CN107046730B - Data transmission method and device - Google Patents
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- 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
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Abstract
The invention discloses a data transmission method and a device, wherein the method comprises the following steps: a first site sends a threshold parameter set to a second site, wherein the threshold parameter set carries related information for informing the second site to send a channel reservation request frame; a first station receives a channel reservation request frame sent by a 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. Through the scheme, the first station can flexibly control whether the station starts RTS protection according to channel busy and idle and channel quality, flexibly set the RTS threshold value size, and can effectively avoid collision on the premise of ensuring certain communication efficiency.
Description
Technical Field
The present invention relates to the field of data communications, and in particular, to a data transmission method and apparatus.
Background
Currently, as more people use WLANs for data communications, the load on WLAN networks is increasing. Particularly, in a dense deployment scenario, as the number of Access Points (APs) and the number of non-AP stations (non-AP STAs) increase, the situation of basic service set Overlap (OBSS) is severe, the interference situation is complex, and the efficiency of the WLAN network tends to decrease significantly.
One problem that is inevitable in WLAN networks is hidden stations. As shown in fig. 1A. The station A sends data to the station B, and the station C also sends data to the station B, because the C and the A are both out of the coverage range of each other, the simultaneous sending of the A and the C causes conflict, and the B cannot correctly receive the data. A and C are hidden sites of each other.
In order to avoid the interference of the OBSS and solve the hidden station problem, 802.11 has a protection mechanism, that is, before sending the data frame, the transceiver and the transceiver interactively send a Request To Send (RTS) frame and a channel reservation response (CTS) frame to perform channel reservation. Fig. 1B is a schematic diagram of RTS and CTS frame exchange, and in combination with fig. 1B, the specific way of channel reservation is: the sender sends RTS frame, which contains a time domain (channel reservation time) to indicate the time length needed by the sender to complete frame exchange; the receiver responds to the CTS frame, which also contains a time field to ensure that the sender can complete the frame exchange. Other listening stations which listen to the RTS/CTS set a Network Allocation Vector (NAV), and the value of the NAV is set as the maximum value of the two time domains; in the time, the overhearing station cannot send data, so that the situation that hidden nodes compete for channels and cause collision is avoided. The NAV decreases with the time slot, and other stations can transmit data after the NAV decreases to zero.
The frame lengths of RTS and CTS are short, so a station can send RTS first before sending a data frame, if CTS is successfully received, the channel condition is good, and if the channel is reserved, data is continuously sent, and if RTS is not successfully received, collision is indicated, or the channel condition is not good. The cost of using RTS/CTS to detect the channel is low, the response is fast, and the waste of channel resources caused by directly sending long data frames but generating collision is avoided.
In the prior art, the RTS is not sent before any data is sent, but the station sets an RTS threshold, and when the length of a data frame exceeds the RTS threshold, the RTS/CTS handshake is performed before the data frame is sent. The RTS threshold is set by the station itself, and in an intensive scene environment, if the station itself sets the RTS threshold to be very high, the station does not send RTS before all data is sent, and thus more collisions may be caused. However, this scheme has the disadvantages that the flexibility is not high, and for a scenario where a station sends a short frame, forcing to turn on the RTS causes some overhead, and the channel transmission efficiency is reduced.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method and an apparatus for data transmission, which can improve the reliability of data transmission between mobile terminals.
In order to achieve the above object, the present invention provides a data transmission method, including:
a first site sends a threshold parameter set to a second site, wherein the threshold parameter set carries related information for informing the second site to send a channel reservation request frame;
a first station receives a channel reservation request frame sent by a 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.
Preferably, any one of the following information is included in the threshold parameter set:
channel reservation indication information; wherein the channel reservation indication information is used to indicate whether the second station transmits the channel reservation request frame;
channel reservation indication information and a first set of region information;
channel reservation indication information and a first set of QoS levels.
Preferably, the threshold parameter set includes at least one of the following:
a threshold value when the second station sends a channel reservation request frame to the first station;
the corresponding relation between the area information and the threshold value;
and the corresponding relation between the QoS grade of the data frame and the threshold value.
Preferably, the area information includes at least one of the following information:
a sector to which the second site belongs;
the wireless signal measures a parameter.
Preferably, the radio signal measurement parameter comprises at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a Received Signal Strength Indication (RSSI) of the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
Preferably, the threshold parameter set further includes:
the effective time length; wherein the effective time length is used for informing the second station that channel reservation needs to be performed before the data frame is transmitted within the effective time length.
Preferably, the unit of the threshold value is byte or transmission time length.
Preferably, the first station is an access point, or a station in direct communication with the second station.
In order to achieve the above object, the present invention further provides a data transmission method, including:
the second station receives the threshold parameter set sent by the first station;
when a data frame needs to be sent, a channel reservation request frame is sent according to the information carried by the threshold parameter set;
and after receiving a response frame corresponding to the channel reservation request frame, sending the data frame.
Preferably, before sending the channel reservation request frame according to the information carried by the threshold parameter set, the data transmission method further includes:
confirming whether channel reservation needs to be executed or not according to the information carried by the threshold parameter set;
when confirming that the channel reservation needs to be executed, executing the step of sending the channel reservation request frame when the length of the data frame is larger than a threshold value; when the length of the data frame is smaller than a threshold value, executing the step of sending the data frame;
and when it is determined that the channel reservation does not need to be performed, performing the step of transmitting the data frame.
Preferably, the determining whether the channel reservation needs to be executed according to the information carried by the threshold parameter set is executed according to any one of the following manners:
the first method is as follows:
confirming whether channel reservation needs to be executed according to channel reservation indication information carried by a threshold parameter set; wherein the channel reservation indication information is used to indicate whether the second station transmits the channel reservation request frame;
when the channel reservation indication information indicates that the second station sends the channel reservation request frame, confirming that channel reservation needs to be executed; confirming that channel reservation does not need to be executed when the channel reservation indication information indicates that the second station does not transmit the channel reservation request frame;
the second method comprises the following steps:
confirming whether channel reservation needs to be executed or not according to channel reservation indication information carried by a threshold parameter set and a first area information set;
confirming that channel reservation needs to be performed when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the area information of the second station belongs to the first area information set; otherwise, confirming that the channel reservation does not need to be executed;
the third method comprises the following steps:
confirming whether channel reservation needs to be executed or not according to channel reservation indication information carried by a threshold parameter set and a first QoS level set;
when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the QoS level of the data frame to be transmitted belongs to the first QoS level set, confirming that channel reservation needs to be executed; otherwise, it is confirmed that the channel reservation does not need to be performed.
