CN102811076B - Bluetooth connecting method - Google Patents

Abstract

The invention discloses a bluetooth connection method, which includes: taking the sending end as the current node; searching for all nodes that can be connected to the current node to generate a list of connectable devices; adding the current node to the connection path; Whether all child nodes of the node are target terminals; if yes, establish a Bluetooth connection; if not, use the child nodes of the current node as the new current node, and start recursive search based on the new current node. Users can connect to any remote Bluetooth device in the area covered by sufficient Bluetooth devices, which greatly expands the range of use of Bluetooth, making Bluetooth communication no longer limited to a short distance.

Description

Bluetooth connection method

technical field

The invention relates to a Bluetooth connection method, in particular to a Bluetooth long-distance connection method.

Background technique

Today's mobile phones are becoming more and more powerful, and Bluetooth has become a standard configuration. The communication method between mobile phones is no longer limited to GSM/GPRS, and Bluetooth also plays an important role in the wireless communication method of mobile phones. Bluetooth has the advantages of simple communication, fast transmission speed, and no network requirements. But at the same time, Bluetooth also has the disadvantage of short transmission distance.

Take the establishment of a simple Bluetooth connection between mobile phones as an example. At present, the Bluetooth transmission distance is generally only within 10M, but in reality, due to various interferences, the distance will be shorter. But it is impossible to realize direct long-distance Bluetooth device connection.

Therefore expect to find a kind of method that can realize long-distance bluetooth connection.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the defects in the prior art that the bluetooth connection distance is limited and the long-distance bluetooth connection cannot be realized, and to provide a way to realize the long-distance connection between bluetooth devices by means of multiple bluetooth device relays. Bluetooth connection method for connection.

The present invention solves the above technical problems through the following technical solutions:

A bluetooth connection method is characterized in that it comprises the following steps:

S _1. Set the sender as the current node and pass in the list of parent nodes;

S _2. Search for all nodes that the current node can connect to, and generate a list of connectable devices, and store all nodes that the current node can connect to in the list of connectable devices;

S _3. Remove nodes that are duplicated with the parent node list in the connectable device list;

S _4. Add the current node to the connection path;

S _5. Search how many child nodes are under the current node;

S _6. Circularly judge all child nodes of the current node, whether a certain child node of the current node is the target end; if yes, enter step S ₁₂ ; if not, enter step S ₇ ;

S _7. Search for all nodes that the current node can connect to, and store all the nodes that the current node can connect to in the connectable device list;

S _8. Use the child nodes of the current node as the new current node, and use the connectable device list as the parent node list;

S _9. Start a recursive search according to the new current node;

_S10 . Determine whether the recursive search is over, if yes, go to step _S11 ; if not, return to step S2 _;

S _11. The current node and its child nodes below do not have a target end, delete the tail node of the connection path, that is, the current node, and prompt that the target end is not found;

S _12. Find the target end, and determine the connection path between the sender end and the target end;

_S13 . The sending end sends a connection request to the target end according to the connection path determined in step _S12 ;

S _14. Determine whether the sending end has received the response connection information from the target end, if so, enter step S ₁₅ ; if not, prompt that the Bluetooth connection fails;

S ₁₅ . The sending end establishes a Bluetooth connection with the target end. Wherein, the sending end, the target end and the above-mentioned nodes are all Bluetooth devices.

Preferably, step _S13 also includes the following steps:

S _131. The sender sends a connection request to the current node;

S _132. The current node obtains connection request information;

S _133. Determine whether the current node is the target end, if not, enter step S ₁₃₄ ; if yes, enter step S ₁₃₆ ;

S _134. The current node sends the connection request to the next node of the current node in the connection path;

S _135. Use the next node of the current node in the connection path as the new current node and return to step S ₁₃₂ ;

S _{136. The} target end sends a response connection information.

Preferably, step _S15 also includes the following steps:

S _151. The target end sends response connection information to the current node;

S _152. The current node obtains the response connection information;

S _153. Determine whether the current node is the sending end, if not, enter step S ₁₅₄ ; if yes, enter step S ₁₅₆ ;

S _154. The current node sends the response connection information to the previous node of the current node in the connection path;

S _155. Use the previous node of the current node in the connection path as the new current node and return to step S ₁₅₂ ;

S _156. The sending end establishes a Bluetooth connection with the target end.

