WO2016070438A1

WO2016070438A1 - Node device, system, data transmission method and data receiving method

Info

Publication number: WO2016070438A1
Application number: PCT/CN2014/090658
Authority: WO
Inventors: 官磊; 马莎; 杨美英
Original assignee: 华为技术有限公司
Priority date: 2014-11-07
Filing date: 2014-11-07
Publication date: 2016-05-12
Also published as: CN105850216A; CN105850216B

Abstract

Disclosed are a node device, system, data transmission method and data receiving method. The device comprises: a transmission module, for sending a requesting to send (RTS) frame to a second node on a channel; a receiving module, for receiving from the second node a clearing to send (CTS) frame within a preset first time interval after the transmission module transmits the RTS frame, the first time interval being greater than one short inter-frame spacing (SIFS) time period; and a determination module, for determining a time interval indicated by a first silence time window included in the CTS frame received by the receiving module. The transmission module is further used to transmit data to the second node on the channel within the time interval indicated by the first silence time window included in the CTS and determined by the determination module. The present invention increases the probability of monitoring an idle channel.

Description

Node device, system, method for transmitting data and method for receiving data

Technical field

The present invention relates to the field of communications technologies, and in particular, to a node device, a system, a method for transmitting data, and a method for receiving data.

Background technique

As the spectrum resources become more and more scarce, the service capability of Long Term Evolution (LTE) systems based on licensed spectrum is also limited. Therefore, the long-term evolution of unlicensed spectrum (U-LTE, Unlicensed LTE) system is concerned. The degree is increasing. However, today's wireless fidelity (WiFi) network technology has also begun to use a large number of unlicensed spectrum to enhance its service capabilities, and there is no ideal network planning between U-LTE and WiFi, so that each of the two network nodes It is easy to become a neighboring node. If two neighboring nodes send data at the same time, it will cause interference to the other party, and any node cannot serve the user equipment (UE, User Experience).

Therefore, the coexistence problem of the long-term evolution U-LTE node of the unlicensed spectrum and the node of the WiFi is solved by formulating the rule of sending and monitoring first. For example, before the source node sends data to the destination node, it first monitors whether the channel is occupied by the neighboring node. If the channel is not occupied by the neighboring node, the source node can send data to the destination node on the channel. However, if the distance between the source node and another node is far, the source node cannot listen to another node sending data to the destination node, and the source node mistakenly believes that the channel is idle, and then sends data to the destination node, so that the destination node receives To interference, which affects the quality of service of the source node.

The above technical problem is solved in the prior art by a request to send/clear to send (RTS/CTS) protocol. The source node sends an RTS frame to all nodes in the coverage area, and all non-destination nodes that receive the RTS frame stop data exchange, and the destination node sends a CTS frame to the source node to indicate that it is ready to receive information, and then enters the data transmission process. . Since the time when the destination node receives the RTS frame and the time when the destination node sends the CTS frame are different from the short interframe space (SIFS, Short Inter Frame Spacing), the SIFS is equal to the node needs to switch from the transmitting state to the receiving state and can correctly decode. The time, or the time required to change from the receiving state to the transmitting state, the data packet transmitted after the end of SIFS may include a CTS frame. Therefore, after receiving the RTS frame, the destination node uses the duration of the SIFS to monitor the channel. If the channel is monitored, it is idle. The destination node sends a CTS frame to the source node; if the channel is monitored to be busy, the CTS frame is not sent. However, since the duration of one SIFS is about 10 microseconds and the listening time is short, the probability of listening to the channel idle is relatively low, which reduces the probability of transmitting the CTS frame, and the quality of service of the source node is degraded.

Summary of the invention

The present invention provides a node device, a system, a method for transmitting data, and a method for receiving data, which can increase the probability that the listening channel is idle.

In order to solve the above technical problem, the first aspect of the present invention provides a node device, where the node device includes:

a sending module, configured to send a request to send a RTS frame to the second node on the channel;

a receiving module, configured to receive a clear sending CTS frame from the second node in a preset first time interval after the transmitting module sends the RTS frame, where the first time interval is greater than one short frame Interval time

a determining module, configured to determine a time interval indicated by a first quiet time window included in the CTS frame received by the receiving module;

The sending module is further configured to send data to the second node on the channel within a time interval indicated by a first quiet time window included in the CTS frame determined by the determining module.

With reference to the implementation of the first aspect of the present invention, in a first possible implementation manner of the first aspect, the RTS frame includes a second quiet time window and node indication information, where the second silent time window is used After the receiving module receives the CTS frame corresponding to the RTS frame, the sending module can directly send a data to the second node at the cutoff time of the channel without listening to the channel, the node The indication information is used to indicate the second node.

With reference to the first possible implementation manner of the first aspect of the present invention, in a second possible implementation manner of the first aspect of the present invention, the first silent time window is performed by the second node according to the second silent The time window is determined.

With reference to the implementation of the first aspect of the present invention, in a third possible implementation manner of the first aspect of the present disclosure, the CTS frame further includes the identifier information of the node device, and the identifier information of the node device is used to enable The sending module sends data to the second node.

With reference to the first possible implementation manner of the first aspect of the present invention, in a fourth possible implementation manner of the first aspect of the present disclosure, the sending module further sends the RTS frame to a third node, so that the After determining, by the node indication information, that the node indicated by the node indication information is not the third node, the third node is silent in a preset second time interval, and the second time interval is smaller than the second time interval. The time interval indicated by the silent time window.

A second aspect of the present invention provides a node device, the node device comprising a receiver, a transmitter, and a processor, wherein:

The transmitter is configured to send a request to send a RTS frame to a second node on a channel;

The receiver, configured to receive a clear transmission CTS frame from the second node within a preset first time interval after the transmitter sends the RTS frame, where the first time interval is greater than one short The time between frames;

The processor, configured to determine a time interval indicated by a first quiet time window included in the CTS frame received by the receiver;

The transmitter is further configured to send data to the second node on the channel within a time interval indicated by a first quiet time window included in the CTS frame determined by the processor.

With reference to the implementation of the second aspect of the present invention, in a first possible implementation manner of the second aspect, the RTS frame includes a second quiet time window and node indication information, where the second silent time window is used. And indicating, after receiving the CTS frame corresponding to the RTS frame, the processor can not listen to the channel and the transmitter directly sends a data to the second node on the channel. The node indication information is used to indicate the second node.

With reference to the first possible implementation manner of the second aspect of the present invention, in a second possible implementation manner of the second aspect of the present invention, the first silent time window is performed by the second node according to the second silent The time window is determined.

With reference to the implementation of the second aspect of the present invention, in a third possible implementation manner of the second aspect of the present invention, the CTS frame further includes identifier information of the node device, and the identifier information of the node device is used to enable The transmitter transmits data to the second node.

In conjunction with the first possible embodiment of the second aspect of the invention, the fourth aspect of the second aspect of the invention In a possible implementation manner, the transmitter further sends the RTS frame to a third node, so that the third node determines, according to the node indication information, that the node indicated by the node indication information is not the third After the node, it is silent in a preset second time interval, and the second time interval is smaller than the time interval indicated by the second silent time window.

A third aspect of the present invention provides a node device, where the node device includes:

a receiving module, configured to receive, on a channel, a request sent by the first node to send an RTS frame;

a monitoring module, configured to monitor the channel and determine that the channel is idle, in a third time interval after the receiving module receives the RTS frame sent by the first node, the third time The interval is greater than the interval between short frames;

a sending module, configured to determine, according to the listening module, that the channel is idle, and send a clear sending CTS frame to the first node;

The receiving module is further configured to receive data sent by the first node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.

With the implementation of the third aspect of the present invention, the RTS frame includes a second quiet time window and node indication information, where the second quiet time window is used to indicate that the first node receives the CTS corresponding to the RTS frame. After the frame, the cutoff time of the data can be directly sent to the receiving module on the channel without listening to the channel, and the node indication information is used to indicate the node device.

With reference to the first possible implementation manner of the third aspect of the present invention, in a second possible implementation manner of the third aspect of the present invention, the first quiet time window is performed by the node device according to the second quiet time The window is OK.

In conjunction with the first possible implementation manner of the third aspect of the present invention, in a third possible implementation manner of the third aspect of the present invention, the power saving device further includes:

And a determining module, configured to determine, according to the node indication information, that the node indicated by the node indication information is the node device.

With reference to the implementation of the third aspect of the present invention, in a fourth possible implementation manner of the third aspect, the CTS frame further includes the identifier information of the first node, and the identifier information of the first node is used by The first node is caused to send data to the receiving module.

With the implementation of the third aspect of the present invention, in a fifth possible implementation manner of the third aspect, the sending module further sends the CTS frame to a third node, so that the third node is in the The time interval indicated by the first silence time window included in the CTS frame is silent.

A fourth aspect of the present invention provides a node device, including a receiver, a transmitter, and a processor, where:

The receiver is configured to receive, on a channel, a request sent by the first node to send an RTS frame;

The processor, configured to monitor the channel and determine that the channel is idle, in a preset third time interval after the receiver receives the RTS frame sent by the first node, where The time interval between three time intervals is greater than one short frame interval;

The transmitter is configured to determine, according to the processor, that the channel is idle, and send a clear sending CTS frame to the first node;

The receiver is further configured to receive data sent by the first node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.

With reference to the implementation of the fourth aspect of the present invention, in a first possible implementation manner of the fourth aspect, the RTS frame includes a second quiet time window and node indication information, where the second silent time window is used. Determining, by the first node, a deadline for transmitting data directly to the receiver on the channel without receiving the CTS frame corresponding to the RTS frame, the node indication information being used for Indicate the node device.

With reference to the first possible implementation manner of the fourth aspect of the present invention, in a second possible implementation manner of the fourth aspect of the present invention, the first quiet time window is performed by the processor according to the second quiet time The window is OK.

