WO2019233405A1 - 无线接入 - Google Patents

无线接入 Download PDF

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Publication number
WO2019233405A1
WO2019233405A1 PCT/CN2019/089963 CN2019089963W WO2019233405A1 WO 2019233405 A1 WO2019233405 A1 WO 2019233405A1 CN 2019089963 W CN2019089963 W CN 2019089963W WO 2019233405 A1 WO2019233405 A1 WO 2019233405A1
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Prior art keywords
radio frequency
nss
target
wireless terminal
frequency unit
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PCT/CN2019/089963
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English (en)
French (fr)
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李大鲲
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新华三技术有限公司
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Publication of WO2019233405A1 publication Critical patent/WO2019233405A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic

Definitions

  • NSS Numberer of Spatial Streams
  • the AP Access Point
  • the AP includes multiple RF units that support the same frequency band For example, it supports multiple radio frequency units in the 2.4G frequency band or multiple radio frequency units in the 5G frequency band. At least two of the radio frequency units support different NSSs.
  • the AP When the wireless terminal requests access to the AP, the AP randomly selects a radio frequency unit from these radio frequency units, and the selected radio frequency unit responds to the radio terminal.
  • FIG. 1 is a schematic flowchart of an access method according to an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of an access device according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an AP according to an embodiment of the present application.
  • a wireless terminal when a wireless terminal requests access to an AP, the AP randomly selects a radio frequency unit, and the selected radio frequency unit responds to the wireless terminal. In this way, there may be a problem that the NSS supported by the wireless terminal does not match the NSS supported by the connected radio frequency unit.
  • a wireless terminal supporting NSS 3 is connected to a radio unit supporting NSS 2 or 1 on the AP, while a wireless terminal supporting NSS 1 is connected to a radio unit supporting NSS 4 on the AP. This can easily cause AP hardware resources to be wasted.
  • An embodiment of the present application provides an access method, which is applied to an AP.
  • the access method includes:
  • the target NSS supported by the wireless terminal is extracted from the probe request message
  • FIG. 1 is a schematic flowchart of an access method according to an embodiment of the present application.
  • the access method includes the following steps.
  • a target NSS supported by the wireless terminal is extracted from the probe request message.
  • the frequency band supported by the radio frequency unit on the AP may be a 5G frequency band or a 2.4G frequency band, or other frequency bands, which is not limited herein.
  • the probe request message may carry relevant information about the wireless terminal, such as the NSS, working channel, and address information supported by the wireless terminal.
  • the NSS is the number of spatial streams supported by the wireless terminal, that is, the target NSS supported by the wireless terminal.
  • the AP determines that the wireless terminal supports 4 spatial streams.
  • the wireless terminal broadcasts a probe request message in the network.
  • the CPU (Central Processing Unit) of the AP selects a probe request message from a plurality of received probe request messages, and extracts a target NSS supported by the wireless terminal from the selected probe request messages.
  • the target NSS may be stored in a HT capability (high throughput capability info) field or a VHT capability (Very High Throughput capability info) field.
  • HT capability high throughput capability info
  • VHT capability Very High Throughput capability info
  • the AP After receiving the probe request message, the AP extracts the target NSS supported by the wireless terminal from the HT capability info field or the VHT capability info field of the probe request message.
  • At least two of the multiple radio frequency units support different NSSs.
  • one radio frequency unit supports NSS 3
  • one radio frequency unit supports NSS 2
  • the other radio frequency unit supports NSS 1.
  • the matching rules between the NSS supported by the RF unit and the target NSS can be customized. For example, a matching rule: Only when the NSS supported by the radio unit is the same as the target NSS, can the NSS supported by the radio unit be considered to match the target NSS. Another matching rule: if the difference between the NSS supported by the radio unit and the target NSS is within a preset value range, it can be considered that the NSS supported by the radio unit matches the target NSS.
  • an NSS interval including the target NSS may be determined from a plurality of preset NSS intervals as the target interval.
  • multiple NSS sections can be customized according to the NSS supported by the RF unit.
  • a plurality of NSS intervals may be customized according to different NSSs supported by the plurality of radio frequency units.
  • NSS intervals For example, if there are two and four NSSs supported by multiple radio frequency units, two NSS intervals can be set. Among them, one NSS interval is [1,2], [1,2] represents an interval greater than or equal to 1, and less than or equal to 2, and the other NSS interval is [3,8], and [3,8] represents greater than or Intervals that are equal to 3 and less than or equal to 8 and "[]" in this application all indicate intervals.
