WO2017161928A1 - 直连链路的建立方法及其实现数据传输的方法和节点 - Google Patents

直连链路的建立方法及其实现数据传输的方法和节点 Download PDF

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Publication number
WO2017161928A1
WO2017161928A1 PCT/CN2016/110315 CN2016110315W WO2017161928A1 WO 2017161928 A1 WO2017161928 A1 WO 2017161928A1 CN 2016110315 W CN2016110315 W CN 2016110315W WO 2017161928 A1 WO2017161928 A1 WO 2017161928A1
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Prior art keywords
node
direct connection
direct link
direct
control information
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PCT/CN2016/110315
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English (en)
French (fr)
Inventor
邢卫民
吕开颖
韩志强
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中兴通讯股份有限公司
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Priority to US16/087,258 priority Critical patent/US10701741B2/en
Publication of WO2017161928A1 publication Critical patent/WO2017161928A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/03—Reselecting a link using a direct mode connection
    • H04W36/037—Reselecting a link using a direct mode connection by reducing handover delay, e.g. latency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to, but is not limited to, a wireless local area network (WLAN) technology, and more particularly to a method for establishing a direct link and a method and a node for implementing data transmission.
  • WLAN wireless local area network
  • FIG. 1 is a schematic diagram of a basic architecture of a WLAN in the related art.
  • data is aggregated and distributed in the AP, that is, communication generally only occurs between the non-AP STA and the AP, and the relationship between the AP and the non-AP STA is similar to that of the base station and the terminal in the cellular network. relationship.
  • the AP in Figure 1 is the primary node associated with the non-AP STA.
  • APs, base stations, mesh networks (Mesh) sites, etc. are collectively referred to as primary nodes, non-AP STAs, terminals, etc. are collectively referred to as secondary nodes, and it is considered that the primary node and the secondary node are not peer-to-peer, but the primary node and the primary node
  • the node, the secondary node and the secondary node are peer-to-peer, ie peer-to-peer sites.
  • the communication requirements between peer stations have been increasing, and corresponding technologies have appeared in various technical fields. For example, in the WLAN, a direct channel of direct communication between non-AP STAs in the same BSS is proposed.
  • TDLS Transmission Direct Link Setup
  • DLS Direct Link Setup
  • DSS Direct Link Setup
  • AP sites can also communicate using technologies such as Mesh networks.
  • the technology under discussion includes the site supporting the new standard to add the BSS network identifier in the physical layer header of the transmitted new format radio frame ( Color bits), site identifier (STA ID), uplink/downlink indication (UL/DL flag), and spatial multiplexing parameters, pre-
  • the control information such as the transmission duration is controlled, so that the station that detects the radio frame can determine the subsequent radio frame load or the basic condition of the transmission according to the control information in advance, thereby determining the next operation.
  • This new format of radio frames is collectively referred to as HE (high efficiency) radio frames.
  • the Color bits information indicates the network identifier of the BSS, and the AP determines and notifies the associated information to the Color bits information.
  • All the stations carry the Color bits information in the transmitted radio frame, and the station can detect the The Color bits information indicated in the radio frame determines whether the radio frame belongs to its own associated BSS, and determines, according to the uplink and downlink indications, whether the radio frame is sent from the AP to the downlink (Downlink) of the station or from the station to the AP. Uplink.
  • the station determines that the radio frame is the associated BSS frame according to the Color bits information, and determines that it is not the receiver of the radio frame according to the subsequent indication, for example, the radio frame is indicated as an uplink frame and is sent to the AP, then the BSS is The non-AP station may choose not to receive the subsequent data payload, and does not contend for the channel to avoid interference with the ongoing transmission of the BSS; when the station determines, according to the Color bits information indication, that the radio frame does not belong to the associated BSS frame, then the station Spatial multiplexing may be performed according to information such as energy and interference level of the radio frame, thereby increasing transmission opportunities.
  • information such as the network identity of the BSS, uplink and downlink indications, etc. can help the BSS to utilize radio resources more efficiently.
  • the technology for carrying control information in the physical layer header of the HE radio frame effectively solves the problem of interference in data transmission in the infrastructure BSS.
  • the prior art considers a transmission efficiency improvement scheme between the AP and the non-AP STA. The impact of the direct link and transmission process established between the peer sites on the transmission of the infrastructure BSS is not considered, and the interaction between multiple direct links is not considered.
  • the embodiment of the invention provides a method for establishing a direct link and a method and a node for implementing data transmission, which can optimize the establishment and transmission process of the direct link and improve network efficiency.
  • the embodiment of the invention provides a method for establishing a direct link, which includes:
  • Establishing a direct link between the first node and the second node, and following a preset direct connection control letter Determine the policy and determine the direct connection control information corresponding to the established direct link.
  • the direct connection control information determining policy may be determined by negotiation between the first node and the second node; the establishing method may include:
  • the first node receives a direct link response frame from the second node, where the direct link response frame carries one or more direct connection control information available to the second node;
  • the first node sends a direct link acknowledgement frame to the second node, where the direct link acknowledgement frame carries the determined direct connection control information used by the direct link.
  • the establishing method may further include: determining, by the first node, the established direct connection according to one or more direct connection control information that is available to the first node, and one or more direct connection control information that is available to the second node. Direct connection control information used by the link.
  • the first node and the second node may be secondary nodes
  • the direct link request frame, the direct link response frame, and the direct link acknowledgement frame may all be transited by the primary node associated with the first node and the second node.
  • the first node and the second node may be secondary nodes; the establishing method may further include:
  • the first node sends a notification frame to its associated primary node, and includes any combination of the following information in the notification frame: the direct link establishment completion indication, the established direct connection identifier of the direct link, and the The service characteristics of the direct link transmission and the channel access mode of the direct link.
  • the establishing method may further include:
  • the first node receives a notification confirmation frame from the primary node, and includes at least one of the following information in the notification confirmation frame: a direct connection identifier assigned to the direct link, and a channel specifying the direct link Access mode and channel access parameters.
  • the direct connection control information determining policy may be: determining the direct connection control information used by the pre-configured direct link to the direct connection control information corresponding to the established direct link; the establishing method may include:
  • the direct connection control information used by the road is determined as the direct connection control information of the established direct link.
  • the first node and the second node may be secondary nodes;
  • the direct connection control information determining policy may be: establishing direct connection control information corresponding to the direct connection link as the first node and the first node
  • the direct connection control information determined by the primary node associated with the two nodes; the establishing method may include:
  • the direct connection control information may include at least one of the following: a direct connection identifier of the direct link, and a transmission direction value of the direct link.
  • the direct connection identifier may be a network identifier used by the direct link.
  • the transmission direction value of the direct link may be indicated as an uplink; when the first node and the second node are secondary nodes, The value of the transmission direction of the direct link may be indicated as downlink.
  • the establishing method may further include:
  • the first node or the second node or the master node checks the radio frame transmitted in the radio channel, determines the network identifier of the basic network architecture that the other network or the BSS has used, and determines that other direct links are occupied. Network identity.
  • the establishing method may further include:
  • the first node or the second node changes the direct connection identifier corresponding to the direct link according to the network condition.
  • the establishing method may further include:
  • the first node or the second node receives notification information from the primary node that carries measures for controlling the behavior of the site of the direct link.
  • the notification information may include at least one of the following information: whether the peer station is allowed to freely select the indication of the direct connection identifier; whether the peer station is required to notify the primary node of the direct link establishment status; the resource usage restriction of the direct link information.
  • the first node and the second node may be peer sites.
  • the establishing method may further include: the peer station transmitting the radio frame by using the established direct link, and carrying the direct connection control information in the radio frame.
  • the peer site can be a secondary node or a primary node.
  • the carrying the direct connection control information in the radio frame may include:
  • the peer station When the peer station sends a trigger frame to a plurality of other peer stations that establish a direct link to notify the peer to send the data to the peer station that initiates the trigger frame, the plurality of other peer sites that receive the trigger frame At least one of the return trigger format radio frames indicates the direct connection control information in a first signaling domain of the trigger format radio frame header.
  • the radio frame or the trigger format radio frame may be a high efficiency (HE) format radio frame.
  • HE high efficiency
  • the embodiment of the invention further discloses a method for realizing data transmission by using a direct link, which comprises: the peer station transmitting the radio frame by using the established direct link, and carrying the direct connection control information in the radio frame.
  • the peer site can be a secondary node or a primary node.
  • the carrying the direct connection control information in the radio frame may include:
  • the peer station transmits a multi-user format radio frame, and the first message in the radio frame header Instructing the direct connection control information in the field to indicate the identity of the target peer station of the one or more received radio frames in the second signaling domain of the radio frame header; or
  • the peer station When the peer station sends a trigger frame to a plurality of other peer stations that establish a direct link to notify the peer to send the data to the peer station that initiates the trigger frame, the plurality of other peer sites that receive the trigger frame At least one of the return trigger format radio frames indicates the direct connection control information in a first signaling domain of the trigger format radio frame header.
  • the radio frame or the trigger format radio frame may be an HE format radio frame.
  • the direct connection control information may include at least one of the following: a direct connection identifier of the direct link, and a transmission direction value of the direct link.
  • the direct connection identifier may be a network identifier used by the direct link.
  • the transmission direction value of the direct link may be indicated as an uplink; when the peer site is a secondary node, the transmission direction value of the direct link may be indicated as Downstream.
  • the embodiment of the invention further discloses a node, which at least comprises an establishing module and a determining module; wherein
  • the determining module is configured to determine a policy according to the preset direct connection control information, and determine the direct connection control information corresponding to the established direct link.
  • the node may further include: a transmission module configured to transmit the radio frame with the established direct link and carry the direct connection control information in the radio frame.
  • the determining module may be configured to notify the establishing module when the direct connection control information determining policy is determined by peer-to-peer negotiation;
  • the establishing module may be configured to: negotiate the direct connection control information in a process of establishing a direct link with a node whose own node is a peer station.
  • the establishing module may be configured to: send a direct link request frame to a node that is a peer station with the node where the node is located, where the direct link request frame carries one or more direct connection control information available to the node where the node is located; Receiving a direct link response frame from a node that is a peer station with its own node, the direct link response frame carrying one or more available to the node whose peer node is the peer site The direct connection control information is sent to the node that is the peer station with the node where the node is located, and the direct link confirmation frame carries the direct connection control information of the determined direct link.
  • the direct link request frame, the direct link response frame, and the direct link acknowledgement frame may pass through the node
  • the associated primary node performs the transfer.
  • the transmission module may be further configured to: send a notification frame to the primary node associated with the node where the node is located, and include any combination of the following information in the notification frame: a direct link establishment completion indication, and a direct connection of the established direct link. Identification, service characteristics of direct link transmission, and channel access mode of direct link.
  • the transmission module may be further configured to: receive a notification confirmation frame from the primary node associated with the node where the node is located, and include at least one of the following information in the notification confirmation frame: a direct connection identifier assigned to the direct link, and a designated location
  • a notification confirmation frame from the primary node associated with the node where the node is located, and include at least one of the following information in the notification confirmation frame: a direct connection identifier assigned to the direct link, and a designated location.
  • the determining module may be further configured to: after the direct link is established, change the directly connected identifier of the directly connected control information corresponding to the directly connected link according to the network condition.
  • the determining module may be configured to:
  • the direct connection control information used by the pre-configured direct link is determined as the direct connection control information corresponding to the established direct link.
  • the direct connection control information determining policy is the direct connection control information corresponding to the established direct link
  • the direct connection control determined by the master node is When determining information, the determination module can be configured to:
  • the direct connection control information from the master node associated with the node in which it is located is determined as the direct connection control information corresponding to the established direct link.
  • the direct connection control information from the primary node associated with the node in which the node is located may include: the primary node broadcasts a direct connection identifier, or the primary node allocates a direct connection identifier, or the network identifier of the primary node according to the basic network architecture. Or the device identifier of the master node itself determines a direct connection identifier in the direct connection control information.
  • the determining module may be further configured to: check a radio frame transmitted in the wireless channel, Determine the network identity of the underlying network architecture that other networks or BSSs have used, and determine the network identity that other direct links have occupied.
  • the determining module can also be configured to:
  • the notification information of the measure carrying the behavior of the site for controlling the direct link is received from the master node associated with the node in which it is located.
  • the notification information may include at least one of the following information: whether the peer station is allowed to freely select an indication of the direct connection identifier; whether the peer station is required to notify the master node of the indication of the direct link establishment condition; Resource usage restriction information for the link.
  • the transmission module can be configured to:
  • the direct connection control information is indicated in the first signaling domain of the radio frame header;
  • the node where the transmission module itself is transmitting is a multi-user format radio frame, indicating the direct connection control information in the first signaling domain of the radio frame header, indicating in the second signaling domain of the radio frame header The identity of one or more target peer sites that receive the wireless frame;
  • the node where the transmission module itself sends a trigger frame to other peer stations that establish a direct link to notify it to send data to the peer site that initiates the trigger frame
  • multiple other peer sites that receive the trigger frame At least one of the instructions returns a trigger format radio frame, and the direct connection control information is indicated in a first signaling field of the trigger format radio frame header.
  • the radio frame or the trigger format radio frame may be an HE format radio frame.
  • the embodiment of the invention further discloses a node, which at least comprises a transmission module, configured to transmit a radio frame by using the established direct link, and carry direct connection control information in the radio frame.
  • a transmission module configured to transmit a radio frame by using the established direct link, and carry direct connection control information in the radio frame.
  • the node can be a secondary node or a primary node.
  • the transmission module can be configured to:
  • the direct connection control information is indicated in the first signaling domain of the radio frame header;
  • the direct connection control information is indicated in a first signaling domain of a radio frame header, and is referred to in a second signaling domain of a radio frame header.
