WO2017133314A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2017133314A1
WO2017133314A1 PCT/CN2016/108890 CN2016108890W WO2017133314A1 WO 2017133314 A1 WO2017133314 A1 WO 2017133314A1 CN 2016108890 W CN2016108890 W CN 2016108890W WO 2017133314 A1 WO2017133314 A1 WO 2017133314A1
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WIPO (PCT)
Prior art keywords
channel reservation
station
threshold
parameter set
frame
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PCT/CN2016/108890
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English (en)
Chinese (zh)
Inventor
李楠
吕开颖
邢卫民
韩志强
孙波
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中兴通讯股份有限公司
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Publication of WO2017133314A1 publication Critical patent/WO2017133314A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the embodiments of the present invention relate to the field of data communications, and in particular, to a data transmission method and apparatus.
  • WLAN network load is increasing.
  • APs access points
  • non-AP STAs non-AP stations
  • basic service set OBSS
  • Site A sends data to Site B, and Site C also sends data to Site B. Since both C and A are outside the coverage of each other, simultaneous transmission of A and C will cause a collision, causing B to fail to receive data correctly.
  • a and C are hidden sites.
  • FIG. 1B is a schematic diagram of RTS and CTS frame exchange.
  • the specific method of channel reservation is: the sender sends an RTS frame, which includes a time domain (channel reservation time), indicating the length of time required for the sender to complete the frame exchange.
  • the receiver responds to the CTS frame, which also contains a time domain to ensure that the sender can complete the frame exchange.
  • NAV Network Allocation Vector
  • RTS and CTS have shorter frame lengths, so the station can send the data frame before sending the data frame.
  • RTS if the CTS is successfully received, indicates that the channel is in good condition and the channel is reserved, and the data continues to be transmitted. If the RTS is not successfully received, it indicates that a collision occurs or the channel status is not good.
  • the use of RTS/CTS for channel sounding has low overhead and fast response, avoiding the waste of channel resources caused by collisions directly transmitting long data frames.
  • RTS is not sent before any data is transmitted, but the station sets an RTS threshold.
  • the RTS/CTS handshake is performed before the data frame is transmitted.
  • the RTS threshold is set by the site.
  • some schemes are proposed to be controlled by the AP. Whether RTS is enabled for all associated sites. If the AP command is enabled, all associated sites must send RTS before sending data frames.
  • the disadvantage of this solution is that the flexibility is not high, and for the scenario where the short frame is sent by the station, forcibly turning on the RTS will cause a certain overhead, and the channel transmission efficiency is lowered.
  • the embodiment of the present invention provides a data transmission apparatus method and apparatus, which can improve the reliability of data transmission between mobile terminals.
  • an embodiment of the present invention provides a data transmission method, where the method includes:
  • the first station sends a threshold parameter set to the second station, where the threshold parameter set carries information about notifying the second station to send a channel reservation request frame;
  • the first station receives a channel reservation request frame sent by the second station;
  • the first station receives the data frame sent by the second station.
  • the threshold parameter set includes any one of the following information:
  • Channel reservation indication information wherein the channel reservation indication information is used to indicate whether the second station sends the channel reservation request frame
  • the threshold parameter set includes at least one of the following:
  • the area information includes at least one of the following information:
  • the wireless signal measurement parameter includes at least one of the following data:
  • the second station receives the received power when the first station sends a signal
  • the received signal strength of the second station indicates RSSI
  • the packet error rate of the second station during the predetermined time period is the packet error rate of the second station during the predetermined time period.
  • the threshold parameter set further includes:
  • the effective time length is used to notify the second station that the channel reservation needs to be performed before the data frame is transmitted within the valid time length.
  • the unit of the threshold is a byte or a length of transmission time.
  • the first site is an access point, or is a site that performs direct communication with the second site.
  • an embodiment of the present invention further provides a data transmission method, where the method includes:
  • the second station receives the threshold parameter set sent by the first station
  • the channel reservation request frame is sent according to the information carried in the threshold parameter set
  • the data frame After receiving the response frame corresponding to the channel reservation request frame, the data frame is transmitted.
  • the data transmission method further includes: before the sending the channel reservation request frame according to the information carried by the threshold parameter set, the data transmission method further includes:
  • the step of transmitting the channel reservation request frame is performed; when the data frame length is less than the threshold value, performing the step of transmitting the data frame ;
  • the step of transmitting the data frame is performed when it is confirmed that the channel reservation is not required to be performed.
  • the determining, according to the information carried in the threshold parameter set, whether the channel reservation needs to be performed is performed according to any one of the following manners:
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, it is confirmed that the channel reservation needs to be performed; and the channel reservation indication information indicates that the second station does not send the channel reservation request frame. When it is confirmed that it is not necessary to perform channel reservation;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the area information of the second station belongs to the first area information set, it is confirmed that the channel reservation needs to be performed; otherwise, it is confirmed as not Need to perform channel reservation;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the QoS level of the data frame to be transmitted belongs to the first QoS level set, it is confirmed that the channel reservation needs to be performed; otherwise, the confirmation is performed. It is not necessary to perform channel reservation.
