CN115484677A - Time distribution method and device, access point and station - Google Patents
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Abstract
本申请实施例公开了一种时间分配方法与装置、接入点和站点;该方法包括:接入点发送触发帧,触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,触发帧包括一个公共信息字段和至少一个用户信息字段,L的取值为大于或等于1的整数;站点获取该触发帧。由于该公共信息字段携带有用于指示第一传输时间的第一信息,以及该用户信息字段携带有用于配置在第一传输时间内分配给该用户信息字段对应的L个站点中的站点的传输时间的第二信息,从而通过该触发帧实现在第一传输时间内为L个站点中每个站点分配各自的传输时间,保证触发帧的帧结构之间具有兼容性和一致性,实现通过一个触发帧触发多个无线帧传输,进而提升信道利用效率。
The embodiment of the present application discloses a time allocation method and device, an access point, and a station; the method includes: the access point sends a trigger frame, and the trigger frame is used to allocate transmission time within the transmission opportunity TXOP to L stations to transmit wireless frames , the trigger frame includes a public information field and at least one user information field, and the value of L is an integer greater than or equal to 1; the station obtains the trigger frame. Because the common information field carries first information for indicating the first transmission time, and the user information field carries the transmission time for configuring the stations among the L stations corresponding to the user information field within the first transmission time The second information of the trigger frame, so that each station in the L stations can be allocated their own transmission time within the first transmission time through the trigger frame, ensuring compatibility and consistency between the frame structures of the trigger frame, and realizing a trigger A frame triggers the transmission of multiple wireless frames, thereby improving channel utilization efficiency.
Description
技术领域technical field
本申请涉及通信技术领域,尤其涉及一种时间分配方法与装置、接入点和站点。The present application relates to the technical field of communications, and in particular to a time allocation method and device, an access point and a station.
背景技术Background technique
电气与电子工程师协会(Institute of Electrical and ElectronicEngineers,IEEE)组织制定关于无线局域网(wireless local access network,WLAN)的IEEE 802.11系列协议标准已制定相关的传输机会(transmission opportunity,TXOP)机制。其中,若非接入点的站点(none access point station,non-AP STA,也简称为STA或者站点)获取到分配的TXOP内的一段时间片(即TXOP内传输时间),则该站点可以在TXOP内该段时间片中无需再竞争信道以传输数据,从而提升信道利用效率。The Institute of Electrical and Electronic Engineers (Institute of Electrical and Electronic Engineers, IEEE) has formulated the IEEE 802.11 series of protocol standards on wireless local area network (wireless local access network, WLAN), and has formulated a related transmission opportunity (transmission opportunity, TXOP) mechanism. Wherein, if a non-access point station (none access point station, non-AP STA, also referred to as STA or station) obtains a period of time within the allocated TXOP (that is, the transmission time within the TXOP), then the station can In this time slice, there is no need to compete for channels to transmit data, thereby improving channel utilization efficiency.
目前,IEEE 802.11ax协议标准只规定一个触发帧(trigger frame,TF)触发向接入点的站点(access point station,AP STA,也简称为AP或者接入点)传输一个无线帧的场景。然而,IEEE当前正在制定的下一代WLAN协议标准(如IEEE 802.11be)可能存在一个触发帧触发多个无线帧传输的场景。由于各个WLAN协议标准之间需要具备向后兼容性,因此在IEEE 802.11be等下一代WLAN协议标准需要兼容IEEE 802.11ax协议标准的情况下,如何将TXOP内传输时间分配给至少一个站点,还需要进一步研究。Currently, the IEEE 802.11ax protocol standard only specifies a scenario where a trigger frame (trigger frame, TF) triggers the transmission of a wireless frame to an access point station (access point station, AP STA, also referred to as AP or access point). However, a next-generation WLAN protocol standard (such as IEEE 802.11be) currently being developed by the IEEE may have a scenario where a trigger frame triggers the transmission of multiple wireless frames. Since each WLAN protocol standard needs to have backward compatibility, when the next-generation WLAN protocol standard such as IEEE 802.11be needs to be compatible with the IEEE 802.11ax protocol standard, how to allocate the transmission time in the TXOP to at least one station also needs to further research.
发明内容Contents of the invention
本申请实施例提供一种时间分配方法与装置、接入点和站点,以期望通过一个触发帧实现将TXOP内传输时间分配给至少一个站点,保证各个WLAN协议标准所规定的触发帧的帧结构之间具有兼容性和一致性,实现通过一个触发帧触发多个无线帧传输,提升信道利用效率。The embodiment of the present application provides a time allocation method and device, an access point, and a station, in order to realize the allocation of the transmission time in the TXOP to at least one station through a trigger frame, and ensure the frame structure of the trigger frame stipulated in each WLAN protocol standard There is compatibility and consistency between them, and one trigger frame can be used to trigger the transmission of multiple wireless frames to improve channel utilization efficiency.
第一方面,本申请实施例提供一种时间分配方法,包括:In the first aspect, the embodiment of the present application provides a time allocation method, including:
接入点发送触发帧,所述触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,所述触发帧包括一个公共信息字段和至少一个用户信息字段,所述L的取值为大于或等于1的整数;其中,The access point sends a trigger frame, the trigger frame is used to allocate transmission time within the transmission opportunity TXOP to L stations to transmit wireless frames, the trigger frame includes a public information field and at least one user information field, and the value of L is The value is an integer greater than or equal to 1; where,
所述公共信息字段携带第一信息,所述第一信息用于指示所述第一传输时间;The common information field carries first information, and the first information is used to indicate the first transmission time;
所述用户信息字段携带第二信息,所述第二信息用于配置在所述第一传输时间内分配给所述用户信息字段对应的所述L个站点中的站点的传输时间。The user information field carries second information, and the second information is used to configure a transmission time allocated to a station in the L stations corresponding to the user information field within the first transmission time.
第二方面,本申请实施例提供一种时间分配方法,包括:In the second aspect, the embodiment of the present application provides a time allocation method, including:
站点获取触发帧,所述触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,所述触发帧包括一个公共信息字段和至少一个用户信息字段,所述L为大于或等于1的整数;其中,The station acquires a trigger frame, the trigger frame is used to allocate transmission time within the transmission opportunity TXOP to L stations to transmit wireless frames, the trigger frame includes a public information field and at least one user information field, and the L is greater than or equal to an integer of 1; where,
所述公共信息字段携带第一信息,所述第一信息用于指示所述第一传输时间;The common information field carries first information, and the first information is used to indicate the first transmission time;
所述用户信息字段携带第二信息,所述第二信息用于配置在所述第一传输时间内分配给所述用户信息字段对应的所述L个站点中的站点的传输时间。The user information field carries second information, and the second information is used to configure a transmission time allocated to a station in the L stations corresponding to the user information field within the first transmission time.
第三方面,本申请实施例提供一种时间分配装置,所述装置包括处理单元和通信单元,所述处理单元用于:In the third aspect, the embodiment of the present application provides a time allocation device, the device includes a processing unit and a communication unit, and the processing unit is used for:
通过所述通信单元发送触发帧,所述触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,所述触发帧包括一个公共信息字段和至少一个用户信息字段,所述L的取值为大于或等于1的整数;其中,A trigger frame is sent by the communication unit, the trigger frame is used to allocate transmission time within the transmission opportunity TXOP to L stations to transmit wireless frames, the trigger frame includes a public information field and at least one user information field, the L The value of is an integer greater than or equal to 1; among them,
所述公共信息字段携带第一信息,所述第一信息用于指示所述第一传输时间;The common information field carries first information, and the first information is used to indicate the first transmission time;
所述用户信息字段携带第二信息,所述第二信息用于配置在所述第一传输时间内分配给所述用户信息字段对应的所述L个站点中的站点的传输时间。The user information field carries second information, and the second information is used to configure a transmission time allocated to a station in the L stations corresponding to the user information field within the first transmission time.
第四方面,本申请实施例提供一种时间分配装置,所述装置包括处理单元和通信单元,所述处理单元用于:In a fourth aspect, an embodiment of the present application provides a time allocation device, the device includes a processing unit and a communication unit, and the processing unit is used for:
通过所述通信单元获取触发帧,所述触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,所述触发帧包括一个公共信息字段和至少一个用户信息字段,所述L为大于或等于1的整数;其中,A trigger frame is acquired by the communication unit, and the trigger frame is used to allocate transmission time within a transmission opportunity TXOP to L stations to transmit a wireless frame, the trigger frame includes a common information field and at least one user information field, and the L is an integer greater than or equal to 1; where,
所述公共信息字段携带第一信息,所述第一信息用于指示所述第一传输时间;The common information field carries first information, and the first information is used to indicate the first transmission time;
所述用户信息字段携带第二信息,所述第二信息用于配置在所述第一传输时间内分配给所述用户信息字段对应的所述L个站点中的站点的传输时间。The user information field carries second information, and the second information is used to configure a transmission time allocated to a station in the L stations corresponding to the user information field within the first transmission time.
第五方面,本申请实施例提供一种接入点,包括处理器、存储器、通信接口以及一个或多个程序,其中,所述一个或多个程序被存储在所述存储器中,并且被配置由所述处理器执行,所述一个或多个程序包括用于执行本申请实施例第一方面中的步骤的指令。In a fifth aspect, the embodiment of the present application provides an access point, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured Executed by the processor, the one or more programs include instructions for executing the steps in the first aspect of the embodiments of the present application.
第六方面,本申请实施例提供一种站点,包括处理器、存储器、通信接口以及一个或多个程序,其中,所述一个或多个程序被存储在所述存储器中,并且被配置由所述处理器执行,所述一个或多个程序包括用于执行本申请实施例第二方面中的步骤的指令。In a sixth aspect, the embodiment of the present application provides a site, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured by the The one or more programs include instructions for executing the steps in the second aspect of the embodiments of the present application.
第七方面,本申请实施例提供一种计算机可读存储介质,其中,所述计算机可读存储介质存储用于电子数据交换的计算机程序,其中,所述计算机程序使得计算机执行如本申请实施例第一方面或第二方面中所描述的部分或全部步骤。In a seventh aspect, the embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables the computer to execute the computer program according to the embodiment of the present application. Part or all of the steps described in the first aspect or the second aspect.
第八方面,本申请实施例提供一种计算机程序,其中,所述计算机程序可操作来使计算机执行如本申请实施例第一方面或第二方面中所描述的部分或全部步骤。该计算机程序可以为一个软件安装包。In an eighth aspect, the embodiments of the present application provide a computer program, wherein the computer program is operable to cause a computer to perform some or all of the steps described in the first aspect or the second aspect of the embodiments of the present application. The computer program can be a software installation package.
可以看出,接入点发送触发帧,该触发帧用于向L个站点分配TXOP内传输时间以传输无线帧,该触发帧包括一个公共信息字段和至少一个用户信息字段,L的取值为大于或等于1的整数;站点获取该触发帧。由于该触发帧的公共信息字段携带有用于指示该第一传输时间的第一信息,以及该触发帧的用户信息字段携带有用于配置在该第一传输时间内分配给该用户信息字段对应的L个站点中的站点的传输时间的第二信息,从而通过该触发帧实现在该第一传输时间内为L个站点中的每个站点分配各自的传输时间,保证各个WLAN协议标准所规定的触发帧的帧结构之间具有兼容性和一致性,实现通过一个触发帧触发多个无线帧传输,进而提升信道利用效率。It can be seen that the access point sends a trigger frame, which is used to allocate transmission time in the TXOP to L stations to transmit wireless frames, and the trigger frame includes a public information field and at least one user information field, and the value of L is An integer greater than or equal to 1; the station gets this trigger frame. Since the public information field of the trigger frame carries the first information for indicating the first transmission time, and the user information field of the trigger frame carries the L corresponding to the user information field for configuring the first transmission time The second information of the transmission time of the stations in the stations, so that each station in the L stations can be assigned a respective transmission time within the first transmission time through the trigger frame, so as to ensure the triggering specified in each WLAN protocol standard. The frame structures of the frames are compatible and consistent, and one trigger frame can be used to trigger the transmission of multiple wireless frames, thereby improving the channel utilization efficiency.
附图说明Description of drawings
为了更清楚地说明本申请实施例中的技术方案,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申请的一些实施例,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。In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only for the present application For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.
图1是本申请实施例提供的一种无线通信系统的架构示意图;FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application;
图2是本申请实施例提供的一种触发帧的帧结构示意图;FIG. 2 is a schematic diagram of a frame structure of a trigger frame provided by an embodiment of the present application;
图3是本申请实施例提供的一种MU-RTS触发帧中的公共信息字段的帧结构示意图;FIG. 3 is a schematic diagram of a frame structure of a common information field in a MU-RTS trigger frame provided by an embodiment of the present application;
图4是本申请实施例提供的一种MU-RTS触发帧中的用户信息字段的帧结构示意图;FIG. 4 is a schematic diagram of a frame structure of a user information field in a MU-RTS trigger frame provided by an embodiment of the present application;
图5是本申请实施例提供的一种时间分配方法的流程示意图;FIG. 5 is a schematic flow diagram of a time allocation method provided by an embodiment of the present application;
图6至图13是本申请实施例提供的一种触发帧向站点分配传输机会时间的结构示意图;FIG. 6 to FIG. 13 are structural schematic diagrams of a trigger frame allocating transmission opportunity time to a station provided by an embodiment of the present application;
图14是本申请实施例提供的一种时间分配装置的功能单元组成框图;FIG. 14 is a block diagram of functional units of a time distribution device provided by an embodiment of the present application;
图15是本申请实施例提供的又一种时间分配装置的功能单元组成框图;Fig. 15 is a block diagram of functional units of another time distribution device provided by the embodiment of the present application;
图16是本申请实施例提供的一种接入点的结构示意图;FIG. 16 is a schematic structural diagram of an access point provided by an embodiment of the present application;
图17是本申请实施例提供的一种站点的结构示意图。Fig. 17 is a schematic structural diagram of a site provided by an embodiment of the present application.