Preferably, after step _S15 , the following step is further included: storing the connection path between the sending end and the target end. In this way, it is convenient for the user to find the connection path when using the long-distance Bluetooth connection again.

The positive progress effect of the present invention is that the user can remotely connect any bluetooth device in the area covered by enough bluetooth devices, thereby greatly expanding the range of use of bluetooth, so that bluetooth communication is no longer limited to Within a shorter distance, it also provides more options for data transmission.

Description of drawings

FIG. 1 is a flow chart of the steps of searching for a target in the Bluetooth connection method of the present invention.

FIG. 2 is a flow chart of the steps of sending a connection request from the sending end to the target end in the Bluetooth connection method of the present invention.

FIG. 3 is a flow chart of steps in which the target end sends response connection information to the sender end in the Bluetooth connection method of the present invention.

detailed description

The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

With reference to Fig. 1, the step of searching target end in the bluetooth connection method of the present invention is as follows:

Step 100, take the sender as the current node, and pass in the list of parent nodes. At this time, since the sender is the starting node, there is no parent node, so the parent node list at this time is empty.

Step 101, searching for all nodes connectable to the current node, generating a list of connectable devices, and storing all nodes connectable to the current node into the list of connectable devices.

Step 102, remove nodes that are duplicated with the parent node list in the connectable device list.

Step 103, adding the current node to the connection path.

Step 104, searching how many child nodes there are under the current node.

Step 105, cyclically judge all child nodes of the current node, whether a child node of the current node is the target end? If yes, go to step 106; if not, go to step 107.

Step 106, find the target end.

Step 107, searching for all the nodes that the current node can connect to, and storing all the nodes that the current node can connect to in the connectable device list.

Step 108, use the child nodes of the current node as the new current node, and use the connectable device list as the parent node list.

Step 109, start a recursive search according to the new current node.

Step 110, judging whether the recursive search is over? If yes, go to step 111; if not, go back to step 101.

Step 111 , the current node and its child nodes below do not have a target end, and the tail node of the connection path, that is, the current node, is deleted.

Step 112, the target end is not found.

Referring to Figure 2, the steps for the sender to send a connection request to the target are as follows:

Step 200, the sender sends a connection request to the current node.

Step 201, the current node obtains connection request information.

Step 202, judge whether the current node is the target end, if yes, go to step 203; if not, go to step 204.

Step 203, the target end sends a response connection information.

Step 204, the current node sends the connection request to the next node of the current node in the connection path.

Step 205 , use the next node of the current node in the connection path as the new current node and return to step 201 .

Referring to Figure 3, the steps for the target end to send the response connection information to the sender end are as follows:

Step 300, the target end sends response connection information to the current node.

In step 301, the current node obtains response connection information.

Step 302, judge whether the current node is the sending end, if yes, go to step 303; if not, go to step 304.

Step 303, the sending end establishes a Bluetooth connection with the target end.

Step 304, the current node sends the response connection information to the previous node of the current node in the connection path.

Step 305 , take the previous node of the current node in the connection path as the new current node and return to step 301 .

The bluetooth connection method of the present invention will be described again below in conjunction with an application example, wherein the bluetooth device takes a mobile phone with a bluetooth module as an example, assuming that a bluetooth connection between mobile phone A and mobile phone D needs to be established, the specific implementation is as follows:

(1) Mobile phone A searches for mobile phone D through Bluetooth;

In described step (1), the step that mobile phone A searches mobile phone D by bluetooth comprises:

(1-1) Mobile phone A finds mobile phones A1, A2, ..., An (n is a natural number) by searching for Bluetooth devices;

(1-2) The mobile phone A, as the parent node, sends the device list it has searched to the child node devices A1, A2, ..., An (n is a natural number) in the device list in turn;

(1-3) Devices A1, A2, ..., An (n is a natural number) in the device list record their parent node mobile phone A after getting the list, and search for the devices they can find at the same time. Exclude the part in the list obtained before from the device, that is, remove the duplicate part, and get a list of its own child nodes, and at the same time merge the list of devices it has searched for with the list of devices it has searched for from the parent node into its own Search the list of devices, and repeat the actions of mobile phone A in the previous (1-2) until mobile phone D is found;

(1-4) The mobile phone D feeds back its own path (D) to the parent node D1. After receiving the feedback from the child node, the parent node D1 adds itself to the path (D1-D) and feeds back to its parent node. Click here The method has been fed back to node A, so as to obtain the path of A-...-D.

