WO2015131381A1

WO2015131381A1 - Direct link communication method, access point and station

Info

Publication number: WO2015131381A1
Application number: PCT/CN2014/073013
Authority: WO
Inventors: 林英沛; 张佳胤
Original assignee: 华为技术有限公司
Priority date: 2014-03-06
Filing date: 2014-03-06
Publication date: 2015-09-11
Also published as: CN105766042A; CN105766042B

Abstract

Disclosed are a direct link communication method, access point (AP) and station (STA), the method comprising: an AP receives a transmission resource request for direct link communication between a first STA and a second STA sent by the first STA; the AP determines the transmission resources of the direct link communication according to the transmission resource request; the AP determines the transmission power of the direct link communication and the transmission power of a third STA, the direct link transmission power and the third STA transmission causing transmission interference between the direct link communication and the transmission of the third STA to be lower than a preset value; the AP sends to the first and second STAs the first scheduling information indicative of the transmission resources and transmission power of the direct link communication, and sends to the third STA the second scheduling information indicative of the transmission power and transmission resources of the third STA. An embodiment of the present invention can improve network efficiency.

Description

直接链路通信的方法、接入点和站点技术领域 Method, access point and site for direct link communication

本发明涉及通信领域，并且更具体地，涉及直接链路通信的方法、接入点 ( Access Point, AP )和占点 ( station, STA )。背景技术 The present invention relates to the field of communications and, more particularly, to a method of direct link communication, an Access Point (AP), and a station (STA). Background technique

由于网络技术和移动设备的飞速发展，基于电气和电子工程协会 ( Institute of Electrical and Electronics Engineers , IEEE ) 802.11标准的无线局域网（ Wireless Local Area Network, WLAN )技术得到了长足的发展和广泛的应用。如今，全世界有超过 17%的人口利用无线保真（Wireless Fidelity, WiFi )进行网络连接，每年有超过十亿的 WiFi设备交付市场。家庭、热点、企业以及运营商部署的 WiFi网络随处可见 WiFi的踪迹。便携电脑、平板电脑、智能手机、数码相机、媒体播放器等带有 WLAN功能的智能终端的普及率越来越高。这些智能终端给人们的工作和生活带来便利的同时，也给 WLAN技术的发展带来了很大的挑战。同时， WiFi高端应用的数量也在不断攀升。通过典型 WiFi网络进行传输的信息总量正在***式地增长。然而， WLAN业务的随处可见，带来的是 WLAN频段的日益拥塞。 WLAN网络使用的是免费非授权频段。由于这种开放频谱的特性，使得免费非授权频谱使用日益紧张。这对 WLAN网络的频谱使用效率提出了很高的要求。发明内容 Due to the rapid development of network technology and mobile devices, the Wireless Local Area Network (WLAN) technology based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard has been greatly developed and widely used. Today, more than 17% of the world's population uses Wireless Fidelity (WiFi) for network connectivity, with more than one billion WiFi devices delivered to the market each year. WiFi traces can be found everywhere in homes, hotspots, businesses, and WiFi networks deployed by carriers. The popularity of WLAN-enabled smart terminals such as laptops, tablets, smartphones, digital cameras, and media players is increasing. These smart terminals bring convenience to people's work and life, but also bring great challenges to the development of WLAN technology. At the same time, the number of high-end WiFi applications is also rising. The amount of information transmitted over a typical WiFi network is exploding. However, WLAN services can be seen everywhere, resulting in increased congestion in the WLAN band. The WLAN network uses a free unlicensed band. Due to the nature of this open spectrum, the use of free unlicensed spectrum is becoming increasingly tight. This places high demands on the spectrum efficiency of WLAN networks. Summary of the invention

本发明实施例提供了一种直接链路通信的方法、接入点和站点，能够提升网络效率。 Embodiments of the present invention provide a method, an access point, and a station for direct link communication, which can improve network efficiency.

第一方面，提供了一种直接链路通信的方法，包括： In a first aspect, a method for direct link communication is provided, including:

AP接收第一 STA发送的该第一 STA和第二 STA之间的直接链路通信的传输资源请求； Receiving, by the AP, a transmission resource request for direct link communication between the first STA and the second STA sent by the first STA;

该 AP根据该传输资源请求，确定该直接链路通信的传输资源；该 AP确定该直接链路通信的发送功率以及第三 STA的发送功率，其中，该第三 STA 的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； The AP determines the transmission resource of the direct link communication according to the transmission resource request; the AP determines the transmission power of the direct link communication and the transmission power of the third STA, where the transmission resource of the third STA and the direct chain The transmission resources of the road communication overlap, the transmission power of the direct link communication and the transmission power of the third STA enable the direct link communication and the third STA The interference between the transmissions is lower than a predetermined value;

该 AP向该第一 STA和该第二 STA发送第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，并向该第三 STA发送第二调度信息，该第二调度信息指示该第三 STA的发送功率和该第三 STA的传输资源，以使该第一 STA和该第二 STA根据该第一调度信息进行直接链路通信，该第三 STA根据该第二调度信息发送数据。 The AP sends first scheduling information to the first STA and the second STA, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, and sends the first to the third STA. a second scheduling information, where the second scheduling information indicates the transmission power of the third STA and the transmission resource of the third STA, so that the first STA and the second STA perform direct link communication according to the first scheduling information, where The third STA transmits data according to the second scheduling information.

结合第一方面，在第一种可能的实现方式中，在该 AP确定该直接链路通信的发送功率以及第三 STA的发送功率之前，该方法还包括： With the first aspect, in a first possible implementation, before the AP determines the transmit power of the direct link communication and the transmit power of the third STA, the method further includes:

该 AP确定该 AP的本地噪声功率； The AP determines a local noise power of the AP;

该 AP接收该第一 STA、该第二 STA和该第三 STA中的每个 STA发送的该每个 STA的位置信息； Receiving, by the AP, location information of each STA sent by each STA of the first STA, the second STA, and the third STA;

该 AP根据该每个 STA在关联过程中发送的关联帧，确定该 AP与该每个 STA之间的链路信息； Determining link information between the AP and each STA according to the associated frame sent by each STA in the association process;

该 AP接收该第一 STA发送的该第一 STA的本地噪声功率以及该第一 STA和该第二 STA之间的链路信息，接收该第二 STA发送的该第二 STA的本地噪声功率； The AP receives the local noise power of the first STA and the link information between the first STA and the second STA, and receives the local noise power of the second STA sent by the second STA.

该 AP确定该直接链路通信的发送功率以及第三 STA的发送功率，包括：该 AP根据该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率以及第三 STA的发送功率。 Determining, by the AP, the transmit power of the direct link communication and the transmit power of the third STA, including: the AP according to link information between the first STA and the second STA, and between the AP and each STA Determining the transmission power of the direct link communication and the third STA, the link information, the location information of each STA, the local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA Transmit power.

结合第一方面的第一种可能的实现方式，在第二种可能的实现方式中，该 AP确定该直接链路通信的发送功率以及第三 STA的发送功率，包括：该 AP根据该第一 STA和该第二 STA之间的链路信息、该第一 STA的本地噪声功率以及该第二 STA 的本地噪声功率，确定该直接链路通信的发送功率； With reference to the first possible implementation of the first aspect, in a second possible implementation, the AP determines the transmit power of the direct link communication and the transmit power of the third STA, including: the AP according to the first Determining, by the link information between the STA and the second STA, the local noise power of the first STA, and the local noise power of the second STA, determining a transmit power of the direct link communication;

该 AP根据该直接链路通信的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA 的本地噪声功率，确定该第三 STA的发送功率。 The AP is configured according to the transmit power of the direct link communication, the link information between the first STA and the second STA, the link information between the AP and the STA, the location information of each STA, The local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the third STA.

结合第一方面的第一种可能的实现方式，在第三种可能的实现方式中，该 AP确定该直接链路通信的发送功率以及第三 STA的发送功率，包括：该 AP根据该 AP与该第三 STA之间的链路信息、该 AP的本地噪声功率，确定该第三 STA的发送功率； In conjunction with the first possible implementation of the first aspect, in a third possible implementation, Determining the transmit power of the direct link communication and the transmit power of the third STA, the AP includes: determining, by the AP, the third STA according to link information between the AP and the third STA, and local noise power of the AP Transmit power

该 AP根据该第三 STA的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率。 The AP is configured according to the sending power of the third STA, the link information between the first STA and the second STA, the link information between the AP and the STA, the location information of each STA, The local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication.

结合第一方面的第一至三种可能的实现方式中的任一种可能的实现方式，在第四种可能的实现方式中，该 AP根据该每个 STA在关联过程中发送的关联帧，确定该 AP与该每个 STA之间的链路信息，包括： With reference to any one of the first to the three possible implementations of the first aspect, in a fourth possible implementation, the AP is configured according to the associated frame sent by the STA in the association process. Determining link information between the AP and each STA, including:

该 AP根据该关联帧，确定该关联帧的接收信号功率； Determining, by the AP, the received signal power of the associated frame according to the associated frame;

该 AP根据该关联帧的接收信号功率和该 AP的本地噪声功率，确定该关联帧的接收信号强度； The AP determines the received signal strength of the associated frame according to the received signal power of the associated frame and the local noise power of the AP;

该 AP根据该关联帧的额定发送功率和该关联帧的接收信号强度，确定该 AP与该每个 STA之间的链路信息。 The AP determines link information between the AP and each STA according to the rated transmit power of the associated frame and the received signal strength of the associated frame.

第二方面，提供了一种直接链路通信的方法，包括： In a second aspect, a method for direct link communication is provided, including:

第一 STA向 AP发送该第一 STA和第二 STA之间的直接链路通信的传输资源请求； Transmitting, by the first STA, a transmission resource request of the direct link communication between the first STA and the second STA to the AP;

该第一 STA接收该 AP发送的第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，其中，该直接链路通信的发送功率和第三 STA的发送功率由该 AP确定，该第三 STA的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； The first STA receives the first scheduling information sent by the AP, where the first scheduling information indicates the transmission resource of the direct link communication and the transmission power of the direct link communication, where the transmission power of the direct link communication and the first The transmission power of the three STAs is determined by the AP, the transmission resource of the third STA overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the transmission power of the third STA enable the direct link communication. The interference with the transmission of the third STA is lower than a predetermined value;

该第一 STA在该直接链路通信的传输资源上使用该直接链路通信的发送功率与该第二 STA进行直接链路通信。 The first STA performs direct link communication with the second STA using the transmission power of the direct link communication on the transmission resource of the direct link communication.

结合第二方面，在第一种可能的实现方式中，该直接链路通信的发送功率和该第三 STA的发送功率由该 AP根据该第一 STA和该第二 STA之间的链路信息、该 AP与该第一 STA、该第二 STA和该第三 STA中的每个 STA 之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 With reference to the second aspect, in a first possible implementation, the transmit power of the direct link communication and the transmit power of the third STA are determined by the AP according to link information between the first STA and the second STA. Link information between the AP and each of the first STA, the second STA, and the third STA, location information of each STA, local noise power of the AP, the first

STA的本地噪声功率以及该第二 STA的本地噪声功率确定；在该第一 STA向 AP发送该第一 STA和第二 STA之间的直接链路通信的传输资源请求之前，该方法还包括： The local noise power of the STA and the local noise power of the second STA are determined; Before the first STA sends the transmission resource request of the direct link communication between the first STA and the second STA to the AP, the method further includes:

该第一 STA向该 AP发送该第一 STA的位置信息； Sending, by the first STA, location information of the first STA to the AP;

该第一 STA在关联过程中向该 AP发送关联帧，以使该 AP确定该 AP 与该第一 STA之间的链路信息； The first STA sends an association frame to the AP in the association process, so that the AP determines link information between the AP and the first STA.

该第一 STA确定该第一 STA的本地噪声功率； Determining, by the first STA, a local noise power of the first STA;

该第一 STA以额定功率向该第二 STA发送发现请求帧，接收该第二 STA 以额定功率发送的发现响应帧； The first STA sends a discovery request frame to the second STA at a rated power, and receives a discovery response frame sent by the second STA at a rated power;

该第一 STA根据该发现响应帧，确定该第一 STA和该第二 STA之间的链路信息； Determining, by the first STA, link information between the first STA and the second STA according to the discovery response frame;

该第一 STA向该 AP发送该第一 STA的本地噪声功率以及该第一 STA 和该第二 STA之间的链路信息。 The first STA sends the local noise power of the first STA and the link information between the first STA and the second STA to the AP.

结合第二方面的第一种可能的实现方式，在第二种可能的实现方式中，该第一 STA根据该发现响应帧，确定该第一 STA和该第二 STA之间的链路信息，包括： With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the first STA determines, according to the discovery response frame, link information between the first STA and the second STA, Includes:

该第一 STA根据该发现响应帧，确定该发现响应帧的接收信号功率；该第一 STA根据该发现响应帧的接收信号功率和该第一 STA的本地噪声功率，确定该发现响应帧的接收信号强度； The first STA determines the received signal power of the discovery response frame according to the discovery response frame; the first STA determines the reception of the discovery response frame according to the received signal power of the discovery response frame and the local noise power of the first STA. Signal strength

该第一 STA根据该发现响应帧的额定发送功率和该发现响应帧的接收信号强度，确定该第一 STA和该第二 STA之间的链路信息。 The first STA determines link information between the first STA and the second STA according to the rated transmit power of the discovery response frame and the received signal strength of the discovery response frame.