  • the data transmission method before the sending a channel reservation request frame, the data transmission method further includes:
  • the second station acquires a threshold corresponding to the second station according to the threshold parameter set.
  • the threshold parameter set includes: a threshold value when the second station sends a channel reservation request frame to the first station;
  • Obtaining a threshold corresponding to the second site according to the threshold parameter set includes:
  • the threshold value in the threshold parameter set is read, and the read threshold is used as the threshold of the second station.
  • the threshold parameter set includes a correspondence between the area information and the threshold value
  • the area information includes at least one of the following information:
  • the obtaining the threshold value corresponding to the second station according to the threshold parameter set includes:
  • the acquiring the threshold value corresponding to the second site according to the threshold parameter set includes:
  • the acquiring the threshold value corresponding to the second station according to the threshold parameter set includes:
  • Measurement parameters, sector, and wireless signals according to sectors and wireless signals corresponding to the second station The corresponding relationship between the measurement parameter and the threshold value is obtained, and the threshold value corresponding to the second site is obtained.
  • the threshold parameter set includes a correspondence between a QoS level and a threshold value
  • the acquiring the threshold corresponding to the second site according to the threshold parameter set includes:
  • the threshold value corresponding to the second station is obtained according to the QoS level corresponding to the second station and the correspondence between the QoS level and the threshold.
  • the wireless signal measurement parameter includes at least one of the following data:
  • the second station receives the received power when the first station sends a signal
  • the packet error rate of the second station during the predetermined time period is the packet error rate of the second station during the predetermined time period.
  • the threshold parameter set further includes an effective time length; wherein, for the effective time length, the second station starts timing from the radio frame receiving end time that carries the threshold parameter set;
  • the second station performs channel reservation before transmitting the data frame according to the information carried by the threshold parameter set.
  • the second site is a site associated with the first site, or the second site is a site that performs direct communication with the first site.
  • the embodiment of the present invention further provides a data transmission device, which is disposed on an access point site AP, and the device includes:
  • a threshold parameter set sending unit configured to send a threshold parameter set, where the threshold parameter set carries information about notifying the second station to send a channel reservation request frame;
  • a receiving unit configured to receive a channel reservation request frame sent by the second station
  • a response frame sending unit configured to send a response frame corresponding to the channel reservation request frame
  • the receiving unit is further configured to receive a data frame sent by the second station.
  • the threshold parameter set sent by the threshold parameter set sending unit includes any one of the following information:
  • Channel reservation indication information wherein the channel reservation indication information is used to indicate whether the second station sends the channel reservation request frame
  • the threshold parameter set sent by the threshold parameter set sending unit includes at least one of the following:
  • the area information includes at least one of the following information:
  • the threshold parameter set sent by the threshold parameter set sending unit further includes:
  • the effective time length is used to notify the second station that the channel reservation needs to be performed before the data frame is transmitted within the valid time length.
  • the wireless signal measurement parameter includes at least one of the following data:
  • the second station receives the received power when the first station sends a signal
  • the received signal strength of the second station indicates RSSI
  • the packet error rate of the second station during the predetermined time period is the packet error rate of the second station during the predetermined time period.
  • an embodiment of the present invention further provides a data transmission apparatus, which is configured.
  • the device includes:
  • a threshold parameter set receiving unit configured to receive a threshold parameter set sent by the first station
  • a channel reservation unit configured to send a channel reservation request frame according to information carried in the threshold parameter set when the data frame needs to be sent;
  • the data frame transmitting unit is configured to transmit the data frame after receiving the response frame corresponding to the channel reservation request frame.
  • the channel reservation unit includes a threshold value determination module, a reservation request frame transmission module, and a response frame receiving module;
  • the threshold value determining module is configured to determine whether a length of the data frame is greater than a threshold value
  • the reservation request frame sending module is configured to send a channel reservation request frame when the length of the data frame is greater than a threshold
  • the response frame receiving module is configured to receive a response frame corresponding to the channel reservation request frame sent by the first station;
  • the data transmission device further includes:
  • the channel reservation confirming unit is configured to confirm whether the channel reservation needs to be performed according to the information carried in the threshold parameter set, and notify the channel reservation unit to perform the channel reservation when confirming that the channel reservation needs to be performed;
  • the notification data frame transmitting unit transmits the data frame.
