WO2015096029A1 - 数据传输方法和设备 - Google Patents

数据传输方法和设备 Download PDF

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Publication number
WO2015096029A1
WO2015096029A1 PCT/CN2013/090323 CN2013090323W WO2015096029A1 WO 2015096029 A1 WO2015096029 A1 WO 2015096029A1 CN 2013090323 W CN2013090323 W CN 2013090323W WO 2015096029 A1 WO2015096029 A1 WO 2015096029A1
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WO
WIPO (PCT)
Prior art keywords
access point
user equipment
point device
downlink
time period
Prior art date
Application number
PCT/CN2013/090323
Other languages
English (en)
French (fr)
Inventor
马驰翔
伍天宇
张佳胤
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 CN201380081878.6A priority Critical patent/CN105850220B/zh
Priority to EP13900048.3A priority patent/EP3079437B1/en
Priority to PCT/CN2013/090323 priority patent/WO2015096029A1/zh
Publication of WO2015096029A1 publication Critical patent/WO2015096029A1/zh
Priority to US15/191,307 priority patent/US10172159B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/52Allocation or scheduling criteria for wireless resources based on load
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to communication technologies, and in particular, to a data transmission method and device. Background technique
  • a current upgrade technology is to increase the spectrum resources to transmit more information.
  • spectrums that are strictly controlled by the spectrum management organization, the spectrum obtained by purchasing licenses is difficult to continuously distribute, and the peak rate of data transmission needs to be improved by using the technology of spectrum resource fragmentation.
  • free spectrum wireless devices can be used as long as they meet the power limit.
  • data transmission for wireless communication usually requires a certain signal-to-noise ratio, and free spectrum may be used by some devices at any time. Therefore, communication using free spectrum is also required. Increase the peak rate of data transmission by using techniques for spectrum resource fragmentation.
  • the scheduling transmission method can well solve the problem of QoS, and at the same time needs to be compatible with the traditional wireless LAN system, so it is necessary to provide a scheme for scheduling transmission in the competition transmission system.
  • the hidden node problem is that when an access point (AP) 1 transmits data to a user equipment (Station, referred to as STA), and AP2 does not know, the data is also transmitted to the STA. As a result, the STA cannot receive the data of the API correctly.
  • the exposed node problem refers to a network allocation vector set, for example, when STA1 is transmitting data to the API, and STA2 is listening to STA1 sending data. (Network Allocation Vector, abbreviated as: NAV), which causes STA2 to fail to transmit data to AP2.
  • NAV Network Allocation Vector
  • STA2 sends data at this time does not affect API reception, which reduces system resource usage.
  • the user equipment listens to whether the channel allocated by the associated access point device of the user equipment is occupied before obtaining the downlink time period of the scheduling period;
  • the user equipment sends channel clearing signaling to the access point device, where the channel clearing signaling includes a first identifier for identifying the user equipment and used to identify the access a second identifier of the point device, so that the access point device obtains a downlink time period of a scheduling period for data transmission after determining that the second identifier is an identifier corresponding to the access point device;
  • the user equipment receives data transmitted by the access point device during a downlink time period of the scheduling period.
  • the method before the listening to the channel allocated by the associated access point device of the user equipment is occupied, the method further includes: the user equipment receiving the access The downlink scheduling information sent by the point device, and the indication information for identifying the sequence of the user equipment; and determining, according to the downlink scheduling information, that the user equipment is scheduled to be downlinked by the access point device; And including a sequence of the user equipment acquired by the user equipment according to the indication information.
  • the indication information of the sequence of the user equipment is that the user equipment is associated with the access point device Receiving, the sequence of the user equipment is a sequence corresponding to the user equipment allocated by the access point device.
  • the indication information of the sequence of the user equipment is that the user equipment is associated with the access point device And receiving, by the access point device, a sequence indication update message, where the sequence indication update message includes indication information of a sequence of the user equipment.
  • the channel clearing signaling includes allowing a sending frame and a sequence frame, where the allowed sending frame includes the second identifier and network allocation Vector, the first identifier is included in the sequence frame.
  • a data transmission method includes:
  • the access point device receives the channel clearing signaling sent by the user equipment, where the channel clearing signaling includes a first identifier for identifying the user equipment and a second identifier for indicating the access point device; So that the user equipment is sent when the channel allocated by the associated access point device of the user equipment is not occupied;
  • the method before the access point device receives the channel clearing signaling sent by the user equipment, the method further includes: sending, by the access point device, the user equipment The downlink scheduling information, and the indication information for identifying the sequence of the user equipment, so that the user equipment carries, according to the indication information, the user equipment sequence corresponding to the indication information in the channel clearing signaling as the A logo.
  • the access point device contends to send the downlink scheduling information in a downlink period; or, the access The point device sends the downlink scheduling information after a downlink time period of the scheduling time period in the downlink period;
  • the access point device sends the downlink scheduling information to the user equipment after the channel clearing signaling is sent in the downlink period.
  • a data transmission method includes:
  • the access point device listens to whether the channel allocated by the access point device for the associated user equipment is occupied before obtaining the uplink time period of the scheduling time period;
  • the access point device sends channel clearing signaling to the user equipment, where the channel clearing signaling includes a third identifier for identifying the access point device and is used for identifying The fourth identifier of the network where the user equipment is located, so that the user equipment determines that the network corresponding to the fourth identifier is the network where the user equipment is located, and the access point device corresponding to the third identifier is the user equipment.
  • Get the tone for data transmission when associating the access point device The uplink time period of the time period;
  • the access point device receives data transmitted by the user equipment during an uplink time period of the scheduling period.
  • the method before or after the access point device sends the channel clearing signaling to the user equipment, the method further includes: the access point device to the user equipment Sending uplink scheduling information, where the uplink scheduling information is used to schedule uplink transmission of the user equipment; the access point device sends channel clearing signaling to the user equipment, where: the access point device sends a channel clearing signal to the user equipment.
  • the channel clearing signaling carries an access point sequence for identifying the access point device as the third identifier.
  • the access point device contends to send the uplink scheduling information in a downlink period; or, the access The point device sends the uplink scheduling information after a downlink time period of the scheduling time period in the downlink period;
  • the access point device sends the uplink scheduling information to the user equipment after sending the channel clearing signaling in the downlink period.
  • the channel clearing signaling includes allowing a sending frame and a sequence frame, where the allowed sending frame includes the third identifier and a network allocation vector, where the sequence frame is The fourth identifier is included in the middle.
  • a fourth aspect provides a data transmission method, where the method includes:
  • the user equipment receives the channel clearing signaling sent by the access point device, where the channel clearing signaling includes a third identifier for identifying the access point device and a fourth identifier for identifying the network where the user equipment is located;
  • the channel clearing signaling is sent by the access point device when the channel allocated by the access point device for the associated user equipment is not occupied;
  • the scheduling time is obtained.
  • the uplink time period of the segment and the uplink time period of the scheduling time period are used to transmit data to the access point device corresponding to the third identifier.
  • the third identifier is indication information of a sequence of the access point device
  • the method further includes: The user equipment receives the indication information of the sequence of the access point device sent by the access point device in the process of being associated with the access point device.
  • the third identifier is indication information of a sequence of the access point device
  • the method further includes: after the user equipment is associated with the access point device, receiving a sequence indication update message sent by the access point device,
  • the sequence indication update message includes indication information of a sequence of the access point device.
  • the method before or after the user equipment receives the channel clearing signaling sent by the access point device, the method further includes:
  • the user equipment receives the uplink scheduling information sent by the access point device, and determines, according to the uplink scheduling information, that the user equipment is scheduled to be uplinked by the access point device.
  • the user equipment sends the uplink scheduling information to an uplink/downlink switching point in an uplink period to another The user equipment broadcasts.
  • a fifth aspect provides a user equipment, where the device includes:
  • a first channel listening unit configured to listen to whether a channel allocated by an associated access point device of the user equipment is occupied before obtaining the downlink time period of the scheduling time period;
  • a first signaling sending unit configured to send channel clearing signaling to the access point device when the channel is not occupied, where the channel clearing signaling includes a first identifier used to identify the user equipment, and Identifying a second identifier of the access point device, so that the access point device obtains a downlink time of a scheduling period for data transmission after determining that the second identifier is an identifier corresponding to the access point device Paragraph
  • a first data receiving unit configured to receive data transmitted by the access point device during a downlink time period of the scheduling period.
  • the information acquiring unit is configured to receive downlink scheduling information sent by the access point device before the first channel listening unit listens to the channel. And determining, by the downlink information, the user equipment is scheduled to be downlinked by the access point device, and the first signaling sending unit is configured to send the When the channel clears the signaling, it is specifically used to set the access point.
  • the sending channel clears the signaling, and carries the sequence of the user equipment acquired according to the indication information as the first identifier according to the indication information.
  • the information acquiring unit when receiving the indication information, is specifically used to Receiving in the process of association of the access point device, the sequence of the user equipment is a sequence corresponding to the user equipment allocated by the access point device; or, after being associated with the access point device, receiving the The sequence information sent by the access point device indicates an update message, and the sequence indication update message includes indication information of a sequence of the user equipment.
  • a sixth aspect provides an access point device, where the device includes:
  • a first signaling receiving unit configured to receive channel clearing signaling sent by the user equipment, where the channel clearing signaling includes a first identifier used to identify the user equipment, and a second identifier used to indicate an access point device
  • the channel clearing signaling is sent by the user equipment when the channel allocated by the associated access point device of the user equipment is not occupied;
  • a first data sending unit configured to: when determining that the second identifier is an identifier corresponding to the access point device, transmit data to the user equipment corresponding to the first identifier by using a downlink time period of the scheduling period.
  • the method further includes: a scheduling control unit, configured to: before the first signaling receiving unit receives the channel clearing signaling sent by the user equipment, The device sends the downlink scheduling information, and the indication information for identifying the sequence of the user equipment, so that the user equipment carries the sequence of the user equipment corresponding to the indication information in the channel clearing signaling according to the indication information.
  • a scheduling control unit configured to: before the first signaling receiving unit receives the channel clearing signaling sent by the user equipment, The device sends the downlink scheduling information, and the indication information for identifying the sequence of the user equipment, so that the user equipment carries the sequence of the user equipment corresponding to the indication information in the channel clearing signaling according to the indication information.
  • the scheduling control unit when sending downlink scheduling information to the user equipment, is specifically used to And transmitting the downlink scheduling information in a downlink period; or, sending the downlink scheduling information after a downlink time period of the scheduling period in the downlink period; or: using the downlink scheduling information in the downlink period
  • the user equipment sends after transmitting channel clearing signaling.
  • a seventh aspect provides an access point device, where the device includes:
  • a second channel listening unit configured to listen to whether the channel allocated by the access point device for the associated user equipment is occupied before obtaining the uplink time period of the scheduling time period;
  • a second signaling sending unit configured to send channel clearing signaling to the user equipment when the channel is not occupied, where the channel clearing signaling includes a third identifier used to identify the access point device and a fourth identifier that is used to identify the network where the user equipment is located, so that the user equipment determines that the network corresponding to the fourth identifier is the network where the user equipment is located, and the access point device corresponding to the third identifier is Obtaining an uplink time period of a scheduling time period for data transmission when the user equipment associates the access point device;
  • a second data receiving unit configured to receive data transmitted by the user equipment in an uplink time period of the scheduling time period.
  • the method further includes: an information sending unit, configured to send an uplink scheduling to the user equipment before or after the second signaling sending unit sends the channel clearing signaling
  • the uplink scheduling information is used to schedule the uplink transmission of the user equipment
  • the second signaling sending unit is specifically configured to carry in the channel clearing signaling when sending channel clearing signaling to the user equipment.
  • the sequence of access points identifying the access point device is used as the third identifier.
  • the information sending unit when the user equipment sends the uplink scheduling information, is specifically used for the downlink
  • the periodic scheduling information is sent by the uplink scheduling information; or the uplink scheduling information is sent after a downlink time period of the scheduling time period in the downlink period; or the uplink scheduling information is sent to the The user equipment sends the channel clearing signaling and then sends it.
  • the eighth aspect provides a user equipment, where the device includes:
  • a second signaling receiving unit configured to receive channel clearing signaling sent by the access point device, where the channel clearing signaling includes a third identifier used to identify the access point device and used to identify the user equipment The fourth identifier of the network; the channel clearing signaling is sent by the access point device when the channel allocated by the access point device for the associated user equipment is not occupied;
  • a second data sending unit configured to: when it is determined that the network corresponding to the fourth identifier is the network where the user equipment is located, and the access point device corresponding to the third identifier is an associated access point device of the user equipment Obtaining an uplink time period of the scheduling period and transmitting data to the access point device corresponding to the third identifier by using an uplink time period of the scheduling period.
  • the second signaling receiving unit And receiving, before or after the user equipment receives the channel clearing signaling sent by the access point device, receiving uplink scheduling information sent by the access point device, and determining the user equipment according to the uplink scheduling information. It is scheduled to be uplinked by the access point device.
  • the second signaling receiving unit when receiving the uplink scheduling information sent by the access point device Specifically, in the process of being associated with the access point device, receiving indication information of a sequence of the access point device sent by the access point device; or, after being associated with the access point device, Receiving a sequence indication update message sent by the access point device, where the sequence indication update message includes indication information of a sequence of the access point device.
  • the second data sending unit is further configured to receive the second signaling receiving unit
  • the uplink scheduling information is broadcast to other user equipments after the uplink and downlink switching points in the uplink period.
  • FIG. 1 is an optional scenario applicable to an embodiment of a data transmission method according to the present invention.
  • FIG. 2 is a schematic flow chart of an embodiment of a data transmission method according to the present invention.
  • FIG. 3 is a schematic diagram of a CCS signaling structure according to an embodiment of a data transmission method according to the present invention
  • FIG. 4 is a second schematic diagram of a CCS signaling structure according to an embodiment of a data transmission method according to the present invention
  • FIG. 6 is a schematic flowchart of still another embodiment of a data transmission method according to the present invention.
  • FIG. 7 is a schematic flowchart diagram of still another embodiment of a data transmission method according to the present invention
  • FIG. 8 is a schematic diagram of a transmission structure according to still another embodiment of a data transmission method according to the present invention
  • FIG. 9 is a schematic diagram of signaling according to still another embodiment of a data transmission method according to the present invention
  • FIG. 10 is a schematic diagram of signaling according to still another embodiment of a data transmission method according to the present invention.
