WO2016187836A1 - 信道接入方法、接入点及站点 - Google Patents

信道接入方法、接入点及站点 Download PDF

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Publication number
WO2016187836A1
WO2016187836A1 PCT/CN2015/079915 CN2015079915W WO2016187836A1 WO 2016187836 A1 WO2016187836 A1 WO 2016187836A1 CN 2015079915 W CN2015079915 W CN 2015079915W WO 2016187836 A1 WO2016187836 A1 WO 2016187836A1
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Prior art keywords
idle
station
idle channel
bandwidth
channel
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PCT/CN2015/079915
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English (en)
French (fr)
Inventor
林英沛
蓝洲
李云波
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华为技术有限公司
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Priority to PCT/CN2015/079915 priority Critical patent/WO2016187836A1/zh
Publication of WO2016187836A1 publication Critical patent/WO2016187836A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the embodiments of the present invention relate to a communication technology, and in particular, to a channel access method, an access point (AP), and a station (Station, referred to as STA).
  • AP access point
  • STA station
  • D2D device to device
  • Direct communication between a site and a site that does not pass through an AP in Wireless Local Area Networks is a form of D2D.
  • the D2D transmission referred to in the present invention represents direct communication between a station and a station in a WLAN.
  • the station participating in the D2D transmission in the WLAN uses the carrier-Sense Multiple Access/Collision Avoidance (CSMA/CA) method with collision avoidance to compete with the non-directly transmitted station to use the same channel.
  • CSMA/CA carrier-Sense Multiple Access/Collision Avoidance
  • the transmission establishes a basic service set (BSS) data transmission for the AP.
  • BSS basic service set
  • the D2D transmission directly occupies the entire channel, so that the indirect transmission cannot use the channel, or once After the directly transmitted station contends to the channel, the D2D transmission cannot use the channel, so the channel resources cannot be reasonably utilized, thereby reducing the total capacity of the communication network.
  • Embodiments of the present invention provide a channel access method, an access point, and a station. Therefore, channel resources can be utilized reasonably and fully, thereby increasing the capacity of the communication network.
  • an embodiment of the present invention provides a channel access method, which is applied to a wireless local area network.
  • the WLAN is characterized in that: the access point AP receives the resource request message sent by the station, and the resource request message carries at least one of the following parameters: a quality of service QoS parameter, a cached data size of the site, where the site is the initiating device to the device D2D a station for transmitting; the AP determines, according to at least one of a service load quantity of the basic service set BSS, a QoS parameter, and a cache data size of the station, to allocate an idle channel of the AP to the station, where the idle channel is an idle bandwidth.
  • the AP sends a resource response message to the station, so that the station performs data transmission on the idle bandwidth of the highest priority idle channel according to the resource response message, where the resource response message carries the priority
  • the resource response message carries the priority
  • the identifier of the highest idle channel and the duration of the idle channel with the highest priority; or the resource response message carries the duration of the idle channel with the highest priority.
  • the method further includes: receiving, by the AP, a priority of the at least one of the idle channels that is detected by the station; and determining, by the AP, the priority The highest free channel identifier.
  • the AP is in accordance with a traffic load of the basic service set BSS
  • At least one of the QoS parameter and the cached data size of the site determines that the AP is allocated an idle channel of the AP, and specifically includes: if the QoS parameter is a throughput requirement, determining the following three conditions Whether at least one of the conditions is met, the three conditions include: whether the service load of the basic service set BSS is greater than a first preset value, whether the requested QoS parameter is greater than a second preset value, and the site Whether the cached data size is greater than a third preset value, if yes, the AP determines to allocate the idle channel to the station, where the first preset value is equal to a maximum service load of the BSS, The second preset value is equal to the maximum throughput of the AP on the bandwidth of establishing the BSS, and the third preset value
  • the resource response message is carried in The high efficiency signaling field HE-SIG-B in the physical layer protocol data unit PPDU sent by the AP to the station, or the resource response message carrying the payload payload of the downlink subframe DL subframe of the PPDU in.
  • the resource response message is carried in In a beacon frame, the duration is an interval of two Beacon frames or an integer multiple of the interval.
  • the AP further includes: the AP receiving the prompt information sent by the site, where the prompt information is used to indicate that the site is already in the Data transfer is in progress or completed on the idle channel.
  • the embodiment of the present invention provides a channel access method, including: a device that sends a resource request message from an initiating device to a device D2D to an access point AP, where the resource request message carries at least one of the following parameters: a service a quality QoS parameter, the cached data size of the site, so that the AP determines, according to at least one parameter of a traffic load of the basic service set BSS, the QoS parameter, and a cache data size of the site, to the
  • the station allocates an idle channel of the AP, where the idle channel is a channel with an idle bandwidth; the station receives a resource response message sent by the AP, where the resource response message carries an identifier of the idle channel with the highest priority.
  • the duration of the idle channel with the highest priority; or the resource response message carries the duration of the idle channel with the highest priority; the station has the highest priority according to the resource response message.
  • Data transmission is performed on the idle bandwidth of the idle channel.
  • the method further includes: determining, by the station, a priority of the at least one of the idle channels; the station sending the priority to the AP, so that The AP determines an identity of the idle channel with the highest priority.
  • the determining, by the station, the priority of the at least one of the idle channels specifically: the idle The ratio of the idle bandwidth of the channel is higher, and the ratio of the idle bandwidth is the ratio of the idle bandwidth of the idle channel to the total bandwidth.
  • the method further includes: sending, by the station, the prompt information to the AP, The prompt information is used to indicate that the station has completed or completed data transmission on the idle channel.
  • the carrier sense multi-point access/collision avoidance mode is used to compete for data transmission.
  • an embodiment of the present invention provides an access point AP, including: a receiving module, configured to receive a resource request message sent by a station, where the resource request message carries at least one of the following parameters: a quality of service QoS parameter, a cached data size of the site, wherein the site is a site that initiates device-to-device D2D transmission; and a determining module, configured to determine, according to a traffic load of the basic service set BSS, the QoS parameter, and a cache data size of the site At least one of the parameters determining to allocate the idle channel of the AP to the station, the idle channel is a channel having an idle bandwidth, and a sending module, configured to send a resource response message to the station, so that the site is The resource response message carries data transmission on the idle bandwidth of the highest priority idle channel, where the resource response message carries the identifier of the highest priority idle channel and the duration of the idle channel with the highest priority; or And the resource response message carries a duration of occupy
  • the receiving module is further configured to receive a priority of the at least one of the idle channels that is detected by the site; An identifier for determining the highest priority idle channel.
  • the determining module is specifically configured to: if the QoS parameter is a throughput requirement, determine whether at least one of the following three conditions is met, the third The condition includes: whether the service load of the basic service set BSS is greater than a first preset value, whether the requested QoS parameter is greater than a second preset value, and whether the cached data size of the site is greater than a third preset value.
  • the determining module determines to allocate the idle channel to the station, where the first preset value is equal to a maximum service load of the BSS, and the second preset value is equal to the AP Establishing a maximum throughput on a bandwidth of the BSS, where the third preset value is equal to a maximum available bandwidth of the AP on a bandwidth for establishing the BSS; if the QoS parameter is a delay requirement, determining the following three Whether at least one of the conditions is met, the three conditions include: whether the service load of the basic service set BSS is greater than a first preset value, whether the requested QoS parameter is less than a fourth preset value, and station Whether the size of the cached data of the point is greater than a third preset value, if yes, the determining module determines to allocate the idle channel to the station, and the fourth preset value is equal to the bandwidth of the AP in establishing the BSS The minimum achievable delay.
  • the resource response message is carried in The high efficiency signaling field HE-SIG-B in the physical layer protocol data unit PPDU sent by the AP to the station, or the resource response message carrying the payload payload of the downlink subframe DL subframe of the PPDU in.
  • the resource response message is carried in In a beacon frame, the duration is an interval of two Beacon frames or an integer multiple of the interval.
  • the receiving module is further configured to: receive prompt information sent by the station, where the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • the embodiment of the present invention provides a site, where the site is a device that initiates device-to-device D2D transmission, and includes: a sending module, configured to send a resource request message to the access point AP, where the resource request message carries the following At least one of the parameters: a quality of service QoS parameter, the slowness of the site Storing a data size, so that the AP determines, according to at least one of a service load quantity of the basic service set BSS, the QoS parameter, and a cache data size of the station, to allocate an idle channel of the AP to the station.
  • a sending module configured to send a resource request message to the access point AP, where the resource request message carries the following At least one of the parameters: a quality of service QoS parameter, the slowness of the site Storing a data size, so that the AP determines, according to at least one of a service load quantity of the basic service set BSS, the QoS parameter, and a cache data size of the station, to
  • the idle channel is a channel with an idle bandwidth
  • the receiving module is configured to receive a resource response message sent by the AP, where the resource response message carries the identifier of the idle channel with the highest priority and the priority occupied by the The duration of the highest idle channel; or the resource response message carries the duration of the idle channel with the highest priority; the transmission module is configured to idle the idle channel with the highest priority according to the resource response message Data transmission over bandwidth.
  • the method further includes: a determining module, configured to determine a priority of the at least one of the idle channels; and the sending module sends the priority to the AP So that the AP determines the identity of the highest priority idle channel.
  • the determining module is configured to: when a ratio of idle bandwidth of the idle channel is larger, corresponding to the priority The higher the level; wherein the idle bandwidth ratio is a ratio of the idle bandwidth of the idle channel to the total bandwidth.
  • the sending module is further configured to: send to the AP
  • the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • the transmission module is specifically used And: performing data transmission by using a carrier sense multi-point access/collision avoidance mode on the idle bandwidth of the idle channel according to the resource response message and the station that initiates the another D2D transmission.