  • the channel reservation confirming unit includes at least one of the following modules:
  • a first confirmation module configured to confirm, according to the channel reservation indication information carried in the threshold parameter set, whether the channel reservation needs to be performed; wherein the channel reservation indication information is used to indicate whether the second station sends the channel reservation request frame;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, it is confirmed that the channel reservation needs to be performed; and the channel reservation indication information indicates that the second station does not send the channel reservation request frame. When it is confirmed that it is not necessary to perform channel reservation;
  • a second confirmation module configured to receive channel reservation indication information and a number according to the threshold parameter set
  • a regional information set confirms whether a channel reservation needs to be performed
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the area information of the second station belongs to the first area information set, it is confirmed that the channel reservation needs to be performed; otherwise, it is confirmed as not Need to perform channel reservation;
  • a third confirmation module configured to confirm, according to the channel reservation indication information carried by the threshold parameter set and the first QoS level set, whether to perform channel reservation;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the QoS level of the data frame to be transmitted belongs to the first QoS level set, it is confirmed that the channel reservation needs to be performed; otherwise, the confirmation is performed. It is not necessary to perform channel reservation.
  • the channel reservation unit further includes:
  • the threshold obtaining module is configured to obtain a threshold corresponding to the second station according to the threshold parameter set.
  • the threshold parameter set includes: a threshold value when the second station sends a channel reservation request frame to the first station;
  • the threshold acquisition module includes:
  • the first threshold acquisition submodule is configured to read the threshold value in the threshold parameter set, and use the read threshold as the threshold of the second station.
  • the threshold parameter set includes a correspondence between the area information and the threshold value
  • the threshold acquisition module includes:
  • a second threshold acquisition sub-module configured to acquire a threshold value of the second station according to the correspondence between the area information of the threshold parameter set and the threshold value, and the area information of the second station;
  • the area information includes at least one of the following information:
  • the second threshold value is acquired
  • the sub-module is configured to acquire a threshold corresponding to the second station according to the sector to which the second station belongs and the correspondence between each sector and the threshold;
  • the second threshold value acquisition sub-module is set to correspond to the wireless signal measurement parameter corresponding to the second station, and the correspondence between the wireless signal measurement parameter and the threshold value, Obtain a threshold corresponding to the second site;
  • the second threshold value acquisition submodule is set to measure the parameter and the sector according to the sector and the wireless signal corresponding to the second station. Corresponding relationship between the wireless signal measurement parameter and the threshold value, and acquiring the threshold value corresponding to the second site.
  • the threshold parameter set includes a correspondence between a QoS level and a threshold value
  • the threshold acquisition module includes:
  • the third threshold acquisition sub-module is configured to obtain a threshold corresponding to the second station according to the QoS level corresponding to the second station and the correspondence between the QoS level and the threshold.
  • the wireless signal measurement parameter includes at least one of the following data:
  • the second station receives the received power when the first station sends a signal
  • the packet error rate of the second station during the predetermined time period is the packet error rate of the second station during the predetermined time period.
  • the threshold parameter set further includes an effective time length; wherein
  • the channel reservation unit further includes a timing module configured to start timing from the radio frame reception end time carrying the threshold parameter set for the effective time length; so that the channel reservation unit is within the valid time length, according to The information carried by the threshold parameter set performs channel reservation before transmitting the data frame.
  • a computer storage medium is further provided, where the computer storage medium may store an execution instruction for executing the data transmission side in the foregoing embodiment. law.
  • the technical solution provided by the embodiment of the present invention includes: the first station sends a threshold parameter set to the second station, where the threshold parameter set carries information about notifying the second station to send a channel reservation request frame; The first station receives the channel reservation request frame sent by the second station; the first station sends a response frame corresponding to the channel reservation request frame to the second station; and the first station receives the data frame sent by the second station.
  • the first station can flexibly control whether the site turns on the RTS protection according to the channel busyness and channel quality, and flexibly sets the RTS threshold size, and can effectively avoid collision under the premise of ensuring certain communication efficiency.
  • Figure 1A is a schematic diagram of a hidden site
  • FIG. 1B is a schematic diagram of RTS and CTS frame exchange
  • FIG. 2 is a flowchart of a data transmission method according to an embodiment of the present invention.
  • 3A, 3B, 3C, and 3D are schematic diagrams of obtaining threshold values according to an embodiment of the present invention.
  • FIG. 4 and FIG. 5 are respectively a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention.
  • the present invention provides a data transmission method, and the method includes:
  • Step 110 The first station sends a threshold parameter set to the second station.
  • Step 120 The second station acquires a threshold corresponding to the second station according to the threshold parameter set.
  • Step 140 The second station performs a channel reservation when it needs to send a data frame.
  • Step 140 specifically includes:
  • Step 141 When the second station needs to send the data frame to the first station, determine whether the length of the data frame is greater than a threshold corresponding to the second station; if yes, go to step 142; otherwise, go to step 150.
  • Step 142 When the length of the data frame is greater than the threshold, send a channel reservation request frame,
  • Step 143 The second station receives the acknowledgement frame corresponding to the channel reservation request frame.
  • the acknowledgement frame corresponding to the channel reservation request frame of the first station reply is received, indicating that the channel reservation is successful.