  • FIG. 12 is a schematic diagram of a transmission structure of a data transmission method according to another embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a transmission structure according to another embodiment of the data transmission method of the present invention.
  • FIG. 14 is a schematic structural diagram of another embodiment of a user equipment according to the present invention.
  • FIG. 15 is a schematic structural diagram of an embodiment of an access point device according to the present invention.
  • FIG. 16 is a schematic structural diagram of another embodiment of an access point device according to the present invention.
  • FIG. 17 is a schematic structural diagram of still another embodiment of an access point device according to the present invention.
  • FIG. 18 is a schematic structural diagram of still another embodiment of an access point device according to the present invention.
  • FIG. 19 is a schematic structural diagram of still another embodiment of a user equipment according to the present invention. detailed description
  • the frequency band resource of the communication system is divided into several component carriers.
  • Component Carrier CC for short
  • the bandwidth of all component carriers can be changed.
  • the carrier aggregation is to aggregate two or more component carriers.
  • a mixed mode of contention and scheduling may be adopted, and the transmission time of each component carrier is divided into a scheduling time segment and a competition time segment, and the competition is performed.
  • the time period is used for competing to obtain transmission data, and the transmission data obtained by the above competition is scheduled in the scheduling time period.
  • the data transmission on each component carrier is also contention based, for example by CSMA/CA in the prior art.
  • the CSMA/CA mechanism performs the competition, that is, the opportunity to send data through competition. Scheduling time period
  • Scheduling Phase may be a time period for performing uplink or downlink transmission through contention on a component carrier
  • CP contention phase
  • CP contention phase
  • Segments, of course, scheduling periods and contention periods may also be referred to as other names, and are also within the scope of the present invention.
  • the embodiment of the present invention provides a data transmission method, which is used to solve the problem of the hidden node and the exposed node that exist at present, so that the data can be transmitted without data interference, and the data transmission is normally performed.
  • the method can be used for data transmission in a wireless local area network.
  • the scheduling transmission method may include: a scheduling transmission mode and a contention transmission mode, where the specific transmission method of the contention transmission mode may be implemented based on an existing CSMA/CA competition mechanism, so as to be compatible with the prior art.
  • FIG. 1 is an optional scenario applicable to the data transmission method embodiment of the present invention.
  • the data transmission in the embodiment of the present invention may be used to transmit data between the user equipment STA and the access point device AP;
  • the transmission data may be that the AP performs downlink data transmission to the STA.
  • the AP is used as the transmitting end device of the current data transmission
  • the STA is used as the receiving end device.
  • the STA may perform uplink data transmission to the AP.
  • the STA acts as the transmitting device of the current data transmission
  • the AP acts as the receiving device.
  • the downlink data is to be sent in the downlink time period of the obtained scheduling time period
  • the uplink data is to be sent in the uplink time period of the obtained scheduling time period. That is, the method of the embodiment of the present invention can be used for the transmitting end device to transmit data to the receiving end device by using a scheduling time period.
  • each component carrier is divided into uplink time of the component carrier and downlink time of the component carrier by the uplink and downlink switching points in time, and different component carriers.
  • the uplink and downlink switching points are consistent in time, that is, the uplink and downlink switching points of the respective component carriers are aligned in time.
  • the network side device may determine an uplink and downlink switching point, and periodically broadcast the uplink and downlink switching point to each user equipment in an uplink time and/or a downlink time of each component carrier.
  • the uplink time and the downlink time of the component carrier are the same, that is, the length of time between adjacent two uplink and downlink switching points is the same.
  • the specific value of the length of time can be set autonomously, and the value update and change can be performed in practical applications, which is not limited herein.
  • the length of the uplink time and the downlink time of the member carrier may also be different, and the embodiment of the present invention is not limited.
  • the network side device (for example, an AP) can schedule the user equipment to use the idle member carriers to send uplink service data to the network side device during the uplink time of the component carrier.
  • the scheduling network side device sends the downlink service data to each user equipment by using each idle component carrier.
  • the scheduling period may be obtained by the network side device in the downlink time of the component carrier, or may be obtained by the network side device in the uplink time of the component carrier. All the time periods or part of the time period of the scheduling time period are released after the scheduling time period is successfully contiguous; the scheduling time period is also divided into the uplink time period of the scheduling time segment and the downlink time of the scheduling time segment by the uplink and downlink switching points.
  • the transmission data in the uplink time segment of the scheduling time segment corresponds to the uplink transmission resource
  • the transmission data in the downlink time segment of the scheduling time segment corresponds to the downlink transmission resource
  • the uplink and downlink time segment in the scheduling time segment is the uplink and downlink time of the component carrier. Part or all.
  • the downlink transmission resource in the downlink time period of the scheduling time period is used for the downlink transmission of the network side device and the user equipment
  • the uplink transmission resource in the uplink time period of the scheduling time period is used for uplink transmission by the user equipment and the network side equipment.
  • the network side device determines the start and end time of the scheduling time period corresponding to the at least one component carrier according to the information of the transmission data that is successfully obtained by competing for the at least one component carrier.
  • the method may be used by an access point device to transmit data to a user equipment by using a downlink time period of a scheduling period, where the method may be performed by a user equipment for data transmission, such as As shown in FIG. 2, the method may include:
  • the user equipment Before the downlink time period of the scheduling time period is obtained, the user equipment is configured to listen to whether the channel allocated by the associated access point device of the user equipment is occupied.
  • the user equipment STA is a receiving end device of data when transmitting downlink.
  • Obtaining the scheduling time period means that the transmission time is divided into an uplink transmission time period and a downlink transmission time period, and the uplink time period and the downlink transmission time period are obtained, and the uplink of the scheduling time period is obtained between the AP and the STA in the uplink transmission time period.
  • the STA transmits the uplink data to the AP.
  • the downlink time period of the scheduling time period is obtained between the AP and the STA, and the AP transmits the downlink data to the STA.
  • the scheduling time period is obtained. Previously, it can generally refer to the vicinity of the switching time point of the uplink transmission time period and the downlink transmission time period.
  • the user equipment before the user equipment obtains the scheduling time period, it is required to listen to whether the channel allocated by the associated access point device of the user equipment is occupied, that is, whether the channel that the user equipment wants to listen to the user equipment is available. For example, when it is required to obtain the downlink time period of the scheduling time period in which the AP transmits to the STA, the STA will listen to whether the channel of its receiving end is available.
  • the associated AP of the user equipment that is, the associated AP of the STA, refers to that the STA establishes a connection with the associated AP, and can access the network through the associated AP. 202. If the channel is not occupied, the user equipment sends channel clearing signaling to the access point device, where the channel clearing signaling includes a first identifier used to identify the user equipment, and is used to identify the a second identifier of the access point device;
  • the user equipment If the user equipment is listening to the channel of the user equipment end, that is, the channel is not occupied, the user equipment will transmit to the transmitting end device (the transmitting end device and the receiving end device in the embodiment of the present invention are slave data transmission). From the perspective of the transmitting device, that is, the transmitting device, the receiving device that receives the data.
  • the transmitting data may be that the AP performs downlink data transmission to the STA, and in the downlink data transmission, the AP serves as the current time.
  • the transmitting end device of the data transmission the STA is used as the receiving end device; or, the STA may perform uplink data transmission to the AP, and in the uplink data transmission, the STA is used as the transmitting end device of the current data transmission, and the AP is sent as the receiving end device) a Channel Clearing Signaling (CCS), where the CCS includes the foregoing first identifier and the second identifier, so that the access point device determines that the second identifier is corresponding to the access point device.
  • CCS Channel Clearing Signaling
  • the function of the CCS is as follows. For example, if an AP receives the CCS sent by the UE, the AP can view the second identifier.
  • the AP can occupy the channel. For the AP, it is not occupied by other APs, and the AP S can use the channel; and if other APs receive the CCS and view the identity of the other APs by the second identifier, it indicates that the channel is For other APs, it is already occupied channel, and the other APs can no longer use the channel. Therefore, from the perspective of the UE, it is assumed that the UE receives the scheduling information sent by the first AP, and the scheduling information is used to notify the UE that the first AP wants to send downlink data to the UE, and then the UE listens to the channel when listening to the channel.
  • the function of the first identifier is: when the AP determines that the data transmission is to be started according to the second identifier, the UE may be found according to the first identifier, and the data is transmitted to the UE corresponding to the first identifier.
  • FIG. 3 is a schematic diagram of a CCS signaling structure according to an embodiment of a data transmission method according to the present invention.
  • the CCS may include a Clear to Send (CTS) and a sequence frame.
  • the CTS frame includes a Physical Layer Convergence Procedure (PLCP) Header, a Frame Control, and a Duration (National NAV, which is mainly used to limit the occupation time of the channel. ), Receive address (RA) and Frame Check Sequence (FCS); and sequence frames include PLCP Header and sequence sequence.
  • PLCP Physical Layer Convergence Procedure
  • RA Receive address
  • FCS Frame Check Sequence
  • the sequence in the sequence frame is used to indicate a first identifier corresponding to the user equipment that sends the CCS, and the first identifier includes, for example, STA information; and the RA in the CTS frame is used to indicate that the access point device that receives the CCS corresponds to the first identifier.
  • the second identifier for example, contains AP information.
  • FIG. 3 shows an optional CCS format, the CTS frame is after the pre-sequence frame; it can also be the format shown in Figure 4, that is, the sequence frame is after the pre-CTS frame, Figure 4 is the data of the present invention.
  • FIG. 2 is a CCS signaling structure of an embodiment of the transmission method.
  • the user equipment receives data transmitted by the access point device in a downlink time period of the scheduling time period.
  • the access point device After the user equipment sends the CCS to the access point device in 202, the access point device checks the second identifier in the CTS frame of the CCS to see whether the identifier is the identity of the access point device itself; if yes, The access point device AP obtains a downlink time period corresponding to the scheduling time period of the user equipment according to the first identifier corresponding to the user equipment in the sequence frame, and starts data transmission; if the second identifier in the CTS frame is not the identity of the AP itself The AP will not transmit data to the user equipment during the downlink time period of the scheduling period.
  • the AP2 sends downlink scheduling information to the STA to indicate that the STA wants to perform downlink transmission.
  • the STA as the receiving end device of the downlink transmission, will detect whether the channel of the STA is available; but the STA will find that its channel is unavailable, because the STA is communicating with the API, the STA will not obtain the downlink transmission for the AP2 again.
  • CCS will not be sent to AP2.
  • it does not receive the CCS returned by the STA, and will not transmit data to the STA again, thus avoiding the problem of hidden nodes.
  • AP2 will not interfere with data transmission between the API and the STA.
  • the AP finds that the RA in the CTS frame of the CCS is not information for identifying the device, it indicates that the CCS is not sent. For the device, the AP will not send data according to the Duration in the CTS frame for the duration corresponding to the Duration.
  • the receiving end device is an STA
  • the sending end device is an AP
  • the STA sends the received AP before the channel of the STA is available for listening.
  • Downstream scheduling information, and indication information for identifying a sequence of the STA.
  • the STA determines whether the STA itself is scheduled by the AP according to the downlink scheduling information; if yes, the STA listens to the channel of the STA, and when the channel is available, sends a CCS to the AP, where the CCS carries the STA allocated by the AP.
  • the sequence acts as the first identifier.
  • the indication information of the sequence of the user equipment is received by the user equipment in a process of being associated with an access point device, where the sequence of the user equipment is allocated by the access point device and the user equipment Corresponding sequence.
  • the indication information of the sequence of the user equipment may be that the user equipment, after being associated with the access point device, receives a sequence indication update message sent by the access point device, where the sequence indication update message includes The indication information of the sequence of the user equipment.
  • the receiving end device itself listens to the channel of the receiving end device before the transmission, and only when the channel is available, the transmitting channel clearing signaling indicates that the transmitting end device starts to transmit data, It can avoid the situation of transmission conflicts and ensure the normal operation of data transmission.
  • FIG. 5 is a schematic flowchart of another embodiment of a data transmission method according to the present invention.
  • the method may be used by an access point device to transmit data to a user equipment by using a downlink time period of a scheduling time period, where the method may be an access point device for data transmission. Execution, wherein the method is briefly described, and specific steps can be described in detail in the first embodiment. As shown in FIG. 5, the method may include:
  • the access point device receives the channel clearing signaling sent by the user equipment, where the channel clearing signaling includes a first identifier used to identify the user equipment and a second identifier used to indicate the access point device.
  • the channel clearing signaling is sent by the user equipment when the channel of the user equipment is available for listening.
  • the access point device indicated by the second identifier means that the channel of the user equipment has been determined to be used for data transmission between the user equipment and the access point device indicated by the second identifier, and only the first The access point device indicated by the two identifiers can be in the next step
  • the data is transmitted between the scheduling time period and the user equipment, and the access point device not indicated by the second identifier can no longer transmit data to the user equipment.
  • the access point device when determining that the second identifier is an identifier corresponding to the access point device, transmits data to the user equipment corresponding to the first identifier by using a downlink time period of the scheduling period.
  • the access point device After receiving the CCS, the access point device determines whether the second identifier corresponding to the RA in the CCS is its own corresponding identifier, or whether the RA includes its own AP information; if yes, it may determine The CCS is sent by the STA to itself, and the AP will transmit data to the STA through the downlink time period of the scheduling time period.
  • the method further includes: the access point device sending downlink scheduling information to the user equipment, and a sequence for identifying the user equipment And the indication information, so that the user equipment carries, according to the indication information, the user equipment sequence corresponding to the indication information in the channel clearing signaling as the first identifier; that is, the user equipment sequence is set in the CCS. The location of the sequence.
  • the downlink scheduling information may be that the access point device competes for transmission in a downlink period.
  • the access point device may also send the downlink scheduling information after the downlink time period of the scheduling time period in the downlink period without using the contention; or, the downlink scheduling information is And transmitting, after the channel clearing signaling is sent to the user equipment in the downlink period.
  • the downlink period can be seen in Figure 8 of the subsequent embodiment.
  • the receiving end device itself listens to the channel of the receiving end device before the transmission, and only when the channel is available, the transmitting channel clearing signaling indicates that the transmitting end device starts to transmit data, and then Avoid transmission conflicts and ensure normal data transmission.
  • FIG. 6 is a schematic flowchart of another embodiment of a data transmission method according to the present invention.