With reference to the first possible implementation manner of the fourth aspect of the present invention, in a third possible implementation manner of the fourth aspect of the present invention, the processor is further configured to determine, according to the node indication information, the node indication The node indicated by the information is the node device.

With reference to the implementation of the fourth aspect of the present invention, in a fourth possible implementation manner of the fourth aspect, the CTS frame further includes the identifier information of the first node, and the identifier information of the first node is used by The first node is caused to transmit data to the receiver.

With the implementation of the fourth aspect of the present invention, in a fifth possible implementation manner of the fourth aspect of the present invention, the transmitter further sends the CTS frame to a third node, so that the third node is in the The time interval indicated by the first silence time window included in the CTS frame is silent.

A fifth aspect of the present invention provides a node device, where the node device includes:

a receiving module, configured to receive, on a channel, a request sent by the first node to send an RTS frame, where the RTS frame includes a second silent time window;

a monitoring module, configured to monitor the channel and determine that the channel is idle after waiting for a preset second time interval, where the second time interval is smaller than a time interval indicated by the second silent time window;

And a sending module, configured to determine, according to the listening module, that the channel is idle, and send data to a node that needs to be served by the node device by using the channel.

With reference to the implementation manner of the fifth aspect of the present invention, in a first possible implementation manner of the fifth aspect, the second quiet time window is used to indicate that the first node receives the RTS frame corresponding to After clearing the CTS frame, the deadline for transmitting data to the second node directly on the channel without listening to the channel can be cleared.

With the implementation of the fifth aspect of the present invention, in a second possible implementation manner of the fifth aspect, the RTS frame further includes node indication information, where the node indication information is used to indicate the second node;

The node device further includes:

And a determining module, configured to determine, according to the node indication information, that the node indicated by the node indication information is not the node device.

With reference to the first possible implementation manner of the fifth aspect of the present invention, in a third possible implementation manner of the fifth aspect of the present invention, the node device further includes:

a silence module, configured to: when the receiving module receives the CTS frame sent by the second node in the second time interval, the time interval indicated by the first quiet time window included in the CTS frame Within the silence, the first silent time window is determined by the second node according to the second silent time window.

With reference to the third possible implementation manner of the fifth aspect of the present invention, in a fourth possible implementation manner of the fifth aspect of the present invention, the CTS frame further includes identifier information of the first node, where The identification information of a node is used to enable the first node to send data to the second node, so that the silent module determines that the node device is a silent node.

A sixth aspect of the present invention provides a node device, the node device comprising a receiver, a transmitter, and a processor, wherein:

The receiver is configured to receive, on a channel, a request sent by the first node to send an RTS frame, where the RTS frame includes a second silent time window;

The processor is configured to monitor the channel and determine that the channel is idle after waiting for a preset second time interval, where the second time interval is less than a time indicated by the second silent time window interval;

The transmitter is configured to determine, according to the processor, that the channel is idle, and send data to a node that needs to be served by the node device by using the channel.

With reference to the embodiment of the sixth aspect of the present invention, in a first possible implementation manner of the sixth aspect, the second quiet time window is used to indicate that the first node receives the corresponding RTS frame. After clearing the CTS frame, the deadline for transmitting data to the second node directly on the channel without listening to the channel can be cleared.

With reference to the implementation of the sixth aspect of the present invention, in a second possible implementation manner of the sixth aspect, the RTS frame further includes node indication information, where the node indication information is used to indicate the second node;

And the processor is further configured to determine, according to the node indication information, that the node indicated by the node indication information is not the node device.

With reference to the first possible implementation manner of the sixth aspect of the present invention, in a third possible implementation manner of the sixth aspect of the present invention, the processor is further configured to: if the receiver is in the second time Receiving, in the interval, the CTS frame sent by the second node, and silenced in a time interval indicated by a first quiet time window included in the CTS frame, where the first silent time window is used by the second node Determined according to the second silent time window.

With reference to the third possible implementation manner of the sixth aspect of the present invention, in a fourth possible implementation manner of the sixth aspect, the CTS frame further includes the identifier information of the first node, where the The identification information of a node is used to cause the first node to send data to the second node, so that the processor determines that the node device is a silent node.

The seventh aspect of the present invention provides a system, comprising the node device according to any of the first aspects of the present invention, the node device according to any one of the third aspect, Node device.

An eighth aspect of the present invention provides a method for transmitting data, including:

The first node sends a request to send a RTS frame to the second node on the channel;

Receiving, by the first node, a clear sending CTS frame from the second node in a preset first time interval after sending the RTS frame, where the first time interval is greater than a short interframe space;

Determining, by the first node, a time interval indicated by a first quiet time window included in the CTS frame;

The first node transmits data to the second node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.

With reference to the embodiment of the eighth aspect of the present invention, in a first possible implementation manner of the eighth aspect, the RTS frame includes a second quiet time window and node indication information, where the second silent time window is used. Determining, by the first node, a deadline for transmitting data to the second node directly on the channel after receiving the CTS frame corresponding to the RTS frame, where the node indicates information Instructing the second node.

With reference to the first possible implementation manner of the eighth aspect of the present invention, in a second possible implementation manner of the eighth aspect of the present invention, the first silent time window is performed by the second node according to the second silent The time window is determined.

With reference to the embodiment of the eighth aspect of the present invention, in a third possible implementation manner of the eighth aspect, the CTS frame further includes the identifier information of the first node, and the identifier of the first node The information is for causing the first node to send data to the second node.

With reference to the first possible implementation manner of the eighth aspect of the present invention, in a fourth possible implementation manner of the eighth aspect, the first node further sends the RTS frame to a third node, so that The third node determines, according to the node indication information, that the node indicated by the node indication information is not the third node, and is silent in a preset second time interval, where the second time interval is smaller than the first time interval. The time interval indicated by the second silent time window.

A ninth aspect of the present invention provides a method for receiving data, including:

Receiving, by the second node, a request sent by the first node to send an RTS frame on the channel;

The second node monitors the channel and determines that the channel is idle in a preset third time interval after receiving the RTS frame sent by the first node, where the third time interval is greater than one short The time between frames;

Sending, by the second node, a clear sending CTS frame to the first node according to determining that the channel is idle;

The second node receives data sent by the first node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.

With the implementation of the ninth aspect of the present invention, in a first possible implementation manner of the ninth aspect, the RTS frame includes a second quiet time window and node indication information, where the second silent time window is used. Determining, by the first node, a deadline for transmitting data to the second node directly on the channel after receiving the CTS frame corresponding to the RTS frame, where the node indicates information Instructing the second node.

With reference to the first possible implementation manner of the ninth aspect of the present invention, in a second possible implementation manner of the ninth aspect of the present invention, the first silent time window is performed by the second node according to the second silent The time window is determined.

With reference to the first possible implementation manner of the ninth aspect of the present invention, in a third possible implementation manner of the ninth aspect of the present invention, the second node, after receiving the request sent by the first node and sending the RTS frame on the channel The method further includes:

Determining, by the second node, the section indicated by the node indication information according to the node indication information The point is the second node.

With the implementation of the ninth aspect of the present invention, in a fourth possible implementation manner of the ninth aspect, the CTS frame further includes the identifier information of the first node, and the identifier information of the first node is used by The first node is caused to send data to the second node.

With the implementation of the ninth aspect of the present invention, in a fifth possible implementation manner of the ninth aspect, the second node further sends the CTS frame to the third node, so that the third node is The time interval indicated by the first silence time window included in the CTS frame is silent.

A tenth aspect of the present invention provides a method for transmitting data, including:

The third node receives, on the channel, a request sent by the first node to send an RTS frame, where the RTS frame includes a second silent time window;

After waiting for a preset second time interval, the third node monitors the channel and determines that the channel is idle, and the second time interval is smaller than a time interval indicated by the second silent time window;

The third node sends data to the node that needs to serve the third node through the channel according to determining that the channel is idle.

With reference to the embodiment of the tenth aspect of the present invention, in a first possible implementation manner of the tenth aspect of the present invention, the second quiet time window is used to indicate that the first node receives the corresponding RTS frame. After clearing the CTS frame, the deadline for transmitting data to the second node directly on the channel without listening to the channel can be cleared.

With the implementation of the tenth aspect of the present invention, in a second possible implementation manner of the tenth aspect of the present invention, the RTS frame further includes node indication information, where the node indication information is used to indicate the second node;

After the third node receives the request sent by the first node to send the RTS frame on the channel, the method further includes:

The third node determines, according to the node indication information, that the node indicated by the node indication information is not the third node.

In conjunction with the first possible embodiment of the tenth aspect of the invention, the third aspect of the tenth aspect of the invention In a possible implementation manner, the method further includes:

And if the third node receives the CTS frame sent by the second node in the second time interval, the third node is at a time indicated by a first quiet time window included in the CTS frame. Silencing within the interval, the first silent time window is determined by the second node according to the second silent time window.

With reference to any one of the possible implementation manners of the third aspect of the tenth aspect of the present invention, in a fourth possible implementation manner of the tenth aspect of the present invention, the CTS frame further includes the identifier information of the first node The identifier information of the first node is used to enable the first node to send data to the second node, so that the third node determines that the third node is a silent node.

According to the present invention, the first node sends a request to send a RTS frame to the second node on the channel; the first node receives the clear transmission CTS frame from the second node within a preset first time interval after transmitting the RTS frame, a time interval is greater than a short interframe space; the first node determines a time interval indicated by a first quiet time window included in the CTS frame; the first node is within a time interval indicated by a first quiet time window included in the CTS frame Transmitting data to the second node on the channel not only improves the probability that the second node listens to the channel idle, but also improves the probability of transmitting the CTS frame and improves the utilization of the channel resources.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic diagram of node interaction in the prior art;

2 is a schematic structural diagram of an embodiment of a first type of node device according to an embodiment of the present invention;

3 is a schematic structural diagram of another embodiment of a first node device according to an embodiment of the present invention;

4 is a schematic structural diagram of an embodiment of a second node device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another embodiment of a second node device according to an embodiment of the present invention; FIG.