  • the AP After determining the target interval, the AP selects a target RF unit corresponding to a target interval from a plurality of RF units according to a preset correspondence relationship between the NSS interval and the RF unit, and determines the NSS and the NSS supported by the selected target RF unit.
  • Target NSS matches.
  • the corresponding relationship between the NSS interval and the radio frequency unit is customized.
  • the correspondence relationship between the NSS interval and the radio frequency unit may include a one-to-one correspondence relationship, that is, one NSS interval corresponds to one radio frequency unit, and may also include a one-to-many correspondence relationship, that is, one NSS interval corresponds to multiple radio frequency units.
  • the two corresponding relationships are described below.
  • the corresponding relationship between the NSS interval and the radio frequency unit is a one-to-one correspondence relationship, it can be considered that the NSS included in the NSS interval matches the NSS supported by the radio frequency unit corresponding to the NSS interval. For example, if the NSS interval is [1,2], and the NSS supported by the RF unit corresponding to the NSS is 2, then it can be considered that the NSS supported by the RF unit is 2 and 1 and 2 in the NSS interval are matched.
  • a radio frequency unit corresponding to the target interval can be directly determined as the target radio frequency unit.
  • the NSS supported by the target radio unit is matched with the target NSS.
  • the frequency band supported by the AP is the 5G frequency band.
  • the multiple radio frequency units supporting the 5G on the AP include a first radio frequency unit, a second radio frequency unit, and a third radio frequency unit.
  • the NSS supported by the first radio frequency unit is 2, and the second radio frequency unit is supported.
  • the NSS supported by the unit is 4, and the NSS supported by the third radio frequency unit is 6.
  • the preset NSS intervals may include [1,2], [3,4], and [5,6].
  • the corresponding relationship between the NSS interval and the radio frequency unit is: [1,2] corresponds to the first radio frequency unit, which means that when the target NSS is 1 or 2, the target NSS and the NSS supported by the first radio frequency unit are matched. [3,4] corresponds to the second radio frequency unit, which means that when the target NSS is 3 or 4, the target NSS and the NSS supported by the second radio frequency unit are 4; [5,6] corresponds to the third radio frequency unit, That is, when the target NSS is 5 or 6, the target NSS and the NSS supported by the third radio frequency unit are 6 are matched.
  • the AP determines that the target interval is [3,4]. According to the corresponding relationship between the NSS interval and the radio frequency unit, it can be determined that the second radio frequency unit is the target radio frequency unit, and the target radio frequency unit supports The NSS is 4, which matches the target NSS.
  • the AP determines a specific radio frequency unit in which the supported NSS matches the target NSS.
  • the radio frequency units supporting the 5G frequency band on the AP are: a radio frequency unit 1 and a radio frequency unit 2.
  • the NSS supported by 1 is 2, and the NSS supported by RF unit 2 is 4.
  • the NSS interval corresponding to the radio frequency unit 1 is an interval less than or equal to 2
  • the NSS interval corresponding to the radio frequency unit 2 is an interval greater than 2.
  • the AP extracts the target NSS, it determines whether the target NSS is greater than 2. When the target NSS is greater than 2, the AP determines that the radio frequency unit 2 is the target radio frequency unit. When the target NSS is not greater than 2, the AP determines that the radio frequency unit 1 is the target radio frequency unit.
  • the target interval corresponds to multiple radio frequency units.
  • the multiple radio frequency units may include radio units with the same supported NSS, and may also include different supported NSS.
  • RF unit is not limited here.
  • a radio frequency unit that supports the most compatible NSS and the target NSS is selected from the plurality of radio frequency units as the target radio frequency unit.
  • the target interval corresponds to two radio frequency units: radio frequency unit 1 and radio frequency unit 2, wherein the NSS supported by radio frequency unit 1 is 3, and the NSS supported by radio frequency unit 2 is 4. If the target interval is [2,4] and the target NSS is 3, you can determine that the NSS supported by RF unit 1 is the same as the target NSS, that is, the NSS supported by RF unit 1 matches the target NSS the best. Therefore, RF unit 1 is the target. RF unit.
  • the radio unit that most closely matches the supported NSS and the target NSS may be a radio unit that supports the same NSS as the target NSS.
  • the radio unit that supports the most compatible NSS with the target NSS may also be the radio unit with the smallest difference between the supported NSS and the target NSS.