  • the node where the transmission module itself sends a trigger frame to other peer stations that establish a direct link to notify it to send data to the peer site that initiates the trigger frame
  • multiple other peer sites that receive the trigger frame At least one of the instructions returns a trigger format radio frame, and the direct connection control information is indicated in a first signaling field of the trigger format radio frame header.
  • the radio frame or the trigger format radio frame may be an HE format radio frame.
  • the direct connection control information may include at least one of the following: a direct connection identifier of the direct link, and a transmission direction value of the direct link.
  • the direct connection identifier may be a network identifier used by the direct link.
  • the transmission direction value of the direct link may be indicated as an uplink
  • the transmission direction value of the direct link may be indicated as a downlink.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented by the processor to implement the method for establishing the direct link.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented by the processor to implement the method for realizing data transmission by the direct link.
  • the method for establishing a direct link includes: establishing a direct link between the first node and the second node, and determining a policy according to the preset direct connection control information, and determining the corresponding direct link connection.
  • Direct connection control information The method of the present application optimizes the establishment and transmission process of the direct link by determining a direct connection control information for identifying the direct link for the direct link, so that the direct link is well distinguished from The link to the underlying network architecture increases network efficiency.
  • the direct connection control information determining policy may include, but is not limited to, a negotiation determination between the first node and the second node; or determining the direct connection control information used by setting the direct link in advance as The direct connection control information corresponding to the direct link is established; or, when the first node and the second node are secondary nodes, the direct connection control information corresponding to the established direct link is directly connected by the primary node.
  • the control information for example, the primary node broadcasts the direct connection identifier, or the primary node allocates the direct connection identifier, or the master node determines the direct connection identifier according to the network identifier of the basic network architecture, and the like.
  • FIG. 1 is a schematic diagram of a basic architecture of a WLAN in a related art
  • FIG. 2 is a flowchart of a method for establishing a direct link according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a link established under the same BBS according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a link established under different BBSs according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an embodiment of a HE radio frame format in a single-user format radio frame according to the present application
  • FIG. 6 is a schematic diagram of an embodiment of a HE radio frame format in a multi-user format radio frame according to the present application
  • FIG. 7 is a schematic diagram of an embodiment of a HE radio frame format in a trigger format radio frame according to the present application.
  • FIG. 8 is a schematic structural diagram of a structure of a node according to an embodiment of the present invention.
  • the method for establishing a direct link includes: establishing a direct link between the first node and the second node, and determining a policy according to the preset direct connection control information, and determining the established direct link Corresponding direct connection control information.
  • the direct connection control information determining policy may include but is not limited to:
  • the direct connection control corresponding to the established direct link is established.
  • the information is the direct connection control information determined by the master node, for example, the primary node broadcasts the direct connection identifier, or the primary node allocates the direct connection identifier, or the master node determines the direct connection identifier according to the network identifier of the basic network architecture, and the like.
  • the method of the embodiment of the present invention optimizes the establishment and transmission process of the direct link by optimizing the direct connection control information for identifying the direct link for the direct link, so that the direct link is good. Increases network efficiency by linking to links to the underlying network architecture.
  • the method for establishing a direct link includes:
  • Step 200 The first node sends a direct link request frame to the second node, where the direct link request frame indicates one or more direct connection control information available to the first node.
  • the first node and the second node are peer sites and belong to the same network or BSS.
  • the direct connection control information includes at least one of the following: a direct connection identifier of the direct link, and a transmission direction value.
  • the direct connection identifier is a network identifier used by the direct link, such as a color value.
  • the transmission direction value of the direct link may be indicated as uplink; when the peer site is the secondary node, the direct link transmission is performed.
  • the direction value can be indicated as down.
  • Step 201 The first node receives a direct link response frame from the second node, where the direct link response frame indicates one or more direct connection control information available to the second node.
  • Step 202 The first node sends a direct link acknowledgement frame to the second node, where the directly connected link acknowledgement frame indicates the direct connection control information used by the determined direct link.
  • the first node determines the straightness established between the first node and the second node according to one or more direct connection control information that is available to the first node and one or more direct connection control information that is available to the second node returned by the second node. Direct connection control information used by the link.
  • the direct connection control information used by the direct link established between the first node and the second node may be determined by the following policies:
  • the first site selects one of the set available to itself or the set available to the second node as the determined direct connection control information; or
  • the set of direct control information returned by the second node may also be defined as a subset of the available sets sent by the first station, such that the first station selects any one of the available sets returned from the second site as the determined direct connection control.
  • Information can be; and so on.
  • the direct link request frame, the direct link response frame, and the direct link acknowledgement frame may be associated by the first node and the second node.
  • the master node performs the transfer.
  • the method for establishing the direct link shown in FIG. 2 may further include:
  • the first node sends a notification frame to its associated primary node, and includes at least one of the following information in the notification frame: a direct link establishment completion indication, a direct connection identifier of the established direct link, and a direct link transmission service. Characteristics, channel access mode of direct link, etc.
  • the service characteristics of the direct link transmission may include information such as a rate of the direct link, a service specification, and a resource to be occupied.
  • the channel access mode of the direct link may indicate that the first site and the second site occupy resources.
  • the method may be, for example, a contention-based channel access method, or a scheduling-based channel access method, or a resource allocated by the master node, or a combination of the two.
  • the master node learns about the direct link established between the secondary nodes associated with it.
  • the primary node may further send a notification acknowledgement frame to the first node, and include at least one of the following information in the notification acknowledgement frame: assigning the direct link Direct connection identifier, channel access mode and channel access parameters of the specified direct link. In this way, the communication between the stations controlling the direct link by the master node is realized, and the transmission of the infrastructure and the transmission of the direct link are better avoided.
  • the direct connection identifier allocated to the direct link in the notification acknowledgement frame may be different from the direct connection identifier of the established direct link carried in the notification frame.
  • the site reporting identifier is A
  • the AP may indicate that B.
  • the channel access mode of the specified direct link in the notification acknowledgement frame may be at least the following One: competition mode, scheduling method. For example, it is assumed that the access mode that the secondary node indicates to the AP is a free-competing channel. However, the AP can indicate that the secondary node is a scheduled access mode, that is, the manner in which the AP allocates resources to the directly connected link without allowing the site to compete freely. Access. Since the master node knows the load of the entire network, it is reasonable for the master node to determine the final access mode. For example, if the network load is heavy, the competition of the secondary nodes can be restricted. If the network load is light, the secondary node can be allowed. Free competition and so on.
  • competition mode scheduling method. For example, it is assumed that the access mode that the secondary node indicates to the AP is a free-competing channel. However, the AP can indicate that the secondary node is a scheduled access mode, that is, the manner in which the AP allocates resources to the directly connected link without
  • the peer station may also change the direct connection identifier (such as the color value) corresponding to the direct link according to the network condition (such as load condition, etc.), the process of changing, and the establishment process. Similar, no more details here.
  • the direct connection control information of the direct link is determined through negotiation.
  • the following manner may also be used to determine the direct connection control information of the direct link.
  • the direct connection control information determining policy is: determining the direct connection control information used by the pre-configured direct link to the directly connected control information corresponding to the established direct link.
  • the direct connection control information used by the direct link is set in advance, so that the direct connection control information of the first node and the second node is directly established, and the directly connected direct control information is directly determined as the established straight line.
  • the direct connection control information of the link can be. That is to say, this method distinguishes different transmissions (that is, the transmission of the direct link and the transmission of the basic network architecture) through the directly connected direct control information of the directly connected link.
  • the first node and the second node are peer sites, and the first node and the second node may belong to the same network or BSS.
  • the direct connection control information includes at least one of the following: a direct connection identifier of the direct link, and a transmission direction value.
  • the direct connection identifier is a network identifier used by the direct link, such as a color value.
  • the transmission direction value of the direct link may be indicated as uplink; when the peer station is the secondary node, the transmission direction value of the direct link may be indicated as downlink.
  • the direct connection control information determining policy is: the direct connection control information corresponding to the established direct link is the direct connection control information determined by the master node. After the direct link between the first node and the second node is established, the following method may be used to determine the direct connection control information of the direct link:
  • the master node broadcasts a direct connection identifier: the master node notifies one or more lines that are specifically assigned to the direct link.
  • the identifier such as the network identifier color value, is such that if all the secondary nodes in the BSS to which the master node belongs establish a direct link, the direct connection identifier is one of one or more network identifiers broadcast by the master node, where Selecting a direct connection identifier broadcasted by the master node in a randomly selected manner; or selecting, by the secondary node to detect the radio frame of the channel, the directly connected identifier that is less appearing as the identifier of the direct link, and the direct connection identifier is There is no direct connection identifier with less conflicts or conflicts; further, the primary node may also update the network identifier assigned to the direct link according to network conditions such as load conditions; or
  • the primary node assigns the directly established link to the current connection (equivalent to unicast configuration, that is, a direct connection identifier is configured for a direct connection pair).
  • the direct connection identifier is obtained by the master node (if the directly established link is received)
  • the notification of the first node is completed by the direct link establishment, and the direct connection identifier is directly allocated to the currently established direct link and notified to the first node and the second node that establish the direct link; or
  • the master node determines the direct connection identifier according to the network identifier of the basic network architecture or the device identifier of the master node, and notifies the first node and the second node that connect the currently established direct link.
  • the determining the direct connection identifier according to the network identifier of the basic network architecture or the device identifier of the primary node includes: the direct connection identifier of the direct link established in the BSS is equal to the network identifier of the basic network architecture; or the direct connection identifier is the basic network.
  • the network identifier of the architecture plus a value obtained by setting a specific value in advance; or, the direct connection identifier is a value obtained by the operation of the network identifier of the basic network architecture, wherein the operation may be, for example, subtraction, exclusive OR, or modulo Common operations or any combination of these operations.
  • the secondary node that establishes the direct link does not obtain the network identifier of the basic network architecture from the primary node of the network or the BSS (if the primary node is a legacy site, there is no such capability, that is, the infrastructure network has no network.
  • the direct connection identifier may be a value of the preset reservation.
  • the method for establishing the embodiment may further include:
  • the peer station ie, the first node or the second node or the master node checks the radio frame transmitted in the radio channel (ie, checks the control information or network identifier carried by the radio frame transmitted in the radio channel, such as checking the radio frame.
  • the first signaling domain in the physical layer header to determine which network identifiers are being used by other networks or links determine the network identity of the underlying network architecture that other networks or BSSs have used, and determine other straight around The network identifier occupied by the link; thus, when the direct connection control information is negotiated between the subsequent first node and the second node, or the primary node broadcasts or allocates the direct connection control information, it may select different from the occupied network identifiers.
  • the value is used as the direct connection identifier of the currently established direct link.
  • the establishing method further includes: the peer station may also change the network identifier used by the direct link according to the change of the surrounding network environment.
  • the air interface of other stations can be detected through the air interface to determine the network identity or the direct connection identifier conflict. If the conflict is serious (such as the received direct connection identifier and the same radio frame), you can choose to change other direct connection identifiers. avoid conflict.
  • the process of changing the direct connection identifier is similar to the process of determining the direct connection identifier. For example, if the first node determines that there is a conflict, the first node sends a handover direct connection identifier request frame carrying the changed direct connection identifier to the first node. The second node sends a handover response frame to the first node, and the first node finally sends an acknowledgement frame to complete the change process of the direct connection identifier.
  • the master node may further select some measures to control the behavior of the directly connected link site.
  • the primary node associated with the peer site sends notification information to the peer site, and the notification information may include at least one of the following information:
  • the peer station can freely select the indication of the direct connection identifier, thus limiting the situation in which the color value of the peer-to-peer direct link is freely used, for example, if not allowed, the color value selected when establishing the direct link It can only be the color value corresponding to the infrastructure network or the reserved value preset; if allowed, the peer station can negotiate the method to determine the color value of the direct link as shown in Figure 2.
  • the peer station is required to notify the primary node of the indication of the establishment of the direct link, so if the request is made, the direct link is established after the peer station establishes the direct link and determines the direct connection control information.
  • the information (such as the direct link establishment completion indication, the direct connection identifier of the established direct link, the service feature of the direct link transmission, and the channel access mode of the direct link) are reported to the master node;
  • the resource usage restriction information of the direct link may be, for example, the transmission resource of the direct link may be restricted to the resource indicated by the primary node, and the resource access parameter or the channel access mode indicated by the primary node may be used to obtain the transmission opportunity.
  • the embodiment of the present invention further provides a method for implementing data transmission by using a direct link, including: the peer station transmitting the radio frame by using the established direct link, and carrying the direct connection control information in the radio frame.
  • the method for implementing data transmission by using the direct link may be based on the method for establishing a direct link according to the embodiment of the present invention, or how to establish a direct link without defining how to directly connect.
  • the link is established and the direct connection control information of the established direct link is determined.
  • the direct connection control information includes at least one of the following: a direct connection identifier of the direct link, and a transmission direction value.
  • the direct connection identifier may be a network identifier used by the direct link, such as a color value.
  • the transmission direction value of the direct link may be indicated as uplink; when the peer station is the secondary node, the transmission direction value of the direct link may be indicated as downlink.
  • the carrying the direct connection control information in the radio frame includes:
  • the direct connection control information is indicated in the first signaling domain of the radio frame header; in some implementation manners, in order to improve the reliability of the first signaling domain, two Repeating the first signaling domain by one or more first signaling domains;
  • the peer station transmits a multi-user format radio frame, indicating direct connection control information in a first signaling domain of the radio frame header, and indicating one or more receiving radios in a second signaling domain of the radio frame header The identity of the target peer site of the frame;
  • At least one of a plurality of other peer sites that received the trigger frame is received if the peer station sends a trigger frame to a plurality of other peer sites that establish a direct link to notify them of transmitting data to the peer site that initiated the trigger frame
  • the trigger format radio frame is returned, and the direct connection control information is indicated in the first signaling domain of the trigger format radio frame header.