第三方面，提供了一种接入点 AP, 包括： In a third aspect, an access point AP is provided, including:

接收模块，用于接收第一 STA发送的该第一 STA和第二 STA之间的直接链路通信的传输资源请求； a receiving module, configured to receive a transmission resource request for direct link communication between the first STA and the second STA sent by the first STA;

确定模块，用于根据该传输资源请求确定该直接链路通信的传输资源，并且确定该直接链路通信的发送功率以及第三 STA 的发送功率，其中，该第三 STA 的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； a determining module, configured to determine, according to the transmission resource request, a transmission resource of the direct link communication, and determine a transmission power of the direct link communication and a transmission power of the third STA, where the transmission resource of the third STA and the direct The transmission resources of the link communication overlap, the transmission power of the direct link communication and the transmission power of the third STA make the interference between the direct link communication and the transmission of the third STA mutually lower than a predetermined value;

发送模块，用于向该第一 STA和该第二 STA发送第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，并向该第三 STA发送第二调度信息，该第二调度信息指示该第三 STA的发送功率和该第三 STA的传输资源，以使该第一 STA和该第二 STA根据该第一调度信息进行直接链路通信，该第三 STA根据该第二调度信息发送数据。 a sending module, configured to send first scheduling information to the first STA and the second STA, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, and the third scheduling information is sent to the third The STA sends the second scheduling information, where the second scheduling information indicates the sending of the third STA. Sending power and transmission resources of the third STA, so that the first STA and the second STA perform direct link communication according to the first scheduling information, and the third STA sends data according to the second scheduling information.

结合第三方面，在第一种可能的实现方式中，该接收模块还用于接收该第一 STA、该第二 STA和该第三 STA中的每个 STA发送的该每个 STA的位置信息，接收该第一 STA发送的该第一 STA的本地噪声功率以及该第一 STA 和该第二 STA之间的链路信息，接收该第二 STA发送的该第二 STA的本地噪声功率； With reference to the third aspect, in a first possible implementation manner, the receiving module is further configured to receive location information of each STA sent by each of the first STA, the second STA, and the third STA Receiving, by the first STA, the local noise power of the first STA and the link information between the first STA and the second STA, and receiving the local noise power of the second STA sent by the second STA;

该确定模块还用于确定该 AP的本地噪声功率，根据该每个 STA在关联过程中发送的关联帧，确定该 AP与该每个 STA之间的链路信息； The determining module is further configured to determine a local noise power of the AP, and determine link information between the AP and each STA according to the associated frame sent by each STA in the association process;

该确定模块具体用于根据该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率以及第三 STA的发送功率。 The determining module is specifically configured to: according to link information between the first STA and the second STA, link information between the AP and each STA, location information of each STA, local noise of the AP The power, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication and the transmit power of the third STA.

结合第三方面的第一种可能的实现方式，在第二种可能的实现方式中，该确定模块具体用于根据该第一 STA和该第二 STA之间的链路信息、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率，根据该直接链路通信的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA 的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该第三 STA的发送功率。 With reference to the first possible implementation manner of the third aspect, in a second possible implementation, the determining module is specifically configured to: according to link information between the first STA and the second STA, the first STA Determining the transmit power of the direct link communication according to the local noise power and the local noise power of the second STA, according to the transmit power of the direct link communication, the link information between the first STA and the second STA, Determining the link information between the AP and the STA, location information of each STA, local noise power of the AP, local noise power of the first STA, and local noise power of the second STA The transmit power of the three STAs.

结合第三方面的第一种可能的实现方式，在第三种可能的实现方式中，该确定模块具体用于根据该 AP与该第三 STA之间的链路信息、该 AP的本地噪声功率，确定该第三 STA的发送功率，根据该第三 STA的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA 的本地噪声功率，确定该直接链路通信的发送功率。 With reference to the first possible implementation manner of the third aspect, in a third possible implementation, the determining module is specifically configured to: according to link information between the AP and the third STA, local noise power of the AP Determining the transmit power of the third STA, according to the transmit power of the third STA, link information between the first STA and the second STA, link information between the AP and the STA, The location information of each STA, the local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication.

结合第三方面的第一至三种可能的实现方式中的任一种可能的实现方式，在第四种可能的实现方式中，该确定模块具体用于根据该关联帧确定该关联帧的接收信号功率，根据该关联帧的接收信号功率和该 AP的本地噪声功率确定该关联帧的接收信号强度，根据该关联帧的额定发送功率和该关联帧的接收信号强度确定该 AP与该每个 STA之间的链路信息。 With reference to the possible implementation of any one of the first to the three possible implementations of the third aspect, in a fourth possible implementation, the determining module is specifically configured to determine, according to the associated frame, the receiving of the associated frame a signal power, determining a received signal strength of the associated frame according to a received signal power of the associated frame and a local noise power of the AP, according to the rated transmit power of the associated frame and the association The received signal strength of the frame determines the link information between the AP and each of the STAs.

第四方面，提供了一种站点 STA, 包括： In a fourth aspect, a site STA is provided, including:

发送模块，用于向 AP发送该 STA和第二 STA之间的直接链路通信的传输资源请求； a sending module, configured to send, to the AP, a transmission resource request for direct link communication between the STA and the second STA;

接收模块，用于接收该 AP发送的第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，其中，该直接链路通信的发送功率和第三 STA的发送功率由该 AP确定，该第三 STA的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； a receiving module, configured to receive first scheduling information sent by the AP, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, where the transmission power of the direct link communication is The transmission power of the third STA is determined by the AP, the transmission resource of the third STA overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the transmission power of the third STA make the direct link The interference between the communication and the transmission of the third STA is lower than a predetermined value;

操作模块，用于在该直接链路通信的传输资源上使用该直接链路通信的发送功率与该第二 STA进行直接链路通信。 And an operation module, configured to perform direct link communication with the second STA by using the transmit power of the direct link communication on the transmission resource of the direct link communication.

结合第四方面，在第一种可能的实现方式中，该直接链路通信的发送功率和该第三 STA的发送功率由该 AP根据该 STA和该第二 STA之间的链路信息、该 AP与该 STA、该第二 STA和该第三 STA中的每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该 STA的本地噪声功率以及该第二 STA的本地噪声功率确定； With reference to the fourth aspect, in a first possible implementation, the transmit power of the direct link communication and the transmit power of the third STA are determined by the AP according to link information between the STA and the second STA, Link information between the AP and the STA, each of the second STA and the third STA, location information of each STA, local noise power of the AP, local noise power of the STA, and the The local noise power of the two STAs is determined;

该发送模块还用于向该 AP发送该 STA的位置信息，在关联过程中向该 AP发送关联帧以使该 AP确定该 AP与该 STA之间的链路信息，以额定功率向该第二 STA发送发现请求帧； The sending module is further configured to send the location information of the STA to the AP, and send an associated frame to the AP in the association process, so that the AP determines link information between the AP and the STA, and uses the rated power to the second. The STA sends a discovery request frame;

该接收模块还用于接收该第二 STA以额定功率发送的发现响应帧；该 STA还包括： The receiving module is further configured to receive a discovery response frame that is sent by the second STA at a rated power; the STA further includes:

确定模块，用于确定该 STA 的本地噪声功率，根据该发现响应帧确定该 STA和该第二 STA之间的链路信息； a determining module, configured to determine a local noise power of the STA, and determining link information between the STA and the second STA according to the discovery response frame;

该发送模块还用于向该 AP发送该 STA的本地噪声功率以及该 STA和该第二 STA之间的链路信息。 The sending module is further configured to send, to the AP, local noise power of the STA and link information between the STA and the second STA.

结合第四方面的第一种可能的实现方式，在第二种可能的实现方式中，该确定模块具体用于根据该发现响应帧确定该发现响应帧的接收信号功率，根据该发现响应帧的接收信号功率和该 STA 的本地噪声功率确定该发现响应帧的接收信号强度，根据该发现响应帧的额定发送功率和该发现响应帧的接收信号强度确定该 STA和该第二 STA之间的链路信息。基于上述技术方案，本发明实施例通过确定第一 STA和第二 STA的直接链路通信的发送功率和第三 STA 的发送功率，使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值，可以使第一 STA和第二 STA的直接链路通信与第三 STA的传输同时进行，从而能够提升网络效率。附图说明 With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation, the determining module is specifically configured to determine, according to the discovery response frame, a received signal power of the discovery response frame, according to the discovery response frame. The received signal power and the local noise power of the STA determine the received signal strength of the discovery response frame, and the chain between the STA and the second STA is determined according to the rated transmit power of the discovery response frame and the received signal strength of the discovery response frame. Road information. Based on the foregoing technical solution, the embodiment of the present invention determines that the direct link communication and the third STA transmit each other by determining the transmit power of the direct link communication of the first STA and the second STA and the transmit power of the third STA. The interference is lower than the predetermined value, and the direct link communication between the first STA and the second STA can be performed simultaneously with the transmission of the third STA, thereby improving network efficiency. DRAWINGS

为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作筒单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

图 1是本发明实施例的一个应用场景的示意图。 FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention.

图 2是根据本发明一个实施例的直接链路通信的方法的示意性流程图。图 3是根据本发明另一实施例的直接链路通信的方法的示意性流程图。图 4是根据本发明实施例的 AP的示意性框图。 2 is a schematic flow chart of a method of direct link communication in accordance with one embodiment of the present invention. FIG. 3 is a schematic flowchart of a method of direct link communication according to another embodiment of the present invention. 4 is a schematic block diagram of an AP according to an embodiment of the present invention.

图 5是根据本发明实施例的 STA的示意性框图。 FIG. 5 is a schematic block diagram of a STA according to an embodiment of the present invention.

图 6是根据本发明实施例的 AP的结构示意图。 FIG. 6 is a schematic structural diagram of an AP according to an embodiment of the present invention.

图 7是根据本发明实施例的 STA的结构示意图。具体实施方式 FIG. 7 is a schematic structural diagram of a STA according to an embodiment of the present invention. detailed description

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例，都应属于本发明保护的范围。 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

图 1是本发明实施例的一个应用场景的示意图。图 1中， STA 101、 STA 102和 STA 103都关联于 AP 100。 AP 100建立的基本服务集（ Basic Service Set, BSS )以调度的信道接入机制工作。 AP 100负责传输资源的调度和分配。在整个 BSS中，正常链路（ AP至 STA或者 STA至 AP )和直接链路 ( STA 至 STA )共存。 STA 101和 STA 102之间属于直接链路通信， STA 103和 AP 100之间属于正常链路通信。在 STA 101和 STA 102之间的直接链路通信与 STA 103和 AP 100之间的正常链路通信的传输资源重叠的情况下，两路通信可能会相互干扰。应理解，在本发明实施例中，传输资源重叠表示传输资源完全相同或者部分相同。 FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present invention. In FIG. 1, STA 101, STA 102, and STA 103 are all associated with AP 100. The Basic Service Set (BSS) established by the AP 100 operates with a scheduled channel access mechanism. The AP 100 is responsible for scheduling and allocating transmission resources. In the entire BSS, a normal link (AP to STA or STA to AP) and a direct link (STA to STA) coexist. The STA 101 and the STA 102 belong to direct link communication, and the STA 103 and the AP 100 belong to normal link communication. In the case where the direct link communication between the STA 101 and the STA 102 overlaps with the transmission resources of the normal link communication between the STA 103 and the AP 100, the two-way communication may interfere with each other. It should be understood that, in the embodiment of the present invention, the overlapping of transmission resources indicates that the transmission resources are identical or partially identical.

图 2示出了根据本发明实施例的直接链路通信的方法 200的示意性流程图。如图 2所示，该方法 200包括： 2 shows a schematic flow diagram of a method 200 of direct link communication in accordance with an embodiment of the present invention. As shown in FIG. 2, the method 200 includes:

S210, AP接收第一 STA发送的该第一 STA和第二 STA之间的直接链路通信的传输资源请求； S210. The AP receives a transmission resource request for direct link communication between the first STA and the second STA that is sent by the first STA.

S220, 该 AP根据该传输资源请求，确定该直接链路通信的传输资源； S230 ,该 AP确定该直接链路通信的发送功率以及第三 STA的发送功率，其中，该第三 STA 的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA 的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； S220, the AP determines, according to the transmission resource request, a transmission resource of the direct link communication; S230, the AP determines a transmission power of the direct link communication and a transmission power of the third STA, where the transmission resource of the third STA Intersecting with the transmission resource of the direct link communication, the transmission power of the direct link communication and the transmission power of the third STA make the interference between the direct link communication and the transmission of the third STA mutually lower than a predetermined value;

S240, 该 AP向该第一 STA和该第二 STA发送第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，并向该第三 STA发送第二调度信息，该第二调度信息指示该第三 STA的发送功率和该第三 STA的传输资源，以使该第一 STA和该第二 STA根据该第一调度信息进行直接链路通信，该第三 STA根据该第二调度信息发送数据。 S240, the AP sends first scheduling information to the first STA and the second STA, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, and the third STA is sent to the third STA. Transmitting the second scheduling information, where the second scheduling information indicates the sending power of the third STA and the transmission resource of the third STA, so that the first STA and the second STA perform direct link communication according to the first scheduling information. The third STA sends data according to the second scheduling information.

在本发明实施例中，该方法 200的执行主体 AP可以是图 1中的 AP 100, 第一 STA、第二 STA和第三 STA可以分别是图 1中的 STA 101、 STA 102 和 STA 103。应理解，第三 STA的传输可以是第三 STA至 AP的传输，也可以是第三 STA与其他 STA (比如第四 STA ) 的直接链路通信，本发明对此并不限定。 In the embodiment of the present invention, the executor AP of the method 200 may be the AP 100 in FIG. 1, and the first STA, the second STA, and the third STA may be the STA 101, the STA 102, and the STA 103 in FIG. 1, respectively. It should be understood that the transmission of the third STA may be a third STA to AP transmission, or may be a direct link communication between the third STA and other STAs (such as a fourth STA), which is not limited by the present invention.