  • an embodiment of the present invention provides an access point AP, including: a receiver, configured to receive a resource request message sent by a station, where the resource request message carries at least one of the following parameters: a quality of service QoS parameter, The size of the cached data of the site, wherein the site is a site that initiates device-to-device D2D transmission; the processor is configured to use a traffic load of the basic service set BSS, the QoS parameter, and a cached data size of the site according to the basic service set At least one of the parameters determining to allocate an idle channel of the AP to the station, the idle channel being a channel having an idle bandwidth; a transmitter, And sending, by the station, a resource response message, so that the station performs data transmission on the idle bandwidth of the highest priority idle channel according to the resource response message, where the resource response message carries the highest priority idle The identifier of the channel and the duration of the idle channel with the highest priority; or the resource response message carries the duration of the idle channel
  • the receiver is further configured to receive a priority of the at least one of the idle channels that is detected by the station; An identifier for determining the highest priority idle channel.
  • the processor is specifically configured to: if the QoS parameter For the throughput requirement, it is determined whether at least one of the following three conditions is met, the three conditions include: whether the service load of the basic service set BSS is greater than the first preset value, and whether the requested QoS parameter is Whether the greater than the second preset value and the cache data size of the station is greater than a third preset value, if yes, the processor determines to allocate the idle channel to the station, where the first preset value Equal to the maximum traffic load of the BSS, the second preset value is equal to the maximum throughput of the AP on the bandwidth of establishing the BSS, and the third preset value is equal to the AP is establishing the BSS The maximum available bandwidth on the bandwidth; if the QoS parameter is a delay requirement, it is determined whether at least one of the following three conditions is met, the three conditions include: whether the service load of the basic service set BSS is greater than the first preset value, and whether the requested QoS parameter is Whether the greater than the second preset
  • the resource response message is carried in The high efficiency signaling field HE-SIG-B in the physical layer protocol data unit PPDU sent by the AP to the station, or the resource response message carrying the payload payload of the downlink subframe DL subframe of the PPDU in.
  • the resource response message is carried in a beacon Beacon frame, where the duration is an interval time of the two Beacon frames or the interval time Integer multiple.
  • the receiver is further configured to: receive prompt information sent by the station, where the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • an embodiment of the present invention provides a site, where the site is a device that initiates a device to device D2D transmission, and includes: a sender, configured to send a resource request message to the access point AP, where the resource request message carries the following At least one of the parameters: a quality of service QoS parameter, a cached data size of the site, such that the AP is in accordance with a traffic load of the basic service set BSS, the QoS parameter, and a cached data size of the site Determining, by the at least one parameter, an idle channel to which the AP is allocated, the idle channel being a channel having an idle bandwidth, and a receiver, configured to receive a resource response message sent by the AP, where the resource response message carries the The identifier of the highest-priority idle channel and the duration of the idle channel with the highest priority; or the resource response message carries the duration of the idle channel with the highest priority; the processor is configured to perform The resource response message performs data transmission on the idle
  • the processor is further configured to determine a priority of the at least one of the idle channels, where the transmitter is further configured to send to the AP The priority is such that the AP determines an identifier of the idle channel with the highest priority.
  • the processor is configured to: the greater the proportion of the idle bandwidth of the idle channel, the corresponding priority The higher the level; wherein the idle bandwidth ratio is a ratio of the idle bandwidth of the idle channel to the total bandwidth.
  • the transmitter is further configured to: send to the AP
  • the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • the processor is configured to: initiate, according to the resource response message, the idle bandwidth of the idle channel A D2D transmission site competes for data transmission using carrier sense multipoint access/collision avoidance.
  • the embodiment of the present invention provides a channel access method, an access point, and a station.
  • the channel access method provided by the embodiment of the present invention accesses the D2D transmission to the idle channel, and the idle channel only needs to have an idle bandwidth.
  • the idle bandwidth is rationally utilized.
  • the D2D transmission is accessed to the idle channel with the highest priority, thereby more rationally utilizing the channel resources, thereby increasing the capacity of the communication network.
  • FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present invention.
  • FIG. 2 is a flowchart of a channel access method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of channel access of a D2D transmission according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram 1 of channel access for D2D transmission according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram 2 of channel access of D2D transmission according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram 3 of channel access for D2D transmission according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a discontinuous D2D channel access according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a channel access method according to another embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an access point AP according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a station according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of an access point AP according to another embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a station according to another embodiment of the present invention.
  • the technical solution of the present invention is built on the WLAN technology.
  • the scheme is proposed based on Orthogonal Frequency-Division Multiple Access (OFDMA) technology, where OFDMA technology is an evolution of OFDM technology.
  • OFDMA technology is an evolution of OFDM technology.
  • a transmission technique of transmitting data is loaded on a part of the sub-carriers. Since the sites participating in the D2D transmission in the prior art compete with the non-directly transmitted sites through the CSMA/CA mode, the same channel is used. As a result, channel resources cannot be reasonably utilized, and the capacity of the communication network is reduced.
  • the present invention provides a channel access method, an access point, and a station.
  • FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present invention.
  • STA 101, STA 102, and STA 103 are all associated with AP 100.
  • the Basic Service Set (BSS) established by the AP 100 operates with a scheduled channel access mechanism.
  • the AP 100 is responsible for scheduling and allocating transmission resources.
  • a normal link AP to STA or STA to AP
  • a direct link ie, D2D transmission between STAs and STAs
  • the STA 101 and the STA 102 belong to the D2D communication
  • the STA 103 and the AP 100 belong to the normal link communication, that is, the STA 103 and the AP 100 adopt the indirect transmission mode.
  • FIG. 2 is a flowchart of a channel access method according to an embodiment of the present invention.
  • the method is applicable to a wireless local area network (WLAN).
  • WLAN wireless local area network
  • the method is implemented as an access point AP.
  • the method specifically includes The following process:
  • the access point AP receives the resource request message sent by the station, where the resource request message carries at least one of the following parameters: a quality of service (QoS) parameter, and a cached data size of the site, where the site is a device to the device. D2D transmission site;
  • QoS quality of service
  • the station obtains an idle channel suitable for the station transmission by sending a resource request message to the AP, where the resource request message carries at least one of a quality of service QoS parameter and a cached data size of the site, where the QoS parameter may be a throughput requirement or Delay requirements, etc.
  • the present invention does not limit the content included in the QoS parameters.
  • the AP determines, according to at least one parameter of the service load quantity, the QoS parameter, and the cache data size of the basic service set BSS, the AP allocates an idle channel of the AP to the station, where the idle channel is a channel with an idle bandwidth;
  • the idle channel there are two cases for the idle channel: the first one: the entire channel bandwidth is idle state, for example, the total channel bandwidth is 80 MHz (Mega Hertz, referred to as MHz), and the 80 MHz is all idle state; the second: the whole Some of the bandwidth in the channel is idle, and the remaining part of the bandwidth is busy.
  • the total bandwidth of the channel is 80 MHz (Mega Hertz, MHz for short), 20 MHz is idle, and the remaining 60 MHz is busy.
  • the load quantity may be the amount of service traffic currently being performed by the BSS, and may be determined by counting the number of service transmission stations in the BSS or counting the number of data transmission packets or the packet loss rate, duty ratio, and the like.
  • An optional method if the QoS parameter is a throughput requirement, determining whether at least one of the following three conditions is met, where the three conditions include: whether the service load of the basic service set BSS is greater than the first preset. Whether the value, the requested QoS parameter is greater than the second preset value, and whether the cached data size of the site is greater than a third preset value; if yes, the AP determines to allocate an idle channel to the station, where the first preset value is equal to the maximum service of the BSS The second predetermined value is equal to the maximum throughput of the AP on the bandwidth of the BSS. The third preset value is equal to the maximum available bandwidth of the AP on the BSS bandwidth. For example, if the above conditions are met, the AP may be The stations participating in the D2D allocate AP idle channels.
  • the QoS parameter is a delay requirement
  • the three conditions include: whether the service load of the basic service set BSS is greater than the first pre-predetermined Whether the value, the requested QoS parameter is less than the fourth preset value, and whether the cached data size of the site is greater than a third preset value, and if yes, the AP allocates a free channel to the station.
  • the first preset value, the second preset value, the third preset value, and the fourth preset value are presets corresponding to the service load amount, the throughput requirement, the cache data size, and the delay requirement, respectively.
  • the value, wherein the fourth preset value is equal to the achievable minimum delay of the AP in establishing the bandwidth of the BSS.
  • the AP sends a resource response message to the station, so that the station performs data transmission on the idle bandwidth of the highest priority idle channel according to the resource response message, and the resource response message carries the identifier of the idle channel with the highest priority and the highest priority.
  • the duration of the idle channel; or, the resource response message carries the duration of the idle channel with the highest priority.
  • the AP when the AP determines that the AP idle channel can be allocated to the site, the AP sends a resource response message to the site, where the resource response message may be different in two different scenarios.
  • the first scenario performing D2D transmission.
  • the station may notify the AP of the capability information such as the bandwidth and the frequency band that it supports, and then send the priority of the idle channel that is heard to the AP.
  • the idle bandwidth ratio is the idle bandwidth of the idle channel.
  • the AP determines the identity of the highest priority idle channel.
  • the resource response message carries the identifier of the idle channel with the highest priority and the duration of the idle channel with the highest priority; the second scenario: the priority of the idle channel that the station will hear is not sent to the AP, but The two stations of the D2D transmission can negotiate the capability information of both parties and listen to the priority of the idle channel. Finally, the idle channel with the highest priority is determined as the default channel. In this case, the resource response message carries only the highest priority. The duration of the idle channel, and as a trigger condition, once the D2D transmission site receives the resource response message, they will perform data transmission on the default idle channel.
  • the method for determining the priority of the idle channel may be determined by the following method, in addition to the ratio of the idle bandwidth, for example, the smaller the interference to the idle channel of the AP, the higher the priority, or the idle channel. The shorter the distance from the current transmission channel of the AP, the higher the priority of the idle channel.
  • the priority of the idle channel can also be determined by the foregoing three, and the present invention does not limit this.
  • the resource response message carries a High Efficiency Signal B (High Efficiency Signal B, referred to as HE-SIG-B) in a Physical Protocol Data Unit (PPDU) sent by the AP to the station.