  • a plurality of radio frequency units corresponding to a target interval includes a plurality of radio frequency units supporting the same NSS, and an NSS supported by a plurality of radio frequency units supporting the same NSS is the closest match to the target NSS, Then the AP randomly selects a radio frequency unit as a target radio frequency unit from the same radio frequency units of the supported NSS.
  • the AP may count the number of wireless terminals currently connected to each radio unit from multiple radio units supporting the same NSS, and determine the radio unit with the least number of currently accessed wireless terminals as the target radio unit. In this way, the load pressure between the RF units can be balanced.
  • the wireless terminal After receiving the probe response message sent by the target radio frequency unit, the wireless terminal accesses the target radio frequency unit according to the probe response message.
  • the AP can send a probe response message to the wireless terminal through the target radio frequency unit, and there can be at least two implementation manners.
  • the AP after the AP determines a target radio frequency unit, the AP only uses the target radio frequency unit to send a probe response message to the wireless terminal, and other radio frequency units of the AP do not send a probe response message to the wireless terminal.
  • the three radio frequency units supporting the 5G frequency band on the AP are: a first radio frequency unit, a second radio frequency unit, and a third radio frequency unit.
  • the first radio frequency unit is a target radio frequency unit
  • the AP only uses the first radio frequency unit to send a probe response message to the wireless terminal.
  • the wireless terminal After the wireless terminal receives the probe response message sent by the target radio frequency unit, the wireless terminal accesses the target radio frequency unit.
  • each radio frequency unit of the same frequency band supported on the AP sends a probe response message to the wireless terminal, but the target radio frequency unit preferentially sends a probe response message to the wireless terminal.
  • the target radio frequency unit preferentially sends a probe response message to the wireless terminal.
  • other radio frequency units send a probe response message to the wireless terminal.
  • the wireless terminal can receive the probe response message sent by the target radio frequency unit preferentially.
  • the wireless terminal preferentially receives the probe response message sent by the target radio frequency unit and directly accesses the target radio frequency unit.
  • the preset interval time is: the time in which the time point at which the target radio frequency unit sends the probe response message is earlier than the time point at which the other radio frequency unit sends the probe response message.
  • the interval time can be customized.
  • the three radio frequency units supporting the 5G band on the AP are: a first radio frequency unit, a second radio frequency unit, and a third radio frequency unit.
  • the first radio frequency unit is a target radio frequency unit
  • the preset interval is 3 seconds.
  • the AP determines that the first radio frequency unit is the target radio frequency unit, it first sends a probe response message to the wireless terminal through the first radio frequency unit.
  • the second radio frequency unit and the third radio frequency unit send the radio frequency to the wireless terminal respectively. Probe response message.
  • the wireless terminal preferentially receives the probe response message sent by the first radio frequency unit, and then directly accesses the first radio frequency unit.
  • an embodiment of the present application further provides an access device, which is applied to an AP.
  • an access device As shown in FIG. 2, a structural schematic diagram of the access device provided in the embodiment of the present application.
  • the access device includes :
  • the extraction module 210 is configured to extract a target NSS supported by the wireless terminal from the detection request message when a detection request message broadcast by the wireless terminal is received by multiple radio frequency units supporting the same frequency band on the AP;
  • a determining module 220 is configured to determine, from a plurality of radio frequency units, a target radio frequency unit in which a supported NSS matches a target NSS, wherein at least two radio frequency units in the plurality of radio frequency units support different NSSs;
  • the sending module 230 is configured to send a probe response message to the wireless terminal through the target radio frequency unit, so that the wireless terminal accesses the target radio frequency unit.
  • the determining module 220 is specifically configured to:
  • a target radio frequency unit corresponding to a target interval is selected from a plurality of radio frequency units, and it is determined that the NSS supported by the selected target radio frequency unit matches the target NSS.
  • the extraction module 210 is specifically configured to:
  • An embodiment of the present application further provides an AP.
  • the AP includes a processor 310 and a machine-readable storage medium 320.
  • the machine-readable storage medium 320 stores machine-executable instructions that can be executed by the processor 310.
  • the AP may further include: a communication interface 330 and a communication bus 340; wherein the processor 310, the machine-readable storage medium 320, and the communication interface 330 complete communication with each other through the communication bus 340, and the communication interface 330 Used for communication between the AP and other devices.