  • the method may be used by a user equipment to transmit data to an access point device by using an uplink time period of a scheduling time period, where the method may be an access point device for data transmission. Execution, as shown in FIG. 6, the method may include:
  • the access point device listens before receiving the uplink time period of the scheduling time period. Whether the channel allocated by the inbound device to the associated user equipment is occupied;
  • the method further includes: the access point device sending uplink scheduling information to the user equipment, where the uplink scheduling information is used for scheduling The user equipment uplinks.
  • the uplink scheduling information may be that the access point device competes for transmission in a downlink period.
  • the access point device may also send the uplink scheduling information after the downlink time period of the scheduling time period in the downlink period, without using the contention; or, the downlink scheduling information is And transmitting, after the channel clearing signaling is sent to the user equipment in the downlink period.
  • the access point device sends channel clearing signaling to the user equipment, where the channel clearing signaling includes a third identifier used to identify the access point device, and And identifying a fourth identifier of the network where the user equipment is located;
  • the channel is unoccupied, and the channel between the AP and the STA that will schedule uplink transmission is available, that is, the AP does not perform data transmission with other STAs.
  • the channel clearing signaling CCS is configured to enable the user equipment to determine that the network corresponding to the fourth identifier is a network where the user equipment is located, and the access point device corresponding to the third identifier is an associated access of the user equipment. When the device is clicked, an uplink time period for the scheduling period of data transmission is obtained.
  • the network in which the user equipment is located means that, if a network is composed of three APs, and the user equipment STA accesses the network W through one of the three APs, the network W is The network where the STA is located.
  • the access point device sends the channel clearing signaling to the user equipment, where: the access point device sends a channel clearing signaling to the user equipment, and carries the identifier in the channel clearing signaling.
  • the access point sequence of the access point device is used as the third identifier.
  • the network ID of the STA that receives the CCS may be set at the location of the RA; the CCS is also carried to send the CCS.
  • the identity of the AP for example, is used to identify the AP information. the sequence of.
  • the access point device receives data transmitted by the user equipment in an uplink time period of the scheduling time period.
  • the API when STA1 performs uplink data transmission to the API, the API sends uplink scheduling information to STA1 to indicate STA1 uplink, and the API as the receiving device detects whether the channel of the receiving device is Available, if available, the API will send CCS to STA1.
  • STA1 After STA1 receives the CCS, if the identifier RA in the CTS frame in the CCS is the identifier of STA1, STA1 will start the acquisition of the uplink time period and the transmission of the uplink data in the scheduling period. In this case, the STA1 as the data transmitting device does not send the NAV, so that the NAV does not interfere with the STA2, and the problem of exposing the node is avoided.
  • the receiving end device itself listens to the channel of the receiving end device before the transmission, and only when the channel is available, the transmitting channel clearing signaling indicates that the transmitting end device starts to transmit data, It can avoid the situation of transmission conflicts and ensure the normal operation of data transmission.
  • FIG. 7 is a schematic flowchart of another embodiment of a data transmission method according to the present invention.
  • the method may be used by a user equipment to transmit data to an access point device by using an uplink time period of a scheduling period, where the method may be performed by a user equipment of data transmission.
  • the method may include:
  • the user equipment receives the channel clearing signaling sent by the access point device, where the channel clearing signaling includes a third identifier used to identify the access point device and a network used to identify the user equipment.
  • the channel clearing signaling includes a third identifier used to identify the access point device and a network used to identify the user equipment.
  • the channel clearing signaling is sent by the access point device when the channel of the access point device is available, that is, the channel allocated by the access point device to the associated user equipment in the listening access point device. Sent when not occupied.
  • the user equipment determines that the network corresponding to the fourth identifier is the network where the user equipment is located, and the access point device corresponding to the third identifier is an associated access point device of the user equipment, and obtains an uplink time of the scheduling time period.
  • the segment transmits data to the access point device corresponding to the third identifier by using an uplink time period of the scheduling period.
  • the third identifier is indication information of a sequence of the access point device, where the user sets The device can obtain the sequence of the access point device according to this, and determine whether the access point device is an associated access point device.
  • the user equipment may be the indication information of the sequence of the access point device sent by the access point device in the process of being associated with the access point device; or may be associated with the access point device. Then, receiving a sequence indication update message sent by the access point device, where the sequence indication update message includes indication information of a sequence of the access point device.
  • the method further includes: receiving, by the user equipment, uplink scheduling information sent by the access point device, and according to the uplink The scheduling information determines that the user equipment is scheduled for uplink transmission by the access point device.
  • the receiving end device itself listens to the channel of the receiving end device before the transmission, and only when the channel is available, the transmitting channel clearing signaling indicates that the transmitting end device starts to transmit data, and then Avoid transmission conflicts and ensure normal data transmission.
  • FIG. 8 is a first schematic diagram of a transmission structure of a data transmission method according to another embodiment of the present invention.
  • the row corresponding to L1 is a total transmission structure, and is divided into multiple stages during the transmission time of the L1 line.
  • One phase is called a downlink/uplink transmission round (DL/UL roimd), and several successive DL/UL round (n-1), DL/UL round (n), and DL/UL round are shown in FIG. (n+1).
  • the time of the Uplink Scheduling Phase (UL SP) of the scheduling period is used in each downlink/uplink transmission round, and is used by the STA to transmit uplink data to the AP, and includes a scheduling time period.
  • UL SP Uplink Scheduling Phase
  • the time of the Downlink Scheduling Phase (DL SP) is used by the AP to transmit downlink data to the STA.
  • DL SP Downlink Scheduling Phase
  • the L1 line can be split into L2 lines and L3 lines, that is, the L1 line is formed by superimposing the transmission structure of the AP and the transmission structure of the STA.
  • FIG. 9 is a schematic diagram of signaling of a data transmission method according to another embodiment of the present invention.
  • FIG. 9 is a flowchart showing a process of obtaining a downlink time period of a scheduling period. As shown in FIG. 9, the method may include: 901.
  • the AP sends downlink scheduling information and indication information for identifying a sequence of STAs to the STA.
  • the downlink scheduling information is used by the STA to determine whether the STA is scheduled by the AP.
  • the indication information of the sequence for identifying the STA is that the AP allocates the STA, and the STA can obtain the sequence including the STA information. Sequence.
  • the AP can assign different sequence sequences to different STAs.
  • the AP may send sequence indication information of multiple STAs, and each STA may separately search for the indication information corresponding to the STA.
  • the STA determines, according to the downlink scheduling information, whether it is scheduled by the AP.
  • the process ends, and the subsequent scheduling time period is no longer obtained. If the STA is scheduled by the AP, the 903 is continued.
  • the STA listens to whether the channel of the STA is available.
  • the STA ends the current process, and the subsequent scheduling time period is no longer obtained; otherwise, the execution continues to 904.
  • the STA sends a CCS to the AP, where the CCS includes a sequence of AP information and a sequence of STA information.
  • the sequence of the AP information may be obtained from the AP when the STA is associated with the AP, and the sequence of the STA information may be obtained from the AP in 901. Referring to Fig. 3, the sequence of the AP information is set at the position of the RA of the CTS frame of the CCS, and the sequence of the STA information is set at the position of the sequence in the sequence frame of the CCS.
  • the STA sends a CCS to the AP, which may be the CCS sent by the STA in the L3 line in FIG. 8 before the uplink and downlink switching point.
  • the AP determines, according to the CCS, the STA that sends the CCS, and prepares the downlink data of the STA.
  • the AP may send the downlink scheduling information to the multiple STAs in 901.
  • the CCS sequence corresponding to each STA indicates that it is possible that some of the STAs will not reply to the AP for CCS because the listening channel is busy.
  • the AP will determine which STAs have replied to the CCS. If the CCS is replied and the RA field in the CCS is a sequence of AP information, the AP can determine that the channel at the STA is idle, and the STA can receive downlink data of the AP. Therefore, the AP can prepare the downlink data of the STA.
  • the RA field in the RA field does not identify the sequence of itself.
  • the other APs may also determine that the STA is not ready to receive downlink data of other APs.
  • Other APs may not send according to the Duration in the CTS frame in the CCS within the time indicated by the Duration. data.
  • the AP transmits data to the STA by using a downlink time period of the scheduling time period.
  • the AP that is the L2 line transmits downlink data in the DL SP transmitted in the DL/UL round n.
  • the AP that is the L2 line transmits downlink data in the DL SP transmitted in the DL/UL round n.
  • the AP that is the L2 line transmits downlink data in the DL SP transmitted in the DL/UL round n.
  • the corresponding NAV (DL SP) above the DL SP described in FIG. 8 during this window time, it is not interfered by other APs, because as described in 905, other APs receive even if CCS will also stop transmitting data during the Duration time because the RA in the CTS frame is not its own corresponding identifier.
  • FIG. 10 is a schematic diagram of signaling according to another embodiment of a data transmission method according to the present invention.
  • FIG. 10 is a flowchart showing an obtaining process of an uplink time period of a scheduling time period. As shown in FIG. 10, the method may include:
  • the AP sends uplink scheduling information to the STA.
  • the uplink scheduling information is used to indicate that the STA performs uplink transmission.
  • it may be the scheduling information Sch Info sent in the DL/UL round n of the AP of the L2 row in Figure 8.
  • the AP listens to whether the channel of the AP is available.
  • the AP ends the current process and no longer obtains the scheduled scheduling period; otherwise, continues to perform 1003.
  • the AP sends a CCS to the STA, where the CCS includes a sequence of AP information and a sequence of STA information.
  • it may be the CCS sent by the AP of the L2 row in FIG. 8 before the downlink uplink switching point in the DL/UL round n.
  • the STA determines, according to the CCS, whether the information about the associated AP is included.
  • the STA obtains the CCS sequence information of the AP when it is associated with the AP, so it can be determined in this step whether it is the CCS sent by the associated AP. Specifically, according to the sequence in the sequence frame in the CCS, it is determined whether the sequence is an association. Sequence information of the AP.
  • the STA ends the current process and does not obtain the subsequent scheduling time period; otherwise, it continues to execute 1005.
  • the STA transmits data to the AP by using an uplink time period of the scheduling time period.
  • the STA of the L3 row in FIG. 8 may perform uplink transmission in the uplink time period (UL SP) of the scheduling period in the UL period of the DL/UL round n.
  • UL SP uplink time period
  • the STA transmits the scheduling information (Sch lnfo ) received from the AP in the downlink period (DL period), immediately after the uplink and downlink switching point in the uplink period, and broadcasts to other user equipments. That is, the Sch Info sent by the UL SP in the DL/UL round n in FIG.
  • the sending of the scheduling information may enable other STAs to know how long the current uplink scheduling will take.
  • FIG. 11 is a schematic diagram of a transmission structure of another embodiment of a data transmission method according to the present invention.
  • an uplink time period of a scheduling period an AP may be followed by a DL SP of a previous DL/UL round.
  • the specified time is reserved for CCS to send.
  • the STA may reserve the designated time for transmission to the CCS immediately after the UL SP of the DL/ULround.
  • FIG. 12 is a schematic diagram of a transmission structure of another embodiment of the data transmission method according to the present invention.
  • the AP may send the CCS and then send the scheduling information Sch lnfo, and the scheduling information Sch lnfo only needs to be tight. Then CCS can send it.
  • the AP first sends uplink scheduling information to the STA, and then listens to whether the AP channel is available. If the channel is unavailable, the AP ends the current process, and the subsequent process is no longer obtained. The scheduling time period; otherwise, the CCS is sent to the STA; then in this process, the AP first sends the uplink scheduling information, and then sends the CCS.
  • the AP may also listen to the channel first, and when the AP channel is idle, send the CCS to the STA; and then send the uplink scheduling information to the STA after the CCS. That is, the order of CCS and uplink scheduling information is optional.
  • the CCS or scheduling information can be continuous with the previous scheduling time period without the need to send scheduling information through contention, and the transmission time of the CCS is still transmitted at the specified time.
  • FIG. 13 is a schematic structural diagram of an embodiment of a user equipment according to an embodiment of the present invention.
  • the device when the user equipment is used as a receiving end device for downlink data transmission, the device may include: a first channel listening unit 1301, a first letter. a sending unit 1302 and a first data receiving unit 1303; wherein The first channel listening unit 1301 is configured to: before the obtaining the downlink time period of the scheduling time period, listen to whether the channel allocated by the associated access point device of the user equipment is occupied;
  • the first signaling sending unit 1302 is configured to: when the channel is not occupied, send channel clearing signaling to the access point device, where the channel clearing signaling includes a first identifier used to identify the user equipment, and Identifying the second identifier of the access point device, so that the access point device obtains a downlink for a scheduling period of data transmission after determining that the second identifier is an identifier corresponding to the access point device period;
  • the first data receiving unit 1303 is configured to receive data transmitted by the access point device during a downlink time period of the scheduling period.
  • Figure 14 is a schematic structural diagram of another embodiment of the user equipment of the present invention.
  • the device may further include an information acquiring unit 1304;
  • the information acquiring unit 1304 is configured to receive downlink scheduling information sent by the access point device, and indication information used to identify the user equipment sequence, before the first channel listening unit 1301 listens to whether the channel is occupied. And determining, according to the downlink scheduling information, that the user equipment is scheduled to be downlinked by the access point device;
  • the first signaling sending unit 1302 is configured to: when the channel clearing signaling is sent, send the channel clearing signaling to the access point device, and carry the information obtained according to the indication information according to the indication information.
  • a sequence of user equipment is used as the first identifier.
  • the information acquiring unit 1304, when receiving the indication information, is specifically configured to be received in a process of being associated with the access point device, where the sequence of the user equipment is the access point device allocation. a sequence corresponding to the user equipment; or, after being associated with the access point device, receiving a sequence indication update message sent by the access point device, where the sequence indication update message includes the user equipment The indication of the sequence.
  • FIG. 15 is a schematic structural diagram of an access point device according to an embodiment of the present invention. As shown in FIG. 15, when the access point device is used as a transmitting end device for downlink data transmission, the device may include: a first signaling receiving unit 1501. And a first data transmitting unit 1502; wherein
  • the first signaling receiving unit 1501 is configured to receive channel clearing signaling sent by the user equipment, where the channel clearing signaling includes a first identifier used to identify the user equipment, and a a second identifier; the channel clearing signaling is used by the user equipment to detect Transmitted when the channel allocated by the associated access point device of the user equipment is not occupied;
  • the first data sending unit 1502 is configured to: when determining that the second identifier is an identifier corresponding to the access point device, transmit data to the user equipment corresponding to the first identifier by using a downlink time period of the scheduling period .