  • the radio frame or the trigger format radio frame is an HE format radio frame, and may also include a legacy training domain and a legacy signaling domain for backward compatibility with the conventional WLAN device, and repeat the conventional signaling domain to determine the radio frame adoption.
  • HE frame format is an HE format radio frame, and may also include a legacy training domain and a legacy signaling domain for backward compatibility with the conventional WLAN device, and repeat the conventional signaling domain to determine the radio frame adoption.
  • FIG. 3 is a schematic diagram of a link established under the same BBS according to an embodiment of the present invention, as shown in FIG. Lines represent links in the underlying network architecture, and thin solid lines indicate direct links.
  • the primary node associated with STA1 to STA10 is an AP.
  • the AP and the multiple sites form a BSS
  • the AP sends a broadcast frame to notify all STAs that the network identifier color of the basic network architecture has a value of 3, and is sent to the AP at the STA.
  • the radio frame set the color field in the radio frame physical layer header signaling domain to 3, and set the uplink/downlink flag (UL/DL flag) to uplink, and the AP sends the radio frame to the STA.
  • the color field in the radio frame physical layer header header signaling field is set to 3, and the UL/DL flag is set to downlink.
  • STA1 to STA3 support a direct connection technology, such as TDSL or DSL, and assume that STA1 is the initiator, that is, the first node establishes a tunnel direct link with STA2 and STA3, and the establishment process includes:
  • the STA1 transmits the direct link request frame to the STA2 through the transparent transmission of the AP. If the STA2 agrees to establish the TDLS, the STA transparently forwards the direct link response frame to the STA1. Finally, the STA1 transparently forwards the link to the STA2 through the AP transparently. In this way, the direct link between STA1 and STA2 is established. In the same process, STA1 and STA3 also establish a direct link. The details of the established link are shown in Figure 3.
  • the transparent tunneling of the AP means that STA1 to STA3 use the basic network architecture to send frames required for establishing links through the APs. STA1 to STA3 encapsulate these frames.
  • these frames are not different from ordinary data frames.
  • the AP will transfer these direct connection management frames as if the normal data frames were transferred. That is to say, the AP does not know and is transparent in the process of establishing a direct link at the site.
  • each STA to the AP's infrastructure is uplinked, and the AP transmits to each STA's infrastructure, and the STAs with direct links are established. Connected.
  • the color field in the physical layer header signaling domain of the radio frame transmitted by the direct link is set to a preset special value of 0, that is, 0 represents a direct connection identifier, and the uplink is simultaneously performed. / Downstream flag is set to Down.
  • the station receives the radio frame and detects the physical layer header, it can determine the transmission type of the radio frame. such as:
  • STA1 to STA3 in FIG. 3 are both the peer station of the direct link and the STA of the link of the basic network architecture established by the AP.
  • STA1 to STA3 receive a color value of 0, uplink/downlink
  • the radio frame When the radio frame is set to the downlink radio frame, it can be determined that the radio frame is transmitted on the direct link. Therefore, the user may be the receiver and needs to continue to receive the radio frame.
  • STA1 to STA3 receive the color value of 3
  • uplink/ When the downlink flag is set to the downlink radio frame the radio frame may be determined to be the downlink frame sent by the AP associated with the radio frame. Therefore, the radio frame may be the receiver and needs to continue to receive the radio frame.
  • the STA1 to STA3 receive the color value, 3.
  • the uplink/downlink flag is set to the uplink radio frame, it can be determined that the radio frame is sent to the AP by other STAs. Therefore, it is impossible for the receiver to be the receiver, and the
  • STA4 to STA10 in Figure 3 they do not have a direct link, but are STAs under the link of the basic network architecture established by the AP.
  • STA4 to STA10 receive the color value of 0 and the uplink/downlink flag is set to the downlink.
  • the radio frame may be determined to be the downlink frame sent by the AP associated with the radio frame. Therefore, the receiver may continue to receive the radio frame.
  • the AP in Figure 3 only the radio frame with the color value of 3 and the uplink/downlink flag set to the uplink is determined to be sent by the STA to the STA. At this time, the AP continues to receive. In other cases, the AP may choose not to receive.
  • FIG. 4 is a schematic diagram of a link established under different BBSs according to an embodiment of the present invention.
  • a thick solid line indicates a link in an infrastructure of a basic network
  • a thin solid line indicates a direct link between the secondary nodes
  • a thin dotted line Indicates a direct link between the primary nodes.
  • the primary node associated with STA1 to STA5 is AP1
  • the primary node associated with STA6 to STA10 is AP2.
  • AP1 and a plurality of stations STA1 to STA5 form BSS1
  • AP2 and a plurality of stations STA6 to STA10 constitute BSS2
  • the network identifier color of BSS1 has a value of 3
  • the network identifier color of BSS2 has a value of 5 .
  • STA1 and STA2 support TDLS and are in the same BSS. It is assumed that STA1 and STA2 establish a direct link, and STA1 and STA2 are peer nodes. It is assumed that AP1 and AP2 also establish a direct link. Road, but this is a direct link between the master nodes, which can be A link in the form of a mesh may also be a direct link similar to an AP cluster.
  • the secondary node in this embodiment
  • the color field of the physical layer header of the radio frame transmitted by the direct link is set to a special value of 0, and the uplink/downlink flag is uniformly set to the downlink; the physical of the radio frame transmitted by the primary node directly connected to the link
  • the color field in the layer header header signaling field is set to a special value of 0, and the uplink/downlink flag is uniformly set to the uplink. In this way, the uplink/downlink indication field can be used to distinguish the radio frames transmitted by different links.
  • the radio frame may be selected not to be received.
  • the transmission between different BSSs can be distinguished by the value of the color field. For example, when STA1 receives the radio frame and detects that the color value is 5, it can be determined that the radio frame has nothing to do with itself, so that it can choose not to continue receiving.
  • the AP and the plurality of stations STA1 to STA10 form one BSS, and it is assumed that the AP sends a broadcast frame, and the value of the identifier color of all STA networks is notified to be 3.
  • STA1 to STA3 support direct connection technologies such as TDSL or DSL.
  • STA1 is the initiator, that is, the first node performs tunnel direct link establishment with STA2 and STA3 respectively.
  • the assumption is made.
  • the color value corresponding to the direct link is negotiated and can include:
  • the STA1 transmits the direct link request frame to the STA2 through the transparent transmission link of the AP, and carries one or more color values available to the STA1 in the direct link request frame. If the STA2 agrees to establish a direct link, the STA transparently transits through the AP. The direct link response frame is sent to STA1, and the direct link response frame carries one or more color values available to STA2. Finally, STA1 transparently forwards the link confirmation frame to STA2 through the AP transparently, and is in the direct link. The acknowledgment frame carries the determined color values of the directly connected links of STA1 and STA2, so that the direct link between STA1 and STA2 is established. Using the same procedure, the color value used between STA1 and STA3 can also be negotiated. This value can be the same as or different from the color value of the link between STA1 and STA2.
  • the schematic diagram of the established link can be seen in Figure 3.
  • the peer station can also change the color value of the direct link according to the change of the network status (such as load status) to avoid conflicts with the color values of other directly connected links.
  • the problem, the process of the change, and the process of the establishment are similar to those of the above-mentioned establishment process of the embodiment of the present invention, which are easily implemented by those skilled in the art, and are not described herein again.
  • the peer node (such as STA1 and STA2 in this embodiment) completes the direct link.
  • a notification frame can be sent to the associated AP.
  • STA1 sends a notification frame to the AP.
  • the notification frame in this embodiment is used for In the case of notifying the directly connected link established by the AP, the notification frame may include a direct link establishment completion indication, a direct connection identifier used by the established direct link, a service characteristic of the direct link transmission, and a direct link. Information such as channel access methods.
  • the service characteristics of the direct link transmission may include the information of the rate of the direct link, the service specification, and the resource to be occupied.
  • the channel access mode of the direct link may indicate the manner in which the STA1 and the STA2 occupy resources. It is a contention-based channel access method, or a scheduling-based channel access method, or a resource allocation by an AP, or a combination of the two. By receiving the notification frame, the AP knows the situation of the direct link.
  • the AP may also reply a notification confirmation frame to the peer node, and may include one of the following information in the notification confirmation frame: a direct connection identifier assigned to the direct link, and a direct connection. Channel access mode and channel access parameters of the link. In this way, the communication between the stations controlling the direct link by the master node is realized, and the transmission of the infrastructure and the transmission of the direct link are better avoided.
  • the fourth embodiment further illustrates that, in addition to the methods for determining the direct connection identifier in the first embodiment, the second embodiment, and the third embodiment, the method for determining the direct connection identifier by the secondary node may also adopt the manner of the fourth embodiment.
  • the AP and the multiple stations STA1 to STA10 form one BSS, and it is assumed that the AP sends a broadcast frame, and the network identifier color of all the STAs of the basic network architecture is notified to be 3.
  • STA1 to STA3 support direct connection technologies such as TDSL or DSL, and it is assumed that STA1 acts as an initiator to establish a tunnel direct link with STA2 and STA3.
  • the method for determining the identifier corresponding to the direct link between STA1 and STA3 may be:
  • the AP broadcasts the direct connection identifier, that is, the AP notifies one or more directly connected identifiers, such as the network identifier color value, which are specifically assigned to the direct link. Therefore, if all the STAs in the BSS establish a direct link, the direct connection identifier must be One of one or more color values broadcast for the AP. Further, the AP may also update the network identifier assigned to the direct link according to the network condition.
  • the AP allocates a direct connection identifier to the currently established direct link, that is, the AP notifies the direct connection identifier (such as the network identifier color value) that is specifically allocated to the direct link to a pair of sites where the BSS establishes a direct link. For example, the AP notifies STA1 and STA2 of the specially assigned color value 0 as two.
  • the direct connection identifier of the direct link established between the parties.
  • the specific process may be: the peer station of the direct link, such as STA1, sends the notification information of the direct link to the associated AP, and the AP allocates an identifier to the direct link according to the direct link notification information, where the notification
  • the information may be carried in the notification frame sent to the AP, and may include any combination of the following information: a direct link establishment completion indication, a service characteristic of a direct link transmission, and a channel access mode of a direct link.
  • the direct connection identifier is a specific value obtained by the operation of the network identifier color value of the basic network architecture.
  • the identifier of the direct link established in the BSS is equal to the identifier of the basic network architecture; for example, the direct connection identifier is a value obtained by adding the network identifier color value of the basic network architecture to a preset specific value;
  • the direct connection identifier is a value obtained by combining the operation value or the operation mode of the network identifier color value of the basic network architecture, wherein the operation may be a common operation such as subtraction, exclusive OR, modulo, or any combination of these operations.
  • the direct connection identifier may be a preset reserved network identifier color special value.
  • the method for establishing the embodiment may further include: before the peer site determines the direct connection identifier, the method for establishing the direct connection identifier is not used in the embodiment of the present invention.
  • the peer site can also change the network identifier color value used by the direct link according to changes in the surrounding network environment.
  • the air frame of other stations can be detected through the air interface to determine the network identity or the direct connection identifier conflict. If the conflict is serious (such as the received direct connection identifier and the same radio frame), you can choose to change other identifiers to avoid conflicts. .
  • the AP may select some measures to control the behavior of the direct link site.
  • the AP may limit the STA to directly use the color value, wherein the AP may send a notification frame, such as a beacon frame, to the STA, and indicate in the notification frame whether to allow free connection between the directly connected sites.
  • the color value used if the AP indicates no permission in the notification frame, then The color value selected by the STA when establishing a direct link link can only be the color value corresponding to the basic network architecture, or a special reserved value such as a value of 0; if the AP indicates permission in the notification frame, the STA can use The color value determined by the negotiation process itself.
  • the AP may also indicate in the Beacon frame that the secondary node in the network cannot establish a direct link.
  • the AP allows a direct link between the secondary nodes in the network, but after the establishment of the direct link is completed in the Beacon frame, the peer station must notify the direct link of the service characteristics of the AP directly connected link. Establish a situation.
  • the AP may also directly notify the resource usage restriction information of the direct link. For example, the transmission resource of the direct link may be restricted to be performed on the resource indicated by the AP, and the resource access parameter or channel access mode indicated by the AP may be used. Transmission opportunities, etc.
  • the method for implementing the data transmission by the direct link includes: the peer station uses the established direct link
  • the radio frame is transmitted, and the direct connection control information is carried in the radio frame.
  • the radio frame may be an HE radio frame.
  • FIG. 5 is a schematic diagram of an embodiment of a single-user format radio frame HE radio frame format according to an embodiment of the present invention, where the radio frame header is first.
  • the direct connection control information is indicated in the signaling domain (ie, signaling domain A).
  • two or more first signaling domains ie, signaling domain A may be set, that is, repeated A signaling domain (ie, signaling domain A).
  • FIG. 6 is a schematic diagram of an embodiment of a HE radio frame format in a multi-user format radio frame according to an embodiment of the present invention, where the radio frame header is first. Directing control information is indicated in the signaling domain (ie, signaling domain A), indicating one or more target peer sites receiving the radio frame in the second signaling domain of the radio frame header (ie, signaling domain B) logo.
  • FIG. 7 is a schematic diagram of an embodiment of a HE radio frame format in a trigger format radio frame according to an embodiment of the present invention, similar to a single-user format radio frame, in a trigger format radio frame header.
  • the direct connection control information is indicated in the first signaling domain (ie, signaling domain A).
  • the above HE format radio frame as shown in FIG. 5 to FIG. 7, further includes a legacy training domain and a conventional signaling domain for backward compatibility with the conventional WLAN device, and by repeating the conventional signaling domain It is determined that the radio frame adopts the HE frame format.