6 is a schematic structural diagram of an embodiment of a third node device according to an embodiment of the present invention;

7 is a schematic structural diagram of another embodiment of a third node device according to an embodiment of the present invention;

8 is a schematic structural diagram of a system according to an embodiment of the present invention;

FIG. 9 is a schematic flowchart diagram of a first method for transmitting data according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic flowchart diagram of a method for receiving data according to an embodiment of the present invention; FIG.

11 is a schematic flowchart diagram of a second method for transmitting data according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of an embodiment of a time window of each node device according to an embodiment of the present invention; FIG.

FIG. 13 is a schematic diagram of another embodiment of a time window of each node device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the prior art, as shown in FIG. 1, node 0 serves UE1, node 1 serves UE1 and UE2, and node 0 and node 2 are adjacent nodes. Node 0 first listens to whether the channel is occupied by node 2 before transmitting data to UE1. If the channel is not occupied by node 2, node 0 can send data to UE1 on the channel. However, node 0 and node 1 are far apart from each other. At this time, node 0 does not hear that node 1 transmits data to UE1 on the channel, and node 0 misunderstands that the channel is idle, and then transmits data to UE1, so that UE1 is interfered. Therefore, node 0 first sends an RTS frame to UE1. After receiving the RTS frame, UE1 uses the duration of one SIFS to monitor the channel. If the channel is idle, UE1 sends a CTS frame to node 0; if the channel is busy, it does not send a CTS frame. However, since the duration of one SIFS is about 10 microseconds and the listening time is short, the probability of listening to the channel idle is low, and the probability of transmitting the CTS frame is lowered, resulting in a decrease in the quality of service of the node 0.

Therefore, the embodiment of the invention provides a node device, a system, a method for transmitting data, and a method for receiving data, which can increase the probability that the listening channel is idle.

Referring to FIG. 2, FIG. 2 is a schematic structural diagram of an embodiment of a first node device according to an embodiment of the present invention. The node device involved in FIG. 2 may be defined as a first node, and the second node and the third node may also be node devices. The first node, the second node, and the third node may be a node device that can carry an uplink or downlink data channel and support the RTS/CTS protocol, and can work in an LTE network or a WiFi network, so this embodiment The channels involved are channels on the unlicensed spectrum. In order The description is convenient. As shown in FIG. 12 and FIG. 13, the second node is set as a user equipment, and the other nodes are all set as base stations. In addition, the fourth node N3 in the figure is a node device that the first node N1 cannot monitor. The first node N1, the second node UE, the third node N2, and the fourth node N3 transmit data on the same channel. The details will be described below.

The node device shown in FIG. 2 includes: a sending module 200, a receiving module 210, and a determining module 220.

The sending module 200 is configured to send a request to send a RTS frame to the second node on the channel.

In a specific implementation, the first node N1 sends an RTS frame to the second node UE. The RTS frame includes a second silence time window and node indication information.

In an implementation manner, the second quiet time window is used to indicate that after the receiving module 210 receives the CTS frame corresponding to the RTS frame, the sending module 200 can directly monitor the channel without listening to the channel. a deadline for transmitting data to the second node on the channel, the node indication information being used to indicate the second node. Specifically, the second quiet time window may be used to indicate that the RTS frame is sent from the first node N1, and after receiving the CTS frame corresponding to the RTS frame, the first node N1 can directly listen to the channel and directly to the second node on the channel. The time interval at which the UE ends when data is sent.

Optionally, the node indication information may be an address of the second node UE or an identifier of the second node UE or any information that can identify the second node UE, which is not limited in this embodiment.

Optionally, the node indication information is further used to indicate that the node devices except the second node UE are node devices that need to be silent. If the other node device receives the RTS frame sent by the first node N1, it can determine whether the device needs to be silent according to the node indication information.

Optionally, the timing at which the first node N1 sends the RTS frame may be any one of the following: when the first node N1 sends data to the second node UE, the acknowledgment receiving that is not fed back by the second node UE is not received within a preset time. Information; the capacity of the data sent by the first node N1 to the second node UE exceeds a preset capacity, for example, the channel is occupied by a node that is not monitored by the first node N1 (such as the fourth node N3), and the capacity of the data exceeds the preset. Capacity, which may exceed the capacity that the channel can carry at this time. Therefore, the present embodiment enables the first node N1 to determine the timing of transmitting data to the second node UE.

Optionally, the first node N1 may further send an RTS frame to the second node UE on the channel where the primary carrier is located. The above primary carrier can be on the licensed spectrum. The channel in this embodiment is a channel on the unlicensed spectrum, and the channel on the unlicensed spectrum can carry the secondary carrier in the carrier aggregation technology. The secondary carrier and The primary carrier on the licensed spectrum performs carrier aggregation, so that the second node UE uses carrier aggregation and other power saving devices to transmit data. The first node N1 may not wait for the transmission of data on the channel of the unlicensed spectrum where the secondary carrier is located, that is, after the first node N1 is monitored, it is found that the channel where the secondary carrier is located is always in a busy state, and the spectrum is authorized at this time. The channel on which the primary carrier is located can transmit data, and the first node N1 can select to send an RTS frame to the second node UE on the channel where the primary carrier is located. After receiving the RTS frame sent by the first node N1, the second node UE monitors the channel where the secondary carrier is located in a preset third time interval. When the second node UE finds that the channel where the secondary carrier is located is idle, it can send the CTS frame to the first node N1.

Optionally, the RTS frame may be the signaling indicated by the field placed in the control channel, or may be a single signaling, or may be similar to the RTS frame in the current WI-FI system, and is not used in this embodiment. limited.

The receiving module 210 is configured to receive a clear sending CTS frame from the second node within a preset first time interval after the sending module 200 sends the RTS frame, where the first time interval is greater than one short The time between frames.

In a specific implementation, after the first node N1 sends the RTS frame to the second node UE, the first node N1 sets a first time interval of the preset time interval. During the first time interval, the first node N1 waits to receive the CTS frame sent by the second node UE, and the CTS frame is used to respond to the RTS frame sent by the first node N1, and prompts the first node N1 that the channel is idle, so that the first node N1 Data can be transmitted to the second node UE on the channel. In the prior art, since the second node UE maintains a fixed SIFS duration between receiving the RTS frame and transmitting the CTS frame, the UE1 can only monitor the channel by using the duration of one SIFS. However, since the duration of one SIFS is about 10 microseconds and the listening time is short, the probability of listening to the channel idle is relatively low, and the probability of transmitting the CTS frame is also lowered. In the embodiment of the present invention, the first time interval is set, including the time when the second node UE receives an SIFS duration between the RTS frame and the CTS frame, and the first time interval is at least one unit time, where The unit time can be a SIFS duration or an arbitrarily set time. The first node N1 receives the CTS frame sent by the second node UE in the first time interval, thereby prolonging the time that the first node N1 receives the CTS frame, improving the probability that the first node N1 captures the channel idle, and also improving the channel resource. Utilization.

a determining module 220, configured to determine, by the receiving module 210, the first included in the CTS frame The time interval indicated by the silent time window.

In a specific implementation, if the first node N1 receives the CTS frame sent by the second node UE in the first time interval, it indicates that the second node UE has monitored that the channel is not occupied by other nodes, and the first node N1 determines the CTS frame. The time interval indicated by the first silent time window included.

The sending module 200 is further configured to send data to the second node on the channel within a time interval indicated by a first quiet time window included in the CTS frame determined by the determining module 220.

In a specific implementation, the first node N1 sends data to the second node UE on the channel in the first silent time window, and other nodes (such as the neighboring node, that is, the third node N2, or the hidden node, that is, the fourth node N3) The first silence time window remains silent, and the data transmission to the second node UE is suspended.

In an implementable manner, the first silent time window is determined by the second node according to the second silent time window.

In a specific implementation, the second quiet time window is further configured to enable the second node UE to determine the cutoff time of the first silent time window according to the cutoff time of the second silent time window. The time interval at which the first node N1 can directly transmit data to the second node UE on the channel without listening to the channel is the time interval of the first silent time window set by the second node UE. Specifically, since the first node N1 sends data to the second node UE within a time defined by the second quiet time window, and the second node UE needs to monitor the channel in the second silent time window, the first node is actually The time interval at which N1 sends data is the time interval indicated by the first quiet time window. The cutoff time of the first quiet time window and the cutoff time of the second quiet time window may be the same, or may be different from the duration of the at least one SIFS, which is not limited in this embodiment.

Optionally, the first quiet time window is used to indicate a silent time interval of the node that needs to be silent to receive the CTS frame. Specifically, as shown in FIG. 12, the first node N1 sets the duration of the second quiet time window to be 10 ms, and the first node N1 starts timing after transmitting the RTS frame to the second node UE, if the second node UE is in 4 ms. After the channel is idle, the second node UE sends a CTS frame to the first node N1, and the duration of the first quiet time window is 10-4=6 ms, that is, the first node N1 sends valid data to the second node UE. The time is the duration of the first quiet time window of 6 ms (the time that the first node N1 needs to be separated by one SIFS from receiving the CTS frame to transmitting data, since the duration of one SIFS is 10 microseconds, this embodiment can be ignored).

As an implementation manner, the CTS frame further includes identifier information of the node device, and the identifier information of the node device is used to enable the sending module 200 to send data to the second node. The identifier information of the first node N1 is further used to indicate that the CTS frame sent by the second node UE corresponds to the RTS frame sent by the first node N1, and can also be used to prompt other nodes except the first node N1 and the second node UE. Need to be silent. Specifically, since the second node UE also sends the CTS frame to other nodes, it is necessary to inform other nodes that the CTS frame is corresponding to the RTS frame sent by the first node N1, and prompts the first node N1 to send to the second node UE. data.