具体实施方式detailed description
为了本技术领域人员更好理解本申请的技术方案,下面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描述。显然所描述的实施例是本申请一部分实施例,而不是全部的实施例。针对本申请中的实施例,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。In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. With regard to the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象,而不是用于描述特定顺序。此外,术语“包括”和“具有”以及它们任何变形,意图在于覆盖不排他的包含。例如,包含了一系列步骤或单元的过程、方法、软件、产品或设备没有限定于已列出的步骤或单元,而是还包括没有列出的步骤或单元,或还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, software, product, or device that includes a series of steps or units is not limited to the listed steps or units, but also includes steps or units that are not listed, or includes , other steps or units inherent in the product or equipment.
在本文中提及“实施例”意味着,结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例,也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是,本文所描述的实施例可以与其它实施例相结合。Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.
需要说明的是,本申请实施例中出现的“连接”是指直接连接或者间接连接等各种连接方式,以实现设备间的通信,对此不做任何限定。本申请实施例中出现的“网络”与“系统”表达的是同一概念,通信系统即为通信网络。It should be noted that the "connection" in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection to realize communication between devices, and there is no limitation on this. "Network" and "system" in the embodiments of the present application express the same concept, and the communication system is the communication network.
本申请实施例可以应用于无线局域网(Wireless Local Area Network,WLAN)。目前,WLAN采用的协议标准为IEEE 802.11系列。其中,WLAN可以包括多个基本服务集(basicservice set,BSS),而基本服务集中的设备可以包括接入点的站点(access pointstation,AP STA,也简称为AP或者接入点)和非接入点的站点(none access pointstation,non-AP STA,也简称为STA或者站点)。另外,每个基本服务集可以包含一个接入点和至少一个站点。The embodiments of the present application may be applied to a wireless local area network (Wireless Local Area Network, WLAN). Currently, the protocol standard adopted by WLAN is IEEE 802.11 series. Wherein, the WLAN may include multiple basic service sets (basicservice set, BSS), and the devices in the basic service set may include an access point station (access point station, AP STA, also referred to as AP or access point) and a non-access point station. A point station (none access pointstation, non-AP STA, also referred to as STA or station for short). In addition, each basic service set may contain one access point and at least one station.
具体的,接入点可以是经由无线媒体为与其连接的站点提供网络接入的实体。接入点可以将各个无线网络客户端接入以太网。接入点可以是无线保真(WirelessFidelity,WiFi)芯片的网络设备。接入点可以是支持各类IEEE 802.11协议标准的设备。例如,接入点可以支持IEEE 802.11ac、IEEE 802.11n、IEEE 802.11g、IEEE 802.11b、IEEE802.11ax、IEEE802.11be、下一代WLAN协议标准等的设备。接入点可以包括集中式控制器、基站(base station,BS)、基站收发台(base transceiver station,BTS)、站点控制器和交换机等。Specifically, an access point may be an entity that provides network access for stations connected to it via a wireless medium. The access point connects individual wireless network clients to the Ethernet. The access point may be a network device with a wireless fidelity (Wireless Fidelity, WiFi) chip. The access point may be a device supporting various IEEE 802.11 protocol standards. For example, the access point may support devices of IEEE 802.11ac, IEEE 802.11n, IEEE 802.11g, IEEE 802.11b, IEEE802.11ax, IEEE802.11be, next-generation WLAN protocol standards, and the like. The access point may include a centralized controller, a base station (base station, BS), a base transceiver station (base transceiver station, BTS), a site controller, a switch, and the like.
进一步的,接入点可以包括具有为站点提供无线通信功能的装置,例如芯片系统。其中,该芯片系统可以包括芯片,还可以包括其它分立器件,如收发器件等。Further, the access point may include a device that provides a wireless communication function for the station, such as a chip system. Wherein, the chip system may include a chip, and may also include other discrete devices, such as transceiver devices and the like.
进一步的,接入点可以与互联网协议(Internet Protocol,IP)网络进行通信。例如,因特网(internet)、私有的IP网或者其他数据网等。Further, the access point can communicate with an Internet Protocol (Internet Protocol, IP) network. For example, the Internet (internet), a private IP network or other data networks and the like.
具体的,站点可以是无线通讯芯片、无线传感器或无线通信终端。例如,支持Wi-Fi通讯功能的用户设备(user equipment,UE)、远程/远端终端(remote UE)、接入终端、用户单元、用户站、移动设备、用户终端、智能终端、无线通信设备、用户代理或用户装置/蜂窝电话、无绳电话、会话启动协议(session initiation protocol,SIP)电话、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)、手持设备、车载设备、可穿戴设备等,对此不作具体限定。Specifically, the station may be a wireless communication chip, a wireless sensor or a wireless communication terminal. For example, user equipment (user equipment, UE), remote/remote terminal (remote UE), access terminal, user unit, user station, mobile device, user terminal, intelligent terminal, wireless communication device supporting Wi-Fi communication function , user agent or user device/cellular phone, cordless phone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld equipment, in-vehicle equipment, wearable equipment, etc., which are not specifically limited.
进一步的,站点可以包括非接入点增强型高吞吐量站点(none AP extremelyhigh throughput station,non-AP EHT STA)和非接入点高效率站点(none AP highefficiency station,non-AP HE STA)等。Further, the stations may include non-AP extremelyhigh throughput stations (none AP extremelyhigh throughput station, non-AP EHT STA) and non-AP high-efficiency stations (none AP highefficiency station, non-AP HE STA), etc. .
进一步的,站点可以包括具有收发功能的装置,例如芯片系统。其中,该芯片系统可以包括芯片,还可以包括其它分立器件,如收发器件等。Further, the station may include a device with a transceiver function, such as a chip system. Wherein, the chip system may include a chip, and may also include other discrete devices, such as transceiver devices and the like.
结合上述描述,下面本申请实施例对一个基本服务集中的接入点和站点的无线通信系统做一个示例性说明。In combination with the above description, the following embodiments of the present application will give an exemplary description of a wireless communication system of an access point and a station in a basic service set.
示例性的,本申请实施例的无线通信系统,请参阅图1。无线通信系统10可以包括接入点110、站点120和站点130。其中,接入点110可以为特定的地理区域提供通信覆盖,并且可以与位于通信覆盖范围内的站点120和站点130进行通信。For example, please refer to FIG. 1 for the wireless communication system of the embodiment of the present application.
可选地,无线通信系统10还可以包括多个接入点,并且每个接入点的通信覆盖范围内可以包括一定数量的站点,对此不作具体限定。Optionally, the
可选地,无线通信系统10还可以包括接入网(radio access network,RAN)设备、核心网(core network,CN)设备、网络控制器、移动管理实体等其他网络实体,对此不作具体限定。Optionally, the
可选地,无线通信系统10中的接入点与站点之间的通信可以为无线通信或者有线通信,对此不作具体限制。Optionally, the communication between the access point and the station in the
在对本申请实施例提供时间分配方法进行详细介绍之前,再对本申请实施例所涉及的相关内容进行介绍。Before introducing the time allocation method provided by the embodiment of the present application in detail, the relevant content involved in the embodiment of the present application will be introduced.
1、触发帧(trigger frame,TF)1. Trigger frame (trigger frame, TF)
触发帧属于媒质接入控制(media access control,MAC)帧。其中,如图2所示,触发帧的帧结构(frame format)可以包括帧控制(Frame Control,FC)字段(field,或者称为域)、持续时间(Duration)字段、接收器地址(Rceiver address,RA)字段、发射器地址(Transmission address,TA)字段、一个公共信息(Common Information,Common Info)字段、至少一个用户信息(User Information,User Info)字段、填充(Padding)字段和帧校验序列(Frame Check Sequence,FCS)字段。The trigger frame belongs to a media access control (media access control, MAC) frame. Wherein, as shown in FIG. 2, the frame structure (frame format) of the trigger frame may include a frame control (Frame Control, FC) field (field, or domain), a duration (Duration) field, a receiver address (Receiver address) , RA) field, transmitter address (Transmission address, TA) field, a common information (Common Information, Common Info) field, at least one user information (User Information, User Info) field, padding (Padding) field and frame check Sequence (Frame Check Sequence, FCS) field.
需要说明的是,不同IEEE 802.11协议标准可能对触发帧所携带的字段有不同的规范。It should be noted that different IEEE 802.11 protocol standards may have different specifications for the fields carried in the trigger frame.
RA字段可以指示触发帧的接收器地址。当触发帧需要触发一个站点以传输数据时,RA字段可以指示该站点的MAC地址。当触发帧需要触发至少一个站点以传输数据时,RA字段可以指示广播地址。The RA field may indicate the receiver address of the trigger frame. When the trigger frame needs to trigger a station to transmit data, the RA field may indicate the MAC address of the station. When the trigger frame needs to trigger at least one station to transmit data, the RA field may indicate a broadcast address.
TA字段可以指示触发帧的发射器地址。当发送触发帧的接入点不使用多个BSSID时,TA字段可以指示该接入点的MAC地址。The TA field may indicate the transmitter address of the trigger frame. When the access point transmitting the trigger frame does not use multiple BSSIDs, the TA field may indicate the MAC address of the access point.
公共信息字段可以指示由触发帧触发的至少一个站点所需读取的信息。The public information field may indicate information that at least one station triggered by the trigger frame needs to read.
用户信息字段可以分别指示由触发帧触发的多个站点中的每个站点发送针对触发帧的响应所需的信息。具体的,触发帧可以包括至少一个用户信息字段。The user information field may respectively indicate information required for each of the plurality of stations triggered by the trigger frame to transmit a response to the trigger frame. Specifically, the trigger frame may include at least one user information field.
用户信息字段可以指示由触发帧触发的站点。也就是说,用户信息字段与该站点具有对应关系。其中,当用户信息字段包括关联标识符(association identifier,AID)信息时,该AID信息所指示的站点可以为由触发帧触发的站点或者该用户信息字段对应的站点。例如,用户信息字段中的AID12子字段可以指示由触发帧触发的站点的AID的12个最低有效位(least significant bit,LSB)。The user information field may indicate the station triggered by the trigger frame. That is to say, the user information field has a corresponding relationship with the site. Wherein, when the user information field includes association identifier (association identifier, AID) information, the site indicated by the AID information may be the site triggered by the trigger frame or the site corresponding to the user information field. For example, the AID12 subfield in the user information field may indicate 12 least significant bits (least significant bits, LSBs) of the AID of the station triggered by the trigger frame.
用户信息字段可以指示分配给由触发帧触发的站点的资源单元(resource unit,RU)。其中,该RU可以指示用于上行链路和下行链路传输的多个子载波。另外,用户信息字段中的RU分配子字段(RU allocation subfield)可以指示由该用户信息字段分配的一个或多个连续RU的起始RU。The user information field may indicate a resource unit (RU) allocated to a station triggered by the trigger frame. Wherein, the RU may indicate multiple subcarriers used for uplink and downlink transmission. In addition, the RU allocation subfield (RU allocation subfield) in the user information field may indicate the starting RU of one or more consecutive RUs allocated by the user information field.
填充字段可以包括填充比特。其中,填充字段可以用于确保发送针对触发帧的响应帧的站点准备响应帧传输的时间。因此,可以根据发送针对触发帧的响应帧的站点的能力来确定填充字段的长度。另外,触发帧可能不包括填充字段。The padding field may include padding bits. Wherein, the padding field may be used to ensure the time for the station sending the response frame to the trigger frame to prepare for the transmission of the response frame. Therefore, the length of the padding field may be determined according to the capability of the station sending the response frame to the trigger frame. Additionally, trigger frames may not include padding fields.
接入点可以使用触发帧来触发站点进行数据传输,如上行链路的数据传输、点对点(peer-to-peer,P2P)链路的数据传输。其中,上行链路的数据传输,可以理解为,站点向接入点传输数据;P2P链路的数据传输,可以理解为,一站点在P2P链路上向另一站点传输数据。The access point may use the trigger frame to trigger the station to perform data transmission, such as uplink data transmission and point-to-point (peer-to-peer, P2P) link data transmission. Wherein, the data transmission of the uplink can be understood as that a station transmits data to the access point; the data transmission of the P2P link can be understood as that one station transmits data to another station on the P2P link.
2、多用户请求发送(multi-user request to send,MU-RTS)触发帧2. Multi-user request to send (multi-user request to send, MU-RTS) trigger frame
触发帧的公共信息字段中的触发类型(trigger type)子字段可以指示该触发帧的类型。例如,在表1中,若触发类型子字段的值设置为3,则该触发帧的类型为MU-RTS,即该触发帧为MU-RTS触发帧。A trigger type (trigger type) subfield in the common information field of the trigger frame may indicate the type of the trigger frame. For example, in Table 1, if the value of the trigger type subfield is set to 3, the type of the trigger frame is MU-RTS, that is, the trigger frame is a MU-RTS trigger frame.
在IEEE 802.11ax协议标准中,MU-RTS触发帧中的公共信息字段的帧结构如图3所示。其中,该公共信息字段的帧结构包括触发类型(Trigger Type)子字段、上行长度(ULLength)子字段、More TF子字段、需要载波侦听(CS Required)子字段、上行带宽(UL BW)子字段、保护间隔+长训练序列类型(GI And LTF Type)子字段、MU-MIMO LTF模式(MU-MIMOLTF Mode)子字段、HE-LTF符号数和中间码周期(Number of HE-LTF Symbols andMidamble Periodicity)子字段、上行STBC(UL STBC)子字段、LPC、AP发射功率(AP TxPower)子字段、包拓展模糊度(PE Disambiguity)子字段、上行空间复用(UL SpatialReuse)子字段、多普勒(Doppler)子字段、高效率/极高吞吐量P160(HE/EHT P160)子字段、预留子字段等。In the IEEE 802.11ax protocol standard, the frame structure of the public information field in the MU-RTS trigger frame is shown in FIG. 3 . Wherein, the frame structure of the public information field includes a trigger type (Trigger Type) subfield, an uplink length (ULLength) subfield, a More TF subfield, a carrier sense required (CS Required) subfield, an uplink bandwidth (UL BW) subfield Field, guard interval + long training sequence type (GI And LTF Type) subfield, MU-MIMO LTF mode (MU-MIMOLTF Mode) subfield, HE-LTF symbol number and midamble period (Number of HE-LTF Symbols and Midamble Periodicity ) subfield, uplink STBC (UL STBC) subfield, LPC, AP transmit power (AP TxPower) subfield, packet expansion ambiguity (PE Disambiguity) subfield, uplink spatial multiplexing (UL SpatialReuse) subfield, Doppler (Doppler) subfield, high efficiency/extreme throughput P160 (HE/EHT P160) subfield, reserved subfield, etc.
