WO2014101893A1 - 设备发现方法、装置及系统 - Google Patents

设备发现方法、装置及系统 Download PDF

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Publication number
WO2014101893A1
WO2014101893A1 PCT/CN2013/091174 CN2013091174W WO2014101893A1 WO 2014101893 A1 WO2014101893 A1 WO 2014101893A1 CN 2013091174 W CN2013091174 W CN 2013091174W WO 2014101893 A1 WO2014101893 A1 WO 2014101893A1
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WIPO (PCT)
Prior art keywords
monitoring
information
time
request message
listening
Prior art date
Application number
PCT/CN2013/091174
Other languages
English (en)
French (fr)
Inventor
关鑫
杜振国
方平
丁志明
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to EP13869358.5A priority Critical patent/EP2941057A4/en
Priority to JP2015549980A priority patent/JP5902876B2/ja
Priority to KR1020157018678A priority patent/KR20150094756A/ko
Publication of WO2014101893A1 publication Critical patent/WO2014101893A1/zh
Priority to US14/753,185 priority patent/US20150304262A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/07User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail characterised by the inclusion of specific contents
    • H04L51/18Commands or executable codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/005Discovery of network devices, e.g. terminals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information

Definitions

  • the present application claims priority to Chinese Patent Application No. 201210593557.1, filed on Dec. 31, 2012, the entire disclosure of which is hereby incorporated by reference.
  • the present invention relates to the Internet technology, and in particular, to a device discovery method, apparatus, and system.
  • WiFi Wireless Fidelity
  • AP Access Point
  • P2P peer-to-peer
  • the P2P device finds that there are multiple application scenarios, and the requirements for P2P device discovery are different in each scenario.
  • scenario 1 The user wants to find a certain game player.
  • the user requirement of the scene is to find the target device as soon as the terminal opens the P2P device discovery function, and then the P2P device discovery function can be turned off after the discovery;
  • scenario 2 the user subscribes For a service, the user requirement of the scenario is that the P2P device discovery function runs for a long time, and prompts the user when the service appears.
  • the P2P device of the prior art finds that the probe request message is sent on each of the three channels in an alternating manner of active search (search) and passive scan (listen), specifically, after transmitting a probe request message on one channel.
  • the channel waits for a period of time to receive the probe response message, and the waiting duration is a preset set of values, and each waiting time is randomly selected in the set of values, and after waiting for the end, the switch to the next channel to send the probe request message, and so on. carried out.
  • Embodiments of the present invention provide a device discovery method, apparatus, and system to improve device discovery efficiency.
  • an embodiment of the present invention provides a device discovery method, including: sending a probe request message on a set transmit channel, where the probe request message carries local device monitoring rule information, and the interception rule information At least the monitoring time information and/or the monitoring channel information are included; and the message sent by other devices is monitored according to the monitoring law information.
  • the sending the probe request message on the set sending channel includes: sending the probe request message on a set channel, or at least two settings The channel sequentially transmits the probe request message.
  • the monitoring, according to the monitoring rule information, the message sent by the other device is: according to the monitoring rule information, in a channel Listen to messages sent by other devices, or listen to messages sent by other devices in sequence on at least two channels.
  • the monitoring time information in the monitoring rule information includes: The interval between the start of the next listening start, the listening duration, and/or the interval between two adjacent listens.
  • the message sent by the other device includes: listening to the probe response message and/or the probe request message sent by other devices according to the monitoring rule information.
  • the interval between sending the probe request message twice is a first duration
  • the listening duration in the interception rule information is a second duration
  • the first duration is less than the second duration
  • the first to the fifth possible implementation manner of the first aspect in a sixth possible implementation manner of the first aspect, Enter sleep time.
  • the method further includes: according to the monitoring rule information, during the sleep time, the local device wakes up in the set at least one listening window time, and listens to messages sent by other devices.
  • the second aspect of the present invention provides a device discovery method, including: receiving a probe request message sent by another device, where the probe request message carries monitoring rule information, where the monitoring rule information includes monitoring time information and/or monitoring The channel information is sent according to the monitoring rule information carried in the probe request message, and the probe response message is sent at the listening time and/or the listening channel.
  • the embodiment of the present invention provides a device discovery sending apparatus, including: a detecting module, configured to send a probe request message on a set sending channel, where the probe request message carries the monitoring law information of the local device
  • the monitoring rule information includes at least monitoring time information and/or monitoring channel information.
  • the monitoring module is configured to listen to messages sent by other devices according to the monitoring law information.
  • the detecting module is specifically configured to: send the probe request message on a set channel, or send the probe request in sequence on at least two channels set Message.
  • the monitoring module is specifically configured to: monitor, according to the monitoring rule information, a message sent by another device on a channel, or The set at least two channels sequentially listen to messages sent by other devices.
  • the monitoring time information in the monitoring rule information includes: The interval between the start of the next listening start, the listening duration, and/or the interval between two adjacent listens.
  • the monitoring module is specifically configured to: The monitoring rule information is monitored, and the probe response message and/or the probe request message sent by other devices are monitored.
  • the interval between sending the probe request message twice is a first duration
  • the listening duration in the interception rule information is a second duration
  • the first duration is less than the second duration
  • the first to the fifth possible implementation manner of the third aspect in a sixth possible implementation manner of the third aspect, Listen to the regular information and enter the sleep time.
  • the method further includes: a listening window module, configured to perform the setting in the sleep time according to the monitoring rule information The local machine wakes up at least one listening window time and listens to messages sent by other devices.
  • the embodiment of the present invention provides a second device discovery device, including: a receiving module, configured to receive a probe request message sent by another device, where the probe request message carries monitoring rule information, where the monitoring rule information includes Listening time information and/or listening channel information; a response module, configured to send a probe response message at the listening time and/or the listening channel.
  • the fifth aspect provides a device discovery system, including: the first device discovery device according to any one of the possible implementation manners of at least one third aspect, and the second device according to at least one fourth aspect Device discovery device.