As an implementation manner, the sending module 200 further sends the RTS frame to a third node, so that the third node determines, according to the node indication information, that the node indicated by the node indication information is not the After the third node, it is silent in a preset second time interval, and the second time interval is smaller than the time interval indicated by the second silent time window.

In a specific implementation, when the third node N2 determines, according to the node indication information, that the third node N2 is not the node that listens to the channel, the third node N2 sets the second time interval according to the second quiet time window included in the RTS frame, in the second Silence during the time interval.

Optionally, the duration of the second time interval is less than the duration of the second quiet time window included in the RTS frame. In order to improve the resource utilization of the third node N2 and reduce the redundant silence time of the third node N2, the duration of the second time interval may be less than the duration of the second silent time window included in the RTS frame. Specifically, as shown in FIG. 13, in order to ensure that the second node UE can send the CTS frame in the third time interval, the second time interval may be equal to the third time interval set by the second node UE, if the third node N2 does not have The CTS frame sent by the second node UE is received in the second time interval, indicating that the second node UE may fail to listen. However, the time after the third time interval is still within the second silence time window included in the RTS frame, so if the second time interval is equal to the third time interval set by the second node UE, after waiting for the second time interval The three-node N2 can resume normal working state. For example, after waiting for the second time interval, the third node N2 can listen to the channel. If the channel is idle, the third node N2 can send data to the node that needs the third node N2 to serve. An optional case is (not shown), the second node UE has sent the CTS frame and the third node N2 has not received successfully, and the third node N2 can still resume normal operation after the second time interval. The state, the channel is monitored, and if the channel is busy (the first node N1 is transmitting data to the second node UE), the third node N2 stops transmitting data to the second node UE.

An embodiment of the present invention provides a node device, where a first node sends a request to send a RTS frame to a second node on a channel, and the first node sends a preset time interval after sending the RTS frame. The second node receives the time for clearing and transmitting the CTS frame, where the first time interval is greater than a short interframe interval; the first node determines a time interval indicated by the first quiet time window included in the CTS frame; the first node includes the first time in the CTS frame Sending data to the second node on the channel during the time interval indicated by the quiet time window improves the probability that the second node listens to the channel idle, improves the probability of transmitting the CTS frame, and improves the utilization of the channel resource.

Referring to FIG. 3, FIG. 3 is a schematic structural diagram of another embodiment of a first node device according to an embodiment of the present invention. The node device shown in FIG. 3 includes a receiver 300, a transmitter 310, and a processor 320 (the number of processors 320 in the node device may be one or more, and one processor in FIG. 3 is taken as an example). In the embodiment of the present invention, the receiver 300, the transmitter 310, and the processor 320 may be connected by a bus or other means, wherein the connection through the bus is taken as an example in FIG.

The transmitter 310 is configured to send a request to send a RTS frame to a second node on a channel, and the receiver 300 is configured to preset a first time interval after the transmitter 310 sends the RTS frame. Receiving, by the second node, a clear CTS frame, where the first time interval is greater than a short interframe interval; the processor 320, configured to determine that the CTS frame received by the receiver 300 includes The time interval indicated by the first quiet time window; the transmitter 310 is further configured to be on the channel within a time interval indicated by the first quiet time window included in the CTS frame determined by the processor 320 Sending data to the second node.

In an implementation manner, the RTS frame includes a second quiet time window and node indication information, where the second quiet time window is used to indicate that the receiver 300 after receiving the CTS frame corresponding to the RTS frame The processor 320 is capable of not listening to the channel, and the transmitter 310 directly sends a cutoff time of data to the second node on the channel, where the node indication information is used to indicate the second node.

In an implementation manner, the CTS frame further includes identifier information of the node device, and the identifier information of the node device is used to enable the transmitter 310 to send data to the second node.

In an implementation manner, the transmitter 310 further sends the RTS frame to a third node, so that the third node determines, according to the node indication information, a section indicated by the node indication information. After the point is not the third node, it is silent in a preset second time interval, and the second time interval is smaller than the time interval indicated by the second silent time window.

An embodiment of the present invention provides a node device, where a first node sends a request to send a RTS frame to a second node on a channel; the first node receives a second time interval in a preset first time interval after sending the RTS frame. Clearing a CTS frame, the first time interval is greater than a short interframe space; the first node determines a time interval indicated by the first quiet time window included in the CTS frame; and the first node includes a first silent time window in the CTS frame Transmitting data to the second node on the channel during the indicated time interval improves the probability that the second node listens to the channel idle, improves the probability of transmitting the CTS frame, and improves the utilization of the channel resource.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of an embodiment of a second node device according to an embodiment of the present invention. For convenience of description, as shown in FIG. 12 and FIG. 13, the node device (ie, the second node) involved in this embodiment is configured as a user equipment, and other nodes are all configured as base stations. The fourth node N3 in the figure is a node device that the first node N1 cannot monitor. The first node N1, the second node UE, the third node N2, and the fourth node N3 transmit data on the same channel, and both can work in an LTE network or a WiFi network. In addition, the channel involved in this embodiment is a channel on an unlicensed spectrum. The details will be described below.

The node device shown in FIG. 4 includes a receiving module 400, a listening module 410, and a sending module 420.

The receiving module 400 is configured to receive, on a channel, a request sent by the first node to send an RTS frame.

In a specific implementation, the second node UE receives the RTS frame sent by the first node N1 on the channel, where the RTS frame includes a second quiet time window and node indication information, where the second silent time window is used to indicate the first After receiving the CTS frame corresponding to the RTS frame, the node can directly send a data off time to the receiving module 400 on the channel without listening to the channel, where the node indication information is used to indicate the node. device. The related embodiment of the second silent time window can be seen in detail in FIG. 2 of the embodiment, and the details are not described in this embodiment.

The monitoring module 410 is configured to monitor the channel and determine that the channel is idle, in the third time interval after the receiving module receives the RTS frame sent by the first node, the third The time interval is greater than the time between one short interframe space.

In a specific implementation, as shown in FIG. 12, after receiving the RTS frame, the second node UE monitors the channel in a preset third time interval, and if the channel is idle during the third time interval, the second node UE Sending a CTS frame to the first node N1, prompting the first node N1 to send data to the second node UE. In this embodiment, the unit time of the third time interval can be used as the time of one SIFS. Since the second node UE needs at least one SIFS waiting time from receiving the RTS frame to transmitting the CTS frame, the second node UE can send the CTS frame at least after receiving the time of one SIFS of the RTS frame. As shown in FIG. 12, the third time interval preset by the second node UE is delayed by one SIFS time than the first time interval preset by the first node N1. Since the third time interval is greater than one SIFS time, the probability of listening to idle is increased, and the probability that the second node UE transmits the CTS frame is also increased.

As an implementable manner, as shown in FIG. 4, the receiving module 400 further includes a determining module 430, where:

The determining module 430 is configured to determine, according to the node indication information, that the node indicated by the node indication information is the node device.

In a specific implementation, the RTS frame is used to instruct the second node UE to monitor the channel in this embodiment. Specifically, the second node UE may confirm, by using the node indication information, that the second node UE is a node that needs to monitor the channel, and whether the listening channel is a node other than the first node N1 (such as a neighboring node, that is, the third node N2, or For example, the hidden node, that is, the fourth node N3) is occupied.

Optionally, the monitoring module 410 determines that the channel of the node device is idle. The receiving module 400 monitors that the channel of the node device is idle for a predetermined fourth time, and the fourth time is greater than or equal to a short interframe space. time.

In a specific implementation, if the monitoring module 410 finds that the channel is idle for a predetermined fourth time during the monitoring, the channel is determined to be idle. Specifically, the fourth time may be greater than or equal to one SIFS time. For example, the fourth time may be a time of n SIFS, and n is greater than or equal to 1. Alternatively, the fourth time may be greater than or equal to an arbitrarily set unit time, and the time interval of the unit time is not limited, such as a unit time of 20 microseconds, 1 millisecond, or the like. Alternatively, the listening module 410 may set an initial value in a preset third time interval, and when the channel is found to be idle in one unit time, the random number is decremented by one until the random number is reduced to 0. When the time monitored by the time monitoring module 410 is still within a preset third time interval, the listening module 410 can confirm that the channel is idle and send a CTS frame to the first node N1. If the initial value is set to 4, it represents 4 unit time. When the listening module 410 monitors that the channel has 1 unit time idle, the random number is decremented by 1 until the random number is reduced to 0. In this embodiment, the time interval for the monitoring unit 410 to monitor the difference between the unit time periods in which the channel is idle is not limited, as long as four unit time is idle in the third time interval preset by the second node UE, The two-node UE can send a CTS frame to the first node N1.

The sending module 420 is configured to determine, according to the listening module 410, that the channel is idle, and send a clear sending CTS frame to the first node.

In a specific implementation, if the monitoring module 410 finds that the channel is idle in the preset fourth time during the monitoring, the channel is determined to be idle, and the sending module 420 can send the CTS frame to the first node N1.

The receiving module 400 is further configured to receive data sent by the first node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.

In a specific implementation, the CTS frame includes a first quiet time window. After the second node UE sends the CTS frame to the first node N1, the first node N1 may be according to the time interval indicated by the first quiet time window included in the CTS frame. Sending information to the second node UE, and other nodes that receive the CTS frame sent by the second node UE (such as the neighboring node, that is, the third node N2, and the hidden node, the fourth node N3) Silent according to the time interval indicated by the first quiet time window included in the CTS frame.

In an implementable manner, the first silent time window is determined by the node device according to the second silent time window. The steps of the determination can be seen in detail in FIG. 2 of the embodiment, and the details are not described in this embodiment.

As an implementation manner, the CTS frame further includes identifier information of the first node, where the identifier information of the first node is used to enable the first node to send data to the receiving module 400. The identification information of the first node N1 can also be used to make other nodes than the first node N1 (such as the neighboring node, that is, the third node N2, or the hidden node, the fourth node N3), to determine that it is a node that needs to be silent.