第一 STA和第二 STA要进行直接链路通信时，第一 STA (或第二 STA ) 向 AP发送该直接链路通信的传输资源请求，向 AP申请传输资源。 AP接收到该传输资源请求后，为该直接链路通信分配传输资源。为了同时调度第三 STA, AP—并确定该直接链路通信的发送功率以及第三 STA的发送功率，以使该直接链路通信和该第三 STA 的传输相互之间的干扰低于预定值，即该直接链路通信对该第三 STA的传输的干扰低于预定值并且该第三 STA的传输对该直接链路通信的干扰低于预定值。然后，该 AP向该第一 STA和该第二 STA发送第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，向该第三 STA发送第二调度信息，该第二调度信息指示该第三 STA的发送功率和该第三 STA的传输资源。该第一 STA和该第二 STA根据该第一调度信息进行直接链路通信，即该第一 STA 和该第二 STA在该第一调度信息指示的直接链路通信的传输资源上使用该第一调度信息指示的直接链路通信的发送功率进行通信。第三 STA根据该第二调度信息发送数据，即该第三 STA在该第二调度信息指示的第三 STA 的传输资源上使用该第二调度信息指示的第三 STA 的发送功率发送数据。由于 AP确定的该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA 的传输相互之间的干扰低于预定值，因此，第一 STA和第二 STA的直接链路通信能够与第三 STA的传输同时进行，从而提升了网络效率。 When the first STA and the second STA are to perform direct link communication, the first STA (or the second STA) sends a transmission resource request of the direct link communication to the AP, and requests the AP to transmit the resource. After receiving the transmission resource request, the AP allocates transmission resources for the direct link communication. In order to simultaneously schedule the third STA, the AP—determines the transmission power of the direct link communication and the transmission power of the third STA, so that the interference between the direct link communication and the transmission of the third STA is lower than a predetermined value. That is, the interference of the direct link communication to the transmission of the third STA is lower than a predetermined value and the interference of the transmission of the third STA to the direct link communication is lower than a predetermined value. Then, the AP sends first scheduling information to the first STA and the second STA, where the first scheduling information indicates the transmission resource of the direct link communication and the transmission power of the direct link communication, and sends the transmission power to the third STA. The second scheduling information indicates the transmission power of the third STA and the transmission resource of the third STA. The first The first STA and the second STA perform direct link communication according to the first scheduling information, that is, the first STA and the second STA use the first scheduling on the transmission resource of the direct link communication indicated by the first scheduling information. The transmission power of the direct link communication indicated by the information is communicated. The third STA sends data according to the second scheduling information, that is, the third STA uses the transmission power of the third STA indicated by the second scheduling information to transmit data on the transmission resource of the third STA indicated by the second scheduling information. Since the transmission power of the direct link communication determined by the AP and the transmission power of the third STA make the interference between the direct link communication and the transmission of the third STA mutually lower than a predetermined value, the first STA and the first The direct link communication of the two STAs can be performed simultaneously with the transmission of the third STA, thereby improving network efficiency.

因此，本发明实施例的直接链路通信的方法，通过确定第一 STA和第二 STA的直接链路通信的发送功率和第三 STA的发送功率，使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值，可以使第一 STA和第二 STA的直接链路通信与第三 STA的传输同时进行，从而能够提升网络效率。 Therefore, the method for direct link communication according to the embodiment of the present invention, the direct link communication and the third STA are determined by determining the transmit power of the direct link communication of the first STA and the second STA and the transmit power of the third STA. The interference between the transmissions is lower than a predetermined value, and the direct link communication between the first STA and the second STA can be performed simultaneously with the transmission of the third STA, thereby improving network efficiency.

在本发明实施例中，可选地， AP可以根据每个 STA的位置信息确定该直接链路通信的发送功率以及第三 STA的发送功率。 In the embodiment of the present invention, the AP may determine the transmit power of the direct link communication and the transmit power of the third STA according to the location information of each STA.

在本发明实施例中，可选地， AP确定该直接链路通信的发送功率以及第三 STA的发送功率，包括： In the embodiment of the present invention, the AP determines the transmit power of the direct link communication and the transmit power of the third STA, including:

该 AP根据该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率以及第三 STA的发送功率。 The AP is configured according to link information between the first STA and the second STA, link information between the AP and each STA, location information of each STA, local noise power of the AP, and the The local noise power of a STA and the local noise power of the second STA determine the transmit power of the direct link communication and the transmit power of the third STA.

在这种情况下， AP要先获取该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率。 In this case, the AP first acquires link information between the first STA and the second STA, link information between the AP and each STA, location information of each STA, and the AP. The local noise power, the local noise power of the first STA, and the local noise power of the second STA.

因此，可选地，在该 AP确定该直接链路通信的发送功率以及第三 STA 的发送功率之前，该方法 200还包括： Therefore, the method 200 further includes: before the AP determines the transmit power of the direct link communication and the transmit power of the third STA, the method 200 further includes:

该 AP根据该每个 STA在关联过程中发送的关联帧，确定该 AP与该每个 STA之间的链路信息； Determining, by the AP, the AP and each of the associated frames sent by each STA in the association process Link information between STAs;

该 AP接收该第一 STA发送的该第一 STA的本地噪声功率以及该第一 STA和该第二 STA之间的链路信息，接收该第二 STA发送的该第二 STA的本地噪声功率。 The AP receives the local noise power of the first STA and the link information between the first STA and the second STA, and receives the local noise power of the second STA sent by the second STA.

AP首先估计 AP的本地噪声功率。例如， AP可以通过计算平均噪声功率 ( average noise power indicator, ANPI )来估计本地噪声功率。 ANPI的估计方法与现行标准中的计算方法相同。 The AP first estimates the local noise power of the AP. For example, the AP can estimate the local noise power by calculating the average noise power indicator (ANPI). The estimation method of ANPI is the same as that calculated in the current standard.

每个 STA在关联过程中，将自己的位置信息上报给 AP。应理解， STA 也可以在其他时间上报自己的位置信息，本发明对此不限定。 Each STA reports its location information to the AP during the association process. It should be understood that the STA may also report its own location information at other times, which is not limited by the present invention.

每个 STA在关联到 AP时， AP根据每个 STA发送的关联帧估计每个 STA 与 AP之间的链路信息，例如衰落信息。 When each STA is associated with an AP, the AP estimates link information, such as fading information, between each STA and the AP according to the associated frame sent by each STA.

可选地，该 AP根据该每个 STA在关联过程中发送的关联帧，确定该 AP与该每个 STA之间的链路信息，包括： Optionally, the AP determines the link information between the AP and each STA according to the associated frame sent by the STA in the association process, including:

例如， AP 通过 STA 与其交互的关联帧估计接收信号功率（received channel power indicator, RCPI )。 RCPI的估计方法也与现行标准中的计算方法相同。 AP通过将 RCPI减去 ANPI获得接收信号强度。由于关联帧的交互是以额定功率发送的，因此由该额定功率减去接收信号强度可以得到 AP与 STA之间的链路信息。 For example, the AP estimates the received channel power indicator (RCPI) through the associated frame with which the STA interacts. The RCPI estimation method is also the same as the calculation method in the current standard. The AP obtains the received signal strength by subtracting the RCPI from the ANPI. Since the interaction of the associated frame is transmitted at the rated power, the link information between the AP and the STA can be obtained by subtracting the received signal strength from the rated power.

每个 STA估计自己的本地噪声功率，并保存。例如， STA也可以通过计算 ANPI来估计本地噪声功率。 Each STA estimates its own local noise power and saves it. For example, the STA can also estimate the local noise power by calculating the ANPI.

每个 STA 需要对每一个能接收到的帧解调媒体接入控制（Medium Access Control, MAC ) 帧头，以确定该帧是否发送给自己。 STA根据这些信息确定自己能听到的 STA, 并记录这些 STA。例如，第一 STA能够听到第二 STA的信息，发现第二 STA处于自己的邻近区域。当第一 STA与第二 STA之间有业务时，第一 STA首先判断第二 STA是否处于自己的邻近区域的 STA列表里。如果不在，则放弃建立直接链路，转而通过正常链路通信。如果在列表里，则向第二 STA 以额定功率发送发现请求帧，例如，设备到设备 ( Device to Device, D2D ) Discovery Request帧。第二 STA以额定功率回复发现响应帧，例如， D2D Discovery Response帧。第一 STA和第二 STA 才艮据 D2D Discovery Request帧和 D2D Discovery Response帧的交互估计两者之间的链路信息，如衰落信息。第一 STA和第二 STA建立直接链路通信关系，并将本地保存的噪声功率和两者之间的链路信息上报给 AP, 其中，第一 STA和第二 STA之间的链路信息可以由第一 STA和第二 STA中的任意一个发送给 AP。 Each STA needs to demodulate the Medium Access Control (MAC) header for each frame that can be received to determine if the frame is sent to itself. Based on this information, the STA determines the STAs that it can hear and records these STAs. For example, the first STA can hear the information of the second STA and find that the second STA is in its neighboring area. When there is a service between the first STA and the second STA, the first STA first determines whether the second STA is in the STA list of its neighboring area. If not, abandon the establishment of a direct link and then communicate over the normal link. If it is in the list, the discovery request frame is sent to the second STA at the rated power, for example, a Device to Device (D2D) Discovery Request frame. The second STA replies with a discovery response frame at a rated power, for example, a D2D Discovery Response frame. The first STA and the second STA estimate link information, such as fading information, between the D2D Discovery Request frame and the D2D Discovery Response frame according to the interaction between the D2D Discovery Request frame and the D2D Discovery Response frame. The first STA and the second STA establish a direct link communication relationship, and report the locally saved noise power and the link information between the two STAs to the AP, where the link information between the first STA and the second STA may be It is sent to the AP by any one of the first STA and the second STA.

第一 STA和第二 STA要进行直接链路通信时，第一 STA (或第二 STA ) 向 AP发送该直接链路通信的传输资源请求，向 AP申请传输资源。 AP接收到该传输资源请求后，为该直接链路通信分配传输资源。同时， AP选择第三 STA, 例如，选择离第一 STA和第二 STA较远的 STA。 AP为第三 STA 分配与该直接链路通信的传输资源重叠的传输资源。为了同时调度传输资源与该直接链路通信的传输资源重叠的第三 STA, AP一并确定该直接链路通信的发送功率以及第三 STA的发送功率。具体地， AP根据之前获得的该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA 的本地噪声功率，确定该直接链路通信的发送功率以及第三 STA的发送功率，使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值。 When the first STA and the second STA are to perform direct link communication, the first STA (or the second STA) sends a transmission resource request of the direct link communication to the AP, and requests the transmission resource from the AP. After receiving the transmission resource request, the AP allocates transmission resources for the direct link communication. At the same time, the AP selects the third STA, for example, selects a STA that is farther away from the first STA and the second STA. The AP allocates, to the third STA, a transmission resource that overlaps with the transmission resource of the direct link communication. In order to simultaneously schedule the third STA whose transmission resource overlaps with the transmission resource of the direct link communication, the AP determines the transmission power of the direct link communication and the transmission power of the third STA. Specifically, the AP obtains, according to the previously obtained link information between the first STA and the second STA, link information between the AP and the STA, location information of each STA, and locality of the AP. Determining, by the noise power, the local noise power of the first STA, and the local noise power of the second STA, the transmit power of the direct link communication and the transmit power of the third STA, so that the direct link communication and the third STA The interference between the transmissions is below a predetermined value.

例如，假设第三 STA的传输为第三 STA与 AP的正常链路通信，参考图 1 , STA 101和 STA 102之间的直接链路通信对 STA 103与 AP 100的传输的干扰为 STA 101和 STA 102以直接链路通信的功率发送数据时对 AP 100 接收 STA 103发送的数据和 STA 103接收 AP 100发送的数据的干扰，可以用直接链路通信的功率， STA 103的发送功率， AP与每个 STA之间的链路信息、 AP的本地噪声功率表示出； STA 103与 AP 100的传输对 STA 101和 STA 102之间的直接链路通信的干扰为 STA 103向 AP 100发送数据和 AP 100 向 STA 103发送数据时对 STA 101接收 STA 102的数据以及 STA 102接收 STA 101的数据的干扰，可以用直接链路通信的功率， STA 103的发送功率， STA 101和 STA 102之间的链路信息， STA 103和 STA 101之间的链路信息， STA 103和 STA 101之间的链路信息， STA 101的本地噪声功率以及 STA 102 的本地噪声功率表示出，其中， STA 103和 STA 101之间的链路信息，以及 STA 103和 STA 101之间的链路信息可以由 AP与每个 STA之间的链路信息和每个 STA的位置信息计算得到。 For example, assuming that the transmission of the third STA is a normal link communication between the third STA and the AP, referring to FIG. 1, the interference of the direct link communication between the STA 101 and the STA 102 to the transmission of the STA 103 and the AP 100 is STA 101 and When the STA 102 transmits data in the power of the direct link communication, the AP 100 receives the data transmitted by the STA 103 and the STA 103 receives the data transmitted by the AP 100, and can use the power of the direct link communication, the transmission power of the STA 103, the AP and the The link information between each STA, the local noise power of the AP is represented; the interference of the transmission of the STA 103 and the AP 100 to the direct link communication between the STA 101 and the STA 102 is that the STA 103 transmits data and the AP to the AP 100. 100. When the data is transmitted to the STA 103, the STA 101 receives the data of the STA 102 and the STA 102 receives the data of the STA 101. The power of the direct link communication, the transmission power of the STA 103, the chain between the STA 101 and the STA 102 can be used. Road information, link information between STA 103 and STA 101, link information between STA 103 and STA 101, local noise power of STA 101, and STA 102 The local noise power is shown, wherein the link information between the STA 103 and the STA 101, and the link information between the STA 103 and the STA 101 can be link information between the AP and each STA and each STA The location information is calculated.