Preferably, before the transmitting of the channel reservation request frame, the data transmission method further includes:
and the second station acquires the threshold value corresponding to the second station according to the threshold parameter set.
Preferably, the threshold parameter set includes: a threshold value when the second station sends a channel reservation request frame to the first station;
the obtaining of the threshold value corresponding to the second station according to the threshold parameter set includes:
and reading the threshold value in the threshold parameter set, and taking the read threshold value as the threshold value of the second site.
Preferably, the threshold parameter set includes a correspondence between the area information and the threshold value;
the region information includes at least one of the following information:
a sector to which the second site belongs;
a wireless signal measurement parameter;
in a case that the area information includes a sector to which the second station belongs, the obtaining, according to the threshold parameter set, a threshold value corresponding to the second station includes:
acquiring a threshold value corresponding to the second site according to the sector to which the second site belongs and the corresponding relation between each sector and the threshold value;
under the condition that the area information includes the wireless signal measurement parameter, the obtaining the threshold value corresponding to the second station according to the threshold parameter set includes:
acquiring a threshold value corresponding to the second station according to the wireless signal measurement parameter corresponding to the second station and the corresponding relation between the wireless signal measurement parameter and the threshold value;
under the condition that the region information includes the sector to which the second station belongs and the radio signal measurement parameter, the obtaining the threshold value corresponding to the second station according to the threshold parameter set includes:
and acquiring a threshold value corresponding to the second site according to the sector and the wireless signal measurement parameter corresponding to the second site and the corresponding relation between the sector and the wireless signal measurement parameter and the threshold value.
Preferably, the threshold parameter set includes a corresponding relationship between a QoS level and a threshold value;
under the condition that the threshold parameter set comprises the corresponding relation between the QoS grade and the threshold value, the obtaining the threshold value corresponding to the second station according to the threshold parameter set comprises:
and acquiring the threshold corresponding to the second site according to the QoS grade corresponding to the second site and the corresponding relation between the QoS grade and the threshold.
Preferably, the radio signal measurement parameter comprises at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a received signal strength indication RSSI corresponding to the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
Preferably, the threshold parameter set further includes an effective time length; according to the effective time length, the second station starts timing from the receiving end time of the wireless frame carrying the threshold parameter set;
and in the effective time length, the second station executes channel reservation before sending the data frame according to the information carried by the threshold parameter set.
Preferably, the second station is a station associated with the first station, or the second station is a station in direct communication with the first station.
In order to achieve the above object, the present invention further provides a data transmission device, which is disposed on an AP, and includes:
a threshold parameter set sending unit, configured to send a threshold parameter set, where the threshold parameter set carries related information that informs a second station to send a channel reservation request frame;
a receiving unit, configured to receive a channel reservation request frame sent by a second station;
a response frame transmitting unit, configured to transmit 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.
Preferably, 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 transmits the channel reservation request frame;
channel reservation indication information and a first set of region information;
channel reservation indication information and a first set of QoS levels.
Preferably, the threshold parameter set sent by the threshold parameter set sending unit includes at least one of the following:
a threshold value when the second station sends a channel reservation request frame to the first station;
the corresponding relation between the area information and the threshold value;
and the corresponding relation between the QoS grade of the data frame and the threshold value.
Preferably, the area information includes at least one of the following information:
a sector to which the second site belongs;
the wireless signal measures a parameter.
Preferably, the threshold parameter set sent by the threshold parameter set sending unit further includes:
the effective time length; wherein the effective time length is used for informing the second station that channel reservation needs to be performed before the data frame is transmitted within the effective time length.
Preferably, the radio signal measurement parameter comprises at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a Received Signal Strength Indication (RSSI) of the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
In order to achieve the above object, the present invention further provides a data transmission apparatus, which is disposed on a non-access point station STA, and includes:
a threshold parameter set receiving unit, configured to receive a threshold parameter set sent by a first station;
the channel reservation unit is used for sending a channel reservation request frame according to the information carried by the threshold parameter set when the data frame needs to be sent;
and a data frame transmitting unit, configured to transmit the data frame after receiving a response frame corresponding to the channel reservation request frame.
Preferably, the channel reservation unit includes a threshold value judgment module, a reservation request frame transmission module, and a response frame receiving module;
the threshold value judging module is used for judging whether the length of the data frame is greater than a threshold value;
the reservation request frame sending module is used for sending a channel reservation request frame when the length of the data frame is greater than a threshold value;
the response frame receiving module is used for receiving a response frame corresponding to a channel reservation request frame sent by a first station;
the data transmission apparatus further includes:
a channel reservation confirming unit, configured to confirm whether channel reservation needs to be executed according to information carried by the threshold parameter set; when confirming that the channel reservation needs to be executed, informing a channel reservation unit to execute the channel reservation;
when it is confirmed that the channel reservation does not need to be performed, the data frame transmission unit is notified to transmit the data frame.
Preferably, the channel reservation confirming unit includes at least one of the following modules:
the first confirming module is used for confirming whether channel reservation needs to be executed or not according to the channel reservation indication information carried by the threshold parameter set; wherein the channel reservation indication information is used to indicate whether the second station transmits the channel reservation request frame;
when the channel reservation indication information indicates that the second station sends the channel reservation request frame, confirming that channel reservation needs to be executed; confirming that channel reservation does not need to be executed when the channel reservation indication information indicates that the second station does not transmit the channel reservation request frame;
the second confirming module is used for confirming whether channel reservation needs to be executed or not according to the channel reservation indication information carried by the threshold parameter set and the first area information set;
confirming that channel reservation needs to be performed when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the area information of the second station belongs to the first area information set; otherwise, confirming that the channel reservation does not need to be executed;
a third confirming module, configured to confirm whether channel reservation needs to be performed according to the channel reservation indication information carried by the threshold parameter set and the first QoS class set;
when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the QoS level of the data frame to be transmitted belongs to the first QoS level set, confirming that channel reservation needs to be executed; otherwise, it is confirmed that the channel reservation does not need to be performed.
Preferably, the channel reservation unit further includes:
and the threshold value acquisition module is used for acquiring the threshold value corresponding to the second station according to the threshold parameter set.
Preferably, the threshold parameter set includes: a threshold value when the second station sends a channel reservation request frame to the first station;
the threshold value acquisition module comprises:
and the first threshold value acquisition sub-module is used for reading the threshold values in the threshold parameter set and taking the read threshold values as the threshold values of the second station.