As an implementable manner, the transmitting module 420 also sends a CTS frame to the third node to silence the third node within a time interval indicated by the first silent time window included in the CTS frame. The third node N2 is a neighboring node. When the third node N2 receives the CTS frame sent by the second node UE, the third node N2 is confirmed to be a node that needs to be silenced by the identifier information of the first node N1 included in the CTS frame. Then the third node N2 is silent according to the time interval indicated by the first silent time window included in the CTS frame.

An embodiment of the present invention provides a node device, where a second node receives a request sent by a first node to send an RTS frame on a channel, and the second node receives a preset third time interval after receiving the RTS frame sent by the first node. Listening to the channel and determining that the channel is idle, the third time interval is greater than a short interframe space; the second node sends a clear CTS frame to the first node according to determining that the channel is idle; the second node includes the CTS frame. Receiving the data sent by the first node on the channel during the time interval indicated by the quiet time window improves the probability of listening to the channel idle, improves the probability of transmitting the CTS frame, and improves the utilization of the channel resource.

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of another embodiment of a second node device according to an embodiment of the present invention. The node device shown in FIG. 5 includes a receiver 500, a transmitter 510, and a processor 520 (the number of processors 520 in the node device may be one or more, and one processor in FIG. 5 is taken as an example). In the embodiment of the present invention, the receiver 500, the transmitter 510, and the processor 520 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.

The receiver 500 is configured to receive, on a channel, a request to send an RTS frame sent by the first node, where the processor 520 is configured to: after the receiver 500 receives the RTS frame sent by the first node During a predetermined third time interval, the channel is monitored and the channel is determined to be idle, the third time interval is greater than a short interframe time; the transmitter 510 is configured to perform processing according to the The device 520 determines that the channel is idle, and sends a clear to send CTS frame to the first node; the receiver 500 is further configured to: in the time interval indicated by the first quiet time window included in the CTS frame Receiving data sent by the first node.

As an implementation manner, the RTS frame includes a second quiet time window and node indication information, where the second quiet time window is used to indicate that the first node after receiving the CTS frame corresponding to the RTS frame The deadline for transmitting data directly to the receiver 500 on the channel without listening to the channel, the node indication information being used to indicate the node device.

In an implementation manner, the first silence time window is determined by the processor 520 according to the second silence time window.

In an implementation manner, the processor 520 is further configured to determine, according to the node indication information, that the node indicated by the node indication information is the node device.

In an implementation manner, the CTS frame further includes identifier information of the first node, and the identifier information of the first node is used to enable the first node to send data to the receiver 500.

In an implementation manner, the transmitter 510 transmits the CTS frame to a third node to silence the third node within a time interval indicated by a first silence time window included in the CTS frame.

An embodiment of the present invention provides a node device, where a second node receives a request to send an RTS frame sent by a first node on a channel, and a preset third time interval after the second node receives an RTS frame sent by the first node. When the inner channel is idle, the second node sends a clear CTS frame to the first node, where the third time interval is greater than a short interframe interval; and the second node indicates the time indicated by the first quiet time window included in the CTS frame. Receiving the data sent by the first node on the channel in the interval improves the probability of listening to the channel idle, improves the probability of transmitting the CTS frame, and improves the utilization of the channel resource.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of an embodiment of a third node device according to an embodiment of the present invention. The third node device involved in FIG. 6 may be the third node N2, and the third node N2 is the neighboring node of the first node N1 in the foregoing embodiment. First node N1, second node UE, third node N2 and the fourth node N3 transmit data on the same channel, and both can work in an LTE network or a WiFi network. In addition, the channel involved in this embodiment is a channel on an unlicensed spectrum. In the prior art, since the quiet duration of the neighboring nodes is relatively fixed, the third time interval is set by the third node N2 in this embodiment, and the silence of the neighboring nodes is shortened when the CTS frame sent by the second node UE is not received. time.

The node device shown in FIG. 6 includes a receiving module 600, a listening module 610, and a sending module 620.

The receiving module 600 is configured to receive, on a channel, a request sent by the first node to send an RTS frame, where the RTS frame includes a second silent time window.

In a specific implementation, when the first node N1 sends an RTS frame to the second node UE on the channel, the first node N1 also sends an RTS frame to the neighboring node of the first node N1. After the third node N2, which is a neighboring node, receives the RTS frame, the third node N2 is silent.

As an implementation manner, the RTS frame includes a second quiet time window, where the second quiet time window is used to indicate that the first node can not listen after receiving the clear sending CTS frame corresponding to the RTS frame. The channel directly transmits a deadline for data to the second node on the channel. Specifically, the second quiet time window may be used to indicate that the RTS frame is sent from the first node N1, and after receiving the CTS frame corresponding to the RTS frame, the first node N1 can directly listen to the channel and directly to the second node on the channel. The time interval at which the UE ends when data is sent.

In an implementation manner, the RTS frame further includes node indication information, where the node indication information is used to indicate the second node.

Then, as shown in FIG. 6, the node device further includes a determining module 630.

The determining module 630 is configured to determine, according to the node indication information, that the node indicated by the node indication information is not the node device. Specifically, the third node N2 determines that the third node N2 is not the node that listens to the channel according to the node indication information in the RTS frame, that is, the third node N2 is a node that needs to be silent.

The monitoring module 610 is configured to: after waiting for a preset second time interval, monitor the channel and determine that the channel is idle, and the second time interval is less than a time interval indicated by the second silent time window. .

In a specific implementation, when the third node N2 determines, according to the node indication information, the third node N2 is not a supervisor. When listening to the node of the channel, the third node N2 sets a second time interval according to the second quiet time window included in the RTS frame, and silences in the second time interval, waiting for the CTS frame sent by the second node UE.

Optionally, the duration of the second time interval is less than the indicated time interval of the second quiet time window included in the RTS frame. In order to improve the resource utilization of the third node N2 and shorten the redundant silence time of the third node N2, the duration of the second time interval may be smaller than the indicated time interval of the second silent time window included in the RTS frame. Specifically, in order to ensure that the second node UE can send the CTS frame in the third time interval, the duration of the second time interval may be equal to the duration of the third time interval set by the second node UE, if the third node N2 is not in the first The CTS frame sent by the second node UE is received in the second time interval, indicating that the second node UE may fail to listen. However, the time after the third time interval set by the second node UE is still within the second quiet time window included in the RTS frame, so if the duration of the second time interval is equal to the third time interval set by the second node UE The duration of the third node N2 can resume normal operation after waiting for the second time interval. For example, after waiting for the second time interval, the third node N2 can listen to the channel. If the channel is idle, the third node N2 can send data to the node that needs the third node N2 to serve. An optional case is that the second node UE has sent the CTS frame and the third node N2 has not successfully received. After waiting for the second time interval, the third node N2 can still resume the normal working state and listen to the channel. If the channel is busy (eg, the first node N1 is transmitting data to the second node UE), the third node N2 is silent.

As an implementable manner, the node device further includes a silence module 640.

a silence module 640, configured to: if the receiving module 600 receives the CTS frame sent by the second node in the second time interval, indicating in a first quiet time window included in the CTS frame Silence within the time interval, the first silent time window being determined by the second node according to the second silent time window.

Optionally, the CTS frame includes a first quiet time window, configured to indicate a silent time interval of the node that needs to be silent to receive the CTS frame. If the receiving module 600 receives the CTS frame sent by the second node UE in the second time interval, it is silent according to the time interval indicated by the first silent time window included in the CTS frame.

Optionally, the first quiet time window included in the CTS frame is determined by the second node according to the second silent time window included in the RTS frame. The steps of the determination can be seen in detail in FIG. 2 of the embodiment, and the details are not described in this embodiment.

In an implementation manner, the CTS frame further includes identifier information of the first node, where The identifier information of the first node is used to enable the first node to send data to the second node, so that the silence module 640 determines that the node device is a silent node. The third node N2 is a neighboring node. When the third node N2 receives the CTS frame sent by the second node UE, the third node N2 is confirmed to be a node that needs to be silenced by the identifier information of the first node N1 included in the CTS frame. Then the third node N2 is silent according to the time interval indicated by the first silent time window included in the CTS frame. For the related embodiments of the identification information of the first node N1, see FIG. 2 and FIG. 4 of the embodiment, and the details are not described in this embodiment.

The sending module 620 is configured to determine, according to the listening module 610, that the channel is idle, and send data through the channel to a node that needs to be served by the node device.

In a specific implementation, after the listening module 610 waits for the second time interval, the listening module 610 can monitor the channel. If the monitoring module 610 determines that the channel is idle, the sending module 620 can determine that the channel is idle according to the monitoring module 610, and needs the third node. The node of the N2 service sends data.

Optionally, the monitoring module 610 determines that the channel is idle. The monitoring module 610 monitors that the channel is idle for a predetermined fourth time, and the fourth time is greater than or equal to a short interframe space. Specifically, the specific setting process of the fourth time can be seen in FIG. 4 of the embodiment, and the embodiment is not described.

An embodiment of the present invention provides a node device, where a third node receives a request sent by a first node to send an RTS frame on a channel, where the RTS frame includes a second silent time window; and the third node waits for a preset second time interval. And monitoring the channel and determining that the channel is idle, and the second time interval is smaller than the time interval indicated by the second quiet time window; and the third node increases the channel, and sends data to the node that needs to serve the third node by using the channel, thereby improving the The resource utilization of neighboring nodes shortens the quiet time of neighboring nodes.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of another embodiment of a third node device according to an embodiment of the present invention. The node device shown in FIG. 7 includes a receiver 700, a transmitter 710, and a processor 720 (the number of processors 720 in the node device may be one or more, and one processor in FIG. 7 is taken as an example). In the embodiment of the present invention, the receiver 700, the transmitter 710, and the processor 720 may be connected by a bus or other means, wherein the connection through the bus is taken as an example in FIG.