  • HE-SIG-B High Efficiency Signal B
  • PPDU Physical Protocol Data Unit
  • the resource response message is carried in a payload of a Downlink (DL) subframe of the PPDU.
  • FIG. 3 is a schematic diagram of channel access for D2D transmission according to an embodiment of the present invention. As shown in FIG. 3, a channel for D2D transmission is different from a channel for an AP to send or receive a PPDU, that is, D2D is on an idle channel, and an AP is performing D2D.
  • the resource response message sent by the transmitted station may be carried in the HE-SIG-B field, where the HE-SIG-B is carried in a High Efficiency WLAN (HEW) signaling field, of course, the resource response message is also It can be carried in the payload of the downlink DL subframe.
  • HEW High Efficiency WLAN
  • FIG. 4 is a channel access for D2D transmission according to an embodiment of the present invention. As shown in FIG. 4, the D2D transmission may be ended at the end of the scheduling window, wherein the radio frame (RF) shown in FIG. 4 is scheduled and transmitted in the scheduling window, where the scheduling window refers to The transmission time window when the AP interacts with those sites that are not directly transmitted.
  • FIG. 5 is a schematic diagram 2 of channel access of D2D transmission according to an embodiment of the present invention. As shown in FIG. 5, D2D transmission may be continued at the end of the scheduling window.
  • FIG. 4 is a channel access for D2D transmission according to an embodiment of the present invention. As shown in FIG. 5, D2D transmission may be continued at the end of the scheduling window.
  • FIG. 6 is a schematic diagram 3 of channel access of D2D transmission according to an embodiment of the present invention, as shown in FIG. 6 As shown, the D2D transmission ends with the transition time of the uplink subframe and the downlink subframe in one scheduling window, so that the site performing D2D transmission can return the content of the competition to the AP.
  • the embodiment of the present invention does not limit the D2D duration.
  • the resource response message is carried in the beacon Beacon frame.
  • the duration may be an interval of two Beacon frames or an integer multiple of the interval.
  • the location where the resource response message described above can be carried is not limited in the present invention.
  • the duration can also be carried in a legacy preamble or in a Network Allocation Vector (NAV) in a channel protection frame, such as Request To Send (RTS) or Clear To Send (Clear To Send, referred to as CTS, in the NAV in the Media Access Control (MAC) frame header.
  • NAV Network Allocation Vector
  • RTS Request To Send
  • CTS Clear To Send
  • MAC Media Access Control
  • the method further includes: the AP receiving the prompt information sent by the station, where the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • the AP can obtain the right to use the idle channel.
  • the AP can perform the next transmission with the above-mentioned site.
  • the next transmission may be an indirect transmission, but between the site and the AP. Transmission, that is, the interaction between sites goes through the AP.
  • FIG. 4 is a non-contiguous 160 MHz scene of 80+80 MHz, and the AP performs indirect transmission at the main 80 MHz. Scheduling transmission, and scheduling D2D transmission to the next 80MHz, and accessing in CSMA/CA mode, that is, the 80+80 MHz channel is an idle channel with idle bandwidth, and the second 80MHz is idle for the site that initiates D2D transmission. bandwidth.
  • the station performing D2D transmission can use the CSMA/CA method to compete for the data transmission using the sub-80MHz frequency band.
  • FIG. 7 is a schematic diagram of a discontinuous D2D channel access according to an embodiment of the present invention.
  • an AP establishes a BSS on a channel of an 80 MHz bandwidth, and only 60 MHz of the bandwidth is used for establishing an BSS by the AP at a certain time. Indirect transmission is only required on the 60MHz bandwidth, and the remaining 20MHz is available for D2D transmission.
  • the station performing D2D transmission and the station initiating another D2D transmission use CSMA/CA mode to compete for the remaining 20MHz bandwidth.
  • An embodiment of the present invention provides a channel access method, including: an access point AP receiving a resource request message sent by a station, where the resource request message carries at least one of the following parameters: a quality of service QoS parameter, a cached data size of the site, where the site a site for initiating D2D transmission; the AP is based on at least one of a service load amount of the basic service set BSS, a QoS parameter, and a cache data size of the site.
  • the parameter determines that the AP is allocated an idle channel of the AP, and the idle channel is a channel with an idle bandwidth; the AP sends a resource response message to the station, so that the station performs data transmission on the idle channel with the highest priority according to the resource response message, and the resource response message carries The identifier of the idle channel with the highest priority and the duration of the idle channel with the highest priority; or the resource response message carries the duration of the idle channel with the highest priority.
  • the channel provided by the embodiment of the present invention is connected.
  • the ingress method accesses the D2D transmission to the idle channel, and the idle channel only needs to have the idle bandwidth.
  • the D2D transmission station and the indirectly transmitted station contend for the channel resource, and once occupied, occupy the entire channel.
  • the idle bandwidth cannot be reasonably utilized.
  • the D2D transmission is accessed to the idle channel with the highest priority to utilize the channel resources reasonably, thereby improving the capacity of the communication network.
  • FIG. 8 is a flowchart of a channel access method according to another embodiment of the present invention. The method is performed by a station that initiates a D2D transmission. As shown in FIG. 8, the method includes the following processes:
  • the station that initiates the D2D transmission sends a resource request message to the access point AP, where the resource request message carries at least one of the following parameters: a quality of service QoS parameter, and a cached data size of the site, so that the AP is based on the basic service set BSS.
  • At least one of a traffic load, a QoS parameter, and a cached data size of the site determines an idle channel to which the AP is allocated to the station, and the idle channel is a channel having an idle bandwidth;
  • the station obtains a free channel suitable for the station transmission by sending a resource request message to the AP, where the resource request message carries at least one of a quality of service QoS parameter requested by the station and a cached data size of the site, where the QoS parameter may be throughput. Quantity requirements or delay requirements, etc.
  • the present invention does not limit the content included in the QoS parameters.
  • S802 The station receives the resource response message sent by the AP, where the resource response message carries the identifier of the idle channel with the highest priority and the duration of the idle channel with the highest priority. Alternatively, the resource response message carries the idle channel with the highest priority. duration;
  • the resource response message may be different in two different scenarios.
  • the first scenario the site performing the D2D transmission may notify the AP of the capability information such as the bandwidth and the frequency band it supports, and then at least the intercepted
  • the priority of an idle channel is sent to the AP.
  • the ratio of the idle bandwidth is the ratio of the idle bandwidth of the idle channel to the total bandwidth.
  • the AP determines the identity of the highest priority idle channel.
  • the resource response message carries the identifier of the idle channel with the highest priority and the duration of the idle channel with the highest priority.
  • the second scenario the priority of the idle channel detected by the site is not sent to the AP, but D2D is performed.
  • the two stations in the transmission can pre-negotiate the capability information of the two parties, and finally determine that the idle channel with the highest priority is the default channel.
  • the resource response message only carries the duration of the idle channel with the highest priority, and serves as a trigger condition. Once the site receives the resource response message, they will transmit data on the default channel.
  • S803 The station performs data transmission on the idle bandwidth of the highest priority idle channel according to the resource response message.
  • the station competes for the data transmission by using a carrier sense multiple access/collision avoidance (CSMA/CA) manner on the idle bandwidth of the idle channel according to the resource response message and the station that initiates another D2D transmission.
  • CSMA/CA carrier sense multiple access/collision avoidance
  • the station sends a prompt message to the AP, where the prompt information is used to indicate that the station has completed or completed data transmission on the idle channel.
  • the AP can obtain the right to use the idle channel.
  • the AP can perform the next transmission with the above-mentioned site.
  • the next transmission may be an indirect transmission, but between the site and the AP. Transmission, that is, the interaction between sites goes through the AP.
  • An embodiment of the present invention provides a channel access method, including: first, a site that initiates a D2D transmission sends a resource request message to an access point AP, where the resource request message carries at least one of the following parameters: a quality of service QoS parameter, and a cache of the site.
  • the data size is such that the AP determines, according to at least one of the service load quantity of the basic service set BSS, the QoS parameter, and the cache data size of the station, the AP is allocated an idle channel of the AP, and the idle channel is a channel having an idle bandwidth;
  • the station receives the resource response message sent by the AP, where the resource response message carries the identifier of the idle channel with the highest priority and the duration of the idle channel with the highest priority; or the resource response message carries the duration of the idle channel with the highest priority.
  • the station performs data transmission on the idle bandwidth of the highest priority idle channel according to the resource response message. Therefore, the D2D-enabled station can perform data transmission on the idle bandwidth of the idle channel, reasonably utilizes the channel resources, and improves the capacity of the communication network.
  • FIG. 9 is a schematic structural diagram of an access point AP according to an embodiment of the present invention.
  • the access point includes: a receiving module 901, configured to receive a resource request message sent by a station, and the resource request message carries At least one of the following parameters: a quality of service QoS parameter, a cached data size of the site, wherein the site is a site that initiates device-to-device D2D transmission; and a determining module 902 for serving traffic load and QoS parameters of the basic service set BSS And at least one of the site's cached data sizes
  • the parameter determines that the AP is allocated an idle channel of the AP, and the idle channel is a channel with an idle bandwidth;
  • the sending module 903 is configured to send a resource response message to the station, so that the station is on the idle bandwidth of the highest priority idle channel according to the resource response message.
  • the data transmission message carries the identifier of the idle channel with the highest priority and the duration of the idle channel with the highest priority.
  • the receiving module 901 is further configured to receive a priority of the at least one idle channel that is detected by the station, and the determining module 902 is further configured to determine an identifier of the idle channel with the highest priority.
  • the determining module 902 is specifically configured to: in the first case: “If the QoS parameter is a throughput requirement, determine whether at least one of the following three conditions is met, and the three conditions include: a service of the basic service set BSS Whether the load is greater than the first preset value, whether the requested QoS parameter is greater than the second preset value, and whether the cache data size of the site is greater than a third preset value.