AP在直接链路通信和第三 STA的传输相互之间的干扰低于预定值的条件下确定出直接链路通信的发送功率和第三 STA的发送功率。 AP可以先确定直接链路通信的发送功率再确定第三 STA 的发送功率，也可以先确定第三 STA的发送功率再确定直接链路通信的发送功率。 The AP determines the transmission power of the direct link communication and the transmission power of the third STA under the condition that the interference between the direct link communication and the transmission of the third STA is lower than a predetermined value. The AP may determine the transmit power of the direct link communication and then determine the transmit power of the third STA, or determine the transmit power of the third STA and then determine the transmit power of the direct link communication.

可选地，在本发明的一个实施例中， AP确定该直接链路通信的发送功率以及第三 STA的发送功率，包括： Optionally, in an embodiment of the present invention, the AP determines the transmit power of the direct link communication and the transmit power of the third STA, including:

该 AP根据该第一 STA和该第二 STA之间的链路信息、该第一 STA的本地噪声功率以及该第二 STA 的本地噪声功率，确定该直接链路通信的发送功率； Determining, by the AP, the transmit power of the direct link communication according to the link information between the first STA and the second STA, the local noise power of the first STA, and the local noise power of the second STA;

在本实施例中， AP先根据该第一 STA和该第二 STA之间的链路信息、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率，再在直接链路通信和第三 STA 的传输相互之间的干扰低于预定值的条件下，根据该直接链路通信的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该第三 STA的发送功率。 In this embodiment, the AP determines the direct link communication according to the link information between the first STA and the second STA, the local noise power of the first STA, and the local noise power of the second STA. Transmitting power, according to the transmission power of the direct link communication, between the first STA and the second STA, under the condition that the interference between the direct link communication and the transmission of the third STA is lower than a predetermined value Link information, link information between the AP and each STA, location information of each STA, local noise power of the AP, local noise power of the first STA, and local noise power of the second STA , determining the transmit power of the third STA.

可选地，在本发明的另一个实施例中， AP确定该直接链路通信的发送功率以及第三 STA的发送功率，包括： Optionally, in another embodiment of the present invention, the AP determines the transmit power of the direct link communication and the transmit power of the third STA, including:

该 AP根据该 AP与该第三 STA之间的链路信息、该 AP的本地噪声功率，确定该第三 STA的发送功率； The AP determines the transmit power of the third STA according to the link information between the AP and the third STA and the local noise power of the AP.

该 AP根据该第三 STA的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率。在本实施例中， AP先根据该 AP与该第三 STA之间的链路信息、该 AP 的本地噪声功率，确定该第三 STA 的发送功率，再在直接链路通信和第三 STA的传输相互之间的干扰低于预定值的条件下，根据该第三 STA的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率。 The AP is configured according to the sending power of the third STA, the link information between the first STA and the second STA, the link information between the AP and the STA, the location information of each STA, The local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication. In this embodiment, the AP first determines the transmit power of the third STA according to the link information between the AP and the third STA, and the local noise power of the AP, and then in the direct link communication and the third STA. The transmission power of the third STA, the link information between the first STA and the second STA, and the chain between the AP and the STA are performed on a condition that the interference between the APs is lower than a predetermined value. The path information, the location information of each STA, the local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmission power of the direct link communication.

可选地，第一 STA和第二 STA也可以自行确定直接链路通信的发送功率，并发送给 AP; AP根据该直接链路通信的发送功率选择第三 STA并确定第三 STA的发送功率。在这种情况下，若 AP确定该直接链路通信的发送功率合适，则可以只在向第一 STA和第二 STA发送的调度信息中指示传输资源；若 AP确定该直接链路通信的发送功率不合适，则可以重新确定直接链路通信的发送功率，并在向第一 STA和第二 STA发送的调度信息中指示传输资源和重新确定的直接链路通信的发送功率。 Optionally, the first STA and the second STA may also determine the transmit power of the direct link communication and send the power to the AP. The AP selects the third STA according to the transmit power of the direct link communication and determines the transmit power of the third STA. . In this case, if the AP determines that the transmission power of the direct link communication is appropriate, the transmission resource may be indicated only in the scheduling information sent to the first STA and the second STA; if the AP determines the transmission of the direct link communication If the power is not suitable, the transmission power of the direct link communication may be re-determined, and the transmission power of the transmission resource and the re-determined direct link communication is indicated in the scheduling information transmitted to the first STA and the second STA.

本发明实施例的直接链路通信的方法，通过确定第一 STA和第二 STA 的直接链路通信的发送功率和第三 STA 的发送功率，使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值，可以使第一 STA和第二 STA 的直接链路通信与第三 STA的传输同时进行，因此可以充分利用频谱资源，从而能够提升网络效率。 The method for direct link communication in the embodiment of the present invention, the direct link communication and the transmission of the third STA are determined by determining the transmit power of the direct link communication of the first STA and the second STA and the transmit power of the third STA. The mutual interference is lower than the predetermined value, and the direct link communication between the first STA and the second STA can be simultaneously performed with the transmission of the third STA, so that the spectrum resources can be fully utilized, thereby improving network efficiency.

以上从 AP的角度详细描述了本发明实施例的直接链路通信的方法，下面从第一 STA的角度详细描述本发明实施例的直接链路通信的方法。 The method for direct link communication in the embodiment of the present invention is described in detail above from the perspective of the AP. The method for direct link communication in the embodiment of the present invention is described in detail below from the perspective of the first STA.

图 3示出了根据本发明实施例的直接链路通信的方法 300的示意性流程图。如图 3所示，该方法 300包括： FIG. 3 shows a schematic flow diagram of a method 300 of direct link communication in accordance with an embodiment of the present invention. As shown in FIG. 3, the method 300 includes:

S310, 第一 STA向 AP发送该第一 STA和第二 STA之间的直接链路通信的传输资源请求； S310. The first STA sends a transmission resource request for direct link communication between the first STA and the second STA to the AP.

S320, 该第一 STA接收该 AP发送的第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，其中，该直接链路通信的发送功率和第三 STA的发送功率由该 AP确定，该第三 STA的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； S330, 该第一 STA在该直接链路通信的传输资源上使用该直接链路通信的发送功率与该第二 STA进行直接链路通信。 S320, the first STA receives the first scheduling information sent by the AP, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, where the transmission power of the direct link communication The transmission power of the third STA is determined by the AP, the transmission resource of the third STA overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the transmission power of the third STA enable the direct chain The interference between the road communication and the transmission of the third STA is lower than a predetermined value; S330. The first STA performs direct link communication with the second STA by using the transmit power of the direct link communication on the transmission resource of the direct link communication.

在本发明实施例中，该方法 300的执行主体第一 STA可以是图 1 中的 STA 101或 STA 102, 相应地，第二 STA可以是 STA 102或 STA 101 ; 第三 STA可以是图 1中的 STA 103; AP可以是图 1中的 AP 100。 In the embodiment of the present invention, the first STA of the method 300 may be the STA 101 or the STA 102 in FIG. 1 , and the second STA may be the STA 102 or the STA 101. The third STA may be in FIG. 1 . The STA 103; the AP may be the AP 100 in FIG.

第一 STA和第二 STA要进行直接链路通信时，第一 STA向 AP发送该直接链路通信的传输资源请求，向 AP 申请传输资源。 AP接收到该传输资源请求后，为该直接链路通信分配传输资源。同时， AP选择第三 STA, 例如，选择离第一 STA和第二 STA较远的 STA。 AP为第三 STA分配与该直接链路通信的传输资源重叠的传输资源。为了同时调度第三 STA, AP—并确定该直接链路通信的发送功率以及第三 STA 的发送功率，以使该直接链路通信和该第三 STA 的传输相互之间的干扰低于预定值，即该直接链路通信对该第三 STA的传输的干扰低于预定值并且该第三 STA的传输对该直接链路通信的干扰低于预定值。该 AP向该第一 STA和该第二 STA发送第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，向该第三 STA发送第二调度信息，该第二调度信息指示该第三 STA的发送功率和该第三 STA的传输资源。该第一 STA接收该 AP发送的第一调度信息，在该直接链路通信的传输资源上使用该直接链路通信的发送功率与该第二 STA进行直接链路通信。由于 AP确定的该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值，因此，第一 STA和第二 STA的直接链路通信能够与第三 STA的传输同时进行，从而提升了网络效率。 When the first STA and the second STA are to perform direct link communication, the first STA sends a transmission resource request of the direct link communication to the AP, and requests the transmission resource from the AP. After receiving the transmission resource request, the AP allocates transmission resources for the direct link communication. At the same time, the AP selects a third STA, for example, selecting a STA that is farther away from the first STA and the second STA. The AP allocates, to the third STA, a transmission resource that overlaps with the transmission resource of the direct link communication. In order to simultaneously schedule the third STA, the AP - and determine the transmission power of the direct link communication and the transmission power of the third STA, so that the interference between the direct link communication and the transmission of the third STA is lower than a predetermined value That is, the interference of the direct link communication to the transmission of the third STA is lower than a predetermined value and the interference of the transmission of the third STA to the direct link communication is lower than a predetermined value. The AP sends first scheduling information to the first STA and the second STA, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, and sends a second to the third STA. Scheduling information indicating the transmission power of the third STA and the transmission resource of the third STA. The first STA receives the first scheduling information sent by the AP, and performs direct link communication with the second STA by using the transmit power of the direct link communication on the transmission resource of the direct link communication. Since the transmission power of the direct link communication determined by the AP and the transmission power of the third STA make the interference between the direct link communication and the transmission of the third STA mutually lower than a predetermined value, the first STA and the first The direct link communication of the two STAs can be performed simultaneously with the transmission of the third STA, thereby improving network efficiency.

因此，本发明实施例的直接链路通信的方法，通过使用 AP确定的使第一 STA和第二 STA的直接链路通信和第三 STA的传输相互之间的干扰低于预定值的直接链路通信的发送功率进行直接链路通信，可以使第一 STA和第二 STA的直接链路通信与第三 STA的传输同时进行，从而能够提升网络效率。 Therefore, the method for direct link communication according to the embodiment of the present invention directly determines that the direct link communication between the first STA and the second STA and the transmission of the third STA are less than a predetermined value by using the AP. The direct communication of the transmission power of the road communication enables the direct link communication between the first STA and the second STA to be performed simultaneously with the transmission of the third STA, thereby improving network efficiency.

在本发明实施例中，可选地，该直接链路通信的发送功率和该第三 STA 的发送功率由该 AP根据该第一 STA和该第二 STA之间的链路信息、该 AP 与该第一 STA、该第二 STA和该第三 STA中的每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率确定。 In the embodiment of the present invention, optionally, the transmit power of the direct link communication and the transmit power of the third STA are determined by the AP according to link information between the first STA and the second STA, and the AP Link information between the first STA, the second STA, and each of the third STAs, location information of each STA, local noise power of the AP, local noise of the first STA The power and the local noise power of the second STA are determined.

在这种情况下，在该第一 STA向 AP发送该第一 STA和第二 STA之间的直接链路通信的传输资源请求之前，该方法 300还包括： In this case, before the first STA sends the transmission resource request of the direct link communication between the first STA and the second STA to the AP, the method 300 further includes:

例如，第一 STA在关联过程中，将自己的位置信息上报给 AP。 For example, the first STA reports its location information to the AP during the association process.

第一 STA在关联到 AP时， AP根据第一 STA发送的关联帧估计第一 STA 与 AP之间的链路信息，例如衰落信息。 When the first STA is associated with the AP, the AP estimates link information, such as fading information, between the first STA and the AP according to the associated frame sent by the first STA.

第一 STA估计自己的本地噪声功率，并保存。例如，第一 STA可以通过计算 ANPI来估计本地噪声功率。 The first STA estimates its own local noise power and saves it. For example, the first STA can estimate the local noise power by calculating the ANPI.

每个 STA需要对每一个能接收到的帧解调 MAC帧头，以确定该帧是否发送给自己。 STA根据这些信息确定自己能听到的 STA, 并记录这些 STA。例如，第一 STA能够听到第二 STA的信息，发现第二 STA处于自己的邻近区域。当第一 STA与第二 STA之间有业务时，第一 STA首先判断第二 STA 是否处于自己的邻近区域的 STA列表里。如果不在，则放弃建立直接链路，转而通过正常链路通信。如果在列表里，则向第二 STA 以额定功率发送发现请求帧，例如， D2D Discovery Request帧。第二 STA以额定功率回复发现响应帧，例如， D2D Discovery Response帧。第一 STA和第二 STA根据 D2D Discovery Request帧和 D2D Discovery Response帧的交互估计两者之间的链路信息，如衰落信息。 Each STA needs to demodulate the MAC frame header for each frame that can be received to determine if the frame is sent to itself. Based on this information, the STA determines the STAs that it can hear and records these STAs. For example, the first STA can hear the information of the second STA and find that the second STA is in its neighboring area. When there is a service between the first STA and the second STA, the first STA first determines whether the second STA is in the STA list of its neighboring area. If not, abandon the establishment of a direct link and then communicate over the normal link. If it is in the list, a discovery request frame, for example, a D2D Discovery Request frame, is transmitted to the second STA at the rated power. The second STA replies to the discovery response frame with a rated power, for example, a D2D Discovery Response frame. The first STA and the second STA estimate link information, such as fading information, between the two according to the interaction between the D2D Discovery Request frame and the D2D Discovery Response frame.