The receiver 700 is configured to receive, on a channel, a request to send an RTS frame sent by a first node, where the RTS frame includes a second quiet time window, and the processor 720 is configured to wait for a preset second After the time interval, the channel is monitored and the channel is determined to be idle, the second time interval is less than the time interval indicated by the second quiet time window; the transmitter 710 is configured to be used according to the processor 720 determines that the channel is idle, and transmits data through the channel to a node that needs to serve the node device.

In an implementation manner, the second quiet time window is configured to instruct the first node to directly listen to the channel and directly on the channel after receiving the clear sending CTS frame corresponding to the RTS frame. The deadline for sending data to the second node.

In an implementation manner, the RTS frame further includes node indication information, where the node indication information is used to indicate the second node, and the processor 720 is further configured to determine, according to the node indication information, The node indicated by the node indication information is not the node device.

In an implementation manner, the processor 720 is further configured to: if the receiver 700 receives the CTS frame sent by the second node in the second time interval, then in the CTS The frame is silenced within a time interval indicated by a first silence time window, the first silence time window being determined by the second node according to the second silence time window.

As an implementation manner, the CTS frame further includes identifier information of the first node, where the identifier information of the first node is used to enable the first node to send data to the second node, so that The processor 720 determines that the node device is a silent node.

An embodiment of the present invention provides a node device, where a third node receives a request sent by a first node to send an RTS frame on a channel, where the RTS frame includes a second silent time window; and the third node waits for a preset second time interval. The third node monitors the channel, and the second time interval is smaller than the time interval indicated by the second quiet time window; when the third node monitors that the channel is idle, the third node sends data to the node that needs to serve the third node, thereby Improve resource utilization of neighboring nodes and shorten silent time of neighboring nodes.

Please refer to FIG. 8. FIG. 8 is a schematic structural diagram of a system according to an embodiment of the present invention. The system shown in FIG. 8 includes the first node 800, the second node 810, and the third node 820 of the embodiments FIGS. 2, 4, and 6.

The first node 800 is configured to send, on the channel, a request to send the RTS frame to the second node 810, and receive, from the second node 810, within a preset first time interval after sending the RTS frame. Clearing a CTS frame, where the first time interval is greater than a short interframe interval, determining a time interval indicated by a first quiet time window included in the CTS frame, and a first silent time window included in the CTS frame Data is transmitted to the second node 810 over the channel during the indicated time interval.

The second node 810 is configured to receive, on the channel, the request sending RTS frame sent by the first node 800, and to the channel in a preset third time interval after receiving the RTS frame sent by the first node 800. Performing monitoring and determining that the channel is idle, the third time interval is greater than a short interframe interval, and according to determining that the channel is idle, sending a clear sending CTS frame to the first node 800, where the CTS frame is included The data transmitted by the first node 800 is received on the channel within a time interval indicated by the first quiet time window.

The third node 820 is configured to receive, on the channel, the request sending the RTS frame sent by the first node 800, where the RTS frame includes a second quiet time window, and after waiting for the preset second time interval, performing the channel Monitoring and determining that the channel is idle, the second time interval being smaller than a time interval indicated by the second quiet time window, and determining, by the channel, to a node that needs to serve the third node 820 according to determining that the channel is idle send data.

The embodiment of the present invention provides a system. On one hand, the first node sends an RTS frame to the second node and the third node, and sets a first time interval, and receives the CTS frame sent by the second node in the first time interval. The second node sets a third time interval, and monitors the channel in the third time interval. If the second node determines that the channel is idle, the CTS frame is sent to the first node, and if the first node receives the second time in the first time interval. The CTS frame sent by the node, the first node sends data to the second node through the channel; on the other hand, the third node sets the second time interval, waits for the CTS frame sent by the second node in the second time interval, and waits After the second time interval, the channel is monitored. If the third node determines that the channel is idle, the data is sent to the node that needs to be served by the third node, which improves the probability that the second node listens to the channel idle, and improves the transmission of the CTS frame. Probability also improves the resource utilization of neighboring nodes and shortens the quiet time of neighboring nodes.

Please refer to FIG. 9. FIG. 9 is a schematic flowchart diagram of a first method for transmitting data according to an embodiment of the present invention.

As shown in FIG. 9, the first method for transmitting data in the embodiment of the present invention may include the following steps:

S900. The first node sends a request to send a RTS frame to the second node on the channel.

S910. The first node presets a first time interval after sending the RTS frame. And receiving, by the second node, a clear CTS frame, where the first time interval is greater than a short interframe space.

S920. The first node determines a time interval indicated by a first quiet time window included in the CTS frame.

S930. The first node sends data to the second node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.

In a specific implementation, as shown in FIG. 12 and FIG. 13, the first node N1 sends an RTS frame to the second node UE. The RTS frame includes a second silence time window and node indication information.

In an implementation manner, the second quiet time window is used to indicate that the first node, after receiving the CTS frame corresponding to the RTS frame, can directly listen to the channel and directly on the channel. The deadline for the second node to send data, the node indication information is used to indicate the second node. Specifically, the second quiet time window may be used to indicate that the RTS frame is sent from the first node N1, and after receiving the CTS frame corresponding to the RTS frame, the first node N1 can directly listen to the channel and directly to the second node on the channel. The time interval at which the UE ends when data is sent.

Optionally, the timing at which the first node N1 sends the RTS frame may be any one of the following: when the first node N1 sends data to the second node UE, the acknowledgment receiving that is not fed back by the second node UE is not received within a preset time. Information; the capacity of the data sent by the first node N1 to the second node UE exceeds a preset capacity, for example, the channel is occupied by a node that is not monitored by the first node N1 (such as the fourth node N3), and the capacity of the data exceeds the preset. The capacity may exceed the capacity that the second node UE channel can carry at this time. Therefore, the present embodiment enables the first node N1 to determine the timing of transmitting data to the second node UE.

Optionally, the first node N1 may further send an RTS frame to the second node UE on the channel where the primary carrier is located. The above primary carrier can be on the licensed spectrum. The channel in this embodiment is a channel on the unlicensed spectrum, and the channel on the unlicensed spectrum can carry the secondary carrier in the carrier aggregation technology. The secondary carrier performs carrier aggregation with the primary carrier on the licensed spectrum, so that the second node UE adopts carrier aggregation and other power saving. The device transmits data. The first node N1 may not wait for the transmission of data on the channel of the unlicensed spectrum where the secondary carrier is located, that is, after the first node N1 is monitored, it is found that the channel where the secondary carrier is located is always in a busy state, and the spectrum is authorized at this time. The channel on which the primary carrier is located can transmit data, and the first node N1 can select to send an RTS frame to the second node UE on the channel where the primary carrier is located. After receiving the RTS frame sent by the first node N1, the second node UE monitors the channel where the secondary carrier is located in a preset third time interval. When the second node UE finds that the channel where the secondary carrier is located is idle, it can send the CTS frame to the first node N1.

In a specific implementation, if the first node N1 receives the CTS frame sent by the second node UE in the first time interval, it indicates that the second node UE has monitored that the channel is not occupied by other nodes, and the first node N1 is in the second Send data to the second node UE in the silent time window, while other nodes (such as adjacent The node, ie the third node N2, or the hidden node, ie the fourth node N3, remains silent during the second silent time window, suspending the transmission of data to the second node UE.

In an implementation manner, the CTS frame further includes identifier information of the first node, where the identifier information of the first node is used to enable the first node to send data to the second node. The identifier information of the first node N1 is further used to indicate that the CTS frame sent by the second node UE corresponds to the RTS frame sent by the first node N1, and can also be used to prompt other nodes except the first node N1 and the second node UE. Need to be silent. Specifically, since the second node UE also sends the CTS frame to other nodes, it is necessary to inform other nodes that the CTS frame is corresponding to the RTS frame sent by the first node N1, and prompts the first node N1 to send to the second node UE. data.

In an implementation manner, the first node further sends the RTS frame to a third node, so that the third node determines, according to the node indication information, that the node indicated by the node indication information is not the After the third node, it is silent in a preset second time interval, and the second time The interval is less than the time interval indicated by the second silent time window.

An embodiment of the present invention provides a method for transmitting data, where a first node sends a request to send a RTS frame to a second node on a channel; the first node selects a second time interval after transmitting the RTS frame from the second The node receives the clearing of the CTS frame, the first time interval is greater than a short interframe space; the first node determines the time interval indicated by the first quiet time window included in the CTS frame; the first node includes the first silence in the CTS frame. The data is sent to the second node on the channel during the time interval indicated by the time window, which improves the probability that the second node listens to the channel idle, improves the probability of transmitting the CTS frame, and improves the utilization of the channel resource.

FIG. 10 is a schematic flowchart diagram of a method for receiving data according to an embodiment of the present invention.

As shown in FIG. 10, the method for receiving data in the embodiment of the present invention may include the following steps:

S1000. The second node receives, on the channel, a request sent by the first node to send an RTS frame.

S1010: The second node monitors the channel and determines that the channel is idle in a preset third time interval after receiving the RTS frame sent by the first node, where the third time interval is greater than The time between a short frame interval.

S1020. The second node sends a clear sending CTS frame to the first node according to determining that the channel is idle.

S1030. The second node receives data sent by the first node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.

In a specific implementation, the RTS frame includes a second quiet time window and node indication information, where the second quiet time window is used to indicate that the first node can not listen after receiving the CTS frame corresponding to the RTS frame. The channel directly sends a cutoff time of data to the second node on the channel, and the node indication information is used to indicate the second node. The related embodiment of the second silent time window can be seen in detail in FIG. 2 of the embodiment, and the details are not described in this embodiment.