  • the determining module 902 determines to allocate the idle channel to the station, where
  • the first preset value is equal to the maximum service load of the BSS
  • the second preset value is equal to the maximum throughput of the AP in establishing the bandwidth of the BSS
  • the third preset value is equal to the maximum available bandwidth of the AP on the bandwidth of establishing the BSS.
  • the QoS parameter is a delay requirement
  • the resource response message is carried in the HE-SIG-B in the physical layer protocol data unit PPDU sent by the AP to the station, or the resource response message is carried in the downlink subframe DL subframe of the PPDU.
  • the load in the payload.
  • the resource response message is carried in the beacon frame, and the duration is the interval between the two Beacon frames or an integer multiple of the interval.
  • the receiving module 901 is further configured to: receive prompt information sent by the station, where the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • the access point AP provided in this embodiment is used to implement the implementation of the channel access method corresponding to FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 10 is a schematic structural diagram of a site according to an embodiment of the present invention.
  • the site is a site that initiates device-to-device D2D transmission.
  • the site includes: a sending module 1001, configured to access a point.
  • the AP sends a resource request message, where the resource request message carries at least one of the following parameters: a quality of service QoS parameter, and a cached data size of the site, so that the AP according to the service load of the basic service set BSS, the QoS parameter, and the cached data of the site At least one parameter of the size determines the idle channel to which the AP is allocated to the station, and the idle channel is the channel with the idle bandwidth; the receiving module 1002 is configured to receive the resource response message sent by the AP, and the resource response message carries the identifier of the idle channel with the highest priority. The duration of the idle channel with the highest priority; or the resource response message carries the duration of the idle channel with the highest priority; the transmission module 1003 is configured to use the resource response message on the idle bandwidth of the highest priority idle channel. Data transfer.
  • the resource request message carries at least one of the following parameters: a quality of service QoS parameter, and a cached data size of the site, so that the AP according to the
  • the method further includes: a determining module 1004, configured to determine a priority of the at least one idle channel; and the sending module 1001 sends a priority to the AP, so that the AP determines an identifier of the idle channel with the highest priority.
  • the determining module 1004 is specifically configured to: the greater the ratio of the idle bandwidth of the idle channel, the higher the corresponding priority; wherein the ratio of the idle bandwidth is the ratio of the idle bandwidth of the idle channel to the total bandwidth.
  • the sending module 1001 is further configured to: send prompt information to the AP, where the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • the transmission module 1003 is specifically configured to: according to the resource response message, compete with the carrier that initiates another D2D transmission to perform data transmission by using a carrier sense multiple access/collision avoidance mode on the idle bandwidth of the idle channel.
  • the site provided in this embodiment is used to implement the implementation of the channel access method corresponding to FIG. 8.
  • the implementation principle and the technical effects are similar, and details are not described herein again.
  • FIG. 11 is a schematic structural diagram of an access point AP according to another embodiment of the present invention.
  • the access point includes: a receiver 1101, configured to receive a resource request message sent by a station, and a resource request message.
  • At least one of a parameter and a cached data size of the site determines an idle channel to which the AP is allocated to the station, the idle channel is a channel having an idle bandwidth, and the transmitter 1103 is configured to send a resource response message to the station, so that the station according to the resource response message
  • the data transmission is performed on the idle bandwidth of the idle channel with the highest priority
  • the resource response message carries the identifier of the idle channel with the highest priority and the duration of the idle channel with the
  • the receiver 1101 is further configured to receive a priority of the at least one idle channel that is detected by the station.
  • the processor 1102 is further configured to determine an identifier of the idle channel with the highest priority.
  • the ratio of the idle bandwidth of the idle channel is higher, and the ratio of the idle bandwidth is the ratio of the idle bandwidth of the idle channel to the total bandwidth.
  • the processor 1102 is specifically configured to: if the QoS parameter is a throughput requirement, determine whether at least one of the following three conditions is met, and the three conditions include: whether the service load of the basic service set BSS is greater than the first Whether the preset value, the requested QoS parameter is greater than the second preset value, and the cache data size of the site is greater than a third preset value. If yes, the processor 1102 determines to allocate an idle channel to the station, where the first preset value It is equal to the maximum traffic load of the BSS, and the second preset value is equal to the maximum throughput of the AP on the bandwidth of establishing the BSS, and the third preset value is equal to the maximum available bandwidth of the AP on the bandwidth of establishing the BSS.
  • the QoS parameter is a delay requirement, it is determined whether at least one of the following three conditions is met, the three conditions include: whether the service load of the basic service set BSS is greater than a first preset value, and the requested QoS Whether the parameter is smaller than the fourth preset value and the cache data size of the station is greater than a third preset value, and if so, the processor 1102 determines to allocate the idle channel to the station, the fourth preset The value is equal to the achievable minimum delay of the AP in establishing the bandwidth of the BSS.
  • the resource response message is carried in the HE-SIG-B in the physical layer protocol data unit PPDU sent by the AP to the station, or the resource response message is carried in the payload of the downlink subframe DL subframe of the PPDU. .
  • the resource response message is carried in the beacon frame, and the duration is the interval between the two Beacon frames or an integer multiple of the interval.
  • the receiver 1101 is further configured to: receive prompt information sent by the station, where the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • the access point AP provided in this embodiment is used to implement the implementation technical solution of the channel access method corresponding to FIG. 2, and the implementation principle and technical effects thereof are similar, and details are not described herein again.
  • FIG. 12 is a schematic structural diagram of a site according to another embodiment of the present invention.
  • the site is a site that initiates device-to-device D2D transmission.
  • the site includes: a transmitter 1201, configured to access The point AP sends a resource request message, and the resource request message carries at least one of the following parameters: a quality of service QoS parameter, a cached data size of the site, so that the AP is based on the basic service
  • At least one of a traffic load of the set BSS, a QoS parameter, and a cached data size of the site determines an idle channel to which the AP is allocated to the station, the idle channel is a channel having an idle bandwidth, and the receiver 1202 is configured to receive the resource response sent by the AP.
  • the message, the resource response message carries the identifier of the idle channel with the highest priority and the duration of the idle channel with the highest priority; or the resource response message carries the duration of the idle channel with the highest priority; the processor 1203 is configured to The resource response message performs data transmission on the idle bandwidth of the highest priority idle channel.
  • the processor 1203 is further configured to determine a priority of the at least one of the idle channels.
  • the transmitter 1201 is further configured to send the priority to the AP, so that the AP determines an identifier of the idle channel with the highest priority.
  • the processor 1203 is specifically configured to: the greater the ratio of the idle bandwidth of the idle channel, the higher the corresponding priority; wherein the ratio of the idle bandwidth is the ratio of the idle bandwidth of the idle channel to the total bandwidth.
  • the transmitter 1201 is further configured to: send prompt information to the AP, where the prompt information is used to indicate that the station has performed or completed data transmission on the idle channel.
  • the processor 1203 is specifically configured to: use a carrier sense multi-point access/collision avoidance mode to perform data transmission on a free bandwidth of the idle channel according to a resource response message, and a site that initiates another D2D transmission.
  • the site provided in this embodiment is used to implement the implementation of the channel access method corresponding to FIG. 8.