  • Step 150 The second station sends a data frame to the first station.
  • the method further includes:
  • Step 130 Confirm, according to information carried in the threshold parameter set, whether a channel reservation needs to be performed;
  • step 140 is performed; when the data frame length is less than the threshold value, the step of transmitting the data frame is performed;
  • step 150 is performed.
  • step 130 is performed according to any one of the following ways:
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, it is confirmed that the channel reservation needs to be performed; and the channel reservation indication information indicates that the second station does not send the channel reservation request frame. When it is confirmed that it is not necessary to perform channel reservation;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the area information of the second station belongs to the first area information set, it is confirmed that the channel reservation needs to be performed; otherwise, it is confirmed as not Need to perform channel reservation;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the QoS level of the data frame to be transmitted belongs to the first QoS level set, it is confirmed that the channel reservation needs to be performed; otherwise, the confirmation is performed. It is not necessary to perform channel reservation.
  • the first station may send the threshold parameter set to the second site by using unicast, multicast, or broadcast. Specifically, the sending may be periodic, or event-triggered, or based on the request of the second site. .
  • the second station After receiving the threshold parameter set sent by the first station, the second station confirms whether the channel reservation needs to be performed according to the information carried in the threshold parameter set, and determines the size of the threshold, and does not need to send the data frame each time. It is necessary to re-confirm whether the channel reservation needs to be performed, and it is not necessary to re-determine the size of the threshold. If the channel reservation needs to be performed, it is only necessary to determine whether the length of the data frame is greater than the threshold according to the threshold value.
  • the second site receives the threshold parameter set, due to changes in its geographical location, or The change of the wireless environment around the user periodically or irregularly confirms whether it needs to perform channel reservation and confirm the size of the threshold according to the information carried in the threshold parameter set.
  • the second site can do this at idle times when it is not transmitting or receiving, or before each data frame is sent.
  • the first site is an AP
  • the second site is a non-access site non-AP STA (referred to as STA) associated with the AP.
  • STA non-access site non-AP STA
  • the AP sends a threshold parameter set to the STA associated with itself in the system message Beacon frame sent by itself or in the Probe Response frame.
  • the threshold parameter set includes the correspondence between the area information and the threshold value.
  • the unit of the threshold value may be expressed by a byte or by a length of the transmission time.
  • the AP sets the correspondence between the area information and the threshold.
  • the area information refers to the sector to which the STA belongs. As shown in Figure 3A. How to divide a sector belongs to the related art. Generally, for a BSS, an AP may perform sector division on a BSS according to the coverage of a directional antenna, and the STA associated with the AP belongs to a certain sector. Alternatively, the AP divides the entire BSS into a number of sectors according to the geographical distribution of the stations of the STAs associated therewith.
  • the threshold values of the transmitted RTS frames set for each sector may be the same or different.
  • the sector information to which the STA belongs is notified in advance by the AP in a signaling manner, or the STA confirms the location of the sector in which it is located through a channel sounding process.
  • Table 1 is an example table in which the area information is a threshold parameter set of sectors.
  • the AP sets the RTS threshold of a certain sector to be very small, or is set to 0, it means that the STA in the sector always sends the RTS frame before sending the data frame to the AP. If the RTS threshold is set, To be very large, it means that the STA does not need to send an RTS frame before sending a data frame to the AP.
  • the AP can flexibly configure the threshold of each sector independently according to the receiving situation. For example, when the data transmission success rate of a certain sector is high, the RTS threshold is set to a larger value because, some The higher success rate of the data transmission of the sector indicates that the probability of collision is small. Therefore, the RTS threshold can be set to a larger value, and the overhead caused by the transmission of the RTS frame can be reduced. When the success rate of data transmission of a certain sector is low, there may be more hidden sites at the site of the sector, and the AP may set the RTS threshold of the sector where the hidden site of the station of the sector is located to be smaller. The value causes the RTS of the station of the sector to be turned on, thereby performing channel protection and reducing collision.
  • the STA receives the threshold parameter set sent by the AP, and determines the RTS threshold of the sector according to its own area information, that is, the sector in which it is located. For example, according to Table 1, if the sector in which the STA is located is Sector 2, the STA can determine that the corresponding threshold is 1500 bytes. Before the data frame is sent to the AP, if the data frame frame length is greater than the RTS threshold, the RTS frame is sent first. If the data frame frame length is less than the RTS threshold, it is not necessary to send the RTS frame first.
  • the STA starts timing at the end of receiving the radio frame carrying the parameter set, and the STA uses the time range within the time range.
  • the threshold value in the parameter set determines whether to send an RTS frame before sending a data frame to the AP. When the time is over, the STA should not continue to use the threshold, but instead save and use the latest set of threshold parameters sent by the AP.
  • the threshold parameter set sent by the AP includes the correspondence between the area information and the threshold.
  • the area information may be set as a wireless signal measurement parameter of the STA.