  • FIG. 16 is a schematic structural diagram of another embodiment of an access point device according to the present invention.
  • the device may further include a scheduling control unit 1503;
  • the scheduling control unit 1503 is configured to send, to the user equipment, downlink scheduling information, and a sequence for identifying the user equipment, before the first signaling receiving unit receives the channel clearing signaling sent by the user equipment. Instructing the information, so that the user equipment carries the user equipment sequence corresponding to the indication information as the first identifier in the channel clearing signaling according to the indication information.
  • the scheduling control unit 1503 when transmitting the downlink scheduling information to the user equipment, specifically, is used to advertise the downlink scheduling information in a downlink period; or, the downlink scheduling information is in the downlink period. After the downlink time period of the scheduling period is sent, the downlink scheduling information is sent after the channel clearing signaling is sent to the user equipment in the downlink period.
  • FIG. 17 is a schematic structural diagram of still another embodiment of an access point device according to the present invention. As shown in FIG. 17, when the access point device is used as a receiving end device for uplink data transmission, the device includes: a second channel listening unit 1701 a second signaling transmitting unit 1702 and a second data receiving unit 1703; wherein
  • the second channel listening unit 1701 is configured to: before the obtaining the uplink time period of the scheduling time period, listen to whether the channel allocated by the access point device for the associated user equipment is occupied;
  • a second signaling sending unit 1702 configured to send channel clearing signaling to the user equipment when the channel is not occupied, where the channel clearing signaling includes a third identifier used to identify the access point device And the fourth identifier that is used to identify the network where the user equipment is located, so that the user equipment determines that the network corresponding to the fourth identifier is the network where the user equipment is located, and the access point device corresponding to the third identifier Obtaining an uplink time period of a scheduling time period for data transmission when the user equipment is associated with the access point device;
  • the second data receiving unit 1703 is configured to receive the uplink time period of the scheduling time period. The data transmitted by the user equipment.
  • FIG. 18 is a schematic structural diagram of another embodiment of an access point device according to the present invention.
  • the device may further include: an information sending unit 1704;
  • the information sending unit 1704 is configured to send uplink scheduling information to the user equipment before or after the second signaling sending unit 1702 sends the channel clearing signaling, where the uplink scheduling information is used to schedule uplink transmission of the user equipment. ;
  • the second signaling sending unit 1702 is configured to: when the channel clearing signaling is sent to the user equipment, carry the access point sequence used to identify the access point device as the The third logo.
  • the information sending unit 1704 when the user equipment sends the uplink scheduling information, specifically, is used to advertise the uplink scheduling information in a downlink period; or, the uplink scheduling information is in the downlink period. After the downlink time period of the scheduling period is sent, the uplink scheduling information is sent after the channel clearing signaling is sent to the user equipment in the downlink period.
  • FIG. 19 is a schematic structural diagram of another embodiment of a user equipment according to the present invention.
  • the device when the user equipment is used as a transmitting end device for uplink data transmission, the device may include: a second signaling receiving unit 1901 and a second a data transmitting unit 1902; wherein
  • the second signaling receiving unit 1901 is configured to receive channel clearing signaling sent by the access point device, where the channel clearing signaling includes a third identifier used to identify the access point device, and is used to identify the user equipment.
  • the fourth identifier of the network is located; the channel clearing signaling is sent by the access point device when the channel allocated by the access point device for the associated user equipment is not occupied;
  • the second data sending unit 1902 is configured to determine that the network corresponding to the fourth identifier is the network where the user equipment is located, and the access point device corresponding to the third identifier is an associated access point device of the user equipment. Obtaining an uplink time period of the scheduling period and transmitting data to the access point device corresponding to the third identifier by using an uplink time period of the scheduling period.
  • the second signaling receiving unit 1901 is further configured to: before the user equipment receives the channel clearing signaling sent by the access point device, receive uplink scheduling information sent by the access point device, and Determining, according to the uplink scheduling information, that the user equipment is scheduled to be uplinked by the access point device. Further, the second signaling receiving unit 1901, when receiving the uplink scheduling information sent by the access point device, is specifically configured to receive the access point device in a process associated with the access point device. Or the indication information of the sequence of the sent access point device; or, after being associated with the access point device, receiving a sequence indication update message sent by the access point device, where the sequence indication update message includes the access Indicates the sequence of the device.
  • the second data sending unit 1902 is further configured to broadcast the uplink scheduling information received by the second signaling receiving unit to other user equipments after an uplink and downlink switching point in an uplink period.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the above-described method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明提供一种数据传输方法和设备,其中方法包括:用户设备在获得调度时间段的下行时间段之前,侦听所述用户设备的关联接入点设备分配的信道是否被占用;若所述信道未被占用,则所述用户设备向所述接入点设备发送信道清空信令,所述信道清空信令包括用于标识所述用户设备的第一标识以及用于标识所述接入点设备的第二标识;所述用户设备在所述调度时间段的下行时间段接收所述接入点设备传输的数据。本发明保证了数据传输的正常进行。

Description

数据传输方法和设备
技术领域
本发明涉及通信技术, 尤其涉及一种数据传输方法和设备。 背景技术