在IEEE 802.11ax中,MU-RTS触发帧中的用户信息字段的帧结构如图4所示。其中,该用户信息字段的帧结构包括关联标识12(AID12)子字段、资源单元分配(RU Allocation)子字段、上行前向纠错码编码类型(UL FEC Coding Type)子字段、上行高效率调制与编码策略(UL HE-MCS)子字段、上行DCM子字段、SS分配/RA-RU信息子字段、上行目标接收功率(UL Target Receive Power)子字段、预留(Reserved)子字段等。In IEEE 802.11ax, the frame structure of the user information field in the MU-RTS trigger frame is shown in FIG. 4 . Among them, the frame structure of the user information field includes an association identifier 12 (AID12) subfield, a resource unit allocation (RU Allocation) subfield, an uplink forward error correction code coding type (UL FEC Coding Type) subfield, an uplink high-efficiency modulation And coding strategy (UL HE-MCS) subfield, uplink DCM subfield, SS allocation/RA-RU information subfield, uplink target received power (UL Target Receive Power) subfield, reserved (Reserved) subfield, etc.
表1Table 1
3、接入点辅助的单用户物理层协议数据单元(single user PHY protocol dataunit,SU PPDU)传输(AP assisted SU PPDU transmission)3. Access point-assisted single user physical layer protocol data unit (single user PHY protocol data unit, SU PPDU) transmission (AP assisted SU PPDU transmission)
IEEE 802.11be协议标准需要定义一种机制,使得接入点可以发送一个修改的MU-RTS触发帧(a modified MU-RTS trigger frame),该修改的MU-RTS触发帧可以用于分配TXOP内传输时间以传输至少一个非触发的PPDU(none tirgger based PPDU,non-TBPPDU)。其中,The IEEE 802.11be protocol standard needs to define a mechanism so that the access point can send a modified MU-RTS trigger frame (a modified MU-RTS trigger frame), which can be used to allocate TXOP transmission Time to transmit at least one non-trigger based PPDU (none tirgger based PPDU, non-TBPPDU). in,
(1)分配的TXOP内传输时间以该修改的MU-RTS触发帧的传输结束以起始;(1) The transmission time within the allocated TXOP starts with the end of transmission of the modified MU-RTS trigger frame;
(2)接入点是否可以通过该修改的MU-RTS触发帧请求站点应答清除发送(clearto send,CTS)帧是待定的;(2) Whether the access point can request the station to respond to the clear to send (clearto send, CTS) frame through the modified MU-RTS trigger frame is pending;
(3)该非触发的PPDU可以由站点发送给接入点;或者,该非触发的PPDU可以由站点通过点对点(peer to peer,P2P)链路发送给其他站点。(3) The non-triggered PPDU may be sent by the station to the access point; or, the non-triggered PPDU may be sent by the station to other stations through a peer-to-peer (P2P) link.
目前,IEEE 802.11ax协议标准只规定一个触发帧只能分配TXOP内的一段时间片(即TXOP内传输时间)用于一个或多个站点向接入点通过OFDMA的方式发送一个无线帧的场景(即一个触发帧触发向接入点传输一个无线帧)。然而,IEEE当前正在制定的下一代WLAN协议标准(如IEEE 802.11be)可能存在一个触发帧能分配TXOP内多段连续的时间片用于一站点向接入点或者其他站点发送无线帧的场景(即一个触发帧触发多个无线帧传输)。由于各个WLAN协议标准之间需要具备向后兼容性,因此在IEEE 802.11be等下一代WLAN协议标准需要兼容IEEE 802.11ax协议标准的情况下,如何将TXOP内传输时间分配给至少一个站点,还需要进一步研究。At present, the IEEE 802.11ax protocol standard only stipulates that a trigger frame can only allocate a period of time within the TXOP (that is, the transmission time within the TXOP) for the scenario where one or more stations send a wireless frame to the access point through OFDMA ( That is, a trigger frame triggers the transmission of a radio frame to the access point). However, the next-generation WLAN protocol standard (such as IEEE 802.11be) currently being formulated by IEEE may have a trigger frame that can allocate multiple consecutive time slices in the TXOP for a scenario where a station sends wireless frames to an access point or other stations (ie One trigger frame triggers multiple radio frame transmissions). Since each WLAN protocol standard needs to have backward compatibility, when the next-generation WLAN protocol standard such as IEEE 802.11be needs to be compatible with the IEEE 802.11ax protocol standard, how to allocate the transmission time in the TXOP to at least one station also needs to further research.
例如,IEEE 802.11be协议标准可以规定修改的MU-RTS触发帧的用户信息字段中的7个预留比特(B25-B31)用于分配TXOP内传输时间给至少一个站点,而将IEEE 802.11ax协议标准所规定的MU-RTS触发帧的公共信息字段中原有用于分配传输时间给一个站点的UL Length子字段(B4-B15)变为预留比特。然而,上述将用户信息字段中的7个预留比特(B25-B31)用于分配传输时间给至少一个站点的方式存在如下问题:For example, the IEEE 802.11be protocol standard may stipulate that the 7 reserved bits (B25-B31) in the user information field of the modified MU-RTS trigger frame are used to allocate the transmission time in the TXOP to at least one station, and the IEEE 802.11ax protocol The original UL Length subfields (B4-B15) used to allocate transmission time to a station in the public information field of the MU-RTS trigger frame specified in the standard become reserved bits. However, the above method of using the 7 reserved bits (B25-B31) in the user information field to allocate transmission time to at least one station has the following problems:
(1)修改的MU-RTS触发帧的帧结构将与现有其他触发帧的帧结构不一致,从而导致实现的复杂性;(1) The frame structure of the modified MU-RTS trigger frame will be inconsistent with the frame structure of other existing trigger frames, resulting in complexity of implementation;
(2)用户信息字段中的7个预留比特(B25-B31)都用掉之后,导致该用户信息字段中只剩下一个预留比特(B39),而不利于将来标准协议的演进。(2) After all the 7 reserved bits (B25-B31) in the user information field are used up, only one reserved bit (B39) remains in the user information field, which is not conducive to the evolution of standard protocols in the future.
结合上述描述,本申请实施例提供一种时间分配的流程示意图,请参阅图5,该方法包括:In combination with the above description, this embodiment of the present application provides a schematic flow chart of time allocation, please refer to Figure 5, the method includes:
S510、接入点发送触发帧,该触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,该触发帧包括一个公共信息字段和至少一个用户信息字段,该L的取值为大于或等于1的整数。S510, the access point sends a trigger frame, the trigger frame is used to allocate transmission time within the transmission opportunity TXOP to L stations to transmit wireless frames, the trigger frame includes a public information field and at least one user information field, the value of L is an integer greater than or equal to 1.
其中,该公共信息字段携带第一信息,第一信息用于指示该第一传输时间的第一信息;该用户信息字段携带第一信息,所述第二信息用于配置在该第一传输时间内分配给该用户信息字段对应的该L个站点中的站点的传输时间的第二信息。Wherein, the public information field carries first information, and the first information is used to indicate the first information of the first transmission time; the user information field carries first information, and the second information is used to configure the first information at the first transmission time. The second information of the transmission time allocated to the stations in the L stations corresponding to the user information field.
S520、站点获取该触发帧。S520. The station acquires the trigger frame.
需要说明的是,首先,IEEE 802.11ax协议标准只规定一个触发帧触发向接入点传输一个无线帧,而IEEE 802.11be等下一代WLAN协议标准可能需要对该触发帧进行修改以触发多个无线帧传输。It should be noted that, first of all, the IEEE 802.11ax protocol standard only stipulates that one trigger frame triggers the transmission of one wireless frame to the access point, while the next-generation WLAN protocol standards such as IEEE 802.11be may need to modify the trigger frame to trigger multiple wireless frames. frame transmission.
基于此,本申请实施例的接入点(AP)可以辅助(assiste)至少一个(即L个,L≥1)站点(STA)传输无线帧。其中,该接入点可以发送一个触发帧,该触发帧可以用于向该L个站点分配传输时间以传输无线帧,从而该L个站点可以在各自分配的传输时间内无需再竞争信道以传输无线帧,实现通过一个触发帧触发多个无线帧传输,进而提升信道利用效率。Based on this, the access point (AP) in the embodiment of the present application can assist (assiste) at least one (that is, L, L≧1) station (STA) to transmit the wireless frame. Wherein, the access point can send a trigger frame, and the trigger frame can be used to allocate transmission time to the L stations to transmit wireless frames, so that the L stations can no longer compete for channels to transmit radio frames within the allocated transmission time. The wireless frame can trigger the transmission of multiple wireless frames through one trigger frame, thereby improving the channel utilization efficiency.
其次,在各自分配的传输时间内,L个站点中的站点可以向接入点发送无线帧,也可以通过P2P链路向L个站点中的其他站点发送无线帧。可见,接入点可以通过向L个站点分配传输时间以辅助该L个站点进行无线帧传输。Secondly, within the respective allocated transmission time, the stations in the L stations can send wireless frames to the access point, and can also send wireless frames to other stations in the L stations through the P2P link. It can be seen that the access point can assist the L stations to perform wireless frame transmission by allocating transmission time to the L stations.
最后,为了保证各个WLAN协议标准所规定的触发帧的帧结构之间的一致性,以及实现将传输时间分配给至少一个站点,本申请实施例考虑对该触发帧进行修改的同时,保证修改的触发帧的帧结构与其他触发帧(不同协议版本所规定的同一类型或者不同类型的触发帧)的帧结构兼容或一致。其中,修改的触发帧的公共信息字段携带用于指示给L个站点分配的第一传输时间的第一信息,以及修改的触发帧的用户信息字段携带用于配置在该第一传输时间内分配给该用户信息字段对应的站点的传输时间的第二信息,从而通过第一信息和第二信息实现在第一传输时间内为L个站点中的每个站点分配各自的传输时间。Finally, in order to ensure the consistency between the frame structures of the trigger frames stipulated in various WLAN protocol standards, and to realize the allocation of transmission time to at least one station, the embodiment of the present application considers modifying the trigger frame while ensuring that the modified The frame structure of the trigger frame is compatible or consistent with the frame structure of other trigger frames (trigger frames of the same type or different types stipulated by different protocol versions). Wherein, the public information field of the modified trigger frame carries the first information used to indicate the first transmission time allocated to the L stations, and the user information field of the modified trigger frame carries the information used to configure the first transmission time allocated to the L stations. The second information of the transmission time of the station corresponding to the user information field is given, so that each station in the L stations is allocated a respective transmission time within the first transmission time through the first information and the second information.
具体的,第一传输时间可以用于表示该触发帧分配给L个站点的TXOP内传输时间的总时长。Specifically, the first transmission time may be used to indicate the total duration of transmission time in the TXOP allocated to the L stations by the trigger frame.
可以理解的是,接入点发送触发帧,该触发帧用于向L个站点分配TXOP内传输时间。其中,该触发帧的公共信息字段中的第一信息用于指示分配给L个站点的TXOP内传输时间的总时长;该触发帧的用户信息字段中的第二信息用于配置在该总时长内分配给该用户信息字段对应的站点的传输时间。It can be understood that the access point sends a trigger frame, where the trigger frame is used to allocate transmission time within the TXOP to the L stations. Wherein, the first information in the public information field of the trigger frame is used to indicate the total duration of the transmission time in the TXOP allocated to L stations; the second information in the user information field of the trigger frame is used to configure the total duration The transmission time assigned to the station corresponding to the user information field in the .
具体的,第一信息可以为该触发帧的公共信息字段中的一个子字段。其中,该子字段可以是现有802.11协议标准中的子字段,可以是802.11协议标准中重新定义、新定义或新增的子字段,对此不作具体限制。例如,如图3所示,第一信息可以为公共信息字段中的上行长度子字段(B4-B15)。Specifically, the first information may be a subfield in the common information field of the trigger frame. Wherein, the subfield may be a subfield in the existing 802.11 protocol standard, or may be a redefined, newly defined or newly added subfield in the 802.11 protocol standard, and there is no specific limitation on this. For example, as shown in FIG. 3, the first information may be the uplink length subfield (B4-B15) in the common information field.
需要说明的是,本申请实施例可以对该触发帧的公共信息字段所携带的子字段进行修改、重新定义、新定义或者新增以得到第一信息,该第一信息可以用于指示给L个站点分配的第一传输时间。It should be noted that, in this embodiment of the present application, the subfields carried in the public information field of the trigger frame may be modified, redefined, newly defined, or added to obtain the first information, which may be used to indicate to L The first transmission time assigned by each station.
具体的,第二信息可以为该触发帧的用户信息字段中的一个子字段。其中,该子字段可以是现有802.11协议标准中的子字段,可以是802.11协议标准中重新定义、新定义或新增的子字段,对此不作具体限制。Specifically, the second information may be a subfield in the user information field of the trigger frame. Wherein, the subfield may be a subfield in the existing 802.11 protocol standard, or may be a redefined, newly defined or newly added subfield in the 802.11 protocol standard, and there is no specific limitation on this.
例如,如图3所示,第二信息可以为用户信息字段中的时间分配子字段(B25-B31)。For example, as shown in FIG. 3, the second information may be the time allocation subfields (B25-B31) in the user information field.
具体的,第二信息可以为该触发帧的用户信息字段中的N个预留比特信息,该N的取值为大于或等于1的整数。其中,该N个预留比特信息可以是现有802.11协议标准中的预留比特,可以是重新定义、新定义或新增的预留比特,对此不作具体限制。Specifically, the second information may be N reserved bit information in the user information field of the trigger frame, where the value of N is an integer greater than or equal to 1. Wherein, the N reserved bit information may be reserved bits in the existing 802.11 protocol standard, or may be redefined, newly defined or newly added reserved bits, and there is no specific limitation on this.
例如,如图3所示,本申请实施例可以将用户信息字段的7个预留比特(B25-31)修改为N(1≤N<7)个预留比特,从而节省用户信息字段所占用的比特数。For example, as shown in Figure 3, the embodiment of the present application can modify the 7 reserved bits (B25-31) of the user information field to N (1≤N<7) reserved bits, thereby saving the occupation of the user information field the number of bits.