  • the device discovery method, device, and system provided by the embodiment of the present invention, when the probe request message is sent, carries the interception rule information of the local device to receive the probe response message, so that the target device can receive the probe request message according to the interception rule. Information, sending probe response messages on valid time and on a valid channel, improving device discovery efficiency.
  • Embodiment 1 is a flowchart of Embodiment 1 of a device discovery method according to the present invention
  • Embodiment 2 is a flowchart of Embodiment 2 of a device discovery method according to the present invention
  • Embodiment 3 is a signaling flowchart of Embodiment 3 of a device discovery method according to the present invention.
  • Embodiment 4 is a signaling flowchart of Embodiment 4 of a device discovery method according to the present invention.
  • Embodiment 5 is a signaling flowchart of Embodiment 5 of a device discovery method according to the present invention.
  • Embodiment 1 of a first device discovery device is a schematic structural diagram of Embodiment 1 of a first device discovery device according to the present invention.
  • Embodiment 7 is a schematic structural diagram of Embodiment 2 of a first device discovery device according to the present invention.
  • Embodiment 8 is a schematic structural diagram of Embodiment 1 of a second device discovery device according to the present invention.
  • Embodiment 3 of a first device discovery device is a schematic structural diagram of Embodiment 3 of a first device discovery device according to the present invention.
  • FIG. 10 is a schematic structural diagram of Embodiment 2 of a second device discovery device according to the present invention.
  • the detailed description of the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.
  • the device involved in the embodiments of the present invention may be a P2P device, and may be any device that has a Wireless Fidelity (WiFi) function and can carry a P2P application.
  • the specific form may be a mobile phone. Laptops, tablets, and personal digital assistants (PDAs).
  • PDAs personal digital assistants
  • the device discovery method involves the interaction between the at least two P2P devices.
  • the first device represents a party that actively detects other devices
  • the second device represents a target device to be discovered.
  • FIG. 1 is a flowchart of Embodiment 1 of a device discovery method according to the present invention.
  • the execution body of this embodiment is a first device.
  • the method can be implemented by any P2P device. As shown in FIG. 1, the method in this embodiment may include:
  • Step 101 Send a probe request message on the set sending channel, where the probe request message carries the monitoring rule information of the local device, where the monitoring rule information includes at least the monitoring time information and/or the monitoring channel information.
  • the P2P device can send messages on these three channels or listen to messages of other P2P devices.
  • a probe request message is sent on one channel, and the channel is monitored for a period of time, and then the probe request message is sent to the next channel, and the channel is monitored for a period of time, so that the probe request message is sent on three channels in turn. And listening.
  • the first device when the first device sends the probe request message, the first device carries the monitoring rule information of the local device to receive the probe response message, so that the second device can respond according to the monitoring rule information.
  • the listening rule of the first device can be unrestricted, and can be set according to the specific requirements of the scenario that the P2P device application needs to satisfy, for example, some applications need to discover multiple target devices, and need to run for a long time, and here During the period, the device also needs to provide communication functions such as calling, texting, etc.
  • the monitoring rule can be designed as a power saving solution, for example.
  • the listening time can be designed to be relatively short, and the interval between two adjacent listening periods can be relatively long. Further, the first device can be put into a sleep state during the interval to save power of the device.
  • the listening time indicates the time when the first device is in the working state and can receive messages sent by other devices. In addition to the listening time, it may be a dormant state, or may be a state in which no message is received but not received, and the present invention does not limit this.
  • the probe request message may carry the monitoring rule information of the local device, and may also carry the sending rule information of the local device, so that the second device that receives the probe request message may receive according to the sending rule information. Subsequent news.
  • Step 102 Monitor, according to the monitoring rule information, a message sent by another device.
  • the messages of other devices may be monitored on the set channel during the set listening time. At other times, the first device can go to sleep to reduce power consumption.
  • the interception rule information of the probe response message is received by the local device, so that after receiving the probe request message, the target device can be based on the interception rule information, at a valid time and a valid channel. Send a probe response message to improve the accuracy of device discovery and the efficiency of discovery.
  • the first device may send a probe request message on a set channel, or send the probe request message sequentially on the set two or three channels. .
  • the first device may monitor the probe response message sent by other devices in one channel according to the monitoring rule information, or sequentially monitor the messages sent by other devices on the set two or three channels.
  • the first device may send a probe request message on a set channel, and sequentially maintain a continuous listening time on three channels to listen to messages sent by other devices; or, in sequence, three channels.
  • a probe request message is sent, and a message sent by another device is monitored on a set channel.
  • the monitoring time information in the monitoring rule information may include: an interval between a current time to a next monitoring start time, a listening duration, and/or a time interval between adjacent monitoring.
  • the current time may be the time at which the probe request message is sent
  • the listening duration may be the length of time for the next monitoring.
  • a preferred scheme is to monitor the regular information.
  • the interval between the current time and the next monitoring start time and the listening duration are long, and since the wireless transmission time is short, it can be ignored. Therefore, the second device receiving the detection request message can receive the detection according to the detection. The time at which the message is requested and the interval are obtained at the start time of the next listening of the first device. In combination with the duration of the next monitoring, the second device receiving the probe request message can accurately send the probe response message within the latest persistent listening period of the first device.
  • listening to the message sent by the other device may include: listening for a probe response message and a probe request message sent by other devices.
  • sending the probe request message on the set channel comprises: periodically and/or aperiodically transmitting the probe request message on the set transmission channel.
  • the process of the first device listening to the message sent by the other device may be set to a certain period, so that the monitoring is performed periodically; the process of sending the probe request message may be sent in a certain time period by a preset number of times. Execution, the interval between sending the probe request messages twice may be set to be randomly selected within a certain range, so as to prevent each device from transmitting the probe request message synchronously in the same period. On the basis of this, the interval between two adjacent detection request messages may be set to a first duration, the first duration is randomly changed within a certain range, and the monitoring duration is a second duration.
