CN102369696B - Method and device for accessing network - Google Patents

Abstract

A method and a device for accessing a network are provided, the method comprises the following steps: transmitting a wake-up signal (101) consisting of consecutive sounding frames within a preset transmission duration; receiving a beacon response frame (102) returned by the network node; accessing a network (103) by the network node according to the beacon response frame. The invention can be applied to low-power-consumption networks such as wireless sensor networks and the like, and solves the problem of low efficiency of accessing the nodes into the low-power-consumption networks.

Description

Method and device for accessing network

technical field

The present invention relates to the communication field, in particular to a method and device for accessing a network.

Background technique

In a wireless sensor network, each wireless sensor node is powered by a battery, and the cost of replacing the battery is often higher than the cost of the wireless sensor node itself. In order to prolong the life of wireless sensor nodes and reduce energy consumption, wireless sensor nodes will stay in a dormant time slot for a long time and stay in a dormant state, that is, they will not receive or send information, and will only wake up in a short listening time slot for channel monitoring. After receiving the information sent by other wireless sensor nodes, it will enter the working time slot and process the information, otherwise it will continue to enter the next dormant time slot and remain in the dormant state until the next listening time slot arrives.

In order to adapt to the low power consumption characteristics of wireless sensor networks, in the prior art, when a node needs to access the wireless sensor network, the node will first scan the channel used by the wireless sensor network, and then communicate with other wireless sensors in the working time slot Nodes compete for the right to use the channel. After obtaining the right to use the channel, they send a beacon request frame to the wireless sensor network through the channel. If they receive a beacon response frame returned by the wireless sensor network, they Otherwise, re-compete for the right to use the channel, and resend the beacon request frame to the wireless sensor network after obtaining the right to use the channel, until the signal returned by the wireless sensor network is received The standard response frame or the arrival of the specified access time.

In the process of realizing the present invention, the inventor found that the prior art has at least the following problems:

The transmission gap between the beacon request frames sent by the node to be accessed is relatively large, which may cause the wireless sensor node to miss the opportunity to be woken up due to the listening time slot falling within the transmission gap, resulting in the inability to receive the signal from the node to be accessed. The transmitted beacon request frame causes low efficiency for the node to be accessed to access the wireless sensor network.

Contents of the invention

Embodiments of the present invention provide a method and device for accessing a network, which can improve the efficiency of nodes accessing a low-power consumption network.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A method for accessing a network, comprising: sending a wake-up signal consisting of continuous detection frames within a preset sending duration; receiving a beacon response frame returned by a network node; passing through the network according to the beacon response frame Nodes are connected to the network.

A communication device comprising:

The first sending unit is configured to send a wake-up signal consisting of continuous detection frames within a preset sending duration;

The first receiving unit is configured to receive the beacon response frame returned by the network node;

An accessing unit, configured to access the network through the network node according to the beacon response frame received by the first receiving unit.

The method and device for accessing the network provided by the embodiments of the present invention can send a wake-up signal composed of continuous detection frames to the network side within the preset transmission duration. Since the wake-up signal is composed of continuous detection frames, the The probability of nodes being awakened in a low-power network improves the efficiency of nodes accessing a low-power network.

Description of drawings

FIG. 1 is a flowchart of a method for accessing a network provided by an embodiment of the present invention;

FIG. 2 is a flowchart of a method for accessing a network provided by another embodiment of the present invention;

FIG. 3 is a schematic diagram of a specific implementation of step 201 in the method for accessing the network shown in FIG. 2;

FIG. 4 is a second schematic diagram of the implementation of step 201 in the method for accessing the network shown in FIG. 2;

FIG. 5 is a schematic structural diagram of a detection frame in the method for accessing the network shown in FIG. 2;

FIG. 6 is a schematic structural diagram of a beacon response frame in the method for accessing the network shown in FIG. 2;

FIG. 7 is a schematic diagram of a specific implementation of step 201 in the method for accessing the network shown in FIG. 2;

FIG. 8 is a first structural schematic diagram of a device for accessing a network provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of the first sending unit 801 in the device for accessing the network provided by the embodiment of the invention shown in FIG. 8;

FIG. 10 is a second structural schematic diagram of a device for accessing a network provided by an embodiment of the present invention.

Detailed ways

In order to solve the problem of low efficiency of nodes accessing a low-power consumption network, embodiments of the present invention provide a method and device for accessing a network.

As shown in Figure 1, the method for accessing the network provided by the embodiment of the present invention includes:

Step 101, within the preset sending duration, sending a wake-up signal consisting of continuous detection frames;

Step 102, receiving a beacon response frame returned by the network node;

Step 103, accessing the network through the network node according to the beacon response frame.

