WO2015113204A1 - 一种数据传输方法及站点 - Google Patents

一种数据传输方法及站点 Download PDF

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Publication number
WO2015113204A1
WO2015113204A1 PCT/CN2014/071672 CN2014071672W WO2015113204A1 WO 2015113204 A1 WO2015113204 A1 WO 2015113204A1 CN 2014071672 W CN2014071672 W CN 2014071672W WO 2015113204 A1 WO2015113204 A1 WO 2015113204A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
random competition
designated random
indication frame
designated
Prior art date
Application number
PCT/CN2014/071672
Other languages
English (en)
French (fr)
Inventor
罗毅
李云波
张连波
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/071672 priority Critical patent/WO2015113204A1/zh
Priority to EP14880753.0A priority patent/EP3065349B1/en
Priority to KR1020167016942A priority patent/KR101864238B1/ko
Priority to JP2016548266A priority patent/JP6350837B2/ja
Priority to CN201480073496.3A priority patent/CN106105111B/zh
Publication of WO2015113204A1 publication Critical patent/WO2015113204A1/zh
Priority to US15/180,403 priority patent/US10164797B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/64Hybrid switching systems
    • H04L12/6418Hybrid transport
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00Arrangements for synchronising receiver with transmitter
    • H04L7/0008Synchronisation information channels, e.g. clock distribution lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/08Testing, supervising or monitoring using real traffic
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method and a station. Background technique
  • unlicensed spectrum is typically used for data transmission in a random, competitive manner.
  • a random competition is used for data transmission.
  • the status between different wireless networks is equal, and the status between different sites in the same wireless network is also equal, and all stations share all random competitions in the wireless network. channel.
  • the more sites deployed in a wireless network the longer the average time required for a site to access a shared random channel, resulting in a lack of quality of service for real-time services in wireless networks.
  • this method the competition between the stations can be reduced, thereby reducing the time for the station to access the random competition channel.
  • a first aspect of the present invention provides a data transmission method, including:
  • the station receives an indication frame sent by the access point, where the indication frame is used to allocate the specified random competition channel;
  • the station After listening to the designated random contention channel being in an idle state, the station transmits data on the designated random contention channel.
  • the station after the listening to the specified random contention channel is in an idle state, the station is in the specified random contention channel Send data on, including:
  • the station After listening to the specified random contention channel being in an idle state, the station performs backoff on the designated random contention channel;
  • the station After the end of the backoff time of the station, the station transmits data on the designated random contention channel.
  • the receiving, by the station, the indication frame sent by the access point includes:
  • the monitoring comprising: listening to a channel state of the specified random contention channel according to the channel frequency information of the specified random contention channel.
  • the receiving the indication frame sent by the access point includes:
  • the method further includes:
  • the station After the listening to the specified random contention channel is in an idle state, the station sends data on the specified random contention channel, including:
  • the The channel state of the competing channel including:
  • the station detects, according to the indication frame, a signal strength on the specified random contention channel; when the detected signal strength on the specified random contention channel is less than or equal to a preset threshold, determining The designated random contention channel is in an idle state.
  • the The channel state of the competing channel including:
  • the station detects, on a spectrum, a signal strength on a subcarrier corresponding to the specified random contention channel;
  • the receiving the indication frame sent by the access point includes: Receiving an indication frame sent by the access point, where the indication frame includes periodic time information of random competition;
  • the method further includes:
  • the station After the listening to the specified random contention channel is in an idle state, the station sends data on the specified random contention channel, including:
  • the station is listening to the specified random contention channel After being in an idle state, transmitting data on the specified random contention channel, including:
  • the station transmits data to the access point or another station on the designated random content channel after listening to the designated random contention channel being in an idle state.
  • the indication frame is further configured to be used for centralized scheduling transmission channel
  • the method also includes transmitting data on the channel for centralized scheduling transmission based on the indication frame.
  • the site after the listening to the specified random contention channel is in an idle state, the site is in the Sending data on the specified random content channel, including:
  • Orthogonal frequency division multiple access OFDMA
  • the random contention channel and the channel for centralized scheduling transmission satisfy an orthogonal frequency Sub-OFDM symbol synchronization.
  • a second aspect of the present invention provides a site, including: a receiving unit, configured to receive an indication frame sent by the access point, where the indication frame is used to specify a random contention channel;
  • a monitoring unit configured to monitor, according to the indication frame received by the receiving unit, a channel state of the specified random channel
  • a sending unit configured to send data on the specified random contention channel after the listening unit monitors that the specified random contention channel is in an idle state.
  • the sending unit is configured to: after the monitoring unit monitors that the specified random contention channel is in an idle state, in the designating Performing backoff on the random contention channel, including:
  • the receiving unit is configured to receive an indication frame that is sent by the access point, and includes: Receiving an indication frame sent by the access point, where the indication frame includes channel frequency information of the specified random contention channel;
  • the monitoring unit is configured to monitor, according to the indication frame received by the receiving unit, a channel state of the specified random contention channel, including:
  • the receiving unit is configured to receive an indication frame sent by the access point, including :
  • the receiving unit is further configured to acquire, according to the received time information of the random competition included in the indication frame, a time at which the station randomly transmits data on the designated random content channel;
  • the sending unit is configured to: after the listening unit monitors that the specified random contention channel is in an idle state, send data on the specified random contention channel, including: For transmitting on the specified random content channel after the listening unit detects that the specified random content channel is in an idle state, and during the random competition time acquired by the receiving unit data.
  • the monitoring unit is configured to receive, according to the receiving unit
  • the indication frame is configured to listen to a channel state of the specified random contention channel, including:
  • the sending unit is configured to receive, according to the receiving unit
  • the indication frame is configured to listen to a channel state of the specified random contention channel, including:
  • the station detects, on a spectrum, a signal strength on a subcarrier corresponding to the specified random contention channel;
  • the receiving unit is configured to receive the indication frame sent by the access point. , including:
  • the indication frame is sent by the access point, where the indication frame includes the periodic time information of the random competition; the receiving unit is further configured to obtain, according to the received periodic time information of the random competition included in the indication frame, a period of random competition in which the station transmits data on the designated random contention channel;
  • the monitoring unit is configured to monitor, according to the indication frame received by the receiving unit, a channel state of the specified random contention channel, including:
  • the sending unit is configured to monitor the listening unit After the specified random contention channel is in an idle state, sending data on the specified random contention channel includes:
  • the receiving unit is configured to receive the indication frame sent by the access point , including:
  • the receiving unit is configured to receive an indication frame sent by an access point, where the indication frame is further used to allocate a channel for centralized scheduling transmission;
  • the sending unit is further configured to send data on the channel for centralized scheduling transmission according to the indication frame received by the receiving unit.
  • the sending unit is configured to: after monitoring that the specified random contention channel is in an idle state, Transmitting data on the specified random contention channel includes:
  • the station transmits data on the random content channel specified by the indication frame according to the indication frame. Therefore, the method of the invention can allocate different random competition channels for data transmission for different stations, can reduce the competition between the stations, thereby reducing the time for the station to access the random competition channel, and guaranteeing the service quality of the real-time service of the wireless network. Improve the efficiency of data transmission over the network.
  • Embodiment 1 is a schematic flow chart of a data transmission method provided in Embodiment 1;
  • Embodiment 2 is a schematic flow chart of another data transmission method provided in Embodiment 2;
  • FIG. 3 is a schematic diagram of data transmission in an application scenario
  • FIG. 5 is a schematic diagram of data transmission in another application scenario
  • FIG. 6 is a structural block diagram of a station provided in Embodiment 3.
  • FIG. 7 is a structural block diagram of a station provided in Embodiment 4;
  • FIG. 8 is a structural block diagram of a station provided in Embodiment 5. detailed description
  • Embodiment 1 of the present invention provides a data transmission method, and the method may specifically include:
  • the station receives an indication frame sent by the access point, where the indication frame is used to allocate a specified random content channel.
  • the access point may send an indication frame over all channels or portions of the channel.
  • Monitor according to the indication frame, a channel state of the specified random contention channel.
  • the indication frame may include channel frequency information of the specified random contention channel, and the station may determine the specified random contention channel according to the channel frequency information of the specified random contention channel, and listen to the specified Randomly competing for the channel state of the channel.
  • the station After listening to the specified random contention channel being in an idle state, the station sends data on the specified random contention channel.
  • the method can allocate different random competition channels for different stations to perform data transmission, thereby reducing competition between stations, reducing the time for the station to access the random competition channel, thereby ensuring the quality of service of the real-time service of the wireless network. Improve the efficiency of data transmission over the network.
  • the step 103 may specifically include: after the station detects that the specified random contention channel is in an idle state, Backoff is performed on the specified random content channel. After the end of the backoff time of the station, the station transmits data on the designated random contention channel.
  • the designated random contention channel may occupy only part of the channel resources between the station and the access point, and the remaining part of the channel resources may serve as a channel for centralized scheduling transmission.
  • the indication frame sent by the station receiving access point may also be used to allocate a channel for centralized scheduling transmission; Transmitting data on the channel for centralized scheduling transmission according to the indication frame. Therefore, with the embodiment of the present invention, the station can transmit data on the specified random content channel according to the indication frame, and can also send data on the channel used for centralized scheduling transmission according to the indication frame.
  • the method of the embodiment of the present invention can further improve the real-time service, because the method for transmitting data by using the channel for centralized scheduling transmission has the advantage of the quality of service of the real-time service compared to the method of transmitting the data by using the specified random contention channel.
  • the quality of service improves the efficiency of wireless systems in the case of site-intensive deployment scenarios and large user volumes.
  • the network may be a Wifi network based on an unlicensed frequency band, or an LTE network, a CDMA network, or a GSM network in which a licensed frequency band is used.
  • a Wifi network an access point can allocate a random contention channel and a channel for centralized scheduling transmission.
  • some terminals can use the channel for centralized scheduling transmission for data transmission, that is, the data is transmitted on the channels in a centralized scheduling transmission mode to ensure the quality of service of the real-time service.