  • the first duration may be controlled to be less than the second duration to ensure that at least two probe request messages are sent during a continuous listening period defined by the listening duration, that is, there are two chances of receiving probe response messages of other devices. Thereby improving the accuracy of the discovery.
  • FIG. 2 is a flowchart of Embodiment 2 of a device discovery method according to the present invention.
  • the execution body of this embodiment is a first device.
  • the method in this embodiment may include:
  • Step 201 Send a probe request message on the set sending channel, where the probe request message carries the monitoring rule information of the local device, where the monitoring rule information includes at least the monitoring time information and/or the monitoring channel information.
  • Step 202 Monitor, according to the monitoring rule information, a message sent by another device.
  • Step 203 Enter the sleep time according to the monitoring rule information.
  • the first device may set a time range according to the requirements of each application, in which the time other than the monitoring time is set as the sleep time, and during the sleep time, the first device still presses the predetermined time.
  • the law awakens the local machine and sends a probe request message within a set period of time, and the other time is in a sleep state, and the power consumption is extremely small. It should be noted that, this is only one of the preferred solutions, and the specific embodiment of the present invention is not limited. For example, it can also be set to set the sleep time in the interval of the listening time, and also set part of the time period, and do not sleep or receive messages of other devices.
  • Step 204 According to the monitoring rule information, during the sleep time, wake up the local machine in at least one of the set listening window times, and listen to the message sent by other devices.
  • the sleep time accounts for a large proportion in the entire time range, that is, the first device is in a sleep state for most of the time, and cannot receive the message sent by other devices, which is beneficial to the power saving of the first device, but also The efficiency of the discovery is too low, and some monitoring windows can be set during the sleep time to resolve this contradiction.
  • the information of the listening window can also be carried in the probe request message in step 201 to inform other devices.
  • the listening window may be set to enter the listening window immediately after each transmission of the probe request message, so as to send a probe response message immediately after another device receives the probe request message sent by the first device.
  • the listening window information of the scheme may not be carried in the probe request message.
  • the listening window time can also be set in the active state time, for example, when a part is set, neither sleep nor receive.
  • the listening window time can be set during these time periods.
  • Step 205 When receiving the probe response message sent by the other device in the listening window time, the interaction with the device that sends the probe response message is preferentially performed.
  • the duration of the listening window is generally set to be short, if the message sent by other devices is monitored in the listening window, for example, the probe response message sent by other devices is monitored, or the probe request message sent by other devices is monitored and the requirements of the other device are met.
  • the listening window time is not enough for the local device to interact with the other device.
  • the time of the listening window can be extended to perform further information interaction with the other device, such as negotiation configuration, authentication, and connection.
  • a preset time may be set. If the subsequent message is not received within the preset time, the sleep may be re-entered.
  • step 205 is not limited to waking up the local device from the sleep state when the listening window receives the message of the other device, but may be prioritized when receiving the message of the other device at any stage.
  • the interaction of other devices For example, receiving other settings
  • the standby message is just ending when the listening time is about to end, that is, when the sleep state is about to enter, or when the listening time is insufficient to complete the information interaction with the other device, the length of the listening time can be extended until the information interaction with the other device is completed.
  • the process of step 201 to step 205 described above may be re-executed, otherwise, the discovery process may be exited.
  • the embodiment of the present invention simulates the solution of the embodiment and the solution of the prior art, and compares the length of time required for other devices.
  • the parameters of the two P2P devices are simulated as follows: the probe request message is sent for 0.4 milliseconds, the transmit power is 50 milliwatts, and the monitor power is 25 milliwatts.
  • the prior art scheme is named as scheme one.
  • the listening time of the first scheme is a random value of 100ms, 200ms, and 300ms, and the average listening period is 200ms.
  • two schemes are respectively used, and one scheme 2 is: sending a probe request message on a set channel, and sequentially maintaining a continuous listening time on the three channels to listen for the probe response message sent by other devices, in order to Compared with the scheme one, the monitoring period is also set to 200ms; the other is scheme three: sending the probe request message on three channels in turn, and listening to the probe response message sent by other devices on one channel set, in order to be fair with the scheme For comparison, the listening period is also set to 200ms.
  • the start time in the three schemes is set to any moment in the discovery process, and the end time is the time at which any one of the two P2P devices receives the probe response message.
  • the number of simulation runs is 100,000 times, and the time step is 200ms.
  • the simulation results show that the second time is slightly better than the first one in the discovery time, and the discovery time of the third is far less than the first one.
  • the probability of finding the solution in 200 ms is more than 99%, and the probability of finding the solution in 200 milliseconds is less than 72%; the average discovery time of the third solution is 45 ms.
  • the average discovery time for scenario 1 is 160 ms. Therefore, it is obvious that the scheme of the present embodiment (sending the probe request message on three channels in turn, and monitoring the probe response message sent by other devices on one channel set) is much more efficient than the prior art discovery scheme. .
  • the power consumption of the device discovery program is reduced.
  • the efficiency of the discovery is improved, and the device is shortened.
  • the wake-up mechanism facilitates timely information interaction with the target device, so that the entire discovery process is completed in the shortest time.
  • FIG. 3 is a flowchart of Embodiment 3 of a device discovery method according to the present invention.
  • the execution body of this embodiment is a second device.
  • the method can be performed by any P2P device. As shown in FIG. 3, the method in this embodiment includes:
  • Step 301 Receive a probe request message sent by another device, where the probe request message carries monitoring rule information, where the monitoring rule information includes monitoring time information and/or monitoring channel information.
  • the executor of the present embodiment is the second device, that is, the target device to be discovered; the other device in the step 301 may correspond to the first device, that is, the device that is actively detected, and the monitoring rule information carried in the probe request message. It is also the monitoring rule information of the first device.
  • the monitoring rule information may be the same as or different from the monitoring law information of the device.
  • Step 302 Send a probe response message on the listening time and/or the listening channel according to the monitoring rule information carried in the probe request message.
