒自己,以接收发送站点发送的反馈请求; [0059] S203, when entering sleep until a predetermined time is reached sleep, wake themselves to send feedback request receiving site;

[0060] 其中,所述预定的睡眠时间可以是根据经验值得到的,并提前预先存储在接收站点中的,当然,也可以存储在其他设备的数据库中,在接收站点和发送站点刚建立连接之后,且进行S201之前,各个接收站点再从数据库中读取到预定的睡眠时间。 [0060] wherein the predetermined sleep time may be worthwhile to empirically, and stored in advance in the receiving station in advance, of course, may be stored in a database in another device, immediately establishing a connection the receiving station and the sending station before after, and S201 carried out, the respective receiving station from the database to re-read the predetermined sleep time. 但在本发明实施例中,对于如何得到预定的睡眠时间可以参照下面具体方法,该具体方法是在S201接收到NDPA广播包才进行的。 However, in the present embodiment of the invention, how to obtain a predetermined sleep time may refer to the following specific methods, the particular method is received at S201 NDPA broadcast packet only be carried out.

[0061] 这样一来,除第一个之外的接收站点可以根据预设的睡眠时间唤醒自己,使得其他接收站点不必一直等待接收该反馈请求,而是进入睡眠直至到达预定的睡眠时间才唤醒自己以接收反馈请求,从而,可以在不影响接收反馈请求的情况下,尽可能多的减少接收站点的等待时间,以达到省电的目的。 [0061] As a result, the receiving station except the first one can wake up his sleeping according to a preset time, so that other sites do not need to receive feedback has been waiting to receive the request, but goes to sleep until it reaches a predetermined sleep time to wake up themselves to receive the feedback request, so that, without affecting the case where the received feedback request, the waiting time as much as possible to reduce the receiving station, in order to save battery power.

[0062] S204、在接收到所述反馈请求后,向发送站点发送信道反馈信息。 [0062] S204, after receiving the feedback request, feedback information to the sending station transmits the channel.

[0063] 需要说明的是,本发明所有实施例中所述的反馈请求为波束成形报告查询(Beamforming Repot Poll)。 [0063] It should be noted that all of the feedback described in the Examples of the present invention, a beam shaping report request query (Beamforming Repot Poll).

[0064] 下面将详细阐述对于如何得到预定的睡眠时间的具体方法: [0064] The following will explain the specific method of how to get to the predetermined sleep time Details:

[0065] 若图4所示的方法的执行主体为NDPA广播包所记录的第二个站点信息对应的接收站点(即第二个接收站点),则在进行步骤S203时,预定的睡眠时间为一个短帧间距(Short Inter-Frame Space,可简写为SIFS)的时长。 [0065] When the execution subject method shown in FIG. 4 is a broadcast packet NDPA the recorded information corresponding to the second site receiving station (i.e., the second receiving station), then step S203 is performed when the predetermined sleep time a short inter-frame space (short Inter-frame Space, may be abbreviated as SIFS) time duration. 此预定的睡眠时间可以是预先存储在该第二个接收站点中的,当然,也可以是经过公式计算得到的。 The predetermined sleep time may be previously stored in the second receiving sites, of course, may be obtained through formula.

[0066] 若图4所示的方法的执行主体为NDPA广播包所记录的第三个或者其之后任一站点信息对应的接收站点,则如图5所示,在进入睡眠之前还包括,S205、根据波束成形报告查询的长度、对该波束成形报告查询进行编码调制的调制编码方案(Modulation andCoding Scheme,可简写为MCS)以及所述接收站点对应的站点信息在NDPA广播包中的顺序编号,计算出预定的睡眠时间。 [0066] When the execution subject method shown in FIG. 4 is a recorded broadcast packet NDPA third receiving station or any of its information corresponding to a site after the 5, further comprising before entering sleep, S205 the length of the report query beamforming, the beamforming report query is coded modulation modulation and coding scheme (modulation andCoding scheme, may be abbreviated as MCS) sequence number to the receiving site and the site information corresponding to the broadcast packet NDPA, calculated predetermined sleep time. 需要说明的是,执行步骤S205的顺序,不必按照图5所示的顺序。 Incidentally, the order of execution of step S205, not necessarily in the order shown in FIG. 5. 在本发明实施例中,只是强调步骤S205在步骤S203之前执行即可。 In an embodiment of the present invention, but stressed prior to performing step S205 to step S203. 例如,接收站点可以在步骤S201和步骤S202之间的SIFS执行S205 ;也可以在步骤S202和步骤S203之间的SIFS执行S205 ;当然在本发明实施例中也不排除S202和S205同时进行的情况。 For example, SIFS the receiving station may perform steps S201 and S205 between step S202; SIFS may be performed between steps S202 and S205 in step S203; of course, in embodiments of the present invention does not exclude the case where S202 and S205 simultaneously .

[0067] 其中,根据现有技术,波束成形报告查询的帧结构为已知的,故其长度也是已知的。 Frame structure [0067] wherein, according to the prior art beamforming report queries are known, so the length is also known. 另外,所述调制编码方案可以是图5所示方法的执行主体(第三个或者其之后任一站点信息对应的接收站点)根据信道状况预估得到的,且调制编码方案包括:编码速率和调制速率。 Further, the modulation and coding scheme may be performed subject method shown in FIG. 5 (a third receiving site, or any information corresponding to a station after) obtained according to the estimated channel condition, and a modulation coding scheme comprises: coding rate and modulation rate.

[0068] 其中,如图6所示,步骤S205可以包括: [0068] wherein, as shown in FIG. 6, step S205 may include:

[0069] S2051、根据波束成形报告查询的长度和调制编码方案中的编码方式确定编码后波束成形报告查询的长度; [0069] S2051, according to the length of the coding and modulation coding schemes query report in determining the beamforming beam length coding shaping report query;

[0070] 示例性的,根据波束成形报告查询的长度L_data和调制编码方式中编码速率Cr (最高阶的MCS编码速率)确定编码后波束成形报告查询的长度L_CodeData : [0070] Exemplary, determining the beamforming length encoded according to the modulation and coding scheme L_data report query encoding rate Cr (MCS coding rate of the highest-order) beam forming L_CodeData length report query:

[0071] L_codeData = L_data/Cr+tailbit [0071] L_codeData = L_data / Cr + tailbit

[0072] 其中,编码速率Cr可以是实际预估到的值,或比实际预估得到的值略大些;tailbit为BCC编码使延时寄存器归零的尾比特。 [0072] wherein Cr may be the actual coding rate to the estimated value, obtained, or slightly larger than the actual estimate; tailbit delay register to enable BCC encoder zero tail bits.