The method for accessing the network provided by the embodiment of the present invention can send a wake-up signal composed of continuous detection frames to the network side within the preset transmission duration. Since the wake-up signal is composed of continuous detection frames, the low-power The probability of waking up nodes in the power consumption network, thereby improving the efficiency of nodes accessing low-power networks, solves the problem that in the prior art, the node to be connected sends a beacon request frame to the network side with a large transmission gap, which is caused by the network side The node cannot receive the beacon request frame for a long time, so that the efficiency of the node accessing the network is low, and even the access fails.

The method for accessing the network provided by the embodiment of the present invention can be applied in a low-power network. In order to enable those skilled in the art to understand the technical solution provided by the embodiment of the present invention more clearly, the following access The network method is applied in the wireless sensor network as an example for illustration.

As shown in Figure 2, the method for accessing the network provided by the embodiment of the present invention includes:

Step 201, the node to be accessed sends a wake-up signal consisting of continuous detection frames to the wireless sensor network within a preset sending duration.

In this embodiment, in order to ensure that the wireless sensor nodes on the network side can be woken up in time, the sending duration can be set in two ways:

One is that the sending duration is set to be greater than the sleep time slot of the wireless sensor node, then at this time, as shown in Figure 3, the node to be accessed can send a message to the wireless sensor network within the sending duration Send a wake-up signal consisting of continuous detection frames;

The other is to set the sending duration to be less than the dormancy gap of the wireless sensor node, for example: if the dormancy time slot of the wireless sensor node is t, the sending duration a<t can be set, at this time, as shown in Figure 4 As shown, the step 201 may be: according to the preset sending cycle, within the sending duration of each sending cycle, sending a wake-up signal consisting of continuous detection frames, wherein, the sending cycle m=a+b, b is the sending interval, and b<a, the number of sending cycles can be set according to the total access time of nodes to be accessed, for example: the total access time of nodes to be accessed x=n(a+b)+b, n is The number of sending cycles;

Of course, in actual use, the sending duration can also be set by other methods, and details of each case will not be described here.

In this embodiment, the node to be accessed can send a wake-up signal composed of continuous detection frames to the wireless sensor network in the form of back-to-back, including: the node to be accessed competes for the right to use the channel; After obtaining the channel use right, send the first detection frame; in the interval less than the channel detection time, repeatedly send the detection frame until the sending duration is reached;

Of course, in actual use, the node to be accessed may also send a wake-up signal composed of continuous detection frames to the wireless sensor node on the network side in other ways, and details of each case will not be described here.

In this embodiment, the detection frame may have a structure as shown in FIG. 5, and the detection frame may carry: preamble sequence information, frame length information, frame control segment information, beacon request information, receiving time, and CRC check information, etc. In actual use, the detection frame may be in other forms, for example: the detection frame may not contain beacon request information, or information such as receiving time, and each case will not be described here. .

Step 202, the wireless sensor node receives the wake-up signal in the listening time slot, and sends a beacon response frame to the node to be accessed, and the node to be accessed receives the beacon response frame returned by the wireless sensor node.

In this embodiment, the wireless sensor node may obtain beacon request information from the detection frame as shown in Figure 5, and send a beacon response to the node to be accessed at the receiving time according to the beacon request information frame, the node to be accessed receives the beacon response frame returned by the wireless sensor node at the receiving time.

It is worth noting that, in order to enable the node to be accessed to access the wireless sensor network more quickly, the beacon response frame may carry the working cycle information of the wireless sensor node, and the working cycle may specifically include the wireless sensor node's Information such as sleep time slots and listening time slots, the format of the beacon response frame may be as shown in FIG. 6 , which will not be repeated here.

Step 203, the node to be accessed accesses the wireless sensor network through the wireless sensor node according to the beacon response frame.

If in the step 203, the node to be accessed receives the beacon response frame returned by more than two wireless sensor nodes, it may also include: the node to be accessed returns the beacon response frame from the two or more wireless sensor nodes In the node, select the target wireless sensor node; then at this time, the step 203 is specifically: according to the beacon response frame returned by the selected target wireless sensor node, access the sensor network through the selected target sensor node;

In this embodiment, the node to be accessed can select a target sensor node from more than two wireless sensor nodes that return beacon response frames through various methods, for example: the node to be accessed can select the first one that returns a beacon response The wireless sensor node of the frame is the target wireless sensor node, and the wireless sensor node with the best performance can also be selected as the target wireless sensor node according to the performance of the wireless sensor node that returns the beacon response frame, and each case will not be described here. .