具体的,用户信息字段与L个站点中的站点具有对应关系,该对应关系可以由该用户信息字段中的关联标识符信息指示。Specifically, the user information field has a corresponding relationship with the sites in the L sites, and the corresponding relationship may be indicated by the association identifier information in the user information field.
其中,该关联标识符信息可以是关联标识符12子字段(B0-B11)。Wherein, the association identifier information may be the
需要说明的是,触发帧的用户信息字段中的AID12子字段可以指示该AID12子字段对应的站点。例如,如图2所示,触发帧携带L个用户信息字段,该L个用户信息字段在该触发帧的帧结构中具有一定的排列顺序,并且该L个用户信息字段中各个用户信息字段的AID12子字段指示一个站点,即该L个用户信息字段与L个站点一一对应,从而通过该触发帧触发L个站点。It should be noted that, the AID12 subfield in the user information field of the trigger frame may indicate the station corresponding to the AID12 subfield. For example, as shown in Figure 2, the trigger frame carries L user information fields, and the L user information fields have a certain arrangement order in the frame structure of the trigger frame, and each user information field in the L user information fields The AID12 subfield indicates a station, that is, the L user information fields are in one-to-one correspondence with the L stations, so that the L stations are triggered by the trigger frame.
具体的,第一传输时间以L个站点中的站点最开始传输无线帧的时刻为起始。Specifically, the first transmission time starts from the moment when a station among the L stations first transmits a radio frame.
需要说明的是,接入点可以发送触发帧以触发L个站点,并通过该触发帧向触发的L个站点分配一个第一传输时间,以及通过该触发帧在该总时长内给触发的L个站点中的站点分配各自的传输时间以传输无线帧。其中,本申请实施例可以将该L个站点中的站点最开始传输无线帧的时刻作为该第一传输时间的起始时刻。It should be noted that the access point may send a trigger frame to trigger L stations, allocate a first transmission time to the triggered L stations through the trigger frame, and assign a first transmission time to the triggered L stations within the total duration through the trigger frame. The stations in the stations allocate their respective transmission times to transmit radio frames. Wherein, in the embodiment of the present application, the moment when the station among the L stations first transmits the radio frame may be used as the starting moment of the first transmission time.
具体的,第一传输时间以L个站点中的第一站点开始传输无线帧的时刻为起始,第一站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第一个。Specifically, the first transmission time starts from the moment when the first station in the L stations starts to transmit the wireless frame, and the sequence positions of the user information fields corresponding to the first station in all non-special user information fields of the trigger frame are: First.
需要说明的是,触发帧的所有用户信息字段在该触发帧的帧结构中具有一定的排列顺序,并且该触发帧的所有用户信息字段中可能存在特殊用户信息字段(special userinfo field),而该特殊用户信息字段将不用于指示站点,即该特殊用户信息字段不对应站点。因此,本申请实施例将触发帧的所有用户信息字段中除特殊用户信息字段外的剩余用户信息字段,称为该触发帧的所有非特殊用户信息字段。It should be noted that all user information fields of the trigger frame have a certain order in the frame structure of the trigger frame, and there may be a special user information field (special userinfo field) in all user information fields of the trigger frame, and the The special user information field will not be used to indicate a site, that is, the special user information field does not correspond to a site. Therefore, in this embodiment of the present application, the remaining user information fields in all user information fields of the trigger frame except the special user information field are referred to as all non-special user information fields of the trigger frame.
然后,本申请实施例可以从该触发帧触发的L个站点中确定第一站点,该第一站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第一个,从而将该第一站点开始传输无线帧的时刻作为该第一传输时间的起始时刻。Then, in the embodiment of the present application, the first site can be determined from the L sites triggered by the trigger frame, and the user information field corresponding to the first site is ranked first in all non-special user information fields of the trigger frame. , so that the moment when the first station starts to transmit the radio frame is used as the starting moment of the first transmission time.
具体的,L个站点中各个站点的传输时间按照位置信息依次进行分配;其中,该位置信息用于表示L个站点中各个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置。Specifically, the transmission time of each station in the L stations is allocated sequentially according to the location information; wherein, the location information is used to represent the user information field corresponding to each station in the L stations in all non-special user information fields of the trigger frame Sort sequence position.
需要说明的是,由于站点对应的用户信息字段在该触发帧的所有非特殊用户信息字段中具有一定的排列顺序,因此本申请实施例的触发帧可以按照站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序对对该站点的传输时间进行前后分配,从而提高TXOP内传输时间分配的效率和准确性。It should be noted that, since the user information field corresponding to the site has a certain sequence in all non-special user information fields of the trigger frame, the trigger frame in the embodiment of the present application can be arranged according to the user information field corresponding to the site in the trigger frame. The sequence in all non-special user information fields allocates the transmission time of the station before and after, thereby improving the efficiency and accuracy of transmission time allocation in the TXOP.
例如,接入点发送的触发帧触发站点1、站点2和站点3,即该接入点辅助站点1、站点2和站点3进行无线帧传输。其中,站点1对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点2之前,站点2对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点3之前。因此,在该触发帧指示的第一传输时间内,该触发帧先分配站点1的传输时间,再分配站点2的传输时间,最后分配站点3的传输时间。For example, the trigger frame sent by the access point triggers the
结合上述描述,下面本申请实施例对如何通过触发帧分配L个站点中各个站点的传输时间进行具体说明。In combination with the foregoing description, the following embodiments of the present application will specifically describe how to allocate the transmission time of each of the L stations through a trigger frame.
方式一:method one:
具体的,L个站点中各个站点的传输时间是由第一传输时间、第二信息所指示的参数值、第三信息、第四信息确定的;第三信息用于表示各个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置;第四信息用于表示各个站点传输的无线帧之间是否存在帧间间隔。Specifically, the transmission time of each station in the L stations is determined by the first transmission time, the parameter value indicated by the second information, the third information, and the fourth information; the third information is used to indicate the user information corresponding to each station The sequence position of the field in all non-special user information fields of the trigger frame; the fourth information is used to indicate whether there is an interframe space between the wireless frames transmitted by each station.
其中,该帧间间隔可以包括短帧间间隔(short interframe space,SIFS)。Wherein, the interframe space may include a short interframe space (short interframe space, SIFS).
需要说明的是,第二信息所指示的参数值,可以是触发帧的用户信息字段中的N个预留比特信息所指示的参数值(value),并且该参数值可以用于配置该用户信息字段对应的站点的传输时间。同时,该触发帧可以包括多个用户信息字段,而不同的用户信息字段中的N个预留比特信息所指示的参数值可能不同,从而导致由该触发帧分配给不同的用户信息字段对应的站点的传输时间可能不同。It should be noted that the parameter value indicated by the second information may be the parameter value (value) indicated by the N reserved bit information in the user information field of the trigger frame, and the parameter value may be used to configure the user information The transmission time of the station corresponding to the field. At the same time, the trigger frame may include multiple user information fields, and the parameter values indicated by the N reserved bit information in different user information fields may be different, thus causing the trigger frame to be assigned to different user information fields corresponding to Transit times may vary from site to site.
例如,接入点发送的触发帧触发站点1和站点2,即该接入点辅助站点1和站点2进行无线帧传输。其中,站点1对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点2之前,并且站点1对应的用户信息字段中的第二信息所指示的参数值与站点2对应的用户信息字段中的第二信息所指示的参数值不同。因此,在该触发帧指示的第一传输时间内,该触发帧分配站点1的传输时间与分配站点2的传输时间可能不同。For example, the trigger frame sent by the access point triggers the
另外,为了避免各个站点发送的无线帧在信道上发生碰撞,一般需要在各个站点传输的无线帧之间设置帧间间隔。但是,由于本申请实施例的站点既可能发送无线帧,也可能接收无线帧,因此如果相邻两个站点不需要立即执行收发转换,该相邻两个站点传输的无线帧也可以不设置帧间间隔(具体在下文介绍)。基于此,在分配各个站点的传输时间时,本申请实施例还需要考虑各个站点传输的无线帧之间是否存在帧间间隔。In addition, in order to avoid collisions of wireless frames sent by various stations on the channel, it is generally necessary to set an inter-frame interval between wireless frames transmitted by various stations. However, since the stations in this embodiment of the present application may both send wireless frames and receive wireless frames, if the two adjacent stations do not need to perform transceiver switching immediately, the wireless frames transmitted by the two adjacent stations may not set frame Interval (details described below). Based on this, when allocating the transmission time of each station, the embodiment of the present application also needs to consider whether there is an inter-frame space between wireless frames transmitted by each station.
可见,在“方式一”中,L个站点中各个站点的传输时间是由触发帧中的第一信息所指示第一传输时间、该触发帧中的第二信息所指示的参数值、第三信息、第四信息决定的,从而有利于保证传输时间分配的效率和准确性,以及提升通信过程的鲁棒性。It can be seen that in "
举例说明1:如图6所示,接入点发送的触发帧触发站点1、站点2和站点3,即该接入点辅助站点1、站点2和站点3进行无线帧传输。其中,满足如下条件:Example 1: As shown in FIG. 6 , the trigger frame sent by the access point triggers
·该触发帧用于向站点1、站点2和站点3分配传输时间以传输无线帧;The trigger frame is used to allocate transmission time to
·该触发帧的公共信息字段中的第一信息所指示的传输时间的总时长为T;The total duration of the transmission time indicated by the first information in the public information field of the trigger frame is T;
·该触发帧的用户信息字段包括3个非特殊用户信息字段;其中,站点1对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点2之前,站点2对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点3之前;The user information field of the trigger frame includes 3 non-special user information fields; among them, the sequence position of the user information field corresponding to
·站点1对应的用户信息字段中的第二信息所指示的参数值为2,站点2对应的用户信息字段中的第二信息所指示的参数值为4,站点3对应的用户信息字段中的第二信息所指示的参数值为4;The parameter value indicated by the second information in the user information field corresponding to
·站点1与站点2传输的无线帧之间存在SIFS,站点2与站点3传输的无线帧之间存在SIFS;There is SIFS between the wireless frames transmitted by
·该触发帧分配的传输时间的总时长T以站点1开始传输无线帧的时刻为起始;The total duration T of the transmission time allocated by the trigger frame starts from the moment when
·该触发帧的传输结束的时刻与站点1开始传输无线帧的时刻之间存在SIFS;There is a SIFS between the moment when the transmission of the trigger frame ends and the moment when
因此,在该触发帧指示的第一传输时间T(即总时长为T)内,该触发帧先分配站点1的传输时间为“T/2”,再分配站点2的传输时间为“T/4-SIFS”,最后分配站点3的传输时间为“T/4-SIFS”。Therefore, within the first transmission time T indicated by the trigger frame (that is, the total duration is T), the trigger frame first allocates the transmission time of
综合“举例说明1”所述,若各个站点传输的无线帧之间存在SIFS时,则各个站点的传输时间满足如下关系:Based on the description in "Example 1", if there is a SIFS between the wireless frames transmitted by each station, the transmission time of each station satisfies the following relationship:
一站点的传输时间=T/(value_1);Transmission time of a station = T/(value_1);
其他站点的传输时间=(T/(value_2))-SIFS;Transmission time of other stations = (T/(value_2))-SIFS;
其中,该一站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第一个;T表示触发帧的公共信息字段中的第一信息指示的第一传输时间;value_1表示该一站点对应的用户信息字段中的N个预留比特信息指示的参数值;value_2表示该其他站点对应的用户信息字段中的N个预留比特信息指示的参数值。Wherein, the sequence position of the user information field corresponding to the station in all non-special user information fields of the trigger frame is the first; T represents the first transmission time indicated by the first information in the public information field of the trigger frame; value_1 indicates the parameter value indicated by the N reserved bit information in the user information field corresponding to the station; value_2 indicates the parameter value indicated by the N reserved bit information in the user information field corresponding to the other station.
举例说明2:如图7所示,接入点发送的触发帧触发站点1、站点2和站点3,即该接入点辅助站点1、站点2和站点3进行无线帧传输。其中,满足如下条件:Example 2: As shown in FIG. 7 , the trigger frame sent by the access point triggers
·该触发帧用于向站点1、站点2和站点3分配传输时间以传输无线帧;The trigger frame is used to allocate transmission time to
·该触发帧的公共信息字段中的第一信息所指示的传输时间的总时长为T;The total duration of the transmission time indicated by the first information in the public information field of the trigger frame is T;
·该触发帧的用户信息字段包括3个非特殊用户信息字段;其中,站点1对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点2之前,站点2对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点3之前;The user information field of the trigger frame includes 3 non-special user information fields; among them, the sequence position of the user information field corresponding to
·站点1对应的用户信息字段中的第二信息所指示的参数值为2,站点2对应的用户信息字段中的第二信息所指示的参数值为4,站点3对应的用户信息字段中的第二信息所指示的参数值为4;The parameter value indicated by the second information in the user information field corresponding to
·站点1与站点2传输的无线帧之间不存在SIFS,站点2与站点3传输的无线帧之间存在SIFS;There is no SIFS between the wireless frames transmitted by
·该触发帧分配的传输时间的总时长T以站点1开始传输无线帧的时刻为起始;The total duration T of the transmission time allocated by the trigger frame starts from the moment when
·该触发帧的传输结束的时刻与站点1开始传输无线帧的时刻之间存在SIFS;There is a SIFS between the moment when the transmission of the trigger frame ends and the moment when
因此,在该触发帧指示的第一传输时间T内,该触发帧先分配站点1的传输时间为“T/2”,再分配站点2的传输时间为“T/4”,最后分配站点3的传输时间为“T/4-SIFS”。Therefore, within the first transmission time T indicated by the trigger frame, the trigger frame first assigns the transmission time of
综合“举例说明2”所述,若一站点与另一站点传输的无线帧之间存在SIFS时,该另一站点的传输时间不设置SIFS。Based on what is described in "Example 2", if there is a SIFS between the wireless frames transmitted by one station and another station, the transmission time of the other station does not set the SIFS.