[0073] S2052、根据编码后波束成形报告查询的长度和调制编码方案中的调制方式确定调制后波束成形报告查询的长度; [0073] S2052, encoded according to the determined length of the modulated beam forming query report length modulation scheme and a modulation coding scheme beamforming in the report query;

[0074] 其中调制方式一般包括:二相相移键控(Binary phase shift keying,可以简写为BPSK)、四相移键控(Quadrature phase shift keying,可以简写为QPSK)、正交幅度调制(Quadrature Amplitude Modulation,可以简写为QAM, QAM 分为64QAM、256QAM)且各种调制方式对应的调制速率分别为:BPSK为lbit/symbol ;QPSK为2bit/symbol ;16QAM为4bit/symbol ;64QAM 为6bit/symbol ;256QAM 为8bit/symbol) [0074] wherein the modulation scheme generally includes: binary phase shift keying (Binary phase shift keying, can be abbreviated as BPSK), quadrature phase shift keying (Quadrature phase shift keying, can be abbreviated as QPSK), quadrature amplitude modulation (Quadrature Amplitude modulation, may be abbreviated as QAM, QAM divided 64QAM, 256QAM) and a variety of corresponding modulation rate of the modulation scheme are: BPSK is lbit / symbol; QPSK is 2bit / symbol; 16QAM as 4bit / symbol; 64QAM is 6bit / symbol ; the 256QAM is 8bit / symbol)

[0075] 示例性的,此步骤可以为根据上述编码后波束成形报告查询的长和调制速率M计算调制后的数据长度L_modulatedData = L_codeData/M。 [0075] Exemplary, this step may be according to the length of the encoded data and modulates the beamformed long query report modulation rate M calculated L_modulatedData = L_codeData / M.

[0076] S2053、根据调制后波束成形报告查询的长度和正交频分复用(Orthogonalfrequency division multiplexing,简称0FDM)符号的数据子载波个数确定调制后波束成形报告查询的OFDM符号数; Orthogonal to the length and [0076] S2053, the modulated beam forming according to the report query frequency division multiplexing (Orthogonalfrequency division multiplexing, referred 0FDM) number of OFDM symbols beamforming report query data after determining the number of sub-carrier modulated symbol;

[0077] 示例性的,根据上述调制后的数据长度L_modulatedData和OFDM符号数据子载波个数N_data 计算符号数N_sym = L_modulatedData/N_data。 [0077] Exemplary, after the data length of the OFDM symbols modulated L_modulatedData and the number of data subcarriers N_data calculating the number of symbols N_sym = L_modulatedData / N_data.

[0078] S2054、由调制后波束成形报告查询的OFDM符号数和物理层包头部分的帧结构计算出发送所述调制后波束成形报告查询所需的最短时间; [0078] S2054, the modulated beam forming query report the number of OFDM symbols and the header portion of the frame structure of a physical layer reports the calculated beamforming query minimum required time after transmitting said modulated;

[0079] 具体的,如图7所示,计算发送所述调制后波束成形报告查询所需的最短时间minTbrp = 8+8+4+8+4+4+4+4XN_sym = 44+4XN_sym(us),其中发送I 个OFDM 符号所需要的时间为4us,而且调制速率选择最高阶的MCS。 [0079] Specifically, as shown, after calculating the transmission of the modulated beam 7 forming the minimum time required reporting query minTbrp = 8 + 8 + 4 + 8 + 4 + 4 + 4 + 4XN_sym = 44 + 4XN_sym (us ), where I transmitted OFDM symbols in the time required for the 4us, and the highest order modulation rate selected MCS.

[0080] S2055、根据公式STi = Tsifs+(i_2) * (2*TSIFS+minTfcp),得到预定的睡眠时间。 [0080] S2055, according to the formula STi = Tsifs + (i_2) * (2 * TSIFS + minTfcp), to give a predetermined sleep time.

[0081] 需要说明的是,公式STi = Tsifs+ (1-2)*(2*TSIFS+minTbrp)可以根据图1所示得出;其中,STi表示NDPA广播包所记录的第i个站点信息对应的接收站点的预定的睡眠时间,其中i > 3 ;Tsifs表示一个SIFS的时长^inTfcp表示所述发送所述调制后波束成形报告查询所需的最短时间。 [0081] Incidentally, the formula STi = Tsifs + (1-2) * (2 * TSIFS + minTbrp) can be obtained as shown in FIG. 1 according; wherein, STi represents NDPA recorded broadcast packet information corresponding to the i th site predetermined sleep time receiving station, where i> 3; Tsifs represents a SIFS time duration represented beamforming ^ inTfcp query report after the minimum time required to transmit the modulation.

[0082] 本发明实施例提供的信道探测的方法,使得除第一个之外的接收站点不必一直等待接收该反馈请求,而是进入睡眠直至到达预定的睡眠时间才唤醒自己以接收反馈请求;这样一来,可以在不影响接收反馈请求的情况下,尽可能多的减少接收站点的等待时间,进而达到省电的目的。 [0082] The method provided by the detection channel embodiment of the present invention, so that the receiving station except the first one does not have to have been waiting to receive the feedback request, but enters the sleep until a predetermined time is reached before the sleep wake himself to receive the feedback request; Thus, it is possible without affecting the received feedback request, the waiting time as much as possible to reduce the receiving station, and thus to save battery power.