  • the second station obtains the threshold corresponding to the site according to the threshold parameter set, and obtains the site according to the wireless signal measurement parameter of the site and the corresponding relationship between the wireless signal measurement parameter and the threshold value. Corresponding threshold.
  • the radio signal measurement parameter of the STA may be: the received power of the STA, the received signal strength indicator (RSSI) of the STA, the packet error rate of the STA within a certain period of time, or the transmit power of the AP, the RSSI of the STA, and the transmit power as parameters.
  • RSSI received signal strength indicator
  • the measurement result of the wireless signal changes, and the different positions have a certain range of variation. Therefore, the wireless signal can be used.
  • the measurement parameters determine the area of the STA.
  • the threshold parameter set will set the correspondence between the RSSI and the threshold.
  • Table 2 is an example table of threshold parameter sets in the case where the area information is a wireless signal measurement parameter
  • the AP side measures the signal power sent by the STA.
  • the signal-to-noise ratio is calculated and counted.
  • the RTS threshold is adjusted. For example, Reduce the RTS threshold and increase the RTS sent by the STA to achieve transmission protection.
  • the STA receives the parameter list sent by the AP, and determines the interval where the RSSI is located and the corresponding RTS threshold according to its own area information, that is, the RSSI value measured by the received signal. For example, if the RSSI of the STA is -45 dBm, the STA can determine that the threshold corresponding to the site is 1500 bytes. Before the data frame is sent to the AP, if the data frame frame length is greater than the RTS threshold, the RTS frame is sent first. If the data frame frame length is less than the RTS threshold, it is not necessary to send the RTS frame first.
  • the wireless signal measurement parameter is a functional relationship between the AP transmit power, the STA's RSSI, and the transmit power as parameters.
  • M AP transmit power, STA's RSSI, STA transmit power, other parameters.
  • f(x) is a functional relationship.
  • M corresponds to the threshold value
  • an exemplary threshold parameter table is shown in Table 3.
  • Table 3 is an example table of threshold parameter sets in the case where the area information is a wireless signal measurement parameter.
  • the area information is an area determined by the sector and the wireless signal measurement parameters.
  • the station determines its own threshold by the sector and wireless signal measurement parameters.
  • Table 3 is a parameter table for the correspondence between sector and wireless signal measurement parameters and threshold values.
  • obtaining the threshold corresponding to the site includes: obtaining the site according to the corresponding sector and wireless signal measurement parameters of the site, and the correspondence between the sector and the wireless signal measurement parameter and the threshold value. The corresponding threshold value of the point.
  • the second station receives the threshold parameter set sent by the first station, where the sector, the relationship between the wireless signal measurement parameter and the threshold value shown in Table 3 is carried, and the sector of the second station is sector2, and the RSSI is - 45dBm, then the second site can determine that the corresponding threshold of this site is 1000 bytes.
  • the first site is an access point AP
  • the second site is a non-access site non-AP STA associated with the AP, referred to as STA.
  • the AP sends a threshold parameter set and channel reservation indication information to the STA associated with itself in the system message Beacon frame sent by itself or in the Probe Response frame.
  • the channel reservation indication information can displayly notify the STA whether to transmit an RTS frame before transmitting the data frame to the AP.
  • the threshold parameter set includes a correspondence between the threshold value and the area information.
  • the unit of the threshold value can be in bytes or the length of the transmission time.
  • the STA If the AP sets the STA to send an RTS frame before sending a data frame to the AP (the corresponding bit is set to 1), the STA first determines its own RTS threshold according to its own area information, and if the length of the data frame sent to the AP Above the RTS threshold, the RTS frame is sent first. If the data frame frame length is less than the RTS threshold, it is not necessary to send the RTS frame first.
  • the STA may ignore the threshold parameter and do not send the RTS frame before transmitting the data frame to the AP.
  • the first site and the second site are non-AP STAs, and the two sites perform direct communication.
  • the two sites should exchange the threshold parameter sets of the respective RTS frames through the management frame before the transmission starts.
  • the parameter examples and the parameter usage methods are the same as those in the previous embodiment, and will not be described again.
  • the first site is an access point AP
  • the second site is a non-access site non-AP STA associated with the AP, referred to as STA.
  • the AP sends a threshold parameter set to the STA associated with itself in the system message Beacon frame sent by itself or in the Probe Response frame.
  • the threshold parameter set includes the correspondence between the QoS level of the data frame and the threshold. That is, the QoS level of the data frame corresponds to a certain RTS threshold.
  • the QoS level of the data frame can be the priority of the traffic flow or the access category to which the data belongs (Access Catogory).
  • the access category there are four types of access categories in the related art: AC-BK (Background), AC-BE (Best effort), AC-VO (Voice), and AC-VI (Video, video).
  • the frame lengths of data frames with different access categories may be different, so the RTS thresholds can be set separately.