  • the AP and the multiple stations STA1 to STA10 form a BSS
  • STA1 and STA2, STA1 and STA3 respectively establish a direct link
  • the color value of the basic network architecture is 3, in order to distinguish
  • the color value of the direct link is 0.
  • the color value in the physical layer header signal field in the radio frame is set to 0, and the color field in the first signaling domain (ie, signaling domain A) of the physical layer frame header is set to 0, and the UL/DL domain (not shown in FIG. 5) in the signaling domain A is set to downlink.
  • the same is true for the radio frame that STA2 or STA3 sends to STA1.
  • the color value in the physical layer header signal domain in the radio frame is set to 0.
  • the second signaling domain (ie, signaling domain B) carries the identifiers of STA2 and STA3, and the transmission parameters and resource locations sent to the STA2 and STA3 data.
  • the peer station can also send a user's data using the multi-user radio frame format.
  • STA2 uses the multi-user radio frame format to transmit data to STA1, so that the radio frame can carry the signaling domain B, and the signaling domain B indicates that the receiver is STA1, so that stations other than STA1 can choose not to receive the radio frame.
  • the radio frame format is a trigger format radio frame.
  • the color value in the physical layer header header signaling field in the radio frame is 0, and the color value in the first signaling domain (ie, signaling domain A) of the physical layer header may be 0.
  • FIG. 8 is a schematic structural diagram of a structure of a node according to an embodiment of the present invention. As shown in FIG. 8 , the method includes at least an establishing module 800 and a determining module 801.
  • the establishing module 800 is configured to establish a direct link between the node that is the peer station and the node where the node is located;
  • the determining module 801 is configured to determine a policy according to the preset direct connection control information, and determine the establishment The direct connection control information corresponding to the direct link is established.
  • the node of the embodiment of the present invention may further include: a transmission module 802 configured to transmit a radio frame by using the established direct link, and carry direct connection control information in the radio frame.
  • the determining module 801 is configured to notify the establishing module 800 when the direct connection control information determining policy is determined by the peer-to-peer negotiation; at this time, the establishing module 800 is configured to: establish a node that is a peer station with the node where the node is located
  • the direct connection control information is negotiated during the process of the direct link.
  • the establishing module 800 may be configured to: send a direct link request frame to a node that is a peer station with the node where the node is located, and the direct link request frame indicates one or more direct connection control information that is available to the node where the node is located.
  • the direct link response frame indicating one or more direct connection control information available to the node whose peer node is the peer site
  • sending a direct link confirmation frame to the node that is the peer station with the node where the node is located, and the direct link link confirmation frame indicates the direct connection control information used by the determined direct link.
  • the direct link request frame, the direct link response frame, and the direct link acknowledgement frame may be associated with the node.
  • the master node performs the transfer.
  • the transmission module 802 is further configured to: send a notification frame to the primary node associated with the node in which it is located, and include at least one of the following information in the notification frame: direct link establishment completion indication, established direct connection The direct connection identifier of the link, the service characteristics of the direct link transmission, and the channel access mode of the direct link.
  • the transmission module 802 is further configured to: receive a notification confirmation frame from the primary node associated with the node where the node is located, and include at least one of the following information in the notification confirmation frame: direct connection to the direct link Identify, specify the channel access mode and channel access parameters of the direct link.
  • the determining module 801 is further configured to: after the direct link is established, change the directly connected identifier, such as a color value, corresponding to the established direct link according to the network condition (such as network load, etc.).
  • the determining module 801 can be configured to: The direct connection control information used by the direct link is determined as the direct connection control information corresponding to the established direct link. At this time, the establishing module 800 completes the direct link construction between the peer sites. Available immediately.
  • the module 801 may be configured to determine the direct connection control information from the primary node associated with the node in which it is located as the direct connection control information corresponding to the established direct link.
  • the direct connection control information from the primary node associated with the node in which the node is located may include: the primary node broadcasts the direct connection identifier, or the primary node allocates the direct connection identifier, or the network identifier of the primary node according to the basic network architecture or the primary node itself
  • the device ID determines the direct identity, and so on.
  • the determining module 801 may be configured to transmit through the wireless channel, except that the direct connection control information used by the direct link is set in advance.
  • the radio frame is checked to determine the network identity of the underlying network architecture that has been used by other surrounding networks or BSSs, as well as to determine the network identifiers that have been occupied by other directly connected links.
  • the determining module 801 may be further configured to: receive the master from the node associated with the node
  • the node carries notification information of measures for controlling the behavior of the site of the directly connected link.
  • the notification information may include, but is not limited to, at least one of the following information: whether the peer station is allowed to freely select the indication of the direct connection identifier; whether the peer station is required to notify the master node of the direct link establishment status indication; Resource usage restriction information.
  • the transmission module 802 can be configured to:
  • the direct connection control information is indicated in the first signaling domain of the radio frame header; in an exemplary embodiment, in order to improve the reliability of the first signaling domain , two or more first signaling domains may be set, that is, the first signaling domain is repeated;
  • the direct connection control information is indicated in the first signaling domain of the radio frame header, and one or more is indicated in the second signaling domain of the radio frame header.
  • the first signaling domain indicates direct connection control information.
  • the radio frame or the trigger format radio frame is an HE format radio frame, and may also include a legacy training domain and a legacy signaling domain for backward compatibility with the conventional WLAN device, and repeat the conventional signaling domain to determine the radio frame adoption.