可选地，该第一 STA根据该发现响应帧，确定该第一 STA和该第二 STA 之间的链路信息，包括： Optionally, the determining, by the first STA, the link information between the first STA and the second STA according to the discovery response frame, including:

该第一 STA根据该发现响应帧，确定该发现响应帧的接收信号功率；该第一 STA根据该发现响应帧的接收信号功率和该第一 STA的本地噪声功率，确定该发现响应帧的接收信号强度； Determining, by the first STA, the received signal power of the discovery response frame according to the discovery response frame; Determining, by the first STA, a received signal strength of the discovery response frame according to a received signal power of the discovery response frame and a local noise power of the first STA;

例如，第一 STA通过发现响应帧估计 RCPI, 通过 RCPI减去 ANPI获得接收信号强度。由于发现请求帧和发现响应帧是以额定功率发送的，因此由该额定功率减去接收信号强度可以估计直接链路通信对之间的链路信息。 For example, the first STA estimates the RCPI by finding the response frame, and subtracts the ANPI from the RCPI to obtain the received signal strength. Since the discovery request frame and the discovery response frame are transmitted at rated power, the link information between the direct link communication pairs can be estimated by subtracting the received signal strength from the rated power.

应理解，对于第二 STA来说，可以根据发现请求帧，确定第一 STA和第二 STA之间的链路信息。 It should be understood that, for the second STA, the link information between the first STA and the second STA may be determined according to the discovery request frame.

第一 STA和第二 STA建立直接链路通信关系，并将本地保存的噪声功率和两者之间的链路信息上报给 AP, 其中，第一 STA和第二 STA之间的链路信息可以由第一 STA和第二 STA中的任意一个发送给 AP, 例如由第一 STA发送。 The first STA and the second STA establish a direct link communication relationship, and report the locally saved noise power and the link information between the two STAs to the AP, where the link information between the first STA and the second STA may be It is sent to the AP by any one of the first STA and the second STA, for example, sent by the first STA.

第一 STA和第二 STA要进行直接链路通信时，第一 STA向 AP发送该直接链路通信的传输资源请求，向 AP 申请传输资源。 AP接收到该传输资源请求后，为该直接链路通信分配传输资源。为了同时调度传输资源与该直接链路通信的传输资源重叠的第三 STA, AP一并确定该直接链路通信的发送功率以及第三 STA的发送功率。具体地， AP根据之前获得的该第一 STA 和该第二 STA之间的链路信息、该 AP与每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA 的本地噪声功率，确定该直接链路通信的发送功率以及第三 STA的发送功率，使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值。 When the first STA and the second STA are to perform direct link communication, the first STA sends a transmission resource request of the direct link communication to the AP, and requests the transmission resource from the AP. After receiving the transmission resource request, the AP allocates transmission resources for the direct link communication. In order to simultaneously schedule the third STA whose transmission resource overlaps with the transmission resource of the direct link communication, the AP determines the transmission power of the direct link communication and the transmission power of the third STA. Specifically, the AP obtains link information between the first STA and the second STA, link information between the AP and each STA, location information of each STA, and local noise of the AP. Determining the transmit power of the direct link communication and the transmit power of the third STA, the direct link communication and the third STA transmission, the power, the local noise power of the first STA, and the local noise power of the second STA The interference between each other is lower than a predetermined value.

例如，假设第三 STA的传输为第三 STA与 AP的正常链路通信，参考图 1 , STA 101和 STA 102之间的直接链路通信对 STA 103与 AP 100的传输的干扰为 STA 101和 STA 102以直接链路通信的功率发送数据时对 AP 100 接收 STA 103发送的数据和 STA 103接收 AP 100发送的数据的干扰，可以用直接链路通信的功率， STA 103的发送功率， AP与每个 STA之间的链路信息、 AP的本地噪声功率表示出； STA 103与 AP 100的传输对 STA 101和 STA 102之间的直接链路通信的干扰为 STA 103向 AP 100发送数据和 AP 100 向 STA 103发送数据时对 STA 101接收 STA 102的数据以及 STA 102接收 STA 101的数据的干扰，可以用直接链路通信的功率， STA 103的发送功率， STA 101和 STA 102之间的链路信息， STA 103和 STA 101之间的链路信息， STA 103和 STA 101之间的链路信息， STA 101的本地噪声功率以及 STA 102 的本地噪声功率表示出，其中， STA 103和 STA 101之间的链路信息，以及 STA 103和 STA 101之间的链路信息可以由 AP与每个 STA之间的链路信息和每个 STA的位置信息计算得到。 For example, assuming that the transmission of the third STA is a normal link communication between the third STA and the AP, referring to FIG. 1, the interference of the direct link communication between the STA 101 and the STA 102 to the transmission of the STA 103 and the AP 100 is STA 101 and When the STA 102 transmits data in the power of the direct link communication, the AP 100 receives the data transmitted by the STA 103 and the STA 103 receives the data transmitted by the AP 100, and can use the power of the direct link communication, the transmission power of the STA 103, the AP and the The link information between each STA, the local noise power of the AP is represented; the interference of the transmission of the STA 103 and the AP 100 to the direct link communication between the STA 101 and the STA 102 is that the STA 103 transmits data and the AP to the AP 100. 100 receives the data of the STA 102 and the STA 102 receives the STA 101 when transmitting data to the STA 103 The interference of the data of the STA 101, the power of the direct link communication, the transmission power of the STA 103, the link information between the STA 101 and the STA 102, the link information between the STA 103 and the STA 101, the STA 103 and the STA The link information between 101, the local noise power of the STA 101, and the local noise power of the STA 102 are shown, wherein the link information between the STA 103 and the STA 101, and the link information between the STA 103 and the STA 101 It can be calculated by the link information between the AP and each STA and the location information of each STA.

AP在直接链路通信和第三 STA的传输相互之间的干扰低于预定值的条件下确定出直接链路通信的发送功率和第三 STA的发送功率。第一 STA使用该直接链路通信的发送功率与第二 STA进行直接链路通信。 The AP determines the transmission power of the direct link communication and the transmission power of the third STA under the condition that the interference between the direct link communication and the transmission of the third STA is lower than a predetermined value. The first STA performs direct link communication with the second STA using the transmission power of the direct link communication.

本发明实施例的直接链路通信的方法，通过使用 AP确定的使第一 STA 和第二 STA的直接链路通信和第三 STA的传输相互之间的干扰低于预定值的直接链路通信的发送功率进行直接链路通信，可以使第一 STA和第二 STA 的直接链路通信与第三 STA的传输同时进行，因此可以充分利用频谱资源，从而能够提升网络效率。 The method for direct link communication according to the embodiment of the present invention, the direct link communication that causes the direct link communication between the first STA and the second STA and the transmission of the third STA to be less than a predetermined value by using the AP The transmission power of the direct link communication enables the direct link communication between the first STA and the second STA to be performed simultaneously with the transmission of the third STA, so that the spectrum resources can be fully utilized, thereby improving network efficiency.

应理解，在本发明实施例中， AP侧描述的 AP、第一 STA、第二 STA 和第三 STA相互之间的交互及相关特性、功能等与第一 STA侧的描述相应，为了筒洁，在此不再赘述。 It should be understood that, in the embodiment of the present invention, the interaction between the AP, the first STA, the second STA, and the third STA described on the AP side and related features, functions, and the like correspond to the description of the first STA side, , will not repeat them here.

应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。 It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention. The implementation process constitutes any limitation.

上文中详细描述了根据本发明实施例的直接链路通信的方法，下面将描述根据本发明实施例的 AP和 STA。 The method of direct link communication according to an embodiment of the present invention is described in detail above, and an AP and a STA according to an embodiment of the present invention will be described below.

图 4示出了根据本发明实施例的 AP 400的示意性框图。如图 4所示，该 AP 400包括： FIG. 4 shows a schematic block diagram of an AP 400 in accordance with an embodiment of the present invention. As shown in FIG. 4, the AP 400 includes:

接收模块 410, 用于接收第一站点 STA发送的该第一 STA和第二 STA 之间的直接链路通信的传输资源请求； The receiving module 410 is configured to receive, by the first station STA, a transmission resource request for direct link communication between the first STA and the second STA;

确定模块 420, 用于根据该传输资源请求确定该直接链路通信的传输资源，并且确定该直接链路通信的发送功率以及第三 STA的发送功率，其中，该第三 STA 的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值；发送模块 430, 用于向该第一 STA和该第二 STA发送第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，并向该第三 STA发送第二调度信息，该第二调度信息指示该第三 STA 的发送功率和该第三 STA的传输资源，以使该第一 STA和该第二 STA根据该第一调度信息进行直接链路通信，该第三 STA根据该第二调度信息发送数据。 a determining module 420, configured to determine, according to the transmission resource request, a transmission resource of the direct link communication, and determine a transmission power of the direct link communication and a transmission power of the third STA, where the transmission resource of the third STA is The transmission resources of the direct link communication overlap, the transmission power of the direct link communication and the transmission power of the third STA make the interference between the direct link communication and the transmission of the third STA mutually lower than a predetermined value; The sending module 430 is configured to send first scheduling information to the first STA and the second STA, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, and the The third STA sends the second scheduling information, where the second scheduling information indicates the sending power of the third STA and the transmission resource of the third STA, so that the first STA and the second STA perform direct chain according to the first scheduling information. In the road communication, the third STA sends data according to the second scheduling information.

本发明实施例的 AP,通过确定第一 STA和第二 STA的直接链路通信的发送功率和第三 STA的发送功率，使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值，可以使第一 STA和第二 STA的直接链路通信与第三 STA的传输同时进行，从而能够提升网络效率。 The AP of the embodiment of the present invention determines the interference between the direct link communication and the transmission of the third STA by determining the transmission power of the direct link communication of the first STA and the second STA and the transmission power of the third STA. Below the predetermined value, the direct link communication of the first STA and the second STA can be performed simultaneously with the transmission of the third STA, thereby improving network efficiency.

在本发明实施例中，可选地，该接收模块 410还用于接收该第一 STA、该第二 STA和该第三 STA中的每个 STA发送的该每个 STA的位置信息，接收该第一 STA发送的该第一 STA的本地噪声功率以及该第一 STA和该第二 STA之间的链路信息，接收该第二 STA发送的该第二 STA的本地噪声功率；该确定模块 420还用于确定该 AP的本地噪声功率，根据该每个 STA在关联过程中发送的关联帧，确定该 AP与该每个 STA之间的链路信息； In the embodiment of the present invention, the receiving module 410 is further configured to receive location information of each STA sent by each of the first STA, the second STA, and the third STA, and receive the location information. The local noise power of the first STA and the link information between the first STA and the second STA sent by the first STA receive the local noise power of the second STA sent by the second STA; the determining module 420 And determining the local noise power of the AP, and determining link information between the AP and each STA according to the associated frame sent by each STA in the association process;

该确定模块 420具体用于根据该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP 的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率以及第三 STA的发送功率。 The determining module 420 is specifically configured to: according to link information between the first STA and the second STA, link information between the AP and each STA, location information of each STA, local to the AP The noise power, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication and the transmit power of the third STA.

在本发明实施例中，可选地，该确定模块 420具体用于根据该第一 STA 和该第二 STA之间的链路信息、该第一 STA的本地噪声功率以及该第二 STA 的本地噪声功率，确定该直接链路通信的发送功率，根据该直接链路通信的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA 之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该第三 STA的发送功率。 In the embodiment of the present invention, the determining module 420 is specifically configured to: according to link information between the first STA and the second STA, local noise power of the first STA, and local to the second STA a noise power, determining a transmit power of the direct link communication, according to a transmit power of the direct link communication, link information between the first STA and the second STA, and a chain between the AP and each STA The path information, the location information of each STA, the local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the third STA.

在本发明实施例中，可选地，该确定模块 420具体用于根据该 AP与该第三 STA之间的链路信息、该 AP的本地噪声功率，确定该第三 STA的发送功率，根据该第三 STA的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率。 In the embodiment of the present invention, the determining module 420 is specifically configured to determine, according to the link information between the AP and the third STA, the local noise power of the AP, the sending power of the third STA, according to The transmit power of the third STA, the link information between the first STA and the second STA, the link information between the AP and the STA, the location information of each STA, The local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication.

在本发明实施例中，可选地，该确定模块 420具体用于根据该关联帧确定该关联帧的接收信号功率，根据该关联帧的接收信号功率和该 AP的本地噪声功率确定该关联帧的接收信号强度，根据该关联帧的额定发送功率和该关联帧的接收信号强度确定该 AP与该每个 STA之间的链路信息。 In the embodiment of the present invention, the determining module 420 is specifically configured to determine, according to the associated frame, a received signal power of the associated frame, and determine the associated frame according to the received signal power of the associated frame and the local noise power of the AP. The received signal strength determines the link information between the AP and the STA according to the rated transmit power of the associated frame and the received signal strength of the associated frame.

根据本发明实施例的 AP 400可对应于根据本发明实施例的直接链路通信的方法中的 AP,并且 AP 400中的各个模块的上述和其它操作和 /或功能分别为了实现前述各个方法的相应流程，为了筒洁，在此不再赘述。 The AP 400 according to an embodiment of the present invention may correspond to an AP in a method of direct link communication according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in the AP 400 are respectively implemented to implement the foregoing respective methods. The corresponding process, for the sake of cleanliness, will not be repeated here.