[0083] 综上可述,本发明是在图1的基础上完成的信道探测,本发明实施例具体包括:在一个B SS组成的网络或者非基本服务集BSS组成的自组网络的MU-MMO场景中,发送站点(beamformer)先向所有相关的接收站点(beamformee)发送一个NDPA广播包;接收站点在接收到NDPA广播包后做好探测准备;发送站点继续发送NDP广播包;接收站点在接收到NDP广播包后,完成各自相关的信道反馈信息的计算;随后第一个接收站点(beamformeeI,其对应于NDPA的第一个STA Info字段)立即向发送站点发送自身的信道反馈信息,而除了第一个接收站点之外的其他接收站点都进入睡眠,当然,此时的其他接收站点已经获得自身预定的睡眠时间;之后,发送站点按照NDPA广播包中站点信息排列顺序从前到后依次向所述其他接收站点发送反馈请求,相应的,所述其他接收站点中的每一个都在其自身预 [0083] In summary may be described, the present invention has been accomplished on the basis of FIG. 1 on channel sounding, embodiments of the present invention comprises: MU- ad hoc network in a B SS composed of a network or a non-basic service set BSS consisting of MMO scene, the sending station (beamformer) (beamformee) Xianxiang sent all relevant broadcast NDPA receiving station a packet; receiving site ready to do the probe after receiving the NDPA broadcast packet; sending site NDP continue to send broadcast packets; receiving site after receiving the NDP broadcast packet, the completion of the respective associated channel feedback calculation information; then a first receiving site (beamformeeI, which corresponds to NDPA first STA info fields) immediately transmits its channel feedback information to the transmitting station, and in addition to other than the first receiving station receiving sites into sleep, of course, at this time the receiving station has received other own predetermined sleep time; after sending station site information broadcast packet according NDPA from front to rear order in order to the other receiving station sends a feedback request, correspondingly, the other receiving station in each of its own pre- 定的睡眠时间到达之时,唤醒自己,以接收到反馈请求,并在接收反馈请求后向发送站点发送自身相关的信道反馈信息。 When the predetermined sleep time arrival, wake themselves to the received feedback request, and sends its own channel feedback information related to the sending station after receiving the feedback request.

[0084] 与现有技术相比,本发明实施例中的方法,由发送站点按顺序发送反馈请求就为接收站点可以有预定的睡眠时间提供了条件;接收站点而言在预定的睡眠时间内可以处于睡眠状态,在预定的睡眠时间到达时唤醒自己,这样既不影响系统的正常工作,又使得接收站点尽可能多的减少等待时间,从而达到省电的目的。 [0084] Compared with the prior art, the method in the embodiment of the present invention, transmitted by the transmitting station in order to receive feedback on the site can request a predetermined sleep time provides conditions; in terms of the receiving station within a predetermined sleep time may be in a sleep state, wake up his sleeping when the predetermined time is reached, this will not affect the normal operation of the system, but also makes the receiving site as much as possible to reduce the waiting time, so as to save battery power.

[0085] 本发明实施例提供一种站点40,具体在本实施例中由于该站点作为高吞吐率探测机制中的波束成形发送者(beamformer),故将该站点称为发送站点。 Example 40 provides a site [0085] The present invention, in this particular embodiment since the site as a high-throughput detection mechanisms beamforming sender (the beamformer), it is referred to as the transmitting station site. 该站点40为发送站点,与上述图4所示的方法相对应。 The transmitting station 40 is a station, the method shown in FIG. 4, respectively. 如图8所示,所述站点40包括: 8, the station 40 comprises:

[0086] NDPA广播包发送单元401,用于发送一个NDPA广播包,以通知所有相关接收站点做探测准备; [0086] NDPA broadcast packet transmission unit 401 for transmitting a broadcast packet NDPA to notify the receiving station do all probe preparation;

[0087] 通常情况下,对基本服务集构成的网络来说,Beamformer对应的物理设备为接入点(AP, Access Point) ,Beamformee对应的物理设备为站点(STA, Station);对非基本服务集的自组网络来说,Beamformer对应的物理设备可以为某个STA, Beamformee对应的物理设备可以为其他STA。 [0087] Typically, the network is composed of a basic service set, Beamformer corresponding physical device is an access point (AP, Access Point), Beamformee physical device corresponding to the site (STA, Station); non-basic services set for the ad hoc network, Beamformer corresponding physical device may be a STA, Beamformee corresponding physical device may be other STA.

[0088] NDP广播包发送单元402,用于继续发送一个空包NDP广播包,以使得相关接收站点收到NDP广播包后,计算各自相关的信道反馈信息; After [0088] NDP broadcast packet transmission unit 402 is configured to continue to send a null packet NDP broadcast packets, so that the associated receiving station receives broadcast packets NDP, calculate respective channel related feedback information;

[0089] 第一信道反馈信息接收单元403,用于接收NDPA广播包中携带的第一个接收站点信息对应的接收站点所发送的信道反馈信息; [0089] The first channel feedback information reception unit 403, a channel for receiving a broadcast packet carries NDPA first reception station site information corresponding to the received feedback information transmitted;

[0090] 从图2所示的NDPA广播包的帧格式中,可以看到NDPA广播包携带有n(n彡2)个站点信息(STA Information,可简写为STA Info),这就说明了该发送站点需要接收n个接收站点的信道反馈信息,且这n个接收站点和NDPA广播包所携带的n个STA Info 一一对应。 [0090] NDPA from the frame format of the broadcast packet shown in FIG. 2, can be seen NDPA broadcast packet carries n (n San 2) site information (STA Information, may be abbreviated as STA Info), which shows the n the sending station needs to receive the station received channel feedback information, and the receiving station and the n NDPA broadcast packets carried by the n STA info-one correspondence. 在本发明所有实施例中,将NDPA广播包中携带的第i (I彡i彡n)个STAInfo(即STAInfo i)对应的接收站点称为第i个接收站点;其中,i作为站点信息在NDPA广播包中的顺序编号。 In all embodiments of the present invention, the i-th (i San San the I n) NDPA carried in a broadcast packet STAInfo (i.e. STAInfo i) corresponding to the i-th receiving station is called a receiving station; wherein, as the site information in the i NDPA sequence number of broadcast packets. 具体的,每个接收站点都有一个连接身份号(Association ID,以下简写为AID),且每个STA Info中包含一个AID ;若两者的AID —致,则两者相对应。 Specifically, each receiving station has a connection identification number (Association ID, hereinafter abbreviated as AID of the), and each contains an AID of the STA Info; if both AID - induced, corresponding to both the.