方式二:Method 2:
具体的,L个站点中各个站点的传输时间是由时间单位信息、第二信息所指示的参数值、第三信息、第四信息确定的;时间单位信息是由第一传输时间和预设参数确定的,预设参数的取值大于或者等于N的取值;第三信息用于表示各个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置;第四信息用于表示各个站点传输的无线帧之间是否存在帧间间隔。Specifically, the transmission time of each station in the L stations is determined by the time unit information, the parameter value indicated by the second information, the third information, and the fourth information; the time unit information is determined by the first transmission time and the preset parameter Determined, the value of the preset parameter is greater than or equal to the value of N; the third information is used to indicate the sequence position of the user information fields corresponding to each station in all non-special user information fields of the trigger frame; the fourth information is used Indicates whether there is an interframe space between radio frames transmitted by various stations.
其中,该帧间间隔可以包括短帧间间隔(short interframe space,SIFS)。Wherein, the interframe space may include a short interframe space (short interframe space, SIFS).
其中,该预设参数可以是由802.11标准协议规定的。Wherein, the preset parameter may be specified by the 802.11 standard protocol.
可见,在“方式二”中,L个站点中各个站点的传输时间是由触发帧中的第一信息所指示第一传输时间、预设参数、该触发帧中的第二信息所指示的参数值、第三信息、第四信息决定的,从而有利于保证传输时间分配的效率和准确性,以及提升通信过程的鲁棒性。It can be seen that in "
进一步的,时间单位信息可以满足如下:Further, the time unit information can be satisfied as follows:
TU=T/(2M)或T/(2M-1);TU=T/(2 M ) or T/(2 M -1);
其中,TU表示时间单位信息;T表示触发帧的公共信息字段中的第一信息指示的第一传输时间;M表示预设参数。Wherein, TU represents time unit information; T represents the first transmission time indicated by the first information in the common information field of the trigger frame; M represents a preset parameter.
其中,M=N,或者M=N+1,或者M>N。Wherein, M=N, or M=N+1, or M>N.
需要说明的是,若第二信息为用户信息字段中的N个预留比特信息,则该N个预留比特信息所指示的参数值的最大值可以为2N-1。当分配给一站点的传输时间为“TU*value_3”,且value_3表示该一站点对应的用户信息字段中的第二信息所指示的参数值时,由于TU等于T除以(2M-1),并且value_3的最大值为2N-1,因此可以保证分配给该一站点的传输时间不超出TXOP传输的总时长T。It should be noted that, if the second information is N reserved bit information in the user information field, the maximum value of the parameter value indicated by the N reserved bit information may be 2 N -1. When the transmission time allocated to a station is "TU*value_3", and value_3 represents the parameter value indicated by the second information in the user information field corresponding to the station, since TU is equal to T divided by (2 M -1) , and the maximum value of value_3 is 2 N -1, so it can be guaranteed that the transmission time allocated to this station does not exceed the total duration T of TXOP transmission.
举例说明3:如图8所示,接入点发送的触发帧触发站点1、站点2和站点3,即该接入点辅助站点1、站点2和站点3进行无线帧传输。其中,满足如下条件:Example 3: As shown in FIG. 8 , the trigger frame sent by the access point triggers
·该触发帧用于向站点1、站点2和站点3分配传输时间以传输无线帧;The trigger frame is used to allocate transmission time to
·该触发帧的公共信息字段中的第一信息所指示的传输时间的总时长为T;The total duration of the transmission time indicated by the first information in the public information field of the trigger frame is T;
·该触发帧的用户信息字段包括3个非特殊用户信息字段;其中,站点1对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点2之前,站点2对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点3之前;The user information field of the trigger frame includes 3 non-special user information fields; among them, the sequence position of the user information field corresponding to
·站点1对应的用户信息字段中的第二信息所指示的参数值为8,站点2对应的用户信息字段中的第二信息所指示的参数值为4,站点3对应的用户信息字段中的第二信息所指示的参数值为4;The parameter value indicated by the second information in the user information field corresponding to
·站点1与站点2传输的无线帧之间存在SIFS,站点2与站点3传输的无线帧之间存在SIFS;There is SIFS between the wireless frames transmitted by
·该触发帧分配的传输时间的总时长T以站点1开始传输无线帧的时刻为起始;The total duration T of the transmission time allocated by the trigger frame starts from the moment when
·该触发帧的传输结束的时刻与站点1开始传输无线帧的时刻之间存在SIFS;There is a SIFS between the moment when the transmission of the trigger frame ends and the moment when
因此,在该触发帧指示的第一传输时间T内,该触发帧先分配站点1的传输时间为“TU*8”,再分配站点2的传输时间为“TU*4-SIFS”,最后分配站点3的传输时间为“TU*4-SIFS”。Therefore, within the first transmission time T indicated by the trigger frame, the trigger frame first allocates the transmission time of
综合“举例说明1”所述,若各个站点传输的无线帧之间存在SIFS时,则各个站点的传输时间满足如下关系:Based on the description in "Example 1", if there is a SIFS between the wireless frames transmitted by each station, the transmission time of each station satisfies the following relationship:
一站点的传输时间=TU*(value_3);The transmission time of a station=TU*(value_3);
其他站点的传输时间=TU*(value_4)-SIFS;Transmission time of other stations = TU*(value_4)-SIFS;
TU=T/(2M)或T/(2M-1),且M≥N;TU=T/(2 M ) or T/(2 M -1), and M≥N;
其中,该一站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第一个;T表示触发帧的公共信息字段中的第一信息指示的第一传输时间;value_3表示该一站点对应的用户信息字段中的N个预留比特信息指示的参数值;value_4表示该其他站点对应的用户信息字段中的N个预留比特信息指示的参数值。Wherein, the sequence position of the user information field corresponding to the station in all non-special user information fields of the trigger frame is the first; T represents the first transmission time indicated by the first information in the public information field of the trigger frame; value_3 indicates the parameter value indicated by the N reserved bit information in the user information field corresponding to the station; value_4 indicates the parameter value indicated by the N reserved bit information in the user information field corresponding to the other station.
举例说明4:如图9所示,接入点发送的触发帧触发站点1、站点2和站点3,即该接入点辅助站点1、站点2和站点3进行无线帧传输。其中,满足如下条件:Example 4: As shown in FIG. 9 , the trigger frame sent by the access point triggers
·该触发帧用于向站点1、站点2和站点3分配传输时间以传输无线帧;The trigger frame is used to allocate transmission time to
·该触发帧的公共信息字段中的第一信息所指示的传输时间的总时长为T;The total duration of the transmission time indicated by the first information in the public information field of the trigger frame is T;
·该触发帧的用户信息字段包括3个非特殊用户信息字段;其中,站点1对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点2之前,站点2对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点3之前;The user information field of the trigger frame includes 3 non-special user information fields; among them, the sequence position of the user information field corresponding to
·站点1对应的用户信息字段中的第二信息所指示的参数值为8,站点2对应的用户信息字段中的第二信息所指示的参数值为4,站点3对应的用户信息字段中的第二信息所指示的参数值为4;The parameter value indicated by the second information in the user information field corresponding to
·站点1与站点2传输的无线帧之间不存在SIFS,站点2与站点3传输的无线帧之间存在SIFS;There is no SIFS between the wireless frames transmitted by
·该触发帧分配的传输时间的总时长T以站点1开始传输无线帧的时刻为起始;The total duration T of the transmission time allocated by the trigger frame starts from the moment when
·该触发帧的传输结束的时刻与站点1开始传输无线帧的时刻之间存在SIFS;There is a SIFS between the moment when the transmission of the trigger frame ends and the moment when
因此,在该触发帧指示的第一传输时间T内,该触发帧先分配站点1的传输时间为“TU*8”,再分配站点2的传输时间为“TU*4”,最后分配站点3的传输时间为“TU*4-SIFS”。Therefore, within the first transmission time T indicated by the trigger frame, the trigger frame first assigns the transmission time of
综合“举例说明4”所述,若一站点与另一站点传输的无线帧之间存在SIFS时,该另一站点的传输时间不设置SIFS。According to "Example 4", if there is SIFS between the radio frames transmitted by one station and another station, the transmission time of the other station does not set SIFS.
结合上述描述,下面对各个站点传输的所述无线帧之间是否存在帧间间隔进行具体说明。In combination with the foregoing description, the following specifically describes whether there is an inter-frame space between the wireless frames transmitted by each station.
具体的,L个站点包括第二站点和第三站点,第二站点传输无线帧的顺序在第三站点传输无线帧之前,且第二站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第三站点的前一个;若第二站点传输无线帧的接收器地址RA不是第三站点的媒体接入控制MAC地址,且第三站点传输无线帧的RA不是第二站点的MAC地址,以及公共信息字段中的要求载波侦听子字段为否,则第二站点传输的无线帧和第三站点传输的无线帧之间不存在帧间间隔。Specifically, the L stations include the second station and the third station, the order in which the second station transmits the wireless frame is before the third station transmits the wireless frame, and the user information field corresponding to the second station is in all non-special user information of the trigger frame The sequence position in the field is the previous one of the third station; if the receiver address RA of the second station transmitting the radio frame is not the medium access control MAC address of the third station, and the RA of the third station transmitting the radio frame is not the second If the MAC address of the station and the required carrier sense subfield in the public information field are No, there is no inter-frame space between the wireless frame transmitted by the second station and the wireless frame transmitted by the third station.
需要说明的是,站点在发送或者接收无线帧的过程中需要有一定时间进行收发转换,从而保证发送或接收成功。若第三站点传输无线帧的RA是第二站点的MAC地址,即第三站点需要传输无线帧给第二站点,由于第二站点传输无线帧的顺序在第三站点传输无线帧之前,因此为了保证第二站点的收发转换有一定的时间间隔,相邻的第二站点和第三站点传输无线帧的之间需要有帧间间隔。It should be noted that, in the process of sending or receiving the wireless frame, the station needs a certain period of time to perform the switching between sending and receiving, so as to ensure the success of sending or receiving. If the RA of the wireless frame transmitted by the third station is the MAC address of the second station, that is, the third station needs to transmit the wireless frame to the second station, since the order in which the second station transmits the wireless frame is before the third station transmits the wireless frame, so for It is ensured that there is a certain time interval between the sending and receiving of the second station, and there must be an inter-frame interval between the wireless frames transmitted by the adjacent second station and the third station.
另外,若触发帧的公共信息字段中的要求载波侦听子字段(CS requiredsubfield)设置为0,即该要求载波侦听子字段为否(false),则表示由该触发帧触发的站点不需要进行载波侦听。In addition, if the required carrier sense subfield (CS required subfield) in the public information field of the trigger frame is set to 0, that is, the required carrier sense subfield is false, it means that the station triggered by the trigger frame does not need Perform carrier sense.
可见,若第二站点传输无线帧的RA不是第三站点的MAC地址,且第三站点传输无线帧的RA不是第二站点的MAC地址,以及公共信息字段中的要求载波侦听子字段为否,则第二站点传输的无线帧和第三站点传输的无线帧之间不存在帧间间隔,从而节省帧间间隔的开销。It can be seen that if the RA of the wireless frame transmitted by the second station is not the MAC address of the third station, and the RA of the wireless frame transmitted by the third station is not the MAC address of the second station, and the required carrier sense subfield in the public information field is No , there is no interframe space between the radio frame transmitted by the second station and the radio frame transmitted by the third station, thereby saving the overhead of the interframe space.
结合上述图7和图9所示,若第二站点为“站点1”,第三站点为“站点2”,站点1传输无线帧的RA不是站点2的MAC地址,以及站点2传输无线帧的RA不是站点1的MAC地址,则站点1与站点2传输的无线帧之间不存在SIFS。Combining the above-mentioned figures 7 and 9, if the second station is "
结合上述描述,在“方式一”中,站点的传输时间可以等于T除以value_1,且value_1保证为非0值,即第二信息所指示的参数值为非0值。下面对第二信息所指示的参数值为0的情况进行说明。In conjunction with the above description, in "
具体的,L个站点包括第四站点和第五站点,第四站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第五站点的前一个;若第五站点对应的第二信息所指示的参数值为0,则分配给第五站点的传输时间与分配给第四站点的传输时间为重叠的相同时间段。Specifically, the L sites include the fourth site and the fifth site, and the order of arrangement of the user information field corresponding to the fourth site in all non-special user information fields of the trigger frame is the previous one of the fifth site; if the fifth site If the parameter value indicated by the corresponding second information is 0, then the transmission time allocated to the fifth station and the transmission time allocated to the fourth station are the same time period that overlaps.
可以理解是的,接入点可以通过触发帧的用户信息字段中的第二信息来向该用户信息字段对应的站点分配重叠的相同时间段,从而有利于保证传输时间分配的灵活性,优化传输时间的分配方式,提高传输时间分配的效率,以及节省传输时间。It can be understood that the access point can allocate the overlapping same time period to the station corresponding to the user information field by triggering the second information in the user information field of the frame, so as to ensure the flexibility of transmission time allocation and optimize transmission The time allocation method improves the efficiency of transmission time allocation and saves transmission time.
例如,接入点发送的触发帧触发站点1、站点2和站点3,即该接入点辅助站点1、站点2和站点3进行无线帧传输。其中,满足如下条件:For example, the trigger frame sent by the access point triggers the
·站点1对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点2之前,站点2对应的用户信息字段在该触发帧的所有非特殊用户信息字段中的排列顺序位置在站点3之前;The user information fields corresponding to
·站点1对应的用户信息字段中的第二信息所指示的参数值为非0,站点2对应的用户信息字段中的第二信息所指示的参数值为0,站点1对应的用户信息字段中的第二信息所指示的参数值为非0;The parameter value indicated by the second information in the user information field corresponding to
因此,在该触发帧指示的第一传输时间内,该触发帧分配给站点1的传输时间与分配站点2的传输时间为重叠的相同时间段。Therefore, within the first transmission time indicated by the trigger frame, the transmission time allocated to
进一步的,分配给第五站点的资源单元(RU)与分配给第四站点的资源单元不相同。Further, the resource unit (RU) allocated to the fifth site is different from the resource unit allocated to the fourth site.