本发明实施例的 AP,通过确定第一 STA和第二 STA的直接链路通信的发送功率和第三 STA的发送功率，使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值，可以使第一 STA和第二 STA的直接链路通信与第三 STA 的传输同时进行，因此可以充分利用频谱资源，从而能够提升网络效率。 The AP of the embodiment of the present invention determines the interference between the direct link communication and the transmission of the third STA by determining the transmission power of the direct link communication of the first STA and the second STA and the transmission power of the third STA. Below the predetermined value, the direct link communication of the first STA and the second STA can be performed simultaneously with the transmission of the third STA, so that the spectrum resources can be fully utilized, thereby improving network efficiency.

图 5示出了根据本发明实施例的 STA 500的示意性框图。如图 5所示，该 STA 500包括： FIG. 5 shows a schematic block diagram of a STA 500 in accordance with an embodiment of the present invention. As shown in FIG. 5, the STA 500 includes:

发送模块 510,用于向接入点 AP发送该 STA和第二 STA之间的直接链路通信的传输资源请求； The sending module 510 is configured to send, to the access point AP, a transmission resource request for direct link communication between the STA and the second STA;

接收模块 520, 用于接收该 AP发送的第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，其中，该直接链路通信的发送功率和第三 STA的发送功率由该 AP确定，该第三 STA 的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； The receiving module 520 is configured to receive first scheduling information that is sent by the AP, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, where the transmission power of the direct link communication The transmission power of the third STA is determined by the AP, the transmission resource of the third STA overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the transmission power of the third STA enable the direct chain The interference between the road communication and the transmission of the third STA is lower than a predetermined value;

操作模块 530, 用于在该直接链路通信的传输资源上使用该直接链路通信的发送功率与该第二 STA进行直接链路通信。 The operation module 530 is configured to perform direct link communication with the second STA by using the transmit power of the direct link communication on the transmission resource of the direct link communication.

本发明实施例的 STA, 通过使用 AP确定的使该 STA和第二 STA的直接链路通信和第三 STA 的传输相互之间的干扰低于预定值的直接链路通信的发送功率进行直接链路通信，可以使该 STA和第二 STA的直接链路通信与第三 STA的传输同时进行，从而能够提升网络效率。 The STA of the embodiment of the present invention directly directs the transmission power of the direct link communication in which the direct link communication between the STA and the second STA and the transmission of the third STA are less than a predetermined value by using the AP. In the road communication, the direct link communication between the STA and the second STA can be performed simultaneously with the transmission of the third STA, thereby improving network efficiency.

在本发明实施例中，可选地，该直接链路通信的发送功率和该第三 STA 的发送功率由该 AP根据该 STA和该第二 STA之间的链路信息、该 AP与该 STA、该第二 STA和该第三 STA中的每个 STA之间的链路信息、该每个 STA 的位置信息、该 AP的本地噪声功率、该 STA的本地噪声功率以及该第二 STA的本地噪声功率确定； In the embodiment of the present invention, optionally, the transmit power of the direct link communication and the third STA The transmission power is determined by the AP according to the link information between the STA and the second STA, the link information between the AP and the STA, the second STA, and each of the STAs in the third STA. The location information of the STA, the local noise power of the AP, the local noise power of the STA, and the local noise power of the second STA are determined;

该发送模块 510还用于向该 AP发送该 STA的位置信息，在关联过程中向该 AP发送关联帧以使该 AP确定该 AP与该 STA之间的链路信息，以额定功率向该第二 STA发送发现请求帧； The sending module 510 is further configured to send the location information of the STA to the AP, and send an associated frame to the AP in the association process, so that the AP determines link information between the AP and the STA, and uses the rated power to the first Two STAs send a discovery request frame;

该接收模块 520还用于接收该第二 STA以额定功率发送的发现响应帧；该 STA 500还包括： The receiving module 520 is further configured to receive a discovery response frame that is sent by the second STA at a rated power; the STA 500 further includes:

该发送模块 510还用于向该 AP发送该 STA的本地噪声功率以及该 STA 和该第二 STA之间的链路信息。 The sending module 510 is further configured to send, to the AP, local noise power of the STA and link information between the STA and the second STA.

在本发明实施例中，可选地，该确定模块具体用于根据该发现响应帧确定该发现响应帧的接收信号功率，根据该发现响应帧的接收信号功率和该 STA的本地噪声功率确定该发现响应帧的接收信号强度，根据该发现响应帧的额定发送功率和该发现响应帧的接收信号强度确定该 STA和该第二 STA 之间的链路信息。信的方法中的第一 STA, 并且 STA 500中的各个模块的上述和其它操作和 / 或功能分别为了实现前述各个方法的相应流程，为了筒洁，在此不再赘述。 In the embodiment of the present invention, the determining module is specifically configured to determine, according to the discovery response frame, the received signal power of the discovery response frame, and determine the received signal power of the discovery response frame and the local noise power of the STA. The received signal strength of the response frame is found, and the link information between the STA and the second STA is determined according to the rated transmit power of the discovery response frame and the received signal strength of the discovery response frame. The first STA in the method of the letter, and the above-mentioned and other operations and/or functions of the respective modules in the STA 500 are respectively omitted in order to implement the corresponding processes of the foregoing respective methods.

本发明实施例的 STA, 通过使用 AP确定的使该 STA和第二 STA的直接链路通信和第三 STA 的传输相互之间的干扰低于预定值的直接链路通信的发送功率进行直接链路通信，可以使该 STA和第二 STA的直接链路通信与第三 STA 的传输同时进行，因此可以充分利用频谱资源，从而能够提升网络效率。 The STA of the embodiment of the present invention directly directs the transmission power of the direct link communication in which the direct link communication between the STA and the second STA and the transmission of the third STA are less than a predetermined value by using the AP. In the road communication, the direct link communication between the STA and the second STA can be performed simultaneously with the transmission of the third STA, so that the spectrum resources can be fully utilized, thereby improving network efficiency.

图 6示出了本发明的又一实施例提供的 AP的结构，包括至少一个处理器 602 (例如 CPU ),至少一个网络接口 605或者其他通信接口，存储器 606, 和至少一个通信总线 603 , 用于实现这些部件之间的连接通信。处理器 602 用于执行存储器 606中存储的可执行模块，例如计算机程序。存储器 606可能包含高速随机存取存储器（RAM: Random Access Memory ), 也可能还包括非不稳定的存储器（non-volatile memory ), 例如至少一个磁盘存储器。通过至少一个网络接口 605 (可以是有线或者无线）实现与至少一个其他网元之间的通信连接。 FIG. 6 shows a structure of an AP according to still another embodiment of the present invention, including at least one processor 602 (for example, a CPU), at least one network interface 605 or other communication interface, a memory 606, and at least one communication bus 603. To achieve connection communication between these components. The processor 602 is configured to execute executable modules, such as computer programs, stored in the memory 606. The memory 606 may include a random access memory (RAM: Random Access Memory), and may also include A non-volatile memory, such as at least one disk storage. A communication connection with at least one other network element is achieved by at least one network interface 605 (which may be wired or wireless).

在一些实施方式中，存储器 606存储了程序 6061 ,处理器 602执行程序 6061 , 用于执行以下操作： In some embodiments, memory 606 stores program 6061, and processor 602 executes program 6061 for performing the following operations:

通过网络接口 605接收第一 STA发送的该第一 STA和第二 STA之间的直接链路通信的传输资源请求； Receiving, by the network interface 605, a transmission resource request for direct link communication between the first STA and the second STA sent by the first STA;

根据该传输资源请求，确定该直接链路通信的传输资源； Determining, according to the transmission resource request, a transmission resource of the direct link communication;

确定该直接链路通信的发送功率以及第三 STA 的发送功率，其中，该第三 STA 的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； Determining the transmit power of the direct link communication and the transmit power of the third STA, where the transmission resource of the third STA overlaps with the transmission resource of the direct link communication, the transmit power of the direct link communication, and the third STA Transmit power such that interference between the direct link communication and the transmission of the third STA is lower than a predetermined value;

通过网络接口 605向该第一 STA和该第二 STA发送第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，并向该第三 STA发送第二调度信息，该第二调度信息指示该第三 STA 的发送功率和该第三 STA的传输资源，以使该第一 STA和该第二 STA根据该第一调度信息进行直接链路通信，该第三 STA根据该第二调度信息发送数据。 Transmitting, by the network interface 605, the first scheduling information to the first STA and the second STA, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, and is sent to the third STA Transmitting the second scheduling information, where the second scheduling information indicates the sending power of the third STA and the transmission resource of the third STA, so that the first STA and the second STA perform direct link communication according to the first scheduling information. The third STA sends data according to the second scheduling information.

可选地，处理器 602还用于， Optionally, the processor 602 is further configured to:

确定该 AP的本地噪声功率； Determining the local noise power of the AP;

通过网络接口 605接收该第一 STA、该第二 STA和该第三 STA中的每个 STA发送的该每个 STA的位置信息； Receiving, by the network interface 605, location information of each STA sent by each of the first STA, the second STA, and the third STA;

根据该每个 STA在关联过程中发送的关联帧，确定该 AP与该每个 STA 之间的链路信息； Determining link information between the AP and each STA according to the associated frame sent by each STA in the association process;

通过网络接口 605接收该第一 STA发送的该第一 STA的本地噪声功率以及该第一 STA和该第二 STA之间的链路信息，接收该第二 STA发送的该第二 STA的本地噪声功率； Receiving, by the network interface 605, the local noise power of the first STA and the link information between the first STA and the second STA, and receiving the local noise of the second STA sent by the second STA Power

处理器 602具体用于根据该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率以及第三 STA的发送功率。可选地，处理器 602具体用于， The processor 602 is specifically configured to: according to link information between the first STA and the second STA, link information between the AP and each STA, location information of each STA, local noise of the AP The power, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication and the transmit power of the third STA. Optionally, the processor 602 is specifically configured to:

根据该第一 STA和该第二 STA之间的链路信息、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率；根据该直接链路通信的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该第三 STA的发送功率。 Determining, according to the link information between the first STA and the second STA, the local noise power of the first STA, and the local noise power of the second STA, the transmit power of the direct link communication; according to the direct link Transmit power of communication, link information between the first STA and the second STA, link information between the AP and the STA, location information of each STA, local noise power of the AP, The local noise power of the first STA and the local noise power of the second STA determine the transmit power of the third STA.

可选地，处理器 602具体用于， Optionally, the processor 602 is specifically configured to:

根据该 AP与该第三 STA之间的链路信息、该 AP的本地噪声功率，确定该第三 STA的发送功率； Determining, according to the link information between the AP and the third STA, the local noise power of the AP, the transmit power of the third STA;

根据该第三 STA的发送功率、该第一 STA和该第二 STA之间的链路信息、该 AP与该每个 STA之间的链路信息、该每个 STA的位置信息、该 AP 的本地噪声功率、该第一 STA的本地噪声功率以及该第二 STA的本地噪声功率，确定该直接链路通信的发送功率。 According to the transmit power of the third STA, the link information between the first STA and the second STA, the link information between the AP and the STA, the location information of each STA, and the AP The local noise power, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication.

根据该关联帧，确定该关联帧的接收信号功率； Determining, according to the associated frame, a received signal power of the associated frame;

根据该关联帧的接收信号功率和该 AP的本地噪声功率，确定该关联帧的接收信号强度； Determining a received signal strength of the associated frame according to the received signal power of the associated frame and the local noise power of the AP;

根据该关联帧的额定发送功率和该关联帧的接收信号强度，确定该 AP 与该每个 STA之间的链路信息。 And determining link information between the AP and each STA according to the rated transmit power of the associated frame and the received signal strength of the associated frame.

从本发明实施例提供的以上技术方案可以看出，本发明实施例通过确定第一 STA和第二 STA的直接链路通信的发送功率和第三 STA的发送功率，使该直接链路通信和该第三 STA 的传输相互之间的干扰低于预定值，可以使第一 STA和第二 STA的直接链路通信与第三 STA的传输同时进行，从而能够提升网络效率。 As can be seen from the foregoing technical solutions provided by the embodiments of the present invention, the embodiment of the present invention determines the direct link communication and the transmit power of the third STA by determining the transmit power of the direct link communication of the first STA and the second STA. The interference between the transmissions of the third STAs is lower than a predetermined value, and the direct link communication between the first STA and the second STA can be performed simultaneously with the transmission of the third STA, thereby improving network efficiency.

图 7示出了本发明的又一实施例提供的 STA的结构，包括至少一个处理器 702 (例如 CPU ), 至少一个网络接口 705或者其他通信接口，存储器 706, 和至少一个通信总线 703, 用于实现这些部件之间的连接通信。处理器 702用于执行存储器 706中存储的可执行模块，例如计算机程序。存储器 706 可能包含高速随机存取存储器（RAM: Random Access Memory ), 也可能还包括非不稳定的存储器（ non-volatile memory ), 例如至少一个磁盘存储器。通过至少一个网络接口 705 (可以是有线或者无线）实现与至少一个其他网元之间的通信连接。 FIG. 7 shows a structure of a STA according to still another embodiment of the present invention, including at least one processor 702 (for example, a CPU), at least one network interface 705 or other communication interface, a memory 706, and at least one communication bus 703. To achieve connection communication between these components. The processor 702 is configured to execute executable modules, such as computer programs, stored in the memory 706. The memory 706 may include a high speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory such as at least one disk memory. A communication connection with at least one other network element is achieved by at least one network interface 705 (which may be wired or wireless).