为了适应日益增加的数据传输需求, 缓解无线网络的负载, 当前一种升 级技术就是增加频谱资源, 以传输更多的信息。 对于受到频谱管理机构严格 管控的频谱, 通过购买执照的方式获得的频谱很难连续分布, 需要通过利用 频谱资源碎片的技术来提高数据传输峰值速率。 对于免费频谱, 无线设备只 要符合功率限制就可以使用, 但是, 无线通信的数据传输通常需要一定的信 噪比, 而免费频谱随时都有可能被某些设备使用, 因而使用免费频谱进行通 信同样需要通过利用频谱资源碎片的技术来提高数据传输峰值速率。
数据通信的迅速发展, 使得 802.11具有越来越多的应用场景和越来越广 阔的市场; 由于承载数据传输的网络资源是有限的, 而且 802.11标准是基于 载波监听多路访问 /冲突检测 (Carrier Sense Multiple Access/Collision Detect, 简称: CSMA/CA) 的机制, 只要存在竞争网络资源的情况, 就会出现服务质 量 (Quality of Service, 简称: QoS) 的问题。 首先, 由于数据传输量增长和 数据业务分类细化, 从而对传输资源分配、 传送时延、 数据丢包率以及时延 抖动提出了更高的要求。 其次, 由于总传输资源有限, 某类业务占用越多传 输资源传输数据, 那么其他的业务能用来传输数据的传输资源就越少, 因而 对 802.11网络中各种业务的传输资源的规划和分配同样提出了更高的要求。 然而调度传输方式恰好可以很好地解决 QoS的问题, 同时需要兼容传统的无 线局域网系统, 因而需要在竞争传输系统中提供一种调度传输的方案。
在 802.11系统中存在着如下的隐藏节点和暴露节点的问题。 其中, 隐藏 节点问题是指比如当接入点(Access Point,简称: AP)1在向用户设备(Station, 简称: STA) 传输数据时, 而 AP2并不知道, 因而也开始向 STA传输数据, 从而导致 STA无法正确接收 API的数据。暴露节点问题是指比如当 STA1在 向 API 传输数据, 而 STA2 听到 STA1 发送数据时设置的网络分配矢量 (Network Allocation Vector, 简称: NAV) , 从而导致 STA2无法向 AP2传 输数据, 然而此时 STA2发送数据并不影响 API的接收, 降低了系统资源的 使用率。 这些问题都导致竞争传输不能正常进行。 发明内容 本发明提供一种数据传输方法和设备, 以保证数据传输的正常进行。 第一方面, 提供一种数据传输方法, 所述方法包括:
用户设备在获得调度时间段的下行时间段之前, 侦听所述用户设备的 关联接入点设备分配的信道是否被占用;
若所述信道未被占用, 则所述用户设备向接入点设备发送信道清空信 令, 所述信道清空信令包括用于标识所述用户设备的第一标识以及用于标 识所述接入点设备的第二标识, 以使得所述接入点设备在确定所述第二标 识是所述接入点设备对应的标识后获得用于数据传输的调度时间段的下 行时间段;
所述用户设备在所述调度时间段的下行时间段接收所述接入点设备 传输的数据。
根据第一方面, 在第一种可能的实现方式中, 在所述侦听所述用户设 备的关联接入点设备分配的信道是否被占用之前, 还包括: 所述用户设备 接收所述接入点设备发送的下行调度信息、 以及用于标识所述用户设备的 序列的指示信息; 并根据所述下行调度信息确定所述用户设备被所述接入 点设备调度下行传输; 所述第一标识包括所述用户设备根据所述指示信息 获取的所述用户设备的序列。
根据第一方面或第一方面的第一种可能的实现方式, 在第二种可能的 实现方式中, 所述用户设备的序列的指示信息是所述用户设备在与所述接 入点设备关联的过程中接收, 所述用户设备的序列是所述接入点设备分配 的与所述用户设备对应的序列。
根据第一方面或第一方面的第一种可能的实现方式, 在第三种可能的 实现方式中, 所述用户设备的序列的指示信息是所述用户设备在与所述接 入点设备关联之后, 接收所述接入点设备发送的序列指示更新消息, 所述 序列指示更新消息包含所述用户设备的序列的指示信息。 根据第一方面或上述可能的实现方式, 在第四种可能的实现方式中, 所述信道清空信令包括允许发送帧和序列帧, 所述允许发送帧中包括所述 第二标识以及网络分配矢量, 所述序列帧中包括所述第一标识。
第二方面, 提供一种数据传输方法, 所述方法包括:
接入点设备接收用户设备发送的信道清空信令, 所述信道清空信令包 括用于标识所述用户设备的第一标识以及用于指示接入点设备的第二标 识; 所述信道清空信令是所述用户设备在侦听到所述用户设备的关联接入 点设备分配的信道未被占用时发送的;
所述接入点设备在确定所述第二标识是所述接入点设备对应的标识 时, 通过所述调度时间段的下行时间段向所述第一标识对应的用户设备传 输数据。
根据第二方面, 在第一种可能的实现方式中, 在所述接入点设备接收 所述用户设备发送的信道清空信令之前, 还包括: 所述接入点设备向所述 用户设备发送下行调度信息、 以及用于标识所述用户设备的序列的指示信 息, 以使得所述用户设备根据所述指示信息在所述信道清空信令携带所述 指示信息对应的用户设备序列作为所述第一标识。
根据第二方面及第二方面的第一种可能的实现方式, 在第二种可能的 实现方式中, 所述接入点设备在下行周期竞争发送所述下行调度信息; 或者, 所述接入点设备将所述下行调度信息在所述下行周期内的调度 时间段的下行时间段之后发送;
或者, 所述接入点设备将所述下行调度信息在所述下行周期内向所述 用户设备发送信道清空信令之后发送。
第三方面, 提供一种数据传输方法, 所述方法包括:
接入点设备在获得调度时间段的上行时间段之前, 侦听所述接入点设 备为关联用户设备分配的信道是否被占用;
若所述信道未被占用, 则所述接入点设备向所述用户设备发送信道清 空信令, 所述信道清空信令包括用于标识所述接入点设备的第三标识以及 用于标识所述用户设备所在网络的第四标识, 以使得所述用户设备在确定 所述第四标识对应的网络是用户设备所在网络并且所述第三标识对应的 接入点设备是所述用户设备的关联接入点设备时获得用于数据传输的调 度时间段的上行时间段;
所述接入点设备在所述调度时间段的上行时间段接收所述用户设备 传输的数据。
根据第三方面, 在第一种可能的实现方式中, 在所述接入点设备向所 述用户设备发送信道清空信令之前或之后, 还包括: 所述接入点设备向所 述用户设备发送上行调度信息, 所述上行调度信息用于调度所述用户设备 上行传输; 所述接入点设备向用户设备发送信道清空信令, 包括: 所述接 入点设备向用户设备发送信道清空信令, 并在所述信道清空信令中携带用 于标识所述接入点设备的接入点序列作为所述第三标识。
根据第三方面或第三方面的第一种可能的实现方式, 在第二种可能的 实现方式中, 所述接入点设备在下行周期竞争发送所述上行调度信息; 或者, 所述接入点设备将所述上行调度信息在所述下行周期内的调度 时间段的下行时间段之后发送;
或者, 所述接入点设备将所述上行调度信息在所述下行周期内向所述 用户设备发送信道清空信令之后发送。
根据第三方面, 在第三种可能的实现方式中, 所述信道清空信令包括 允许发送帧和序列帧, 所述允许发送帧中包括所述第三标识以及网络分配 矢量, 所述序列帧中包括所述第四标识。
第四方面, 提供一种数据传输方法, 所述方法包括:
用户设备接收接入点设备发送的信道清空信令, 所述信道清空信令包 括用于标识所述接入点设备的第三标识以及用于标识所述用户设备所在 网络的第四标识; 所述信道清空信令是所述接入点设备在侦听接入点设备 为关联用户设备分配的信道未被占用时发送的;
所述用户设备在确定所述第四标识对应的网络是所述用户设备所在 网络, 并且所述第三标识对应的接入点设备是所述用户设备的关联接入点 设备时, 获得调度时间段的上行时间段并通过所述调度时间段的上行时间 段向所述第三标识对应的所述接入点设备传输数据。
根据第四方面, 在第一种可能的实现方式中, 所述第三标识是所述接 入点设备的序列的指示信息;
在所述用户设备接收接入点设备发送的信道清空信令之前, 还包括: 所述用户设备在与所述接入点设备关联的过程中, 接收所述接入点设 备发送的接入点设备的序列的指示信息。
根据第四方面, 在第二种可能的实现方式中, 所述第三标识是所述接 入点设备的序列的指示信息;
在所述用户设备接收接入点设备发送的信道清空信令之前, 还包括: 所述用户设备在与所述接入点设备关联之后, 接收所述接入点设备发 送的序列指示更新消息, 所述序列指示更新消息包含所述接入点设备的序 列的指示信息。
根据第四方面, 在第三种可能的实现方式中, 在所述用户设备接收所 述接入点设备发送的信道清空信令之前或之后, 还包括:
所述用户设备接收所述接入点设备发送的上行调度信息, 并根据所述 上行调度信息确定所述用户设备被所述接入点设备调度上行传输。
根据第四方面及第四方面的第三种可能的实现方式, 在第四种可能的 实现方式中, 所述用户设备将所述上行调度信息, 在上行周期中的上行下 行切换点后向其他用户设备进行广播。
第五方面, 提供一种用户设备, 所述设备包括:
第一信道侦听单元, 用于在获得所述调度时间段的下行时间段之前, 侦听用户设备的关联接入点设备分配的信道是否被占用;
第一信令发送单元, 用于在所述信道未被占用时, 向接入点设备发送 信道清空信令, 所述信道清空信令包括用于标识所述用户设备的第一标识 以及用于标识所述接入点设备的第二标识, 以使得所述接入点设备在确定 所述第二标识是所述接入点设备对应的标识后获得用于数据传输的调度 时间段的下行时间段;
第一数据接收单元, 用于在所述调度时间段的下行时间段接收所述接 入点设备传输的数据。
根据第五方面, 在第一种可能的实现方式中, 信息获取单元, 用于在 所述第一信道侦听单元侦听信道是否被占用之前, 接收所述接入点设备发 送的下行调度信息、 以及用于标识所述用户设备序列的指示信息; 并根据 所述下行调度信息确定所述用户设备被所述接入点设备调度下行传输; 所 述第一信令发送单元, 在发送所述信道清空信令时, 具体用于向接入点设 备发送信道清空信令, 并根据所述指示信息携带根据所述指示信息获取的 所述用户设备的序列作为所述第一标识。
根据第五方面及第五方面的第一种可能的实现方式中, 在第二种可能 的实现方式中, 所述信息获取单元, 在接收所述指示信息时, 具体是用于 在与所述接入点设备关联的过程中接收, 所述用户设备的序列是所述接入 点设备分配的与所述用户设备对应的序列; 或者, 是在与所述接入点设备 关联之后, 接收所述接入点设备发送的序列指示更新消息, 所述序列指示 更新消息包含所述用户设备的序列的指示信息。
第六方面, 提供一种接入点设备, 所述设备包括:
第一信令接收单元, 用于接收所述用户设备发送的信道清空信令, 所 述信道清空信令包括用于标识所述用户设备的第一标识以及用于指示接 入点设备的第二标识; 所述信道清空信令是所述用户设备在侦听到用户设 备的关联接入点设备分配的信道未被占用时发送的;
第一数据发送单元, 用于在确定所述第二标识是所述接入点设备对应 的标识时, 通过所述调度时间段的下行时间段向所述第一标识对应的用户 设备传输数据。
根据第六方面, 在第一种可能的实现方式中, 还包括: 调度控制单元, 用于在所述第一信令接收单元接收所述用户设备发送的信道清空信令之 前, 向所述用户设备发送下行调度信息、 以及用于标识所述用户设备的序 列的指示信息, 以使得所述用户设备根据所述指示信息在所述信道清空信 令携带所述指示信息对应的用户设备序列作为第一标识。
根据第六方面及第六方面的第一种可能的实现方式中, 在第二种可能 的实现方式中, 所述调度控制单元, 在向所述用户设备发送下行调度信息 时, 具体是用于在下行周期竞争发送所述下行调度信息; 或者, 将所述下 行调度信息在所述下行周期内的调度时间段的下行时间段之后发送; 或 者, 将所述下行调度信息在所述下行周期内向所述用户设备发送信道清空 信令之后发送。
第七方面, 提供一种接入点设备, 所述设备包括:
第二信道侦听单元, 用于在获得调度时间段的上行时间段之前, 侦听 所述接入点设备为关联用户设备分配的信道是否被占用; 第二信令发送单元, 用于在所述信道未被占用时, 向所述用户设备发 送信道清空信令, 所述信道清空信令包括用于标识所述接入点设备的第三 标识以及用于标识所述用户设备所在网络的第四标识, 以使得所述用户设 备在确定所述第四标识对应的网络是所述用户设备所在网络并且所述第 三标识对应的接入点设备是所述用户设备的关联接入点设备时获得用于 数据传输的调度时间段的上行时间段;
第二数据接收单元, 用于在所述调度时间段的上行时间段接收所述用 户设备传输的数据。
根据第七方面, 在第一种可能的实现方式中, 还包括: 信息发送单元, 用于在所述第二信令发送单元发送信道清空信令之前或之后, 向所述用户 设备发送上行调度信息, 所述上行调度信息用于调度所述用户设备上行传 输;所述第二信令发送单元,具体用于在向用户设备发送信道清空信令时, 在所述信道清空信令中携带用于标识所述接入点设备的接入点序列作为 所述第三标识。
根据第七方面及第七方面的第一种可能的实现方式, 在第二种可能的 实现方式中, 所述信息发送单元, 在所述用户设备发送上行调度信息时, 具体是用于在下行周期竞争发送所述上行调度信息; 或者, 将所述上行调 度信息在所述下行周期内的调度时间段的下行时间段之后发送; 或者, 将 所述上行调度信息在所述下行周期内向所述用户设备发送信道清空信令 之后发送。
第八方面, 提供一种用户设备, 所述设备包括:
第二信令接收单元, 用于接收接入点设备发送的信道清空信令, 所述 信道清空信令包括用于标识所述接入点设备的第三标识以及用于标识所 述用户设备所在网络的第四标识; 所述信道清空信令是所述接入点设备在 侦听接入点设备为关联用户设备分配的信道未被占用时发送的;
第二数据发送单元, 用于在确定所述第四标识对应的网络是所述用户 设备所在网络, 并且所述第三标识对应的接入点设备是所述用户设备的关 联接入点设备时, 获得调度时间段的上行时间段并通过所述调度时间段的 上行时间段向所述第三标识对应的所述接入点设备传输数据。
根据第八方面,在第一种可能的实现方式中,所述第二信令接收单元, 还用于在所述用户设备接收所述接入点设备发送的信道清空信令之前或 之后, 接收所述接入点设备发送的上行调度信息, 并根据所述上行调度信 息确定所述用户设备被所述接入点设备上行调度。
根据第八方面及第八方面的第一种可能的实现方式, 在第二种可能的 实现方式中, 所述第二信令接收单元, 在接收所述接入点设备发送的上行 调度信息时, 具体是用于在与所述接入点设备关联的过程中, 接收所述接 入点设备发送的接入点设备的序列的指示信息; 或者, 在与所述接入点设 备关联之后, 接收所述接入点设备发送的序列指示更新消息, 所述序列指 示更新消息包含所述接入点设备的序列的指示信息。
根据第八方面及第八方面的第一种可能的实现方式, 在第三种可能的 实现方式中, 所述第二数据发送单元, 还用于将所述第二信令接收单元接 收的所述上行调度信息, 在上行周期中的上行下行切换点后向其他用户设 备进行广播。
上述方案中, 通过由数据传输的接收端设备自己在传输前侦听其本端 信道, 在其本端信道可用时才通过发送信道清空信令指示发送端设备开始 传输数据, 就可以避免传输冲突的情况, 比如隐藏节点问题中的 STA 就 可以由于其本端信道被占用而不会向 AP2发送信道清空信令,阻止了 AP2 向其传输数据; 而对于暴露节点问题, 将只由作为接收端设备的 API通过 发送信道清空信令指示 STA1传输数据, 发送端的 STA1不会再发送现有 的 NAV, 从而避免了对 STA2的数据传输造成干扰。 因此, 采用本发明实 施例的方案保证了数据传输的正常进行。 附图说明 图 1为本发明数据传输方法实施例适用的一种可选场景;
图 2为本发明数据传输方法一实施例的流程示意图;
图 3为本发明数据传输方法一实施例的 CCS信令结构图一; 图 4为本发明数据传输方法一实施例的 CCS信令结构图二; 图 5为本发明数据传输方法另一实施例的流程示意图;
图 6为本发明数据传输方法又一实施例的流程示意图;
图 7为本发明数据传输方法又一实施例的流程示意图; 图 8为本发明数据传输方法又一实施例的传输结构示意图一; 图 9为本发明数据传输方法又一实施例的信令示意图;