  • the second device sends a probe response message according to the listening rule of the first device, for example, determining a timing and a sending channel for sending the probe response message according to the monitoring rule information carried in the received probe request message.
  • the first device can be guaranteed to successfully receive the probe response message.
  • the two devices can then perform further information interactions until they find each other.
  • the probe request message carrying the monitoring rule information sent by the other device is received, and the probe response message is sent to the device according to the monitoring rule information, so that the sent probe response message is successfully received, thereby improving device discovery. effectiveness.
  • FIG. 4 is a signaling flowchart of a method for discovering a device according to a fourth embodiment of the present invention.
  • the method for discovering the two devices is the same in the present embodiment.
  • the first device is mainly described.
  • the figure uses slash shadows, spot shadows, and cross-hatching to represent three different channels, and the gray padding represents the sleep state.
  • the channels used by the two devices for listening can be the same or different.
  • the short arrow in the figure indicates that the probe request message is sent periodically.
  • the method in this embodiment may include:
  • Step 401 The first device sends a probe request message on the three channels in sequence, where the probe request message carries the monitoring rule information of the local device, where the monitoring rule information includes the monitoring time information and the monitoring channel information.
  • Step 402 The first device monitors, according to the monitoring rule information, a message sent by another device on a set channel, and enters a sleep time according to the monitoring rule information, and monitors Listen to the window time.
  • Step 403 The first device receives a probe response message sent by another device by using a listening channel during the sleep time in the sleep time.
  • Step 404 When receiving the probe response message sent by the second device at the listening window time, extending the time of the listening window to interact with the second device.
  • power saving is implemented by adding a sleep time in the device discovery process; the discovery process is more effective by a long-term listening window.
  • the solution of the embodiment is simulated, and multiple combinations of different sleep periods and different lengths of monitoring time are simulated, and the corresponding average time is observed.
  • Average power consumption The simulation results show that when the continuous listening time is selected as 400ms and the sleep time is 2s, the average discovery time is 600ms when the listening window is not set, and the average power consumption is 50mw, which saves compared with the prior art discovery scheme. 80% of power consumption.
  • FIG. 5 is a signaling flowchart of Embodiment 5 of the device discovery method of the present invention.
  • the discovery method used by the two devices is the same in this embodiment.
  • the first device is mainly described.
  • the figure shows three different channels with slash shadows, spot shadows, and cross-hatching, respectively, and fills with gray to represent the sleep state.
  • the channels used by the two devices to send probe request messages may be the same or different.
  • a short arrow is used in the figure to periodically send a probe request message.
  • the method of this embodiment may include:
  • Step 501 The first device sends a probe request message on a set channel, where the probe request message carries the monitoring rule information of the local device, where the monitoring rule information includes the monitoring time information and the monitoring channel information.
  • Step 502 The first device sequentially listens to messages sent by other devices on the three channels according to the monitoring rule information, and enters a sleep time and a listening window time according to the monitoring rule information.
  • Step 503 The first device receives, in the listening time, a probe response message sent by the second device according to the monitoring rule information on the corresponding listening channel.
  • Step 504 If the first device is receiving the probe response message sent by the second device, when the listening time of the channel is about to end, the listening time of the channel is extended to interact with the second device.
  • the scenario of step 504 may be: when receiving the probe response message sent by the second device, the first device is about to enter the sleep state according to the set listening rule, or is about to change the channel for monitoring, and then receives the other device to send.
  • the probe response message can extend the listening time of the channel to complete the interaction with the second device.
  • the local device wakes up from the sleep state and interacts with the second device.
  • power saving is implemented by adding a sleep time in the device discovery process; the monitoring time on the channel can be extended by receiving the probe response message, thereby making the discovery process more efficient.
  • FIG. 6 is a schematic structural diagram of Embodiment 1 of a first device discovery device according to the present invention.
  • the device 600 of this embodiment may include: a detection module 11 and a monitoring module 12, where the detection module 11 is used for setting Sending a probe request message on the sending channel, where the probe request message carries the monitoring rule information of the local device, where the monitoring rule information includes at least the monitoring time information and/or the monitoring channel information; Listen to the regular information and listen for probe response messages sent by other devices.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 , and has a corresponding function module, and the implementation principle thereof is similar, and details are not described herein again.
  • the apparatus of this embodiment when transmitting the probe request message, carries the interception rule information of the local device to receive the probe response message, so that after receiving the probe request message, the target device can be valid and valid according to the interception rule information.
  • the probe response message is sent on the channel to improve the accuracy of the device discovery and the efficiency of the discovery.
  • the detecting module 11 is configured to: send the probe request message on a set channel, or send the probe request message sequentially on at least two channels set in a specific implementation. .
  • the monitoring module 12 is specifically configured to: monitor, according to the monitoring rule information, a message sent by another device on one channel, or sequentially listen to other channels in at least two channels set. The message sent by the device.
  • the monitoring time information in the monitoring rule information includes: an interval between a current time and a next monitoring start time, a listening duration, and/or two adjacent monitoring. The time interval between.
  • the monitoring module 12 is specifically configured to: monitor, according to the monitoring rule information, a probe response message sent by another device, and/or a probe request cancellation. Interest.
  • the interval between sending the probe request message twice is a first duration
  • the listening duration in the interception rule information is a second.
  • the duration, and the first duration is less than the second duration.
  • FIG. 7 is a schematic structural diagram of Embodiment 2 of the first device discovery device of the present invention.
  • the device 700 of the present embodiment may further include: a sleep module 13 on the basis of the device structure shown in FIG. And the listening window module 14, wherein the hibernation module 13 is configured to enter a sleep time according to the monitoring rule information; and the listening window module 14 is configured to: according to the monitoring law information, during the sleep time, at least The unit wakes up during a listening window and listens to messages sent by other devices.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and has corresponding functional modules.
  • the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of Embodiment 1 of a second device discovery device according to the present invention.