在一些实施方式中，存储器 706存储了程序 7061 ,处理器 702执行程序 7061 , 用于执行以下操作： In some embodiments, memory 706 stores program 7061, and processor 702 executes program 7061 for performing the following operations:

通过网络接口 705向 AP发送该 STA和第二 STA之间的直接链路通信的传输资源请求； Transmitting a resource request for direct link communication between the STA and the second STA to the AP through the network interface 705;

通过网络接口 705接收该 AP发送的第一调度信息，该第一调度信息指示该直接链路通信的传输资源和该直接链路通信的发送功率，其中，该直接链路通信的发送功率和第三 STA的发送功率由该 AP确定，该第三 STA的传输资源与该直接链路通信的传输资源重叠，该直接链路通信的发送功率和该第三 STA的发送功率使该直接链路通信和该第三 STA的传输相互之间的干扰低于预定值； Receiving, by using the network interface 705, first scheduling information that is sent by the AP, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, where a transmission power of the direct link communication and a The transmission power of the three STAs is determined by the AP, the transmission resource of the third STA overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the transmission power of the third STA enable the direct link communication. The interference with the transmission of the third STA is lower than a predetermined value;

在该直接链路通信的传输资源上使用该直接链路通信的发送功率与该第二 STA进行直接链路通信。 The direct link communication is performed with the second STA using the transmission power of the direct link communication on the transmission resource of the direct link communication.

可选地，该直接链路通信的发送功率和该第三 STA的发送功率由该 AP 根据该 STA和该第二 STA之间的链路信息、该 AP与该 STA、该第二 STA 和该第三 STA中的每个 STA之间的链路信息、该每个 STA的位置信息、该 AP的本地噪声功率、该 STA的本地噪声功率以及该第二 STA的本地噪声功率确定； Optionally, the transmit power of the direct link communication and the transmit power of the third STA are determined by the AP according to link information between the STA and the second STA, the AP and the STA, the second STA, and the Link information between each STA in the third STA, location information of each STA, local noise power of the AP, local noise power of the STA, and local noise power of the second STA are determined;

处理器 702还用于， The processor 702 is also used to,

通过网络接口 705向该 AP发送该 STA的位置信息； Sending the location information of the STA to the AP through the network interface 705;

通过网络接口 705在关联过程中向该 AP发送关联帧，以使该 AP确定该 AP与该 STA之间的链路信息； Sending an association frame to the AP in the association process by the network interface 705, so that the AP determines link information between the AP and the STA;

确定该 STA的本地噪声功率； Determining the local noise power of the STA;

通过网络接口 705以额定功率向该第二 STA发送发现请求帧，接收该第二 STA以额定功率发送的发现响应帧； Sending a discovery request frame to the second STA at a rated power through the network interface 705, and receiving a discovery response frame sent by the second STA at a rated power;

根据该发现响应帧，确定该 STA和该第二 STA之间的链路信息；通过网络接口 705向该 AP发送该 STA的本地噪声功率以及该 STA和该第二 STA之间的链路信息。 And determining, according to the discovery response frame, link information between the STA and the second STA, and transmitting, by using the network interface 705, the local noise power of the STA and the link information between the STA and the second STA.

可选地，处理器 702具体用于， Optionally, the processor 702 is specifically configured to:

根据该发现响应帧，确定该发现响应帧的接收信号功率；根据该发现响应帧的接收信号功率和该 STA 的本地噪声功率，确定该发现响应帧的接收信号强度； Determining, according to the discovery response frame, a received signal power of the discovery response frame; Determining a received signal strength of the discovery response frame according to the received signal power of the discovery response frame and the local noise power of the STA;

根据该发现响应帧的额定发送功率和该发现响应帧的接收信号强度，确定该 STA和该第二 STA之间的链路信息。 And determining link information between the STA and the second STA according to the rated transmit power of the discovery response frame and the received signal strength of the discovery response frame.

从本发明实施例提供的以上技术方案可以看出，本发明实施例通过使用 It can be seen from the above technical solutions provided by the embodiments of the present invention that the embodiments of the present invention are used.

AP确定的使第一 STA和第二 STA的直接链路通信和第三 STA的传输相互之间的干扰低于预定值的直接链路通信的发送功率进行直接链路通信，可以使第一 STA和第二 STA的直接链路通信与第三 STA的传输同时进行，从而能够提升网络效率。 The AP determines that the direct link communication between the direct link communication of the first STA and the second STA and the transmission of the third STA is less than a predetermined value, and the direct link communication is performed, and the first STA may be enabled. The direct link communication with the second STA is performed simultaneously with the transmission of the third STA, thereby improving network efficiency.

应理解，在本发明实施例中，术语 "和 /或"仅仅是一种描述关联对象的关联关系，表示可以存在三种关系。例如， A和 /或 B, 可以表示：单独存在 A, 同时存在 A和 B, 单独存在 B这三种情况。另外，本文中字符 "/" , 一般表示前后关联对象是一种 "或" 的关系。 It should be understood that in the embodiment of the present invention, the term "and/or" is merely an association describing the associated object, indicating that there may be three relationships. For example, A and / or B, can mean: A exists separately, there are A and B, and there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。 Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

所属领域的技术人员可以清楚地了解到，为了描述的方便和筒洁，上述描述的***、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。 A person skilled in the art can clearly understand that, for the convenience and the cleaning of the description, the specific working processes of the system, the device and the unit described above can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

在本申请所提供的几个实施例中，应该理解到，所揭露的***、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个 ***，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。 In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。 The units described as separate components may or may not be physically separate. The components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。 In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器，或者网络设备等）执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括： U盘、移动硬盘、只读存储器（ROM, Read-Only Memory )、随机存取存储器（RAM, Random Access Memory ), 磁碟或者光盘等各种可以存储程序代码的介质。 The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。 The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any equivalent person can be easily conceived within the technical scope of the present invention. Modifications or substitutions are intended to be included within the scope of the invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

权利要求 Rights request

1. 一种接入点 AP, 其特征在于，包括： An access point AP, comprising:

接收模块，用于接收第一站点 STA发送的所述第一 STA和第二 STA之间的直接链路通信的传输资源请求； a receiving module, configured to receive a transmission resource request for direct link communication between the first STA and the second STA sent by the first station STA;

确定模块，用于根据所述传输资源请求确定所述直接链路通信的传输资源，并且确定所述直接链路通信的发送功率以及第三 STA 的发送功率，其中，所述第三 STA 的传输资源与所述直接链路通信的传输资源重叠，所述直接链路通信的发送功率和所述第三 STA 的发送功率使所述直接链路通信和所述第三 STA的传输相互之间的干扰低于预定值； a determining module, configured to determine, according to the transmission resource request, a transmission resource of the direct link communication, and determine a transmission power of the direct link communication and a transmission power of a third STA, where the third STA transmits The resource overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the transmission power of the third STA cause the direct link communication and the transmission of the third STA to be mutually The interference is below a predetermined value;

发送模块，用于向所述第一 STA和所述第二 STA发送第一调度信息，所述第一调度信息指示所述直接链路通信的传输资源和所述直接链路通信的发送功率，并向所述第三 STA发送第二调度信息，所述第二调度信息指示所述第三 STA的发送功率和所述第三 STA的传输资源，以使所述第一 STA 和所述第二 STA根据所述第一调度信息进行直接链路通信，所述第三 STA 根据所述第二调度信息发送数据。 a sending module, configured to send first scheduling information to the first STA and the second STA, where the first scheduling information indicates a transmission resource of the direct link communication and a sending power of the direct link communication, And sending, to the third STA, second scheduling information, where the second scheduling information indicates a sending power of the third STA and a transmission resource of the third STA, so that the first STA and the second The STA performs direct link communication according to the first scheduling information, and the third STA sends data according to the second scheduling information.

2. 根据权利要求 1所述的 AP, 其特征在于， 2. The AP according to claim 1, wherein

所述接收模块还用于接收所述第一 STA、所述第二 STA和所述第三 STA 中的每个 STA发送的所述每个 STA的位置信息，接收所述第一 STA发送的所述第一 STA的本地噪声功率以及所述第一 STA和所述第二 STA之间的链路信息，接收所述第二 STA发送的所述第二 STA的本地噪声功率； The receiving module is further configured to receive location information of each STA sent by each of the first STA, the second STA, and the third STA, and receive the location sent by the first STA. Receiving local noise power of the first STA and link information between the first STA and the second STA, and receiving local noise power of the second STA sent by the second STA;

所述确定模块还用于确定所述 AP的本地噪声功率，根据所述每个 STA 在关联过程中发送的关联帧，确定所述 AP与所述每个 STA之间的链路信息；所述确定模块具体用于根据所述第一 STA和所述第二 STA之间的链路信息、所述 AP与所述每个 STA之间的链路信息、所述每个 STA的位置信息、所述 AP的本地噪声功率、所述第一 STA的本地噪声功率以及所述第二 STA的本地噪声功率，确定所述直接链路通信的发送功率以及第三 STA的发送功率。 The determining module is further configured to determine a local noise power of the AP, and determine link information between the AP and each STA according to the associated frame sent by each STA in an association process; The determining module is specifically configured to: according to link information between the first STA and the second STA, link information between the AP and each STA, location information of each STA, The local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication and the transmit power of the third STA.

3. 根据权利要求 2所述的 AP, 其特征在于，所述确定模块具体用于根据所述第一 STA和所述第二 STA之间的链路信息、所述第一 STA的本地噪声功率以及所述第二 STA 的本地噪声功率，确定所述直接链路通信的发送功率，根据所述直接链路通信的发送功率、所述第一 STA和所述第二 STA 之间的链路信息、所述 AP与所述每个 STA之间的链路信息、所述每个 STA 的位置信息、所述 AP的本地噪声功率、所述第一 STA的本地噪声功率以及所述第二 STA的本地噪声功率，确定所述第三 STA的发送功率。 The AP according to claim 2, wherein the determining module is specifically configured to: according to link information between the first STA and the second STA, local noise power of the first STA And determining, by the local noise power of the second STA, a transmit power of the direct link communication, according to a transmit power of the direct link communication, the first STA, and the second STA Link information between the link, link information between the AP and each STA, location information of each STA, local noise power of the AP, local noise power of the first STA, and The local noise power of the second STA determines the transmit power of the third STA.

4. 根据权利要求 2所述的 AP, 其特征在于，所述确定模块具体用于根据所述 AP与所述第三 STA之间的链路信息、所述 AP的本地噪声功率，确定所述第三 STA的发送功率，根据所述第三 STA的发送功率、所述第一 STA 和所述第二 STA之间的链路信息、所述 AP与所述每个 STA之间的链路信息、所述每个 STA的位置信息、所述 AP的本地噪声功率、所述第一 STA 的本地噪声功率以及所述第二 STA 的本地噪声功率，确定所述直接链路通信的发送功率。 The AP according to claim 2, wherein the determining module is specifically configured to determine, according to link information between the AP and the third STA, and local noise power of the AP, The transmit power of the third STA, according to the transmit power of the third STA, the link information between the first STA and the second STA, and the link information between the AP and each STA And determining, by the location information of each STA, the local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA, determining a transmit power of the direct link communication.

5. 根据权利要求 2至 4中任一项所述的 AP, 其特征在于，所述确定模块具体用于根据所述关联帧确定所述关联帧的接收信号功率，根据所述关联帧的接收信号功率和所述 AP的本地噪声功率确定所述关联帧的接收信号强度，根据所述关联帧的额定发送功率和所述关联帧的接收信号强度确定所述 AP与所述每个 STA之间的链路信息。 The AP according to any one of claims 2 to 4, wherein the determining module is specifically configured to determine, according to the associated frame, a received signal power of the associated frame, according to the receiving of the associated frame. Determining a received signal strength of the associated frame with a signal power and a local noise power of the AP, and determining between the AP and the STA according to a rated transmit power of the associated frame and a received signal strength of the associated frame Link information.

6. 一种站点 STA, 其特征在于，包括： A site STA, characterized in that it comprises:

发送模块，用于向接入点 AP发送所述 STA和第二 STA之间的直接链路通信的传输资源请求； a sending module, configured to send, to the access point AP, a transmission resource request for direct link communication between the STA and the second STA;

接收模块，用于接收所述 AP发送的第一调度信息，所述第一调度信息指示所述直接链路通信的传输资源和所述直接链路通信的发送功率，其中，所述直接链路通信的发送功率和第三 STA的发送功率由所述 AP确定，所述第三 STA 的传输资源与所述直接链路通信的传输资源重叠，所述直接链路通信的发送功率和所述第三 STA 的发送功率使所述直接链路通信和所述第三 STA的传输相互之间的干扰低于预定值； a receiving module, configured to receive first scheduling information that is sent by the AP, where the first scheduling information indicates a transmission resource of the direct link communication and a sending power of the direct link communication, where the direct link The transmission power of the communication and the transmission power of the third STA are determined by the AP, the transmission resource of the third STA overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the first The transmission power of the three STAs causes interference between the direct link communication and the transmission of the third STA to be lower than a predetermined value;

操作模块，用于在所述直接链路通信的传输资源上使用所述直接链路通信的发送功率与所述第二 STA进行直接链路通信。 And an operation module, configured to perform direct link communication with the second STA by using a transmit power of the direct link communication on a transmission resource of the direct link communication.