  • the implementation principle and the technical effects are similar, and details are not described herein again.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种信道接入方法、接入点及站点，其中该方法包括：接入点AP接收站点发送的资源请求消息；AP根据所在的基本服务集BSS的业务负载量、资源请求消息中的QoS参数和资源请求消息中的站点的缓存数据大小中的至少一个参数确定向站点分配AP的空闲信道；AP向站点发送资源响应消息，以使站点根据资源响应消息在优先级最高的空闲信道上进行数据传输，从而合理的利用了信道资源，进而提高了通信网络的容量。

Description

信道接入方法、接入点及站点 技术领域
本发明实施例涉及通信技术，尤其涉及一种信道接入方法、接入点(Access Point，简称AP)及站点(Station，简称STA)。
背景技术
随着通信设备数量的不断增长，信号在空中接口传输所用的频谱变得越来越拥挤，提升空口传输效率是无线通信所面临的关键问题之一。因此设备到设备(Device to Device，简称D2D)传输应运而生，它是指在无线网络中，实现两个通信设备间的直接通信连接，而无需像蜂窝或者无线保真(Wireless Fidelity，简称Wi-Fi)技术中的基础结构需要经过基站或者接入点进行中转，需要两次空口传输。通过对D2D通信技术的引入，由于节省了一次空口传输，移动网络的频谱利用效率就会提高，并且移动网络的容量也会得到提升。
在无线局域网(Wireless Local Area Networks，简称WLAN)中不经过AP中转的站点与站点之间的直接通信就是D2D的一种形式。为了便于描述，本发明中所指的D2D传输表示WLAN中的站点与站点之间的直接通信。WLAN中参与D2D传输的站点通过带碰撞避免的载波侦听多址访问/冲突避免(Carrier-Sense Multiple Access/Collision Avoidance,简称CSMA/CA)方式与非直接传输的站点竞争使用同一信道，非直接传输为AP建立基本服务集(Basic Service Set，简称BSS)的数据传输，一旦参与D2D传输的站点竞争到上述信道后，则D2D传输直接占据整个信道，使得非直接传输无法使用信道，或者一旦非直接传输的站点竞争到信道后，则D2D传输则无法使用信道，因此不能合理利用信道资源，从而降低了通信网络的总的容量。
发明内容
本发明实施例提供一种信道接入方法、接入点及站点。从而能够合理、充分利用信道资源，进而提高了通信网络的容量。
第一方面，本发明实施例提供一种信道接入方法，应用于无线局域网 WLAN，其特征在于，包括：接入点AP接收站点发送的资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量QoS参数，站点的缓存数据大小，其中站点为发起设备到设备D2D传输的站点；AP根据所在的基本服务集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个参数确定向站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；所述AP向所述站点发送资源响应消息，以使所述站点根据所述资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长。
结合第一方面，在第一方面的第一种可能实施方式中，还包括：所述AP接收所述站点侦听到的至少一个所述空闲信道的优先级；所述AP确定所述优先级最高的空闲信道的标识。
结合第一方面的第一种可能实施方式，在第一方面的第二种可能实施方式中，所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
结合第一方面或第一方面的第一种可能实施方式或第二种可能实施方式，在第一方面的第三种可能实施方式中，所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，具体包括：若所述QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否大于第二预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述AP确定向所述站点分配所述空闲信道，其中，所述第一预设值等于所述BSS的最大业务负载量，所述第二预设值等于所述AP在建立所述BSS的带宽上的最大吞吐量，所述第三预设值等于所述AP在建立所述BSS的带宽上的最大可用带宽；若所述QoS参数为延迟要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否小于第四预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述AP确定向所述站点分配所述空闲信道，所述第四预设值等于所述AP在建立所述BSS的带宽 上的可达到的最小时延。
结合第一方面或第一方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式，在第一方面的第四种可能实施方式中，所述资源响应消息携带在所述AP向所述站点发送的物理层协议数据单元PPDU中的高效信令字段HE-SIG-B中，或者所述资源响应消息携带在所述PPDU的下行链路子帧DL subframe的负载payload中。
结合第一方面或第一方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式，在第一方面的第五种可能实施方式中，所述资源响应消息携带在信标Beacon帧中，所述时长为两个Beacon帧的间隔时间或者所述间隔时间的整数倍。
结合第一方面或第一方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式或第四种可能实施方式或第五种可能实施方式，在第一方面的第六种可能实施方式中，在所述AP向所述站点发送资源响应消息之后，还包括：所述AP接收所述站点发送的提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
第二方面，本发明实施例提供一种信道接入方法，包括：发起设备到设备D2D传输的站点向接入点AP发送资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，以使所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；所述站点接收所述AP发送的资源响应消息，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长；所述站点根据所述资源响应消息在所述优先级最高的空闲信道的空闲带宽上进行数据传输。
结合第二方面，在第二方面的第一种可能实施方式中，还包括：所述站点确定至少一个所述空闲信道的优先级；所述站点向所述AP发送所述优先级，以使所述AP确定所述优先级最高的空闲信道的标识。
结合第二方面的第一种可能实施方式，在第二方面的第二种可能实施方式中，所述站点确定至少一个所述空闲信道的优先级，具体包括：所述空闲 信道的空闲带宽比例越大，则对应所述优先级越高；其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
结合第二方面或第二方面的第一种可能实施方式或第二种可能实施方式，在第二方面的第三种可能实施方式中，还包括：所述站点向所述AP发送提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
结合第二方面或第二方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式，在第二方面的第四种可能实施方式中，所述站点根据所述资源响应消息在所述优先级最高的空闲信道的空闲带宽上进行数据传输，具体包括：所述站点根据所述资源响应消息在所述空闲信道的空闲带宽上与发起所述另一个D2D传输的站点采用载波侦听多点接入/冲突避免方式竞争进行数据传输。
第三方面，本发明实施例提供一种接入点AP，包括：接收模块，用于接收站点发送的资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，其中所述站点为发起设备到设备D2D传输的站点；确定模块，用于根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；发送模块，用于向所述站点发送资源响应消息，以使所述站点根据所述资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长。
结合第三方面，在第三方面的第一种可能实施方式中，所述接收模块，还用于接收所述站点侦听到的至少一个所述空闲信道的优先级；所述确定模块，还用于确定所述优先级最高的空闲信道的标识。
结合第三方面的第一种可能实施方式，在第三方面的第二种可能实施方式中，所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
结合第三方面或第三方面的第一种可能实施方式或第二种可能实施方 式，在第三方面的第三种可能实施方式中，所述确定模块，具体用于：若所述QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否大于第二预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述确定模块确定向所述站点分配所述空闲信道，其中，所述第一预设值等于所述BSS的最大业务负载量，所述第二预设值等于所述AP在建立所述BSS的带宽上的最大吞吐量，所述第三预设值等于所述AP在建立所述BSS的带宽上的最大可用带宽；若所述QoS参数为延迟要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否小于第四预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述确定模块确定向所述站点分配所述空闲信道，所述第四预设值等于所述AP在建立所述BSS的带宽上的可达到的最小时延。
结合第三方面或第三方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式，在第三方面的第四种可能实施方式中，所述资源响应消息携带在所述AP向所述站点发送的物理层协议数据单元PPDU中的高效信令字段HE-SIG-B中，或者所述资源响应消息携带在所述PPDU的下行链路子帧DL subframe的负载payload中。
结合第三方面或第三方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式，在第三方面的第五种可能实施方式中，所述资源响应消息携带在信标Beacon帧中，所述时长为两个Beacon帧的间隔时间或者所述间隔时间的整数倍。
结合第三方面或第三方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式或第四种可能实施方式或第五种可能实施方式，在第三方面的第六种可能实施方式中，所述接收模块还用于：接收所述站点发送的提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
第四方面，本发明实施例提供一种站点，所述站点为发起设备到设备D2D传输的站点，包括：发送模块，用于向接入点AP发送资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓 存数据大小，以使所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；接收模块，用于接收所述AP发送的资源响应消息，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长；传输模块，用于根据所述资源响应消息在所述优先级最高的空闲信道的空闲带宽上进行数据传输。
结合第四方面，在第四方面的第一种可能实施方式中，还包括：确定模块，用于确定至少一个所述空闲信道的优先级；所述发送模块向所述AP发送所述优先级，以使所述AP确定所述优先级最高的空闲信道的标识。
结合第四方面的第一种可能实施方式，在第四方面的第二种可能实施方式中，所述确定模块，具体用于：所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
结合第四方面或第四方面的第一种可能实施方式或第二种可能实施方式，在第四方面的第三种可能实施方式中，所述发送模块，还用于：向所述AP发送提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
结合第四方面或第四方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式，在第四方面的第四种可能实施方式中，所述传输模块，具体用于：根据所述资源响应消息在所述空闲信道的空闲带宽上与发起所述另一个D2D传输的站点采用载波侦听多点接入/冲突避免方式竞争进行数据传输。
第五方面，本发明实施例提供一种接入点AP，包括：接收器，用于接收站点发送的资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，其中所述站点为发起设备到设备D2D传输的站点；处理器，用于根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；发送器， 用于向所述站点发送资源响应消息，以使所述站点根据所述资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长。
结合第五方面，在第五方面的第一种可能实施方式中，所述接收器，还用于接收所述站点侦听到的至少一个所述空闲信道的优先级；所述处理器，还用于确定所述优先级最高的空闲信道的标识。
结合第五方面的第一种可能实施方式，在第五方面的第二种可能实施方式中，所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