Preferably, the threshold parameter set includes a correspondence between the area information and the threshold value;
the threshold value acquisition module comprises:
the second threshold value obtaining submodule is used for obtaining the threshold value of the second station according to the corresponding relation between the area information in the threshold parameter set and the threshold value and the area information of the second station;
the region information includes at least one of the following information:
a sector to which the second site belongs;
a wireless signal measurement parameter;
the second threshold value obtaining submodule is used for obtaining the threshold value corresponding to the second site according to the sector to which the second site belongs and the corresponding relation between each sector and the threshold value under the condition that the area information comprises the sector to which the second site belongs;
under the condition that the regional information comprises the wireless signal measurement parameter, the second threshold value acquisition sub-module is used for acquiring the threshold value corresponding to the second site according to the wireless signal measurement parameter corresponding to the second site and the corresponding relation between the wireless signal measurement parameter and the threshold value;
and under the condition that the area information comprises the sector to which the second site belongs and the wireless signal measurement parameter, the second threshold value acquisition submodule is used for acquiring the threshold value corresponding to the second site according to the sector and the wireless signal measurement parameter corresponding to the second site and the corresponding relation between the sector, the wireless signal measurement parameter and the threshold value.
Preferably, the threshold parameter set includes a corresponding relationship between a QoS level and a threshold value;
the threshold value acquisition module comprises:
and the third threshold obtaining submodule is used for obtaining the threshold corresponding to the second site according to the QoS grade corresponding to the second site and the corresponding relation between the QoS grade and the threshold.
Preferably, the radio signal measurement parameter comprises at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a received signal strength indication RSSI corresponding to the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
Preferably, the threshold parameter set further includes an effective time length; wherein,
the channel reservation unit further comprises a timing module, configured to start timing from the radio frame reception end time carrying the threshold parameter set according to the effective time length; and the channel reservation unit executes channel reservation before sending the data frame according to the information carried by the threshold parameter set in the effective time length.
Compared with the prior art, the technical scheme provided by the invention comprises the following steps: a first site sends a threshold parameter set to a second site, wherein the threshold parameter set carries related information for informing the second site to send a channel reservation request frame; a first station receives a channel reservation request frame sent by a 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. By the scheme of the invention, the first station can flexibly control whether the station starts RTS protection according to the busy and idle channel and the channel quality, flexibly set the RTS threshold value size, and effectively avoid collision on the premise of ensuring certain communication efficiency.
Drawings
The accompanying drawings in the embodiments of the present invention are described below, and the drawings in the embodiments are provided for further understanding of the present invention, and together with the description serve to explain the present invention without limiting the scope of the present invention.
FIG. 1A is a schematic view 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;
fig. 3A, fig. 3B, fig. 3C, and fig. 3D are schematic diagrams of obtaining threshold values according to an embodiment of the present invention;
fig. 4 and fig. 5 are schematic structural diagrams of a data transmission device according to an embodiment of the present invention.
Detailed Description
The following further description of the present invention, in order to facilitate understanding of those skilled in the art, is provided in conjunction with the accompanying drawings and is not intended to limit the scope of the present invention. In the present application, the embodiments and various aspects of the embodiments may be combined with each other without conflict.
Referring to fig. 2, the present invention provides a data transmission method, including:
in step 140, the second station performs channel reservation when it needs to send a data frame.
Step 140 specifically includes:
And receiving a confirmation frame corresponding to the channel reservation request frame replied by the first site, which indicates that the channel reservation is successful.
Preferably, before step 140, the method further comprises:
when confirming that the channel reservation needs to be executed, executing step 140; when the length of the data frame is smaller than a threshold value, executing the step of sending the data frame;
upon confirmation that channel reservation need not be performed, step 150 is performed.
Wherein step 130 is performed in any of the following ways:
the first method is as follows:
confirming whether channel reservation needs to be executed according to channel reservation indication information carried by a threshold parameter set; wherein the channel reservation indication information is used to indicate whether the second station transmits the channel reservation request frame;
when the channel reservation indication information indicates that the second station sends the channel reservation request frame, confirming that channel reservation needs to be executed; confirming that channel reservation does not need to be executed when the channel reservation indication information indicates that the second station does not transmit the channel reservation request frame;
the second method comprises the following steps:
confirming whether channel reservation needs to be executed or not according to channel reservation indication information carried by a threshold parameter set and a first area information set;
confirming that channel reservation needs to be performed when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the area information of the second station belongs to the first area information set; otherwise, confirming that the channel reservation does not need to be executed;
the third method comprises the following steps:
confirming whether channel reservation needs to be executed or not according to channel reservation indication information carried by a threshold parameter set and a first QoS level set;
when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the QoS level of the data frame to be transmitted belongs to the first QoS level set, confirming that channel reservation needs to be executed; otherwise, it is confirmed that the channel reservation does not need to be performed.
The first station may send the threshold parameter set to the second station in a unicast, multicast, or broadcast manner, and in particular, the sending may be periodic, event-triggered, or request from the second station.
After receiving the threshold parameter set sent by the first site, the second site confirms whether channel reservation needs to be executed or not according to information carried by the threshold parameter set and determines the size of the threshold value.
Or after receiving the threshold parameter set, the second station determines, periodically or aperiodically, whether it needs to perform channel reservation or not according to the information carried by the threshold parameter set, and determines the size of the threshold value, due to the change of its own geographical location or the change of its own surrounding wireless environment. The second station may do this at idle times when it is not transmitting or receiving, or before each data frame is transmitted.
Example one
In the embodiment of the present invention, a first station is taken as an AP, and a second station is a non-access station non-AP STA (STA for short) associated with the AP. The AP sends the threshold parameter set to the STA associated with the AP in a system message Beacon frame or a Probe Response frame sent by the AP.
In the embodiment of the invention, the threshold parameter set comprises the corresponding relation between the area information and the threshold value. It should be noted that the unit of the threshold value may be represented by bytes, or may be represented by the length of the transmission time. Before step 110, the AP sets the correspondence between the area information and the threshold value. In this embodiment, the area information refers to a sector to which the STA belongs. As shown in fig. 3A. How to divide sectors belongs to the prior art, generally, for a BSS, an AP may divide sectors of the BSS according to the coverage area of a directional antenna, and an STA associated with the AP belongs to a certain sector. Alternatively, the AP divides the entire BSS into sectors according to the site geographical location distribution of the STAs associated therewith. The threshold value for sending RTS frames set by each sector may be the same or different. The sector information of the STA is notified in advance by the AP in a signaling manner, or the STA confirms the location of the sector where it is located through a channel sounding (sounding) process.
See table 1 for an exemplary threshold parameter set.
| Sector area | RTS threshold value (unit: byte) |
| Sector 1 | 1500 |
| Sector 2 | 1500 |
| Sector 3 | 1000 |
| … | … |
Table 1 is an exemplary table of threshold parameter sets for which the region information is a sector
If the RTS threshold of an AP is set to be very small or set to 0, it indicates that an STA in the sector always needs to send an RTS frame before sending a data frame to the AP, and if the RTS threshold is set to be very large, it indicates that the STA does not need to send an RTS frame before sending a data frame to the AP.