7. 根据权利要求 6所述的 STA, 其特征在于，所述直接链路通信的发送功率和所述第三 STA的发送功率由所述 AP根据所述 STA和所述第二 STA 之间的链路信息、所述 AP与所述 STA、所述第二 STA和所述第三 STA中的每个 STA之间的链路信息、所述每个 STA的位置信息、所述 AP的本地噪声功率、所述 STA的本地噪声功率以及所述第二 STA的本地噪声功率确定； The STA according to claim 6, wherein the transmission power of the direct link communication and the transmission power of the third STA are determined by the AP according to the STA and the second STA. Link information, link information between the AP and the STA, each of the second STA, and the third STA, location information of each STA, and local noise of the AP Power, local noise power of the STA, and local noise power of the second STA Set

所述发送模块还用于向所述 AP发送所述 STA的位置信息，在关联过程中向所述 AP发送关联帧以使所述 AP确定所述 AP与所述 STA之间的链路信息，以额定功率向所述第二 STA发送发现请求帧； The sending module is further configured to send the location information of the STA to the AP, and send an association frame to the AP in an association process, so that the AP determines link information between the AP and the STA, Sending a discovery request frame to the second STA at a rated power;

所述接收模块还用于接收所述第二 STA以额定功率发送的发现响应帧；所述 STA还包括： The receiving module is further configured to receive a discovery response frame that is sent by the second STA at a rated power; the STA further includes:

确定模块，用于确定所述 STA 的本地噪声功率，根据所述发现响应帧确定所述 STA和所述第二 STA之间的链路信息； a determining module, configured to determine a local noise power of the STA, and determining link information between the STA and the second STA according to the discovery response frame;

所述发送模块还用于向所述 AP发送所述 STA的本地噪声功率以及所述 STA和所述第二 STA之间的链路信息。 The sending module is further configured to send, to the AP, local noise power of the STA and link information between the STA and the second STA.

8. 根据权利要求 7所述的 STA, 其特征在于，所述确定模块具体用于根据所述发现响应帧确定所述发现响应帧的接收信号功率，根据所述发现响应帧的接收信号功率和所述 STA 的本地噪声功率确定所述发现响应帧的接收信号强度，根据所述发现响应帧的额定发送功率和所述发现响应帧的接收信号强度确定所述 STA和所述第二 STA之间的链路信息。 The STA according to claim 7, wherein the determining module is specifically configured to determine, according to the discovery response frame, a received signal power of the discovery response frame, according to a received signal power of the discovery response frame. The local noise power of the STA determines a received signal strength of the discovery response frame, and determines between the STA and the second STA according to a rated transmit power of the discovery response frame and a received signal strength of the discovery response frame. Link information.

9. 一种直接链路通信的方法，其特征在于，包括： A method of direct link communication, comprising:

接入点 AP接收第一站点 STA发送的所述第一 STA和第二 STA之间的直接链路通信的传输资源请求； The access point AP receives the transmission resource request of the direct link communication between the first STA and the second STA sent by the first station STA;

所述 AP根据所述传输资源请求，确定所述直接链路通信的传输资源；所述 AP确定所述直接链路通信的发送功率以及第三 STA的发送功率，其中，所述第三 STA 的传输资源与所述直接链路通信的传输资源重叠，所述直接链路通信的发送功率和所述第三 STA 的发送功率使所述直接链路通信和所述第三 STA的传输相互之间的干扰低于预定值； Determining, by the AP, the transmission resource of the direct link communication according to the transmission resource request; the AP determining the transmission power of the direct link communication and the transmission power of the third STA, where the third STA The transmission resource overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the transmission power of the third STA cause the direct link communication and the transmission of the third STA to mutually The interference is lower than the predetermined value;

所述 AP向所述第一 STA和所述第二 STA发送第一调度信息，所述第一调度信息指示所述直接链路通信的传输资源和所述直接链路通信的发送功率，并向所述第三 STA发送第二调度信息，所述第二调度信息指示所述第三 STA的发送功率和所述第三 STA的传输资源，以使所述第一 STA和所述第二 STA根据所述第一调度信息进行直接链路通信，所述第三 STA根据所述第二调度信息发送数据。 Transmitting, by the AP, first scheduling information to the first STA and the second STA, where the first scheduling information indicates a transmission resource of the direct link communication and a sending power of the direct link communication, and The third STA sends the second scheduling information, where the second scheduling information indicates the sending power of the third STA and the transmission resource of the third STA, so that the first STA and the second STA are The first scheduling information performs direct link communication, and the third STA sends data according to the second scheduling information.

10. 根据权利要求 9所述的方法，其特征在于，在所述 AP确定所述直接链路通信的发送功率以及第三 STA的发送功率之前，所述方法还包括：所述 AP确定所述 AP的本地噪声功率； The method according to claim 9, wherein before the AP determines the transmit power of the direct link communication and the transmit power of the third STA, the method further includes: Determining, by the AP, a local noise power of the AP;

所述 AP接收所述第一 STA、所述第二 STA和所述第三 STA中的每个 STA发送的所述每个 STA的位置信息； Receiving, by the AP, location information of each STA sent by each STA of the first STA, the second STA, and the third STA;

所述 AP根据所述每个 STA在关联过程中发送的关联帧，确定所述 AP 与所述每个 STA之间的链路信息； Determining link information between the AP and each STA according to the associated frame sent by each STA in the association process;

所述 AP接收所述第一 STA发送的所述第一 STA的本地噪声功率以及所述第一 STA和所述第二 STA之间的链路信息，接收所述第二 STA发送的所述第二 STA的本地噪声功率； Receiving, by the AP, the local noise power of the first STA and the link information between the first STA and the second STA, and receiving the The local noise power of the two STAs;

所述 AP确定所述直接链路通信的发送功率以及第三 STA的发送功率，包括： Determining, by the AP, the transmit power of the direct link communication and the transmit power of the third STA, including:

所述 AP根据所述第一 STA和所述第二 STA之间的链路信息、所述 AP 与所述每个 STA之间的链路信息、所述每个 STA的位置信息、所述 AP的本地噪声功率、所述第一 STA的本地噪声功率以及所述第二 STA的本地噪声功率，确定所述直接链路通信的发送功率以及第三 STA的发送功率。 The AP, according to the link information between the first STA and the second STA, the link information between the AP and the STA, the location information of each STA, and the AP The local noise power, the local noise power of the first STA, and the local noise power of the second STA determine the transmit power of the direct link communication and the transmit power of the third STA.

11. 根据权利要求 10所述的方法，其特征在于，所述 AP确定所述直接链路通信的发送功率以及第三 STA的发送功率，包括： The method according to claim 10, wherein the determining, by the AP, the transmit power of the direct link communication and the transmit power of the third STA, the method includes:

所述 AP根据所述第一 STA和所述第二 STA之间的链路信息、所述第一 STA的本地噪声功率以及所述第二 STA的本地噪声功率，确定所述直接链路通信的发送功率； Determining, by the AP, the direct link communication according to link information between the first STA and the second STA, local noise power of the first STA, and local noise power of the second STA Transmitting power

所述 AP根据所述直接链路通信的发送功率、所述第一 STA和所述第二 Transmitting power of the AP according to the direct link communication, the first STA, and the second

STA之间的链路信息、所述 AP与所述每个 STA之间的链路信息、所述每个 STA的位置信息、所述 AP的本地噪声功率、所述第一 STA的本地噪声功率以及所述第二 STA的本地噪声功率，确定所述第三 STA的发送功率。 Link information between STAs, link information between the AP and each STA, location information of each STA, local noise power of the AP, local noise power of the first STA And determining, by the local noise power of the second STA, a transmit power of the third STA.

12. 根据权利要求 10所述的方法，其特征在于，所述 AP确定所述直接链路通信的发送功率以及第三 STA的发送功率，包括： The method according to claim 10, wherein the determining, by the AP, the transmit power of the direct link communication and the transmit power of the third STA, the method includes:

所述 AP根据所述 AP与所述第三 STA之间的链路信息、所述 AP的本地噪声功率，确定所述第三 STA的发送功率； Determining, by the AP, the transmit power of the third STA according to the link information between the AP and the third STA, and the local noise power of the AP;

所述 AP根据所述第三 STA的发送功率、所述第一 STA和所述第二 STA 之间的链路信息、所述 AP与所述每个 STA之间的链路信息、所述每个 STA 的位置信息、所述 AP的本地噪声功率、所述第一 STA的本地噪声功率以及所述第二 STA的本地噪声功率，确定所述直接链路通信的发送功率。 The AP, according to the sending power of the third STA, the link information between the first STA and the second STA, and the link information between the AP and the STA, each of the foregoing The location information of the STAs, the local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA determine the transmission power of the direct link communication.

13. 根据权利要求 10至 12 中任一项所述的方法，其特征在于，所述 AP根据所述每个 STA在关联过程中发送的关联帧，确定所述 AP与所述每个 STA之间的链路信息，包括： The method according to any one of claims 10 to 12, wherein the AP determines the AP and each STA according to an associated frame sent by each STA in an association process. Link information between, including:

所述 AP根据所述关联帧，确定所述关联帧的接收信号功率； Determining, by the AP, the received signal power of the associated frame according to the associated frame;

所述 AP根据所述关联帧的接收信号功率和所述 AP的本地噪声功率，确定所述关联帧的接收信号强度； Determining, by the AP, a received signal strength of the associated frame according to a received signal power of the associated frame and a local noise power of the AP;

所述 AP根据所述关联帧的额定发送功率和所述关联帧的接收信号强度，确定所述 AP与所述每个 STA之间的链路信息。 The AP determines link information between the AP and each STA according to the rated transmit power of the associated frame and the received signal strength of the associated frame.

14. 一种直接链路通信的方法，其特征在于，包括： A method for direct link communication, comprising:

第一站点 STA向接入点 AP发送所述第一 STA和第二 STA之间的直接链路通信的传输资源请求； The first station STA sends a transmission resource request of the direct link communication between the first STA and the second STA to the access point AP;

所述第一 STA接收所述 AP发送的第一调度信息，所述第一调度信息指示所述直接链路通信的传输资源和所述直接链路通信的发送功率，其中，所述直接链路通信的发送功率和第三 STA的发送功率由所述 AP确定，所述第三 STA 的传输资源与所述直接链路通信的传输资源重叠，所述直接链路通信的发送功率和所述第三 STA 的发送功率使所述直接链路通信和所述第三 STA的传输相互之间的干扰低于预定值； Receiving, by the first STA, first scheduling information that is sent by the AP, where the first scheduling information indicates a transmission resource of the direct link communication and a transmission power of the direct link communication, where the direct link The transmission power of the communication and the transmission power of the third STA are determined by the AP, the transmission resource of the third STA overlaps with the transmission resource of the direct link communication, and the transmission power of the direct link communication and the first The transmission power of the three STAs causes interference between the direct link communication and the transmission of the third STA to be lower than a predetermined value;

所述第一 STA在所述直接链路通信的传输资源上使用所述直接链路通信的发送功率与所述第二 STA进行直接链路通信。 The first STA performs direct link communication with the second STA on the transmission resource of the direct link communication using the transmission power of the direct link communication.

15. 根据权利要求 14所述的方法，其特征在于，所述直接链路通信的发送功率和所述第三 STA的发送功率由所述 AP根据所述第一 STA和所述第二 STA之间的链路信息、所述 AP与所述第一 STA、所述第二 STA和所述第三 STA中的每个 STA之间的链路信息、所述每个 STA的位置信息、所述 AP的本地噪声功率、所述第一 STA的本地噪声功率以及所述第二 STA 的本地噪声功率确定； The method according to claim 14, wherein the transmit power of the direct link communication and the transmit power of the third STA are determined by the AP according to the first STA and the second STA Link information, link information between the AP and each of the first STA, the second STA, and the third STA, location information of each STA, The local noise power of the AP, the local noise power of the first STA, and the local noise power of the second STA are determined;

在所述第一站点 STA向接入点 AP发送所述第一 STA和第二 STA之间的直接链路通信的传输资源请求之前，所述方法还包括： Before the first site STA sends the transmission resource request of the direct link communication between the first STA and the second STA to the access point AP, the method further includes:

所述第一 STA向所述 AP发送所述第一 STA的位置信息； Sending, by the first STA, location information of the first STA to the AP;

所述第一 STA在关联过程中向所述 AP发送关联帧，以使所述 AP确定所述 AP与所述第一 STA之间的链路信息； The first STA sends an association frame to the AP in the association process, so that the AP determines link information between the AP and the first STA;

所述第一 STA确定所述第一 STA的本地噪声功率；所述第一 STA以额定功率向所述第二 STA发送发现请求帧，接收所述第二 STA以额定功率发送的发现响应帧； Determining, by the first STA, a local noise power of the first STA; Sending, by the first STA, a discovery request frame to the second STA at a rated power, and receiving a discovery response frame sent by the second STA at a rated power;

所述第一 STA根据所述发现响应帧，确定所述第一 STA和所述第二 STA 之间的链路信息； Determining, by the first STA, link information between the first STA and the second STA according to the discovery response frame;

所述第一 STA向所述 AP发送所述第一 STA的本地噪声功率以及所述第一 STA和所述第二 STA之间的链路信息。 The first STA sends the local noise power of the first STA and the link information between the first STA and the second STA to the AP.

16. 根据权利要求 15所述的方法，其特征在于，所述第一 STA根据所述发现响应帧，确定所述第一 STA和所述第二 STA之间的链路信息，包括：所述第一 STA根据所述发现响应帧，确定所述发现响应帧的接收信号功率； The method according to claim 15, wherein the determining, by the first STA, the link information between the first STA and the second STA according to the discovery response frame, Determining, by the first STA, a received signal power of the discovery response frame according to the discovery response frame;

所述第一 STA根据所述发现响应帧的接收信号功率和所述第一 STA的本地噪声功率，确定所述发现响应帧的接收信号强度； Determining, by the first STA, a received signal strength of the discovery response frame according to a received signal power of the discovery response frame and a local noise power of the first STA;

所述第一 STA根据所述发现响应帧的额定发送功率和所述发现响应帧的接收信号强度，确定所述第一 STA和所述第二 STA之间的链路信息。 And determining, by the first STA, link information between the first STA and the second STA according to a rated transmit power of the discovery response frame and a received signal strength of the discovery response frame.