  • the station can transmit data on the designated random content channel after performing the backoff when the designated random content channel is in an idle state, it can reduce the collision of multiple sites when using the specified random contention channel. The probability.
  • Embodiment 2 of the present invention provides a data transmission method, where a random contention channel and a channel for centralized scheduling transmission exist in a network to which the method is applied, where the network is based on an unlicensed frequency band.
  • the network, or the network based on the licensed frequency band, the method may specifically include:
  • the station receives the indication frame sent by the access point.
  • the access point may send an indication frame over all channels or portions of the channel, the indication frame being used to specify a random contention channel for the station.
  • the indication frame contains frequency information of the specified random contention channel and time information of the competition.
  • the station monitors a channel state of the specified random contention channel according to the channel frequency information of the specified random contention channel.
  • the station may detect the signal strength on the specified random content channel according to the indication frame; when the detected signal strength on the specified random contention channel is less than or equal to a preset threshold, The designated random contention channel is in an idle state. 203. Obtain, according to the time information of the random contention included in the indication frame, a time of random competition in which the station sends data on the specified random contention channel.
  • the station After listening to the specified random contention channel being in an idle state, and during the random competition, the station performs backoff on the designated random contention channel.
  • the station After the end of the backoff time of the station, the station sends data on the designated random contention channel.
  • Step 1 The access point generates and sends an indication frame, and the indication frame includes frequency information of the specified random contention channel and time information of the random competition.
  • the time information of the random competition here is used to enable the station to send data within the specified random competition time, which may include the time start time point of the random competition and the length of the random competition time, or may also include: Fight for the window.
  • the access point may send an indication frame on all four channels in the network, or may transmit on only one channel, e.g., only on channel 4.
  • the indication frame designation channel 4 is a random contention channel, and the length of time for random competition is set. Go to step 2 after performing step 1.
  • Step 2 STA1 and STA2 receive the indication frame. At this time, STA1 needs to transmit data DATA 1 frame, STA2 needs to send DATA2 frame. STA1 randomly selects the backoff time as 2T, T represents the minimum unit of backoff time, and STA2 randomly chooses the backoff time to be 4T.
  • Step 3 STA 1 and STA 2 monitor the state of channel 4. After the idle time of the channel 4 reaches the time of the distributed coordination function interframe space (English: Distributed Coordination Function Interframe Space, abbreviation: DIFS), STA 1 and STA 2 perform backoff.
  • DIFS Distributed Coordination Function Interframe Space
  • Step 4 After the 2T time elapses, the STA 2 backoff time is reduced to 2T, and STA1 sends data.
  • Step 5 The access point receives the DATA 1 frame sent by STA 1.
  • Step 6 STA2 monitors the state of channel 4. If STA 1 has no service transmission request at this time, There is no need to listen to channel 4. After the idle time of channel 4 reaches the DIFS time, STA2 performs backoff. Step 7: After 2T time, STA2 sends a DATA2 frame.
  • Step 8 The access point receives the DATA 2 frame sent by STA 2.
  • the random content channel here can be used not only for the site to send data to the access point through competition, but also for device-to-device (English: Device to Device, abbreviation: D2D) communication. Ways to send data between sites by means of competition. D2D is also called Direct Link Setup (DLS) in the Wi-Fi standard. It means that two stations that can receive each other's wireless data frames can directly send data to each other without going through A means of communication for forwarding of an access point.
  • D2D Direct Link Setup
  • DLS Direct Link Setup
  • the site using the D2D communication method uses the random channel indicated by the access point for data transmission, the channel interception and random backoff procedures are the same as described above, except that the receiving station needs to be identified as D2D communication mode when the data is transmitted. Receiving site.
  • the site using the D2D communication method needs to keep receiving data on the random competition channel during non-data transmission, and identifying whether the received data frame is a data frame sent to the site, if yes, proceed Receive, if no, discard the received data frame.
  • the station may access the orthogonal frequency division multiple access during the random competition time.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM Orthogonal Frequency Division Multiplexing
  • the following steps may be used to determine whether the specified random content channel is in an idle state. Specifically, the station detects, on a spectrum, a signal strength on a subcarrier corresponding to the specified random contention channel; when the detected signal strength on the subcarrier corresponding to the specified random contention channel is less than or equal to When the threshold is predetermined, it is determined that the designated random content channel is in an idle state.
  • Embodiment 2 of the present invention can take the following technical means.
  • the indication frame sent by the site receiving access point further includes information of the specified site group, and if the site in the specified site group can listen to signals of other sites in the specified site group, then the specified site group When a station sends data through a random contention channel, it can avoid the situation where a hidden site is sent and a collision is sent. For example, multiple sites that are neighbors can be grouped according to the neighbor list of the site, so that each site in the group can monitor the signals of other sites in the group to avoid site hiding.
  • the station After receiving the indication frame, the station determines, according to the specified site group information, whether the site belongs to a specified site group that sends data through a random contention channel;
  • the station If it is determined that the station belongs to the designated station group, the station performs backoff on the designated random content channel when the designated random content channel is in an idle state.
  • the station After the end of the backoff time, the station transmits data on the designated random contention channel.
  • the indication frame includes group number information of the specified site group; the site acquires the group number of the specified site group according to the group number information of the specified site group; and the group number of the site group to which the site belongs When the group number of the obtained specified site group is the same, it is determined that the site belongs to the specified specified site group. After determining that the site belongs to the acquired specified site group, listening to the channel state of the specified random contention channel, after listening to the specified random contention channel being in an idle state, the site is in the designated The backoff is performed on the random competition channel. After the end of the backoff time, the station transmits data on the designated random contention channel.
  • STA1 and STA2 are divided into group 0, and STA 3 and STA 4 are grouped into group 1.
  • the four channels are independent of each other and do not interfere with each other.
  • the specific process of data transmission is as follows:
  • Step 1 The access point generates and sends an indication frame, and the indication frame includes frequency information of the specified random contention channel, time information of the random competition, and group number information of the specified station group.
  • the indication frame is specified Channel 4 is a random competing channel, sets the length of time for random competition, and specifies that group 0 can perform random competition.
  • Step 2 STA1, STA2, STA3, and STA4 receive the indication frame. Since STA1 and STA 2 belong to the 0th group, random competition can be performed; if STA3 and STA4 belong to the 1st group, random competition cannot be performed. STA1 selects the backoff time as 2T, T indicates the minimum unit of backoff time, and STA2 selects the backoff time as 4T.
  • Step 3 STA 1 and STA 2 monitor the state of channel 4. After the idle time of channel 4 reaches the DIFS time, STA 1 and STA 2 perform backoff.
  • Step 4 After 2 lapses, STA 2's backoff time is reduced to 2 ⁇ , and STA1 sends data DATA1 frame.
  • Step 5 The access point receives the DATA 1 frame sent by STA 1.
  • Step 6 STA2 monitors the status of channel 4. If STA 1 has no service transmission requirement at this time, there is no need to monitor channel 4. After the idle time of channel 4 reaches the DIFS time, STA2 performs backoff.
  • Step 7 After 2T time, STA2 sends a DATA2 frame.
  • Step 8 The access point receives the DATA 2 frame sent by STA 2.
  • the indication frame may include periodic time information of random competition, and the periodic time information of the random competition is used to indicate the periodic time of the random competition that the station has, and the station may be in the cycle time. send data.
  • the station may acquire, according to the periodic time information of the random content included in the indication frame, a period of random competition of the data sent by the station on the specified random channel, and During the periodic period of random competition, data is transmitted on the designated random contention channel. Therefore, the access point sends the indication frame once, which enables the station to send data within the cycle time, thereby reducing the number of times the random indication frame is transmitted.
  • Step 1 The access point generates and sends an indication frame, indicating that the frame contains the frequency of the specified random contention channel.
  • the rate information and the time information of the random competition wherein the time information of the random competition may specifically be the cycle time of the random competition.
  • the access point may send the indication frame on all four channels in the network, or may only transmit on one channel, for example only on channel 4. After performing step 1, go to step 2.
  • Step 2 STA 1 and STA 2 receive the indication frame.
  • STA 1 needs to send DATA 1 frame
  • STA 2 needs to send DATA 2 frame.
  • STA1 randomly selects the backoff time as 2T
  • T represents the minimum unit of backoff time
  • STA2 randomly selects the backoff time as 4T.
  • Step 3 STA 1 and STA 2 monitor the state of channel 4. After the idle time of channel 4 reaches the DIFS time, STA 1 and STA 2 perform backoff.
  • Step 4 After 2 lapses, STA 2's backoff time is reduced to 2 ⁇ , and STA1 sends data DATA1 frame.
  • Step 5 The access point receives the DATA 1 frame sent by STA 1.
  • Step 6 STA2 monitors the status of channel 4. If STA 1 has no service transmission requirement at this time, there is no need to monitor channel 4. After the idle time of channel 4 reaches the DIFS time, STA2 performs backoff.
  • Step 7 After 2T time, STA2 sends a DATA2 frame.
  • Step 8 The access point receives the DATA 2 frame sent by STA 2.
  • STA1 and STA2 wait for the cycle time of the next random competition, and repeat the steps of steps 3 to 8.
  • the station may transmit data to an access point or another station on a designated channel.
  • the site is a site, and the site can not only send data to the access point by the above method, but also can send data to another site by the above method.
  • Step 1 The access point generates and sends an indication frame, and the indication frame includes frequency information of the specified random contention channel and time information of the random competition.
  • Step 2 STA1 and STA2 receive the indication frame. At this time, STA1 needs to transmit data DATA1 frame, and STA2 does not need to send data. STA1 randomly chooses the backoff time to be 4T, and T indicates the minimum backoff time. Unit, STA1 randomly chooses the backoff time to be 2T.
  • Step 3 STA 1 monitors the state of channel 4. After the idle time of channel 4 reaches the DIFS time, STA 1 performs backoff.
  • Step 4 After 4 lapses, STA 1 sends a DATA1 frame to STA2.
  • Step 5 STA 2 receives the DATA 1 frame sent by STA1 and generates an ACK 1 frame.
  • Step 6 STA 2 monitors the state of channel 4. After the idle time of channel 4 reaches the DIFS time, STA 2 performs backoff.