  • the following is an example of a threshold parameter representation of a data QoS level corresponding threshold.
  • the corresponding RTS threshold is determined according to the QoS level of the data frame to be sent.
  • the RTS frame is sent first, otherwise the data frame is directly sent.
  • the first site is an access point AP
  • the second site is a non-access site non-AP STA associated with the AP, referred to as STA.
  • the AP sends a threshold parameter set to the STA associated with itself in the system message Beacon frame sent by itself.
  • the threshold parameter level includes a threshold value when the STA sends an RTS frame to the AP, and whether the STA is notified to send an RTS frame before sending the data frame to the AP.
  • the AP sets the STA to send an RTS frame before sending the data frame to the AP (the corresponding bit is set to 1), if the data frame frame length sent by the STA to the AP is greater than the RTS threshold, the RTS frame is sent first. If the data frame frame length is less than the RTS threshold, it is not necessary to send the RTS frame first.
  • the STA may ignore the threshold parameter and do not send the RTS frame before transmitting the data frame to the AP.
  • the threshold parameter set sent by the AP to the associated STA includes the first area information set and the channel reservation indication information.
  • the first area information set includes one or more area information.
  • the area information is the sector to which the STA belongs, or is the wireless measurement parameter of the STA, or is a sector and wireless measurement parameters.
  • the STA Determining, by the STA according to the channel reservation indication information and the first area information set carried in the threshold parameter set, whether the channel reservation needs to be performed; wherein the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the second When the area information of the station belongs to the first area information set, it is confirmed that the channel reservation needs to be performed; otherwise, it is confirmed that the channel reservation is not required to be performed;
  • the STA determines whether the own sector belongs to the first area information. The set notified sector, if yes, confirms that the channel reservation needs to be performed, and performs channel reservation before transmitting the data frame; when the area information in the first area information set is the wireless measurement parameter, the STA determines its own wireless Whether the measurement parameter belongs to the wireless measurement parameter notified by the first area information set, and if yes, confirms that channel reservation needs to be performed, performs channel reservation before transmitting the data frame; and the area information in the first area information set is sector and wireless In the case of measuring parameters, the STA determines whether the sector belongs to the sector notified by the first area information set, and determines whether the own wireless measurement parameter belongs to the wireless measurement parameter notified by the first area information set, if both are Yes, it is confirmed that channel reservation needs to be performed, and channel reservation is performed before data frame is transmitted.
  • the STA determines whether the sector belongs to the sector notified by the first area information set, and determines whether the own wireless measurement parameter belongs to the wireless measurement parameter notified by
  • performing channel reservation before sending a data frame includes: when the STA needs to send a data frame to the AP, determining whether the length of the data frame is greater than a threshold; if the STA is greater than the threshold, sending a channel reservation request The frame receives the response frame corresponding to the channel reservation request frame replied by the AP, and after receiving the response frame, sends a data frame to the AP; When the threshold is equal to, the data frame is sent to the AP.
  • the STA After the STA informs the area information in the threshold parameter set, the STA determines that it belongs to the notified area, and the channel reservation indication information indicates that the STA needs to send the RTS frame before sending the data frame, the STA determines whether to send according to the threshold value set by the STA itself. RTS frame. When the data frame length is greater than the threshold value set by itself, the RTS frame is sent first before the data frame is sent, otherwise the RTS frame is not sent. When the channel reservation indication information indicates that the STA does not need to transmit the RTS frame, the STA ignores the threshold value set by itself, and does not have to send the RTS frame.
  • the threshold parameter set sent by the AP to the associated STA includes channel reservation indication information and a first QoS level information set, where the first QoS level information set includes one or more QoS levels.
  • the QoS level of the data frame is the same as that described in Embodiment 6.
  • the STA determines whether to send the RTS frame according to the threshold value set by the STA itself.
  • the STA ignores the threshold value set by itself, and does not have to send the RTS frame.
  • the first site is an access point AP
  • the second site is a non-access site non-AP STA associated with the AP.
  • the STA is used as an example for description.
  • the first site and the second site are used. It can be two STA stations that communicate directly.
  • the embodiment of the present invention further provides a data transmission apparatus, which is disposed on an access point site AP.
  • the data transmission apparatus provided by the present invention includes:
  • the threshold parameter set sending unit 10 is configured to send a threshold parameter set, where the threshold parameter set carries information about notifying the second station to send a channel reservation request frame;
  • the receiving unit 20 is configured to receive a channel reservation request frame sent by the second station;
  • the response frame sending unit 30 is configured to send a response frame corresponding to the channel reservation request frame
  • the receiving unit 20 is further configured to receive a data frame sent by the second station.