可以理解的是,虽然在时域上,分配给第四站点的传输时间和第五站点的传输时间为重叠的相同时间段,但是在频域上,分配给第四站点的资源单元和第五站点的资源单元是不相同的,从而有利于避免在时频域上第四站点和第五站点传输的无线帧相互干扰,以及提高时频域资源的利用效率。It can be understood that, although in the time domain, the transmission time allocated to the fourth station and the transmission time of the fifth station overlap the same time period, but in the frequency domain, the resource units allocated to the fourth station and the fifth station The resource units of the stations are different, which is beneficial to avoid mutual interference of radio frames transmitted by the fourth station and the fifth station in the time-frequency domain, and improve utilization efficiency of time-frequency domain resources.
结合上述描述,触发帧可以向L个站点中的一部分站点分配重叠的相同时间段。另外,由于L个站点中的站点在传输无线帧时主要是按照该无线帧中的符号量(symbol)进行传输,因此该站点在其分配的传输时间内可能存在传输不完的符号量。下面对此进行说明。In combination with the above description, the trigger frame may allocate overlapping same time periods to some of the L stations. In addition, since a station in the L stations mainly transmits according to the number of symbols in the wireless frame when transmitting the radio frame, there may be symbols that cannot be completely transmitted by the station within the allocated transmission time. This is explained below.
具体的,L个站点包括第一站点组;第一站点组内的所有站点各自所分配的传输时间为重叠的相同时间段,且第一站点组内的所有站点各自对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置不为最后一个;第一站点组中的站点在该重叠的相同时间段中舍去传输不完的无线帧中的符号量。Specifically, the L stations include the first station group; the transmission time assigned by all the stations in the first station group is the same overlapping time period, and the corresponding user information fields of all the stations in the first station group are triggered The sequence positions in all non-special user information fields of the frame are not the last; the stations in the first station group discard the symbols in the wireless frames that cannot be completely transmitted in the overlapping same time period.
可以理解的是,在L个站点的非最后一个站点(该最后一个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为最后一个)中,可能存在一部分站点分配的传输时间为重叠的相同时间段。因此,本申请实施例可以将该一部分站点看作为第一站点组。另外,由于第一站点组中可能存在有站点在该重叠的相同时间段内传输不完符号量,因此本申请实施例考虑该站点舍弃传输不完的符号量,从而在分配的传输时间内避免数据传输错误。It can be understood that, in the non-last site of the L sites (the user information field corresponding to the last site is the last in the order of all non-special user information fields in the trigger frame), there may be a part of site allocation The transmission times are the same time slots that overlap. Therefore, in the embodiment of the present application, the part of sites may be regarded as the first site group. In addition, since there may be stations in the first station group that cannot transmit enough symbols during the overlapping same time period, this embodiment of the present application considers that the station discards the symbols that cannot be completely transmitted, so as to avoid Data transmission error.
例如,如图10所示,接入点发送的触发帧触发站点1、站点2和站点3,即该接入点辅助站点1、站点2和站点3进行无线帧传输。其中,第一站点组包括站点1和站点2,而站点3看作最后一个站点。同时,该触发帧分配给站点1的传输时间与分配给站点2的传输时间为重叠的相同时间段(“T/2”),而该触发帧分配给站点3的传输时间为“T/2-SIFS”。若站点2在该重叠的相同时间段内存在传输不完的数据,则站点2舍弃该传输不完的数据,即不传输该数据。For example, as shown in FIG. 10 , the trigger frame sent by the access point triggers
结合上述描述,下面对分配给最后一个站点(该最后一个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为最后一个)的传输时间需要占用完整个第一传输时间中的剩余时长进行说明。In combination with the above description, the transmission time allocated to the last station (the user information field corresponding to the last station is the last in the order of all non-special user information fields in the trigger frame) needs to occupy the entire first The remaining time in the transmission time is described.
具体的,L个站点包括第二站点组;第二站点组内的所有站点各自所分配的传输时间为重叠的相同时间段,且第二站点组内的一个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为最后一个;该重叠的相同时间段占用完第一传输时间中的剩余时长。Specifically, the L stations include the second station group; the transmission time allocated by all the stations in the second station group is the same overlapping time period, and the user information field corresponding to a station in the second station group is in the trigger frame The sequence position in all non-special user information fields of , is the last; the overlapping same time period takes up the remaining time in the first transmission time.
可以理解的是,分配给在L个站点中的最后一个站点的传输时间可能与一部分非最后一个站点分配的传输时间为重叠的相同时间段。因此,本申请实施例可以将该一部分非最后一个站点和该最后一个站点看作为第二站点组。同时,该重叠的相同时间段需要占用完整个由触发帧指示的第一传输时间中的剩余时长,从而有利于保证传输时间分配的准确性。It can be understood that the transmission time allocated to the last station among the L stations may overlap with the transmission time allocated to some non-last stations in the same time period. Therefore, in the embodiment of the present application, the part of the non-last site and the last site may be regarded as the second site group. At the same time, the overlapping same time period needs to occupy the remaining duration of the first transmission time indicated by the trigger frame, which is beneficial to ensure the accuracy of transmission time allocation.
例如,如图11所示,接入点发送的触发帧触发站点1、站点2和站点3,即该接入点辅助站点1、站点2和站点3进行无线帧传输。其中,第二站点组包括站点2和站点3,且站点3看作最后一个站点。同时,该触发帧分配给站点1的传输时间为“T/2”,而该触发帧分配给站点2的传输时间与分配给站点3的传输时间为重叠的相同时间段(“T/2-SIFS”),该重叠的相同时段占用完T的剩余时长。For example, as shown in FIG. 11 , the trigger frame sent by the access point triggers
结合上述描述,由于L个站点中的非最后一个站点在传输无线帧时主要是按照该无线帧中的符号量(symbol)进行传输,因此该站点在其分配的传输时间内可能存在传输不完的符号量。下面对此进行说明。In combination with the above description, since the non-last station among the L stations mainly transmits according to the number of symbols in the radio frame when transmitting a radio frame, the station may have incomplete transmission within its allocated transmission time. amount of symbols. This is explained below.
具体的,L个站点中的第六站点在第一传输时间内分配给第六站点的传输时间中舍去传输不完的无线帧中的符号量;第六站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置不为最后一个。Specifically, in the transmission time allocated to the sixth station in the first transmission time, the sixth station among the L stations discards the number of symbols in wireless frames that cannot be completely transmitted; the user information field corresponding to the sixth station is in the trigger frame The sort order position in all non-special user information fields of is not the last.
可以理解的是,第六站点可以看作非最后一个站点。由于非最后一个站点在其分配的传输时间内可能存在传输不完的符号量,因此本申请实施例考虑该非最后一个站点舍弃传输不完的符号量,从而在分配的传输时间内避免数据传输错误。It is understandable that the sixth station can be regarded as not the last station. Since the non-last station may have symbols that cannot be transmitted within the allocated transmission time, the embodiment of the present application considers that the non-last station discards the symbols that cannot be transmitted, so as to avoid data transmission within the allocated transmission time mistake.
结合上述描述,下面对分配给最后一个站点的传输时间需要占用完整个第一传输时间中的剩余时长进行说明。In combination with the above description, the transmission time allocated to the last station needs to occupy the remaining duration of the entire first transmission time.
具体的,在第一传输时间内分配给L个站点中的第七站点的传输时间占用完第一传输时间中的剩余时长;第七站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为最后一个。Specifically, the transmission time allocated to the seventh station among the L stations within the first transmission time takes up the remaining duration in the first transmission time; the user information field corresponding to the seventh station is included in all non-special user information in the trigger frame The sort order position in the field is last.
可以理解的是,第七站点可以看作最后一个站点。因此,分配给最后一个站点的传输时间需要占用完整个由触发帧指示的第一传输时间中的剩余时长,从而有利于保证传输时间分配的准确性。It is understandable that the seventh station can be regarded as the last station. Therefore, the transmission time allocated to the last station needs to occupy the entire remaining duration of the first transmission time indicated by the trigger frame, which is beneficial to ensure the accuracy of transmission time allocation.
结合上述描述,下面对L个站点中存在一部分站点传输的无线帧不会用完其分配的传输时间的情况进行说明。In combination with the above description, the following describes the situation that some of the L stations transmit wireless frames that do not use up their allocated transmission time.
具体的,若L个站点中的第八站点传输的无线帧不足以用完在第一传输时间内分配给第八站点的传输时间,则在第八站点传输的无线帧中添加填充数据;第八站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为任一个。Specifically, if the wireless frame transmitted by the eighth station among the L stations is not enough to use up the transmission time allocated to the eighth station within the first transmission time, then add padding data to the wireless frame transmitted by the eighth station; The sequence position of the user information fields corresponding to the eight stations in all non-special user information fields of the trigger frame is any one.
可以理解的是,第八站点可以看作L个站点中的任一个站点。因此,本申请实施例可以对第八站点传输的无线帧进行数据填充(padding),保证填充后的无线帧能够用完其分配的传输时间,从而有利于保证传输时间分配的准确性。It can be understood that the eighth site can be regarded as any one of the L sites. Therefore, in the embodiment of the present application, data padding can be performed on the wireless frame transmitted by the eighth station to ensure that the padded wireless frame can use up its allocated transmission time, thereby helping to ensure the accuracy of transmission time allocation.
结合上述描述,本申请实施例的触发帧还可以包括用于指示L个站点中的站点应答清除发送(clear to send,CTS)帧的信息。With reference to the above description, the trigger frame in this embodiment of the present application may further include information for instructing a station among the L stations to respond to a clear to send (CTS) frame.
需要说明的是,为了解决“隐藏站点(hidden Stations)”的问题,802.11协议标准提出RTS/CTS机制。因此,本申请实施例的触发帧可以指示其触发的L个站点是否应答CTS帧,以判断信道是否空闲,避免数据碰撞或冲突。It should be noted that, in order to solve the problem of "hidden stations (hidden stations)", the 802.11 protocol standard proposes an RTS/CTS mechanism. Therefore, the trigger frame in this embodiment of the present application may indicate whether the L stations triggered by it respond to the CTS frame, so as to determine whether the channel is idle, and avoid data collision or conflict.
下面对L站点需要向接入点应答CTS帧时,各个站点的传输时间的分配进行示例说明。In the following, when the station L needs to reply the CTS frame to the access point, the distribution of the transmission time of each station will be illustrated as an example.
例如,如图12和图13。由于触发帧指示的第一传输时间以L个站点中的站点最开始传输所述无线帧的时刻为起始,因此L个站点是否应答CTS帧可能将不影响各个站点的传输时间的分配。For example, see Figure 12 and Figure 13. Since the first transmission time indicated by the trigger frame starts from the moment when the station in the L stations first transmits the wireless frame, whether the L stations respond to the CTS frame may not affect the transmission time allocation of each station.
结合上述描述,本申请实施例的触发帧可以为MU-RTS触发帧。With reference to the above description, the trigger frame in this embodiment of the present application may be an MU-RTS trigger frame.
需要说明的是,如图2和表1所示,若该触发帧的公共信息字段中的触发类型(trigger type)子字段(B0-B3)的值设置为3,则该触发帧为MU-RTS触发帧。It should be noted that, as shown in Figure 2 and Table 1, if the value of the trigger type (trigger type) subfield (B0-B3) in the common information field of the trigger frame is set to 3, then the trigger frame is MU- RTS trigger frame.
结合上述描述,本申请实施例的无线帧可以包括管理帧、单用户物理层协议数据单元(SU PPDU)或者非触发的物理层协议数据单元(non-TB PPDU)中的之一。With reference to the above description, the wireless frame in this embodiment of the present application may include one of a management frame, a single-user physical layer protocol data unit (SU PPDU) or a non-triggered physical layer protocol data unit (non-TB PPDU).
需要说明的是,该管理帧可以由站点发送给接入点;或者,该管理帧可以由站点通过P2P链路发送给其他站点;或者,该非触发的PPDU可以由站点发送给接入点;或者,该非触发的PPDU可以由站点通过P2P链路发送给其他站点。It should be noted that the management frame may be sent by the station to the access point; or, the management frame may be sent by the station to other stations through a P2P link; or, the non-triggered PPDU may be sent by the station to the access point; Alternatively, the non-triggered PPDU may be sent by the station to other stations through the P2P link.
上述主要从方法侧的角度对本申请实施例的方案进行了介绍。可以理解的是,接入点或站点为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该知悉,结合本文中所公开的实施例描述的各示例的方法、模块、单元或者算法步骤,本申请能够以硬件或者硬件与计算机软件的结合形式来实现。某个方法、功能、模块、单元或者步骤究竟以硬件或计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用使用不同方法来实现所描述的方法、功能、模块、单元或者步骤,但是这种实现不应认为超出本申请的范围。The foregoing mainly introduces the solutions of the embodiments of the present application from the perspective of the method side. It can be understood that, in order to realize the above functions, the access point or station includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should know that, in combination with the methods, modules, units or algorithm steps described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain method, function, module, unit or step is executed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods for each specific application to implement the described methods, functions, modules, units or steps, but such implementation should not be regarded as exceeding the scope of the present application.
本申请实施例可以根据上述方法示例对接入点或站点进行功能单元/模块的划分。例如,可以对应各个功能划分各个功能单元/模块,也可以将两个或两个以上的功能集成在一个功能单元/模块中。上述集成的功能单元/模块既可以采用硬件的方式实现,也可以采用软件程序的方式实现。需要说明的是,本申请实施例中对功能单元/模块的划分是示意性的,只是一种逻辑功能划分,而实际实现时可以有另外的划分方式。In this embodiment of the present application, functional units/modules may be divided into access points or stations according to the foregoing method examples. For example, each functional unit/module may be divided corresponding to each function, or two or more functions may be integrated into one functional unit/module. The above-mentioned integrated functional units/modules can be implemented not only in the form of hardware, but also in the form of software programs. It should be noted that the division of functional units/modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.