  • Step 7 After 2 lapses, STA 2 sends a response ACK 1 frame to STA1.
  • Step 8 STA 1 receives the ACK 1 frame sent by STA 2.
  • the embodiment 4 of the present invention provides a station 301, where the station 301 includes: a receiving unit 302, configured to receive an indication frame sent by an access point, where the indication frame is used to specify a random contention channel;
  • the monitoring unit 303 is configured to monitor, according to the indication frame received by the receiving unit 302, a channel state of the specified random contention channel;
  • the sending unit 304 is configured to send data on the specified random content channel after the listening unit 303 monitors that the specified random content channel is in an idle state.
  • Embodiment 4 of the present invention provides a station 401, where the station 401 includes: a receiving unit 402, configured to receive an indication frame sent by an access point, where the indication frame includes a specified random contention channel. channel;
  • the monitoring unit 403 is configured to monitor, according to the indication frame received by the receiving unit 402, a channel state of the specified random contention channel;
  • the sending unit 404 is configured to send data on the specified random content channel after the listening unit 403 monitors that the specified random content channel is in an idle state.
  • the sending unit 404 is configured to perform backoff on the specified random content channel after the listening unit 403 detects that the specified random content channel is in an idle state, including:
  • the receiving unit 402 is configured to receive the indication frame sent by the access point, and the method includes: receiving, by the access point, an indication frame, where the indication frame includes channel frequency information of the specified random contention channel;
  • the monitoring unit 403 is configured to monitor, according to the indication frame received by the receiving unit 402, the channel state of the specified random contention channel, including:
  • the channel state of the specified random contention channel is monitored, according to the channel frequency information of the specified random content channel received by the receiving unit 402, the channel state of the specified random contention channel.
  • the receiving unit 402 is configured to receive the indication frame sent by the access point, and the method includes: receiving, by the access point, an indication frame, where the indication frame includes time information of random competition; And being further configured to acquire, according to the received time information of the random content included in the indication frame, a time of random competition in which the station sends data on the specified random competition channel;
  • the sending unit 404 is configured to send data on the specified random content channel after the listening unit 403 detects that the specified random content channel is in an idle state, including:
  • the monitoring unit 403 is configured to monitor, according to the indication frame received by the receiving unit 402, the channel state of the specified random contention channel, including:
  • the sending unit 404 is configured to monitor, according to the indication frame received by the receiving unit 402, the channel state of the specified random contention channel, including:
  • the station detects, on a spectrum, a signal strength on a subcarrier corresponding to the specified random contention channel;
  • the receiving unit 402 is configured to receive the indication frame sent by the access point, including: An indication frame sent by the access point, where the indication frame includes periodic time information of random competition; the receiving unit 402 is further configured to: according to the received periodic time information of the random competition included in the indication frame, Obtaining a periodic time of random competition in which the station transmits data on the specified random content channel;
  • the monitoring unit 403 is configured to monitor, according to the indication frame received by the receiving unit 402, the channel state of the specified random contention channel, including:
  • the sending unit 404 is configured to: after the listening unit 403 detects that the specified random contention channel is in an idle state, send data on the specified random contention channel, including: The listening unit 403, after listening to the specified random contention channel being in an idle state, transmits data to the access point or another station on the designated random contention channel.
  • the receiving unit 402 is configured to receive the indication frame sent by the access point, where the receiving unit 402 is configured to receive an indication frame sent by the access point, where the indication frame is further used for allocation for centralized scheduling. Transmitted channel;
  • the sending unit 404 is further configured to send data on the channel for centralized scheduling transmission according to the indication frame received by the receiving unit 402.
  • the sending unit 404 is configured to send data on the specified random content channel after detecting that the specified random content channel is in an idle state, including:
  • the receiving unit 402 is further configured to receive an indication frame sent by the access point, where the indication frame includes group number information of the specified site 401 group, and the site 401 in the specified site 401 group can be monitored.
  • the signals of the other stations 401 in the group of the designated stations 401, the stations 401 in the group of the specified stations 401 send data through a random contention channel;
  • the sending unit 404 is further configured to determine, according to the information of the specified site group received by the receiving unit 402, whether the site 401 belongs to the specified site group, and if the site 401 is determined to belong to the specified site group. , after listening to the specified random contention channel being idle, Backoff is performed on the specified random contention channel. A site belonging to the specified site group may be able to listen to signals from other sites in the specified site group.
  • the receiving unit 402 is further configured to receive an indication frame sent by the access point, where the indication frame includes group number information of the specified site group;
  • the sending unit 404 is further configured to obtain, according to the group number information of the specified site group, the group number of the specified site group; when the group number of the site group to which the site 401 belongs and the obtained specified site group When the group numbers are the same, it is judged that the station 401 belongs to the specified station group.
  • Embodiment 5 of the present invention provides a station 501, where a random contention channel and a channel for centralized scheduling transmission exist in a network where the station 501 is located, where the network is based on an unlicensed frequency band. Network, or a network based on licensed bands.
  • the site 501 includes:
  • the receiver 502 is configured to receive an indication frame sent by the access point, where the indication frame is used to specify a random competition channel.
  • the processor 503 is configured to monitor, according to the indication frame received by the receiver 502, a channel state of the specified random contention channel;
  • the transmitter 504 is configured to send data on the designated random contention channel after the processor 503 monitors that the specified random contention channel is in an idle state.
  • the transmitter 504 is configured to: after the processor 503 monitors that the specified random contention channel is in an idle state, send data on the specified random contention channel, including:
  • the receiver 502 is further configured to receive an indication frame sent by the access point, where the indication frame includes channel frequency information of the specified random contention channel;
  • the processor 503 is further configured to monitor, according to the channel frequency information of the specified random content channel included in the indication frame received by the receiver 502, the channel state of the specified random contention channel.
  • the receiver 502 is further configured to receive an indication frame sent by the access point, where the indication frame includes time information of random competition;
  • the processor 503 is further configured to: according to the indication frame included in the receiver 502, The time information of the machine competition, obtaining the time of the random competition in which the station 501 transmits data on the specified random competition channel;
  • the transmitter 504 is further configured to: after the processor 503 detects that the specified random contention channel is in an idle state, and send data on the specified random contention channel within the time of the random competition .
  • the processor 503 is further configured to detect, according to the indication frame, a signal strength on the specified random contention channel; when the detected signal strength on the specified random contention channel is less than or When it is equal to the preset threshold, it is determined that the specified random content channel is in an idle state.
  • the processor 503 is further configured to: according to the indication frame, detect, on a spectrum, a signal strength on a subcarrier corresponding to the specified random content channel; when the specified random content is detected When the signal strength on the subcarrier corresponding to the channel is less than or equal to a predetermined threshold, it is determined that the specified random contention channel is in an idle state.
  • the receiver 502 is further configured to receive an indication frame sent by the access point, where the indication frame includes periodic time information of random competition;
  • the processor 503 is further configured to acquire, according to the periodic time information of the random content included in the indication frame, a period of random competition of the station to send data on the specified random content channel;
  • the transmitter 504 is configured to: after the processor 503 monitors that the specified random contention channel is in an idle state, and in the random competitive period, on the designated random contention channel send data.
  • the transmitter 504 is configured to: after the processor 503 monitors that the specified random contention channel is in an idle state, send data on the specified random contention channel, including:
  • the transmitter 504 is configured to send data to the access point or another station on the designated random contention channel after the processor 503 monitors that the specified random contention channel is in an idle state.
  • the receiver 502 is further configured to receive an indication frame sent by an access point, where the indication frame is further used to allocate a channel for centralized scheduling transmission;
  • the transmitter 504 is configured to transmit data on the channel for centralized scheduling transmission according to the indication frame.
  • the transmitter 504 is configured to listen to the specified random contention in the processor 503. After the channel is in an idle state, transmitting data on the specified random contention channel includes: the transmitter 504 is configured to access the OFDMA in an orthogonal frequency division multiple access manner on the designated random contention channel. Transmitting data, wherein the random contention channel and the channel for centralized scheduling transmission satisfy orthogonal frequency division OFDM symbol synchronization.
  • the receiver 502 is further configured to receive an indication frame sent by the access point, where the indication frame includes information of a specified site group, where the site 501 in the specified site group can be monitored in the specified site group. Signals of other stations 501, the stations 501 in the specified group of stations transmit data through a random contention channel;
  • the processor 503 is further configured to determine, according to the information of the specified site group included in the indication frame received by the receiver 502, whether the site 501 belongs to the specified site group; The designated site group, when the designated random contention channel is in an idle state, the station 501 performs backoff on the designated random contention channel.
  • the receiver 502 is further configured to receive an indication frame sent by an access point, where the indication frame includes group number information of the specified site group;
  • the processor 503 is further configured to obtain, according to the group number information of the specified site group included in the indication frame received by the receiver 502, a group number of the specified site group; when the site group to which the site 501 belongs When the group number is the same as the group number of the specified site group, it is determined that the site 501 belongs to the specified site group.
  • the receiver 502 is further configured to receive an indication frame sent by the access point, where the indication frame includes periodic time information of random competition;
  • the processor 503 is further configured to obtain, according to the periodic time information of the random content included in the indication frame received by the receiver 502, the random content that the station 501 sends data on the specified random contention channel. Cycle time
  • the transmitter 504 is further configured to transmit data on the designated random contention channel within a time of random competition within the random competition cycle time obtained by the processor 503.
  • the transmitter 504 is configured to send data to the access point or another site 501 on the designated random content channel.
  • the receiver 502 is configured to receive an indication frame sent by an access point, where the indication frame is further used to allocate a channel for centralized scheduling transmission;
  • the transmitter 504 is further configured to send data on the channel for centralized scheduling transmission according to the indication frame received by the receiver 502.