  • Processor 310 is facilitated by machine-executable instructions:
  • a target NSS supported by the wireless terminal is extracted from the probe request message
  • processor is implemented by machine-executable instructions:
  • a target radio frequency unit corresponding to a target interval is selected from a plurality of radio frequency units, and it is determined that the NSS supported by the selected target radio frequency unit matches the target NSS.
  • processor is implemented by machine-executable instructions:
  • the communication bus 340 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus.
  • the communication bus 340 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 3, but it does not mean that there is only one bus or one type of bus.
  • the machine-readable storage medium 320 may include RAM (Random Access Memory, Random Access Memory), and may also include NVM (Non-Volatile Memory, non-volatile memory), such as at least one disk memory. In addition, the machine-readable storage medium 320 may also be at least one storage device located remotely from the foregoing processor.
  • the processor 310 may be a general-purpose processor, including a CPU, an NP (Network Processor), and the like; it may also be a DSP (Digital Signal Processing), an ASIC (Application Specific Integrated Circuit, ASIC) , FPGA (Field-Programmable Gate Array, field programmable gate array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • NP Network Processor
  • DSP Digital Signal Processing
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array, field programmable gate array
  • other programmable logic devices discrete gate or transistor logic devices, discrete hardware components.
  • an embodiment of the present application further provides a machine-readable storage medium that stores machine executable instructions.
  • the machine executable instructions When called and executed by the processor, the machine executable instructions cause the processor to implement the foregoing. Access method.

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Abstract

一种接入方法及装置，应用于AP，该接入方法包括：在通过AP上支持的同一频段的多个射频单元接收到无线终端广播的探测请求报文时，从探测请求报文中提取无线终端支持的目标NSS；从多个射频单元中，确定一个支持的NSS与目标NSS匹配的目标射频单元；通过目标射频单元向无线终端发送探测响应报文，以使得无线终端接入到目标射频单元。通过该技术方案，使得无线终端与AP之间空间流的利用率最大化，进而减少AP硬件资源的浪费。