The AP may flexibly and independently configure the threshold of each sector according to the receiving situation, for example, when the data transmission success rate of a certain sector is higher, the RTS threshold is set to a larger value, because the data transmission success rate of a certain sector is higher, which indicates that the probability of collision is smaller, so the RTS threshold may be set to a larger value, which reduces the overhead caused by sending the RTS frame. When the success rate of data transmission of a certain sector is low, there may be more hidden stations of the station of the sector, and the AP may set the RTS threshold of the sector where the hidden station of the sector is located to a small value, so that the RTS of the station of the sector is 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 value of the sector according to the own region information, namely the sector where the STA is located. For example, according to table 1, if the Sector in which the STA is located is Sector2, the STA may determine that the corresponding threshold is 1500 bytes. Before sending a data frame to the AP, if the length of the data frame is greater than the RTS threshold, an RTS frame is sent first. If the length of the data frame is smaller than the RTS threshold value, the RTS frame does not need to be sent first.
If the effective time length of the threshold value is also included in the threshold parameter set, the STA starts timing at the end time of receiving the wireless frame carrying the parameter set, and in the time range, the STA judges whether to send an RTS frame before sending a data frame to the AP by using the threshold value in the parameter set. When this time is over, the STA should not continue to use the threshold value, but rather locally save and use the most recently transmitted set of threshold parameters by the AP.
Example two
As shown in fig. 3B. In the embodiment of the present invention, the threshold parameter set sent by the AP includes a correspondence between the area information and the threshold value. In this embodiment, the area information may be set as a wireless signal measurement parameter of the STA.
In step 120, the obtaining, by the second station, the threshold value corresponding to the station according to the threshold parameter set includes: and acquiring the threshold corresponding to the site according to the wireless signal measurement parameter of the site and the corresponding relation between the wireless signal measurement parameter and the threshold.
The wireless signal measurement parameters 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 in a certain time, or a functional relation using the transmission power of the AP, the RSSI of the STA, and the transmission power as parameters.
In the actual communication process, the measurement parameter result of the wireless signal of the STA changes according to the position of the STA and the change of the surrounding wireless environment in the communication process of the STA and the AP, and different positions have a certain change range, so that the area of the STA can be determined according to the measurement parameter of the wireless signal.
For example, the radio signal measurement parameter is the received signal strength indication RSSI of the STA, and then the correspondence between RSSI and threshold value will be set in the set of threshold parameters.
See table 2 for an exemplary threshold parameter set.
| RSSI(dBm) | RTS threshold value (byte) |
| -30～-40 | 2000 |
| -40～-50 | 1500 |
| -50～-60 | 500 |
| … | … |
Table 2 example table of threshold parameter sets where the zone information is a wireless signal measurement parameter
In the actual operation process, the AP side measures the power of the signal sent by the STA, calculates the signal-to-noise ratio when the signal sent by the STA is interfered, performs statistics, and adjusts the threshold of the RTS, for example, reduces the threshold of the RTS, and increases the RTS sent by the STA when the interference reaches a certain degree, thereby achieving the purpose of transmission protection.
The STA receives the parameter table sent by the AP, and determines the interval of the RSSI and the corresponding RTS threshold value according to the own area information, namely the RSSI value measured by the STA on the received signal. For example, the RSSI of the STA is-45 dBm, then the STA may determine that the local station corresponds to a threshold of 1500 bytes. Before sending a data frame to the AP, if the length of the data frame is greater than the RTS threshold, an RTS frame is sent first. If the length of the data frame is smaller than the RTS threshold value, the RTS frame does not need to be sent first.
For another example, the radio signal measurement parameter is a functional relation in which the transmission power of the AP, the RSSI of the STA, and the transmission power are parameters. Let M be the radio signal measurement parameter, then M ═ f (AP transmit power, RSSI of STA, STA transmit power, other parameters). And f (x) is a functional relation.
M corresponds to a threshold value, an exemplary threshold parameter table is shown in table 3.
| M(dBm) | RTS threshold value (byte) |
| -30～-40 | 2000 |
| -40～-50 | 1500 |
| -50～-60 | 500 |
| … | … |
Table 3 is an exemplary table of threshold parameter sets in the case that the area information is a wireless signal measurement parameter
EXAMPLE III
As shown in fig. 3C. In this example, the area information is an area determined by the sector and the radio signal measurement parameter, and the station determines its corresponding threshold value by the sector where the station is located and the radio signal measurement parameter.
See table 4 for an exemplary parameter table of the correspondence of sector, radio signal measurement parameters and threshold values.
Table 3 is a parameter table of the corresponding relationship between the sector, the wireless signal measurement parameter and the threshold value
Under the condition that the regional information comprises the sector where the site is located and the wireless signal measurement parameters, the obtaining of the threshold value corresponding to the site according to the threshold parameter set comprises: and acquiring the corresponding threshold value of the local station according to the corresponding sector and wireless signal measurement parameters of the local station and the corresponding relation between the sector and wireless signal measurement parameters and the threshold value.
For example, the second station receives the threshold parameter set sent by the first station, where the threshold parameter set carries the corresponding relationship between the sector, the wireless signal measurement parameter, and the threshold value shown in table 3, the sector of the second station is sector2, and the RSSI is-45 dBm, so that the second station can determine that the threshold value corresponding to the station is 1000 bytes.
Example four
As shown in fig. 3D. In this embodiment, the first station is an access point AP, and the second station is a non-access station non-AP STA associated with the AP, referred to as STA for short. The AP sends the threshold parameter set and the channel reservation indication information to the STA associated with the AP in a system message Beacon frame or a Probe Response frame sent by the AP. The channel reservation indication information can explicitly notify the STA whether to transmit an RTS frame before transmitting a data frame to the AP.
In this embodiment, the threshold parameter set includes a corresponding relationship between the threshold value and the region information. The unit of the threshold value can adopt bytes or transmission time length.
If the AP sets that the STA needs to send an RTS frame (corresponding bit is set to 1) before sending a data frame to the AP, the STA first determines its RTS threshold according to its own region information, and if the length of the data frame sent to the AP is greater than the RTS threshold, first sends the RTS frame. If the length of the data frame is smaller than the RTS threshold value, the RTS frame does not need to be sent first.
If the AP sets that the STA does not need to send an RTS frame (the corresponding bit is set to 0) before sending the data frame to the AP, the STA may ignore the threshold parameter and not send an RTS frame before sending the data frame to the AP.