  • the present invention further provides a computer storage medium, wherein the computer storage medium may store a program, and when the program is executed, may include a part of each embodiment of the virtual network-based switch configuration method provided by the present invention. Or all steps.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明提供一种数据传输方法。在本发明方法中,站点接收接入点发送的指示帧,指示帧用于分配指定的随机竞争信道;根据指示帧,监听指定的随机竞争信道的信道状态;在监听到指定的随机竞争信道处于空闲状态后,站点在指定的随机竞争信道上发送数据。由于本发明方法通过为站点分配指定的随机竞争信道,使得站点可以在指定的随机竞争信道上发送数据,从而减少站点之间的竞争,减少站点接入随机竞争信道的时间。

Description

一种数据传输方法及站点 技术领域
本发明涉及无线通信技术领域, 特别是涉及一种数据传输方法及站点。 背景技术
在现有无线网络通信中, 一般釆用随机竟争的方式使用非授权频谱进行数 据传输。 例如, 在无线局域网络(Wireless Local Area Networks, WLAN )、 蓝 牙等网络中使用随机竟争的方式进行数据传输。当釆用随机竟争的方式进行数 据传输时, 不同无线网络之间的地位对等, 并且同一无线网络中的不同站点之 间的地位也对等, 所有站点共享无线网络中的所有随机竟争信道。 但是, 当无 线网络中部署的站点越多时,站点接入共享的随机竟争信道所需的平均时间也 越长, 这导致无线网络的实时业务的服务质量缺乏保障。 发明内容
本发明的目的在于提供一种数据传输方法。通过该方法, 可以减少站点之 间的竟争, 从而减少站点接入随机竟争信道的时间。
本发明第一方面提供一种数据传输方法, 包括:
站点接收接入点发送的指示帧, 所述指示帧用于分配指定的随机竟争信 道;
根据所述指示帧, 监听所述指定的随机竟争信道的信道状态;
在监听到所述指定的随机竟争信道处于空闲状态后,所述站点在所述指定 的随机竟争信道上发送数据。
结合本发明第一方面,在第一方面的第一种可能实现方式中, 所述在监听 到所述指定的随机竟争信道处于空闲状态后,所述站点在所述指定的随机竟争 信道上发送数据, 包括:
在监听到所述指定的随机竟争信道处于空闲状态后,所述站点在所述指定 的随机竟争信道上执行退避;
在所述站点的退避时间结束之后,所述站点在所述指定的随机竟争信道上 发送数据。 结合本发明第一方面或第一方面的第一种可能实现方式,在第一方面的第 二种可能实现方式中, 所述站点接收接入点发送的指示帧, 包括:
接收接入点发送的指示帧 ,所述指示帧包含指定的随机竟争信道的信道频 率信息;
所述根据所述指示帧, 监听所述指定的随机竟争信道的信道状态, 包括: 根据所述指定的随机竟争信道的信道频率信息 ,监听所述指定的随机竟争 信道的信道状态。
结合本发明第一方面或第一方面的第一或第二种可能实现方式,在第一方 面的第三种可能实现方式中, 所述接收接入点发送的指示帧, 包括:
接收接入点发送的指示帧, 所述指示帧包含随机竟争的时间信息; 所述方法还包括:
根据所述指示帧中包含的随机竟争的时间信息,获取所述站点在所述指定 的随机竟争信道上发送数据的随机竟争的时间;
所述在监听到所述指定的随机竟争信道处于空闲状态后,所述站点在所述 指定的随机竟争信道上发送数据, 包括:
在监听到所述指定的随机竟争信道处于空闲状态后,而且在所述随机竟争 的时间内, 在所述指定的随机竟争信道上发送数据。
结合本发明第一方面或第一方面的第一至第三任意一种可能实现方式,在 第一方面的第四种可能实现方式中, 所述根据所述指示帧,监听所述指定的随 机竟争信道的信道状态, 包括:
所述站点根据所述指示帧, 检测所述指定的随机竟争信道上的信号强度; 当检测到的所述指定的随机竟争信道上的信号强度小于或等于预设的阈 值时, 则判断所述指定的随机竟争信道处于空闲状态。
结合本发明第一方面或第一方面的第一至第三任意一种可能实现方式,在 第一方面的第五种可能实现方式中, 所述根据所述指示帧,监听所述指定的随 机竟争信道的信道状态, 包括:
所述站点在频谱上检测所述指定的随机竟争信道对应的子载波上的信号 强度;
当检测到的所述指定的随机竟争信道对应的子载波上的信号强度小于或 等于预定的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
结合本发明第一方面或第一方面的第一至第二任意一种可能实现方式,在 第一方面的第六种可能实现方式中, 所述接收接入点发送的指示帧, 包括: 所述接收接入点发送的指示帧, 所述指示帧包含随机竟争的周期时间信 息;
所述方法还包括:
根据所述指示帧中包含的随机竟争的周期时间信息,获取所述站点在所述 指定的随机竟争信道上发送数据的随机竟争的周期时间;
所述在监听到所述指定的随机竟争信道处于空闲状态后,所述站点在所述 指定的随机竟争信道上发送数据, 包括:
在监听到所述指定的随机竟争信道处于空闲状态后,而且在所述随机竟争 的周期时间内, 在所述指定的随机竟争信道上发送数据。
结合本发明第一方面或第一方面的第一至第六任意一种可能实现方式,在 第一方面的第七种可能实现方式中 ,所述站点在监听到所述指定的随机竟争信 道处于空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括:
所述站点在监听到所述指定的随机竟争信道处于空闲状态后,在所述指定 的随机竟争信道上向接入点或另一站点发送数据。
结合本发明第一方面或第一方面的第一至第七任意一种可能实现方式,在 第一方面的第八种可能实现方式中,所述指示帧还用于分配用于集中调度传输 的信道;
所述方法还包括: 根据所述指示帧,在所述用于集中调度传输的信道上发 送数据。
结合本发明第一方面的第八种可能实现方式,在第一方面的第九种可能实 现方式中, 所述在监听到所述指定的随机竟争信道处于空闲状态后, 所述站点 在所述指定的随机竟争信道上发送数据, 包括:
所述站点以正交频分多址接入 OFDMA的方式在所述指定的随机竟争信 道上发送数据, 其中, 所述随机竟争信道和所述用于集中调度传输的信道满足 正交频分 OFDM符号同步。
本发明第二方面提供一种站点, 包括: 接收单元, 用于接收接入点发送的指示帧, 所述指示帧用于指定随机竟争 信道;
监听单元, 用于根据所述接收单元接收的所述指示帧,监听所述指定的随 机竟争信道的信道状态;
发送单元,用于在所述监听单元监听到所述指定的随机竟争信道处于空闲 状态后, 在所述指定的随机竟争信道上发送数据。
结合本发明第二方面,在第二方面的第一种可能实现方式中, 所述发送单 元用于在所述监听单元监听到所述指定的随机竟争信道处于空闲状态后,在所 述指定的随机竟争信道上执行退避, 包括:
用于: 在所述监听单元监听到所述指定的随机竟争信道处于空闲状态后, 在所述指定的随机竟争信道上执行退避; 在所述站点的退避时间结束之后, 在 所述指定的随机竟争信道上发送数据。
结合本发明第二方面或第二方面的第一种可能实现方式,在第二方面的第 二种可能实现方式中, 所述接收单元用于接收接入点发送的指示帧, 包括: 用于接收接入点发送的指示帧,所述指示帧包含指定的随机竟争信道的信 道频率信息;
所述监听单元用于根据所述接收单元接收的所述指示帧,监听所述指定的 随机竟争信道的信道状态, 包括:
用于根据所述接收单元接收到的所述指定的随机竟争信道的信道频率信 息, 监听所述指定的随机竟争信道的信道状态。
结合本发明第二方面或第二方面的第一或第二种可能实现方式,在第二方 面的第三种可能实现方式中, 所述接收单元用于接收接入点发送的指示帧, 包 括:
用于接收接入点发送的指示帧, 所述指示帧包含随机竟争的时间信息; 所述接收单元还用于根据接收到的所述指示帧中包含的随机竟争的时间 信息, 获取所述站点在所述指定的随机竟争信道上发送数据的随机竟争的时 间;
所述发送单元用于在所述监听单元监听到所述指定的随机竟争信道处于 空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括: 用于在所述监听单元监听到所述指定的随机竟争信道处于空闲状态后,而 且在所述接收单元获取的所述随机竟争的时间内,在所述指定的随机竟争信道 上发送数据。
结合本发明第二方面或第二方面的第一至第三任意一种可能实现方式,在 第二方面的第四种可能实现方式中,所述监听单元用于根据所述接收单元接收 的所述指示帧, 监听所述指定的随机竟争信道的信道状态, 包括:
用于根据所述接收单元接收的所述指示帧,检测所述指定的随机竟争信道 上的信号强度;当检测到所述指定的随机竟争信道上的信号强度小于或等于预 设的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
结合本发明第二方面或第二方面的第一至第三任意一种可能实现方式,在 第二方面的第五种可能实现方式中,所述发送单元用于根据所述接收单元接收 的所述指示帧, 监听所述指定的随机竟争信道的信道状态, 包括:
所述站点在频谱上检测所述指定的随机竟争信道对应的子载波上的信号 强度;
当检测到的所述指定的随机竟争信道对应的子载波上的信号强度小于或 等于预定的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
结合本发明第二方面或第二方面的第一至第二任意一种可能实现方式,在 第二方面的第六种可能实现方式中,所述接收单元用于接收接入点发送的指示 帧, 包括:
用于接入点发送的指示帧, 所述指示帧包含随机竟争的周期时间信息; 所述接收单元还用于根据接收到的所述指示帧中包含的随机竟争的周期 时间信息 ,获取所述站点在所述指定的随机竟争信道上发送数据的随机竟争的 周期时间;