  • the apparatus 800 of this embodiment includes: a receiving module 21 and a response module 22, wherein the receiving module 21 is configured to receive a probe request message sent by another device, where the probe request message carries interception rule information,
  • the monitoring rule information includes the monitoring time information and/or the monitoring channel information.
  • the response module 22 is configured to send the probe response message on the listening time and/or the listening channel according to the monitoring law information carried in the sounding request message.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3, and has a corresponding function module, and the implementation principle thereof is similar, and details are not described herein again.
  • the apparatus of this embodiment receives a probe request message that carries the monitoring rule information sent by another device, and sends a probe response message to the device according to the interception rule information, so as to ensure that the sent probe response message is successfully received, thereby improving the device. Discovered efficiency.
  • FIG. 9 is a schematic structural diagram of Embodiment 3 of a first device discovery device according to the present invention.
  • the first device discovery device 900 of this embodiment includes: at least one CPU 901, at least one network interface 902, a memory 903, and at least one communication bus 904.
  • Communication bus 904 is used to implement connection communication between components.
  • the memory 903 may include a high speed RAM memory, and may also include a non-volatile memory (hereinafter referred to as N-VM), such as at least one disk memory.
  • N-VM non-volatile memory
  • the memory 903 can optionally include at least one storage device, store various codes, and the like for implementing various basic services and processing hardware-based tasks.
  • the CUP 901 performs the following actions according to the instruction of the code stored in the memory 903: Sending a probe request message on the predetermined sending channel, where the probe request message carries the monitoring rule information of the local device, where the monitoring rule information includes at least the monitoring time information and/or the monitoring channel information; according to the monitoring law information, Listen for probe response messages sent by other devices.
  • the CPU 901 is further configured to: send the probe request message on a set channel, or send the probe request message sequentially on at least two channels set; and monitor other channels on one channel according to the monitoring rule information.
  • the message sent by the device, or the message sent by the other device is sequentially monitored on at least two channels set;
  • the monitoring time information in the monitoring rule information includes: an interval between the current time and the next monitoring start time, and the monitoring duration And a time interval between the two or two adjacent listeners; listening to the probe response message and the probe request message sent by the other device according to the monitoring rule information; and the interval between sending the probe request message twice