Description

无线接入
本申请要求于2018年6月4日提交中国专利局、申请号为201810563637.X发明名称为“一种接入方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
背景技术
无线网络中，影响无线速率的一个因素是NSS(Number of Spatial Stream，空间流数)。不同的无线终端支持的NSS不同。为了提供给用户更好的无线接入体验，满足支持不同NSS的无线终端同时接入无线设备的需求，无线设备厂商推出的AP(Access Point，接入点)包括支持同一频段的多个射频单元，例如支持2.4G频段的多个射频单元或者5G频段的多个射频单元。这些射频单元中至少两个射频单元支持的NSS不同。
无线终端请求接入AP时，AP从这些射频单元中随机选择一个射频单元，由所选择的射频单元响应无线终端。
附图简要说明
图1为本申请实施例提供的接入方法的一种流程示意图；
图2为本申请实施例提供的接入装置的一种结构示意图；
图3为本申请实施例提供的AP的一种结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请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申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，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，都属于本申请保护的范围。
在现有技术中，无线终端请求接入AP时，AP随机选择一个射频单元，由所选择的射频单元响应无线终端。这样一来，可能会出现无线终端支持的NSS与所接入的射频单元支持的NSS不匹配的问题。例如，支持NSS为3的无线终端接入到AP上支持NSS为2或者1的射频单元上，而支持NSS为1的无线终端却接入到AP上支持NSS为4的射频单元上。这容易造成AP硬件 资源浪费。
为了使得无线终端与AP之间空间流的利用率最大化，进而减少AP硬件资源的浪费。本申请实施例提供了一种接入方法，应用于AP，该接入方法包括：
在通过AP上支持的同一频段的多个射频单元接收到无线终端广播的探测请求报文时，从探测请求报文中提取无线终端支持的目标NSS；
从多个射频单元中，确定一个支持的NSS与目标NSS匹配的目标射频单元，其中，多个射频单元中至少两个射频单元支持的NSS不同；
通过目标射频单元向无线终端发送探测响应报文，以使得无线终端接入到目标射频单元。
本申请实施例提供的技术方案中，在AP上支持同一频段的多个射频单元接收到无线终端广播的探测请求报文时，提取该无线终端支持的目标NSS，并确定一个支持的NSS与该目标NSS匹配的目标射频单元，通过该目标射频单元向无线终端发送探测响应报文，使得无线终端接入到目标射频单元。通过该技术方案，使得无线终端与AP之间空间流的利用率最大化，进而减少了AP硬件资源的浪费。
下面首先对本申请实施例提供的一种接入方法进行介绍。该接入方法应用于AP。如图1所示的本申请实施例提供的接入方法的一种流程示意图，该接入方法包括如下步骤。
101，在通过AP支持的同一频段的多个射频单元接收到无线终端广播的探测请求报文时，从探测请求报文中提取无线终端支持的目标NSS。
其中，AP上的射频单元支持的频段可以是5G频段或者是2.4G频段，还可以是其他频段，在此不做限定。
探测请求报文中可以携带无线终端的相关信息，比如该无线终端支持的NSS、工作信道和地址信息等。其中，NSS为无线终端支持的空间流的数量，即为无线终端所支持的目标NSS。
例如，AP从无线终端广播的探测请求报文中提取的目标NSS为4，则AP确定该无线终端支持4个空间流。
无线终端在网络中广播探测请求报文。AP上支持同一频段的射频单元有多个。这多个射频单元均会接收到无线终端广播的探测请求报文。AP的CPU(Central Processing Unit，中央处理器)从接收的多个探测请求报文中选择一个探测请求报文，从所选择的探测请求报文中提取无线终端支持的目标NSS。
一种实施方式中，目标NSS可以存储在HT capability info(High Throughput capability info，高流通量性能信息)字段或VHT capability info(Very High Throughput capability info，极高流通量性能信息)字段中。
AP接收到探测请求报文后，从探测请求报文的HT capability info字段或VHT capability info字段中，提取该无线终端支持的目标NSS。
102，从多个射频单元中，确定一个支持的NSS与目标NSS匹配的目标射频单元。
其中，多个射频单元中至少两个射频单元支持的NSS不同。例如，AP上支持的5G频段的射频单元有3个，其中，一个射频单元支持的NSS为3，一个射频单元支持的NSS为2，另一个射频单元支持的NSS为1。