所述监听单元用于根据所述接收单元接收的所述指示帧,监听所述指定的 随机竟争信道的信道状态, 包括:
用于在监听到所述指定的随机竟争信道处于空闲状态后,而且在所述随机 竟争的周期时间内, 在所述指定的随机竟争信道上发送数据。
结合本发明第二方面或第二方面的第一至第六任意一种可能实现方式,在 第二方面的第七种可能实现方式中,所述发送单元用于在所述监听单元监听到 所述指定的随机竟争信道处于空闲状态后 ,在所述指定的随机竟争信道上发送 数据, 包括:
用于在所述监听单元监听到所述指定的随机竟争信道处于空闲状态后,在 所述指定的随机竟争信道上向接入点或另一站点发送数据。
结合本发明第二方面或第二方面的第一至第七任意一种可能实现方式,在 第二方面的第八种可能实现方式中,所述接收单元用于接收接入点发送的指示 帧, 包括:
所述接收单元用于接收接入点发送的指示帧,所述指示帧还用于分配用于 集中调度传输的信道;
所述发送单元还用于根据所述接收单元接收到的所述指示帧,在所述用于 集中调度传输的信道上发送数据。
结合本发明第二方面的第八种可能实现方式,在第二方面的第九种可能实 现方式中,所述发送单元用于在监听到所述指定的随机竟争信道处于空闲状态 后, 在所述指定的随机竟争信道上发送数据, 包括:
用于以正交频分多址接入 OFDMA的方式在所述指定的随机竟争信道上 发送数据, 其中, 所述随机竟争信道和所述用于集中调度传输的信道满足正交 频分 OFDM符号同步。
在本发明方法中, 站点根据所述指示帧, 在所述指示帧指定的随机竟争信 道上发送数据。 因此, 本发明方法可以为不同站点分配不同的随机竟争信道进 行数据传输, 能够减少站点之间的竟争,从而减少站点接入随机竟争信道的时 间, 保障无线网络的实时业务的服务质量, 提高网络传输数据的效率。 附图说明
图 1是实施例 1提供的一种数据传输方法的流程示意图;
图 2是实施例 2提供的另一种数据传输方法的流程示意图;
图 3是一种应用场景中的数据传输示意图;
图 4是另一种应用场景中的数据传输示意图;
图 5是又一种应用场景中的数据传输示意图;
图 6是实施例 3提供的一种站点的结构框图;
图 7是实施例 4提供的一种站点的结构框图; 图 8是实施例 5提供的一种站点的结构框图。 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作出创造 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。
如图 1所示, 本发明实施例 1提供了一种数据传输方法, 该方法具体可以包 括:
101、 站点接收接入点发送的指示帧, 所述指示帧用于分配指定的随机竟 争信道。
接入点可以通过所有信道或部分信道发送指示帧。
102、 根据所述指示帧, 监听所述指定的随机竟争信道的信道状态。
例如, 所述指示帧可以包含指定的随机竟争信道的信道频率信息, 站点可 以根据所述指定的随机竟争信道的信道频率信息 ,确定所述指定的随机竟争信 道, 监听所述指定的随机竟争信道的信道状态。
103、 在监听到所述指定的随机竟争信道处于空闲状态后, 所述站点在所 述指定的随机竟争信道上发送数据。
在本实施例中, 由于站点根据所述指示帧, 在指定的随机竟争信道上发送 数据。 因此, 该方法可以为不同站点分配不同的随机竟争信道进行数据传输, 从而降低站点之间的竟争, 减少站点接入随机竟争信道的时间,从而保障无线 网络的实时业务的服务质量, 提高网络传输数据的效率。
为了避免站点在接入所述指定的随机竟争信道时与其他站点发生冲突,所 述步骤 103具体可以包括:站点可以在监听到所述指定的随机竟争信道处于空 闲状态后,在所述指定的随机竟争信道上执行退避。在所述站点的退避时间结 束之后, 所述站点在所述指定的随机竟争信道上发送数据。
另外, 在本发明实施例 1中, 指定的随机竟争信道可以只占用站点与接入 点之间的部分信道资源, 而剩余的部分信道资源可以作为集中调度传输的信 道。为了充分利用信道资源,本发明实施例还可以釆取以下技术措施。具体的, 站点接收接入点发送的指示帧还可以用于分配用于集中调度传输的信道;站点 根据所述指示帧, 在所述用于集中调度传输的信道上发送数据。 因此, 应用本 发明实施例, 站点既能够根据指示帧在指定的随机竟争信道上发送数据, 又能 够根据指示帧在用于集中调度传输的信道上发送数据。由于使用用于集中调度 传输的信道发送数据的方式相较于使用指定的随机竟争信道发送数据的方式, 具有实时业务的服务质量好的优点, 因此, 本发明实施例方法能够进一步提升 实时业务的服务质量,提高无线系统在站点密集部署场景和大用户量情况下的 效率。
在本发明实施例 1中, 所述网络可以为基于非授权频段的 Wifi网络, 也可 以^^于授权频段的 LTE网络、 CDMA网络或 GSM网络等。 例如, 在 Wifi网络 中,接入点可以分配随机竟争信道和用于集中调度传输的信道。 当大量用户终 端通过 Wifi网络进行无线通信时, 部分终端可以使用用于集中调度传输的信道 进行数据发送, 即在这些信道上釆用集中调度传输的模式发送数据, 以保证实 时业务的服务质量。 当用户终端需要发送大量短包数据时,部分终端可以使用 随机竟争信道进行数据发送, 即在这些信道上釆用随机竟争的模式发送数据, 从而可以减少系统开销, 提高系统灵活性。 此外, 由于站点可以在指定的随机 竟争信道处于空闲状态时,在执行退避之后,在指定的随机竟争信道上发送数 据, 因此可以减少多个站点在使用指定的随机竟争信道时发生冲突的概率。
如图 2所示, 本发明实施例 2提供了一种数据传输方法,在应用该方法的网 络中存在随机竟争信道和用于集中调度传输的信道, 其中, 所述网络为基于非 授权频段的网络, 或为基于授权频段的网络, 该方法具体可以包括:
201、 站点接收接入点发送的指示帧。
接入点可以通过所有信道或部分信道发送指示帧,指示帧用于为站点指定 随机竟争信道。所述指示帧包含指定的随机竟争信道的频率信息和竟争的时间 信息。
202、 站点根据所述指定的随机竟争信道的信道频率信息, 监听所述指定 的随机竟争信道的信道状态。
例如,站点可以根据所述指示帧检测所述指定的随机竟争信道上的信号强 度;当检测到的所述指定的随机竟争信道上的信号强度小于或等于预设的阈值 时, 则判断所述指定的随机竟争信道处于空闲状态。 203、 根据所述指示帧中包含的随机竟争的时间信息, 获取所述站点在指 定的随机竟争信道上发送数据的随机竟争的时间。
204、 在监听到所述指定的随机竟争信道处于空闲状态后, 而且在所述随 机竟争的时间内, 所述站点在所述指定的随机竟争信道上执行退避。
205、 在所述站点的退避时间结束之后, 所述站点在所述指定的随机竟争 信道上发送数据。
以下结合具体应用场景对上述内容做进一步的说明。
假设网络中设有一个接入点和两个站点, 两个站点分别是站点 STA1和站 点 STA2, 这两个站点均需要在随机竟争信道发送数据, 而且能够互相监听到 对方的信号。 该网络中具有 4个可用的信道, 分别为信道 1、 信道 2、 信道 3和信 道 4。 如图 3所示, 数据传输的具体的流程如下:
步骤 1 : 接入点生成并发送指示帧, 指示帧包含指定的随机竟争信道的频 率信息和随机竟争的时间信息。这里随机竟争的时间信息用于使站点在指定的 随机竟争的时间内发送数据,其可以包括随机竟争的时间开始时间点和随机竟 争的时间长度, 或者, 还可以包括: 随机竟争窗口。 接入点可以在网络中所有 的 4个信道上发送指示帧 ,也可以只在一个信道上发送,例如只在信道 4上发送。 在图 3中,指示帧指定信道 4为随机竟争信道,并且设定了随机竟争的时间长度。 在执行步骤 1之后转入步骤 2。
步骤 2: STA1和 STA2接收指示帧。 此时, STA1需要发送数据 DATA 1帧, STA2需要发送 DATA2帧。 STA1随机选择退避时间为 2T, T表示退避时间的最 小单位 , STA2随机选择退避时间为 4T。
步骤 3: STA 1和 STA 2监听信道 4的状态。 在信道 4的空闲时间达到分布协 调功能帧间间隔 (英文: Distributed Coordination Function Interframe Space, 缩 写: DIFS ) 时间之后, STA 1和 STA 2执行退避。
步骤 4: 在经过 2T时间之后, STA 2的退避时间减少为 2T, STA1发送数据
DATA1帧。
步骤 5: 接入点接收 STA 1发送的 DATA 1帧。
步骤 6: STA2监听信道 4的状态。 若此时 STA 1已经没有业务发送需求, 则无需监听信道 4。在信道 4的空闲时间达到 DIFS时间之后, STA2执行退避。 步骤 7: 经过 2T时间之后, STA2发送 DATA2帧。
步骤 8: 接入点接收 STA 2发送的 DATA 2帧。
这里需要强调的是,这里的随机竟争信道不仅可以用于站点通过竟争的方 式给接入点发送数据, 还可以用于釆用设备到设备(英文: Device to Device , 缩写: D2D )通信方式的站点之间通过竟争的方式发送数据。 D2D在 Wi-Fi标 准中又叫直接链路建立(英文: Direct link setup, 缩写: DLS ), 它是指两个可 以互相接收到对方无线数据帧的站点直接将数据发送给对方,而不用经过接入 点的转发的一种通信方式。当釆用 D2D通信方式的站点使用接入点指示的随机 信道进行数据发送的时候,信道监听和随机退避过程与前面描述相同, 只是需 要在数据发送的时候将接收站点标识为釆用 D2D通信方式的接收站点。另外当 釆用 D2D通信方式的站点在非数据发送的时候需要保持对随机竟争信道上的 数据进行接收,并且识别接收到的数据帧是否是发送给本站点的数据帧,若是, 则进行接收, 若否, 则丟弃接收到的数据帧。