  • the listening duration in the monitoring rule information is a second duration, and the first duration is less than the second duration; according to the monitoring rule information, entering a sleep time; according to the monitoring law information, During the sleep time, the unit wakes up during the set at least one listening window time, and listens to it.
  • Message sent by the device is sequentially monitored on at least two channels set;
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 or FIG. 2 and the technical solution corresponding to the first device in the embodiment shown in FIG. 3 or FIG. 4, and the implementation principle and technical effect are similar. , will not repeat them here.
  • FIG. 10 is a schematic structural diagram of Embodiment 2 of a second device discovery device according to the present invention.
  • the second device discovery apparatus 1000 of this embodiment includes: at least one CPU 1001, at least one network interface 1002, a memory 1003, and at least one communication bus 1004.
  • the communication bus 1004 is used to implement connection communication between components.
  • the memory 1003 may include a high speed RAM memory, and may also include a non-volatile memory (hereinafter referred to as N-VM), such as at least one disk memory.
  • N-VM non-volatile memory
  • the memory 1003 can optionally include at least one storage device, store various codes, and the like for implementing various basic services and processing hardware-based tasks.
  • the CUP 1001 performs the following actions according to the indication of the code stored in the memory 1003: receiving a probe request message sent by another device, where the probe request message carries the monitoring rule information, where the monitoring rule information includes the monitoring time information and/or the monitoring channel. Information: sending a probe response message at the listening time and/or the listening channel according to the monitoring rule information carried in the probe request message.
  • the device of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3 and
  • the technical solution of the second device in the embodiment shown in FIG. 3 or FIG. 4 is similar to the technical solution, and details are not described herein again.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the above-described method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种设备发现方法、装置及系统。其中,方法包括:在设定的发送信道上发送探测请求消息,其中,所述探测请求消息中携带本机的监听规律信息,所述监听规律信息至少包括监听时间信息和/或监听信道信息(101);根据所述监听规律信息,监听其他设备发送的探测响应消息(102)。本发明实施例提供的设备发现方法、装置及系统,可以提高设备发现的效率。

Description

设备发现方法、 装置及系统
本申请要求于 2012年 12月 31 日提交中国专利局、 申请号为 201210593557.1中国专利申请的优先权,其全部内容通过引用结合在本申请 中。 技术领域 本发明实施例涉及互联网技术, 尤其涉及一种设备发现方法、 装置及 系统。
背景技术 随着无线保真( Wireless Fidelity, 简称: WiFi )技术在各个行业的广 泛应用, WiFi网絡的接入点(Access Point, 简称: AP )遍布于酒店、 咖 啡厅、 学校商城等场所, 近年来已经基于 WiFi发展出了社交 WiFi ( Social WiFi )的各种应用程序和产品,其中一个重要的应用就是点对点( Peer to Peer, 简称: P2P )设备发现。
P2P设备发现有多种应用场景, 而各场景中用户对 P2P设备发现的需 求是不同的。 例如, 场景 1 : 用户想要找到某个游戏玩家, 该场景的用户 需求是在终端打开 P2P设备发现功能后尽快发现目标设备, 发现后即可 关闭 P2P设备发现功能; 场景 2: 用户订制了某个服务, 该场景的用户需 求是 P2P设备发现功能长期运行, 当服务出现时提示用户。
现有技术的 P2P设备发现,釆用主动扫描( Search )和被动扫描( listen ) 交替进行的方式, 分别在三条信道上各发送一次探测请求消息, 具体地, 在一个信道发送探测请求消息后在该信道等待一段时间来接收探测响应 消息, 等待的时长为预设的一组数值, 每次等待的时间在该组数值中随 机选择, 等待结束后切换到下一个信道发送探测请求消息, 如此循环执 行。
但是这种 P2P设备发现的方法效率不高, 非常耗电, 尤其是对于上 述的场景 2 , 如果用户需要长期使用 P2P设备发现的功能, 将会很快耗 尽终端的电量, 从而不便于用户使用。 发明内容 本发明实施例提供一种设备发现方法、 装置及系统, 以提高设备发现 的效率。
第一方面, 本发明实施例提供一种设备发现方法, 包括: 在设定的发 送信道上发送探测请求消息, 其中, 所述探测请求消息中携带本机的监听 规律信息, 所述监听规律信息至少包括监听时间信息和 /或监听信道信息; 根据所述监听规律信息, 监听其他设备发送的消息。