  • the threshold parameter set sent by the threshold parameter set sending unit 10 includes any one of the following information:
  • Channel reservation indication information wherein the channel reservation indication information is used to indicate whether the second station sends the channel reservation request frame
  • the threshold parameter set sent by the threshold parameter set sending unit 10 includes at least one of the following contents:
  • the area information includes at least one of the following information:
  • the threshold parameter set sent by the threshold parameter set sending unit 10 further includes:
  • the effective time length is used to notify the second station that the channel reservation needs to be performed before the data frame is transmitted within the valid time length.
  • the wireless signal measurement parameter includes at least one of the following data:
  • the second station receives the received power when the first station sends a signal
  • the received signal strength of the second station indicates RSSI
  • the packet error rate of the second station during the predetermined time period is the packet error rate of the second station during the predetermined time period.
  • the embodiment of the present invention further provides a data transmission apparatus, which is disposed on a non-access point station STA.
  • the data transmission apparatus provided by the present invention includes:
  • the threshold parameter set receiving unit 50 is configured to receive a threshold parameter set sent by the first station
  • the channel reservation unit 60 is configured to: when the data frame needs to be sent, send a channel reservation request frame according to the information carried in the threshold parameter set;
  • the data frame transmitting unit 70 is configured to transmit the data frame after receiving the response frame corresponding to the channel reservation request frame.
  • the channel reservation unit 60 includes a threshold value determination module 61, a reservation request frame transmission module 62, and a response frame receiving module 63;
  • the threshold value determining module 61 is configured to determine whether the length of the data frame is greater than a threshold value
  • the reservation request frame sending module 62 is configured to send a channel reservation request frame when the length of the data frame is greater than a threshold value
  • the response frame receiving module 63 is configured to receive a response frame corresponding to the channel reservation request frame sent by the first station;
  • the data transmission device further includes:
  • the channel reservation confirming unit 80 is configured to confirm whether the information carried in the threshold parameter set is based on It is necessary to perform channel reservation; when it is confirmed that channel reservation needs to be performed, the channel reservation unit is notified to perform channel reservation;
  • the notification data frame transmitting unit transmits the data frame.
  • the channel reservation confirming unit 80 includes at least one of the following modules:
  • the first confirmation module 81 is configured to confirm, according to the channel reservation indication information carried in the threshold parameter set, whether the channel reservation needs to be performed; wherein the channel reservation indication information is used to indicate whether the second station sends the channel reservation request frame;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, it is confirmed that the channel reservation needs to be performed; and the channel reservation indication information indicates that the second station does not send the channel reservation request frame. When it is confirmed that it is not necessary to perform channel reservation;
  • the second confirmation module 82 is configured to confirm, according to the channel reservation indication information and the first area information set carried in the threshold parameter set, whether the channel reservation needs to be performed;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the area information of the second station belongs to the first area information set, it is confirmed that the channel reservation needs to be performed; otherwise, it is confirmed as not Need to perform channel reservation;
  • the third confirmation module 83 is configured to confirm, according to the channel reservation indication information carried by the threshold parameter set and the first QoS level set, whether the channel reservation needs to be performed;
  • the channel reservation indication information indicates that the second station sends the channel reservation request frame, and the QoS level of the data frame to be transmitted belongs to the first QoS level set, it is confirmed that the channel reservation needs to be performed; otherwise, the confirmation is performed. It is not necessary to perform channel reservation.
  • the channel reservation unit 60 further includes:
  • the threshold value obtaining module 64 is configured to acquire a threshold value corresponding to the second station according to the threshold parameter set.
  • the threshold parameter set includes: the second site to the first site The threshold value at which the channel reservation request frame is transmitted;
  • the threshold value obtaining module 64 includes:
  • the first threshold acquisition sub-module 641 is configured to read the threshold value in the threshold parameter set, and use the read threshold as the threshold of the second station.
  • the threshold parameter set includes a correspondence between the area information and the threshold value
  • the threshold acquisition module includes:
  • the second threshold obtaining sub-module 642 is configured to acquire a threshold value of the second station according to the correspondence between the area information of the threshold parameter set and the threshold value, and the area information of the second station;
  • the area information includes at least one of the following information:
  • the second threshold value obtaining sub-module 642 is configured to acquire according to the sector to which the second station belongs and the correspondence between each sector and the threshold value. The threshold corresponding to the second site;
  • the second threshold value acquisition sub-module 642 is configured to obtain the wireless signal measurement parameter corresponding to the second station and the corresponding relationship between the wireless signal measurement parameter and the threshold value.
  • the second threshold value acquisition sub-module 642 is configured to measure the parameter and the sector according to the sector and the wireless signal corresponding to the second station. And the corresponding relationship between the wireless signal measurement parameter and the threshold value, and the threshold value corresponding to the second station is obtained.
  • the threshold parameter set includes a correspondence between a QoS level and a threshold value
  • the threshold acquisition module includes:
  • the third threshold acquisition sub-module 643 is configured to acquire a threshold corresponding to the second station according to the QoS level corresponding to the second station and the correspondence between the QoS level and the threshold.