In the method for accessing the network provided by the embodiment of the present invention, after the step 201 and before the step 202, the wireless sensor node may also include sending a wake-up response to the node to be accessed, and the node to be accessed receives the wake-up response Response; the step of the node to be accessed sending a beacon request frame to the wireless sensor node;

If the node to be accessed receives wake-up responses returned by more than two wireless sensor nodes, it also includes the step of selecting a target wireless sensor node from the wireless sensor nodes that return wake-up responses from the two or more wireless sensor nodes. The step of the ingress node sending a beacon request frame to the wireless sensor node is specifically: the node to be accessed sends a beacon request frame to the selected target wireless sensor node;

In this embodiment, the step of selecting a target wireless sensor node from more than two wireless sensor nodes that return wake-up responses, the specific implementation method is the same as the above-mentioned step of selecting a target wireless sensor node from two or more wireless sensor nodes that return beacon response frames The steps for the target wireless sensor are basically the same and will not be repeated here.

It is worth noting that, in general, the sleep time slot of the wireless sensor node on the network side can be known according to the agreement, and the transmission duration can be set according to the sleep time slot; if the sleep time slot of the wireless sensor node cannot be known in advance, the set If the sending duration is set to any value, then the step 201 can send a wake-up signal consisting of continuous detection frames within the sending duration; if the node to be accessed in the step 202 does not receive the beacon returned by the wireless sensor node The response frame may also include: extending the sending duration according to a preset sending duration modification strategy; sending a wake-up signal consisting of continuous detection frames to the wireless sensor network within the extended sending duration, Until the node to be accessed receives the beacon response frame returned by the wireless sensor node or reaches the access implementation;

In this embodiment, the transmission duration modification strategy may be to extend the transmission duration to twice the previous transmission, and the method for the node to be accessed to send a wake-up signal to the wireless sensor network may be as shown in FIG. 7 .

In the method for accessing the network provided by the embodiment of the present invention, the node to be accessed can send a wake-up signal composed of continuous detection frames to the wireless sensor network within the preset transmission duration. Since the transmission interval of the detection frames is less than the The time of channel detection, so the node to be accessed can always occupy the channel to send a wake-up signal to the wireless sensor network, which improves the probability of the wireless sensor node being woken up; since the detection frame can carry beacon request information, the wireless sensor node can According to the node directly sending a beacon response frame to the node to be accessed, the signaling process and network communication resources for the node to be accessed to access the wireless sensor network are saved; since the beacon response frame can carry and send the message The working cycle information of the wireless sensor node of the marked response frame, so that the node to be accessed can access the wireless sensor network more quickly through the wireless sensor node according to the information. The technical solution provided by the embodiment of the present invention improves the efficiency of nodes accessing the wireless sensor network, and solves the problem that in the prior art, the nodes to be accessed send beacon request frames to the network If the beacon request frame is not received, the efficiency of the node accessing the network is low, or even the access fails.

Corresponding to the above method, as shown in FIG. 8 , an embodiment of the present invention further provides a communication device 80, including:

The first sending unit 801 is configured to send a wake-up signal consisting of continuous detection frames within a preset sending duration;

The first receiving unit 802 is configured to receive a beacon response frame returned by the network node;

The accessing unit 803 is configured to access the network through the network node according to the beacon response frame received by the first receiving unit 802 .

Further, as shown in FIG. 9, the first sending unit 801 may include:

a storage unit 8011, configured to store preset sending cycle information;

The first sending subunit 8012 is configured to send a wake-up signal consisting of continuous detection frames within the sending duration of each sending cycle according to the sending cycle stored in the storage unit 8011 .

Further, as shown in FIG. 10, the communication device 80 may further include:

The modification unit 804 is configured to extend the transmission duration according to a preset transmission duration modification policy if the first receiving unit 802 does not receive the beacon response frame returned by the network node;

The first sending unit 801 is further configured to send a wake-up signal consisting of continuous detection frames within the extended sending duration.

Further, as shown in FIG. 10, the communication device 80 may further include:

The first selecting unit 805 is configured to, if the first receiving unit 802 receives beacon response frames returned by more than two network nodes, select a target network node from the two or more network nodes that return beacon response frames ;

The access unit 803 is further configured to access the network through the selected target network node according to the beacon response frame returned by the target network node selected by the first selecting unit 805 .

Further, as shown in FIG. 10, the communication device 80 may further include:

The second receiving unit 806 is configured to receive a wake-up response returned by the network node;

The second sending unit 807 is configured to send a beacon request frame to the network node.