  • HE frame format is an HE format radio frame, and may also include a legacy training domain and a legacy signaling domain for backward compatibility with the conventional WLAN device, and repeat the conventional signaling domain to determine the radio frame adoption.
  • the embodiment of the present invention further provides a node, including at least a transmission module 802, configured to transmit a radio frame by using the established direct link, and carry direct connection control information in the radio frame.
  • a transmission module 802 configured to transmit a radio frame by using the established direct link, and carry direct connection control information in the radio frame.
  • the node is the secondary node or the primary node.
  • the transmission module 802 can be configured to:
  • the direct connection control information is indicated in the first signaling domain of the radio frame header;
  • the direct connection control information is indicated in the first signaling domain of the radio frame header, and one or Identification of a plurality of target peer sites that receive wireless frames;
  • the above radio frame or the trigger format radio frame is an HE format radio frame.
  • the direct connection control information includes at least one of the following: a direct connection identifier of the direct link, and a transmission direction value of the direct link.
  • the direct connection identifier is the network identifier used by the direct link.
  • the transmission direction value of the direct link is indicated as uplink; when the node is the secondary node, the transmission direction value of the direct link is indicated as downlink.
  • an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, where the computer executable instructions are executed by a processor to implement the method for establishing a direct link.
  • the embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, which are implemented by the processor to implement the method for implementing data transmission by using the direct link described above.
  • computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer.
  • communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .
  • the embodiment of the present invention provides a method for establishing a direct link and a method and a node for implementing the data transmission, which are implemented to optimize the establishment and transmission process of the direct link, so that the direct link is well distinguished from the basic The network architecture links, which improves network efficiency.

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Abstract

本文公开了一种直连链路的建立方法及其实现数据传输的方法和节点，上述建立方法包括：第一节点与第二节点之间建立直连链路，并按照预先设置的直连控制信息确定策略，确定建立好的直连链路对应的直连控制信息。本文公开的方法通过为直连链路确定专门的用于标识直连链路的直连控制信息，实现了对直连链路的建立和传输过程进行优化，使得直连链路很好地区别于基础网络架构的链路，从而提高了网络效率。

Description

直连链路的建立方法及其实现数据传输的方法和节点 技术领域
本申请涉及但不限于无线局域网(WLAN，Wireless Local Area Network)技术，尤指一种直连链路的建立方法及其实现数据传输的方法和节点。
背景技术
无线局域网(WLAN，Wireless LAN)的基本结构为一个接入点站点(AP，Access Point)以及与该AP相关联的多个非接入点站点(non-AP STA，non-AP Station)组成的一个基本服务集(BSS，Basic Service Set)，如图1所示，图1为相关技术中WLAN的基本架构示意图。在图1所示的网络结构下，数据在AP汇聚和分发，即通信一般只发生在non-AP STA和AP之间，AP和non-AP STA的关系，类似在蜂窝网中基站和终端的关系。图1中的AP即是与non-AP STA关联的主节点。本文中，将AP、基站、网状网络(Mesh)站点等统称为主节点，non-AP STA、终端等统称为次节点，且认为主节点和次节点不是对等关系，而主节点和主节点，次节点与次节点为对等关系即对等站点。近年来，对等站点之间的通信需求不断增长，在各个技术领域也出现了对应的技术，比如：在WLAN中提出了同一个BSS内non-AP STA之间进行直连通信的通道直接链路建立(TDLS，Tunnel Direct Link Setup)/直接链路建立(DLS，Direct Link Setup)等技术；再如：蜂窝网提出了支持终端与终端之间通信的设备到设备(D2D，Device-to-Device)等技术；另外，AP站点之间也可以使用Mesh网络等技术进行通信。
目前，随着更多的人使用WLAN进行数据通信，WLAN网络负载也在不断加重，且随着用户数目的增多或WLAN网络之间的干扰，WLAN网络的效率也出现了明显下降的趋势，因此，IEEE标准组织成立了相关的任务小组致力于解决WLAN网络效率问题。其中，网络密集部署情况下的干扰避免和效率提升的技术成为了讨论的热点，正在讨论的技术中包括支持新标准的站点在发送的新格式无线帧的物理层帧头中加入BSS网络标识(Color bits)、站点标识(STA ID)、上行/下行指示(UL/DL flag)，及空间复用参数、预 约传输时长等控制信息，这样，检测到该无线帧的站点就可以提前根据这些控制信息判断后续的无线帧负载或该传输的基本情况，从而决定下一步的操作。这种新格式的无线帧统称为高效(HE，high efficiency)无线帧。举个例子来看，Color bits信息指示了BSS的网络标识，AP确定并将Color bits信息通知给关联的站点，所有的站点在发送的无线帧中都会携带该Color bits信息，站点可以根据检测到的无线帧中指示的Color bits信息来判断该无线帧是否属于自己关联的BSS，并根据上下行指示判断该无线帧是从AP发送到站点的下行链路(Downlink)还是从站点发送到AP的上行链路(uplink)。
当站点根据Color bits信息判定无线帧为关联的BSS的帧，且根据后续的指示判定自身不是该无线帧的接收方，比如该无线帧指示为上行帧，是发送给AP的，那么，BSS内的non-AP站点可以选择不接收后面的数据负载，且不竞争信道，以免对本BSS正在进行的传输造成干扰；当站点根据Color bits信息指示判定无线帧不属于关联的BSS的帧，那么，站点可以根据该无线帧的能量、干扰水平等信息选择进行空间复用，从而增加传输机会。总之，根据BSS的网络标识、上下行指示等信息可以帮助BSS之间更有效地利用无线资源。
上述在HE无线帧的物理层帧头携带控制信息的技术有效地解决了基础构架BSS内数据传输的干扰问题，但是，现有技术的以AP和non-AP STA之间的传输考虑效率提升方案中，没有考虑对等站点之间建立的直连链路和传输过程对基础构架BSS的传输造成的影响，也没有考虑多个直连链路之间的相互影响。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本发明实施例提供一种直连链路的建立方法及其实现数据传输的方法和节点，能够对直连链路的建立和传输过程进行优化，提高网络效率。
本发明实施例提供了一种直连链路的建立方法，包括：
第一节点与第二节点之间建立直连链路，并按照预先设置的直连控制信 息确定策略，确定建立好的直连链路对应的直连控制信息。
所述直连控制信息确定策略可以为所述第一节点与所述第二节点之间协商确定；所述建立方法可以包括：
所述第一节点向所述第二节点发送直连链路请求帧，直连链路请求帧中携带有所述第一节点可用的一个或多个直连控制信息；
所述第一节点接收来自所述第二节点的直连链路响应帧，直连链路响应帧中携带有所述第二节点可用的一个或多个直连控制信息；
所述第一节点向所述第二节点发送直连链路确认帧，直连链路确认帧中携带有确定出的直连链路使用的直连控制信息。
所述建立方法还可以包括：所述第一节点根据自身可用的一个或多个直连控制信息，以及所述第二节点可用的一个或多个直连控制信息，确定所述建立的直连链路使用的直连控制信息。
所述第一节点和所述第二节点可以为次节点；
所述直连链路请求帧、所述直连链路响应帧、所述直连链路确认帧均可以通过所述第一节点和所述第二节点关联的主节点进行中转。
所述第一节点和所述第二节点可以为次节点；所述建立方法还可以包括：
所述第一节点向其关联的主节点发送通知帧，在通知帧中包括以下信息的任意组合：所述直连链路建立完成指示、建立的所述直连链路的直连标识、所述直连链路传输的业务特性、所述直连链路的信道接入方式。
所述主节点收到所述通知帧后，所述建立方法还可以包括：
所述第一节点接收来自所述主节点的通知确认帧，在通知确认帧中至少包括以下信息之一：给所述直连链路分配的直连标识，指定所述直连链路的信道接入方式和信道接入参数。
所述直连控制信息确定策略可以为：将预先设置好的直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息；所述建立方法可以包括：
所述第一节点与所述第二节点间建立直连链路，并将预先设置的直连链 路所使用的直连控制信息确定为建立好的直连链路的直连控制信息。
所述第一节点和所述第二节点可以为次节点；所述直连控制信息确定策略可以为：建立好的直连链路对应的直连控制信息为由与所述第一节点和第二节点关联的主节点确定的直连控制信息；所述建立方法可以包括：
所述第一节点与所述第二节点间建立直连链路；
所述第一节点与所述第二节点从所述主节点广播一个以上直连标识中确定一个直连标识作为所述直连控制信息中的直连标识；或者，所述第一节点与所述第二节点将所述主节点分配的直连标识作为所述直连控制信息中的直连标识；或者，所述第一节点和所述第二节点将所述主节点通知的根据基础网络架构的网络标识或主节点的设备标识确定的直连标识作为所述直连控制信息中的直连标识，或者，所述第一节点和所述第二节点未接收到来自所述第一节点和所述第二节点关联的所述主节点的通知时，将预先设置的保留的值作为直连控制信息中的直连标识。
所述直连控制信息可以包括以下至少之一：所述直连链路的直连标识、所述直连链路的传输方向值。
所述直连标识可以为直连链路使用的网络标识。
当所述第一节点和所述第二节点为主节点时，所述直连链路的传输方向值可以指示为上行；当所述第一节点和所述第二节点为次节点时，所述直连链路的传输方向值可以指示为下行。
所述确定所述直连控制信息中的直连标识之前，所述建立方法还可以包括：
所述第一节点或所述第二节点或主节点通过对无线信道中传输的无线帧进行检查，确定其他网络或BSS已经使用的基础网络架构的网络标识，以及确定其他直连链路已占用的网络标识。
所述直连链路建立之后，所述建立方法还可以包括：
所述第一节点或第二节点根据网络状况更改所述直连链路对应的直连标识。
所述建立方法还可以包括：
所述第一节点或所述第二节点接收来自主节点的携带有用于控制直连链路的站点的行为的措施的通知信息。
所述通知信息可以包括以下信息至少之一：是否允许对等站点自由选择直连标识的指示；是否要求对等站点通知主节点直连链路建立情况的指示；直连链路的资源使用限制信息。
所述第一节点与第二节点可以为对等站点。
所述建立方法还可以包括：对等站点利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
所述对等站点可以为次节点或主节点。
所述在无线帧中携带直连控制信息可以包括：
所述对等站点发送的是单用户格式无线帧，在所述无线帧帧头的第一信令域中指示所述直连控制信息；或者，
所述对等站点发送的是多用户格式无线帧，在所述无线帧帧头的第一信令域中指示所述直连控制信息，在所述无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；或者，
所述对等站点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到所述触发帧的多个其他对等站点中的至少一个返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示所述直连控制信息。
所述无线帧或所述触发格式无线帧可以为高效(HE)格式无线帧。
本发明实施例还公开了一种直连链路实现数据传输的方法，包括：对等站点利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
所述对等站点可以为次节点或主节点。
所述在无线帧中携带直连控制信息可以包括：
所述对等站点发送的是单用户格式无线帧，在所述无线帧帧头的第一信令域中指示所述直连控制信息；或者，
所述对等站点发送的是多用户格式无线帧，在所述无线帧帧头的第一信 令域中指示所述直连控制信息，在所述无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；或者，
所述对等站点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到所述触发帧的多个其他对等站点中的至少一个返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示所述直连控制信息。
所述无线帧或所述触发格式无线帧可以为HE格式无线帧。
所述直连控制信息可以包括以下至少之一：所述直连链路的直连标识、所述直连链路的传输方向值。
所述直连标识可以为直连链路使用的网络标识。
当所述对等站点为主节点时，所述直连链路的传输方向值可以指示为上行；当所述对等站点为次节点时，所述直连链路的传输方向值可以指示为下行。
本发明实施例又公开了一种节点，至少包括建立模块、确定模块；其中，
建立模块，配置为建立与自身所在节点为对等站点的节点之间的直连链路；
确定模块，配置为按照预先设置的直连控制信息确定策略，确定建立好的直连链路对应的直连控制信息。
所述节点还可以包括：传输模块，配置为利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
所述确定模块可以配置为：当所述直连控制信息确定策略为对等站点间协商确定时，通知所述建立模块；
所述建立模块可以配置为：在建立与自身所在节点为对等站点的节点之间的直连链路的过程中协商出所述直连控制信息。
所述建立模块可以配置为：向与自身所在节点为对等站点的节点发送直连链路请求帧，直连链路请求帧中携带有自身所在节点可用的一个或多个直连控制信息；接收来自与自身所在节点为对等站点的节点的直连链路响应帧，直连链路响应帧中携带有与自身所在节点为对等站点的节点可用的一个或多 个直连控制信息；向与自身所在节点为对等站点的节点发送直连链路确认帧，直连链路确认帧中携带有确定出的直连链路使用的直连控制信息。
当所述节点和与自身为对等站点的节点为次节点时，所述直连链路请求帧、所述直连链路响应帧、所述直连链路确认帧可以通过与所述节点关联的主节点进行中转。