EXAMPLE five
In this embodiment, the first station and the second station are both non-AP STAs, and the two stations perform direct connection communication. In this case, the two stations should exchange the threshold parameter sets of their respective RTS frames through the management frame before starting transmission, and the parameter examples and the parameter using methods are the same as those in the previous embodiment and are not described again.
EXAMPLE six
In this embodiment, the first station is an access point AP, and the second station is a non-access station non-AP STA associated with the AP, referred to as STA for short. The AP sends the threshold parameter set to the STA associated with the AP in a system message Beacon frame sent by the AP or a Probe Response frame.
In this embodiment, the threshold parameter set includes a corresponding relationship between a QoS level of the data frame and a threshold value. That is, the QoS class of the data frame corresponds to a certain RTS threshold. The QoS class of the data frame may be a priority of a traffic flow or an Access category (Access category) to which the data belongs.
Taking access categories as an example, there are four types of access categories in the prior art, which are: AC-BK (Background), AC-BE (Best effort), AC-VO (Voice), and AC-VI (Video). The frame lengths of data frames with different access categories may be different and therefore the RTS threshold may be set separately. The following is an example of a table of threshold parameters for threshold values for data QoS levels.
Before the STA sends the data frame to the AP, a corresponding RTS threshold value is determined according to the QoS grade of the data frame to be sent, when the length of the data frame exceeds the threshold value, the RTS frame is sent firstly, otherwise, the data frame is sent directly.
EXAMPLE seven
In this embodiment, the first station is an access point AP, and the second station is a non-access station non-AP STA associated with the AP, referred to as STA for short. And the AP sends the threshold parameter set to the STA associated with the AP in a system message Beacon frame sent by the AP.
In this embodiment, the threshold parameter level includes a threshold value when the STA sends the RTS frame to the AP, and explicitly notifies the STA whether to send the RTS frame before sending the data frame to the AP.
If the AP sets that the STA needs to send an RTS frame before sending the data frame to the AP (the corresponding bit is set to be 1), if the length of the data frame sent by the STA to the AP is greater than an RTS threshold value, the RTS frame is sent firstly. If the length of the data frame is smaller than the RTS threshold value, the RTS frame does not need to be sent first.
If the AP sets that the STA does not need to send an RTS frame (the corresponding bit is set to 0) before sending the data frame to the AP, the STA may ignore the threshold parameter and not send an RTS frame before sending the data frame to the AP.
Example eight
In this embodiment, 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 set of region information includes one or more region information. The area information is a sector to which the STA belongs, or wireless measurement parameters of the STA, or a sector and the wireless measurement parameters.
The STA confirms whether channel reservation needs to be executed according to the channel reservation indication information carried by the threshold parameter set and the first area information set; wherein when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the area information of the second station belongs to the first area information set, it is determined that channel reservation needs to be performed; otherwise, confirming that the channel reservation does not need to be executed;
for example, when the channel reservation indication information indicates that the second station transmits the channel reservation request frame, if the area information in the first area information set is a sector, the STA determines whether the sector belongs to a sector notified by the first area information set, and if so, determines that the channel reservation needs to be performed, and performs the channel reservation before transmitting the data frame; under the condition that the area information in the first area information set is the wireless measurement parameter, the STA judges whether the wireless measurement parameter of the STA belongs to the wireless measurement parameter notified by the first area information set, if so, the STA confirms that the channel reservation needs to be executed, and executes the channel reservation before sending the data frame; if the area information in the first area information set is the sector and the wireless measurement parameter, the STA judges whether the own sector belongs to the sector notified by the first area information set and judges whether the own wireless measurement parameter belongs to the wireless measurement parameter notified by the first area information set, and if both are yes, it is determined that the channel reservation needs to be performed, and the channel reservation is performed before the data frame is transmitted. In another example, in the case where the area information in the first area information set is a sector and a wireless measurement parameter, the STA determines whether or not its own sector belongs to a sector notified by the first area information set and determines whether or not its own wireless measurement parameter belongs to a wireless measurement parameter notified by the first area information set, and if either one of them is yes, confirms that channel reservation needs to be performed, and performs channel reservation before transmitting a data frame.
In the embodiment of the present invention, performing channel reservation before transmitting a data frame includes: when needing to send data frames to the AP, the STA judges whether the length of the data frames is larger than a threshold value; under the condition that the value is larger than the threshold value, sending a channel reservation request frame, receiving a response frame corresponding to the channel reservation request frame replied by the AP, and sending a data frame to the AP after receiving the response frame; and transmitting the data frame to the AP under the condition that the data frame is less than or equal to the threshold value.
After the AP notifies the area information in the threshold parameter set, when the STA determines that the STA belongs to the notified area and the channel reservation indication information indicates that the STA needs to send an RTS frame before sending a data frame, the STA determines whether to send the RTS frame according to a threshold set by the STA. When the length of the data frame is larger than the threshold value set by the user, the RTS frame is sent firstly 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 send the RTS frame, the STA ignores the threshold value set by the STA and does not need to send the RTS frame.
Example nine
In this embodiment, the threshold parameter set sent by the AP to the associated STA includes channel reservation indication information and a first QoS class information set, where the first QoS class information set includes one or more QoS classes. The QoS level of the data frame is the same as that described in the sixth embodiment.
When the STA judges that the data frame to be sent belongs to the notified QoS level and the channel reservation indication information indicates that the STA needs to send the RTS frame before sending the data frame, the STA judges whether to send the RTS frame according to a threshold value set by the STA per se. When the length of the data frame is larger than the threshold value set by the user, the RTS frame is sent firstly 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 send the RTS frame, the STA ignores the threshold value set by the STA and does not need to send the RTS frame.
In the above embodiments, the first station is an AP, the second station is a non-AP STA associated with the AP, and the non-AP STA is referred to as an STA for short.
Based on the same or similar concept as the above embodiments, an embodiment of the present invention further provides a data transmission apparatus, which is disposed on an AP, and referring to fig. 4, the data transmission apparatus provided by the present invention includes:
a threshold parameter set sending unit 10, configured to send a threshold parameter set, where the threshold parameter set carries related information that informs a second station to send a channel reservation request frame;
a receiving unit 20, configured to receive a channel reservation request frame sent by a second station;
a response frame transmitting unit 30, configured to transmit 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.
In this embodiment of the present invention, 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 transmits the channel reservation request frame;
channel reservation indication information and a first set of region information;
channel reservation indication information and a first set of QoS levels.
In this embodiment of the present invention, the threshold parameter set sent by the threshold parameter set sending unit 10 includes at least one of the following contents:
a threshold value when the second station sends a channel reservation request frame to the first station;
the corresponding relation between the area information and the threshold value;
and the corresponding relation between the QoS grade of the data frame and the threshold value.