[0091] 在此单元中,NDPA广播包中携带的第一个站点信息对应的接收站点可以称为第一个接收站点;具体的,所述的第一个接收站点的是指接收站点的AID与接收到的NDPA广播包中的第一个STA Info (即STA Info I)字段中的AID相等的接收站点一致。 [0091] In this unit, the NDPA packet carries broadcast station information corresponding to the first receiving station may be called a first reception station; Specifically, the first receiving station refers to the receiving station AID consistent with the AID equal to the field the receiving station to the received broadcast packet NDPA first STA Info (i.e., STA Info I). 第一个接收站点在接收到NDP广播包后,根据收到的NDP广播包做信道估计并由信道估计计算信道反馈信息,直到将此信道反馈信息发送给发送站点,使得发送站点首先接收第一个接收站点的信道反馈信息。 A first receiving station after receiving the NDP broadcast packet, a broadcast packet received according to NDP do channel estimation by channel estimation channel feedback information calculation, until this channel feedback information to the transmitting station, so that the sending station first receives a first a receiving station channel feedback information.

[0092] 第二信道反馈信息接收单元404,用于按照NDPA广播包中站点信息排列顺序依次向其他接收站点发送反馈请求,以接收其他接收站点发送的信道反馈信息。 [0092] The second channel feedback information reception unit 404, the order information for sequentially transmitting feedback requests to other broadcast packet receiving station in accordance NDPA site channel to receive other feedback information sent by the receiving station.

[0093] 所述NDPA广播包中站点信息排列顺序为上述n个站点信息的顺序。 [0093] The NDPA site information broadcast packets arranged in sequential order of the n site information. 所述其他站点是指除了第一个接收站点之外的接收站点,具体为第2个到第n个接收站点。 The other site is the site except the first receiving means at a receiving site, specifically, the second to n-th receiving station.

[0094] 需要说明的是,发送站点依次向第2个到第n个接收站点发送反馈请求,以接收这些接收站点的信道反馈信息。 [0094] Incidentally, sequentially transmitting station transmits a feedback request to the second to n-th receiving station to the receiving station receives channel feedback information. 在实际应用中,发送站点需要得到接收站点的信道反馈信息,但是,由于一些异常情况(例如未正确解析NDPA帧等等)的出现,也可能发送站点发送了反馈请求,但接收站点并未发送信道反馈信息给发送站点。 In practice, the sending station needs to be receiving station channel feedback information, however, due to some unusual circumstances (e.g. unresolved correctly NDPA frame etc.) occurs, the sending station may transmit the feedback request, but not receiving station transmits channel feedback information to the transmitting station.

[0095] 本发明实施例提供的站点,其中发送站点在一个BSS组成的网络或者非基本服务集B SS组成的自组网络的MU-MMO场景中,发送一个NDPA广播包和NDP广播包后,接收NDPA广播包中携带的第一个站点信息对应的接收站点所发送的信道反馈信息;按照NDPA广播包中站点信息排列顺序从前到后依次向其他接收站点发送反馈请求,以接收其他接收站点发送的信道反馈信息。 [0095] MU-MMO scene ad-hoc network of sites according to an embodiment of the present invention, wherein the sending station in a network BSS composition or a non-basic service sets B SS consisting transmitted after a NDPA broadcast packet and NDP broadcast packet, receiving NDPA broadcast packet channel carries first site information corresponding to the receiving station sending the feedback information; aligned front to back sequentially transmitting the feedback request to the other receiving station according NDPA broadcast packet station, transmitting to receiving the other receiving station the channel feedback information. 与现有技术中的发送站点随机向除第一个之外的其他接收站点 The prior art random sending station to the receiving station, among other beyond the first

发送反馈请求相比,除第一个之外的接收站点不必一直等待接收该反馈请求,而是进入睡眠直至到达预定的睡眠时间才唤醒自己以接收反馈请求;这样一来,可以在不影响接收反馈请求的情况下,尽可能多的减少接收站点的等待时间,进而达到省电的目的。 Send feedback request compared to the receiving station except the first one need not have been waiting to receive the feedback request, but goes to sleep until the scheduled time is reached before sleep wake up his request to receive feedback; this way, can not affect the reception in case the feedback request, the waiting time as much as possible to reduce the receiving station, and thus to save battery power.

[0096] 本发明实施例提供另一种站点50,具体在本实施例中由于该站点作为高吞吐率探测机制中的波束成形接收者(beamformee),故将该站点称为接收站点。 [0096] Example embodiments of the present invention to provide a further station 50, in this particular embodiment since the site as a high-throughput detection mechanisms beamforming receiver (beamformees), it is referred to the site to the receiving site. 并且需要说明的是,由于第一个接收站点不进入睡眠,并立即向发送站点发送信道反馈信息,在整个信道探测的过程中,对于第一个接收站点而言与现有的方法相同;图9所示的站点50方法适用于除第一个接收站点之外的其他接收站点。 And Note that, because the first receiving site does not go to sleep and immediately transmit the channel feedback information to the transmitting station, during the entire detection channel, the first receiving site for the same conventional method; FIG. the method of site 50 shown in Figure 9 applies to the other receiving station other than the first receiving station. 也就是说,该方法站点50的执行主体为第2个到第n个接收站点中的任一个。 That is, execution of the method subject of any of a station 50 for the second through n-th reception site. 所述方法站点50如图9所示,包括: The method of site 50 shown in Figure 9, comprising:

[0097] NDPA广播包接收单元501,用于接收发送站点所发送的NDPA广播包,做探测准备; [0097] NDPA broadcast packet receiving unit 501, a broadcast packet received NDPA transmitted by the sending station, to make the probe preparation;

[0098] NDP广播包接收单元502,用于接收发送站点所发送的NDP广播包,并计算自身相关的信道反馈信息; [0098] NDP broadcast packet receiving unit 502, for receiving a broadcast packet transmitting station NDP transmitted, and calculates the own associated channel feedback information;

[0099] 该NDP广播包接收单元502具体用于接收发送站点所发送的NDP广播包,根据接收该NDP广播包做信道估计,并由信道估计计算自身相关的信道反馈信息。 [0099] The NDP broadcast packet receiving unit 502 is specifically configured NDP broadcast station receives the transmission packet transmitted, do channel estimation NDP receiving the broadcast packet, channel estimates calculated by the own associated channel feedback information.