Optionally, as shown in FIG. 12 and FIG. 13, the first node N1 may further send an RTS frame to the second node UE on the channel where the primary carrier is located. The above primary carrier can be on the licensed spectrum. Related to this embodiment The channel is a channel on the unlicensed spectrum, and the channel on the unlicensed spectrum can carry the secondary carrier in the carrier aggregation technology. The secondary carrier performs carrier aggregation with the primary carrier on the licensed spectrum, so that the second node UE uses carrier aggregation and other power saving devices to transmit data. The first node N1 may not wait for the transmission of data on the channel of the unlicensed spectrum where the secondary carrier is located, that is, after the first node N1 is monitored, it is found that the channel where the secondary carrier is located is always in a busy state, and the spectrum is authorized at this time. The channel on which the primary carrier is located can transmit data, and the first node N1 can select to send an RTS frame to the second node UE on the channel where the primary carrier is located. After receiving the RTS frame sent by the first node N1, the second node UE monitors the channel where the secondary carrier is located in a preset third time interval. When the second node UE finds that the channel where the secondary carrier is located is idle, it can send the CTS frame to the first node N1.

In an implementable manner, the first silent time window is determined by the second node according to the second silent time window. The steps of the determination can be seen in detail in FIG. 2 of the embodiment, and the details are not described in this embodiment.

As an implementable manner, after the above step S1000, the method further includes S1040 (not shown).

S1040. The second node determines, according to the node indication information, that the node indicated by the node indication information is the second node.

Optionally, the condition that the second node UE determines that the channel of the node device is idle may be: the second node UE monitors that the channel of the node device is idle in a preset fourth time, and the fourth time is greater than or equal to a short frame. The time of the interval.

In a specific implementation, if the second node UE finds that the channel is idle for a predetermined fourth time during the monitoring, the UE determines that the channel is idle. Specifically, the fourth time may be greater than or equal to one SIFS time. For example, the fourth time may be a time of n SIFS, and n is greater than or equal to 1. Alternatively, the fourth time may be greater than or equal to an arbitrarily set unit time, and the time interval of the unit time is not limited, such as a unit time of 20 microseconds, 1 millisecond, or the like. Alternatively, the second node UE may set an initial value in a preset third time interval, and when the channel is found to be idle in one unit time, the random number is decremented by one until the random number is reduced to 0. At this time, the time that the second node UE is listening is still within the preset third time interval, then the second node UE can confirm that the channel is idle, and send the CTS frame to the first node N1. If the initial value is set to 4, representing 4 unit time, each time the second node UE hears that the channel has 1 unit time idle, the random number is decremented by 1 until the random number is reduced to zero. In this embodiment, the time interval for the second node UE to monitor the difference between the unit time periods in which the channel is idle is not limited, as long as four unit time is idle in the third time interval preset by the second node UE, The second node UE can send a CTS frame to the first node N1.

In a specific implementation, if the second node UE finds that the channel is idle for a predetermined fourth time during the monitoring, it determines that the channel is idle, and the second node UE can send the CTS frame to the first node N1.

In a specific implementation, the CTS frame includes a first quiet time window. After the second node UE sends the CTS frame to the first node N1, the first node N1 may be according to the time interval indicated by the first quiet time window included in the CTS frame. Sending information to the second node UE, and other nodes that receive the CTS frame sent by the second node UE (such as the neighboring node, that is, the third node N2, and the hidden node, the fourth node N3) are according to the first included in the CTS frame. The time interval indicated by the silent time window is silent.

In an implementation manner, the CTS frame further includes identifier information of the first node, where the identifier information of the first node is used to enable the first node to send data to the second node. The identification information of the first node N1 can also be used to make other nodes than the first node N1 (such as neighboring nodes) That is, the third node N2, or the hidden node, that is, the fourth node N3, determines that it is a node that needs to be silent.

In an implementation manner, the second node further sends the CTS frame to a third node, so that the third node is silent within a time interval indicated by a first quiet time window included in the CTS frame. . The third node N2 is a neighboring node. When the third node N2 receives the CTS frame sent by the second node UE, the third node N2 is confirmed to be a node that needs to be silenced by the identifier information of the first node N1 included in the CTS frame. Then the third node N2 is silent according to the time interval indicated by the first silent time window included in the CTS frame.

An embodiment of the present invention provides a method for receiving data, where a second node receives a request sent by a first node to send an RTS frame on a channel, and a second time after the second node receives an RTS frame sent by the first node. During the interval, the channel is monitored and the channel is determined to be idle, and the third time interval is greater than a short interframe interval; the second node sends a clear CTS frame to the first node according to determining that the channel is idle; the second node is included in the CTS frame. The data sent by the first node is received on the channel during the time interval indicated by the first quiet time window, which not only improves the probability of listening to the channel idle, but also improves the probability of transmitting the CTS frame and improves the utilization of the channel resource.

FIG. 11 is a schematic flowchart diagram of a second method for transmitting data according to an embodiment of the present invention.

As shown in FIG. 11, the second method for transmitting data in the embodiment of the present invention may include the following steps:

S1100. The third node receives, on the channel, a request sent by the first node to send an RTS frame, where the RTS frame includes a second quiet time window.

S1110: After waiting for a preset second time interval, the third node monitors the channel and determines that the channel is idle, and the second time interval is less than the time indicated by the second silent time window. interval.

S1120. The third node sends data to a node that needs to be served by the third node by using the channel according to determining that the channel is idle.

In a specific implementation, as shown in FIG. 12 and FIG. 13, when the first node N1 sends an RTS frame to the second node UE on the channel, the first node N1 also sends an RTS frame to the neighboring node of the first node N1. After the third node N2, which is a neighboring node, receives the RTS frame, the third node N2 is silent.

As an implementation manner, the second quiet time window is used to indicate that the first node can directly listen to the channel after receiving the clear CTS frame corresponding to the RTS frame. A deadline for transmitting data to the second node on the channel. Specifically, the second quiet time window may be used to indicate that the RTS frame is sent from the first node N1, and after receiving the CTS frame corresponding to the RTS frame, the first node N1 can directly listen to the channel and directly to the second node on the channel. The time interval at which the UE ends when data is sent.

In an implementation manner, the RTS frame further includes node indication information, where the node indication information is used to indicate the second node. After the above step S1100, the above method further includes S1130 (not shown).

S1130. The third node determines, according to the node indication information, that the node indicated by the node indication information is not the third node.

Specifically, the third node N2 determines that the third node N2 is not the node that listens to the channel according to the node indication information in the RTS frame, that is, the third node N2 is a node that needs to be silent.

In a specific implementation, when the third node N2 determines, according to the node indication information, that the third node N2 is not the node that listens to the channel, the third node N2 sets the second time interval according to the second quiet time window included in the RTS frame, in the second Silence within the time interval, waiting for the CTS frame sent by the second node UE.

As an implementable manner, the above method further includes S1140 (not shown).

S1140. If the third node receives the CTS frame sent by the second node in the second time interval, the third node is indicated by a first quiet time window included in the CTS frame. The time interval is silent, and the first silent time window is determined by the second node according to the second silent time window.

As an implementation manner, the CTS frame further includes identifier information of the first node, where the identifier information of the first node is used to enable the first node to send data to the second node, so that The third node determines that the third node is a silent node. The third node N2 is a neighboring node. When the third node N2 receives the CTS frame sent by the second node UE, the third node N2 is confirmed to be a node that needs to be silenced by the identifier information of the first node N1 included in the CTS frame. Then the third node N2 is silent according to the time interval indicated by the first silent time window included in the CTS frame. For the related embodiments of the identification information of the first node N1, see FIG. 2 and FIG. 4 of the embodiment, and the details are not described in this embodiment.

In a specific implementation, after the third node N2 waits for the second time interval, the third node N2 can monitor the channel. If the third node N2 determines that the channel is idle, it can serve the third node N2 according to the determined channel idle. The node sends data.

An embodiment of the present invention provides a method for transmitting data, where a third node receives a request sent by a first node to send an RTS frame on a channel, the RTS frame includes a second silent time window, and the third node waits for a preset second time. After the interval, the channel is monitored and the channel is determined to be idle. The second time interval is smaller than the time interval indicated by the second quiet time window. The third node sends data to the node that needs to serve the third node through the channel according to determining that the channel is idle. Improve resource utilization and shortening of adjacent nodes The silent time of the neighboring node.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

A node device, where the node device includes:

a sending module, configured to send a request to send a RTS frame to the second node on the channel;

a receiving module, configured to receive a clear sending CTS frame from the second node in a preset first time interval after the transmitting module sends the RTS frame, where the first time interval is greater than one short frame Interval time

a determining module, configured to determine a time interval indicated by a first quiet time window included in the CTS frame received by the receiving module;

The sending module is further configured to send data to the second node on the channel within a time interval indicated by a first quiet time window included in the CTS frame determined by the determining module.
The node device according to claim 1, wherein the RTS frame includes a second silence time window and node indication information, and the second silence time window is used to indicate that the receiving module receives the RTS frame. After the corresponding CTS frame, the sending module can directly send a cutoff time of data to the second node on the channel without listening to the channel, and the node indication information is used to indicate the second node.
The node device of claim 2, wherein the first silence time window is determined by the second node according to the second silence time window.
The node device according to claim 1, wherein the CTS frame further includes identification information of the node device, and the identifier information of the node device is used to enable the sending module to send data to the second node. .
The node device according to claim 2, wherein the sending module further sends the RTS frame to a third node, so that the third node determines, according to the node indication information, that the node indication information is After the node is not the third node, it is silent in a preset second time interval, and the second time interval is smaller than the time interval indicated by the second silent time window.
A node device, characterized in that the node device comprises a receiver, a transmitter and a processor, wherein:

The transmitter is configured to send a request to send a RTS frame to a second node on a channel;

The receiver, configured to receive a clear transmission CTS frame from the second node within a preset first time interval after the transmitter sends the RTS frame, where the first time interval is greater than one short The time between frames;

The processor, configured to determine a time interval indicated by a first quiet time window included in the CTS frame received by the receiver;