由于用于集中调度传输的信道包含调度信道,为了避免调度信道与随机竟 争信道在发送数据时发生相互干扰,在所述随机竟争的时间内, 站点可以以正 交频分多址接入 (英文: Orthogonal Frequency Division Multiple Access, 缩写: OFDMA ) 的方式在指定的随机竟争信道上发送数据, 其中, 所述随机竟争信 道和所述用于集中调度传输的信道满足正交频分 (英文: Orthogonal Frequency Division Multiplexing, 缩写: OFDM )符号同步。
在站点以 OFDMA的方式在指定的随机竟争信道上发送数据之前, 可以通 过如下步骤判断指定的随机竟争信道是否处于空闲状态。具体的, 所述站点在 频谱上检测所述指定的随机竟争信道对应的子载波上的信号强度;当检测到的 所述指定的随机竟争信道对应的子载波上的信号强度小于或等于预定的阈值 时, 则判断所述指定的随机竟争信道处于空闲状态。
由于网络中的站点并不都处理相同类型的业务,站点与站点之间可能无法 相互监听到对方的信号,从而造成隐藏站点的问题,使得不同站点在发送数据 时容易产生冲突。 为了避免此问题, 本发明实施例 2可以釆取以下技术手段。 具体的, 站点接收接入点发送的指示帧还包含指定站点组的信息,如果所 述指定站点组中的站点能监听到所述指定站点组中的其它站点的信号,那么指 定站点组中的站点通过随机竟争信道发送数据的时候就可以避免出现隐藏站 点而发送冲突的情况。例如, 可以根据站点的邻居列表将互为邻居的多个站点 分为一组,使得组内的每个站点都能够监听到组内的其他站点的信号,避免站 点隐藏。
站点在接收到所述指示帧之后,根据所述指定站点组信息, 判断所述站点 是否属于通过随机竟争信道发送数据的指定站点组;
若判断所述站点属于所述指定站点组,则在当所述指定的随机竟争信道处 于空闲状态时, 所述站点在所述指定的随机竟争信道上执行退避。
在退避的时间结束之后, 所述站点在所述指定的随机竟争信道上发送数 据。
更进一步的, 所述指示帧包含指定站点组的组号信息; 站点根据所述指定 站点组的组号信息, 获取所述指定站点组的组号; 当所述站点所属的站点组的 组号与获取的指定站点组的组号相同时,则判断所述站点属于获取的指定站点 组。在判断所述站点属于获取的指定站点组之后,监听所述指定的随机竟争信 道的信道状态,在监听到所述指定的随机竟争信道处于空闲状态后, 所述站点 在所述指定的随机竟争信道上执行退避。在退避的时间结束之后, 所述站点在 所述指定的随机竟争信道上发送数据。
以下结合具体应用场景对上述内容做进一步的说明。
假设网络中设有一个接入点和四个站点, 四个站点分别是站点 STA1、 站 点 STA2、 站点 STA3和站点 STA4, 其中 STA 1和 STA 2可以彼此监听到对方的信 号, 但是不能监听到 STA 3和 STA 4的信号; STA3和 STA4可以彼此监听到对方 的信号, 但是不能监听到 STA1和 STA2的信号。 因此, 将 STA1和 STA2分为 0号 组, STA 3和 STA 4分为 1号组。 该网络中具有四个可用的信道, 分别为信道 1、 信道 2、 信道 3和信道 4, 四个信道之间相互独立, 互不干扰。 数据传输的具体 的流程如下:
步骤 1 : 接入点生成并发送指示帧, 指示帧包含指定的随机竟争信道的频 率信息、 随机竟争的时间信息和指定站点组的组号信息。 在此处, 指示帧指定 信道 4为随机竟争信道,设定了随机竟争的时间长度, 并且指定了 0号组可以进 行随机竟争。
步骤 2: STA1、 STA2、 STA3和 STA4接收指示帧。 由于 STA1和 STA 2属于 0 号组, 则可以进行随机竟争; STA3和 STA4属于 1号组则无法进行随机竟争。 STA1选择退避时间为 2T, T表示退避时间的最小单位, STA2选择退避时间为 4T。
步骤 3: STA 1和 STA 2监听信道 4的状态。 在信道 4的空闲时间达到 DIFS时 间之后 , STA 1和 STA 2执行退避。
步骤 4: 在经过 2Τ时间之后, STA 2的退避时间减少为 2Τ, STA1发送数据 DATA1帧。
步骤 5: 接入点接收 STA 1发送的 DATA 1帧。
步骤 6: STA2监听信道 4的状态。 若此时 STA 1已经没有业务发送需求, 则无需监听信道 4。在信道 4的空闲时间达到 DIFS时间之后, STA2执行退避。
步骤 7: 经过 2T时间之后, STA2发送 DATA2帧。
步骤 8: 接入点接收 STA 2发送的 DATA 2帧。
在本发明实施例 2中, 所述指示帧中可以包括随机竟争的周期时间信息, 随机竟争的周期时间信息用于表示站点具有的随机竟争的周期时间,站点可以 在这周期时间内发送数据。站点在接收到指示帧之后, 可以根据所述指示帧中 包含的随机竟争的周期时间信息 ,获取所述站点在指定的随机竟争信道上发送 数据的随机竟争的周期时间, 并在所述随机竟争的周期时间内,在指定的随机 竟争信道上发送数据。 因此, 接入点发送一次指示帧, 可以使站点在周期时间 内发送数据, 从而可以减少发送随机指示帧的次数。
以下结合具体应用场景对上述内容做进一步的说明。
假设网络中设有一个接入点和两个站点, 两个站点分别是站点 STA1和站 点 STA2, 这两个站点均具有在随机竟争信道发送周期性业务数据的需求。 该 网络中具有 4个可用的信道,分别为信道 1、信道 2、信道 3和信道 4。如图 4所示, 数据传输的具体的流程如下:
步骤 1 : 接入点生成并发送指示帧, 指示帧包含指定的随机竟争信道的频 率信息和随机竟争的时间信息, 其中, 随机竟争的时间信息具体可以为随机竟 争的周期时间。 接入点可以在网络中所有的 4个信道上发送指示帧, 也可以只 在一个信道上发送, 例如只在信道 4上发送。 在执行步骤 1之后转入步骤 2。
步骤 2: STA 1和 STA 2接收到指示帧。 在第一个随机竟争的周期时间内, STA 1需要发送 DATA 1帧, STA 2需要发送 DATA 2帧。 STA1随机选择退避时间 为 2T, T表示退避时间的最小单位, STA2随机选择退避时间为 4T。
步骤 3: STA 1和 STA 2监听信道 4的状态。 在信道 4的空闲时间达到 DIFS时 间之后 , STA 1和 STA 2执行退避。
步骤 4: 在经过 2Τ时间之后, STA 2的退避时间减少为 2Τ, STA1发送数据 DATA1帧。
步骤 5: 接入点接收 STA 1发送的 DATA 1帧。
步骤 6: STA2监听信道 4的状态。 若此时 STA 1已经没有业务发送需求, 则无需监听信道 4。在信道 4的空闲时间达到 DIFS时间之后, STA2执行退避。
步骤 7: 经过 2T时间之后, STA2发送 DATA2帧。
步骤 8: 接入点接收 STA 2发送的 DATA 2帧。
在执行步骤 8之后, STA1和 STA2等待进入下一个随机竟争的周期时间, 重复执行步骤 3至 8的步骤。
在本发明实施例 2中, 所述站点可以在指定的信道上向接入点或另一站点 发送数据。 例如, 所述站点为站点, 该站点不仅可以用上述方法向接入点发送 数据, 还可以用上述方法向另一站点发送数据。
例如,假设网络中设有一个接入点和两个站点,两个站点分别是站点 STA 1 和站点 STA2, 这两个站点均需要在随机竟争信道发送数据, 而且能够互相监 听到对方的信号。 该网络中具有 4个可用的信道, 分别为信道 1、 信道 2、 信道 3 和信道 4。 如图 5所示, 数据传输的具体的流程如下:
步骤 1 : 接入点生成并发送指示帧, 指示帧包含指定的随机竟争信道的频 率信息和随机竟争的时间信息。
步骤 2: STA1和 STA2接收指示帧。 此时, STA1需要发送数据 DATA 1帧, STA2不需要发送数据。 STA1随机选择退避时间为 4T, T表示退避时间的最小 单位 , STA1随机选择退避时间为 2T。
步骤 3 : STA 1监听信道 4的状态。 在信道 4的空闲时间达到 DIFS时间之后, STA 1执行退避。
步骤 4: 在经过 4Τ时间之后, STA 1向 STA2发送 DATA1帧。
步骤 5: STA 2接收 STA1发送的 DATA 1帧, 并生成 ACK 1帧。
步骤 6: STA 2监听信道 4的状态。 在信道 4的空闲时间达到 DIFS时间之 后, STA 2执行退避。
步骤 7: 经过 2Τ时间之后 , STA 2向 STA1发送应答 ACK 1帧 ,
步骤 8: STA 1接收 STA 2发送的 ACK 1帧。 如图 6所示, 本发明实施例 4提供一种站点 301 , 所述站点 301包括: 接收单元 302, 用于接收接入点发送的指示帧, 所述指示帧用于指定随机 竟争信道;
监听单元 303 , 用于根据所述接收单元 302接收的所述指示帧,监听所述指 定的随机竟争信道的信道状态;
发送单元 304,用于在所述监听单元 303监听到所述指定的随机竟争信道处 于空闲状态后, 在所述指定的随机竟争信道上发送数据。
如图 7所示, 本发明实施例 4提供一种站点 401 , 所述站点 401包括: 接收单元 402, 用于接收接入点发送的指示帧, 所述指示帧包含指定的随 机竟争信道的信道;
监听单元 403 , 用于根据所述接收单元 402接收的所述指示帧,监听所述指 定的随机竟争信道的信道状态;
发送单元 404,用于在所述监听单元 403监听到所述指定的随机竟争信道处 于空闲状态后, 在所述指定的随机竟争信道上发送数据。
其中,所述发送单元 404用于在所述监听单元 403监听到所述指定的随机竟 争信道处于空闲状态后, 在所述指定的随机竟争信道上执行退避, 包括:
用于: 在所述监听单元 403监听到所述指定的随机竟争信道处于空闲状态 后,在所述指定的随机竟争信道上执行退避;在所述站点的退避时间结束之后, 在所述指定的随机竟争信道上发送数据。 可选的, 所述接收单元 402用于接收接入点发送的指示帧, 包括: 用于接收接入点发送的指示帧,所述指示帧包含指定的随机竟争信道的信 道频率信息;
所述监听单元 403用于根据所述接收单元 402接收的所述指示帧,监听所述 指定的随机竟争信道的信道状态, 包括:
用于根据所述接收单元 402接收到的所述指定的随机竟争信道的信道频率 信息, 监听所述指定的随机竟争信道的信道状态。
可选的, 所述接收单元 402用于接收接入点发送的指示帧, 包括: 用于接收接入点发送的指示帧, 所述指示帧包含随机竟争的时间信息; 所述接收单元 402还用于根据接收到的所述指示帧中包含的随机竟争的时 间信息 ,获取所述站点在所述指定的随机竟争信道上发送数据的随机竟争的时 间;
所述发送单元 404用于在所述监听单元 403监听到所述指定的随机竟争信 道处于空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括:
用于在所述监听单元 403监听到所述指定的随机竟争信道处于空闲状态 后, 而且在所述接收单元 402获取的所述随机竟争的时间内, 在所述指定的随 机竟争信道上发送数据。
所述监听单元 403用于根据所述接收单元 402接收的所述指示帧,监听所述 指定的随机竟争信道的信道状态, 包括:
用于根据所述接收单元 402接收的所述指示帧, 检测所述指定的随机竟争 信道上的信号强度;当检测到所述指定的随机竟争信道上的信号强度小于或等 于预设的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
可选的, 所述发送单元 404用于根据所述接收单元 402接收的所述指示帧, 监听所述指定的随机竟争信道的信道状态, 包括:
所述站点在频谱上检测所述指定的随机竟争信道对应的子载波上的信号 强度;
当检测到的所述指定的随机竟争信道对应的子载波上的信号强度小于或 等于预定的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
可选的, 所述接收单元 402用于接收接入点发送的指示帧, 包括: 用于接入点发送的指示帧, 所述指示帧包含随机竟争的周期时间信息; 所述接收单元 402还用于根据接收到的所述指示帧中包含的随机竟争的周 期时间信息,获取所述站点在所述指定的随机竟争信道上发送数据的随机竟争 的周期时间;
所述监听单元 403用于根据所述接收单元 402接收的所述指示帧,监听所述 指定的随机竟争信道的信道状态, 包括:
用于在监听到所述指定的随机竟争信道处于空闲状态后,而且在所述随机 竟争的周期时间内, 在所述指定的随机竟争信道上发送数据。
可选的,所述发送单元 404用于在所述监听单元 403监听到所述指定的随机 竟争信道处于空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括: 用于在所述监听单元 403监听到所述指定的随机竟争信道处于空闲状态 后, 在所述指定的随机竟争信道上向接入点或另一站点发送数据。
可选的, 所述接收单元 402用于接收接入点发送的指示帧, 包括: 所述接收单元 402用于接收接入点发送的指示帧, 所述指示帧还用于分配 用于集中调度传输的信道;
所述发送单元 404还用于根据所述接收单元 402接收到的所述指示帧,在所 述用于集中调度传输的信道上发送数据。
可选的, 所述发送单元 404用于在监听到所述指定的随机竟争信道处于空 闲状态后, 在所述指定的随机竟争信道上发送数据, 包括:
用于以正交频分多址接入 OFDMA的方式在所述指定的随机竟争信道上 发送数据, 其中, 所述随机竟争信道和所述用于集中调度传输的信道满足正交 频分 OFDM符号同步。
可选的, 所述接收单元 402进一步用于接收接入点发送的指示帧, 所述指 示帧包含所述指定站点 401组的组号信息, 所述指定站点 401组中的站点 401能 监听到所述指定站点 401组中的其它站点 401的信号, 所述指定站点 401组中的 站点 401通过随机竟争信道发送数据;
所述发送单元 404进一步用于根据所述接收单元 402接收到的所述指定站 点组的信息, 判断所述站点 401是否属于所述指定站点组, 若判断所述站点 401 属于所述指定站点组, 则在监听到所述指定的随机竟争信道处于空闲状态后, 在所述指定的随机竟争信道上执行退避。属于所述指定站点组的站点可以能够 监听到所述指定站点组中的其它站点的信号。
可选的, 所述接收单元 402进一步用于接收接入点发送的指示帧, 所述指 示帧包含所述指定站点组的组号信息;
所述发送单元 404进一步用于根据所述指定站点组的组号信息, 获取所述 指定站点组的组号; 当所述站点 401所属的站点组的组号与获取的所述指定站 点组的组号相同时, 则判断所述站点 401属于所述指定站点组。
如图 8所示, 本发明实施例 5提供一种站点 501 ,在所述站点 501所在的网络 中存在随机竟争信道和用于集中调度传输的信道, 其中, 所述网络为基于非授 权频段的网络, 或为基于授权频段的网络。 所述站点 501包括:
接收器 502, 用于接收接入点发送的指示帧, 所述指示帧用于指定随机竟 争信道;
处理器 503 , 用于根据所述接收器 502接收的指示帧,监听所述指定的随机 竟争信道的信道状态;
发射器 504,用于在处理器 503监听到所述指定的随机竟争信道处于空闲状 态后, 在所述指定的随机竟争信道上发送数据。
可选的,发射器 504, 用于在处理器 503监听到所述指定的随机竟争信道处 于空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括:
用于在处理器 503监听到所述指定的随机竟争信道处于空闲状态后, 在所 述指定的随机竟争信道上执行退避; 在所述站点的退避时间结束之后,在所述 指定的随机竟争信道上发送数据。
可选的, 所述接收器 502进一步用于接收接入点发送的指示帧, 所述指示 帧包含指定的随机竟争信道的信道频率信息;
所述处理器 503进一步用于根据所述接收器 502接收的指示帧中包含的所 述指定的随机竟争信道的信道频率信息,监听所述指定的随机竟争信道的信道 状态。
可选的, 所述接收器 502进一步用于接收接入点发送的指示帧, 所述指示 帧包含随机竟争的时间信息;
所述处理器 503进一步用于根据所述接收器 502接收的指示帧中包含的随 机竟争的时间信息, 获取所述站点 501在所述指定的随机竟争信道上发送数据 的随机竟争的时间;
所述发射器 504进一步用于在处理器 503监听到所述指定的随机竟争信道 处于空闲状态后, 而且在所述随机竟争的时间内,在所述指定的随机竟争信道 上发送数据。
可选的, 所述处理器 503进一步用于根据所述指示帧, 检测所述指定的随 机竟争信道上的信号强度;当检测到的所述指定的随机竟争信道上的信号强度 小于或等于预设的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
可选的, 所述处理器 503进一步用于根据所述指示帧, 在频谱上检测所述 指定的随机竟争信道对应的子载波上的信号强度;当检测到的所述指定的随机 竟争信道对应的子载波上的信号强度小于或等于预定的阈值时,则判断所述指 定的随机竟争信道处于空闲状态。
可选的, 所述接收器 502进一步用于接收接入点发送的指示帧, 所述指示 帧包含随机竟争的周期时间信息;
所述处理器 503进一步用于根据所述指示帧中包含的随机竟争的周期时间 信息 ,获取所述站点在所述指定的随机竟争信道上发送数据的随机竟争的周期 时间;
所述发射器 504用于在所述处理器 503监听到所述指定的随机竟争信道处 于空闲状态后, 而且在所述随机竟争的周期时间内,在所述指定的随机竟争信 道上发送数据。
可选的,所述发射器 504用于在所述处理器 503监听到所述指定的随机竟争 信道处于空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括:
所述发射器 504用于在所述处理器 503监听到所述指定的随机竟争信道处 于空闲状态后, 在所述指定的随机竟争信道上向接入点或另一站点发送数据。
可选的, 所述接收器 502进一步用于接收接入点发送的指示帧, 所述指示 帧还用于分配用于集中调度传输的信道;
所述发射器 504用于根据所述指示帧, 在所述用于集中调度传输的信道上 发送数据。
可选的,所述发射器 504用于在所述处理器 503监听到所述指定的随机竟争 信道处于空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括: 所述发射器 504用于以正交频分多址接入 OFDMA的方式在所述指定的随 机竟争信道上发送数据, 其中, 所述随机竟争信道和所述用于集中调度传输的 信道满足正交频分 OFDM符号同步。
可选的, 所述接收器 502进一步用于接收接入点发送的指示帧, 所述指示 帧包含指定站点组的信息, 所述指定站点组中的站点 501能监听到所述指定站 点组中的其它站点 501的信号,所述指定站点组中的站点 501通过随机竟争信道 发送数据;
所述处理器 503进一步用于根据所述接收器 502接收的指示帧中包含的所 述指定站点组的信息, 判断所述站点 501是否属于所述指定站点组; 若判断所 述站点 501属于所述指定站点组, 则在当所述指定的随机竟争信道处于空闲状 态时, 所述站点 501在所述指定的随机竟争信道上执行退避。
可选的, 所述接收器 502进一步用于接收接入点发送的指示帧, 所述指示 帧包含所述指定站点组的组号信息;
所述处理器 503进一步用于根据所述接收器 502接收的指示帧中包含的所 述指定站点组的组号信息, 获取所述指定站点组的组号; 当所述站点 501所属 的站点组的组号与所述指定站点组的组号相同时, 则判断所述站点 501属于所 述指定站点组。
可选的, 所述接收器 502进一步用于接收接入点发送的指示帧, 所述指示 帧包含随机竟争的周期时间信息;
所述处理器 503进一步用于根据所述接收器 502接收的所述指示帧中包含 的随机竟争的周期时间信息, 获取所述站点 501在指定的随机竟争信道上发送 数据的随机竟争的周期时间;
所述发射器 504进一步用于在处理器 503获得的所述随机竟争的周期时间 内的随机竟争的时间内, 在所述指定的随机竟争信道上发送数据。