结合第五方面或第五方面的第一种可能实施方式或第二种可能实施方式，在第五方面的第三种可能实施方式中，所述处理器，具体用于：若所述QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否大于第二预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述处理器确定向所述站点分配所述空闲信道，其中，所述第一预设值等于所述BSS的最大业务负载量，所述第二预设值等于所述AP在建立所述BSS的带宽上的最大吞吐量，所述第三预设值等于所述AP在建立所述BSS的带宽上的最大可用带宽；若所述QoS参数为延迟要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否小于第四预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述处理器确定向所述站点分配所述空闲信道，所述第四预设值等于所述AP在建立所述BSS的带宽上的可达到的最小时延。
结合第五方面或第五方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式，在第五方面的第四种可能实施方式中，所述资源响应消息携带在所述AP向所述站点发送的物理层协议数据单元PPDU中的高效信令字段HE-SIG-B中，或者所述资源响应消息携带在所述PPDU的下行链路子帧DL subframe的负载payload中。
结合第五方面或第五方面的第一种可能实施方式或第二种可能实施方式 或第三种可能实施方式，在第五方面的第五种可能实施方式中，所述资源响应消息携带在信标Beacon帧中，所述时长为两个Beacon帧的间隔时间或者所述间隔时间的整数倍。
结合第五方面或第五方面的第一种可能实施方式或第二种可能实施方式或第三种可能实施方式或第四种可能实施方式或第五种可能实施方式，在第五方面的第六种可能实施方式中，所述接收器还用于：接收所述站点发送的提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
第六方面，本发明实施例提供一种站点，所述站点为发起设备到设备D2D传输的站点，包括：发送器，用于向接入点AP发送资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，以使所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；接收器，用于接收所述AP发送的资源响应消息，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长；处理器，用于根据所述资源响应消息在所述优先级最高的空闲信道的空闲带宽上进行数据传输。
结合第六方面，在第六方面的第一种可能实施方式中，所述处理器，还用于确定至少一个所述空闲信道的优先级；所述发送器，还用于向所述AP发送所述优先级，以使所述AP确定所述优先级最高的空闲信道的标识。
结合第六方面的第一种可能实施方式，在第六方面的第二种可能实施方式中，所述处理器，具体用于：所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
结合第六方面或第六方面的第一种可能实施方式或第二种可能实施方式，在第六方面的第三种可能实施方式中，所述发送器，还用于：向所述AP发送提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
结合第六方面或第六方面的第一种可能实施方式或第二种可能实施方式 或第三种可能实施方式，在第六方面的第四种可能实施方式中，所述处理器，具体用于：根据所述资源响应消息在所述空闲信道的空闲带宽上与发起所述另一个D2D传输的站点采用载波侦听多点接入/冲突避免方式竞争进行数据传输。
本发明实施例提供一种信道接入方法、接入点及站点，由于本发明实施例提供的信道接入方法将D2D传输接入至空闲信道上，该空闲信道只需存在空闲带宽即可，使得空闲带宽得到合理利用，其次，D2D传输被接入至优先级最高的空闲信道，从而更加合理的利用了信道资源，进而提高了通信网络的容量。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例的一个应用场景的示意图；
图2为本发明一实施例提供的一种信道接入方法的流程图；
图3为本发明一实施例提供的D2D传输的信道接入示意图；
图4为本发明一实施例提供的D2D传输的信道接入示意图一；
图5为本发明一实施例提供的D2D传输的信道接入示意图二；
图6为本发明一实施例提供的D2D传输的信道接入示意图三；
图7为本发明一实施例提供的非连续D2D信道接入示意图；
图8为本发明另一实施例提供的一种信道接入方法的流程图；
图9为本发明一实施例提供的一种接入点AP的结构示意图；
图10为本发明一实施例提供的一种站点的结构示意图；
图11为本发明另一实施例提供的一种接入点AP的结构示意图；
图12为本发明另一实施例提供的一种站点的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行 清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的技术方案建立在WLAN技术之上的。本方案是基于正交频分多址(Orthogonal Frequency-Division Multiple Access，简称OFDMA)技术提出的，其中，OFDMA技术是OFDM技术的演进。在利用OFDM对信道进行子载波化后，在部分子载波上加载传输数据的传输技术。由于现有技术中参与D2D传输的站点与非直接传输的站点通过CSMA/CA方式竞争使用同一信道。从而造成不能合理利用信道资源，降低了通信网络的容量。为了解决这一技术问题，本发明提供一种信道接入方法、接入点及站点。
图1是本发明实施例的一个应用场景的示意图。图1中，STA 101、STA 102和STA 103都关联于AP 100。AP 100建立的基本服务集(Basic Service Set，BSS)以调度的信道接入机制工作。AP 100负责传输资源的调度和分配。在整个BSS中，正常链路(AP至STA或者STA至AP)和直接链路(即STA至STA之间采用D2D传输)共存。STA 101和STA 102之间属于D2D通信，STA 103和AP 100之间属于正常链路通信，即STA 103和AP 100之间采用非直接传输方式。
图2为本发明一实施例提供的一种信道接入方法的流程图，该方法可应用于无线局域网WLAN，该方法的执行主体为接入点AP，如图2所示，该方法具体包括如下流程：
S201：接入点AP接收站点发送的资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量(Quality of Service，简称QoS)参数，站点的缓存数据大小，其中站点为发起设备到设备D2D传输的站点；
其中，站点通过向AP发送资源请求消息来获得适合该站点传输的空闲信道，这里资源请求消息携带服务质量QoS参数和站点的缓存数据大小中的至少一个，这里的QoS参数可以是吞吐量要求或者延迟要求等。本发明对QoS参数所包括的内容不做限制。
S202：AP根据所在的基本服务集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个参数确定向站点分配AP的空闲信道，空闲信道为存在空闲带宽的信道；
具体地，空闲信道有两种情况：第一种：整个信道带宽为空闲状态，比如：信道总带宽为80兆赫(Mega Hertz，简称MHz)，而这80MHz全部为空闲状态；第二种：整个信道中存在部分带宽为空闲状态，剩下部分带宽为忙碌状态，比如：信道总带宽为80兆赫(Mega Hertz，简称MHz)，其中20MHz为空闲状态，剩下的60MHz为忙碌状态，这里的业务负载量可以是BSS当前正在进行的业务传输量，可以通过统计BSS中正在进行业务传输站点的个数或者统计传输数据包的个数的方式或者是丢包率、占空比等来判断。
一种可选方式，若QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的QoS参数是否大于第二预设值和站点的缓存数据大小是否大于第三预设值，若是，则AP确定向站点分配空闲信道，其中，第一预设值等于BSS的最大业务负载量，第二预设值等于AP在建立BSS的带宽上的最大吞吐量，第三预设值等于AP在建立BSS的带宽上的最大可用带宽；比如：若满足上述条件，则AP可以为参与D2D的站点分配AP空闲信道。
另一种可选方式，若QoS参数为延迟要求，则判断以下三个条件中的至少一者是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的QoS参数是否小于第四预设值和站点的缓存数据大小是否大于第三预设值，若是，则AP向站点分配空闲信道。具体地，这里的第一预设值、第二预设值、第三预设值和第四预设值分别是对应于业务负载量、吞吐量要求、缓存数据大小以及时延要求的预设值，其中第四预设值等于AP在建立BSS的带宽上的可达到的最小时延。
S203：AP向站点发送资源响应消息，以使站点根据资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，资源响应消息携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；或者，资源响应消息携带所占用优先级最高的空闲信道的时长。
具体地，当AP确定可以向站点分配AP空闲信道时，这时AP会向站点发送资源响应消息，其中在两种不同场景下资源响应消息会不尽相同，第一种场景：进行D2D传输的站点可以将它所支持的带宽和频段等能力信息通知给AP，然后将侦听到的空闲信道的优先级发送给AP；其中，空闲信道的空闲带宽比例越大，则对应优先级越高；其中空闲带宽比例为空闲信道的空闲带宽 与所述总带宽的比值。然后，AP确定优先级最高的空闲信道的标识。这时资源响应消息将携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；第二种场景：站点将侦听到的空闲信道的优先级不向AP发送，但是进行D2D传输的两个站点它们可以协商双方的能力信息，并侦听空闲信道的优先级，最后确定优先级最高的空闲信道为默认信道，这种情况下资源响应消息仅携带所占用的优先级最高的空闲信道的时长，并且作为一个触发条件，一旦进行D2D传输的站点接收到该资源响应消息，则它们会在默认空闲信道上进行数据传输。其中确定空闲信道优先级的方法除了通过空闲带宽比例确定之外，还可以通过如下的方法确定，比如：对AP的空闲信道干扰越小，则对应的优先级越高，或者，若该空闲信道与AP当前传输信道的距离越短，则该空闲信道的优先级越高。当然，也可以通过上述三者共同来确定空闲信道的优先级，本发明对此不做限制。
一种可选方式，资源响应消息携带在AP向站点发送的物理层协议数据单元(Physical Protocol Data Unit，简称PPDU)中的高效信令字段B(High Efficiency Signal B，简称HE-SIG-B)字段中，或者资源响应消息携带在PPDU的下行链路(Downlink，简称DL)子帧(subframe)的负载(payload)中。图3为本发明一实施例提供的D2D传输的信道接入示意图，如图3所示，D2D传输的信道与AP发送或接收PPDU的信道不同，即D2D是在空闲信道上，AP向进行D2D传输的站点发送的资源响应消息可以携带在HE-SIG-B字段中，其中HE-SIG-B承载在高效率无线局域网(High Efficiency WLAN，简称HEW)信令字段中，当然该资源响应消息也可以携带在下行链路DL subframe的payload中。
基于这种情况，下面介绍时长的问题，首先，AP可以指定D2D时长，指定的时长可能会存在以下三种情况，第一种：图4为本发明一实施例提供的D2D传输的信道接入示意图一，如图4所示，可以在调度窗口结束时结束D2D传输，其中图4中所示无线帧(Radio Frame，简称RF)是在调度窗口中进行调度传输的，这里的调度窗口是指AP与那些非直接传输的站点之间进行业务交互时的传输时间窗口。第二种，图5为本发明一实施例提供的D2D传输的信道接入示意图二，如图5所示，也可以在调度窗口结束时，继续进行D2D传输。第三种，图6为本发明一实施例提供的D2D传输的信道接入示意图三，如图6 所示，D2D传输是在一个调度窗口中的上行链路子帧和下行链路子帧的转换时间结束的，以便进行D2D传输的站点可以将竞争所得的资源交还给AP。本发明实施例不对D2D时长做限制。
另一种可选方式，资源响应消息携带在信标Beacon帧中。基于这种情况，时长可以为两个Beacon帧的间隔时间或者为所述间隔时间的整数倍。
上述介绍的资源响应消息可以承载的位置本发明并不做限定。时长还可以承载在传统前导(legacy preamble)中，或者承载在信道保护帧中的网络分配矢量(Network AllocationVector，简称NAV)中，例如请求发送(Request To Send，简称RTS)或者清除发送(Clear To Send，简称CTS)中的介质访问控制(Media Access Control，简称MAC)帧头中的NAV中。
进一步地，在AP向所述站点发送资源响应消息之后，还包括：AP接收站点发送的提示信息，提示信息用于表示站点已在空闲信道上正在进行或者完成了数据传输。一方面使得AP可以获得使用该空闲信道的使用权，另一方面，AP可以与上述站点可以进行下一次传输，比如：下一次传输有可能是一个非直接传输，而是站点到AP之间的传输，即站点之间的交互要经过AP。
更进一步地，本发明一实施例提供的80+80MHz的D2D信道接入示意图，如图4所示，这是一种80+80MHz的非连续160MHz的场景，AP在主80MHz进行非直接传输的调度传输，而将D2D传输调度至次80MHz上，并以CSMA/CA的方式进行接入，即80+80兆赫的信道为存在空闲带宽的空闲信道，其中次80MHz对于发起D2D传输的站点是空闲带宽。进行D2D传输的站点可以采用CSMA/CA方式竞争使用次80MHz频段进行数据传输。图7为本发明一实施例提供的非连续D2D信道接入示意图，如图7所示，AP在80MHz带宽的信道上建立BSS，在某一时刻只有其中的60MHz带宽用于AP建立BSS，即非直接传输只需在60MHz带宽上进行，剩下的20MHz可供D2D传输，进行D2D传输的站点与发起另一个D2D传输的站点采用CSMA/CA方式竞争使用剩余的20MHz带宽。