在第一方面的第一种可能的实现方式中, 所述在设定的发送信道上发 送探测请求消息包括: 在设定的一条信道发送所述探测请求消息, 或在设 定的至少两条信道依次发送所述探测请求消息。
根据第一方面的第一种可能的实现方式, 在第二种可能的实现方式中, 所述根据所述监听规律信息, 监听其他设备发送的消息包括: 根据所述监 听规律信息, 在一条信道监听其他设备发送的消息, 或在设定的至少两条 信道依次监听其他设备发送的消息。
根据第一方面、 第一方面的第一种或第二种可能的实现方式, 在第一 方面的第三种可能的实现方式中, 所述监听规律信息中的监听时间信息包 括: 从当前时刻到下一次监听开始时刻之间的间隔、 监听时长和 \或相邻两 次监听之间的时间间隔。
根据第一方面、 第一方面的第一种至第三种可能的实现方式中的任意 一种, 在第一方面的第四种可能的实现方式中, 所述根据所述监听规律信 息, 监听其他设备发送的消息包括: 根据所述监听规律信息, 监听其他设 备发送的探测响应消息和 \或探测请求消息。
根据第一方面的第三种可能的实现方式, 在第五种可能的实现方式中, 相邻两次发送所述探测请求消息的间隔为第一时长, 所述监听规律信息中 的监听时长为第二时长, 且所述第一时长小于所述第二时长。
根据第一方面、 第一方面的第一种至第五种可能的实现方式中的任意 一种, 在第一方面的第六种可能的实现方式中, 还包括: 按照所述监听规 律信息, 进入休眠时间。
根据第一方面的第六种可能的实现方式, 在第七种可能的实现方式中, 还包括: 按照所述监听规律信息, 在所述休眠时间内, 在设定的至少一个 监听窗口时间内将本机唤醒, 监听其他设备发送的消息。
第二方面, 本发明实施例提供一种设备发现方法, 包括: 接收其他设 备发送的探测请求消息, 所述探测请求消息中携带监听规律信息, 所述监 听规律信息包括监听时间信息和 /或监听信道信息; 根据所述探测请求消息 中携带的监听规律信息,在所述监听时间和 /或监听信道发送探测响应消息。
第三方面, 本发明实施例提供一种设备发现发送装置, 包括: 探测模 块, 用于在设定的发送信道上发送探测请求消息, 其中, 所述探测请求消 息中携带本机的监听规律信息, 所述监听规律信息至少包括监听时间信息 和 /或监听信道信息; 监听模块, 用于根据所述监听规律信息, 监听其他设 备发送的消息。
在第三方面的第一种可能的实现方式中, 所述探测模块具体用于: 在 设定的一条信道发送所述探测请求消息, 或在设定的至少两条信道依次发 送所述探测请求消息。
根据第三方面的第一种可能的实现方式, 在第二种可能的实现方式中, 所述监听模块具体用于: 根据所述监听规律信息, 在一条信道监听其他设 备发送的消息, 或在设定的至少两条信道依次监听其他设备发送的消息。
根据第三方面、 第三方面的第一种或第二种可能的实现方式, 在第三 方面的第三种可能的实现方式中, 所述监听规律信息中的监听时间信息包 括: 从当前时刻到下一次监听开始时刻之间的间隔、 监听时长和 \或相邻两 次监听之间的时间间隔。
根据第三方面、 第三方面的第一种至第三种可能的实现方式中的任意 一种, 在第三方面的第四种可能的实现方式中, 所述监听模块具体用于: 根据所述监听规律信息, 监听其他设备发送的探测响应消息和\或探测请求 消息。
根据第三方面的第三中可能的实现方式, 在第五种可能的实现方式中, 相邻两次发送所述探测请求消息的间隔为第一时长, 所述监听规律信息中 的监听时长为第二时长, 且所述第一时长小于所述第二时长。
根据第三方面、 第三方面的第一种至第五种可能的实现方式中的任意 一种, 在第三方面的第六种可能的实现方式中, 还包括: 休眠模块, 用于 按照所述监听规律信息, 进入休眠时间。 根据第三方面的第六种可能的实现方式, 在第七种可能的实现方式中, 还包括: 监听窗口模块, 用于按照所述监听规律信息, 在所述休眠时间内, 在设定的至少一个监听窗口时间内将本机唤醒, 监听其他设备发送的消息。
第四方面, 本发明实施例提供一种第二设备发现装置, 包括: 接收模 块, 用于接收其他设备发送的探测请求消息, 所述探测请求消息中携带监 听规律信息, 所述监听规律信息包括监听时间信息和 /或监听信道信息; 响 应模块, 用于在所述监听时间和 /或监听信道发送探测响应消息。
第五方面, 本发明实施例提供一种设备发现系统, 包括: 至少一个第 三方面中的任意一种可能的实现方式所述的第一设备发现装置以及至少一 个第四方面所述的第二设备发现装置。
本发明实施例提供的设备发现方法、 装置及系统, 通过在发送探测请 求消息时携带本机接收探测响应消息的监听规律信息, 使目标设备在接收 到该探测请求消息后, 能够根据该监听规律信息, 在有效的时间及有效的 信道上发送探测响应消息, 提高设备发现的效率。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明设备发现方法实施例一的流程图;
图 2为本发明设备发现方法实施例二的流程图;
图 3为本发明设备发现方法实施例三的信令流程图;
图 4为本发明设备发现方法实施例四的信令流程图;
图 5为本发明设备发现方法实施例五的信令流程图;
图 6为本发明第一设备发现装置实施例一的结构示意图;
图 7为本发明第一设备发现装置实施例二的结构示意图;
图 8为本发明第二设备发现装置实施例一的结构示意图;
图 9为本发明第一设备发现装置实施例三的结构示意图;
图 10为本发明第二设备发现装置实施例二的结构示意图。 具体实 式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明各实施例中涉及的的设备可以为 P2P设备, 具体地, 可以为任 何具有无线保真 (Wireless Fidelity, 简称: WiFi ) 功能、 且能够承载 P2P 应用程序的设备, 具体形式可以是手机、 笔记本电脑、 平板电脑和个人数 字助理( Personal Digital Assistant, 简称: PDA )等。 由于设备发现方法涉 及至少两个 P2P设备之间的交互, 为了便于描述, 本发明各实施例中用第 一设备代表主动探测其他设备的一方, 用第二设备代表待发现的目标设备。
图 1 为本发明设备发现方法实施例一的流程图, 本实施例的执行主体 为第一设备。 该方法可以由任意 P2P设备实现, 如图 1所示, 本实施例的 方法可以包括:
步骤 101、 在设定的发送信道上发送探测请求消息, 其中, 所述探测请 求消息中携带本机的监听规律信息, 所述监听规律信息至少包括监听时间 信息和 /或监听信道信息。
目前, 可以供社交 WiFi ( Social WiFi )使用的信道有三条, 分别为信 道 1、信道 6和信道 11。 P2P设备可以在这三条信道上发送消息或监听其他 P2P设备的消息。现有技术是在一条信道上发送探测请求消息、在该信道监 听一段时间, 再转到下一条信道上发送探测请求消息、 在该信道监听一段 时间, 如此轮流地在三条信道上发送探测请求消息和监听。
而步骤 101 中, 第一设备在发送探测请求消息时, 携带了本机接收探 测响应消息的监听规律信息, 以使第二设备可以根据该监听规律信息进行 响应。 这样, 第一设备的监听规律可以不受限制, 而可以根据 P2P设备的 应用程序所要满足的场景的特定需求来设置, 例如有些应用程序需要发现 多个目标设备, 且需要长期运行, 并且在此期间该设备还需要提供用户打 电话、 发短信等通信功能, 这时, 可以将监听规律设计为省电的方案, 例 如, 监听时间可以设计为比较短, 而相邻两段监听时间的间隔可以比较长, 进一步的, 该间隔的时间内还可以将该第一设备置为休眠状态, 以节省该 设备的电量。
另外, 监听时间表示第一设备处于工作状态、 可接收其他设备发送的 消息的时间。 在监听时间之外, 可以是休眠状态, 也可以是不休眠但也不 接收消息的状态, 本发明对此不作限定。
在具体实现时, 探测请求消息中除了还可以携带本机的监听规律信息, 还可以携带本机的发送规律信息, 以使接收到该探测请求消息的第二设备 可以根据该发送规律信息来接收后续的消息。