In this embodiment of the present invention, the area information includes at least one of the following information:
a sector to which the second site belongs;
the wireless signal measures a parameter.
In this embodiment of the present invention, the threshold parameter set sent by the threshold parameter set sending unit 10 further includes:
the effective time length; wherein the effective time length is used for informing the second station that channel reservation needs to be performed before the data frame is transmitted within the effective time length.
In an embodiment of the present invention, the radio signal measurement parameter includes at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a Received Signal Strength Indication (RSSI) of the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
Based on the same or similar concept as the above embodiment, an embodiment of the present invention further provides a data transmission apparatus, which is disposed on a non-access point station STA, and referring to fig. 5, the data transmission apparatus provided by the present invention includes:
a threshold parameter set receiving unit 50, configured to receive a threshold parameter set sent by a first station;
a channel reservation unit 60, configured to send a channel reservation request frame according to information carried in the threshold parameter set when a data frame needs to be sent;
a data frame transmitting unit 70, configured to transmit the data frame after receiving the response frame corresponding to the channel reservation request frame.
In the embodiment of the present invention, the first and second substrates,
the channel reservation unit 60 comprises a threshold value judgment module 61, a reservation request frame sending module 62 and a response frame receiving module 63;
the threshold value judging module 61 is configured to judge 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 a channel reservation request frame sent by a first station;
the data transmission apparatus further includes:
a channel reservation confirming unit 80, configured to confirm whether channel reservation needs to be executed according to information carried by the threshold parameter set; when confirming that the channel reservation needs to be executed, informing a channel reservation unit to execute the channel reservation;
when it is confirmed that the channel reservation does not need to be performed, the data frame transmission unit is notified to transmit the data frame.
In this embodiment of the present invention, the channel reservation confirming unit 80 includes at least one of the following modules:
a first confirming module 81, configured to confirm whether channel reservation needs to be performed according to channel reservation indication information carried in the threshold parameter set; wherein the channel reservation indication information is used to indicate whether the second station transmits the channel reservation request frame;
when the channel reservation indication information indicates that the second station sends the channel reservation request frame, confirming that channel reservation needs to be executed; confirming that channel reservation does not need to be executed when the channel reservation indication information indicates that the second station does not transmit the channel reservation request frame;
a second confirming module 82, configured to confirm whether channel reservation needs to be performed according to the channel reservation indication information and the first area information set carried by the threshold parameter set;
confirming that channel reservation needs to be performed when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the area information of the second station belongs to the first area information set; otherwise, confirming that the channel reservation does not need to be executed;
a third confirming module 83, configured to confirm whether channel reservation needs to be executed according to the channel reservation indication information carried in the threshold parameter set and the first QoS class set;
when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the QoS level of the data frame to be transmitted belongs to the first QoS level set, confirming that channel reservation needs to be executed; otherwise, it is confirmed that the channel reservation does not need to be performed.
In this embodiment of the present invention, the channel reservation unit 60 further includes:
the threshold value obtaining module 64 is configured to obtain a threshold value corresponding to the second station according to the threshold parameter set.
In this embodiment of the present invention, the threshold parameter set includes: a threshold value when the second station sends a channel reservation request frame to the first station;
the threshold value obtaining module 64 includes:
the first threshold value obtaining sub-module 641 is configured to read the threshold values in the threshold parameter set, and use the read threshold values as the threshold values of the second station.
In the embodiment of the invention, the threshold parameter set comprises the corresponding relation between the area information and the threshold value;
the threshold value acquisition module comprises:
the second threshold value obtaining sub-module 642 is configured to obtain the threshold value of the second site according to the correspondence between the area information in the threshold parameter set and the threshold value and the area information of the second site;
the region information includes at least one of the following information:
a sector to which the second site belongs;
a wireless signal measurement parameter;
under the condition that the region information includes the sector to which the second site belongs, the second threshold value obtaining sub-module 642 is configured to obtain the threshold value corresponding to the second site according to the sector to which the second site belongs and the correspondence between each sector and the threshold value;
under the condition that the regional information includes the wireless signal measurement parameter, the second threshold acquisition sub-module 642 is configured to acquire the threshold corresponding to the second site according to the wireless signal measurement parameter corresponding to the second site and the corresponding relationship between the wireless signal measurement parameter and the threshold;
under the condition that the area information includes the sector to which the second site belongs and the radio signal measurement parameter, the second threshold value obtaining sub-module 642 is configured to obtain the threshold value corresponding to the second site according to the sector and the radio signal measurement parameter corresponding to the second site and the corresponding relationship between the sector, the radio signal measurement parameter, and the threshold value.
In the embodiment of the invention, the threshold parameter set comprises the corresponding relation between the QoS grade and the threshold value;
the threshold value acquisition module comprises:
the third threshold obtaining sub-module 643, configured to obtain the threshold corresponding to the second station according to the QoS class corresponding to the second station and the corresponding relationship between the QoS class and the threshold.
In an embodiment of the present invention, the radio signal measurement parameter includes at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a received signal strength indication RSSI corresponding to the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
In the embodiment of the present invention, the threshold parameter set further includes an effective time length; wherein,
the channel reservation unit 60 further includes a timing module (not shown in the figure) configured to start timing from the receiving end time of the radio frame carrying the threshold parameter set for the effective time length; and the channel reservation unit executes channel reservation before sending the data frame according to the information carried by the threshold parameter set in the effective time length.
It should be noted that the above-mentioned embodiments are only for facilitating the understanding of those skilled in the art, and are not intended to limit the scope of the present invention, and any obvious substitutions, modifications, etc. made by those skilled in the art without departing from the inventive concept of the present invention are within the scope of the present invention.
Claims (26)
1. A method of data transmission, the method comprising:
a first site sends a threshold parameter set to a second site, wherein the threshold parameter set carries related information for informing the second site to send a channel reservation request frame;
a first station receives a channel reservation request frame sent by a second station;
the first station sends a response frame corresponding to the channel reservation request frame to the second station;
a first station receives a data frame sent by a second station;
wherein, the threshold parameter set is used to instruct the second station to send the threshold value of the channel reservation request frame to the first station;
the unit of the threshold value is the transmission time length;
the threshold parameter set comprises any one of the following information:
channel reservation indication information and a first set of region information;
channel reservation indication information and a first set of QoS levels;
the threshold parameter set comprises at least one of the following:
the corresponding relation between the area information and the threshold value;
and the corresponding relation between the QoS grade of the data frame and the threshold value.
2. The data transmission method according to claim 1,
the region information includes at least one of the following information:
a sector to which the second site belongs;
the wireless signal measures a parameter.