射频单元支持的NSS与目标NSS匹配的规则可以是自定义的。例如，一种匹配规则：只有射频单元支持的NSS与目标NSS相同，才可以认为射频单元支持的NSS与目标NSS匹配。另一种匹配规则：射频单元支持的NSS与目标NSS相差的数值在预设数值范围内，则可以认为该射频单元支持的NSS与目标NSS相匹配。
一种实施方式中，在AP提取到目标NSS之后，可以从预设的多个NSS区间中，确定包含目标NSS的NSS区间，作为目标区间。
其中，多个NSS区间可以根据射频单元所支持NSS的情况自定义设定。具体地，可以根据多个射频单元所支持的不同的NSS，来自定义划分多个NSS区间。
例如，多个射频单元所支持的NSS包括2个和4个，则可以设定两个NSS 区间。其中，一个NSS区间为[1,2]，[1,2]表示大于或者等于1、且小于或者等于2的区间，另一个NSS区间为[3,8]，[3,8]表示大于或者等于3、且小于或者等于8的区间，本申请中的“[]”均表示区间。
在确定出目标区间之后，AP根据预设的NSS区间与射频单元的对应关系，从多个射频单元中，选择一个目标区间对应的目标射频单元，并确定选择出的目标射频单元支持的NSS与目标NSS匹配。
其中，NSS区间与射频单元的对应关系是自定义设定的。
NSS区间与射频单元的对应关系中可以包括一对一的对应关系，即一个NSS区间对应一个射频单元，还可以包括一对多的对应关系，即一个NSS区间对应多个射频单元。下面分别对两种对应关系进行说明。
在NSS区间与射频单元的对应关系为一对一的对应关系时，可以认为，NSS区间内所包括的NSS与该NSS区间对应的射频单元支持的NSS是匹配的。例如，NSS区间为[1,2]，该NSS区间对应的射频单元支持的NSS为2，则可以认为，射频单元支持的NSS为2与NSS区间内的1和2均是匹配的。
根据NSS区间与射频单元的对应关系，可以直接将目标区间对应的一个射频单元确定为目标射频单元。该目标射频单元支持的NSS是与目标NSS匹配的。
例如，AP支持的频段为5G频段，AP上支持5G的多个射频单元包括第一射频单元、第二射频单元和第三射频单元，其中，第一射频单元支持的NSS为2，第二射频单元支持的NSS为4，第三射频单元支持的NSS为6。预设的NSS区间可以包括[1,2]、[3,4]和[5,6]。
此时，NSS区间与射频单元的对应关系为：[1,2]对应第一射频单元，即表示目标NSS为1或2时，目标NSS与第一射频单元所支持的NSS为2是匹配的；[3,4]对应第二射频单元，即表示目标NSS为3或4时，目标NSS与第二射频单元所支持的NSS为4是匹配的；[5,6]对应第三射频单元，即表示目标NSS为5或6时，目标NSS与第三射频单元所支持的NSS为6是匹配的。
当所提取的目标NSS为4时，则AP确定目标区间为[3,4]，根据上述NSS 区间与射频单元的对应关系，可以确定第二射频单元为目标射频单元，且该目标射频单元所支持的NSS为4，与目标NSS是相匹配的。
AP根据目标NSS，确定所支持的NSS与该目标NSS相匹配的目标射频单元的一种具体实现方式中，AP上支持5G频段的射频单元为：射频单元1和射频单元2，其中，射频单元1支持的NSS为2，射频单元2支持的NSS为4。其中，预设的NSS区间与射频单元的对应关系中，射频单元1对应的NSS区间为小于或者等于2的区间，射频单元2对应的NSS区间为大于2的区间。当AP提取到目标NSS后，判断该目标NSS是否大于2。当目标NSS大于2时，AP确定射频单元2为目标射频单元。当目标NSS不大于2时，AP确定射频单元1为目标射频单元。
在NSS区间与射频单元的对应关系中存在一对多的对应关系时，目标区间对应多个射频单元，该多个射频单元中可以包括支持的NSS相同的射频单元，还可以包括支持的NSS不同的射频单元，在此不做限定。
当目标区间对应的多个射频单元中包括支持的NSS不同的射频单元时，从该多个射频单元中选择支持的NSS与目标NSS最匹配的一个射频单元，作为目标射频单元。
例如，目标区间对应两个射频单元：射频单元1和射频单元2，其中，射频单元1支持的NSS为3，射频单元2支持的NSS为4。目标区间为[2,4]，目标NSS为3，则可以确定射频单元1支持的NSS与目标NSS相同，也就是射频单元1支持的NSS与目标NSS最匹配，因此，将射频单元1作为目标射频单元。
本申请实施例中，支持的NSS与目标NSS最匹配的射频单元可以为支持的NSS与目标NSS相同的射频单元。支持的NSS与目标NSS最匹配的射频单元也可以为支持的NSS与目标NSS之间的差值最小的射频单元。
一种实现方式中，当目标区间对应的多个射频单元中包括支持的NSS相同的多个射频单元时，且支持的NSS相同的多个射频单元所支持的NSS是与目标NSS最匹配的，则AP从该支持的NSS相同的射频单元中随机选择一个射频单元作为目标射频单元。
一种实现方式中，当目标区间对应的多个射频单元中包括支持的NSS相同 的多个射频单元时，且支持的NSS相同的多个射频单元所支持的NSS是与目标NSS最匹配的，则AP可以从支持的NSS相同的多个射频单元中，统计各射频单元当前接入的无线终端的数量，并将当前接入的无线终端的数量最少的射频单元确定为目标射频单元。这样，可以平衡各射频单元之间的负载压力。
