WO2010099664A1

WO2010099664A1 - Method and device for accessing network

Info

Publication number: WO2010099664A1
Application number: PCT/CN2009/070658
Authority: WO
Inventors: 刘永俊; 徐勇; 赵牧
Original assignee: 华为技术有限公司
Priority date: 2009-03-05
Filing date: 2009-03-05
Publication date: 2010-09-10
Also published as: CN102369696B; CN102369696A

Abstract

A method and device for accessing a network, the method comprises that: within in the predetermined time duration of transmission, a wake up signal which is comprised of consecutive detection fames is transmitted (101); a beacon response frame which is returned from a network node is received (102); the network is accessed via the network node according to the beacon response frame (103). The invention could be applied to the low power consumption network, such as wireless sensor network and resolves the problem of the low efficiency of the node accessing the low power consumption network.

Description

Method and device for accessing network

The present invention relates to the field of communications, and in particular, to a method and apparatus 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 the wireless sensor node and reduce the energy consumption, the wireless sensor node will be in the dormant time slot for a long time, and remain in the dormant state, that is, not receiving or transmitting information, and waking up in the short monitoring time slot for channel monitoring, if After receiving the information sent by other wireless sensor nodes, it enters the working time slot and processes the information, otherwise it continues to enter the next sleep time slot and remains in the sleep state until the next listening time slot arrives.

In order to adapt to the low power consumption characteristics of the wireless sensor network, in the prior art, when a node needs to access the wireless sensor network, the node first scans the channel used by the wireless sensor network, and then with other wireless sensors in the working time slot. The node competes for the right to use the channel, and after obtaining the usage right of the channel, sends a beacon request frame to the wireless sensor network through the channel, and if receiving the beacon response frame returned by the wireless sensor network, according to the The beacon response frame accesses the wireless sensor network, otherwise, the right to use the channel is re-competed, and the beacon request frame is retransmitted to the wireless sensor network after acquiring the usage right of the channel, until the wireless sensor network is received. The beacon responds to the frame or arrives at the specified access time.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems: The transmission gap between beacon request frames sent by the access node is large, which may cause the wireless sensor node to fall due to the monitoring time slot. Within the gap, the missed opportunity to be awakened may result in the inability to receive the beacon request frame sent by the to-be-accessed node, which makes the access node accessing the wireless sensor network less efficient. Summary of the invention

Embodiments of the present invention provide a method and apparatus for accessing a network, which can improve the efficiency of a node accessing a low power network.

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

A method for accessing a network, comprising: transmitting a wake-up signal composed of consecutive sounding frames within a preset transmission duration; receiving a beacon response frame returned by the network node; and passing the network according to the beacon response frame The node accesses the network.

A communication device comprising:

a first sending unit, configured to send a wake-up signal composed of consecutive sounding frames within a preset transmission duration;

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

And an access unit, configured to access the network by using the network node according to the beacon response frame received by the first receiving unit.

The method and device for accessing a network provided by the embodiment of the present invention may send a wake-up signal consisting of consecutive sounding frames to a network side within a preset transmission duration, and the wake-up signal is composed of consecutive sounding frames, thereby improving The probability that a node is woken up in a low-power network increases the efficiency of nodes accessing a low-power network. DRAWINGS

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

2 is a flowchart of a method for accessing a network according to another embodiment of the present invention;

FIG. 3 is a schematic diagram 1 of a specific implementation of step 201 in the method for accessing the network shown in FIG. 2; FIG. 4 is a schematic diagram 2 of a specific implementation of step 201 in the method for accessing the network shown in FIG. 2; A schematic structural diagram of a sounding frame in the method for accessing a network;

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 3 of a specific implementation of step 201 in the method for accessing the network shown in FIG. 2; FIG. 8 is a schematic structural diagram of an apparatus for accessing a network according to an embodiment of the present invention; FIG. 9 is a schematic structural diagram of a first sending unit 801 in an apparatus for accessing a network according to an embodiment of the present invention;

FIG. 10 is a second schematic structural diagram of an apparatus for accessing a network according to an embodiment of the present invention. detailed description

In order to solve the problem that the node is less efficient in accessing the low-power network, the embodiment of the present invention provides a method and an apparatus for accessing the network.