[0100] 唤醒单元503,用于进入睡眠直至到达预定的睡眠时间时,唤醒自己,以等待接收发送站点发送的反馈请求; [0100] wakeup unit 503, for entering a sleep until a predetermined time is reached sleep, wake themselves to wait to receive a request sent by the transmitting station feedback;

[0101] 这样一来,除第一个之外的接收站点可以根据预设的睡眠时间唤醒自己,使得其他接收站点不必一直等待接收该反馈请求,而是进入睡眠直至到达预定的睡眠时间才唤醒自己以接收反馈请求,从而,可以在不影响接收反馈请求的情况下,尽可能多的减少接收站点的等待时间,以达到省电的目的。 [0101] As a result, the receiving station except the first one can wake up his sleeping according to a preset time, so that other sites do not need to receive feedback has been waiting to receive the request, but goes to sleep until it reaches a predetermined sleep time to wake up themselves to receive the feedback request, so that, without affecting the case where the received feedback request, the waiting time as much as possible to reduce the receiving station, in order to save battery power.

[0102] 反馈信息发送单元504,用于在接收到反馈请求后,向发送站点发送信道反馈信肩、O [0102] feedback information transmission unit 504, after receiving a feedback request, the feedback channel to transmit the channel to the sending station shoulder, O

[0103] 需要说明的是,本发明所有实施例中所述的反馈请求为波束成形报告查询(Beamforming Repot Poll) [0103] Incidentally, the present invention is described in the examples all the feedback request as a query report beamforming (Beamforming Repot Poll)

[0104] 进一步的,若图9所示的站点为NDPA广播包所记录的第二个站点信息对应的接收站点(即第二个接收站点),则在唤醒单元503中预定的睡眠时间为一个短帧间距SIFS的时长。 [0104] Further, when the station shown in FIG. 9 is a broadcast packet recorded NDPA second site information corresponding to the receiving station (i.e., the second receiving station), the wakeup unit 503 to a predetermined sleep time SIFS is shorter pitch length of the frame.

[0105] 若图9所示的站点为NDPA广播包所记录的第三个或者其之后任一站点信息对应的接收站点,则如图10所示,站点50还包括睡眠时间计算单元505,用于根据波束成形报告查询的长度、对该波束成形报告查询进行编码调制的调制编码方案以及所述接收站点对应的站点信息在NDPA广播包中的顺序编号,计算出预定的睡眠时间。 [0105] If the station shown in FIG. 9 is a broadcast packet NDPA recorded third information or any site which after receiving the corresponding sites, shown in Figure 10, station 50 further includes a sleep time calculation unit 505, with according to the report query length beamforming, the beamforming report queries modulation code modulation coding scheme and the receiving station site information corresponding to the sequence number of the broadcast packets NDPA calculated predetermined sleep time.

[0106] 其中,根据现有技术,波束成形报告查询的帧结构为已知的,故其长度也是已知的。 Frame structure [0106] wherein, according to the prior art beamforming report queries are known, so the length is also known. 另外,所述调制编码方案可以是图10站点(第三个或者其之后任一站点信息对应的接收站点)根据信道状况预估得到的,且调制编码方案包括:编码速率和调制速率。 Further, the modulation and coding scheme may be the site of FIG. 10 (third or any site which, after information corresponding to the receiving station) according to estimated channel conditions obtained, and the modulation coding scheme comprises: coding rate and modulation rate.

[0107] 其中,睡眠时间计算单元505可以包括: [0107] wherein the sleep time calculation unit 505 may include:

[0108] 编码后长度计算模块5051,用于根据波束成形报告查询的长度和调制编码方案中的编码方式确定编码后波束成形报告查询的长度; [0108] The length coded calculation module 5051 for determining the beamforming query report length coding and modulation coding schemes in accordance with the report of the inquiry beamforming coding method;

[0109] 调制后长度计算模块5052,用于根据编码后波束成形报告查询的长度和调制编码方案中的调制方式确定调制后波束成形报告查询的长度; [0110] OFDM符号数计算模块5053,用于根据调制后波束成形报告查询的长度和正交频分复用OFDM符号的数据子载波个数确定调制后波束成形报告查询的OFDM符号数; Length modulation scheme and a modulation coding scheme [0109] After calculating the length of a modulation module 5052, a report based on the beamforming query encoded in the modulated beam to determine the length of the former report query; [0110] OFDM symbols calculation module 5053, with the length and modulated in quadrature beamforming query report the number of frequency division multiplexing (OFDM) symbols after the data subcarriers modulated beam determined number of OFDM symbols forming the report query;

[0111] 最短时间计算模块5054,用于由调制后波束成形报告查询的OFDM符号数和物理层包头部分的帧结构计算出发送调制后波束成形报告查询所需的最短时间; [0111] The minimum time calculating module 5054, the minimum time for beamforming report the number of OFDM symbols after the header portion of the frame structure and the physical layer by the beam shaping report query modulated transmission modulation calculate the desired query;

[0112] 睡眠时间计算模块5055,用于根据公式STi = Tsifs+(1-2)*(2*TSIFS+minTbip),得到预定的睡眠时间;其中,STi表示NDPA广播包所记录的第i个站点信息对应的接收站点的预定的睡眠时间,其中i > 3 ;TSIFS表示一个SIFS的时长;minTbip表示所述发送所述调制后波束成形报告查询所需的最短时间。 [0112] Sleep time calculating module 5055, according to the formula STi = Tsifs + (1-2) * (2 * TSIFS + minTbip), to give a predetermined sleep period; wherein, a broadcast packet NDPA STi represents the i-th recording site information corresponding to the predetermined sleep time receiving station, where i> 3; TSIFS denotes the duration of a SIFS; minTbip represents beamforming query report after the minimum time required to transmit the modulation.

[0113] 本发明实施例提供的接收站点,使得除第一个之外的接收站点不必一直等待接收该反馈请求,而是进入睡眠直至到达预定的睡眠时间才唤醒自己以接收反馈请求;这样一来,可以在不影响接收反馈请求的情况下,尽可能多的减少接收站点的等待时间,进而达到省电的目的。 [0113] a receiving station according to an embodiment of the present invention, so that the receiving station except the first one does not have to have been waiting to receive the feedback request, but enters the sleep until reaching a predetermined sleep time to wake up to receive their feedback request; such a to, may be made without affecting the received feedback request, the waiting time as much as possible to reduce the receiving station, and thus to save battery power.