本发明实施例提供一种信道接入方法，包括：接入点AP接收站点发送的资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量QoS参数，站点的缓存数据大小，其中站点为发起D2D传输的站点；AP根据所在的基本服务集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个 参数确定向站点分配AP的空闲信道，空闲信道为存在空闲带宽的信道；AP向站点发送资源响应消息，以使站点根据资源响应消息在优先级最高的空闲信道上进行数据传输，资源响应消息携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；或者，资源响应消息携带所占用优先级最高的空闲信道的时长，综上，首先，本发明实施例提供的信道接入方法将D2D传输接入至空闲信道上，该空闲信道只需存在空闲带宽即可，而现有技术中D2D传输的站点和非直接传输的站点竞争信道资源，一旦竞争到则占据整个信道，使得空闲带宽无法合理利用，其次，D2D传输被接入至优先级最高的空闲信道从而合理的利用了信道资源，进而提高了通信网络的容量。
图8为本发明另一实施例提供的一种信道接入方法的流程图，该方法的执行主体为发起D2D传输的站点，如图8所示，该方法具体包括如下流程：
S801：发起D2D传输的站点向接入点AP发送资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量QoS参数，站点的缓存数据大小，以使AP根据所在的基本服务集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个参数确定向站点分配AP的空闲信道，空闲信道为存在空闲带宽的信道；
其中，站点通过向AP发送资源请求消息来获得适合该站点传输的空闲信道，这里资源请求消息携带站点请求的服务质量QoS参数和站点的缓存数据大小中的至少一个，这里的QoS参数可以是吞吐量要求或者延迟要求等。本发明对QoS参数所包括的内容不做限制。
S802：站点接收AP发送的资源响应消息，资源响应消息携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；或者，资源响应消息携带所占用优先级最高的空闲信道的时长；
具体地，在两种不同场景下资源响应消息会不尽相同，第一种场景：进行D2D传输的站点可以将它所支持的带宽和频段等能力信息通知给AP，然后将侦听到的至少一个空闲信道的优先级发送给AP；其中，空闲信道的空闲带宽比例越大，则对应优先级越高，空闲带宽比例为空闲信道的空闲带宽与总带宽的比值。然后，AP确定优先级最高的空闲信道的标识。这时资源响应消息将携带优先级最高的空闲信道的标识和占用优先级最高的空闲信道的时长；第二种场景：站点侦听到的空闲信道的优先级不向AP发送，但是进行D2D 传输的两个站点它们可以预先协商双方的能力信息，最后确定优先级最高的空闲信道为默认信道，这种情况下资源响应消息仅携带占用优先级最高的空闲信道的时长，并且作为一个触发条件，一旦站点接收到该资源响应消息，则它们会在默认信道上进行数据传输。
S803：站点根据资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输。
可选地，所述站点根据所述资源响应消息在空闲信道的空闲带宽上与发起另一个D2D传输的站点采用载波侦听多点接入/冲突避免(CSMA/CA)方式竞争进行数据传输。
进一步地，站点向AP发送提示信息，提示信息用于表示站点已在空闲信道上正在进行或者完成了数据传输。一方面使得AP可以获得使用该空闲信道的使用权，另一方面，AP可以与上述站点可以进行下一次传输，比如：下一次传输有可能是一个非直接传输，而是站点到AP之间的传输，即站点之间的交互要经过AP。
本发明实施例提供一种信道接入方法，包括：首先，发起D2D传输的站点向接入点AP发送资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量QoS参数，站点的缓存数据大小，以使AP根据所在的基本服务集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个参数确定向站点分配AP的空闲信道，空闲信道为存在空闲带宽的信道；其次，站点接收AP发送的资源响应消息，资源响应消息携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；或者，资源响应消息携带所占用优先级最高的空闲信道的时长；最后，站点根据资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输。从而使得进行D2D的站点可以在空闲信道的空闲带宽上进行数据传输，合理的利用了信道资源，提高了通信网络的容量。
图9为本发明一实施例提供的一种接入点AP的结构示意图，如图9所示，该接入点包括：接收模块901，用于接收站点发送的资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量QoS参数，站点的缓存数据大小，其中站点为发起设备到设备D2D传输的站点；确定模块902，用于根据所在的基本服务集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个 参数确定向站点分配AP的空闲信道，空闲信道为存在空闲带宽的信道；发送模块903，用于向站点发送资源响应消息，以使站点根据资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，资源响应消息携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；或者，资源响应消息携带所占用优先级最高的空闲信道的时长。
其中，接收模块901还用于接收站点侦听到的至少一个空闲信道的优先级；确定模块902，还用于确定优先级最高的空闲信道的标识。所述空闲信道的空闲带宽比例越大，则对应优先级越高；所述空闲带宽比例为空闲信道的空闲带宽与总带宽的比值。
进一步地，确定模块902具体用于：第一种情况：“若QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的QoS参数是否大于第二预设值和站点的缓存数据大小是否大于第三预设值，若成立，则确定模块902确定向站点分配空闲信道，其中，第一预设值等于BSS的最大业务负载量，第二预设值等于AP在建立BSS的带宽上的最大吞吐量，第三预设值等于AP在建立BSS的带宽上的最大可用带宽。
第二种情况，若QoS参数为延迟要求，则判断以下三个条件中的至少一个是否成立，三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的QoS参数是否小于第四预设值和站点的缓存数据大小是否大于第三预设值，若成立，则确定模块902确定向站点分配空闲信道，第四预设值等于AP在建立BSS的带宽上的可达到的最小时延。
一种可选方式，资源响应消息携带在AP向站点发送的物理层协议数据单元PPDU中的HE-SIG-B中，或者所述资源响应消息携带在所述PPDU的下行链路子帧DL subframe的负载payload中。
另一种可选方式，资源响应消息携带在信标Beacon帧中，时长为两个Beacon帧的间隔时间或者所述间隔时间的整数倍。
进一步地，接收模块901还用于：接收站点发送的提示信息，提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
本实施例提供的接入点AP，用于执行图2所对应的信道接入方法的实施技术方案，其实现原理和技术效果类似，此处不再赘述。
图10为本发明一实施例提供的一种站点的结构示意图，所述站点为发起设备到设备D2D传输的站点，如图10所示，该站点包括：发送模块1001，用于向接入点AP发送资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量QoS参数，站点的缓存数据大小，以使AP根据所在的基本服务集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个参数确定向站点分配AP的空闲信道，空闲信道为存在空闲带宽的信道；接收模块1002，用于接收AP发送的资源响应消息，资源响应消息携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；或者，资源响应消息携带所占用优先级最高的空闲信道的时长；传输模块1003，用于根据资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输。
进一步地，还包括：确定模块1004，用于确定至少一个空闲信道的优先级；发送模块1001向AP发送优先级，以使AP确定优先级最高的空闲信道的标识。其中确定模块1004，具体用于：空闲信道的空闲带宽比例越大，则对应优先级越高；其中空闲带宽比例为空闲信道的空闲带宽与总带宽的比值。
更进一步地，发送模块1001，还用于：向AP发送提示信息，提示信息用于表示站点已在空闲信道上正在进行或者完成了数据传输。传输模块1003具体用于：根据资源响应消息在空闲信道的空闲带宽上与发起另一个D2D传输的站点采用载波侦听多点接入/冲突避免方式竞争进行数据传输。
本实施例提供的站点，用于执行图8所对应的信道接入方法的实施技术方案，其实现原理和技术效果类似，此处不再赘述。
图11为本发明另一实施例提供的一种接入点AP的结构示意图，如图11所示，该接入点包括：接收器1101，用于接收站点发送的资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量QoS参数，站点的缓存数据大小，其中站点为发起设备到设备D2D传输的站点；处理器1102，用于根据所在的基本服务集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个参数确定向站点分配AP的空闲信道，空闲信道为存在空闲带宽的信道；发送器1103，用于向站点发送资源响应消息，以使站点根据资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，资源响应消息携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；或者，资源响应消息携带所占用优先级最高的空闲信道的时长。
其中，接收器1101还用于接收站点侦听到的至少一个空闲信道的优先级；处理器1102，还用于确定优先级最高的空闲信道的标识。所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
进一步地，处理器1102具体用于：若QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的QoS参数是否大于第二预设值和站点的缓存数据大小是否大于第三预设值，若成立，则处理器1102确定向站点分配空闲信道，其中，第一预设值等于BSS的最大业务负载量，第二预设值等于所述AP在建立BSS的带宽上的最大吞吐量，第三预设值等于AP在建立BSS的带宽上的最大可用带宽。
若QoS参数为延迟要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否小于第四预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述处理器1102确定向所述站点分配所述空闲信道，所述第四预设值等于所述AP在建立所述BSS的带宽上的可达到的最小时延。
一种可选方式，资源响应消息携带在AP向站点发送的物理层协议数据单元PPDU中的HE-SIG-B中，或者资源响应消息携带在PPDU的下行链路子帧DL subframe的负载payload中。
另一种可选方式，资源响应消息携带在信标Beacon帧中，时长为两个Beacon帧的间隔时间或者所述间隔时间的整数倍。
进一步地，接收器1101还用于：接收站点发送的提示信息，提示信息用于表示站点已在空闲信道上正在进行或者完成了数据传输。
本实施例提供的接入点AP，用于执行图2所对应的信道接入方法的实施技术方案，其实现原理和技术效果类似，此处不再赘述。
图12为本发明另一实施例提供的一种站点的结构示意图，所述站点为发起设备到设备D2D传输的站点，如图12所示，该站点包括：发送器1201，用于向接入点AP发送资源请求消息，资源请求消息携带以下参数中的至少一个：服务质量QoS参数，站点的缓存数据大小，以使AP根据所在的基本服务 集BSS的业务负载量、QoS参数和站点的缓存数据大小中的至少一个参数确定向站点分配AP的空闲信道，空闲信道为存在空闲带宽的信道；接收器1202，用于接收AP发送的资源响应消息，资源响应消息携带优先级最高的空闲信道的标识和所占用优先级最高的空闲信道的时长；或者，资源响应消息携带所占用优先级最高的空闲信道的时长；处理器1203，用于根据资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输。
进一步地，处理器1203还用于确定至少一个所述空闲信道的优先级；所述发送器1201，还用于向AP发送所述优先级，以使AP确定优先级最高的空闲信道的标识。所述处理器1203具体用于：空闲信道的空闲带宽比例越大，则对应优先级越高；其中空闲带宽比例为空闲信道的空闲带宽与总带宽的比值。
更进一步地，发送器1201还用于：向AP发送提示信息，提示信息用于表示站点已在空闲信道上正在进行或者完成了数据传输。所述处理器1203，具体用于：根据资源响应消息在所述空闲信道的空闲带宽上与发起另一个D2D传输的站点采用载波侦听多点接入/冲突避免方式竞争进行数据传输。
本实施例提供的站点，用于执行图8所对应的信道接入方法的实施技术方案，其实现原理和技术效果类似，此处不再赘述。
本领域普通技术人员可以理解：实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (36)

  1. 一种信道接入方法，应用于无线局域网WLAN，其特征在于，包括：
    接入点AP接收站点发送的资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，其中所述站点为发起设备到设备D2D传输的站点；
    所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；