(2) Connect mobile phone A to mobile phone D via Bluetooth.

The step that mobile phone A and mobile phone D are carried out bluetooth connection in described step (2) comprises:

(2-1) Mobile phone A sends its own connection request and connection path to the next node mobile phone B according to the path A-...-D recorded by itself;

(2-2) node mobile phone B repeats the action of mobile phone A in (2-1);

(2-3) Cycle as above until cell phone D;

(2-4) Mobile phone D responds to the request of mobile phone A, and feeds back the connection response to mobile phone C according to the connection path;

(2-5) node mobile phone C repeats the action of mobile phone D in (2-4);

(2-6) Cycle as above until cell phone A;

(2-7) Mobile phone A establishes a connection with mobile phone D.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (4)

1. a Bluetooth connecting method, it is characterised in that it comprises the following steps:

S₁, using transmitting terminal as present node, and incoming father node list；

S₂, the search attachable all nodes of present node, and generate connectable device list, will be current The attachable all nodes of node are stored in this connectable device list；

S₃, remove in this connectable device list with father node list repeat node；

S₄, present node is added access path；

S₅, search present node under have how many child nodes, wherein, child node is for excluding father node list In node；

S₆, all child nodes of cycle criterion present node, if certain child node of present node is mesh Mark end；The most then enter step S₁₂、；If it is not, then enter step S₇；

S₇, the search attachable all nodes of present node, and by attachable for present node all nodes It is stored in this connectable device list；

S₈, using the child node of present node as new present node, and by this connectable device list make For father node list；

S₉, start recursive search according to new present node；

S₁₀, judge whether recursive search terminates, if so, enter step S₁₁、；If it is not, return step S₂；

S₁₁, present node and below child node there is not destination end, delete the afterbody node of access path, I.e. present node, and point out do not find destination end；

S₁₂, find destination end, and determine the access path between transmitting terminal and destination end；

S₁₃, transmitting terminal is according to step S₁₂The middle access path determined sends connection request to destination end；

S₁₄, judge whether transmitting terminal receives the response link information from destination end, if so, enter step S₁₅；If it is not, prompting bluetooth connection failure；

S₁₅, transmitting terminal set up be connected with the bluetooth between destination end.

2. Bluetooth connecting method as claimed in claim 1, it is characterised in that step S₁₃Also include with Lower step:

S₁₃₁, transmitting terminal send connection request to present node；

S₁₃₂, present node obtain connectivity request message；

S₁₃₃, judge whether present node is destination end, if it is not, enter step S₁₃₄；If so, step is entered Rapid S₁₃₆；

S₁₃₄, present node connection request is sent to the next node of present node in access path；

S₁₃₅, the next node of present node in access path as new present node and is returned step Rapid S₁₃₂；

S₁₃₆, destination end send response link information.

3. Bluetooth connecting method as claimed in claim 1, it is characterised in that step S₁₅Also include with Lower step:

S₁₅₁, destination end send response link information to present node；

S₁₅₂, present node obtain response link information；

S₁₅₃, judge whether present node is transmitting terminal, if it is not, enter step S₁₅₄；If so, step is entered Rapid S₁₅₆；

S₁₅₄, present node by response link information be sent to a upper joint of present node in access path Point；

S₁₅₅, a upper node of present node in access path as new present node and is returned step Rapid S₁₅₂；

S₁₅₆, transmitting terminal set up be connected with the bluetooth between destination end.

4. the Bluetooth connecting method as described in any one in claim 1-3, it is characterised in that step Rapid S₁₅The most further comprising the steps of: to store the access path between this transmitting terminal and this destination end.