  • the wireless signal measurement parameter includes at least one of the following data:
  • the second station receives the received power when the first station sends a signal
  • the packet error rate of the second station during the predetermined time period is the packet error rate of the second station during the predetermined time period.
  • the threshold parameter set further includes an effective time length
  • the channel reservation unit 60 further includes a timing module (not shown) for timing the radio frame reception end time of the threshold parameter set for the valid time length; so that the channel reservation unit is Within the effective length of time, the channel reservation is performed before the data frame is transmitted according to the information carried by the threshold parameter set.
  • a timing module (not shown) for timing the radio frame reception end time of the threshold parameter set for the valid time length; so that the channel reservation unit is Within the effective length of time, the channel reservation is performed before the data frame is transmitted according to the information carried by the threshold parameter set.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • S1 Send a threshold parameter set to the second station, where the threshold parameter set carries information about notifying the second station to send a channel reservation request frame;
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the first station sends a threshold parameter set to the second station, where the threshold parameter set carries information about notifying the second station to send a channel reservation request frame; the first station receives the second station sending a channel reservation request frame; the first station sends a response frame corresponding to the channel reservation request frame to the second station; and the first station receives the data frame sent by the second station.
  • the first station can flexibly control whether the site turns on the RTS protection according to the channel busyness and channel quality, and flexibly sets the RTS threshold size, and can effectively avoid collision under the premise of ensuring certain communication efficiency.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un procédé et un dispositif de transmission de données. Le procédé comprend les étapes suivantes : une première station envoie à une seconde station un ensemble de paramètres de seuil, l'ensemble de paramètres de seuil portant des informations indiquant à la seconde station d'envoyer une trame de demande pour émettre (RTS); la première station reçoit une trame RTS envoyée par la seconde station; la première station envoie à la seconde station une trame de réponse correspondant à la trame RTS; et la première station reçoit une trame de données envoyée par la seconde station. En utilisant la solution susmentionnée, la présente invention permet à une première station de commander de manière souple, en fonction d'un état occupé/libre de canal et de la qualité de canal, si la station doit activer ou non la protection RTS, et de configurer de manière flexible une grandeur d'un seuil RTS, ce qui évite efficacement une collision tout en garantissant un certain niveau d'efficacité de communication.
PCT/CN2016/108890 2016-02-05 2016-12-07 Procédé et dispositif de transmission de données WO2017133314A1 (fr)

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CN109688628B (zh) * 2017-10-19 2020-12-08 华为技术有限公司 信号传输方法、相关装置及系统
CN108882310B (zh) * 2018-08-22 2023-05-02 深圳全志在线有限公司 Rts/cts机制运行状态的确定方法、设备和介质
CN113747503B (zh) * 2021-08-05 2024-06-25 维沃移动通信有限公司 数据传输方法、装置及发送端设备
CN116133147A (zh) * 2021-11-12 2023-05-16 华为技术有限公司 数据传输方法及装置、存储介质、程序产品

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1917462A (zh) * 2005-08-19 2007-02-21 三星电子株式会社 在无线局域网(wlan)中传输帧
CN101150442A (zh) * 2007-10-25 2008-03-26 杭州华三通信技术有限公司 一种bss网络内sta的管理方法和设备
US20100014452A1 (en) * 2008-07-15 2010-01-21 Fujitsu Limited Communication control apparatus
CN102595623A (zh) * 2011-01-13 2012-07-18 中兴通讯股份有限公司 一种多帧传输方法及系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101695019B (zh) * 2009-11-10 2013-03-20 杭州华三通信技术有限公司 一种报文发送方法和设备
CN101730107B (zh) * 2010-01-29 2012-07-25 北京新岸线无线技术有限公司 一种无线局域网的接入方法及系统
CN103916972B (zh) * 2013-01-04 2017-06-20 中国移动通信集团公司 一种启动rts/cts机制的方法和装置
US9736850B2 (en) * 2013-08-28 2017-08-15 Qualcomm Incorporated Adaptive RTS/CTS in high-efficiency wireless communications
EP2919546A1 (fr) * 2014-03-12 2015-09-16 Nokia Corporation Coordination de RTS-CTS dans un réseau sans fil
CN105050197B (zh) * 2015-03-31 2018-09-14 魅族科技（中国）有限公司 一种无线通信方法、相关设备及系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1917462A (zh) * 2005-08-19 2007-02-21 三星电子株式会社 在无线局域网(wlan)中传输帧
CN101150442A (zh) * 2007-10-25 2008-03-26 杭州华三通信技术有限公司 一种bss网络内sta的管理方法和设备
US20100014452A1 (en) * 2008-07-15 2010-01-21 Fujitsu Limited Communication control apparatus
CN102595623A (zh) * 2011-01-13 2012-07-18 中兴通讯股份有限公司 一种多帧传输方法及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications", IEEE STD 802. 11-2012, 29 March 2012 (2012-03-29) *

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