可选的, 所述发射器 504用于在所述指定的随机竟争信道上向接入点或另 一站点 501发送数据。
可选的, 所述接收器 502用于接收接入点发送的指示帧, 所述指示帧还用 于分配用于集中调度传输的信道; 所述发射器 504还用于根据所述接收器 502接收到的所述指示帧,在所述用 于集中调度传输的信道上发送数据。
具体实现中, 本发明还提供一种计算机存储介质, 其中, 该计算机存储介 质可存储有程序,给程序执行时可包括本发明提供的基于虚拟组网的交换机配 置方法的各实施例中的部分或全部步骤。 所述的存储介质可为磁碟、 光盘、 只 读存储记忆体( Read-Only Memory, ROM )或随机存储记忆体( Random Access Memory, RAM )等。
以上对本发明实施例所提供的一种数据传输方法及站点进行了详细介绍, 说明只是用于帮助理解本发明的方法及其核心思想; 同时,对于本领域的一般 技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种数据传输方法, 其特征在于, 包括:
站点接收接入点发送的指示帧, 所述指示帧用于分配指定的随机竟争信 道;
根据所述指示帧, 监听所述指定的随机竟争信道的信道状态;
在监听到所述指定的随机竟争信道处于空闲状态后,所述站点在所述指定 的随机竟争信道上发送数据。
2、 根据权利要求 1所述的数据传输方法, 其特征在于, 所述在监听到所述 指定的随机竟争信道处于空闲状态后 ,所述站点在所述指定的随机竟争信道上 发送数据, 包括:
在监听到所述指定的随机竟争信道处于空闲状态后,所述站点在所述指定 的随机竟争信道上执行退避;
在所述站点的退避时间结束之后,所述站点在所述指定的随机竟争信道上 发送数据。
3、 根据权利要求 1或 2所述的数据传输方法, 其特征在于, 所述站点接收 接入点发送的指示帧, 包括:
接收接入点发送的指示帧 ,所述指示帧包含指定的随机竟争信道的信道频 率信息;
所述根据所述指示帧, 监听所述指定的随机竟争信道的信道状态, 包括: 根据所述指定的随机竟争信道的信道频率信息,监听所述指定的随机竟争 信道的信道状态。
4、 根据权利要求 1、 2或 3所述的数据传输方法, 其特征在于, 所述接收接 入点发送的指示帧, 包括:
接收接入点发送的指示帧, 所述指示帧包含随机竟争的时间信息; 所述方法还包括:
根据所述指示帧中包含的随机竟争的时间信息,获取所述站点在所述指定 的随机竟争信道上发送数据的随机竟争的时间;
所述在监听到所述指定的随机竟争信道处于空闲状态后,所述站点在所述 指定的随机竟争信道上发送数据, 包括: 在监听到所述指定的随机竟争信道处于空闲状态后,而且在所述随机竟争 的时间内, 所述站点在所述指定的随机竟争信道上发送数据。
5、 根据权利要求 1-4任意一项所述的数据传输方法, 其特征在于, 所述根 据所述指示帧, 监听所述指定的随机竟争信道的信道状态, 包括:
所述站点根据所述指示帧, 检测所述指定的随机竟争信道上的信号强度; 当检测到的所述指定的随机竟争信道上的信号强度小于或等于预设的阈 值时, 则判断所述指定的随机竟争信道处于空闲状态。
6、 根据权利要求 1-4任意一项所述的数据传输方法, 其特征在于, 所述根 据所述指示帧, 监听所述指定的随机竟争信道的信道状态, 包括:
所述站点在频谱上检测所述指定的随机竟争信道对应的子载波上的信号 强度;
当检测到的所述指定的随机竟争信道对应的子载波上的信号强度小于或 等于预定的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
7、 根据权利要求 1-3任意一项所述的数据传输方法, 其特征在于, 所述接 收接入点发送的指示帧, 包括:
所述接收接入点发送的指示帧, 所述指示帧包含随机竟争的周期时间信 息;
所述方法还包括:
根据所述指示帧中包含的随机竟争的周期时间信息,获取所述站点在所述 指定的随机竟争信道上发送数据的随机竟争的周期时间;
所述在监听到所述指定的随机竟争信道处于空闲状态后,所述站点在所述 指定的随机竟争信道上发送数据, 包括:
在监听到所述指定的随机竟争信道处于空闲状态后,而且在所述随机竟争 的周期时间内, 在所述指定的随机竟争信道上发送数据。
8、 根据权利要求 1至 7任意一项所述的数据传输方法, 其特征在于, 所述 站点在监听到所述指定的随机竟争信道处于空闲状态后,在所述指定的随机竟 争信道上发送数据, 包括:
所述站点在监听到所述指定的随机竟争信道处于空闲状态后,在所述指定 的随机竟争信道上向接入点或另一站点发送数据。
9、 根据权利要求 1至 8任意一项所述的数据传输方法, 其特征在于, 所述 指示帧还用于分配用于集中调度传输的信道;
所述方法还包括: 根据所述指示帧,在所述用于集中调度传输的信道上发 送数据。
10、 根据权利要求 9所述的数据传输方法, 其特征在于, 所述在监听到所 述指定的随机竟争信道处于空闲状态后 ,所述站点在所述指定的随机竟争信道 上发送数据, 包括:
所述站点以正交频分多址接入 OFDMA的方式在所述指定的随机竟争信 道上发送数据, 其中, 所述随机竟争信道和所述用于集中调度传输的信道满足 正交频分 OFDM符号同步。
11、 一种站点, 其特征在于, 包括:
接收单元, 用于接收接入点发送的指示帧, 所述指示帧用于指定随机竟争 信道;
监听单元, 用于根据所述接收单元接收的所述指示帧,监听所述指定的随 机竟争信道的信道状态;
发送单元,用于在所述监听单元监听到所述指定的随机竟争信道处于空闲 状态后, 在所述指定的随机竟争信道上发送数据。
12、 根据权利要求 11所述的站点, 其特征在于, 所述发送单元用于在所述 监听单元监听到所述指定的随机竟争信道处于空闲状态后,在所述指定的随机 竟争信道上执行退避, 包括:
用于: 在所述监听单元监听到所述指定的随机竟争信道处于空闲状态后, 在所述指定的随机竟争信道上执行退避; 在所述站点的退避时间结束之后, 在 所述指定的随机竟争信道上发送数据。
13、 根据权利要求 11或 12所述的站点, 其特征在于, 所述接收单元用于接 收接入点发送的指示帧, 包括:
用于接收接入点发送的指示帧,所述指示帧包含指定的随机竟争信道的信 道频率信息;
所述监听单元用于根据所述接收单元接收的所述指示帧,监听所述指定的 随机竟争信道的信道状态, 包括: 用于根据所述接收单元接收到的所述指定的随机竟争信道的信道频率信 息, 监听所述指定的随机竟争信道的信道状态。
14、 根据权利要求 11-13任意一项所述的站点, 其特征在于, 所述接收单 元用于接收接入点发送的指示帧, 包括:
用于接收接入点发送的指示帧, 所述指示帧包含随机竟争的时间信息; 所述接收单元还用于根据接收到的所述指示帧中包含的随机竟争的时间 信息, 获取所述站点在所述指定的随机竟争信道上发送数据的随机竟争的时 间;
所述发送单元用于在所述监听单元监听到所述指定的随机竟争信道处于 空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括:
用于在所述监听单元监听到所述指定的随机竟争信道处于空闲状态后,而 且在所述接收单元获取的所述随机竟争的时间内,在所述指定的随机竟争信道 上发送数据。
15、 根据权利要求 10-14任意一项所述的站点, 其特征在于, 所述监听单 元用于根据所述接收单元接收的所述指示帧 ,监听所述指定的随机竟争信道的 信道状态, 包括:
用于根据所述接收单元接收的所述指示帧,检测所述指定的随机竟争信道 上的信号强度;当检测到所述指定的随机竟争信道上的信号强度小于或等于预 设的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
16、 根据权利要求 11-14任意一项所述的站点, 其特征在于, 所述发送单 元用于根据所述接收单元接收的所述指示帧,监听所述指定的随机竟争信道的 信道状态, 包括:
所述站点在频谱上检测所述指定的随机竟争信道对应的子载波上的信号 强度;
当检测到的所述指定的随机竟争信道对应的子载波上的信号强度小于或 等于预定的阈值时, 则判断所述指定的随机竟争信道处于空闲状态。
17、 根据权利要求 11-14任意一项所述的站点, 其特征在于, 所述接收单 元用于接收接入点发送的指示帧, 包括:
用于接入点发送的指示帧, 所述指示帧包含随机竟争的周期时间信息; 所述接收单元还用于根据接收到的所述指示帧中包含的随机竟争的周期 时间信息 ,获取所述站点在所述指定的随机竟争信道上发送数据的随机竟争的 周期时间;
所述监听单元用于根据所述接收单元接收的所述指示帧,监听所述指定的 随机竟争信道的信道状态, 包括:
用于在监听到所述指定的随机竟争信道处于空闲状态后,而且在所述随机 竟争的周期时间内, 在所述指定的随机竟争信道上发送数据。
18、 根据权利要求 11-17任意一项所述的站点, 其特征在于,
所述发送单元用于在所述监听单元监听到所述指定的随机竟争信道处于 空闲状态后, 在所述指定的随机竟争信道上发送数据, 包括:
用于在所述监听单元监听到所述指定的随机竟争信道处于空闲状态后,在 所述指定的随机竟争信道上向接入点或另一站点发送数据。
19、 根据权利要求 11-18任意一项所述的站点, 其特征在于, 所述接收单 元用于接收接入点发送的指示帧, 包括:
所述接收单元用于接收接入点发送的指示帧,所述指示帧还用于分配用于 集中调度传输的信道;
所述发送单元还用于根据所述接收单元接收到的所述指示帧,在所述用于 集中调度传输的信道上发送数据。
20、 根据权利要求 19所述的站点, 其特征在于, 所述发送单元用于在监听 到所述指定的随机竟争信道处于空闲状态后,在所述指定的随机竟争信道上发 送数据, 包括:
用于以正交频分多址接入 OFDMA的方式在所述指定的随机竟争信道上 发送数据, 其中, 所述随机竟争信道和所述用于集中调度传输的信道满足正交 频分 OFDM符号同步。
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