As shown in FIG. 1 , a method for accessing a network according to an embodiment of the present invention includes:

Step 101: Send a wake-up signal consisting of consecutive sounding frames in a preset transmission duration;

Step 102: Receive a beacon response frame returned by the network node.

Step 103: Access the network by using the network node according to the beacon response frame.

The method for accessing the network provided by the embodiment of the present invention may send a wake-up signal composed of consecutive sounding frames to the network side within a preset transmission duration, and the wake-up signal is composed of continuous sounding frames, thereby improving low-power work. The probability that the node in the network is awakened, thereby improving the efficiency of the node accessing the low-power network, and solving the problem that the transmission gap of the beacon request frame sent by the to-be-accessed node to the network side is large in the prior art, resulting in the network side The node does not receive the beacon request frame for a long time, and the node is less efficient in accessing the network, and even the access failure problem.

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

As shown in FIG. 2, a method for accessing a network according to an embodiment of the present invention includes:

Step 201: The to-be-accessed node sends a wake-up signal consisting of consecutive sounding frames to the wireless sensor network within a preset transmission duration.

In this embodiment, in order to ensure that the wireless sensor node on the network side can be awake in time, There are two ways to set the send duration:

For example, if the sending duration is set to be greater than the sleep time slot of the wireless sensor node, then, as shown in FIG. 3, the to-be-accessed node may send to the wireless sensor network during the sending duration. Sending a wake-up signal consisting of consecutive sounding frames;

The other is to set the transmission duration to be smaller than the sleep gap of the wireless sensor node, for example: if the sleep time slot of the wireless sensor node is t, the transmission duration a<t can be set, at this time, as shown in FIG. The step 201 may be: sending, according to a preset transmission period, a wake-up signal consisting of consecutive sounding frames during a transmission duration of each transmission period, where the transmission period is m=a+b, and b is sent. Interval, and 1?<&, the number of transmission periods can be set according to the total access time of the node to be accessed, for example: Total access time of the node to be accessed x=n ( a+b ) +b, n Is the number of transmission cycles;

Of course, in the actual use process, the transmission duration can also be set by other methods, and this is not done here - repeating.

In this embodiment, the to-be-accessed node may send a wake-up signal consisting of consecutive sounding frames to the wireless sensor network in a back-to-back manner, including: a right to use the channel to be accessed by the node to be accessed; After obtaining the channel usage right, sending the first sounding frame; in an interval less than the channel detection time, repeatedly transmitting the sounding frame until the sending duration arrives;

Of course, in the actual use process, the to-be-accessed node may also send a wake-up signal consisting of consecutive sounding frames to the wireless sensor nodes on the network side by other means, and details are not described herein.

In this embodiment, the sounding frame may be configured as shown in FIG. 5, and the sounding frame may carry: preamble sequence information, frame length information, frame control segment information, beacon request information, receiving time, and CRC check. Information, etc., in the actual use process, the sounding frame may be in other forms, for example: the sounding frame may not include beacon request information, or receive time and other information, and is not performed in each case - .

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

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

It is to be noted 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 duty cycle information of the wireless sensor node, and the working cycle may specifically include the wireless sensor node. For the information of the dormant time slot and the monitoring time slot, the format of the beacon response frame may be as shown in FIG. 6 , and details are not described herein.

Step 203: The to-be-accessed node accesses the wireless sensor network by using the wireless sensor node according to the beacon response frame.