The transmitter is further configured to send data to the second node on the channel within a time interval indicated by a first quiet time window included in the CTS frame determined by the processor.
The node device according to claim 6, wherein the RTS frame includes a second silence time window and node indication information, and the second silence time window is used to indicate that the receiver receives the RTS frame After the corresponding CTS frame, the processor can not listen to the channel, and the transmitter directly sends a deadline for transmitting data to the second node on the channel, where the node indication information is used to indicate the Two nodes.
The node device of claim 7, wherein the first silence time window is determined by the second node according to the second silence time window.
The node device according to claim 6, wherein the CTS frame further includes identification information of the node device, and the identifier information of the node device is used to enable the transmitter to send data to the second node. .
The node device according to claim 7, wherein the transmitter further sends the RTS frame to a third node, so that the third node determines, according to the node indication information, that the node indication information is After the node is not the third node, it is silent in a preset second time interval, and the second time interval is smaller than the time interval indicated by the second silent time window.
A node device, where the node device includes:

a receiving module, configured to receive, on a channel, a request sent by the first node to send an RTS frame;

a monitoring module, configured to monitor the channel and determine that the channel is idle, in a third time interval after the receiving module receives the RTS frame sent by the first node, the third time The interval is greater than the interval between short frames;

a sending module, configured to determine, according to the listening module, that the channel is idle, and send a clear sending CTS frame to the first node;

The receiving module is further configured to receive data sent by the first node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.
The node device according to claim 11, wherein the RTS frame includes a second silence time window and node indication information, and the second silence time window is used to indicate that the first node is receiving the RTS After the CTS frame corresponding to the frame, the cutoff time of the data can be directly sent to the receiving module on the channel without listening to the channel, and the node indication information is used to indicate the node device.
The node device according to claim 12, wherein the first silent time window is determined by the node device according to the second silent time window.
The node device according to claim 12, wherein the power saving device further comprises:

And a determining module, configured to determine, according to the node indication information, that the node indicated by the node indication information is the node device.
The node device according to claim 11, wherein the CTS frame further includes identification information of the first node, and the identifier information of the first node is used to send the first node to the receiving module send data.
The node device according to claim 11, wherein the sending module further The third node transmits the CTS frame to silence the third node within a time interval indicated by a first quiet time window included in the CTS frame.
A node device, characterized in that the node device comprises a receiver, a transmitter and a processor, wherein:

The receiver is configured to receive, on a channel, a request sent by the first node to send an RTS frame;

The processor, configured to monitor the channel and determine that the channel is idle, in a preset third time interval after the receiver receives the RTS frame sent by the first node, where The time interval between three time intervals is greater than one short frame interval;

The transmitter is configured to determine, according to the processor, that the channel is idle, and send a clear sending CTS frame to the first node;

The receiver is further configured to receive data sent by the first node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.
The node device according to claim 17, wherein the RTS frame includes a second silence time window and node indication information, and the second silence time window is used to indicate that the first node is receiving the RTS After the CTS frame corresponding to the frame, the cutoff time of the data can be directly sent to the receiver on the channel without listening to the channel, and the node indication information is used to indicate the node device.
The node device of claim 18, wherein the first silence time window is determined by the processor based on the second silence time window.
A node device according to claim 18, wherein

The processor is further configured to determine, according to the node indication information, that the node indicated by the node indication information is the node device.
The node device according to claim 17, wherein the CTS frame further includes identification information of the first node, and the identifier information of the first node is used to make the first node The receiver sends data.
The node device of claim 17, wherein the transmitter further transmits the CTS frame to a third node to cause the third node to indicate at a first silence time window included in the CTS frame Silence during the time interval.
A node device, where the node device includes:

a receiving module, configured to receive, on a channel, a request sent by the first node to send an RTS frame, where the RTS frame includes a second silent time window;

a monitoring module, configured to monitor the channel and determine that the channel is idle after waiting for a preset second time interval, where the second time interval is smaller than a time interval indicated by the second silent time window;

And a sending module, configured to determine, according to the listening module, that the channel is idle, and send data to a node that needs to be served by the node device by using the channel.
The node device according to claim 23, wherein the second silence time window is configured to instruct the first node to not listen to the channel after receiving the clear CTS frame corresponding to the RTS frame. And the deadline for transmitting data to the second node directly on the channel.
The node device according to claim 23, wherein the RTS frame further includes node indication information, and the node indication information is used to indicate the second node;

The node device further includes:

And a determining module, configured to determine, according to the node indication information, that the node indicated by the node indication information is not the node device.
The node device according to claim 24, wherein the node device further comprises:

a silence module, configured to: when the receiving module receives the CTS frame sent by the second node in the second time interval, at a time indicated by a first quiet time window included in the CTS frame Silencing within the interval, the first silent time window is determined by the second node according to the second silent time window.
The node device according to claim 26, wherein the CTS frame further includes identification information of the first node, and the identifier information of the first node is used to make the first node to the second The node sends data, causing the silent module to determine that the node device is a silent node.
A node device, characterized in that the node device comprises a receiver, a transmitter and a processor, wherein:

The receiver is configured to receive, on a channel, a request sent by the first node to send an RTS frame, where the RTS frame includes a second silent time window;

The processor is configured to monitor the channel and determine that the channel is idle after waiting for a preset second time interval, where the second time interval is less than a time indicated by the second silent time window interval;

The transmitter is configured to determine, according to the processor, that the channel is idle, and send data to a node that needs to be served by the node device by using the channel.
The node device according to claim 28, wherein the second silence time window is configured to instruct the first node to not listen to the channel after receiving a clear CTS frame corresponding to the RTS frame. And the deadline for transmitting data to the second node directly on the channel.
The node device according to claim 28, wherein the RTS frame further includes node indication information, and the node indication information is used to indicate the second node;

And the processor is further configured to determine, according to the node indication information, that the node indicated by the node indication information is not the node device.
A node device according to claim 29, wherein

The processor is further configured to: if the receiver receives the CTS frame sent by the second node in the second time interval, indicated by a first quiet time window included in the CTS frame Time Silence within the interval, the first silence time window being determined by the second node according to the second silence time window.
The node device according to claim 31, wherein the CTS frame further includes identification information of the first node, and the identifier information of the first node is used to make the first node to the second The node transmits data, causing the processor to determine that the node device is a silent node.
A system, comprising: the node device according to any one of claims 1 to 5, the node device according to any one of 11 to 16 and the node device according to any one of 23 to 27.
A method for transmitting data, comprising:

The first node sends a request to send a RTS frame to the second node on the channel;

Receiving, by the first node, a clear sending CTS frame from the second node in a preset first time interval after sending the RTS frame, where the first time interval is greater than a short interframe space;

Determining, by the first node, a time interval indicated by a first quiet time window included in the CTS frame;

The first node transmits data to the second node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.
The method according to claim 34, wherein the RTS frame includes a second silence time window and node indication information, and the second silence time window is used to indicate that the first node is receiving the RTS frame After the corresponding CTS frame, the cutoff time of the data can be directly sent to the second node on the channel without listening to the channel, and the node indication information is used to indicate the second node.
The method of claim 35 wherein said first silence time window is determined by said second node based on said second silence time window.
The method of claim 34, wherein said CTS frame further comprises said The identification information of the first node, where the identifier information of the first node is used to enable the first node to send data to the second node.
The method according to claim 35, wherein the first node further sends the RTS frame to a third node, so that the third node determines, according to the node indication information, that the node indication information is indicated. After the node is not the third node, it is silent in a preset second time interval, and the second time interval is smaller than the time interval indicated by the second silent time window.
A method for receiving data, comprising:

Receiving, by the second node, a request sent by the first node to send an RTS frame on the channel;

The second node monitors the channel and determines that the channel is idle in a preset third time interval after receiving the RTS frame sent by the first node, where the third time interval is greater than one short The time between frames;

Sending, by the second node, a clear sending CTS frame to the first node according to determining that the channel is idle;

The second node receives data sent by the first node on the channel within a time interval indicated by a first quiet time window included in the CTS frame.
The method according to claim 39, wherein the RTS frame includes a second silence time window and node indication information, and the second silence time window is used to indicate that the first node is receiving the RTS frame After the corresponding CTS frame, the cutoff time of the data can be directly sent to the second node on the channel without listening to the channel, and the node indication information is used to indicate the second node.
The method of claim 40 wherein said first silence time window is determined by said second node based on said second silence time window.
The method according to claim 40, wherein after the second node receives the request sent by the first node to send the RTS frame on the channel, the method further includes:

The second node determines, according to the node indication information, that the node indicated by the node indication information is the second node.
The method according to claim 39, wherein the CTS frame further includes identification information of the first node, and the identifier information of the first node is used to make the first node to the second node send data.
The method according to claim 39, wherein said second node further transmits said CTS frame to said third node to cause said third node to be indicated by said first silence time window included in said CTS frame Silence during the time interval.
A method for transmitting data, comprising:

The third node receives, on the channel, a request sent by the first node to send an RTS frame, where the RTS frame includes a second silent time window;

After waiting for a preset second time interval, the third node monitors the channel and determines that the channel is idle, and the second time interval is smaller than a time interval indicated by the second silent time window;

The third node sends data to the node that needs to serve the third node through the channel according to determining that the channel is idle.
The method according to claim 45, wherein the second silence time window is configured to instruct the first node to not listen to the channel after receiving a clear CTS frame corresponding to the RTS frame. The deadline for transmitting data directly to the second node on the channel.
The method according to claim 45, wherein the RTS frame further includes node indication information, and the node indication information is used to indicate the second node;

After the third node receives the request sent by the first node to send the RTS frame on the channel, the method further includes:

Determining, by the third node, the section indicated by the node indication information according to the node indication information The point is not the third node.
The method of claim 46, wherein the method further comprises:

And if the third node receives the CTS frame sent by the second node in the second time interval, the third node is at a time indicated by a first quiet time window included in the CTS frame. Silencing within the interval, the first silent time window is determined by the second node according to the second silent time window.
The method according to claim 48, wherein the CTS frame further includes identification information of the first node, and the identification information of the first node is used to make the first node to the second node Transmitting data causes the third node to determine that the third node is a silent node.