在采用集成的单元/模块的情况下,图14提供了一种时间分配装置的功能单元组成框图。时间分配装置1400包括:处理单元1402和通信单元1403。处理单元1402用于对接入点的动作进行控制管理。例如,处理单元1402用于支持接入点执行图5中的步骤以及用于本申请所描述的技术方案的其它过程。通信单元1403用于支持接入点与无线通信系统中的其他设备之间的通信。时间分配装置1400还可以包括存储单元1401,用于时间分配装置1400所执行的程序代码和所传输的数据。In the case of using integrated units/modules, FIG. 14 provides a block diagram of functional units of a time distribution device. The
需要说明的是,时间分配装置1400可以是芯片或者芯片模组。It should be noted that the
其中,处理单元1402可以是处理器或控制器,例如可以是中央处理器(centralprocessing unit,CPU)、通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application-specific integrated circuit,ASIC)、现场可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框、模块和电路。处理单元1402也可以是实现计算功能的组合,例如包含一个或多个微处理器组合、DSP和微处理器的组合等等。通信单元1403可以是通信接口、收发器、收发电路等,存储单元1401可以是存储器。当处理单元1402为处理器,通信单元1403为通信接口,存储单元1401为存储器时,本申请实施例所涉及的时间分配装置1400可以为图16所示的接入点。Wherein, the
具体的,处理单元1402用于执行如上述方法实施例中由接入点执行的任一步骤,且在执行诸如发送等数据传输时,可选择的调用通信单元1403来完成相应操作。下面进行详细说明。Specifically, the
处理单元1402用于:发送触发帧,触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,触发帧包括一个公共信息字段和至少一个用户信息字段,L的取值为大于或等于1的整数;其中,公共信息字段携带第一信息,第一信息用于指示第一传输时间;用户信息字段携带第二信息,第二信息用于配置在第一传输时间内分配给用户信息字段对应的L个站点中的站点的传输时间。The
可以看出,时间分配装置1400发送触发帧,该触发帧用于向L个站点分配TXOP内传输时间以传输无线帧,该触发帧包括一个公共信息字段和至少一个用户信息字段,L的取值为大于或等于1的整数。由于该触发帧的公共信息字段携带有用于指示该第一传输时间的第一信息,以及该触发帧的用户信息字段携带有用于配置在该第一传输时间内分配给该用户信息字段对应的L个站点中的站点的传输时间的第二信息,从而通过该触发帧实现在该第一传输时间内为L个站点中的每个站点分配各自的传输时间,保证各个WLAN协议标准所规定的触发帧的帧结构之间具有兼容性和一致性,实现通过一个触发帧触发多个无线帧传输,进而提升信道利用效率。It can be seen that the
需要说明的是,图14所述实施例中各个操作的具体实现可以详见上述图5所示的方法实施例中的描述,在此不再赘述。It should be noted that, for the specific implementation of each operation in the embodiment shown in FIG. 14 , refer to the description in the method embodiment shown in FIG. 5 above, and details are not repeated here.
具体的,第一信息为公共信息字段中的上行长度子字段。Specifically, the first information is the uplink length subfield in the common information field.
具体的,用户信息字段与L个站点中的站点具有对应关系,对应关系由用户信息字段中的关联标识符信息指示。Specifically, the user information field has a corresponding relationship with the sites in the L sites, and the corresponding relationship is indicated by the association identifier information in the user information field.
具体的,第一传输时间以L个站点中的站点最开始传输无线帧的时刻为起始;或者,第一传输时间以L个站点中的第一站点开始传输无线帧的时刻为起始,第一站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第一个。Specifically, the first transmission time starts from the moment when the station in the L stations first transmits the wireless frame; or, the first transmission time starts from the moment when the first station in the L stations starts to transmit the wireless frame, The sequence position of the user information field corresponding to the first station is the first in all non-special user information fields of the trigger frame.
具体的,L个站点中各个站点的传输时间按照位置信息依次进行分配;位置信息用于表示L个站点中各个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置。Specifically, the transmission time of each station in the L stations is allocated sequentially according to the location information; the location information is used to indicate the sequence position of the user information fields corresponding to each station in the L stations in all non-special user information fields of the trigger frame .
具体的,第二信息为用户信息字段中的N个预留比特信息,N的取值为大于或等于1的整数。Specifically, the second information is N reserved bit information in the user information field, and the value of N is an integer greater than or equal to 1.
具体的,L个站点中各个站点的传输时间是由第一传输时间、第二信息所指示的参数值、第三信息、第四信息确定的;第三信息用于表示各个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置;第四信息用于表示各个站点传输的无线帧之间是否存在帧间间隔。Specifically, the transmission time of each station in the L stations is determined by the first transmission time, the parameter value indicated by the second information, the third information, and the fourth information; the third information is used to indicate the user information corresponding to each station The sequence position of the field in all non-special user information fields of the trigger frame; the fourth information is used to indicate whether there is an interframe space between the wireless frames transmitted by each station.
具体的,L个站点中各个站点的传输时间是由时间单位信息、第二信息所指示的参数值、第三信息、第四信息确定的;时间单位信息是由第一传输时间和预设参数确定的,预设参数的取值大于或者等于N的取值。Specifically, the transmission time of each station in the L stations is determined by the time unit information, the parameter value indicated by the second information, the third information, and the fourth information; the time unit information is determined by the first transmission time and the preset parameter Definitely, the value of the preset parameter is greater than or equal to the value of N.
具体的,L个站点包括第二站点和第三站点,第二站点传输无线帧的顺序在第三站点传输无线帧之前,且第二站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第三站点的前一个;若第二站点传输无线帧的接收器地址RA不是第三站点的媒体接入控制MAC地址,且第三站点传输无线帧的RA不是第二站点的MAC地址,以及公共信息字段中的要求载波侦听子字段为否,则第二站点传输的无线帧和第三站点传输的无线帧之间不存在帧间间隔。Specifically, the L stations include the second station and the third station, the order in which the second station transmits the wireless frame is before the third station transmits the wireless frame, and the user information field corresponding to the second station is in all non-special user information of the trigger frame The sequence position in the field is the previous one of the third station; if the receiver address RA of the second station transmitting the radio frame is not the medium access control MAC address of the third station, and the RA of the third station transmitting the radio frame is not the second If the MAC address of the station and the required carrier sense subfield in the public information field are No, there is no inter-frame space between the wireless frame transmitted by the second station and the wireless frame transmitted by the third station.
具体的,L个站点包括第四站点和第五站点,第四站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第五站点的前一个;若第五站点对应的第二信息所指示的参数值为0,则分配给第五站点的传输时间与分配给第四站点的传输时间为重叠的相同时间段。Specifically, the L sites include the fourth site and the fifth site, and the order of arrangement of the user information field corresponding to the fourth site in all non-special user information fields of the trigger frame is the previous one of the fifth site; if the fifth site If the parameter value indicated by the corresponding second information is 0, then the transmission time allocated to the fifth station and the transmission time allocated to the fourth station are the same time period that overlaps.
具体的,分配给第五站点的资源单元与分配给第四站点的资源单元不相同。Specifically, the resource units allocated to the fifth site are different from the resource units allocated to the fourth site.
具体的,L个站点包括第一站点组;第一站点组内的所有站点各自所分配的传输时间为重叠的相同时间段,且第一站点组内的所有站点各自对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置不为最后一个;第一站点组中的站点在该重叠的相同时间段中舍去传输不完的无线帧中的符号量。Specifically, the L stations include the first station group; the transmission time assigned by all the stations in the first station group is the same overlapping time period, and the corresponding user information fields of all the stations in the first station group are triggered The sequence positions in all non-special user information fields of the frame are not the last; the stations in the first station group discard the symbols in the wireless frames that cannot be completely transmitted in the overlapping same time period.
具体的,L个站点包括第二站点组;第二站点组内的所有站点各自所分配的传输时间为重叠的相同时间段,且第二站点组内的一个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为最后一个;该重叠的相同时间段占用完第一传输时间中的剩余时长。Specifically, the L stations include the second station group; the transmission time allocated by all the stations in the second station group is the same overlapping time period, and the user information field corresponding to a station in the second station group is in the trigger frame The sequence position in all non-special user information fields of , is the last; the overlapping same time period takes up the remaining time in the first transmission time.
具体的,L个站点中的第六站点在第一传输时间内分配给第六站点的传输时间中舍去传输不完的无线帧中的符号量;第六站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置不为最后一个。Specifically, in the transmission time allocated to the sixth station in the first transmission time, the sixth station among the L stations discards the number of symbols in wireless frames that cannot be completely transmitted; the user information field corresponding to the sixth station is in the trigger frame The sort order position in all non-special user information fields of is not the last.
具体的,在第一传输时间内分配给L个站点中的第七站点的传输时间占用完第一传输时间中的剩余时长;第七站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为最后一个。Specifically, the transmission time allocated to the seventh station among the L stations within the first transmission time takes up the remaining duration in the first transmission time; the user information field corresponding to the seventh station is included in all non-special user information in the trigger frame The sort order position in the field is last.
具体的,若L个站点中的第八站点传输的无线帧不足以用完在第一传输时间内分配给第八站点的传输时间,则在第八站点传输的无线帧中添加填充数据;第八站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为任一个。Specifically, if the wireless frame transmitted by the eighth station among the L stations is not enough to use up the transmission time allocated to the eighth station within the first transmission time, then add padding data to the wireless frame transmitted by the eighth station; The sequence position of the user information fields corresponding to the eight stations in all non-special user information fields of the trigger frame is any one.
具体的,触发帧还包括用于指示L个站点中的站点应答清除发送CTS帧的信息。Specifically, the trigger frame further includes information for instructing a station in the L stations to respond to a clear-to-send CTS frame.
具体的,触发帧为MU-RTS触发帧。Specifically, the trigger frame is a MU-RTS trigger frame.
具体的,无线帧包括管理帧、单用户物理层协议数据单元SU PPDU或者非触发的物理层协议数据单元non-TB PPDU中的之一。Specifically, the radio frame includes one of a management frame, a single-user physical layer protocol data unit SU PPDU, or a non-triggered physical layer protocol data unit non-TB PPDU.
在采用集成的单元/模块的情况下,图15提供了又一种时间分配装置的功能单元组成框图。时间分配装置1500包括:处理单元1502和通信单元1503。处理单元1502用于对站点的动作进行控制管理。例如,处理单元1502用于支持站点执行图5中的步骤以及用于本申请所描述的技术方案的其它过程。通信单元1503用于支持站点与无线通信系统中的其他设备之间的通信。时间分配装置1500还可以包括存储单元1501,用于存储时间分配装置1500所执行的程序代码和所传输的数据。In the case of using integrated units/modules, Fig. 15 provides a block diagram of functional units of another time distribution device. The
需要说明的是,时间分配装置1500可以是芯片或者芯片模组。It should be noted that the
其中,处理单元1502可以是处理器或控制器,例如可以是中央处理器(centralprocessing unit,CPU)、通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application-specific integrated circuit,ASIC)、现场可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框、模块和电路。处理单元1502也可以是实现计算功能的组合,例如包含一个或多个微处理器组合、DSP和微处理器的组合等等。通信单元1503可以是通信接口、收发器、收发电路等,存储单元1501可以是存储器。当处理单元1502为处理器,通信单元1503为通信接口,存储单元1501为存储器时,本申请实施例所涉及的时间分配装置1500可以为图17所示的站点。Wherein, the
具体实现时,处理单元1502用于执行如上述方法实施例中由站点执行的任一步骤,且在执行诸如发送等数据传输时,可选择的调用通信单元1503来完成相应操作。下面进行详细说明。During specific implementation, the
处理单元1502用于:获取触发帧,触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,触发帧包括一个公共信息字段和至少一个用户信息字段,L为大于或等于1的整数;其中,公共信息字段携带第一信息,第一信息用于指示第一传输时间;用户信息字段携带第二信息,第二信息用于配置在第一传输时间内分配给用户信息字段对应的L个站点中的站点的传输时间。The
需要说明的是,图15所述实施例中各个操作的具体实现可以详见上述图5所示的方法实施例中的描述,在此不再赘述。It should be noted that, for the specific implementation of each operation in the embodiment shown in FIG. 15 , refer to the description in the method embodiment shown in FIG. 5 above, and details are not repeated here.
可以看出,时间分配装置1500获取该触发帧,该触发帧用于向L个站点分配TXOP内传输时间以传输无线帧,该触发帧包括一个公共信息字段和至少一个用户信息字段,L的取值为大于或等于1的整数。由于该触发帧的公共信息字段携带有用于指示该第一传输时间的第一信息,以及该触发帧的用户信息字段携带有用于配置在该第一传输时间内分配给该用户信息字段对应的L个站点中的站点的传输时间的第二信息,从而通过该触发帧实现在该第一传输时间内为L个站点中的每个站点分配各自的传输时间,保证各个WLAN协议标准所规定的触发帧的帧结构之间具有兼容性和一致性,实现通过一个触发帧触发多个无线帧传输,进而提升信道利用效率。It can be seen that the
具体的,第一信息为公共信息字段中的上行长度子字段。Specifically, the first information is the uplink length subfield in the common information field.
具体的,用户信息字段与L个站点中的站点具有对应关系,对应关系由用户信息字段中的关联标识符子字段指示。Specifically, the user information field has a corresponding relationship with the sites in the L sites, and the corresponding relationship is indicated by the association identifier subfield in the user information field.
具体的,第一传输时间以L个站点中的站点最开始传输无线帧的时刻为起始;或者,第一传输时间以L个站点中的第一站点开始传输无线帧的时刻为起始,第一站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第一个Specifically, the first transmission time starts from the moment when the station in the L stations first transmits the wireless frame; or, the first transmission time starts from the moment when the first station in the L stations starts to transmit the wireless frame, The sequence position of the user information field corresponding to the first site in all non-special user information fields of the trigger frame is the first
具体的,L个站点中各个站点的传输时间按照位置信息依次进行分配;位置信息用于表示L个站点中各个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置。Specifically, the transmission time of each station in the L stations is allocated sequentially according to the location information; the location information is used to indicate the sequence position of the user information fields corresponding to each station in the L stations in all non-special user information fields of the trigger frame .
具体的,第二信息为用户信息字段中的N个预留比特信息,N的取值为大于或等于1的整数。Specifically, the second information is N reserved bit information in the user information field, and the value of N is an integer greater than or equal to 1.
具体的,L个站点中各个站点的传输时间是由第一传输时间、第二信息所指示的参数值、第三信息、第四信息确定的;第三信息用于表示各个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置;第四信息用于表示各个站点传输的无线帧之间是否存在帧间间隔。Specifically, the transmission time of each station in the L stations is determined by the first transmission time, the parameter value indicated by the second information, the third information, and the fourth information; the third information is used to indicate the user information corresponding to each station The sequence position of the field in all non-special user information fields of the trigger frame; the fourth information is used to indicate whether there is an interframe space between the wireless frames transmitted by each station.