[0114] 本发明实施例提供的无线通信系统,包括:发送站点以及至少两个接收站点:发送站点为上述站点40 ;至少两个接收站点中除第一个接收站点之外的接收站点均为上述站点50。 [0114] embodiment of the present invention to provide a wireless communication system, comprising: at least two transmitting station and the receiving station: transmitting site for site 40 above; at least two receiving sites receiving station other than the first station are received 50 above site.

[0115] 本发明实施例提供的无线通信系统,发送站点向接收站点发送NDPA广播包和NDP广播包,发送站点按照NDPA广播包中站点信息排列顺序从前到后依次向除第一个站点之外的其他站点发送反馈请求;当接收站点接收到NDP广播包后,根据NDP广播包记录的信息计算信道反馈信息,第一接收站点计算完成后发送信道反馈信息,而其他接收站点计算完反馈信息后,需要根据NDPA广播包计算自己的睡眠时间,以便进入睡眠状态,直至到达预订的睡眠时间才唤醒自己。 [0115] After the wireless communication system according to an embodiment of the present invention, the transmitting station sends a broadcast packet NDPA NDP and broadcast packets to the receiving station, the transmitting station in accordance NDPA broadcast packet to the station information sequentially in the order from the front to the outside of the first site in addition other site sends a feedback request; after receiving station receives NDP broadcast packet, the feedback information according to information calculating channel NDP broadcast packet recording, transmission channel feedback information after the first reception station calculated, while the other receiving station to complete the feedback information calculation , broadcast package needs to be calculated based on NDPA their sleep time in order to go to sleep, only to wake up his sleeping until the time of reservation reach. 这样一来,可以使接收站点尽可能多的减少等待时间,从而达到省电的目的。 Thus, the reception station can reduce the waiting time as much as possible, so as to save battery power.

[0116] 本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:R0M、RAM、磁碟或者光盘等各种可以存储程序代码的介质。 [0116] Those of ordinary skill in the art will be understood: the hardware implementing the above method can be accomplished by a program instructing relevant to all or part of the steps embodiment, the program may be stored in a computer readable storage medium, the program execution when, comprising the step of performing the above-described embodiment of the method; and the storage medium comprising: a variety of medium may store program codes R0M, RAM, magnetic disk, or optical disk.

[0117] 以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。 [0117] The above are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, any skilled in the art in the art within the technical scope of the present invention is disclosed, variations may readily occur or Alternatively, it shall fall within the protection scope of the present invention. 因此,本发明的保护范围应以所述权利要求的保护范围为准。 Accordingly, the scope of the present invention should be defined by the scope of the claims.

Claims (13)