Further, as shown in FIG. 10, the communication device 80 may further include:

The second selecting unit 808 is configured to, if the second receiving unit 806 receives wake-up responses returned by more than two network nodes, select a target network node from the two or more network nodes that return wake-up responses;

The second sending unit 807 is further configured to send a beacon request frame to the target network node selected by the second selecting unit 808 .

For the specific implementation method of the device for accessing the network provided in the embodiment of the present invention, refer to the description of the method for accessing the network provided in the embodiment of the present invention, and details are not repeated here.

The device for accessing the network provided by the embodiment of the present invention can send a wake-up signal composed of continuous detection frames to the network side within the preset transmission duration. Since the wake-up signal is composed of continuous detection frames, the low-power The probability of waking up nodes in the power consumption network, thereby improving the efficiency of nodes accessing low-power networks, solves the problem that in the prior art, the node to be connected sends a beacon request frame to the network side with a large transmission gap, which is caused by the network side The node cannot receive the beacon request frame for a long time, so that the efficiency of the node accessing the network is low, and even the access fails.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, etc. disc or disc, etc.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (11)

1. a method for access network, is characterized in that, comprising:

In the sending duration pre-set, send the wake-up signal be made up of continuous probe frame;

Receive the beacon response frame that network node returns;

According to described beacon response frame by described network node access network;

If do not receive the beacon response frame that network node returns, then also comprise:

According to the sending duration amendment strategy pre-set, extend described sending duration;

In sending duration after described prolongation, send the wake-up signal be made up of continuous probe frame;

If receive the beacon response frame that two or more network node returns, also comprise:

Return the network node of beacon response frame from described two or more, choose target network node;

Then describedly according to described beacon response frame by described network node access network be:

According to the beacon response frame that the described target network node chosen returns, by the described target network node access network chosen.

2. method according to claim 1, is characterized in that, described in the sending duration pre-set, and sends the wake-up signal be made up of continuous probe frame and comprises:

According to the transmission cycle pre-set, in the sending duration in each transmission cycle, send the wake-up signal be made up of continuous probe frame.

3. method according to claim 1, is characterized in that, if described explore frame carries time of reception, then the beacon response frame that described reception network node returns is: at described time of reception, receives the beacon response frame that network node returns.

4. method according to claim 1, after the wake-up signal that described transmission is made up of continuous probe frame, before the beacon response frame that described reception network node returns, also comprises:

What receive that described network node returns wakes response up;

Beacon request frame is sent to described network node.

5. method according to claim 4, is characterized in that, if receive that two or more network node returns wake response up, also comprise:

Returning from described two or more wakes up the network node of response, chooses target network node;

Describedly send beacon request frame to described network node and be:

Beacon request frame is sent to the described target network node chosen.

6. according to the method in claim 1-5 described in any one, it is characterized in that, described explore frame carries beacon request information and/or time of reception.

7. according to the method in claim 1-5 described in any one, it is characterized in that, in the beacon response frame that described network node returns, carry the work period of described network node.

8. a communicator, is characterized in that, comprising:

First transmitting element, in the sending duration pre-set, sends the wake-up signal be made up of continuous probe frame;

First receiving element, for receiving the beacon response frame that network node returns;

Access unit, for the beacon response frame received according to described first receiving element, by described network node access network;

Also comprise:

Amendment unit, if do not receive for described first receiving element the beacon response frame that network node returns, according to the sending duration amendment strategy pre-set, extends described sending duration;

Described first transmitting element, also in the sending duration after described prolongation, sends the wake-up signal be made up of continuous probe frame;

First chooses unit, if receive for described first receiving element the beacon response frame that two or more network node returns, returns the network node of beacon response frame, choose target network node from described two or more;

Described access unit, the beacon response frame also for returning according to described first target network node choosing unit selection, by the described target network node access network chosen.

9. device according to claim 8, is characterized in that, described first transmitting element comprises:

Memory cell, for storing the transmission cycle information pre-set;

First sends subelement, for the transmission cycle according to described cell stores, in the sending duration in each transmission cycle, sends the wake-up signal be made up of continuous probe frame.

10. device according to claim 8, is characterized in that, also comprises:

Second receiving element, wakes response up for what receive that network node returns;

Second transmitting element, for sending beacon request frame to described network node.

11. devices according to claim 10, is characterized in that, also comprise:

Second chooses unit, if receive that two or more network node returns for described second receiving element wake response up, return from described two or more and wake up the network node of response, choose target network node;

Described second transmitting element, the target network node also for choosing unit selection to described second sends beacon request frame.