    所述AP向所述站点发送资源响应消息，以使所述站点根据所述资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    所述AP接收所述站点侦听到的至少一个所述空闲信道的优先级；
    所述AP确定所述优先级最高的空闲信道的标识。
  3. 根据权利要求2所述的方法，其特征在于，所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；
    其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，具体包括：
    若所述QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否大于第二预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述AP确定向所述站点分配所述空闲信道，其中，所述第一预设值等于所述BSS的最大业务负载量，所述第二预设值等于所述AP在建立所述BSS的带宽上的最大吞吐量，所述第三预设值等于所述AP在建立所述BSS的带宽上的最大可用带宽；
    若所述QoS参数为延迟要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否小于第四预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述AP确定向所述站点分配所述空闲信道，所述第四预设值等于所述AP在建立所述BSS的带宽上的可达到的最小时延。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述资源响应消息携带在所述AP向所述站点发送的物理层协议数据单元PPDU中的高效信令字段HE-SIG-B字段中，或者所述资源响应消息携带在所述PPDU的下行链路子帧DL subframe的负载payload中。
  6. 根据权利要求1-4任一项所述的方法，其特征在于，所述资源响应消息携带在信标Beacon帧中，所述时长为两个Beacon帧的间隔时间或者所述间隔时间的整数倍。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，在所述AP向所述站点发送资源响应消息之后，还包括：
    所述AP接收所述站点发送的提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
  8. 一种信道接入方法，其特征在于，包括：
    发起设备到设备D2D传输的站点向接入点AP发送资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，以使所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；
    所述站点接收所述AP发送的资源响应消息，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长；
    所述站点根据所述资源响应消息在所述优先级最高的空闲信道的空闲带宽上进行数据传输。
  9. 根据权利要求8所述的方法，其特征在于，还包括：
    所述站点确定至少一个所述空闲信道的优先级；
    所述站点向所述AP发送所述优先级，以使所述AP确定所述优先级最高的空闲信道的标识。
  10. 根据权利要求9所述的方法，其特征在于，所述站点确定至少一个所述空闲信道的优先级，具体包括：
    所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；
    其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
  11. 根据权利要求8-10任一项所述的方法，其特征在于，还包括：
    所述站点向所述AP发送提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
  12. 根据权利要求8-11任一项所述的方法，其特征在于，所述站点根据所述资源响应消息在所述优先级最高的空闲信道的空闲带宽上进行数据传输，具体包括：
    所述站点根据所述资源响应消息在所述空闲信道的空闲带宽上与发起所述另一个D2D传输的站点采用载波侦听多点接入/冲突避免方式竞争进行数据传输。
  13. 一种接入点AP，其特征在于，包括：
    接收模块，用于接收站点发送的资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，其中所述站点为发起设备到设备D2D传输的站点；
    确定模块，用于根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；
    发送模块，用于向所述站点发送资源响应消息，以使所述站点根据所述资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长。
  14. 根据权利要求13所述的接入点，其特征在于，
    所述接收模块，还用于接收所述站点侦听到的至少一个所述空闲信道的 优先级；
    所述确定模块，还用于确定所述优先级最高的空闲信道的标识。
  15. 根据权利要求14所述的接入点，其特征在于，所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；
    其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
  16. 根据权利要求13-15任一项所述的接入点，其特征在于，所述确定模块，具体用于：
    若所述QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否大于第二预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述确定模块确定向所述站点分配所述空闲信道，其中，所述第一预设值等于所述BSS的最大业务负载量，所述第二预设值等于所述AP在建立所述BSS的带宽上的最大吞吐量，所述第三预设值等于所述AP在建立所述BSS的带宽上的最大可用带宽；
    若所述QoS参数为延迟要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否小于第四预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述确定模块确定向所述站点分配所述空闲信道，所述第四预设值等于所述AP在建立所述BSS的带宽上的可达到的最小时延。
  17. 根据权利要求13-16任一项所述的接入点，其特征在于，所述资源响应消息携带在所述AP向所述站点发送的物理层协议数据单元PPDU中的高效信令字段HE-SIG-B中，或者所述资源响应消息携带在所述PPDU的下行链路子帧DL subframe的负载payload中。
  18. 根据权利要求13-16任一项所述的接入点，其特征在于，所述资源响应消息携带在信标Beacon帧中，所述时长为两个Beacon帧的间隔时间或者所述间隔时间的整数倍。
  19. 根据权利要求13-18任一项所述的接入点，其特征在于，所述接收模块还用于：
    接收所述站点发送的提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
  20. 一种站点，其特征在于，所述站点为发起设备到设备D2D传输的站点，包括：
    发送模块，用于向接入点AP发送资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，以使所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；
    接收模块，用于接收所述AP发送的资源响应消息，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长；
    传输模块，用于根据所述资源响应消息在所述优先级最高的空闲信道的空闲带宽上进行数据传输。
  21. 根据权利要求20所述的站点，其特征在于，还包括：
    确定模块，用于确定至少一个所述空闲信道的优先级；
    所述发送模块向所述AP发送所述优先级，以使所述AP确定所述优先级最高的空闲信道的标识。
  22. 根据权利要求21所述的站点，其特征在于，所述确定模块，具体用于：
    所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；
    其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
  23. 根据权利要求20-22任一项所述的站点，其特征在于，所述发送模块，还用于：
    向所述AP发送提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
  24. 根据权利要求20-23任一项所述的站点，其特征在于，所述传输模块，具体用于：
    根据所述资源响应消息在所述空闲信道的空闲带宽上与发起所述另一个D2D传输的站点采用载波侦听多点接入/冲突避免方式竞争进行数据传输。
  25. 一种接入点AP，其特征在于，包括：
    接收器，用于接收站点发送的资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，其中所述站点为发起设备到设备D2D传输的站点；
    处理器，用于根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；
    发送器，用于向所述站点发送资源响应消息，以使所述站点根据所述资源响应消息在优先级最高的空闲信道的空闲带宽上进行数据传输，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长。
  26. 根据权利要求25所述的接入点，其特征在于，
    所述接收器，还用于接收所述站点侦听到的至少一个所述空闲信道的优先级；
    所述处理器，还用于确定所述优先级最高的空闲信道的标识。
  27. 根据权利要求26所述的接入点，其特征在于，所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；
    其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
  28. 根据权利要求25-27任一项所述的接入点，其特征在于，所述处理器，具体用于：
    若所述QoS参数为吞吐量要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否大于第二预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述处理器确定向所述站点分配所述空闲信道，其中，所述第一预设值等于所述BSS的最大业务负载量，所述第二预设值等于所述AP在建立所述BSS的带宽上的最大吞吐量，所述第三预设 值等于所述AP在建立所述BSS的带宽上的最大可用带宽；
    若所述QoS参数为延迟要求，则判断以下三个条件中的至少一个是否成立，所述三个条件包括：所在的基本服务集BSS的业务负载量是否大于第一预设值、请求的所述QoS参数是否小于第四预设值和所述站点的缓存数据大小是否大于第三预设值，若成立，则所述处理器确定向所述站点分配所述空闲信道，所述第四预设值等于所述AP在建立所述BSS的带宽上的可达到的最小时延。
  29. 根据权利要求25-28任一项所述的接入点，其特征在于，所述资源响应消息携带在所述AP向所述站点发送的物理层协议数据单元PPDU中的高效信令字段HE-SIG-B中，或者所述资源响应消息携带在所述PPDU的下行链路子帧DL subframe的负载payload中。
  30. 根据权利要求25-28任一项所述的接入点，其特征在于，所述资源响应消息携带在信标Beacon帧中，所述时长为两个Beacon帧的间隔时间或者所述间隔时间的整数倍。
  31. 根据权利要求25-30任一项所述的接入点，其特征在于，所述接收器还用于：
    接收所述站点发送的提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
  32. 一种站点，其特征在于，所述站点为发起设备到设备D2D传输的站点，包括：
    发送器，用于向接入点AP发送资源请求消息，所述资源请求消息携带以下参数中的至少一个：服务质量QoS参数，所述站点的缓存数据大小，以使所述AP根据所在的基本服务集BSS的业务负载量、所述QoS参数和所述站点的缓存数据大小中的至少一个参数确定向所述站点分配所述AP的空闲信道，所述空闲信道为存在空闲带宽的信道；
    接收器，用于接收所述AP发送的资源响应消息，所述资源响应消息携带所述优先级最高的空闲信道的标识和所占用所述优先级最高的空闲信道的时长；或者，所述资源响应消息携带所占用所述优先级最高的空闲信道的时长；
    处理器，用于根据所述资源响应消息在所述优先级最高的空闲信道的空闲带宽上进行数据传输。
  33. 根据权利要求32所述的站点，其特征在于，
    所述处理器，还用于确定至少一个所述空闲信道的优先级；
    所述发送器，还用于向所述AP发送所述优先级，以使所述AP确定所述优先级最高的空闲信道的标识。
  34. 根据权利要求33所述的站点，其特征在于，所述处理器，具体用于：
    所述空闲信道的空闲带宽比例越大，则对应所述优先级越高；
    其中所述空闲带宽比例为所述空闲信道的空闲带宽与所述总带宽的比值。
  35. 根据权利要求32-34任一项所述的站点，其特征在于，所述发送器，还用于：
    向所述AP发送提示信息，所述提示信息用于表示所述站点已在所述空闲信道上正在进行或者完成了数据传输。
  36. 根据权利要求32-35任一项所述的站点，其特征在于，所述处理器，具体用于：
    根据所述资源响应消息在所述空闲信道的空闲带宽上与发起所述另一个D2D传输的站点采用载波侦听多点接入/冲突避免方式竞争进行数据传输。
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