当然，不仅限于通过上述实现方式来选取目标射频单元，还可以利用其他的方式来选取，在此不作限定。
103，通过目标射频单元向无线终端发送探测响应报文。
无线终端接收到目标射频单元发送的探测响应报文后，根据该探测响应报文接入到目标射频单元。
其中，AP通过目标射频单元向无线终端发送探测响应报文，可以有至少两种实现方式。
第一种实现方式，当AP确定出目标射频单元后，AP仅利用该目标射频单元向无线终端发送探测响应报文，AP的其他射频单元不会向该无线终端发送探测响应报文。例如，AP上支持5G频段的3个射频单元为：第一射频单元、第二射频单元和第三射频单元。其中，第一射频单元为目标射频单元，则AP仅利用第一射频单元向无线终端发送探测响应报文。
无线终端接收到目标射频单元发送的探测响应报文后，无线终端接入到目标射频单元。
第二种实现方式，当AP确定出目标射频单元后，AP上支持的同一频段的每一个射频单元均向无线终端发送探测响应报文，但目标射频单元优先向无线终端发送探测响应报文。在预设的间隔时长之后，其他的射频单元再向无线终端发送探测响应报文。
这样，对于无线终端来说，可以优先接收到目标射频单元发送的探测响应报文。无线终端优先接收到目标射频单元发送的探测响应报文，直接接入到目标射频单元。
其中，预设的间隔时长为：目标射频单元发送探测响应报文的时间点相比于其他射频单元发送探测响应报文的时间点提前的时长。间隔时长可以是 自定义设定的。
例如，AP上支持5G频段的3个射频单元为：第一射频单元、第二射频单元和第三射频单元，其中第一射频单元为目标射频单元，预设的间隔时长为3秒。AP在确定第一射频单元为目标射频单元后，首先通过第一射频单元优先向无线终端发送探测响应报文，在间隔3秒之后，第二射频单元和第三射频单元再分别向无线终端发送探测响应报文。这样，无线终端会优先接收到第一射频单元发送的探测响应报文，进而直接接入到第一射频单元。
本申请实施例提供的技术方案中，在AP上支持同一频段的多个射频单元接收到无线终端广播的探测请求报文时，提取该无线终端支持的目标NSS，并确定一个支持的NSS与该目标NSS匹配的目标射频单元，通过该目标射频单元向无线终端发送探测响应报文，使得无线终端接入到目标射频单元。通过该技术方案，使得无线终端与AP之间空间流的利用率最大化，进而减少AP硬件资源的浪费。
相应于接入方法实施例，本申请实施例还提供一种接入装置，应用于AP，如图2所示的本申请实施例提供的接入装置的一种结构示意图，该接入装置包括：
提取模块210，用于在通过AP上支持同一频段的多个射频单元接收到无线终端广播的探测请求报文时，从探测请求报文中提取无线终端支持的目标NSS；
确定模块220，用于从多个射频单元中，确定一个支持的NSS与目标NSS匹配的目标射频单元，其中，多个射频单元中至少两个射频单元支持的NSS不同；
发送模块230，用于通过目标射频单元向无线终端发送探测响应报文，以使得无线终端接入到目标射频单元。
可选地，确定模块220具体用于：
从预设的多个NSS区间中，确定包含目标NSS的NSS区间，作为目标 区间；
根据预设的NSS区间与射频单元的对应关系，从多个射频单元中，选择一个目标区间对应的目标射频单元，并确定选择出的目标射频单元支持的NSS与目标NSS匹配。
可选地，提取模块210具体用于：
从探测请求报文的高流通量性能信息字段或极高流通量性能信息字段中，提取无线终端所支持的目标NSS。
本申请实施例提供的技术方案中，在AP上支持同一频段的多个射频单元接收到无线终端广播的探测请求报文时，提取该无线终端支持的目标NSS，并确定一个支持的NSS与该目标NSS匹配的目标射频单元，通过该目标射频单元向无线终端发送探测响应报文，使得无线终端接入到目标射频单元。通过该技术方案，使得无线终端与AP之间空间流的利用率最大化，进而减少AP硬件资源的浪费。
本申请实施例还提供了一种AP，如图3所示，包括处理器310和机器可读存储介质320，机器可读存储介质320存储有能够被处理器310执行的机器可执行指令。
另外，如图3所示，AP还可以包括：通信接口330和通信总线340；其中，处理器310、机器可读存储介质320、通信接口330通过通信总线340完成相互间的通信，通信接口330用于上述AP与其他设备之间的通信。
处理器310被机器可执行指令促使实现：
在通过AP上支持同一频段的多个射频单元接收到无线终端广播的探测请求报文时，从探测请求报文中提取无线终端支持的目标NSS；
从多个射频单元中，确定一个支持的NSS与目标NSS匹配的目标射频单元，其中，多个射频单元中至少两个射频单元支持的NSS不同；
通过目标射频单元向无线终端发送探测响应报文，以使得无线终端接入到目标射频单元。
可选地，处理器被机器可执行指令促使具体实现：
从预设的多个NSS区间中，确定包含目标NSS的NSS区间，作为目标区间；
根据预设的NSS区间与射频单元的对应关系，从多个射频单元中，选择一个目标区间对应的目标射频单元，并确定选择出的目标射频单元支持的NSS与目标NSS匹配。
可选地，处理器被机器可执行指令促使具体实现：
从探测请求报文的高流通量性能信息字段或极高流通量性能信息字段中，提取无线终端所支持的目标NSS。