所述传输模块还可以配置为：向与自身所在节点关联的主节点发送通知帧，在通知帧中包括以下信息的任意组合：直连链路建立完成指示、建立的直连链路的直连标识、直连链路传输的业务特性、直连链路的信道接入方式。
所述传输模块还可以配置为：接收来自自身所在节点关联的主节点的通知确认帧，在通知确认帧中至少包括以下信息之一：给所述直连链路分配的直连标识、指定所述直连链路的信道接入方式和信道接入参数。
所述确定模块还可以配置为：所述直连链路建立后，根据网络状况更改建立好的所述直连链路对应的直连控制信息的直连标识。
当所述直连控制信息确定策略为将预先设置的直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息时，所述确定模块可以配置为：
将预先设置的直连链路所使用的直连控制信息确定为已建立的所述直连链路对应的直连控制信息。
当所述节点以及与该节点为对等站点的节点为次节点，且所述直连控制信息确定策略为已建立的直连链路对应的直连控制信息为由主节点确定的直连控制信息时，确定模块可以配置为：
将来自与自身所在节点关联的主节点的直连控制信息确定为已建立的直连链路对应的直连控制信息。
所述来自与自身所在节点关联的主节点的直连控制信息可以包括：所述主节点广播直连标识，或所述主节点分配直连标识，或所述主节点根据基础网络架构的网络标识或所述主节点自身的设备标识确定所述直连控制信息中的直连标识。
所述确定模块还可以配置为：通过对无线信道中传输的无线帧进行检查， 确定其他网络或BSS已经使用的基础网络架构的网络标识，以及确定其他直连链路已占用的网络标识。
所述确定模块还可以配置为：
接收来自与自身所在节点关联的主节点的携带有用于控制直连链路的站点的行为的措施的通知信息。
所述通知信息可以包括以下信息至少之一：是否允许所述对等站点自由选择直连标识的指示；是否要求所述对等站点通知主节点直连链路建立情况的指示；所述直连链路的资源使用限制信息。
所述传输模块可以配置为：
当所述传输模块自身所在节点发送的是单用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息；
当所述传输模块自身所在节点发送的是多用户格式无线帧，在无线帧帧头的第一信令域中指示所述直连控制信息，在无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；
当所述传输模块自身所在节点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到触发帧的多个其他对等站点中的至少一个会返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示所述直连控制信息。
所述无线帧或所述触发格式无线帧可以为HE格式无线帧。
本发明实施例再公开了一种节点，至少包括传输模块，配置为利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
所述节点可以为次节点或主节点。
所述传输模块可以配置为：
当所述传输模块自身所在节点发送的是单用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息；
当所述传输模块自身所在节点发送的是多用户格式无线帧，在无线帧帧头的第一信令域中指示所述直连控制信息，在无线帧帧头的第二信令域中指 示一个或多个接收无线帧的目标对等站点的标识；
当所述传输模块自身所在节点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到触发帧的多个其他对等站点中的至少一个会返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示所述直连控制信息。
所述无线帧或所述触发格式无线帧可以为HE格式无线帧。
所述直连控制信息可以包括以下至少之一：所述直连链路的直连标识、所述直连链路的传输方向值。
所述直连标识可以为直连链路使用的网络标识。
当所述节点为主节点时，所述直连链路的传输方向值可以指示为上行；
当所述节点为次节点时，所述直连链路的传输方向值可以指示为下行。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现上述直连链路的建立方法。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现上述直连链路实现数据传输的方法。
本申请提供的直连链路的建立方法包括：第一节点与第二节点之间建立直连链路，并按照预先设置的直连控制信息确定策略，确定建立好的直连链路对应的直连控制信息。本申请方法通过为直连链路确定专门的用于标识直连链路的直连控制信息，实现了对直连链路的建立和传输过程进行优化，使得直连链路很好地区别于基础网络架构的链路，从而提高了网络效率。
在示例性实现方式中，直连控制信息确定策略可以包括但不限于：第一节点与第二节点之间协商确定；或者，将预先设置好直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息；或者，当第一节点和第二节点为次节点时，建立好的直连链路对应的直连控制信息为由主节点确定的直连控制信息，比如：主节点广播直连标识，或主节点分配直连标识，或主节点根据基础网络架构的网络标识确定直连标识，等等。
本申请的其它特征和优点将在随后的说明书中阐述，并且，部分地从说 明书中变得显而易见，或者通过实施本申请而了解。本申请的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图概述
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1为相关技术中WLAN的基本架构示意图；
图2为本发明实施例的直连链路的一种建立方法的流程图；
图3为本发明实施例的同一BBS下建立的链路示意图；
图4为本发明实施例的不同BBS下建立的链路示意图；
图5为本申请的单用户格式无线帧下HE无线帧格式实施例的示意图；
图6为本申请的多用户格式无线帧下HE无线帧格式实施例的示意图；
图7为本申请的触发格式无线帧下HE无线帧格式实施例的示意图；
图8为本发明实施例的节点的一种组成结构示意图。
本发明的实施方式
下文中将结合附图对本发明实施例进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
本发明实施例提供的直连链路的建立方法包括：第一节点与第二节点之间建立直连链路，并按照预先设置的直连控制信息确定策略，确定建立好的直连链路对应的直连控制信息。
其中，直连控制信息确定策略可以包括但不限于：
第一节点与第二节点之间协商确定；或者，
将预先设置好直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息；或者，
当第一节点和第二节点为次节点时，建立好的直连链路对应的直连控制 信息为由主节点确定的直连控制信息，比如：主节点广播直连标识，或主节点分配直连标识，或主节点根据基础网络架构的网络标识确定直连标识，等等。
本发明实施例的方法通过为直连链路确定专门的用于标识直连链路的直连控制信息，实现了对直连链路的建立和传输过程进行优化，使得直连链路很好地区别于基础网络架构的链路，从而提高了网络效率。
图2为本发明实施例的直连链路的一种建立方法的流程图，当直连控制信息确定策略为：第一节点与第二节点之间协商确定时，如图2所示，本实施例的直连链路的建立方法包括：
步骤200：第一节点向第二节点发送直连链路请求帧，直连链路请求帧中指示有第一节点可用的一个或多个直连控制信息。
其中，第一节点与第二节点为对等站点，且属于同一个网络或BSS。
其中，直连控制信息包括以下至少之一：直连链路的直连标识、传输方向值。其中，直连标识为直连链路使用的网络标识，如color值。
其中，当上述对等站点(即第一节点和第二节点)为主节点时，直连链路的传输方向值可以指示为上行；当对等站点为次节点时，直连链路的传输方向值可以指示为下行。
步骤201：第一节点接收来自第二节点的直连链路响应帧，直连链路响应帧中指示有第二节点可用的一个或多个直连控制信息。
步骤202：第一节点向第二节点发送直连链路确认帧，直连链路确认帧中指示有确定出的直连链路使用的直连控制信息。
其中，第一节点根据自身可用的一个或多个直连控制信息，以及第二节点返回的第二节点可用的一个或多个直连控制信息，确定第一节点与第二节点间建立的直连链路使用的直连控制信息。
其中，确定第一节点与第二节点间建立的直连链路使用的直连控制信息可以采用以下策略：
第一站点可用的直连控制信息的集合与第一站点可用的直连控制信息的集合的交集中的任一个作为确定出的直连控制信息；如果二者没有交集，那 么，第一站点从自身可用的集合或第二节点可用的集合中任选一个作为确定出的直连控制信息；或者，
也可以限定第二节点返回的直连控制信息的集合为第一站点发送的可用集合的子集，这样，第一站点从第二站点返回的可用集合中选择出任一个作为确定出的直连控制信息即可；等等。
需要说明的是，当第一节点和第二节点为次节点时，上述直连链路请求帧、直连链路响应帧、直连链路确认帧可以通过第一节点和第二节点关联的主节点进行中转。
在示例性实现方式中，当第一节点和第二节点为次节点时，图2所示的直连链路的建立方法还可以包括：
第一节点向其关联的主节点发送通知帧，在通知帧中至少包括以下信息之一：直连链路建立完成指示、建立的直连链路的直连标识、直连链路传输的业务特性、直连链路的信道接入方式等。
其中，直连链路传输的业务特性可以包括直连链路的速率、业务规范、要占用的资源等信息；直连链路的信道接入方式可以指示第一站点和第二站点占用资源的方式，比如可以是基于竞争的信道接入方式，或者是基于调度的信道接入方式，再如由主节点分配资源，又或者是二者的组合等。
这样，通过接收通知帧，主节点获知了与其关联的次节点间建立的直连链路的情况。
在示例性实施方式中，主节点在收到来自第一节点的通知帧后，可以进一步向第一节点发送通知确认帧，在通知确认帧中至少包括以下信息之一：给直连链路分配的直连标识、指定直连链路的信道接入方式和信道接入参数等。这样，实现了由主节点控制直连链路的站点之间的通信，更好地避免了基础构架的传输和直连链路的传输相互干扰。
需要说明的是，通知确认帧中的给直连链路分配的直连标识可以不同于通知帧中携带的建立的直连链路的直连标识，比如站点上报标识为A，AP可以指示为B。
其中，通知确认帧中的指定直连链路的信道接入方式可以为以下至少之 一：竞争方式、调度方式。比如：假设次节点指示给AP自身想要的接入方式为自由竞争信道，但是，AP可以指示次节点为调度接入方式，即AP给直连链路分配资源的方式而不允许站点自由竞争接入。由于主节点清楚整个网络的负载，因此，由主节点来决定最终的接入方式是合理的，比如：如果网络负载较重，可以限制次节点的竞争，如果网络负载较轻，可以让次节点自由竞争等。
在示例性实现方式中，直连链路建立之后，对等站点也可以根据网络状况(如负载情况等)更改直连链路对应的直连标识(如color值)，更改的过程和建立过程类似，这里不再赘述。
图2所示的直连链路的建立中，通过协商的方式确定了直连链路的直连控制信息。另外，也可以采用下面的方式来确定直连链路的直连控制信息。
一种方式是，直连控制信息确定策略为：将预先设置好的直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息。其中，预先设置好直连链路所使用的直连控制信息，这样，只要建立好第一节点与第二节点的直连链路，直接将预先设置的直连控制信息确定为建立好的直连链路的直连控制信息即可。也就是说，这种方式通过专门设置的直连链路的直连控制信息区分了不同的传输(即直连链路的传输和基础网络架构的传输)。
其中，第一节点与第二节点为对等站点，第一节点与第二节点可以属于同一个网络或BSS。
其中，直连控制信息包括以下至少之一：直连链路的直连标识、传输方向值。其中，直连标识为直连链路使用的网络标识，如color值。
其中，当对等站点为主节点时，直连链路的传输方向值可以指示为上行；当对等站点为次节点时，直连链路的传输方向值可以指示为下行。
另一种方式是，当对等站点为次节点时，直连控制信息确定策略为：建立好的直连链路对应的直连控制信息为由主节点确定的直连控制信息。在建立好第一节点与第二节点的直连链路后，可以采用以下方法确定直连链路的直连控制信息：
主节点广播直连标识：主节点通知一个或多个专门分配给直连链路的直 连标识，如网络标识color值，这样，主节点所属本BSS内的所有次节点若建立直连链路，直连标识就是主节点广播的一个或多个网络标识中的一个，这里，可以通过随机选择的方式选择出主节点广播的一个直连标识；或者，通过次节点探测信道的无线帧，将出现得少的那个直连标识选择为直连链路的标识，该直连标识即为没有冲突或冲突较少的直连标识；进一步地，根据网络状况如负载情况等，主节点也可以更新分配给直连链路的网络标识；或者，
主节点给当前建立的直连链路分配(相当于单播配置即为某个直连对单独配置一个直连标识)直连标识：主节点获知(如收到当前建立的直连链路的第一节点的通知)有直连链路建立完成，为当前建立的直连链路分配直连标识并通知给建立该直连链路的第一节点和第二节点；或者，
主节点根据基础网络架构的网络标识或主节点的设备标识确定直连标识，并通知给连接当前建立的直连链路的第一节点和第二节点。其中，根据基础网络架构的网络标识或主节点的设备标识确定直连标识包括：本BSS内建立的直连链路的直连标识等于基础网络架构的网络标识；或者，直连标识为基础网络架构的网络标识加上预先设置的特定值后得到的一个值；或者，直连标识为基础网络架构的网络标识经过运算后得到的一个值，其中，运算可以是如减法、异或、求模等常见的运算或这些运算的任意组合。需要说明的是，当建立直连链路的次节点没有从所在的网络或BSS的主节点获取到基础网络架构的网络标识(如主节点为传统站点，无此能力，即基础架构网络没有网络标识等)时，即未接收到来自所述第一节点和所述第二节点关联的所述主节点的通知时，直连标识可以为预先设置的保留的一个值。
需要说明的是，对于所有的网络标识都被其他直连链路或网络占用时，表明网络非常密集，此时，即选择哪个直连标识都不合适时，对等站点可以使用基础网络的标识。
在上述本发明实施例提供的确定直连链路的直连控制信息的方法中，除了采用预先设置好的直连链路所使用的直连控制信息的方式外，
一方面，在对等站点确定直连标识之前，本实施例的建立方法还可以包括：
对等站点(即第一节点或第二节点)或主节点通过对无线信道中传输的无线帧进行检查(即检查无线信道中传输的无线帧携带的控制信息或网络标识，如检查无线帧的物理层帧头中的第一信令域，以确定哪些网络标识正在被其他网络或链路使用)，确定周围的其他网络或BSS已经使用的基础网络架构的网络标识，以及确定周围的其他直连链路已占用的网络标识；这样，在后续第一节点与第二节点之间协商直连控制信息，或主节点广播或分配直连控制信息时，可以选择与这些被占用的网络标识不同的值来作为当前建立的直连链路的直连标识。
另一方面，在直连链路建立之后，该建立方法还包括：对等站点也可以根据周围网络环境的变化更改直连链路使用的网络标识。其中，可以通过空口检测其他站点的无线帧，判断网络标识或直连标识冲突情况，如果冲突严重(如收到的直连标识与自身一样的无线帧)时，可以选择更改其他直连标识以避免冲突。其中，更改直连标识的过程和确定直连标识的过程类似，比如，假设第一节点判断出存在冲突的情况，第一节点发送携带有更改后的直连标识的切换直连标识请求帧给第二节点，第二节点发送切换响应帧给第一节点，第一节点最后发送确认帧即可完成直连标识的更改过程。
另外，当对等站点为次节点时，为了提高网络效率，减少直连链路竞争资源带来的干扰，进一步地，主节点还可以选择一些措施，以控制直连链路的站点的行为，比如：对等站点关联的主节点向对等站点发送通知信息，通知信息可以包括以下信息至少之一：
是否允许对等站点自由选择直连标识的指示，这样，限制了对等站点直连链路随意使用color值的情况，比如：如果不允许，那么，在建立直连链路时选择的color值只能为基础架构网络对应的color值或预先设置的保留值；如果允许，那么对等站点可以采用如图2所示的方法协商确定直连链路的color值；
是否要求对等站点通知主节点直连链路建立情况的指示，这样，如果要求，那么对等站点间建立好直连链路并确定直连控制信息后，需要将直连链路建立的相关信息(如直连链路建立完成指示、建立的直连链路的直连标识、直连链路传输的业务特性、直连链路的信道接入方式等)上报给主节点；
直连链路的资源使用限制信息，比如可以限制直连链路的传输资源必须在主节点指示的资源上，使用主节点指示的资源接入参数或信道接入方式获取传输机会等。
本发明实施例还提供一种直连链路实现数据传输的方法，包括：对等站点利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
需要说明的是，本发明实施例提供的直连链路实现数据传输的方法可以基于本发明实施例的直连链路建立方法，也可无需限定如何实现直连链路的建立，只要直连链路建立好并确定了建立好的直连链路的直连控制信息即可。
其中，直连控制信息包括以下至少之一：直连链路的直连标识、传输方向值。其中，直连标识可以为直连链路使用的网络标识，如color值。
其中，当对等站点为主节点时，直连链路的传输方向值可以指示为上行；当对等站点为次节点时，直连链路的传输方向值可以指示为下行。
其中，在无线帧中携带直连控制信息包括：
如果对等站点发送的是单用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息；一些实现方式中，为了提高第一信令域的可靠性，可以设置两个或两个以上第一信令域即重复第一信令域；
如果对等站点发送的是多用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息，在无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；
如果对等站点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到触发帧的多个其他对等站点中的至少一个会返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示直连控制信息。
上述无线帧或触发格式无线帧为HE格式无线帧，还可以包含用于后向兼容以前的传统的WLAN设备的传统训练域和传统信令域，并且通过重复传统信令域以确定无线帧采用HE帧格式。
下面结合具体实施例对本发明实施例提供的技术方案进行详细描述。