3. The data transmission method according to claim 2, wherein the radio signal measurement parameter comprises at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a Received Signal Strength Indication (RSSI) of the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
4. The data transmission method according to any one of claims 1 to 3, wherein the threshold parameter set further comprises:
the effective time length; wherein the effective time length is used for informing the second station that channel reservation needs to be performed before the data frame is transmitted within the effective time length.
5. The data transmission method according to claim 1, wherein the first station is an access point or a station in direct communication with the second station.
6. A method of data transmission, the method comprising:
the second station receives the threshold parameter set sent by the first station;
when a data frame needs to be sent, a channel reservation request frame is sent according to the information carried by the threshold parameter set;
after receiving a response frame corresponding to the channel reservation request frame, sending the data frame;
wherein, the threshold parameter set is used to instruct the second station to send the threshold value of the channel reservation request frame to the first station;
the unit of the threshold value is the transmission time length;
the threshold parameter set comprises any one of the following information:
channel reservation indication information and a first set of region information;
channel reservation indication information and a first set of QoS levels;
the threshold parameter set comprises at least one of the following:
the corresponding relation between the area information and the threshold value;
the corresponding relation between the QoS grade of the data frame and the threshold value;
before the transmitting of the channel reservation request frame, the data transmission method further includes:
and the second station acquires the threshold value corresponding to the second station according to the threshold parameter set.
7. The data transmission method according to claim 6,
before sending the channel reservation request frame according to the information carried by the threshold parameter set, the data transmission method further includes:
confirming whether channel reservation needs to be executed or not according to the information carried by the threshold parameter set;
when confirming that the channel reservation needs to be executed, executing the step of sending the channel reservation request frame when the length of the data frame is larger than a threshold value; when the length of the data frame is smaller than a threshold value, executing the step of sending the data frame;
and when it is determined that the channel reservation does not need to be performed, performing the step of transmitting the data frame.
8. The data transmission method according to claim 7,
and according to the information carried by the threshold parameter set, determining whether the channel reservation needs to be executed according to any one of the following modes:
the first method is as follows:
confirming whether channel reservation needs to be executed according to channel reservation indication information carried by a threshold parameter set; wherein the channel reservation indication information is used to indicate whether the second station transmits the channel reservation request frame;
when the channel reservation indication information indicates that the second station sends the channel reservation request frame, confirming that channel reservation needs to be executed; confirming that channel reservation does not need to be executed when the channel reservation indication information indicates that the second station does not transmit the channel reservation request frame;
the second method comprises the following steps:
confirming whether channel reservation needs to be executed or not according to channel reservation indication information carried by a threshold parameter set and a first area information set;
confirming that channel reservation needs to be performed when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the area information of the second station belongs to the first area information set; otherwise, confirming that the channel reservation does not need to be executed;
the third method comprises the following steps:
confirming whether channel reservation needs to be executed or not according to channel reservation indication information carried by a threshold parameter set and a first QoS level set;
when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the QoS level of the data frame to be transmitted belongs to the first QoS level set, confirming that channel reservation needs to be executed; otherwise, it is confirmed that the channel reservation does not need to be performed.
9. The data transmission method of claim 6, wherein the threshold parameter set comprises: a threshold value when the second station sends a channel reservation request frame to the first station;
the obtaining of the threshold value corresponding to the second station according to the threshold parameter set includes:
and reading the threshold value in the threshold parameter set, and taking the read threshold value as the threshold value of the second site.
10. The data transmission method according to claim 6, wherein the threshold parameter set includes a correspondence between area information and a threshold value;
the region information includes at least one of the following information:
a sector to which the second site belongs;
a wireless signal measurement parameter;
in a case that the area information includes a sector to which the second station belongs, the obtaining, according to the threshold parameter set, a threshold value corresponding to the second station includes:
acquiring a threshold value corresponding to the second site according to the sector to which the second site belongs and the corresponding relation between each sector and the threshold value;
under the condition that the area information includes the wireless signal measurement parameter, the obtaining the threshold value corresponding to the second station according to the threshold parameter set includes:
acquiring a threshold value corresponding to the second station according to the wireless signal measurement parameter corresponding to the second station and the corresponding relation between the wireless signal measurement parameter and the threshold value;
under the condition that the region information includes the sector to which the second station belongs and the radio signal measurement parameter, the obtaining the threshold value corresponding to the second station according to the threshold parameter set includes:
and acquiring a threshold value corresponding to the second site according to the sector and the wireless signal measurement parameter corresponding to the second site and the corresponding relation between the sector and the wireless signal measurement parameter and the threshold value.
11. The data transmission method according to claim 6,
the threshold parameter set comprises the corresponding relation between the QoS grade and the threshold value;
under the condition that the threshold parameter set comprises the corresponding relation between the QoS grade and the threshold value, the obtaining the threshold value corresponding to the second station according to the threshold parameter set comprises:
and acquiring the threshold corresponding to the second site according to the QoS grade corresponding to the second site and the corresponding relation between the QoS grade and the threshold.
12. The data transmission method according to claim 10, wherein the radio signal measurement parameter comprises at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a received signal strength indication RSSI corresponding to the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
13. The data transmission method of claim 6, wherein the threshold parameter set further comprises an effective time length; according to the effective time length, the second station starts timing from the receiving end time of the wireless frame carrying the threshold parameter set;
and in the effective time length, the second station executes channel reservation before sending the data frame according to the information carried by the threshold parameter set.
14. The data transmission method according to claim 6, wherein the second station is a station associated with the first station, or wherein the second station is a station in direct communication with the first station.
15. A data transmission apparatus disposed on an access point AP, the apparatus comprising:
a threshold parameter set sending unit, configured to send a threshold parameter set, where the threshold parameter set carries related information that informs a second station to send a channel reservation request frame;
a receiving unit, configured to receive a channel reservation request frame sent by a second station;
a response frame transmitting unit, configured to transmit 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 is used for indicating the threshold value of a channel reservation request frame sent by the second station to the first station;
the unit of the threshold value is the transmission time length;
the threshold parameter set sent by the threshold parameter set sending unit includes any one of the following information:
channel reservation indication information and a first set of region information;
channel reservation indication information and a first set of QoS levels;
the threshold parameter set sent by the threshold parameter set sending unit includes at least one of the following:
the corresponding relation between the area information and the threshold value;
and the corresponding relation between the QoS grade of the data frame and the threshold value.
16. The data transmission apparatus of claim 15,
the region information includes at least one of the following information:
a sector to which the second site belongs;
the wireless signal measures a parameter.