图 10为本发明数据传输方法又一实施例的信令示意图;
图 11为本发明数据传输方法又一实施例的传输结构示意图二; 图 12为本发明数据传输方法又一实施例的传输结构示意图三; 图 13为本发明用户设备一实施例的结构示意图;
图 14为本发明用户设备另一实施例的结构示意图;
图 15为本发明接入点设备一实施例的结构示意图;
图 16为本发明接入点设备另一实施例的结构示意图;
图 17为本发明接入点设备又一实施例的结构示意图;
图 18为本发明接入点设备再一实施例的结构示意图;
图 19为本发明用户设备又一实施例的结构示意图。 具体实施方式
本发明实施例中将通信系统的频带资源划分为若干个成员载波
( Component Carrier, 简称 CC ) , 所有的成员载波的带宽都是可以变化 的。
其中, 载波聚合是聚合两个或更多的成员载波, 在无线局域网的载波 聚合方式中, 可以采用竞争与调度混合的模式, 各成员载波的传输时间分 为调度时间段和竞争时间段, 竞争时间段用于竞争获得传输数据, 在调度 时间段中调度上述竞争得到的传输数据。 可理解的是, 各个成员载波上的 数据传输也是基于竞争的, 例如通过现有技术中的 CSMA/CA。 CSMA/CA 机制进行所述竞争, 即通过竞争获得发送数据的机会。 调度时间段
( Scheduling Phase, 简称: SP )可以为在成员载波上通过竞争获得进行上 行或下行传输的时间段, 竞争时间段 (Contention Phase, 简称 CP) 可以 为在成员载波上除调度时间段之外的时间段, 当然调度时间段和竞争时间 段也可以被称为其他名称, 也属于本发明保护的范围。
本发明实施例提供了一种数据传输方法, 该方法用于解决当前存在的 隐藏节点和暴露节点的问题, 以使得数据进行数据传输时能够不受到干 扰,保证数据传输的正常进行。该方法可以用于无线局域网中的数据传输, 例如用于 lOGiFi; 并且本实施例的数据传输方法可以用于竞争获取调度时 间段的场景。 也就是说, 调度传输方法可以包括: 调度传输方式以及竞争 传输方式, 其中, 所述竞争传输方式的具体传输方法可以基于现有的 CSMA/CA竞争机制实现, 以便与现有技术兼容。
图 1为本发明数据传输方法实施例适用的一种可选场景,如图 1所示, 本发明实施例的数据传输可以用于用户设备 STA与接入点设备 AP之间传 输数据; 其中, 该传输数据可以是 AP向 STA进行下行数据传输, 在下行 数据传输时, AP作为本次数据传输的发送端设备, STA作为接收端设备; 或者, 也可以是 STA向 AP进行上行数据传输, 在上行数据传输时, STA 作为本次数据传输的发送端设备, AP作为接收端设备。 并且, 在本发明 实施例中, 下行数据要通过获得的调度时间段的下行时间段发送, 上行数 据要通过获得的调度时间段的上行时间段发送。 即采用本发明实施例的方 法可以用于发送端设备通过调度时间段向接收端设备传输数据。
为方便理解调度时间段、上行时间段、和下行时间段, 简单说明如下: 通常, 各个成员载波在时间上通过上下行切换点划分为成员载波的上 行时间和成员载波的下行时间, 不同成员载波的上下行切换点在时间上一 致, 也即各个成员载波的上下行切换点在时间上对齐。 举例来说, 网络侧 设备可确定上下行切换点,在各个成员载波的上行时间和 /或下行时间内周 期性广播所述上下行切换点给各个用户设备。
成员载波的上行时间和下行时间的时间长度相同, 也即相邻两个上下 行切换点之间的时间长度相同。 所述时间长度的具体数值可以自主设置, 且可以在实际应用中进行数值更新和改变, 这里并不限定。 但是, 成员载 波的上行时间和下行时间的时间长度也可以不同, 本发明实施例并不限 制。
其中, 在成员载波的上行时间内, 网络侧设备 (如: AP) 能够调度用 户设备使用各个空闲的成员载波将上行业务数据发送至网络侧设备; 在成 员载波的下行时间内, 网络侧设备能够调度网络侧设备使用各个空闲的成 员载波将下行业务数据发送至各个用户设备。
所述调度时间段可以由网络侧设备在成员载波的下行时间通过竞争 获得, 也可以由网络侧设备在成员载波的上行时间通过竞争获得, 可以在 调度时间段竞争成功之后释放所述调度时间段的全部时间段或者部分时 间段; 所述调度时间段也被所述上下行切换点划分为调度时间段的上行时 间段和调度时间段的下行时间段, 调度时间段的上行时间段内的传输数据 对应上行传输资源, 调度时间段的下行时间段内的传输数据对应下行传输 资源, 调度时间段的上下行时间段是成员载波的上下行时间的部分或全 部。
调度时间段的下行时间段内的下行传输资源用于网络侧设备与用户 设备进行下行传输, 调度时间段的上行时间段内的上行传输资源用于用户 设备与网络侧设备进行上行传输。
其中, 网络侧设备根据对至少一个成员载波竞争成功得到的传输数据 的信息确定所述至少一个成员载波对应的调度时间段的起止时间。
实施例一
图 2为本发明数据传输方法一实施例的流程示意图, 该方法可以用于 接入点设备通过调度时间段的下行时间段向用户设备传输数据, 该方法可 以是数据传输的用户设备执行, 如图 2所示, 该方法可以包括:
201、 用户设备在获得调度时间段的下行时间段之前, 侦听所述用户 设备的关联接入点设备分配的信道是否被占用;
其中, 用户设备 STA在下行传输时是数据的接收端设备。 获得调度 时间段指的是, 不论是 AP还是 STA, 其传输时间都被分割为上行传输时 间段和下行传输时间段,在上行传输时间段内要在 AP和 STA之间获得调 度时间段的上行时间段, 由 STA向 AP传输上行数据; 在下行传输时间段 内要在 AP和 STA之间获得调度时间段的下行时间段,由 AP向 STA传输 下行数据; 本实施例中, 获得调度时间段之前通常可以是指上行传输时间 段和下行传输时间段的切换时间点附近。
本实施例中, 用户设备在获得调度时间段之前, 需要侦听用户设备的 关联接入点设备分配的信道是否被占用, 也就是用户设备要侦听用户设备 的信道是否可用。例如, 当需要获得 AP向 STA传输的调度时间段的下行 时间段时, 将由 STA侦听其接收端的信道是否可用。 其中, 上述的用户 设备的关联接入点设备即 STA的关联 AP, 指的是该 STA是与该关联 AP 建立连接的, 并可以通过该关联 AP接入网络的。 202、 若所述信道未被占用, 则所述用户设备向接入点设备发送信道 清空信令, 所述信道清空信令包括用于标识所述用户设备的第一标识以及 用于标识所述接入点设备的第二标识;
其中, 在 201中如果用户设备侦听所述用户设备端的信道可用, 即信 道未被占用, 则用户设备将向发送端设备 (本发明实施例中的发送端设备 和接收端设备是从数据传输的角度说的, 发送数据的即发送端设备, 接收 数据的即接收端设备。 比如上面所描述过的, 传输数据可以是 AP向 STA 进行下行数据传输, 在下行数据传输时, AP作为本次数据传输的发送端 设备, STA作为接收端设备; 或者, 也可以是 STA向 AP进行上行数据传 输, 在上行数据传输时, STA作为本次数据传输的发送端设备, AP作为 接收端设备)发送信道清空信令 (Channel Clear Signaling, 简称: CCS ) , 该 CCS中包括上述的第一标识以及第二标识, 以使得接入点设备在确定 所述第二标识是所述接入点设备对应的标识时启动数据传输。 该 CCS的 作用可以举例如下, 比如, 某个 AP接收到 UE发送的 CCS, 那么 AP可 以查看第二标识, 如果该第二标识是该 AP自己的标识, 则表明 AP可以 占用该信道, 该信道对于所述 AP来说, 是未被其他 AP占用的, AP S 可以使用该信道; 而如果其他 AP接收到 CCS, 并且通过第二标识查看不 是该其他 AP自己的标识, 那么则表明这个信道对于其他 AP来说, 是已 经被占用的信道, 该其他 AP是不能再使用该信道了。 所以, 从 UE的角 度来说, 假设 UE接收到第一 AP发送的调度信息, 该调度信息用于通知 UE第一 AP要向其发送下行数据,那么 UE侦听信道时是在侦听信道是否 被第一 AP之外的 AP所占用, 如果该信道未被占用, 则 UE将向第一 AP 发送 CCS。 其中, 所述的第一标识的作用是, 当 AP根据第二标识确定要 启动数据传输时, 可以根据第一标识找到 UE, 向第一标识对应的 UE传 输数据。
例如, 参见图 3, 图 3为本发明数据传输方法一实施例的 CCS信令结 构图一, 该 CCS可以包括允许发送帧 (Clear to Send, 简称: CTS ) 和序 列帧。 其中, CTS帧包括物理层汇聚协议 (Physical Layer Convergence Procedure, 简称: PLCP) 头 (Header) 、 帧控制 ( Frame control ) 、 持续 时间 (Duration, 相当于 NAV, 该 NAV主要用于限定信道的占用时间) 、 接收地址 (Reception address, 简称: RA) 以及帧检验序列 (Frame Check Sequence,简称: FCS );而序列帧包括 PLCP Header以及序列 sequence。 在序列帧中的 sequence用于表示发送该 CCS的用户设备对应的第一标识, 该第一标识例如包含 STA信息; 而 CTS帧中的 RA用于表示接收该 CCS 的接入点设备对应的第二标识, 该第二标识例如包含 AP信息。
如图 3所示, CTS帧和序列帧之间有固定时间间隔 FT,这是因为 PLCP Header指定了物理层协议数据单元 (Physical Protocol Data Unit, 简称: PPDU) 的长度, 同时需要让传统 (legacy) 设备能识别出 CCS , 因此需要 在 CTS帧和序列帧之间设置固定时间间隔以满足上述两个要求。图 3所示 出的是一种可选的 CCS格式, CTS帧在前序列帧在后; 也可以是图 4所 示的格式, 即序列帧在前 CTS帧在后, 图 4为本发明数据传输方法一实施 例的 CCS信令结构图二。
203、 用户设备在调度时间段的下行时间段接收接入点设备传输的数 据。
其中, 在 202中用户设备向接入点设备发送 CCS后, 接入点设备将 查看该 CCS的 CTS帧中的第二标识, 看该标识是不是该接入点设备自己 的标识; 如果是, 则接入点设备 AP将根据序列帧中的用户设备对应的第 一标识获得与用户设备的调度时间段的下行时间段, 启动数据传输; 如果 CTS帧中的第二标识不是该 AP自己的标识, AP将不会在调度时间段的 下行时间段向所述用户设备传输数据。
例如, 以当前的隐藏节点中的问题为例, 假设 API向 STA传输数据, AP2此时也想要向 STA传输数据, 则 AP2向 STA发送了下行调度信息, 用于指示 STA要进行下行传输。 此时, STA作为本次下行传输的接收端 设备, 将检测 STA的信道是否可用; 但是 STA会发现其信道不可用, 因 为正在与 API通信, 所以 STA将不会再获得用于 AP2下行传输的调度时 间段, 也不会向 AP2发送 CCS。 对于 AP2而言, 其没有接收到 STA返回 的 CCS , 也将不会再向 STA传输数据, 从而避免了隐藏节点问题的发生, AP2不会干扰 API与 STA之间的数据传输。
此外, 如果 STA发送的 CCS被某个 AP接收, 但是该 AP发现 CCS 的 CTS帧中的 RA不是用于标识该设备的信息, 则表示该 CCS不是发送 给该设备的, 则该 AP将按照 CTS帧中的 Duration, 在 Duration对应的时 间内不再发送数据。
进一步的, 当调度时间段是调度时间段的下行时间段, 所述接收端设 备是 STA, 所述发送端设备是 AP时, STA在侦听该 STA的信道是否可 用之前, 将接收 AP发送的下行调度信息、 以及用于标识该 STA的序列的 指示信息。 STA将根据所述下行调度信息确定该 STA自身是否被 AP下行 调度; 如果是, 则 STA侦听 STA的信道, 并在信道可用时, 向 AP发送 CCS , 在该 CCS中携带 AP分配的 STA的序列作为所述第一标识。
可选的, 所述用户设备的序列的指示信息是所述用户设备在与接入点 设备关联的过程中接收, 所述用户设备的序列是所述接入点设备分配的与 所述用户设备对应的序列。
可选的, 所述用户设备的序列的指示信息还可以是所述用户设备在与 接入点设备关联之后, 接收所述接入点设备发送的序列指示更新消息, 所 述序列指示更新消息包含所述用户设备的序列的指示信息。
本实施例的数据传输方法, 通过由数据传输的接收端设备自己在传输 前侦听该接收端设备的信道, 在其信道可用时才通过发送信道清空信令指 示发送端设备开始传输数据, 就可以避免传输冲突的情况, 保证数据传输 的正常进行。
实施例二
图 5为本发明数据传输方法另一实施例的流程示意图, 该方法可以用 于接入点设备通过调度时间段的下行时间段向用户设备传输数据, 该方法 可以是数据传输的接入点设备执行, 其中, 该方法简单描述, 具体步骤可 以详见实施例一所述。 如图 5所示, 该方法可以包括:
501、 接入点设备接收所述用户设备发送的信道清空信令, 所述信道 清空信令包括用于标识所述用户设备的第一标识以及用于指示接入点设 备的第二标识;
其中, 所述信道清空信令是所述用户设备在侦听用户设备的信道可用 时发送的。 此外, 所述的第二标识所指示的接入点设备, 意思是用户设备 的信道已经确定要用于用户设备与该第二标识指示的接入点设备之间进 行的数据传输, 只有该第二标识指示的接入点设备可以在接下来的步骤中 开始获得调度时间段与用户设备之间传输数据, 而非第二标识指示的接入 点设备则不能再向用户设备传输数据了。
502、 接入点设备在确定所述第二标识是所述接入点设备对应的标识 时, 通过所述调度时间段的下行时间段向所述第一标识对应的用户设备传 输数据。
其中, 接入点设备在接收到 CCS后, 将判断该 CCS中的 RA对应的 第二标识是否是其自身对应的标识, 或者说 RA中是否包含其自身的 AP 信息; 如果是, 则可以确定该 CCS是 STA发送给自己的, AP将通过调度 时间段的下行时间段向 STA传输数据。
进一步的, 在所述接入点设备接收所述用户设备发送的信道清空信令 之前, 还包括: 接入点设备向所述用户设备发送下行调度信息、 以及用于 标识所述用户设备的序列的指示信息, 以使得所述用户设备根据所述指示 信息在所述信道清空信令携带所述指示信息对应的用户设备序列作为所 述第一标识; 即将所述用户设备序列设置在 CCS中的 sequence的位置。
可选的, 所述的下行调度信息, 可以是接入点设备在下行周期竞争发 送。
可选的,接入点设备也可以不通过竞争,而是将所述的下行调度信息, 在所述下行周期内的调度时间段的下行时间段之后发送; 或者, 将所述下 行调度信息在所述下行周期内向所述用户设备发送信道清空信令之后发 送。
其中, 所述的下行周期可以参见后续实施例的图 8所示。
本实施例的数据传输方法, 通过由数据传输的接收端设备自己在传输 前侦听接收端设备的信道, 在其信道可用时才通过发送信道清空信令指示 发送端设备开始传输数据, 就可以避免传输冲突的情况, 保证数据传输的 正常进行。
实施例三
图 6为本发明数据传输方法又一实施例的流程示意图, 该方法可以用 于用户设备通过调度时间段的上行时间段向接入点设备传输数据, 该方法 可以是数据传输的接入点设备执行, 如图 6所示, 该方法可以包括:
601、 接入点设备在获得所述调度时间段的上行时间段之前, 侦听接 入点设备为关联用户设备分配的信道是否被占用;
其中, 当接收端设备是 AP, 发送端设备是 STA, 需要获得 STA向 AP传输的调度时间段的上行时间段时,将由作为接收端的 AP侦听其接收 端的信道是否可用。 进一步的, 在接入点设备向所述用户设备发送信道清 空信令之前或之后, 还可以包括: 所述接入点设备向所述用户设备发送上 行调度信息, 所述上行调度信息用于调度所述用户设备上行传输。
可选的, 所述的上行调度信息, 可以是接入点设备在下行周期竞争发 送。