图3为本发明实施例同一BBS下建立的链路示意图，如图3所示，粗实 线表示基础网络架构中的链路，细实线表示直连链路。如图3所示，与STA1～STA10关联的主节点即为AP。
第一实施例中，假设AP和多个站点(STA1～STA10)组成一个BSS，并假设AP发送广播帧，通知所有的STA基础网络架构的网络标识color的值为3，则在STA发送给AP的无线帧中，将无线帧物理层帧头信令域中的color域设置为3，将上向/下行标志(UL/DL flag)设置为上行，而AP发送给STA的无线帧中，将无线帧物理层帧头信令域中的color域设置为3，将UL/DL flag设置为下行。
第一实施例中，假设STA1～STA3支持直连技术如TDSL或DSL等，并假设STA1作为发起方，即第一节点分别和STA2、STA3进行了隧道直连链路建立，建立过程包括：
STA1通过AP的透传中转直连链路请求帧给STA2，STA2若同意建立TDLS则通过AP透明中转直连链路响应帧给STA1，最后STA1通过AP透明中转直连链路确认帧给STA2，这样，STA1与STA2间的直连链路即建立好；同样的过程，STA1和STA3也建立了直连链路，这里不再赘述，建立好的链路示意图如图3所示。其中，通过AP透明中转是指STA1～STA3利用基础网络架构，通过AP互相发送建立链路需要的帧，STA1～STA3将这些帧进行封装，在AP看来这些帧和普通的数据帧没有区别，AP会像中转普通的数据帧那样中转这些直连建立管理帧，也就是说，在站点建立直连链路的过程中，AP并不知晓，是透明的。
如图3所示，在这种场景下，存在三种传输，每个STA到AP的基础构架上行传输，AP到每个STA的基础构架下行传输，建立有直连链路的STA间的直连传输。
为了区分不同的传输，本实施例中将直连链路传输的无线帧的物理层帧头信令域中的color域设置为预先设置的特殊值0，即0代表直连标识，同时将上行/下行标志设置为下行。这样，当站点接收到无线帧并检测到物理层帧头后，就可以判断该无线帧的传输类型。比如：
图3中的STA1～STA3既是直连链路的对等站点，又是AP建立的基础网络架构的链路的STA。当STA1～STA3接收到color值为0、上行/下行标 志设置为下行的无线帧时，可以判定该无线帧在直连链路上传输，因此，自己可能是接收方，需要继续接收该无线帧；当STA1～STA3接收到color值为3、上行/下行标志设置为下行的无线帧时，可以判定该无线帧为自己关联的AP发送的下行帧，因此，自己也可能是接收方，需要继续接收该无线帧；当STA1～STA3接收到color值为3、上行/下行标志设置为上行的无线帧时，可以判定该无线帧是其他STA发送给AP的，因此，自己不可能是接收方，可以放弃接收该无线帧。
对于图3中的STA4～STA10，它们没有直连链路，但是是AP建立的基础网络架构的链路下的STA，当STA4～STA10接收到color值为0、上行/下行标志设置为下行的无线帧时，可以判定该无线帧在直连链路上传输，因此，自己不可能是接收方，可以放弃接收该无线帧；当STA4～STA10接收到color值为3、上行/下行标志设置为下行的无线帧时，可以判定该无线帧为自己关联的AP发送的下行帧，因此，自己可能是接收方，需要继续接收该无线帧；当STA4～STA10接收到color值为3、上行/下行标志设置为上行的无线帧时，可以判定该无线帧是其他STA发送给AP，因此，自己不可能是接收方，可以放弃接收该无线帧。
对于图3中的AP，只有接收到color值为3、上行/下行标志设置为上行的无线帧才判定是STA发送给自己的，此时AP继续接收，其他情况AP可以选择不接收。
图4为本发明实施例的不同BBS下建立的链路示意图，如图4所示，粗实线表示基础网络架构中的链路，细实线表示次节点间的直连链路，细虚线表示主节点间的直连链路。如图4所示，与STA1～STA5关联的主节点为AP1，与STA6～STA10关联的主节点为AP2。
第二实施例中，假设AP1和多个站点STA1～STA5组成BSS1，AP2和多个站点STA6～STA10组成BSS2；并假设BSS1的网络标识color的值为3，BSS2的网络标识color的值为5。
第二实施例中，假设STA1和STA2支持TDLS且在同一个BSS内，假设STA1和STA2建立了直连链路，STA1和STA2是对等的次节点；假设AP1和AP2也建立了直连链路，但是这属于主节点之间的直连链路，可以为 mesh形式的链路，也可以是类似AP簇的直连链路。
本实施例中的直连链路有两种类型，一种是主节点之间的，另一种是次节点之间的，为了区分这两种直连链路，本实施例中将次节点直连链路传输的无线帧的物理层帧头信令域中的color域设置为特殊值0，并统一将上行/下行标志设置为下行；将主节点直连链路传输的无线帧的物理层帧头信令域中的color域设置为特殊值0，并统一将上行/下行标志设置为上行。这样就可以通过上行/下行指示域区分不同的链路传输的无线帧。比如，对于每个STA，当接收到无线帧并检测到color值为0、指示为上行的无线帧时，可以选择不接收该无线帧。而不同BSS之间的传输可以通过color域的值来区分，比如：当STA1接收到无线帧并检测出color值为5时，可以判断出该无线帧与自己无关，从而可以选择不继续接收。
第三实施例，假设AP和多个站点STA1～STA10组成一个BSS，并假设AP发送广播帧，通知所有的STA网络的标识color的值为3。第一实施例中假设STA1～STA3支持直连技术如TDSL或DSL等，假设STA1作为发起方，即第一节点分别和STA2，STA3进行了隧道直连链路建立，第三实施例中，假设直连链路对应的color值是协商的，可以包括：
STA1通过AP的透传中转直连链路请求帧给STA2，在直连链路请求帧中携带有STA1可用的一个或多个color值，STA2若同意建立直连链路，则通过AP透明中转直连链路响应帧给STA1，在直连链路响应帧中携带有STA2可用的一个或多个color值，最后STA1通过AP透明中转直连链路确认帧给STA2，并在直连链路确认帧中携带有确定出的STA1和STA2的直连链路的color值，这样，STA1与STA2间的直连链路即建立好。采用同样的过程，STA1和STA3之间也可以协商使用的color值，该值可以和STA1与STA2之间链路的color值相同或不相同。建立的链路示意图可参见图3所示。
另外，直连链路建立后，对等站点也可以根据网络状况的变化情况(如负载情况等)更改直连链路对应的color值，以避免与其他直连链路的color值之间冲突的问题，更改的过程和建立过程类似，在本发明实施例上述建立过程的基础上，对于本领域技术人员来说是容易实现的，这里不再赘述。
进一步地，对等次节点(如本实施例中的STA1，STA2)完成直连链路 建立后可以发送一个通知帧给所关联的AP。比如：STA1发送一个通知帧给AP，由于TDLS建立的透明性，若直连站点不发送任何帧给AP的话，AP将不知道直连链路的信息，本实施例中的通知帧就是用于通知AP建立的直连链路的情况，在通知帧中可以包括直连链路建立完成指示、建立的直连链路使用的直连标识、直连链路传输的业务特性、直连链路的信道接入方式等信息。其中，直连链路传输的业务特性可以包括直连链路的速率、业务规范、要占用的资源等信息；直连链路的信道接入方式可以指示STA1和STA2占用资源的方式，比如可以是基于竞争的信道接入方式，或者是基于调度的信道接入方式，再如由AP分配资源，又或者是二者的组合。通过接收该通知帧，AP获知了直连链路的情况。
进一步地，AP接收到上述通知帧后，也可以回复一个通知确认帧给对等次节点，在通知确认帧中可以包括以下信息之一：给直连链路分配的直连标识、指定直连链路的信道接入方式和信道接入参数等。这样，实现了由主节点控制直连链路的站点之间的通信，更好地避免了基础构架的传输和直连链路的传输相互干扰。
第四实施例进一步说明除了第一实施例、第二实施例以及第三实施例中确定直连标识的方法外，次节点确定直连标识的方法还可以采用第四实施例的方式。在第四实施例中，假设AP和多个站点STA1～STA10组成一个BSS，假设AP发送广播帧，通知所有的STA基础网络架构的网络标识color的值为3。其中，假设STA1～STA3支持直连技术如TDSL或DSL等，并假设STA1作为发起方分别和STA2、STA3进行了隧道直连链路建立。本实施例中，STA1～STA3之间的直连链路对应的标识的确定方法可以为：
AP广播直连标识，即AP通知一个或多个专门分配给直连链路的直连标识如网络标识color值，这样，本BSS内的所有STA若建立直连链路，则直连标识必须为AP广播的一个或多个color值中的一个。进一步地，根据网络状况，AP也可以更新分配给直连链路的网络标识。
或者，AP给当前建立的直连链路分配直连标识，即AP将专门分配给直连链路的直连标识(如网络标识color值)通知给一对本BSS建立直连链路的站点，比如：AP将专门分配的color值0通知给STA1和STA2以作为二 者间建立的直连链路的直连标识。具体的过程可以为：直连链路的对等站点如STA1发送直连链路的通知信息给关联的AP，AP根据直连链路通知信息分配一个标识给该直连链路，其中，通知信息可以携带在发送给AP的通知帧中，可以包括以下任意组合的信息：直连链路建立完成指示、直连链路传输的业务特性、直连链路的信道接入方式等信息。
又或者，当AP获知基础网络架构的网络标识color值时，直连标识为基础网络架构的网络标识color值经过运算得出的特定值。比如：本BSS内建立的直连链路的标识等于基础网络架构的标识；再如：直连标识为基础网络架构的网络标识color值加上预先设置的特定值后得到的一个值；又如：直连标识为基础网络架构的网络标识color值经过其他的运算方式或运算方式组合后的值，其中，运算可以是如减法、异或、求模等常见的运算或这些运算的任意组合。需要说明的是，当直连链路所关联的AP没有获知基础网络架构的网络标识color值，那么，直连标识可以就是预先设置的保留的网络标识color特殊值。
第五实施例，基于本发明实施例的不采用固定的直连标识的情况如协商的方式等，在对等站点确定直连标识之前，本实施例的建立方法还可以包括：
通过对无线信道中传输的无线帧进行检查，确定周围的其他网络或BSS已经使用的基础网络架构的网络标识color值，以及确定周围的其他直连链路已占用的网络标识color值，从而尽量选择与这些被占用的网络标识不同的值来作为要建立的直连链路的直连标识。
直连链路建立之后，对等站点也可以根据周围网络环境的变化更改直连链路使用的网络标识color值。其中，可以通过空口检测其他站点的无线帧，判断网络标识或直连标识冲突情况，如果冲突严重(如收到的直连标识与自身一样的无线帧)时，可以选择更改其他标识以避免冲突。
另外，对等站点为次节点时，为了提高网络效率，减少直连链路竞争资源带来的干扰，AP可以选择一些措施来控制直连链路站点的行为。
比如，AP可以限制STA直连链路随意使用color值，其中，AP可以发送一个通知帧如信标帧(Beacon)给该STA，并在该通知帧中指示是否允许直连站点之间自由选择使用的color值，如果AP在通知帧中指示不允许，那 么，STA在建立直连链路时选择的color值只能为基础网络架构对应的color值，或特殊的保留值如0值等；如果AP在通知帧中指示允许，那么，STA可以使用如自身协商过程确定的color值。
再如：AP也可以在Beacon帧中指示本网络内的次节点不能建立直连链路。又或者AP允许本网络内的次节点之间建立直连链路，但是在Beacon帧中指示直连链路建立完成后对等站点必须通知AP直连链路的业务特性等直连链路的建立情况。另外，AP还可以直接通知直连链路的资源使用限制信息，比如可以限制直连链路的传输资源必须在AP指示的资源上进行、使用AP指示的资源接入参数或信道接入方式获取传输机会等。
第六实施例，对等站点的直连链路建立完成且确定了直连控制信息之后，本实施例提供的直连链路实现数据传输的方法包括：对等站点利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。其中，无线帧可以是HE无线帧。
如果对等站点发送的是单用户格式无线帧，如图5所示，图5为本发明实施例的单用户格式无线帧下HE无线帧格式实施例的示意图，在无线帧帧头的第一信令域(即信令域A)中指示直连控制信息。一些实现方式中，为了提高第一信令域(即信令域A)的可靠性，可以将设置两个或两个以上第一信令域(即信令域A)，也就是说重复第一信令域(即信令域A)。
如果对等站点发送的是多用户格式无线帧，如图6所示，图6为本发明实施例的多用户格式无线帧下HE无线帧格式实施例的示意图，在无线帧帧头的第一信令域(即信令域A)中指示直连控制信息，在无线帧帧头的第二信令域(即信令域B)中指示一个或多个接收无线帧的目标对等站点的标识。
如果对等站点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到触发帧的多个其他对等站点中的至少一个会返回触发格式无线帧，如图7所示，图7为本发明实施例的触发格式无线帧下HE无线帧格式实施例的示意图，与单用户格式无线帧类似，在触发格式无线帧帧头的第一信令域(即信令域A)中指示直连控制信息。
上述HE格式无线帧，如图5至图7所示，还包含用于后向兼容以前的传统的WLAN设备的传统训练域和传统信令域，并且通过重复传统信令域以 确定无线帧采用HE帧格式。
举个例子来看，假设AP和多个站点STA1～STA10组成一个BSS，并假设STA1和STA2，STA1和STA3分别建立了直连链路，而且基础网络架构的color的值为3，为了区分不同的传输，本实施例中假设直连链路的color值为0。在直连链路建立好且确定了直连标识后，
比如：假设STA1分别发送无线帧给STA2或STA3，其格式为单用户无线帧格式，结合图5所示，将无线帧中的物理层帧头信令域中的color值设为0，可以将物理层帧头第一信令域(即信令域A)中的color域设为0，将信令域A中的UL/DL域(图5中未示出)设置为下行。同样的，STA2或STA3发送给STA1的无线帧也是如此设置。
再如：假设STA1并行发送无线帧给STA2和STA3，其格式为多用户无线帧格式，结合图6所示，将无线帧中的物理层帧头信令域中的color值设为0，可以将物理层帧头第一信令域(即信令域A)中的color域设为0，将信令域A中的UL/DL域(图6中未示出)设置为下行，且在第二信令域(即信令域B)中携带STA2和STA3的标识，以及发送给STA2和STA3数据的发送参数和资源位置。对等站点也可以使用多用户无线帧格式发送一个用户的数据，如STA2使用多用户无线帧格式发送数据给STA1，这样无线帧就可以携带信令域B，信令域B中指示接收方为STA1，这样除STA1之外的站点就可以选择不接收该无线帧。
又如：假设STA1发送触发帧给STA2和STA3，通知STA2和STA3并行发送数据给STA1，接收到触发帧后，STA2和STA3并行发送无线帧给STA1，该无线帧格式为触发格式无线帧，结合图7所示，将无线帧中的物理层帧头信令域中的color值为0，可以将物理层帧头第一信令域(即信令域A)中的color值为0。
图8为本发明实施例的节点的一种组成结构示意图，如图8所示，至少包括建立模块800、确定模块801；其中，
建立模块800，配置为建立与自身所在节点为对等站点的节点之间的直连链路；
确定模块801，配置为按照预先设置的直连控制信息确定策略，确定建 立好的直连链路对应的直连控制信息。
本发明实施例的节点还可以包括：传输模块802，配置为利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
其中，确定模块801配置为：当直连控制信息确定策略为对等站点间协商确定时，通知建立模块800；此时，建立模块800配置为：在建立与自身所在节点为对等站点的节点之间的直连链路的过程中协商出直连控制信息。其中，建立模块800可以配置为：向与自身所在节点为对等站点的节点发送直连链路请求帧，直连链路请求帧中指示有自身所在节点可用的一个或多个直连控制信息；接收来自与自身所在节点为对等站点的节点的直连链路响应帧，直连链路响应帧中指示有与自身所在节点为对等站点的节点可用的一个或多个直连控制信息；向与自身所在节点为对等站点的节点发送直连链路确认帧，直连链路确认帧中指示有确定出的直连链路使用的直连控制信息。
在示例性实施方式中，当节点和与自身为对等站点的节点为次节点时，上述直连链路请求帧、直连链路响应帧、直连链路确认帧可以通过与节点关联的主节点进行中转。
在示例性实施方式中，传输模块802还配置为：向与自身所在节点关联的主节点发送通知帧，在通知帧中至少包括以下信息之一：直连链路建立完成指示、建立的直连链路的直连标识、直连链路传输的业务特性、直连链路的信道接入方式等。
在示例性实施方式中，传输模块802还配置为：接收来自于自身所在节点关联的主节点的通知确认帧，在通知确认帧中至少包括以下信息之一：给直连链路分配的直连标识、指定直连链路的信道接入方式和信道接入参数等。
在示例性实施方式中，确定模块801还配置为：直连链路建立后，根据网络状况(如网络负载等)更改建立好的直连链路对应的直连标识，如color值。
当直连控制信息确定策略为将预先设置好直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息时，确定模块801可以配置为：将预先设置好直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息。此时，建立模块800完成对等站点之间的直连链路建 立即可。
当节点以及与该节点为对等站点的节点为次节点，且直连控制信息确定策略为建立好的直连链路对应的直连控制信息为由主节点确定的直连控制信息时，确定模块801可以配置为：将来自与自身所在节点关联的主节点的直连控制信息确定为建立好的直连链路对应的直连控制信息。其中，来自与自身所在节点关联的主节点的直连控制信息可以包括：主节点广播直连标识，或主节点分配直连标识，或主节点根据基础网络架构的网络标识或所述主节点自身的设备标识确定直连标识，等等。
上述确定直连链路的直连控制信息的方法中，除了采用预先设置好的直连链路所使用的直连控制信息的方式外，确定模块801还可以配置为：通过对无线信道中传输的无线帧进行检查，确定周围的其他网络或BSS已经使用的基础网络架构的网络标识，以及确定周围的其他直连链路已占用的网络标识。