17. The data transmission apparatus of claim 15, wherein the threshold parameter set transmitted by the threshold parameter set transmission unit further comprises:
the effective time length; wherein the effective time length is used for informing the second station that channel reservation needs to be performed before the data frame is transmitted within the effective time length.
18. The data transmission apparatus of claim 16, wherein the radio signal measurement parameter comprises at least one of:
the receiving power of the second station when receiving the signal sent by the first station;
a Received Signal Strength Indication (RSSI) of the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
19. A data transmission apparatus disposed on a non-access point Station (STA), the apparatus comprising:
a threshold parameter set receiving unit, configured to receive a threshold parameter set sent by a first station;
the channel reservation unit is used for sending a channel reservation request frame according to the information carried by the threshold parameter set when the data frame needs to be sent;
a data frame transmitting unit, configured to transmit the data frame after receiving a response frame corresponding to the channel reservation request frame;
the threshold parameter set is used for indicating a threshold value of a channel reservation request frame sent by a second station to the first station;
the unit of the threshold value is the transmission time length;
the threshold parameter set comprises any one of the following information:
channel reservation indication information and a first set of region information;
channel reservation indication information and a first set of QoS levels;
the threshold parameter set comprises at least one of the following:
the corresponding relation between the area information and the threshold value;
the corresponding relation between the QoS grade of the data frame and the threshold value;
the channel reservation unit further includes:
and the threshold value acquisition module is used for acquiring the threshold value corresponding to the second station according to the threshold parameter set.
20. The data transmission apparatus of claim 19,
the channel reservation unit comprises a threshold value judgment module, a reservation request frame sending module and a response frame receiving module;
the threshold value judging module is used for judging whether the length of the data frame is greater than a threshold value;
the reservation request frame sending module is used for sending a channel reservation request frame when the length of the data frame is greater than a threshold value;
the response frame receiving module is used for receiving a response frame corresponding to a channel reservation request frame sent by a first station;
the data transmission apparatus further includes:
a channel reservation confirming unit, configured to confirm whether channel reservation needs to be executed according to information carried by the threshold parameter set; when confirming that the channel reservation needs to be executed, informing a channel reservation unit to execute the channel reservation;
when it is confirmed that the channel reservation does not need to be performed, the data frame transmission unit is notified to transmit the data frame.
21. The data transmission apparatus of claim 20,
the channel reservation confirmation unit includes at least one of the following modules:
the first confirming module is used for confirming whether channel reservation needs to be executed or not according to the channel reservation indication information carried by the threshold parameter set; wherein the channel reservation indication information is used to indicate whether the second station transmits the channel reservation request frame;
when the channel reservation indication information indicates that the second station sends the channel reservation request frame, confirming that channel reservation needs to be executed; confirming that channel reservation does not need to be executed when the channel reservation indication information indicates that the second station does not transmit the channel reservation request frame;
the second confirming module is used for confirming whether channel reservation needs to be executed or not according to the channel reservation indication information carried by the threshold parameter set and the first area information set;
confirming that channel reservation needs to be performed when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the area information of the second station belongs to the first area information set; otherwise, confirming that the channel reservation does not need to be executed;
a third confirming module, configured to confirm whether channel reservation needs to be performed according to the channel reservation indication information carried by the threshold parameter set and the first QoS class set;
when the channel reservation indication information indicates that the second station transmits the channel reservation request frame and the QoS level of the data frame to be transmitted belongs to the first QoS level set, confirming that channel reservation needs to be executed; otherwise, it is confirmed that the channel reservation does not need to be performed.
22. The data transmission apparatus of claim 19, wherein the threshold parameter set comprises: a threshold value when the second station sends a channel reservation request frame to the first station;
the threshold value acquisition module comprises:
and the first threshold value acquisition sub-module is used for reading the threshold values in the threshold parameter set and taking the read threshold values as the threshold values of the second station.
23. The data transmission apparatus according to claim 19, wherein the threshold parameter set includes a correspondence between area information and a threshold value;
the threshold value acquisition module comprises:
the second threshold value obtaining submodule is used for obtaining the threshold value of the second station according to the corresponding relation between the area information in the threshold parameter set and the threshold value and the area information of the second station;
the region information includes at least one of the following information:
a sector to which the second site belongs;
a wireless signal measurement parameter;
the second threshold value obtaining submodule is used for obtaining the threshold value corresponding to the second site according to the sector to which the second site belongs and the corresponding relation between each sector and the threshold value under the condition that the area information comprises the sector to which the second site belongs;
under the condition that the regional information comprises the wireless signal measurement parameter, the second threshold value acquisition sub-module is used for acquiring the threshold value corresponding to the second site according to the wireless signal measurement parameter corresponding to the second site and the corresponding relation between the wireless signal measurement parameter and the threshold value;
and under the condition that the area information comprises the sector to which the second site belongs and the wireless signal measurement parameter, the second threshold value acquisition submodule is used for acquiring the threshold value corresponding to the second site according to the sector and the wireless signal measurement parameter corresponding to the second site and the corresponding relation between the sector, the wireless signal measurement parameter and the threshold value.
24. The data transmission apparatus of claim 19,
the threshold parameter set comprises the corresponding relation between the QoS grade and the threshold value;
the threshold value acquisition module comprises:
and the third threshold obtaining submodule is used for obtaining the threshold corresponding to the second site according to the QoS grade corresponding to the second site and the corresponding relation between the QoS grade and the threshold.
25. The data transmission apparatus of claim 23, wherein the radio signal measurement parameter comprises at least one of the following data:
the receiving power of the second station when receiving the signal sent by the first station;
a received signal strength indication RSSI corresponding to the second station;
a functional relationship with the transmission power of the first station, the RSSI of the second station and the transmission power of the second station as parameters;
packet error rate of the second station over a predetermined time period.
26. The data transmission apparatus of claim 19, wherein the threshold parameter set further comprises an active time length; wherein,
the channel reservation unit further comprises a timing module, configured to start timing from the radio frame reception end time carrying the threshold parameter set according to the effective time length; and the channel reservation unit executes channel reservation before sending the data frame according to the information carried by the threshold parameter set in the effective time length.
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| CN108882310B (en) * | 2018-08-22 | 2023-05-02 | 深圳全志在线有限公司 | Method, device and medium for determining operation state of RTS/CTS mechanism |
| CN115484687A (en) * | 2021-05-31 | 2022-12-16 | 华为技术有限公司 | Communication method and device |
| CN113747503B (en) * | 2021-08-05 | 2024-06-25 | 维沃移动通信有限公司 | Data transmission method and device and transmitting terminal equipment |
| CN116133147A (en) * | 2021-11-12 | 2023-05-16 | 华为技术有限公司 | Data transmission method and device, storage medium and program product |
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