可选的,接入点设备也可以不通过竞争,而是将所述的上行调度信息, 在所述下行周期内的调度时间段的下行时间段之后发送; 或者, 将所述下 行调度信息在所述下行周期内向所述用户设备发送信道清空信令之后发 送。
602、 若所述信道未被占用, 则所述接入点设备向所述用户设备发送 信道清空信令, 所述信道清空信令包括用于标识所述接入点设备的第三标 识以及用于标识所述用户设备所在网络的第四标识;
其中, 所述的信道未被占用可以是该 AP与其将要调度上行传输的 STA之间的信道是可用的, 即该 AP没有与其他 STA正在进行数据传输。 所述的信道清空信令 CCS用于使得所述用户设备在确定所述第四标识对 应的网络是用户设备自身所在网络并且所述第三标识对应的接入点设备 是用户设备的关联接入点设备时获得用于数据传输的调度时间段的上行 时间段。
此外, 所述的用户设备所在网络的意思是, 假设由三个 AP组成了某 网络 W, 而用户设备 STA是通过这三个 AP中的某个 AP接入网络 W的, 则该网络 W是 STA的所在网络。
进一步的, 所述接入点设备向用户设备发送信道清空信令, 包括: 所 述接入点设备向用户设备发送信道清空信令, 并在所述信道清空信令中携 带用于标识所述接入点设备的接入点序列作为所述第三标识。
此外, 接入点设备发送的 CCS中, 当 CCS被广播至多个 STA所在的 网络时, 在 RA的位置可以设置表示接收该 CCS的 STA所在的网络 ID; 该 CCS中还携带用于发送该 CCS的 AP的标识,例如是用于标识 AP信息 的序列。
603、 接入点设备在所述调度时间段的上行时间段接收所述用户设备 传输的数据。
例如, 以当前的暴露节点中的问题为例, 当 STA1向 API执行上行数 据传输时, API会向 STA1发送上行调度信息指示 STA1上行, 并且 API 作为接收端设备将检测该接收端设备的信道是否可用, 如果可用, 则 API 会向 STA1发送 CCS。 STA1接收到该 CCS后, 如果该 CCS中的 CTS帧 中的标识 RA是 STA1的标识, 则 STA1将启动调度时间段的上行时间段 的获得和上行数据的传输。 这种情况下, 作为数据发送端设备的 STA1没 有发送 NAV, 从而也不会由于该 NAV对 STA2造成干扰, 避免了暴露节 点的问题。
本实施例的数据传输方法, 通过由数据传输的接收端设备自己在传输 前侦听该接收端设备的信道, 在其信道可用时才通过发送信道清空信令指 示发送端设备开始传输数据, 就可以避免传输冲突的情况, 保证数据传输 的正常进行。
实施例四
图 7为本发明数据传输方法又一实施例的流程示意图, 该方法可以用 于用户设备通过调度时间段的上行时间段向接入点设备传输数据, 该方法 可以是数据传输的用户点设备执行, 如图 7所示, 该方法可以包括:
701、 用户设备接收所述接入点设备发送的信道清空信令, 所述信道 清空信令包括用于标识所述接入点设备的第三标识以及用于标识所述用 户设备所在网络的第四标识;
其中, 所述信道清空信令是所述接入点设备在侦听接入点设备端信道 可用时发送的, 即是在接入点设备在侦听接入点设备为关联用户设备分配 的信道未被占用时发送的。
702、用户设备在确定所述第四标识对应的网络是用户设备所在网络, 并且所述第三标识对应的接入点设备是用户设备的关联接入点设备时, 获 得调度时间段的上行时间段并通过所述调度时间段的上行时间段向所述 第三标识对应的所述接入点设备传输数据。
可选的, 所述第三标识是所述接入点设备的序列的指示信息, 用户设 备可以据此得到接入点设备的序列, 并判断接入点设备是否是关联接入点 设备。 用户设备可以是在与所述接入点设备关联的过程中, 接收所述接入 点设备发送的接入点设备的序列的指示信息; 或者, 也可以是在与所述接 入点设备关联之后, 接收所述接入点设备发送的序列指示更新消息, 所述 序列指示更新消息包含所述接入点设备的序列的指示信息。
进一步的, 在所述用户设备接收所述接入点设备发送的信道清空信令 之前或之后, 还包括: 所述用户设备接收所述接入点设备发送的上行调度 信息, 并根据所述上行调度信息确定所述用户设备被所述接入点设备调度 上行传输。
本实施例的数据传输方法, 通过由数据传输的接收端设备自己在传输 前侦听接收端设备的信道, 在其信道可用时才通过发送信道清空信令指示 发送端设备开始传输数据, 就可以避免传输冲突的情况, 保证数据传输的 正常进行。
下面将通过两个实施例分别对上行数据传输和下行数据传输的过程 进行具体描述。
实施例五
图 8为本发明数据传输方法又一实施例的传输结构示意图一, 如图 8 所示, L1对应的行是总的传输结构, 在 L1行的传输时间内, 被分成了多 个阶段, 每一个阶段称为一个下行 /上行传输回合 (DL/UL roimd) , 图 8 中示出了几个依次连续的 DL/UL round (n-1 ) 、 DL/UL round (n) 以及 DL/UL round (n+1 ) 。 其中, 在每一个下行 /上行传输回合中, 包括了调 度时间段的上行时间段(Uplink Scheduling Phase, 简称: UL SP) 的时间, 用于 STA向 AP传输上行数据, 还包括了调度时间段的下行时间段
(Downlink Scheduling Phase, 简称: DL SP) 的时间, 用于 AP向 STA传 输下行数据。而在调度时间段的上行时间段和调度时间段的下行时间段之 前, 都会有 CCS的发送来指示是否获得该调度时间段。 L1行可以被拆分 成 L2行和 L3行, 即 L1行是由 AP的传输结构与 STA的传输结构叠加而 成。
图 9为本发明数据传输方法又一实施例的信令示意图, 该图 9描述调 度时间段的下行时间段的获得过程; 如图 9所示, 该方法可以包括: 901、 AP向 STA发送下行调度信息及用于标识 STA的序列的指示信 息;
其中, 所述的下行调度信息用于 STA据此判断是否被 AP调度; 所述 的用于标识 STA的序列的指示信息, 是 AP为 STA分配的, STA可以据 此得到包含该 STA信息的序列 sequence。 AP可以为不同的 STA分配不同 的序列 sequence。可选的, AP可以发送多个 STA的序列指示信息,各 STA 分别查找其自身对应的指示信息即可。
902、 STA根据下行调度信息判断是否被 AP调度;
其中, 如果 STA根据下行调度信息判断自己并未被 AP调度, 则结束 本次流程即可, 不再获得后续的调度时间段; 否贝 I」, 如果自己被 AP调度, 则继续执行 903。
903、 STA侦听该 STA的信道是否可用;
其中, 如果信道不可用, 则 STA结束本次流程即可, 不再获得后续 的调度时间段; 否则, 继续执行 904。
904、 STA向 AP发送 CCS , 该 CCS中包含 AP信息的序列以及 STA 信息的序列;
其中, 所述的 AP信息的序列可以是在 STA关联到 AP时从 AP获取 的, 所述的 STA信息的序列可以是在 901中从 AP获取的。 结合图 3, 所 述的 AP信息的序列设置在 CCS的 CTS帧的 RA的位置, 而所述的 STA 信息的序列设置在 CCS的序列帧中的 sequence的位置。
结合图 8, 本步骤中 STA向 AP发送 CCS , 可以是图 8中的 L3行中 的 STA在上行下行切换点前发送的 CCS。
905、 AP根据 CCS确定发送该 CCS的 STA,准备该 STA的下行数据; 其中, 对于本次下行传输的发送端设备 AP而言, 其可能在 901中向 多个 STA均发送了下行调度信息以及每个 STA对应的 CCS序列指示,那 么可能其中某些 STA由于侦听信道忙而不会向 AP回复 CCS。 本步骤中, AP将判断是哪些 STA回复了 CCS ,如果回复了该 CCS并且 CCS中的 RA 字段是 AP信息的序列, 则 AP可以确定该 STA处的信道空闲, STA可以 接收该 AP的下行数据, 所以 AP就可以准备该 STA的下行数据。
此外, 如果是其他的 AP也接收到了 STA发送的 CCS , 但发现 CCS 中的 RA字段中不是标识其本身的序列, 则其他 AP也可以确定 STA不准 备接收其他 AP的下行数据, 其他 AP可以按照 CCS中的 CTS帧中的 Duration, 在 Duration指示的时间内不再发送数据。
906、 AP通过调度时间段的下行时间段向 STA传输数据。
其中, 如果结合图 8来看, 将是 L2行的 AP在 DL/UL round n中发送 的 DL SP中传输下行数据。 并且, 参见图 8中所述的 DL SP上方对应的 NAV(DL SP), 在这段窗口时间内, 也不会受到其他 AP的干扰, 因为正如 在 905中所述的, 其他 AP即使接收到 CCS , 也会由于 CTS帧中的 RA不 是自身对应的标识而执行在 Duration时间内不再发送数据。
实施例六
图 10为本发明数据传输方法又一实施例的信令示意图, 该图 10描述 调度时间段的上行时间段的获得过程; 如图 10所示, 该方法可以包括:
1001、 AP向 STA发送上行调度信息;
其中, 所述的上行调度信息用于指示 STA进行上行传输。 比如, 结 合图 8, 可以是图 8中的 L2行的 AP的 DL/UL round n中所发送的调度信 息 Sch Info。
1002、 AP侦听该 AP的信道是否可用;
其中, 如果信道不可用, 则 AP结束本次流程即可, 不再获得后续的 调度时间段; 否则, 继续执行 1003。
1003、 AP向 STA发送 CCS , 该 CCS中包含 AP信息的序列以及 STA 信息的序列;
其中, 结合图 8来看, 可以是图 8中的 L2行的 AP在 DL/UL round n 中的下行上行切换点之前所发送的 CCS。
1004、 STA根据 CCS判断是否包含关联 AP的信息;
其中, STA在关联到 AP时就获取了 AP的 CCS序列信息, 因而可以 在该步骤中判断是否为关联 AP发送的 CCS;具体是根据 CCS中的序列帧 中的 sequence, 判断该 sequence是否是关联 AP的序列信息。
如果不是关联 AP的序列, 则 STA结束本次流程即可, 不再获得后续 的调度时间段; 否则, 继续执行 1005。
1005、 STA通过调度时间段的上行时间段向 AP传输数据。 其中,结合图 8来看,可以是图 8中的 L3行的 STA在 DL/UL round n 中的上行周期 (UL period) 中的调度时间段的上行时间段 (UL SP) 进行 上行传输。
此外, 参见图 8中的 L3行, STA将在下行周期 (DL period) 从 AP 接收到的调度信息 (Sch lnfo ) , 在上行周期中的上行下行切换点后立即 发送, 向其他用户设备进行广播, 即图 8中的 DL/UL round n中的 UL SP 前边发送的 Sch Info。该调度信息的发送可以使得其他 STA得知本次上行 调度将占用多长时间。
可选的, 图 8是一种可选的传输结构, 在具体实施中, 也可以采用其 他结构形式。 例如, 参见图 11, 图 11为本发明数据传输方法又一实施例 的传输结构示意图二, 在调度时间段的上行时间段获得时, AP可以在紧 接着前一个 DL/UL round的 DL SP之后, 将指定时间预留给 CCS发送。 在调度时间段的下行时间段获得时, STA可以紧接着本 DL/ULround的 UL SP之后, 将指定时间预留给 CCS发送。
可选的, 参见图 12, 图 12为本发明数据传输方法又一实施例的传输 结构示意图三, AP可以先发送 CCS再发送调度信息 Sch lnfo, 并且, 无 需竞争, 调度信息 Sch lnfo只需要紧接着 CCS发送即可。
需要说明的是, 比如在图 10所示的流程中, AP先向 STA发送上行 调度信息, 然后侦听 AP信道是否可用, 如果信道不可用, 则 AP结束本 次流程即可, 不再获得后续的调度时间段; 否则, 向 STA发送 CCS; 那 么这个流程中是 AP先发送上行调度信息, 再发送 CCS。 可选的, AP也 可以先侦听信道, 当 AP信道空闲时, 向 STA发送 CCS; 然后在 CCS之 后再向 STA发送上行调度信息。 即 CCS和上行调度信息的先后顺序是可 选的。 此外, 从图 11或图 12也可以看到, CCS或调度信息可以与之前的 调度时间段连续, 而不需要通过竞争来发送调度信息, CCS的发送时间依 然是在指定时间发送的。
实施例七
图 13为本发明用户设备一实施例的结构示意图, 如图 13所示, 所述 用户设备作为下行数据传输的接收端设备时, 该设备可以包括: 第一信道 侦听单元 1301、第一信令发送单元 1302和第一数据接收单元 1303 ;其中, 第一信道侦听单元 1301, 用于在获得调度时间段的下行时间段之前, 侦听用户设备的关联接入点设备分配的信道是否被占用;
第一信令发送单元 1302, 用于在所述信道未被占用时, 向接入点设备 发送信道清空信令, 所述信道清空信令包括用于标识所述用户设备的第一 标识以及用于标识所述接入点设备的第二标识, 以使得所述接入点设备在 确定所述第二标识是所述接入点设备对应的标识后获得用于数据传输的 调度时间段的下行时间段;
第一数据接收单元 1303,用于在所述调度时间段的下行时间段接收所 述接入点设备传输的数据。
图 14为本发明用户设备另一实施例的结构示意图, 在图 13的结构基 础上, 该设备还可以包括信息获取单元 1304;
信息获取单元 1304, 用于在所述第一信道侦听单元 1301侦听信道是 否被占用之前, 接收所述接入点设备发送的下行调度信息、 以及用于标识 所述用户设备序列的指示信息; 并根据所述下行调度信息确定所述用户设 备被所述接入点设备调度下行传输;
所述第一信令发送单元 1302, 在发送所述信道清空信令时, 具体用于 向接入点设备发送信道清空信令, 并根据所述指示信息携带根据所述指示 信息获取的所述用户设备的序列作为所述第一标识。
进一步的, 所述信息获取单元 1304, 在接收所述指示信息时, 具体是 用于在与所述接入点设备关联的过程中接收, 所述用户设备的序列是所述 接入点设备分配的与所述用户设备对应的序列; 或者, 是在与所述接入点 设备关联之后, 接收所述接入点设备发送的序列指示更新消息, 所述序列 指示更新消息包含所述用户设备的序列的指示信息。
实施例八
图 15为本发明接入点设备一实施例的结构示意图, 如图 15所示, 所 述接入点设备作为下行数据传输的发送端设备时, 该设备可以包括: 第一 信令接收单元 1501和第一数据发送单元 1502; 其中,
第一信令接收单元 1501, 用于接收所述用户设备发送的信道清空信 令, 所述信道清空信令包括用于标识所述用户设备的第一标识以及用于指 示接入点设备的第二标识; 所述信道清空信令是所述用户设备在侦听到用 户设备的关联接入点设备分配的信道未被占用时发送的;
第一数据发送单元 1502,用于在确定所述第二标识是所述接入点设备 对应的标识时, 通过所述调度时间段的下行时间段向所述第一标识对应的 用户设备传输数据。
图 16为本发明接入点设备另一实施例的结构示意图, 在图 15的结构 基础上, 该设备还可以包括调度控制单元 1503 ;
调度控制单元 1503,用于在所述第一信令接收单元接收所述用户设备 发送的信道清空信令之前, 向所述用户设备发送下行调度信息、 以及用于 标识所述用户设备的序列的指示信息, 以使得所述用户设备根据所述指示 信息在所述信道清空信令携带所述指示信息对应的用户设备序列作为第 一标识。
进一步的, 所述调度控制单元 1503, 在向所述用户设备发送下行调度 信息时, 具体是用于在下行周期竞争发送所述下行调度信息; 或者, 将所 述下行调度信息在所述下行周期内的调度时间段的下行时间段之后发送; 或者, 将所述下行调度信息在所述下行周期内向所述用户设备发送信道清 空信令之后发送。
实施例九
图 17为本发明接入点设备又一实施例的结构示意图, 如图 17所示, 所述接入点设备作为上行数据传输的接收端设备时, 该设备包括: 第二信 道侦听单元 1701、 第二信令发送单元 1702和第二数据接收单元 1703 ; 其 中,