If, in the step 203, the to-be-accessed node receives the beacon response frame returned by the two or more wireless sensor nodes, the method may further include: the wireless sensor that the to-be-accessed node returns the beacon response frame from the two or more In the node, the target wireless sensor node is selected; in this case, the step 203 is specifically: accessing the sensor network by using the selected target sensor node according to the beacon response frame returned by the selected target wireless sensor node;

In this embodiment, the to-be-accessed node may select a target sensor node from two or more wireless sensor nodes that return a beacon response frame by using multiple methods, for example: the to-be-access node may select the first return beacon response. The wireless sensor node of the frame is the target wireless sensor node, and the wireless sensor node with the best performance is selected as the target wireless sensor node according to the performance of the wireless sensor node that returns the beacon response frame, and the details are not described herein. .

The method for accessing the network provided by the embodiment of the present invention, after the step 201, before the step 202, may further include: the wireless sensor node sends a wake-up response to the to-be-access node, and the to-be-access node receives the wake-up Answering; the step of the access node transmitting a beacon request frame to the wireless sensor node; If the to-be-accessed node receives the wake-up response returned by the two or more wireless sensor nodes, the method further includes: selecting, from the two or more wireless sensor nodes that return the wake-up response, the target wireless sensor node, where the The step of the ingress node transmitting the beacon request frame to the wireless sensor node is specifically: the to-be-access node 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 the wireless sensor nodes that return the wake-up response from two or more, and the specific implementation method and the wireless sensor node from the two or more return beacon response frames are selected. The steps of the target wireless sensor are basically the same, and will not be described 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 protocol, and the transmission duration is set according to the sleep time slot; if the sleep time slot of the wireless sensor node cannot be known in advance, If the transmission duration is set to an arbitrary value, the step 201 may send a wake-up signal composed of consecutive sounding frames during the transmission duration; if the step 202 to be accessed by the node does not receive the beacon returned by the wireless sensor node The response frame may further include: extending the transmission duration according to a preset transmission duration modification policy; and sending, by the extended transmission duration, a wake-up signal composed of consecutive sounding frames to the wireless sensor network, Until the access node receives the beacon response frame returned by the wireless sensor node or arrives at the access implementation;

In this embodiment, the sending duration modification policy may be to extend the sending duration to twice the previous sending, and the method for the access node to send the 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 to-be-accessed node may send a wake-up signal consisting of consecutive sounding frames to the wireless sensor network within a preset transmission duration, because the sending interval of the sounding frame is smaller than 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 that the wireless sensor node is woken up; since the probe frame can carry the beacon request information, the wireless sensor node can Sending a beacon response frame directly to the to-be-access node according to the node, saving signaling process and network communication resources of the access node to access the wireless sensor network; and the beacon response frame can carry and send the message The duty cycle information of the wireless sensor node of the response frame enables the node to be accessed to access the wireless sensor network through the wireless sensor node more quickly according to the information. The technical solution provided by the embodiment of the present invention improves the efficiency of the node accessing the wireless sensor network, and solves the problem that the sending gap of the beacon request frame sent by the to-be-accessed node to the network side is large in the prior art, resulting in long-term reception by the network side node. The beacon request frame is not available, and the efficiency of the node accessing the network is low, and even the access fails.

Corresponding to the above method, as shown in FIG. 8, the 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 composed of consecutive sounding frames in a preset transmission duration;

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

The access unit 803 is configured to access the network by using 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:

The storage unit 8011 is configured to store preset transmission period information.

The first sending subunit 8012 is configured to send, according to a sending period stored by the storage unit 8011, a wakeup signal composed of consecutive sounding frames during a transmission duration of each transmission period.

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

The modifying unit 804 is configured to extend the sending duration according to a preset sending 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 composed of consecutive sounding frames during the extended transmission duration.

Further, as shown in FIG. 10, the communication device 80 may further include: a first selecting unit 805, configured to: if the first receiving unit 802 receives a beacon response frame returned by two or more network nodes, select a target network node from the network nodes of the two or more return beacon response frames. ;

The access unit 803 is further configured to access the network by using 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 the wake-up response returned by the two or more network nodes, select the target network node from the two or more network nodes that return the wake-up response;

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 by the embodiment of the present invention, reference may be made to the method for accessing the network provided by the embodiment of the present invention, and details are not described herein again.