本申请实施例提供的技术方案中，在AP上支持同一频段的多个射频单元接收到无线终端广播的探测请求报文时，提取该无线终端支持的目标NSS，并确定一个支持的NSS与该目标NSS匹配的目标射频单元，通过该目标射频单元向无线终端发送探测响应报文，使得无线终端接入到目标射频单元。通过该技术方案，使得无线终端与AP之间空间流的利用率最大化，进而减少AP硬件资源的浪费。
上述通信总线340可以是PCI(Peripheral Component Interconnect，外设部件互连标准)总线或EISA(Extended Industry Standard Architecture，扩展工业标准结构)总线等。该通信总线340可以分为地址总线、数据总线、控制总线等。为便于表示，图3中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
机器可读存储介质320可以包括RAM(Random Access Memory，随机存取存储器)，也可以包括NVM(Non-Volatile Memory，非易失性存储器)，例如至少一个磁盘存储器。另外，机器可读存储介质320还可以是至少一个位于远离前述处理器的存储装置。
上述处理器310可以是通用处理器，包括CPU、NP(Network Processor，网络处理器)等；还可以是DSP(Digital Signal Processing，数字信号处理器)、ASIC(Application Specific Integrated Circuit，专用集成电路)、FPGA(Field-Programmable Gate Array，现场可编程门阵列)或其他可编程逻辑器 件、分立门或者晶体管逻辑器件、分立硬件组件。
相应于上述接入方法的实施例，本申请实施例还提供了一种机器可读存储介质，存储有机器可执行指令，在被处理器调用和执行时，机器可执行指令促使处理器实现上述接入方法。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
本说明书中的各个实施例均采用相关的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于接入装置、AP和机器可读存储介质实施例而言，由于其基本相似于接入方法实施例，所以描述的比较简单，相关之处参见接入方法实施例的部分说明即可。
以上所述仅为本申请的较佳实施例而已，并非用于限定本申请的保护范围。凡在本申请的精神和原则之内所作的任何修改、等同替换、改进等，均包含在本申请的保护范围内。

Claims (6)

  1. 一种接入方法，应用于接入点AP，所述方法包括：
    在通过所述AP上支持同一频段的多个射频单元接收到无线终端广播的探测请求报文时，从所述探测请求报文中提取所述无线终端支持的目标空间流数NSS；
    从所述多个射频单元中，确定一个支持的NSS与所述目标NSS匹配的目标射频单元，其中，所述多个射频单元中至少两个射频单元支持的NSS不同；
    通过所述目标射频单元向所述无线终端发送探测响应报文，以使得所述无线终端接入到所述目标射频单元。
  2. 根据权利要求1所述的方法，所述从所述多个射频单元中，确定一个支持的NSS与所述目标NSS匹配的目标射频单元的步骤，包括：
    从预设的多个NSS区间中，确定包含所述目标NSS的NSS区间，作为目标区间；
    根据预设的NSS区间与射频单元的对应关系，从所述多个射频单元中，选择一个所述目标区间对应的目标射频单元，并确定选择出的目标射频单元支持的NSS与所述目标NSS匹配。
  3. 根据权利要求1所述的方法，所述从所述探测请求报文中提取所述无线终端支持的目标NSS的步骤，包括：
    从所述探测请求报文的高流通量性能信息字段或极高流通量性能信息字段中，提取所述无线终端支持的目标NSS。
  4. 一种接入点AP，包括处理器和机器可读存储介质，所述机器可读存储介质存储有能够被所述处理器执行的机器可执行指令，所述处理器被所述机器可执行指令促使实现：
    在通过所述AP上支持同一频段的多个射频单元接收到无线终端广播的探测请求报文时，从所述探测请求报文中提取所述无线终端支持的目标空间流数NSS；
    从所述多个射频单元中，确定一个支持的NSS与所述目标NSS匹配的目标射频单元，其中，所述多个射频单元中至少两个射频单元支持的NSS不同；
    通过所述目标射频单元向所述无线终端发送探测响应报文，以使得所述无线终端接入到所述目标射频单元。
  5. 根据权利要求4所述的AP，所述处理器被所述机器可执行指令促使具体实现：
    从预设的多个NSS区间中，确定包含所述目标NSS的NSS区间，作为目标区间；
    根据预设的NSS区间与射频单元的对应关系，从所述多个射频单元中，选择一个所述目标区间对应的目标射频单元，并确定选择出的目标射频单元支持的NSS与所述目标NSS匹配。
  6. 根据权利要求4所述的AP，所述处理器被所述机器可执行指令促使具体实现：
    从所述探测请求报文的高流通量性能信息字段或极高流通量性能信息字段中，提取所述无线终端所支持的目标NSS。
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