第二信道侦听单元 1701, 用于在获得调度时间段的上行时间段之前, 侦听所述接入点设备为关联用户设备分配的信道是否被占用;
第二信令发送单元 1702, 用于在所述信道未被占用时, 向所述用户设 备发送信道清空信令, 所述信道清空信令包括用于标识所述接入点设备的 第三标识以及用于标识所述用户设备所在网络的第四标识, 以使得所述用 户设备在确定所述第四标识对应的网络是所述用户设备所在网络并且所 述第三标识对应的接入点设备是所述用户设备的关联接入点设备时获得 用于数据传输的调度时间段的上行时间段;
第二数据接收单元 1703,用于在所述调度时间段的上行时间段接收所 述用户设备传输的数据。
图 18为本发明接入点设备再一实施例的结构示意图, 在图 17所示的 结构基础上, 该设备还可以包括: 信息发送单元 1704;
信息发送单元 1704, 用于在所述第二信令发送单元 1702发送信道清 空信令之前或之后, 向所述用户设备发送上行调度信息, 所述上行调度信 息用于调度所述用户设备上行传输;
所述第二信令发送单元 1702,具体用于在向用户设备发送信道清空信 令时, 在所述信道清空信令中携带用于标识所述接入点设备的接入点序列 作为所述第三标识。
进一步的, 所述信息发送单元 1704, 在所述用户设备发送上行调度信 息时, 具体是用于在下行周期竞争发送所述上行调度信息; 或者, 将所述 上行调度信息在所述下行周期内的调度时间段的下行时间段之后发送; 或 者, 将所述上行调度信息在所述下行周期内向所述用户设备发送信道清空 信令之后发送。
实施例十
图 19为本发明用户设备又一实施例的结构示意图, 如图 19所示, 所 述用户设备作为上行数据传输的发送端设备时, 该设备可以包括: 第二信 令接收单元 1901和第二数据发送单元 1902; 其中,
第二信令接收单元 1901, 用于接收接入点设备发送的信道清空信令, 所述信道清空信令包括用于标识所述接入点设备的第三标识以及用于标 识所述用户设备所在网络的第四标识; 所述信道清空信令是所述接入点设 备在侦听接入点设备为关联用户设备分配的信道未被占用时发送的;
第二数据发送单元 1902,用于在确定所述第四标识对应的网络是所述 用户设备所在网络, 并且所述第三标识对应的接入点设备是所述用户设备 的关联接入点设备时, 获得调度时间段的上行时间段并通过所述调度时间 段的上行时间段向所述第三标识对应的所述接入点设备传输数据。
进一步的, 第二信令接收单元 1901, 还用于在所述用户设备接收所述 接入点设备发送的信道清空信令之前或之后, 接收所述接入点设备发送的 上行调度信息, 并根据所述上行调度信息确定所述用户设备被所述接入点 设备调度上行传输。 进一步的, 第二信令接收单元 1901, 在接收所述接入点设备发送的上 行调度信息时, 具体是用于在与所述接入点设备关联的过程中, 接收所述 接入点设备发送的接入点设备的序列的指示信息; 或者, 在与所述接入点 设备关联之后, 接收所述接入点设备发送的序列指示更新消息, 所述序列 指示更新消息包含所述接入点设备的序列的指示信息。
进一步的, 所述第二数据发送单元 1902, 还用于将所述第二信令接收 单元接收的所述上行调度信息, 在上行周期中的上行下行切换点后向其他 用户设备进行广播。
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

权 利 要 求 书
1、 一种数据传输方法, 其特征在于, 所述方法包括:
用户设备在获得调度时间段的下行时间段之前, 侦听所述用户设备的 关联接入点设备分配的信道是否被占用;
若所述信道未被占用, 则所述用户设备向接入点设备发送信道清空信 令, 所述信道清空信令包括用于标识所述用户设备的第一标识以及用于标 识所述接入点设备的第二标识, 以使得所述接入点设备在确定所述第二标 识是所述接入点设备对应的标识后获得用于数据传输的调度时间段的下 行时间段;
所述用户设备在所述调度时间段的下行时间段接收所述接入点设备 传输的数据。
2、 根据权利要求 1所述的方法, 其特征在于,
在所述侦听所述用户设备的关联接入点设备分配的信道是否被占用 之前, 还包括: 所述用户设备接收所述接入点设备发送的下行调度信息、 以及用于标识所述用户设备的序列的指示信息; 并根据所述下行调度信息 确定所述用户设备被所述接入点设备调度下行传输;
所述第一标识包括所述用户设备根据所述指示信息获取的所述用户 设备的序列。
3、 根据权利要求 2所述的方法, 其特征在于,
所述用户设备的序列的指示信息是所述用户设备在与所述接入点设 备关联的过程中接收, 所述用户设备的序列是所述接入点设备分配的与所 述用户设备对应的序列。
4、 根据权利要求 2所述的方法, 其特征在于,
所述用户设备的序列的指示信息是所述用户设备在与所述接入点设 备关联之后, 接收所述接入点设备发送的序列指示更新消息, 所述序列指 示更新消息包含所述用户设备的序列的指示信息。
5、 根据权利要求 1-4任一所述的方法, 其特征在于,
所述信道清空信令包括允许发送帧和序列帧, 所述允许发送帧中包括 所述第二标识以及网络分配矢量, 所述序列帧中包括所述第一标识。
6、 一种数据传输方法, 其特征在于, 所述方法包括: 接入点设备接收用户设备发送的信道清空信令, 所述信道清空信令包 括用于标识所述用户设备的第一标识以及用于指示接入点设备的第二标 识; 所述信道清空信令是所述用户设备在侦听到所述用户设备的关联接入 点设备分配的信道未被占用时发送的;
所述接入点设备在确定所述第二标识是所述接入点设备对应的标识 时, 通过所述调度时间段的下行时间段向所述第一标识对应的用户设备传 输数据。
7、 根据权利要求 6所述的方法, 其特征在于, 在所述接入点设备接 收所述用户设备发送的信道清空信令之前, 还包括:
所述接入点设备向所述用户设备发送下行调度信息、 以及用于标识所 述用户设备的序列的指示信息, 以使得所述用户设备根据所述指示信息在 所述信道清空信令携带所述指示信息对应的用户设备序列作为所述第一 标识。
8、 根据权利要求 7所述的方法, 其特征在于,
所述接入点设备在下行周期竞争发送所述下行调度信息;
或者, 所述接入点设备将所述下行调度信息在所述下行周期内的调度 时间段的下行时间段之后发送;
或者, 所述接入点设备将所述下行调度信息在所述下行周期内向所述 用户设备发送信道清空信令之后发送。
9、 一种数据传输方法, 其特征在于, 所述方法包括:
接入点设备在获得调度时间段的上行时间段之前, 侦听所述接入点设 备为关联用户设备分配的信道是否被占用;
若所述信道未被占用, 则所述接入点设备向所述用户设备发送信道清 空信令, 所述信道清空信令包括用于标识所述接入点设备的第三标识以及 用于标识所述用户设备所在网络的第四标识, 以使得所述用户设备在确定 所述第四标识对应的网络是用户设备所在网络并且所述第三标识对应的 接入点设备是所述用户设备的关联接入点设备时获得用于数据传输的调 度时间段的上行时间段;
所述接入点设备在所述调度时间段的上行时间段接收所述用户设备 传输的数据。
10、 根据权利要求 9所述的方法, 其特征在于,
在所述接入点设备向所述用户设备发送信道清空信令之前或之后, 还 包括: 所述接入点设备向所述用户设备发送上行调度信息, 所述上行调度 信息用于调度所述用户设备上行传输;
所述接入点设备向用户设备发送信道清空信令, 包括: 所述接入点设 备向用户设备发送信道清空信令, 并在所述信道清空信令中携带用于标识 所述接入点设备的接入点序列作为所述第三标识。
11、 根据权利要求 10所述的方法, 其特征在于,
所述接入点设备在下行周期竞争发送所述上行调度信息;
或者, 所述接入点设备将所述上行调度信息在所述下行周期内的调度 时间段的下行时间段之后发送;
或者, 所述接入点设备将所述上行调度信息在所述下行周期内向所述 用户设备发送信道清空信令之后发送。
12、 根据权利要求 9所述的方法, 其特征在于,
所述信道清空信令包括允许发送帧和序列帧, 所述允许发送帧中包括 所述第三标识以及网络分配矢量, 所述序列帧中包括所述第四标识。
13、 一种数据传输方法, 其特征在于, 所述方法包括:
用户设备接收接入点设备发送的信道清空信令, 所述信道清空信令包 括用于标识所述接入点设备的第三标识以及用于标识所述用户设备所在 网络的第四标识; 所述信道清空信令是所述接入点设备在侦听接入点设备 为关联用户设备分配的信道未被占用时发送的;
所述用户设备在确定所述第四标识对应的网络是所述用户设备所在 网络, 并且所述第三标识对应的接入点设备是所述用户设备的关联接入点 设备时, 获得调度时间段的上行时间段并通过所述调度时间段的上行时间 段向所述第三标识对应的所述接入点设备传输数据。
14、 根据权利要求 13所述的方法, 其特征在于, 所述第三标识是所 述接入点设备的序列的指示信息;
在所述用户设备接收接入点设备发送的信道清空信令之前, 还包括: 所述用户设备在与所述接入点设备关联的过程中, 接收所述接入点设 备发送的接入点设备的序列的指示信息。
15、 根据权利要求 13所述的方法, 其特征在于, 所述第三标识是所 述接入点设备的序列的指示信息;
在所述用户设备接收接入点设备发送的信道清空信令之前, 还包括: 所述用户设备在与所述接入点设备关联之后, 接收所述接入点设备发 送的序列指示更新消息, 所述序列指示更新消息包含所述接入点设备的序 列的指示信息。
16、 根据权利要求 13所述的方法, 其特征在于, 在所述用户设备接 收所述接入点设备发送的信道清空信令之前或之后, 还包括:
所述用户设备接收所述接入点设备发送的上行调度信息, 并根据所述 上行调度信息确定所述用户设备被所述接入点设备调度上行传输。
17、 根据权利要求 16所述的方法, 其特征在于,
所述用户设备将所述上行调度信息, 在上行周期中的上行下行切换点 后向其他用户设备进行广播。
18、 一种用户设备, 其特征在于, 包括:
第一信道侦听单元, 用于在获得所述调度时间段的下行时间段之前, 侦听用户设备的关联接入点设备分配的信道是否被占用;
第一信令发送单元, 用于在所述信道未被占用时, 向接入点设备发送 信道清空信令, 所述信道清空信令包括用于标识所述用户设备的第一标识 以及用于标识所述接入点设备的第二标识, 以使得所述接入点设备在确定 所述第二标识是所述接入点设备对应的标识后获得用于数据传输的调度 时间段的下行时间段;
第一数据接收单元, 用于在所述调度时间段的下行时间段接收所述接 入点设备传输的数据。
19、 根据权利要求 18所述的设备, 其特征在于, 还包括:
信息获取单元, 用于在所述第一信道侦听单元侦听信道是否被占用之 前, 接收所述接入点设备发送的下行调度信息、 以及用于标识所述用户设 备序列的指示信息; 并根据所述下行调度信息确定所述用户设备被所述接 入点设备调度下行传输;
所述第一信令发送单元, 在发送所述信道清空信令时, 具体用于向接 入点设备发送信道清空信令, 并根据所述指示信息携带根据所述指示信息 获取的所述用户设备的序列作为所述第一标识。
20、 根据权利要求 19所述的设备, 其特征在于,
所述信息获取单元, 在接收所述指示信息时, 具体是用于在与所述接 入点设备关联的过程中接收, 所述用户设备的序列是所述接入点设备分配 的与所述用户设备对应的序列; 或者, 是在与所述接入点设备关联之后, 接收所述接入点设备发送的序列指示更新消息, 所述序列指示更新消息包 含所述用户设备的序列的指示信息。
21、 一种接入点设备, 其特征在于, 包括:
第一信令接收单元, 用于接收所述用户设备发送的信道清空信令, 所 述信道清空信令包括用于标识所述用户设备的第一标识以及用于指示接 入点设备的第二标识; 所述信道清空信令是所述用户设备在侦听到用户设 备的关联接入点设备分配的信道未被占用时发送的;
第一数据发送单元, 用于在确定所述第二标识是所述接入点设备对应 的标识时, 通过所述调度时间段的下行时间段向所述第一标识对应的用户 设备传输数据。
22、 根据权利要求 21所述的设备, 其特征在于, 还包括:
调度控制单元, 用于在所述第一信令接收单元接收所述用户设备发送 的信道清空信令之前, 向所述用户设备发送下行调度信息、 以及用于标识 所述用户设备的序列的指示信息, 以使得所述用户设备根据所述指示信息 在所述信道清空信令携带所述指示信息对应的用户设备序列作为第一标 识。
23、 根据权利要求 22所述的设备, 其特征在于,
所述调度控制单元, 在向所述用户设备发送下行调度信息时, 具体是 用于在下行周期竞争发送所述下行调度信息; 或者, 将所述下行调度信息 在所述下行周期内的调度时间段的下行时间段之后发送; 或者, 将所述下 行调度信息在所述下行周期内向所述用户设备发送信道清空信令之后发 送。
24、 一种接入点设备, 其特征在于, 包括:
第二信道侦听单元, 用于在获得调度时间段的上行时间段之前, 侦听 所述接入点设备为关联用户设备分配的信道是否被占用; 第二信令发送单元, 用于在所述信道未被占用时, 向所述用户设备发 送信道清空信令, 所述信道清空信令包括用于标识所述接入点设备的第三 标识以及用于标识所述用户设备所在网络的第四标识, 以使得所述用户设 备在确定所述第四标识对应的网络是所述用户设备所在网络并且所述第 三标识对应的接入点设备是所述用户设备的关联接入点设备时获得用于 数据传输的调度时间段的上行时间段;
第二数据接收单元, 用于在所述调度时间段的上行时间段接收所述用 户设备传输的数据。
25、 根据权利要求 24所述的设备, 其特征在于, 还包括:
信息发送单元, 用于在所述第二信令发送单元发送信道清空信令之前 或之后, 向所述用户设备发送上行调度信息, 所述上行调度信息用于调度 所述用户设备上行传输;
所述第二信令发送单元, 具体用于在向用户设备发送信道清空信令 时, 在所述信道清空信令中携带用于标识所述接入点设备的接入点序列作 为所述第三标识。
26、 根据权利要求 25所述的设备, 其特征在于,
所述信息发送单元, 在所述用户设备发送上行调度信息时, 具体是用 于在下行周期竞争发送所述上行调度信息; 或者, 将所述上行调度信息在 所述下行周期内的调度时间段的下行时间段之后发送; 或者, 将所述上行 调度信息在所述下行周期内向所述用户设备发送信道清空信令之后发送。
27、 一种用户设备, 其特征在于, 包括:
第二信令接收单元, 用于接收接入点设备发送的信道清空信令, 所述 信道清空信令包括用于标识所述接入点设备的第三标识以及用于标识所 述用户设备所在网络的第四标识; 所述信道清空信令是所述接入点设备在 侦听接入点设备为关联用户设备分配的信道未被占用时发送的;
第二数据发送单元, 用于在确定所述第四标识对应的网络是所述用户 设备所在网络, 并且所述第三标识对应的接入点设备是所述用户设备的关 联接入点设备时, 获得调度时间段的上行时间段并通过所述调度时间段的 上行时间段向所述第三标识对应的所述接入点设备传输数据。
28、 根据权利要求 27所述的用户设备, 其特征在于, 所述第二信令接收单元, 还用于在所述用户设备接收所述接入点设备 发送的信道清空信令之前或之后, 接收所述接入点设备发送的上行调度信 息, 并根据所述上行调度信息确定所述用户设备被所述接入点设备上行调 度。
29、 根据权利要求 28所述的设备, 其特征在于,
所述第二信令接收单元, 在接收所述接入点设备发送的上行调度信息 时, 具体是用于在与所述接入点设备关联的过程中, 接收所述接入点设备 发送的接入点设备的序列的指示信息; 或者, 在与所述接入点设备关联之 后, 接收所述接入点设备发送的序列指示更新消息, 所述序列指示更新消 息包含所述接入点设备的序列的指示信息。
30、 根据权利要求 28所述的设备, 其特征在于,
所述第二数据发送单元, 还用于将所述第二信令接收单元接收的所述上行 调度信息, 在上行周期中的上行下行切换点后向其他用户设备进行广播。
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