The device for accessing the network provided by the embodiment of the present invention may send a wake-up signal composed of consecutive sounding frames to the network side within a preset transmission duration, and the wake-up signal is composed of continuous sounding frames, thereby improving low-power work. The probability that the node in the network is awakened, thereby improving the efficiency of the node accessing the low-power network, and solving the problem that the transmission gap of the beacon request frame sent by the to-be-accessed node to the network side is large in the prior art, resulting in the network side The node does not receive the beacon request frame for a long time, and the node is less efficient in accessing the network, and even the access failure problem.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as ROM/RAM, magnetic. Disc or CD.

The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited. In this regard, any person skilled in the art can easily conceive changes or substitutions within the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

A method for accessing a network, comprising:

Sending a wake-up signal consisting of consecutive sounding frames during a preset transmission duration; receiving a beacon response frame returned by the network node;

Accessing the network through the network node according to the beacon response frame.

2. The method according to claim 1, wherein the sending the wake-up signal consisting of consecutive sounding frames in a preset transmission duration comprises:

A wake-up signal consisting of consecutive sounding frames is transmitted during the transmission duration of each transmission cycle in accordance with a preset transmission period.

The method according to claim 1, wherein if the beacon response frame returned by the network node is not received, the method further includes:

The transmission duration is extended according to a preset transmission duration modification policy; and a wakeup signal composed of consecutive sounding frames is transmitted during the extended transmission duration.

The method according to claim 1, wherein if the sounding frame carries a receiving time, the beacon response frame returned by the receiving network node is: at the receiving time, receiving a letter returned by the network node Standard response frame.

The method according to claim 1, wherein if the beacon response frame returned by the two or more network nodes is received, the method further includes:

Selecting a target network node from the network nodes that are two or more return beacon response frames; and the accessing the network through the network node according to the beacon response frame is:

And a beacon response frame returned by the selected target network node, and accessing the network by the selected target network node.

The method according to claim 1, after the sending of the wake-up signal consisting of consecutive sounding frames, before receiving the beacon response frame returned by the network node, the method further includes:

Receiving a wake-up response returned by the network node;

A beacon request frame is transmitted to the network node.

7. The method according to claim 6, wherein if the wake-up response returned by more than two network nodes is received, the method further includes:

Selecting a target network node from the two or more network nodes that return a wake-up response; and sending the beacon request frame to the network node is:

A beacon request frame is transmitted to the selected target network node.

The method according to any one of claims 1-7, wherein the sounding frame carries beacon request information and/or reception time.

The method according to any one of claims 1-7, wherein the beacon response frame returned by the network node carries a duty cycle of the network node.

10. A communication device, comprising:

a first sending unit, configured to send a wake-up signal composed of consecutive sounding frames during a preset transmission duration;

The device according to claim 10, wherein the first sending unit comprises: a storage unit, configured to store preset sending period information;

And a first sending subunit, configured to send, according to a sending period stored by the storage unit, a wakeup signal composed of consecutive sounding frames during a transmission duration of each transmission period.

12. The device according to claim 10, further comprising:

a modifying unit, configured to: if the first receiving unit does not receive the beacon response frame returned by the network node, extend the sending duration according to a preset sending duration modification policy;

The first sending unit is further configured to send a wake-up signal composed of consecutive sounding frames during the extended transmission duration.

13. The device according to claim 10, further comprising:

a first selecting unit, configured to: if the first receiving unit receives more than two network nodes to return a beacon response frame, selecting a target network node from the network nodes of the two or more return beacon response frames;

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

The device according to claim 10, further comprising:

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

And a second sending unit, configured to send a beacon request frame to the network node.

The device according to claim 14, further comprising:

a second selecting unit, configured to: if the second receiving unit receives the wake-up response returned by the two or more network nodes, select a target network node from the two or more network nodes that return the wake-up response; the second sending And the unit is further configured to send a beacon request frame to the target network node selected by the second selecting unit.