  1. 1. 一种信道探测的方法,其特征在于,包括: 发送一个空包通知NDPA广播包,以通知相关接收站点做探测准备; 继续发送一个空包NDP广播包,以使得相关接收站点收到NDP广播包后,计算各自相关的信道反馈信息; 接收所述NDPA广播包中携带的第一个站点信息对应的接收站点所发送的信道反馈信息; 按照所述NDPA广播包中站点信息排列顺序从前到后依次向其他接收站点发送反馈请求,以接收所述其他接收站点发送的信道反馈信息。 1. A method for channel sounding, characterized by comprising: transmitting a notification NDPA empty packet broadcast packet to notify the receiving station do probe preparation; NDP continues to send an empty packet broadcast packets, so that the receiving station receives the relevant NDP after the broadcast packet, calculate respective channel feedback information associated; NDPA channel receiving said first broadcast packet in a site corresponding to the information carried in the receiving station the transmitted feedback information; NDPA broadcast packet in accordance with said information in the order from the front to the site after sequentially transmitted feedback request to the other receiving station, a channel to receive the other receiving station sends feedback information.
  2. 2. 一种信道探测的方法,其特征在于,包括: 接收发送站点所发送的NDPA广播包,做探测准备; 接收发送站点所发送的NDP广播包,并计算自身相关的信道反馈信息; 进入睡眠直至到达预定的睡眠时间时,唤醒自己,以接收发送站点发送的反馈请求; 在接收到所述反馈请求后,向所述发送站点发送所述信道反馈信息。 2. A method for channel sounding, characterized by comprising: NDPA broadcast packets received transmitting station transmitted, do probe preparation; the NDP packet radio transmitting and receiving station are transmitted, and calculating own associated channel feedback information; into sleep until the time reaches the predetermined sleep time, wake themselves, to receive feedback request sent by the transmitting station; feedback after receiving the request, the transmitting station to transmit the channel feedback information.
  3. 3.根据权利要求2所述的方法,其特征在于,所述反馈请求为波束成形报告查询。 3. The method according to claim 2, wherein said feedback report request is a query beamforming.
  4. 4.根据权利要求3所述的方法,其特征在于,若接收站点为NDPA广播包所记录的第二个站点信息对应的接收站点,则所述预定的睡眠时间为一个短帧间距SIFS的时长。 4. The method according to claim 3, wherein, if the received broadcast packet NDPA site for a second site recorded information corresponding to the receiving station, then the predetermined sleep time is a short inter-frame space SIFS long .
  5. 5.根据权利要求3所述的方法,其特征在于,若接收站点为NDPA广播包所记录的第三个或者其之后任一站点信息对应的接收站点,则在进入睡眠之前还包括: 根据所述波束成形报告查询的长度、对该波束成形报告查询进行编码调制的调制编码方案以及所述接收站点对应的站点信息在NDPA广播包中的顺序编号,计算出所述预定的睡眠时间。 The method according to claim 3, wherein, when the receiving station NDPA recorded broadcast packet, or any of the third information corresponding to the site after a receiving station, prior to entering the sleep further comprising: based on the the length of said report query beamforming, the beamforming report queries modulation code modulation coding scheme and the receiving station site information corresponding to the sequence number of the broadcast packets NDPA, calculating the predetermined sleep time.
  6. 6.根据权利要求5所述的方法,其特征在于,根据所述波束成形报告查询的长度和对该波束成形报告查询进行编码调制的调制编码方案,计算出所述预定的睡眠时间包括: 根据所述波束成形报告查询的长度和所述调制编码方案中的编码方式确定编码后波束成形报告查询的长度; 根据所述编码后波束成形报告查询的长度和所述调制编码方案中的调制方式确定调制后波束成形报告查询的长度; 根据所述调制后波束成形报告查询的长度和正交频分复用OFDM符号的数据子载波个数确定所述调制后波束成形报告查询的OFDM符号数; 由所述调制后波束成形报告查询的OFDM符号数和物理层包头部分的帧结构计算出发送所述调制后波束成形报告查询所需的最短时间; 根据公式STi = Tsifs+α-2)*(2*Ί^+πΰηΤ_),得到预定的睡眠时间;其中,STi表示NDPA广播包所记录的第i个站点 6. The method according to claim 5, characterized in that the length of the query report according to the beamforming and modulation coding scheme of the coded modulation queries beamforming report, calculating the predetermined sleep time comprising: the length coding method and the modulation coding scheme reports the beamforming beamforming query report query after determining the coding length; length, the modulation mode and the modulation coding scheme beamforming query report in accordance with the encoded after beamforming report query modulated length; according to the length of the modulation and quadrature beamforming query report frequency division multiplexing (OFDM) symbol number of data subcarriers is determined after the number of OFDM symbols forming the modulated beam report query; the beamforming query report after the modulation of the OFDM symbols and the header portion of the frame structure of a physical layer to calculate the shortest time after sending the report beamforming desired query modulation; according to the formula STi = Tsifs + α-2) * (2 * Ί ^ + πΰηΤ_), to give a predetermined sleep period; wherein, STi NDPA broadcast packet represents the i-th recording site 息对应的接收站点的预定的睡眠时间,其中i > 3 ;Tsifs表不一个SIFS的时长;minTtep表不所述发送所述调制后波束成形报告查询所需的最短时间。 Information corresponding to the predetermined sleep time receiving station, where i> 3; when a SIFS Tsifs table is not long; beamforming report queries the minimum required time after the sending the minTtep table is not modulated.
  7. 7. 一种站点,其特征在于,包括: NDPA广播包发送单元,用于发送一个空包通知NDPA广播包,以通知该所有相关接收站点做探测准备; NDP广播包发送单元,用于继续发送一个空包NDP广播包,以使得相关接收站点收到NDP广播包后,计算各自相关的信道反馈信息;第一信道反馈信息接收单元,用于接收所述NDPA广播包中携带的第一个站点信息对应的接收站点所发送的信道反馈信息;第二信道反馈信息接收单元,用于按照所述NDPA广播包中站点信息排列顺序从前到后依次向其他接收站点发送反馈请求,以接收所述其他接收站点发送的信道反馈信息。 A site, characterized by comprising: a broadcast NDPA packet sending unit, configured to send a notification NDPA empty packet broadcast packet to notify the receiving station do all probe preparation; the NDP broadcast packet transmitting unit for transmitting to continue after an empty packet NDP broadcast packets, so that the associated receiving station receives broadcast packets NDP, calculate respective channel related feedback information; receiving a first channel information feedback unit, a station for receiving said first broadcast packet carried NDPA corresponding to the channel information transmitted by the receiving station feedback information; and a second feedback channel information receiving unit for sequentially sending requests to other feedback information receiving station are arranged front to back in accordance with the broadcast packet NDPA site, to receive the additional the receiving station transmits the channel feedback information.
  8. 8. 一种站点,其特征在于,包括:NDPA广播包接收单元,用于接收发送站点所发送的NDPA广播包,做探测准备;NDP广播包接收单元,用于接收发送站点所发送的NDP广播包,并计算自身相关的信道反馈信息;唤醒单元,用于进入睡眠直至到达预定的睡眠时间时,唤醒自己,以接收发送站点发送的反馈请求;反馈信息发送单元,用于在接收到所述反馈请求后,向所述发送站点发送所述信道反馈信息。 A site, characterized by comprising: a broadcast NDPA packet receiving unit, for receiving a broadcast packet transmitting station NDPA transmitted, do probe preparation; NDP broadcast packet receiving unit, for receiving a broadcast transmitting station NDP transmitted packet, and calculates own associated channel feedback information; wakeup unit, for entering a sleep until a predetermined time is reached sleep, wake themselves, to receive feedback request transmitted by the transmitting station; feedback information transmitting means for receiving the after the feedback request, the sending station sends the channel feedback information.
  9. 9.根据权利要求8所述的站点,其特征在于,所述反馈请求为波束成形报告查询。 9. The station according to claim 8, wherein said feedback report request is a query beamforming.
  10. 10.根据权利要求9所述的站点,其特征在于,若所述站点与NDPA广播包所记录的第二个站点信息相对应,则所述预定的睡眠时间为一个短帧间距SIFS的时长。 10. A station according to claim 9, wherein, if the broadcast station and the packet NDPA the recorded information corresponding to a second site, then the sleep time is a predetermined duration of a short inter-frame space SIFS.
  11. 11.根据权利要求9所述的站点,其特征在于,若所述站点与NDPA广播包所记录的第三个或者其之后任一站点信息相对应,则所述站点还包括:睡眠时间计算单元,用于根据所述波束成形报告查询的长度、对该波束成形报告查询进行编码调制的调制编码方案以及所述接收站点对应的站点信息在NDPA广播包中的顺序编号,计算出所述预定的睡眠时间。 11. The station according to claim 9, wherein, if the broadcast station and the packet NDPA recorded third information after the site or any of its corresponding, then the station further comprising: sleep time calculation unit , according to the length of the query report beamforming, the beamforming report queries modulation code modulation coding scheme and the receiving station site information corresponding to the sequence number of the broadcast packets NDPA, calculating the predetermined sleeping time.
  12. 12.根据权利要求11所述的站点,其特征在于,所述睡眠计算单元包括:编码后长度计算模块,用于根据所述波束成形报告查询的长度和所述调制编码方案中的编码方式确定编码后波束成形报告查询的长度;调制后长度计算模块,用于根据所述编码后波束成形报告查询的长度和所述调制编码方案中的调制方式确定调制后波束成形报告查询的长度;OFDM符号数计算模块,用于根据所述调制后波束成形报告查询的长度和正交频分复用OFDM符号的数据子载波个数确定所述调制后波束成形报告查询的OFDM符号数;最短时间计算模块,用于由所述调制后波束成形报告查询的OFDM符号数和物理层包头部分的帧结构计算出发送所述调制后波束成形报告查询所需的最短时间;睡眠时间计算模块,用于根据公式STi = Tsifs+(1-2) * (2*TSIFS+minTtop),得到预定的睡眠时间;其中,STi表示ND 12. A station as claimed in claim 11, wherein the sleep calculation unit comprises: a length calculating means for determining the length of the modulation and coding scheme for the beam forming in the report query encoded encoding beamforming report queries the code length; longitudinal length modulation coding scheme and the modulation after the modulation length calculating means for reporting in accordance with the beam forming the encoded query after determining the beamforming modulated report query; the OFDM symbols number calculation module, according to the length of the modulation and quadrature beamforming query report frequency division multiplexing (OFDM) symbol number of data subcarriers is determined after the number of OFDM symbols forming the modulated beam query report; shortest time calculation module , the number of OFDM symbols for the frame structure and a physical layer header portion of the modulated beam forming the report query report query beamforming calculated minimum time required after transmitting the modulated; sleep time calculating module, according to the formula STi = Tsifs + (1-2) * (2 * TSIFS + minTtop), to give a predetermined sleep period; wherein, STi represents ND PA广播包所记录的第i个站点信息对应的接收站点的预定的睡眠时间,其中i > 3 ;TSIFS表示一个SIFS的时长;minTbip表示发送所述调制后波束成形报告查询所需的最短时间。 Predetermined sleep time i-th receiving station site information corresponding to the recorded broadcast packet PA, where i> 3; TSIFS denotes the duration of a SIFS; minTbip query report represents the beamforming minimum required time after transmitting said modulated.
  13. 13. 一种无线通信系统,其特征在于,包括:发送站点以及至少两个接收站点;所述发送站点为权利要求7所述的站点;所述至少两个接收站点中除第一个接收站点之外的接收站点均为权利要求8〜12任一项所述的站点。 13. A wireless communication system comprising: at least two transmitting station and the receiving station; said sending station is a station according to claim 7; the at least two receiving sites in addition to the first receiving station site any one of claims 8~12 are receiving station as claimed in claim outside.
CN 201110276263 2011-09-16 2011-09-16 A method for channel sounding, apparatus and system for CN103002471B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110276263 CN103002471B (en) 2011-09-16 2011-09-16 A method for channel sounding, apparatus and system for