当对等站点为次节点时，为了提高网络效率，减少直连链路竞争资源带来的干扰，在示例性实施方式中，确定模块801还可以配置为：接收来自与自身所在节点关联的主节点的携带有用于控制直连链路的站点的行为的措施的通知信息。其中，通知信息可以包括但不限于以下信息至少之一：是否允许对等站点自由选择直连标识的指示；是否要求对等站点通知主节点直连链路建立情况的指示；直连链路的资源使用限制信息。
其中，传输模块802可以配置为：
如果传输模块自身所在节点发送的是单用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息；在示例性实施方式中，为了提高第一信令域的可靠性，可以设置两个或两个以上第一信令域即重复第一信令域；
如果传输模块自身所在节点发送的是多用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息，在无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；
如果传输模块自身所在节点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到触发帧的多个其他对等站点中的至少一个会返回触发格式无线帧，在触发格式无线帧帧头的 第一信令域中指示直连控制信息。
上述无线帧或触发格式无线帧为HE格式无线帧，还可以包含用于后向兼容以前的传统的WLAN设备的传统训练域和传统信令域，并且通过重复传统信令域以确定无线帧采用HE帧格式。
本发明实施例还提供一种节点，至少包括传输模块802，配置为利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
其中，节点为次节点或主节点。
在示例性实施方式中，传输模块802可以配置为：
当所述传输模块自身所在节点发送的是单用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息；
当所述传输模块自身所在节点发送的是多用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息，在无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；
当所述传输模块自身所在节点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到触发帧的多个其他对等站点中的至少一个会返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示直连控制信息。
上述的无线帧或所述触发格式无线帧为HE格式无线帧。
其中，直连控制信息包括以下至少之一：直连链路的直连标识、直连链路的传输方向值。其中，直连标识为直连链路使用的网络标识。
当节点为主节点时，直连链路的传输方向值指示为上行；当节点为次节点时，直连链路的传输方向值指示为下行。
此外，本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现上述的直连链路的建立方法。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被处理器执行时实现上述的直连链路实现数据传输的方法。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理单元的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些组件或所有组件可以被实施为由处理器，如数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。
以上所述，仅为本申请的示例性实例而已，并非用于限定本申请的保护范围。凡在本申请的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。
工业实用性
本申请实施例提供一种直连链路的建立方法及其实现数据传输的方法和节点，实现了对直连链路的建立和传输过程进行优化，使得直连链路很好地区别于基础网络架构的链路，从而提高了网络效率。

Claims (50)

  1. 一种直连链路的建立方法，包括：
    第一节点与第二节点之间建立直连链路，并按照预先设置的直连控制信息确定策略，确定建立好的直连链路对应的直连控制信息。
  2. 根据权利要求1所述的建立方法，其中，所述直连控制信息确定策略为所述第一节点与所述第二节点之间协商确定；所述建立方法包括：
    所述第一节点向所述第二节点发送直连链路请求帧，所述直连链路请求帧中携带有所述第一节点可用的一个或多个直连控制信息(200)；
    所述第一节点接收来自所述第二节点的直连链路响应帧，所述直连链路响应帧中携带有所述第二节点可用的一个或多个直连控制信息(201)；
    所述第一节点向所述第二节点发送直连链路确认帧，所述直连链路确认帧中携带有确定出的直连链路使用的直连控制信息(202)。
  3. 根据权利要求2所述的建立方法，该建立方法还包括：所述第一节点根据自身可用的一个或多个直连控制信息，以及所述第二节点可用的一个或多个直连控制信息，确定所述建立的直连链路使用的直连控制信息。
  4. 根据权利要求2所述的建立方法，其中，所述第一节点和所述第二节点为次节点；
    所述直连链路请求帧、所述直连链路响应帧、所述直连链路确认帧均通过所述第一节点和所述第二节点关联的主节点进行中转。
  5. 根据权利要求2所述的建立方法，其中，所述第一节点和所述第二节点为次节点；该建立方法还包括：
    所述第一节点向其关联的主节点发送通知帧，在通知帧中包括以下信息的任意组合：所述直连链路建立完成指示、建立的所述直连链路的直连标识、所述直连链路传输的业务特性、所述直连链路的信道接入方式。
  6. 根据权利要求5所述的建立方法，所述主节点收到所述通知帧后，该建立方法还包括：
    所述第一节点接收来自所述主节点的通知确认帧，在通知确认帧中至少 包括以下信息之一：给所述直连链路分配的直连标识、指定所述直连链路的信道接入方式和信道接入参数。
  7. 根据权利要求1所述的建立方法，其中，所述直连控制信息确定策略为：将预先设置好的直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息；所述建立方法包括：
    所述第一节点与所述第二节点间建立直连链路，并将预先设置的直连链路所使用的直连控制信息确定为建立好的直连链路的直连控制信息。
  8. 根据权利要求1所述的建立方法，其中，所述第一节点和所述第二节点为次节点；所述直连控制信息确定策略为：建立好的直连链路对应的直连控制信息为由与所述第一节点和第二节点关联的主节点确定的直连控制信息；所述建立方法包括：
    所述第一节点与所述第二节点间建立直连链路；
    所述第一节点与所述第二节点从所述主节点广播一个以上直连标识中确定一个直连标识作为所述直连控制信息中的直连标识；或者，所述第一节点与所述第二节点将所述主节点分配的直连标识作为所述直连控制信息中的直连标识；或者，所述第一节点和所述第二节点将所述主节点通知的根据基础网络架构的网络标识或主节点的设备标识确定的直连标识作为所述直连控制信息中的直连标识；或者，所述第一节点和所述第二节点未接收到来自所述第一节点和所述第二节点关联的所述主节点的通知时，将预先设置的保留的值作为直连控制信息中的直连标识。
  9. 根据权利要求1、2、7或8所述的建立方法，其中，所述直连控制信息包括以下至少之一：所述直连链路的直连标识、所述直连链路的传输方向值。
  10. 根据权利要求9所述的建立方法，其中，所述直连标识为直连链路使用的网络标识。
  11. 根据权利要求9所述的建立方法，其中，当所述第一节点和所述第二节点为主节点时，所述直连链路的传输方向值指示为上行；
    当所述第一节点和所述第二节点为次节点时，所述直连链路的传输方向 值指示为下行。
  12. 根据权利要求9所述的建立方法，所述确定所述直连控制信息中的直连标识之前，所述建立方法还包括：
    所述第一节点或所述第二节点或主节点通过对无线信道中传输的无线帧进行检查，确定其他网络或基本服务集BSS已经使用的基础网络架构的网络标识，以及确定其他直连链路已占用的网络标识。
  13. 根据权利要求9所述的建立方法，所述直连链路建立之后，所述建立方法还包括：
    所述第一节点或第二节点根据网络状况更改所述直连链路对应的直连标识。
  14. 根据权利要求1、2、7或8所述的建立方法，该建立方法还包括：
    所述第一节点或所述第二节点接收来自主节点的携带有用于控制直连链路的站点的行为的措施的通知信息。
  15. 根据权利要求14所述的建立方法，其中，所述通知信息包括以下信息至少之一：是否允许对等站点自由选择直连标识的指示；是否要求对等站点通知主节点直连链路建立情况的指示；直连链路的资源使用限制信息。
  16. 根据权利要求1、2、7或8所述的建立方法，其中，所述第一节点与第二节点为对等站点。
  17. 根据权利要求16所述的建立方法，该建立方法还包括：对等站点利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
  18. 根据权利要求17所述的建立方法，其中，所述对等站点为次节点或主节点。
  19. 根据权利要求17所述的建立方法，其中，所述在无线帧中携带直连控制信息包括：
    所述对等站点发送的是单用户格式无线帧，在所述无线帧帧头的第一信令域中指示所述直连控制信息；或者，
    所述对等站点发送的是多用户格式无线帧，在所述无线帧帧头的第一信 令域中指示所述直连控制信息，在所述无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；或者，
    所述对等站点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到所述触发帧的多个其他对等站点中的至少一个返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示所述直连控制信息。
  20. 根据权利要求19所述的建立方法，其中，所述无线帧或所述触发格式无线帧为高效HE格式无线帧。
  21. 一种直连链路实现数据传输的方法，包括：对等站点利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
  22. 根据权利要求21所述的方法，其中，所述对等站点为次节点或主节点。
  23. 根据权利要求21所述的方法，其中，所述在无线帧中携带直连控制信息包括：
    所述对等站点发送的是单用户格式无线帧，在所述无线帧帧头的第一信令域中指示所述直连控制信息；或者，
    所述对等站点发送的是多用户格式无线帧，在所述无线帧帧头的第一信令域中指示所述直连控制信息，在所述无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；或者，
    所述对等站点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到所述触发帧的多个其他对等站点中的至少一个返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示所述直连控制信息。
  24. 根据权利要求23所述的方法，其中，所述无线帧或所述触发格式无线帧为高效HE格式无线帧。
  25. 根据权利要求21、22或23所述的方法，其中，所述直连控制信息包括以下至少之一：所述直连链路的直连标识、所述直连链路的传输方向值。
  26. 根据权利要求25所述的方法，其中，所述直连标识为直连链路使用 的网络标识。
  27. 根据权利要求25所述的方法，其中，当所述对等站点为主节点时，所述直连链路的传输方向值指示为上行；
    当所述对等站点为次节点时，所述直连链路的传输方向值指示为下行。
  28. 一种节点，包括建立模块(800)、确定模块(801)；其中，
    建立模块(800)，配置为建立与自身所在节点为对等站点的节点之间的直连链路；
    确定模块(801)，配置为按照预先设置的直连控制信息确定策略，确定建立好的直连链路对应的直连控制信息。
  29. 根据权利要求28所述的节点，所述节点还包括：传输模块(802)，配置为利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
  30. 根据权利要求28所述的节点，其中，
    所述确定模块(801)配置为：当所述直连控制信息确定策略为对等站点间协商确定时，通知所述建立模块(800)；
    所述建立模块(800)配置为：在建立与自身所在节点为对等站点的节点之间的直连链路的过程中协商出所述直连控制信息。
  31. 根据权利要求30所述的节点，其中，所述建立模块(800)配置为：向与自身所在节点为对等站点的节点发送直连链路请求帧，所述直连链路请求帧中携带有自身所在节点可用的一个或多个直连控制信息；接收来自与自身所在节点为对等站点的节点的直连链路响应帧，所述直连链路响应帧中携带有与自身所在节点为对等站点的节点可用的一个或多个直连控制信息；向与自身所在节点为对等站点的节点发送直连链路确认帧，所述直连链路确认帧中携带有确定出的直连链路使用的直连控制信息。
  32. 根据权利要求31所述的节点，其中，当所述节点和与自身为对等站点的节点为次节点时，所述直连链路请求帧、所述直连链路响应帧、所述直连链路确认帧通过与所述节点关联的主节点进行中转。
  33. 根据权利要求31所述的节点，其中，所述传输模块(802)还配置为：向与自身所在节点关联的主节点发送通知帧，在通知帧中包括以下信息 的任意组合：直连链路建立完成指示、建立的直连链路的直连标识、直连链路传输的业务特性、直连链路的信道接入方式。
  34. 根据权利要求33所述的节点，其中，所述传输模块(802)还配置为：接收来自自身所在节点关联的主节点的通知确认帧，在通知确认帧中至少包括以下信息之一：给所述直连链路分配的直连标识、指定所述直连链路的信道接入方式和信道接入参数。
  35. 根据权利要求28或30所述的节点，其中，所述确定模块(801)还配置为：所述直连链路建立后，根据网络状况更改建立好的所述直连链路对应的直连控制信息的直连标识。
  36. 根据权利要求28所述的节点，其中，当所述直连控制信息确定策略为将预先设置的直连链路所使用的直连控制信息确定为建立好的直连链路对应的直连控制信息时，所述确定模块(801)配置为：
    将预先设置的直连链路所使用的直连控制信息确定为已建立的所述直连链路对应的直连控制信息。
  37. 根据权利要求28所述的节点，其中，当所述节点以及与该节点为对等站点的节点为次节点，且所述直连控制信息确定策略为已建立的直连链路对应的直连控制信息为由主节点确定的直连控制信息时，所述确定模块(801)配置为：
    将来自与自身所在节点关联的主节点的直连控制信息确定为已建立的直连链路对应的直连控制信息。
  38. 根据权利要求37所述的节点，其中，所述来自与自身所在节点关联的主节点的直连控制信息包括：所述主节点广播直连标识，或所述主节点分配直连标识，或所述主节点根据基础网络架构的网络标识或所述主节点自身的设备标识确定所述直连控制信息中的直连标识。
  39. 根据权利要求28、30或37所述的节点，其中，所述确定模块(801)还配置为：通过对无线信道中传输的无线帧进行检查，确定其他网络或基本服务集BSS已经使用的基础网络架构的网络标识，以及确定其他直连链路已占用的网络标识。
  40. 根据权利要求28、30、36或37所述的节点，其中，所述确定模块(801)还配置为：
    接收来自与自身所在节点关联的主节点的携带有用于控制直连链路的站点的行为的措施的通知信息。
  41. 根据权利要求40所述的节点，其中，所述通知信息包括以下信息至少之一：是否允许所述对等站点自由选择直连标识的指示；是否要求所述对等站点通知主节点直连链路建立情况的指示；所述直连链路的资源使用限制信息。
  42. 根据权利要求39所述的节点，其中，所述传输模块(803)配置为：
    当所述传输模块自身所在节点发送的是单用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息；
    当所述传输模块自身所在节点发送的是多用户格式无线帧，在无线帧帧头的第一信令域中指示所述直连控制信息，在无线帧帧头的第二信令域中指示一个或多个接收无线帧的目标对等站点的标识；
    当所述传输模块自身所在节点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到触发帧的多个其他对等站点中的至少一个会返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示所述直连控制信息。
  43. 根据权利要求42所述的节点，其中，所述无线帧或所述触发格式无线帧为高效HE格式无线帧。
  44. 一种节点，包括传输模块，配置为利用建立的直连链路传输无线帧，且在无线帧中携带直连控制信息。
  45. 根据权利要求44所述的节点，其中，所述节点为次节点或主节点。
  46. 根据权利要求44所述的节点，其中，所述传输模块配置为：
    当所述传输模块自身所在节点发送的是单用户格式无线帧，在无线帧帧头的第一信令域中指示直连控制信息；
    当所述传输模块自身所在节点发送的是多用户格式无线帧，在无线帧帧头的第一信令域中指示所述直连控制信息，在无线帧帧头的第二信令域中指 示一个或多个接收无线帧的目标对等站点的标识；
    当所述传输模块自身所在节点发送触发帧给多个建立直连链路的其他对等站点以通知其发送数据给发起触发帧的对等站点时，接收到触发帧的多个其他对等站点中的至少一个会返回触发格式无线帧，在触发格式无线帧帧头的第一信令域中指示所述直连控制信息。
  47. 根据权利要求46所述的节点，其中，所述无线帧或所述触发格式无线帧为高效HE格式无线帧。
  48. 根据权利要求44、45或46所述的节点，其中，所述直连控制信息包括以下至少之一：所述直连链路的直连标识、所述直连链路的传输方向值。
  49. 根据权利要求48所述的节点，其中，所述直连标识为直连链路使用的网络标识。
  50. 根据权利要求48所述的节点，其中，当所述节点为主节点时，所述直连链路的传输方向值指示为上行；
    当所述节点为次节点时，所述直连链路的传输方向值指示为下行。
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