具体的,L个站点中各个站点的传输时间是由时间单位信息、第二信息所指示的参数值、第三信息、第四信息确定的;时间单位信息是由第一传输时间和预设参数确定的,预设参数的取值大于或者等于N的取值。Specifically, the transmission time of each station in the L stations is determined by the time unit information, the parameter value indicated by the second information, the third information, and the fourth information; the time unit information is determined by the first transmission time and the preset parameter Definitely, the value of the preset parameter is greater than or equal to the value of N.
具体的,L个站点包括第二站点和第三站点,第二站点传输无线帧的顺序在第三站点传输无线帧之前,且第二站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第三站点的前一个;若第二站点传输无线帧的接收器地址RA不是第三站点的媒体接入控制MAC地址,且第三站点传输无线帧的RA不是第二站点的MAC地址,以及公共信息字段中的要求载波侦听子字段为否,则第二站点传输的无线帧和第三站点传输的无线帧之间不存在帧间间隔。Specifically, the L stations include the second station and the third station, the order in which the second station transmits the wireless frame is before the third station transmits the wireless frame, and the user information field corresponding to the second station is in all non-special user information of the trigger frame The sequence position in the field is the previous one of the third station; if the receiver address RA of the second station transmitting the radio frame is not the medium access control MAC address of the third station, and the RA of the third station transmitting the radio frame is not the second If the MAC address of the station and the required carrier sense subfield in the public information field are No, there is no inter-frame space between the wireless frame transmitted by the second station and the wireless frame transmitted by the third station.
具体的,L个站点包括第四站点和第五站点,第四站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为第五站点的前一个;若第五站点对应的第二信息所指示的参数值为0,则分配给第五站点的传输时间与分配给第四站点的传输时间为重叠的相同时间段。Specifically, the L sites include the fourth site and the fifth site, and the order of arrangement of the user information field corresponding to the fourth site in all non-special user information fields of the trigger frame is the previous one of the fifth site; if the fifth site If the parameter value indicated by the corresponding second information is 0, then the transmission time allocated to the fifth station and the transmission time allocated to the fourth station are the same time period that overlaps.
具体的,分配给第五站点的资源单元与分配给第四站点的资源单元不相同。Specifically, the resource units allocated to the fifth site are different from the resource units allocated to the fourth site.
具体的,L个站点包括第一站点组;第一站点组内的所有站点各自所分配的传输时间为重叠的相同时间段,且第一站点组内的所有站点各自对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置不为最后一个;第一站点组中的站点在该重叠的相同时间段中舍去传输不完的无线帧中的符号量。Specifically, the L stations include the first station group; the transmission time assigned by all the stations in the first station group is the same overlapping time period, and the corresponding user information fields of all the stations in the first station group are triggered The sequence positions in all non-special user information fields of the frame are not the last; the stations in the first station group discard the symbols in the wireless frames that cannot be completely transmitted in the overlapping same time period.
具体的,L个站点包括第二站点组;第二站点组内的所有站点各自所分配的传输时间为重叠的相同时间段,且第二站点组内的一个站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为最后一个;该重叠的相同时间段占用完第一传输时间中的剩余时长。Specifically, the L stations include the second station group; the transmission time allocated by all the stations in the second station group is the same overlapping time period, and the user information field corresponding to a station in the second station group is in the trigger frame The sequence position in all non-special user information fields of , is the last; the overlapping same time period takes up the remaining time in the first transmission time.
具体的,L个站点中的第六站点在第一传输时间内分配给第六站点的传输时间中舍去传输不完的无线帧中的符号量;第六站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置不为最后一个。Specifically, in the transmission time allocated to the sixth station in the first transmission time, the sixth station among the L stations discards the number of symbols in wireless frames that cannot be completely transmitted; the user information field corresponding to the sixth station is in the trigger frame The sort order position in all non-special user information fields of is not the last.
具体的,在第一传输时间内分配给L个站点中的第七站点的传输时间用完第一传输时间中的剩余时长;第七站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为最后一个。Specifically, the transmission time allocated to the seventh station among the L stations within the first transmission time runs out of the remaining duration in the first transmission time; the user information field corresponding to the seventh station is in all non-special user information of the trigger frame The sort order position in the field is last.
具体的,若L个站点中的第八站点传输的无线帧不足以用完在第一传输时间内分配给第八站点的传输时间,则在第八站点传输的无线帧中添加填充数据;第八站点对应的用户信息字段在触发帧的所有非特殊用户信息字段中的排列顺序位置为任一个。Specifically, if the wireless frame transmitted by the eighth station among the L stations is not enough to use up the transmission time allocated to the eighth station within the first transmission time, then add padding data to the wireless frame transmitted by the eighth station; The sequence position of the user information fields corresponding to the eight stations in all non-special user information fields of the trigger frame is any one.
具体的,触发帧还包括用于指示L个站点中的站点应答清除发送CTS帧的信息。Specifically, the trigger frame further includes information for instructing a station in the L stations to respond to a clear-to-send CTS frame.
具体的,触发帧为MU-RTS触发帧。Specifically, the trigger frame is a MU-RTS trigger frame.
具体的,无线帧包括单用户物理层协议数据单元SU PPDU或者非触发的物理层协议数据单元non-TB PPDU中的之一。Specifically, the radio frame includes one of a single-user physical layer protocol data unit SU PPDU or a non-triggered physical layer protocol data unit non-TB PPDU.
请参阅图16,图16是本申请实施例提供的一种接入点的结构示意图。其中,接入点1600包括处理器1610、存储器1620、通信接口1630以及用于连接处理器1610、存储器1620、通信接口1630的通信总线。Please refer to FIG. 16 . FIG. 16 is a schematic structural diagram of an access point provided by an embodiment of the present application. Wherein, the access point 1600 includes a
存储器1620包括但不限于是随机存储记忆体(random access memory,RAM)、只读存储器(read-only memory,ROM)、可擦除可编程只读存储器(erasable programmableread-only memory,EPROM)或便携式只读存储器(compact disc read-only memory,CD-ROM),该存储器1620用于存储接入点1600所执行的程序代码和所传输的数据。The memory 1620 includes but is not limited to random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), erasable programmable read-only memory (erasable programmable read-only memory, EPROM) or portable A read-only memory (compact disc read-only memory, CD-ROM), the memory 1620 is used to store program codes executed by the access point 1600 and transmitted data.
通信接口1630用于接收和发送数据。The
处理器1610可以是一个或多个CPU。在处理器1610是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。
接入点1600中的处理器1610用于读取存储器1620中存储的一个或多个程序621,执行以下操作:发送触发帧,触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,触发帧包括一个公共信息字段和至少一个用户信息字段,L的取值为大于或等于1的整数;其中,公共信息字段携带第一信息,第一信息用于指示第一传输时间;用户信息字段携带第二信息,第二信息用于配置在第一传输时间内分配给用户信息字段对应的L个站点中的站点的传输时间。The
需要说明的是,各个操作的具体实现可以采用上述图5所示的方法实施例的相应描述,接入点1600可以用于执行本申请上述方法实施例的接入点侧的方法,在此不再具体赘述。It should be noted that the specific implementation of each operation can use the corresponding description of the method embodiment shown in FIG. 5 above, and the access point 1600 can be used to execute the method on the access point side of the above method embodiment of the present application, which is not described here. More details.
请参阅图17,图17是本申请实施例提供的一种站点的结构示意图。其中,站点1700包括处理器1710、存储器1720、通信接口1730以及用于连接处理器1710、存储器1720、通信接口1730的通信总线。Please refer to FIG. 17 . FIG. 17 is a schematic structural diagram of a site provided by an embodiment of the present application. Wherein, the station 1700 includes a
存储器1720包括但不限于是随机存储记忆体(random access memory,RAM)、只读存储器(read-only memory,ROM)、可擦除可编程只读存储器(erasable programmableread-only memory,EPROM)或便携式只读存储器(compact disc read-only memory,CD-ROM),该存储器1720用于存储站点1700所执行的程序代码和所传输的数据。Memory 1720 includes but is not limited to random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), erasable programmable read-only memory (erasable programmable read-only memory, EPROM) or portable Read-only memory (compact disc read-only memory, CD-ROM), the memory 1720 is used to store program codes executed by the station 1700 and transmitted data.
通信接口1730用于接收和发送数据。The
处理器1710可以是一个或多个CPU,在处理器1710是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。The
站点1700中的处理器1710用于读取存储器1720中存储的一个或多个程序1721,执行以下操作:获取触发帧,触发帧用于向L个站点分配传输机会TXOP内传输时间以传输无线帧,触发帧包括一个公共信息字段和至少一个用户信息字段,L为大于或等于1的整数;其中,公共信息字段携带第一信息,第一信息用于指示第一传输时间;用户信息字段携带第二信息,第二信息用于配置在第一传输时间内分配给用户信息字段对应的L个站点中的站点的传输时间。The
需要说明的是,各个操作的具体实现可以采用上述图5所示的方法实施例的相应描述,站点1700可以用于执行本申请上述方法实施例的站点侧的方法,在此不再具体赘述。It should be noted that the specific implementation of each operation can use the corresponding description of the method embodiment shown in FIG. 5 above, and the station 1700 can be used to execute the method on the station side of the above method embodiment of the present application, which will not be described in detail here.
本申请实施例还提供了一种计算机可读存储介质,其中,所述计算机可读存储介质存储用于电子数据交换的计算机程序,其中,所述计算机程序使得计算机执行如上述方法实施例中站点或接入点所描述的部分或全部步骤。An embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables the computer to execute the website or some or all of the steps described by the access point.
本申请实施例还提供了一种计算机程序产品,其中,所述计算机程序产品包括计算机程序,所述计算机程序可操作来使计算机执行如上述方法实施例中站点或接入点所描述的部分或全部步骤。该计算机程序产品可以为一个软件安装包。An embodiment of the present application also provides a computer program product, wherein the computer program product includes a computer program, and the computer program is operable to cause the computer to perform the part or All steps. The computer program product may be a software installation package.
需要说明的是,对于上述的各个实施例,为了简单描述,将其都表述为一系列的动作组合。本领域技术人员应该知悉,本申请不受所描述的动作顺序的限制,因为本申请实施例中的某些步骤可以采用其他顺序或者同时进行。另外,本领域技术人员也应该知悉,说明书中所描述的实施例均属于优选实施例,所涉及的动作、步骤、模块或单元等并不一定是本申请实施例所必须的。It should be noted that, for the above-mentioned embodiments, for the sake of simple description, they are expressed as a series of action combinations. Those skilled in the art should know that the present application is not limited by the sequence of actions described, because some steps in the embodiments of the present application may be performed in other orders or simultaneously. In addition, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions, steps, modules or units involved are not necessarily required by the embodiments of the present application.
在上述实施例中,本申请实施例对各个实施例的描述都各有侧重,某个实施例中没有详述的部分,可以参见其他实施例的相关描述。In the above-mentioned embodiments, the embodiments of the present application have different emphases in the description of each embodiment, and for the parts not described in detail in a certain embodiment, refer to the relevant descriptions of other embodiments.
本领域技术人员应该知悉,本申请实施例所描述的方法、步骤或者相关模块/单元的功能可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式来实现,也可以是由处理器执行计算机程序指令的方式来实现。其中,该计算机程序产品包括至少一个计算机程序指令,计算机程序指令可以由相应的软件模块组成,软件模块可以被存放于RAM、闪存、ROM、EPROM、EEPROM、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。该计算机程序指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输。例如,该计算机程序指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。该计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。该可用介质可以是磁性介质(例如,软盘、硬盘、磁带)、光介质、或者半导体介质(如SSD)等。Those skilled in the art should know that the methods, steps or functions of related modules/units described in the embodiments of the present application may be realized in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it may be implemented in whole or in part in the form of a computer program product, or may be implemented in a manner in which a processor executes computer program instructions. Wherein, the computer program product includes at least one computer program instruction, and the computer program instruction can be composed of corresponding software modules, and the software modules can be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, mobile hard disk, CD-ROM (CD-ROM) or any other form of storage medium known in the art. The computer program instructions may be stored in, or transmitted from, one computer-readable storage medium to another computer-readable storage medium. For example, the computer program instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium, or a semiconductor medium (such as an SSD).
上述实施例中描述的各个装置或产品包含的各个模块/单元,其可以是软件模块/单元,可以是硬件模块/单元,也可以一部分是软件模块/单元,而另一部分是硬件模块/单元。例如,对于应用于或集成于芯片的各个装置或产品,其包含的各个模块/单元可以都采用电路等硬件的方式实现;或者,其包含的一部分模块/单元可以采用软件程序的方式实现,该软件程序运行于芯片内部集成的处理器,而另一部分(如果有)的部分模块/单元可以采用电路等硬件方式实现。对于应用于或集成于芯片模组的各个装置或产品,或者应用于或集成于终端的各个装置或产品,同理可知。Each module/unit contained in each device or product described in the above embodiments may be a software module/unit, may be a hardware module/unit, or may be a part of a software module/unit while the other part is a hardware module/unit. For example, for each device or product applied to or integrated in a chip, each module/unit included in it may be implemented by hardware such as a circuit; or, a part of the modules/units included in it may be implemented by a software program. The software program runs on the processor integrated in the chip, and some modules/units of the other part (if any) can be realized by hardware such as circuits. The same can be understood for each device or product applied to or integrated in a chip module, or each device or product applied to or integrated in a terminal.
以上所述的具体实施方式,对本申请实施例的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本申请实施例的具体实施方式而已,并不用于限定本申请实施例的保护范围。凡在本申请实施例的技术方案的基础之上,所做的任何修改、等同替换、改进等,均应包括在本申请实施例的保护范围之内。The specific implementation manners described above further describe the purpose, technical solutions and beneficial effects of the embodiments of the present application in detail. The scope of protection of the embodiments of the present application is limited. All modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.
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WO2024259711A1 (en) * | 2023-06-21 | 2024-12-26 | 北京小米移动软件有限公司 | Communication method, electronic device and storage medium |
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