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201110276263 CN103002471B (en) 2011-09-16 2011-09-16 A method for channel sounding, apparatus and system for
PCT/CN2012/076491 WO2013037219A1 (en) 2011-09-16 2012-06-05 Method, apparatus and system of channel sounding

Publications (2)

Publication Number Publication Date
CN103002471A true true CN103002471A (en) 2013-03-27
CN103002471B CN103002471B (en) 2016-03-30

Family

ID=47882573

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201110276263 CN103002471B (en) 2011-09-16 2011-09-16 A method for channel sounding, apparatus and system for

Country Status (2)

Country Link
CN (1) CN103002471B (en)
WO (1) WO2013037219A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017000308A1 (en) * 2015-07-02 2017-01-05 华为技术有限公司 Method for transmitting channel state information, access point, and station

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1354939A (en) * 1999-04-07 2002-06-19 艾利森电话股份有限公司 Mobile terminal sleep phase assignment and announcement in wireless local area network
US20110199946A1 (en) * 2010-02-17 2011-08-18 Qualcomm Incorporated Method and apparatus for supporting adaptive channel state information feedback rate in multi-user communication systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1354939A (en) * 1999-04-07 2002-06-19 艾利森电话股份有限公司 Mobile terminal sleep phase assignment and announcement in wireless local area network
US20110199946A1 (en) * 2010-02-17 2011-08-18 Qualcomm Incorporated Method and apparatus for supporting adaptive channel state information feedback rate in multi-user communication systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE: "《IEEE 802.11-10/1361r1》", 30 November 2010, article "IEEE P802.11 Wireless LANs Proposed TGac Draft Amendment" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017000308A1 (en) * 2015-07-02 2017-01-05 华为技术有限公司 Method for transmitting channel state information, access point, and station

Also Published As

Publication number Publication date Type
CN103002471B (en) 2016-03-30 grant
WO2013037219A1 (en) 2013-03-21 application

Similar Documents

Publication Publication Date Title
Bejarano et al. IEEE 802.11 ac: from channelization to multi-user MIMO
US20080268785A1 (en) UE-autonomous CFI reporting
US20120026909A1 (en) Method and apparatus for reporting channel state information of multi-channel in wireless local area network system
US20110096796A1 (en) Number of streams indication for wlan
US20110199946A1 (en) Method and apparatus for supporting adaptive channel state information feedback rate in multi-user communication systems
US20110235533A1 (en) Protocol to support adaptive station-dependent channel state information feedback rate in multi-user communication systems
US20110069629A1 (en) Physical layer metrics to support adaptive station-dependent channel state information feedback rate in multi-user communication systems
US20140126509A1 (en) Method for transmitting and receiving data unit based on uplink multiple user multiple input multiple output transmission and apparatus for the same
US20120218982A1 (en) Method and apparatus for transceiving a mimo packet in a wireless lan system
US7804800B2 (en) Efficient training schemes for MIMO based wireless networks
US20130223427A1 (en) Channel sounding method in wireless local area network system and apparatus for supporting the same
US20110128929A1 (en) Method and Apparatus for Sounding Multiple Stations
US20100322166A1 (en) Multi-user multiple input multiple output wireless communications
US20080045153A1 (en) Method and apparatus for providing beamforming feedback in wireless communication systems
US20120269183A1 (en) Method for reporting channel information based on link adaptation in wireless local area network and the apparatus for the same
US20130250904A1 (en) Method and apparatus of link adaptation in wireless local area network
WO2015068968A1 (en) Method and device for receiving multiuser uplink in wireless lan
US20140233478A1 (en) Acknowledgement (ack) type indication and deferral time determination
US8644368B1 (en) Transparent implicit beamforming in a communication system
US20130188630A1 (en) Method of link adaptation in wireless local area network and apparatus for the same
US20120177018A1 (en) Protocol for channel state information feedback
US20120257606A1 (en) Systems, methods and apparatus for determining control field and modulation coding scheme information
US20120230443A1 (en) Mu-mimo transmission method in wireless lan system
US20120250543A1 (en) Systems and methods for communication of channel state information
US20130010632A1 (en) Simultaneous Feedback Signaling for Dynamic Bandwidth Selection

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
C14 Grant of patent or utility model