步骤 102、 根据所述监听规律信息, 监听其他设备发送的消息。
具体地, 可以在设定的监听时间内、 在设定的信道上监听其他设备的 消息, 例如其他设备发送的探测响应消息, 或其他设备发送的探测请求消 息。 而其他时间, 该第一设备可以进入休眠状态以便降低功耗。
本实施例, 通过在发送探测请求消息时携带本机接收探测响应消息的 监听规律信息, 使目标设备在接收到该探测请求消息后, 能够根据该监听 规律信息, 在有效的时间及有效的信道上发送探测响应消息, 提高设备发 现的准确性和发现的效率。
在具体实现时, 由于目前可供 Social WiFi使用的信道有三条, 因此第 一设备可以在设定的一条信道发送探测请求消息, 或在设定的两条或三条 信道依次发送所述探测请求消息。
相应地, 在步骤 102 中, 第一设备可以根据监听规律信息, 在一条信 道监听其他设备发送的探测响应消息, 或在设定的两条或三条信道依次监 听其他设备发送的消息。
根据资源均衡的原则, 优选地, 第一设备可以在设定的一条信道发送 探测请求消息, 分别在三条信道依次保持一段连续的监听时间, 来监听其 他设备发送的消息; 或者, 依次在三条信道上发送探测请求消息, 在设定 的一条信道监听其他设备发送的消息。
进一步地, 所述监听规律信息中的监听时间信息可以包括: 从当前时 刻到下一次监听开始时刻之间的间隔、 监听时长和 \或相邻两次监听之间的 时间间隔。 具体地, 当前时刻可以为该探测请求消息发送的时刻, 监听时 长可以为下一次监听持续的时间长度。 优选的一种方案为监听规律信息中 同时包括: 从当前时刻到下一次监听开始时刻之间的间隔和监听时长, 而 由于无线传输的时间很短, 可以忽略, 因此, 接收到该探测请求消息的第 二设备可以根据接收到该探测请求消息的时刻和该间隔, 获得该第一设备 下一次监听的开始时刻。 再结合下一次监听持续的时间, 接收到该探测请 求消息的第二设备可以准确地在第一设备的最近一次持续监听的时间段内 发送探测响应消息。
进一步地, 上述实施例的步骤 102 中, 监听其他设备发送的消息可以 包括: 监听其他设备发送的探测响应消息和 \或探测请求消息。
进一步地, 上述实施例的步骤 101 中, 在设定信道上发送探测请求消 息包括: 在设定的发送信道上周期性和 /或非周期性地发送探测请求消息。
进一步优选地, 第一设备监听其他设备发送的消息的过程, 可以设置 一定的周期, 使监听周期性的执行; 发送探测请求消息的过程可以以在一 定的时间段内发送预设的次数的方式执行, 相邻两次发送探测请求消息的 间隔时间可以设置为在一定范围内随机选择, 以避免各个设备以相同的周 期同步地发送探测请求消息。 在此基础上, 可以设置相邻两次发送探测请 求消息的间隔为第一时长, 该第一时长为在一定范围内随机变化的, 监听 时长为第二时长。 而且, 可以控制第一时长小于第二时长, 以保证在监听 时长所限定的一次连续监听的过程中至少会发送两次探测请求消息, 即, 有两次接收其他设备的探测响应消息的机会, 从而提高发现的准确性。
图 2为本发明设备发现方法实施例二的流程图, 本实施例的执行主体 为第一设备。 如图 2所示, 本实施例的方法可以包括:
步骤 201、 在设定的发送信道上发送探测请求消息, 其中, 所述探测请 求消息中携带本机的监听规律信息, 所述监听规律信息至少包括监听时间 信息和 /或监听信道信息。
步骤 202、 根据所述监听规律信息, 监听其他设备发送的消息。
步骤 203、 按照所述监听规律信息, 进入休眠时间。
具体地, 第一设备可以根据各应用程序的需求, 设定一个时间范围, 在该时间范围内, 将除了监听时间之外的时间设为休眠时间, 在休眠时间 内, 第一设备仍然按既定的规律在设定的时间段内将本机唤醒并发送探测 请求消息, 其他的时间均处于休眠状态, 耗电量极小。 需要说明的是, 这 只是其中一种优选方案, 具体如何设置休眠, 本发明实施例不做任何限定。 例如, 也可以设置为, 在监听时间的间隔中设置休眠时间, 还可以设置部 分时间段, 不进行休眠也不接收其他设备的消息。
步骤 204、 按照所述监听规律信息, 在所述休眠时间内, 在设定的至少 一个监听窗口时间内将本机唤醒, 监听其他设备发送的消息。
具体地, 如果休眠时间在整个时间范围内占的比例较大, 即第一设备 大部分时间都处于休眠状态, 无法接收其他设备发送的消息, 这样有利于 第一设备的省电, 但是也会导致发现的效率过低, 可以在休眠时间内设置 一些监听窗口, 以解决这个矛盾。 相应地, 监听窗口的信息也可以在步骤 201中携带在探测请求消息中, 告知其他设备。
优选地, 监听窗口可以设置为, 在每次发送探测请求消息之后立即进 入监听窗口, 以便于当有其他设备在接收到该第一设备发送的探测请求消 息后立即发送探测响应消息。 对于这种优选方案, 由于监听窗口的周期与 发送探测请求消息的周期一致, 并且与探测请求消息的发送时间没有间隔 , 即, 这类监听窗口的规律简单, 且易于约定, 因此, 这种优选方案的监听 窗口信息可以不携带在探测请求消息中。
需要说明的是, 将监听窗口时间设置在休眠时间内, 只是一种优选方 案, 在实际实现时, 监听窗口时间也可以设置在激活状态的时间内, 例如 当设置了一部分既不休眠也不接收其他设备发送的消息的时间段时, 可以 在这些时间段内设置监听窗口时间。
步骤 205、当在所述监听窗口时间接收到其他设备发送的探测响应消息 时, 优先进行与发送该探测响应消息的设备的交互。
由于监听窗口的时长一般设置得较短, 如果在监听窗口监听到其他设 备发送的消息, 例如监听到其他设备发送的探测响应消息, 或者监听到其 他设备发送的探测请求消息且满足对方设备的需求时, 而监听窗口时间又 不够本机与对方设备进行交互, 这时, 可以延长监听窗口的时间, 以便和 对方设备进行进一步的信息交互, 例如协商配置、 认证和连接等。 该信息 交互的过程中需要等待后续消息, 具体实现时, 可以设置一预设时间, 若 在预设时间内未收到后续消息, 则可以重新进入休眠。
在实际实现时, 步骤 205 的操作并不仅限于在监听窗口接收其他设备 的消息时将本机从休眠状态中唤醒, 而可以是在任何阶段接收到其他设备 的消息时, 均可以优先进行与所述其他设备的交互。 例如, 接收到其他设 备的消息时正好处于监听时间快要结束, 即, 快要进入休眠状态时, 或者 监听时间不足以完成与对方设备的信息交互时, 均可以延长监听时间的长 度, 直到完成与对方设备的信息交互。 完成后, 如果还需要继续发现更多 的第二设备, 则可以重新执行上述的步骤 201至步骤 205的过程, 否则, 可以退出发现程序。
为了验证本实施例的方案效果, 本发明实施例将本实施例的方案与现 有技术的方案进行仿真, 对比发现其他设备所需时间的长短。 仿真中一共 有两个 P2P设备, 仿真过程中无其他设备干扰, 不釆用退避, 重发等机制。 该两个 P2P设备仿真的参数如下:发送探测请求消息的时长为 0.4毫秒,发 送功率 50毫瓦, 监听功率为 25毫瓦。
仿真过程中, 将现有技术的方案命名为方案一。 方案一的监听时间为 在 100ms, 200ms, 300ms的随机取值, 其平均监听周期为 200ms。 针对本 实施例分别釆用两个方案, 一个是方案二: 在设定的一条信道发送探测请 求消息, 分别在三条信道依次保持一段连续的监听时间, 来监听其他设备 发送的探测响应消息,为了与方案一公平比较,将监听周期也设置为 200ms; 另一个是方案三: 依次在三条信道上发送探测请求消息, 在设定的一条信 道监听其他设备发送的探测响应消息, 为了与方案一公平比较, 将监听周 期也设置为 200ms。
将三种方案中的开始时间设为发现流程中的任意时刻, 结束时间为两 个 P2P 设备中的任意一个接收到探测响应消息的时间。 仿真运行次数是 100000次, 取时间步长为 200ms。 仿真结果显示, 方案二在发现时间上略 优于方案一, 而方案三的发现时间要远远小于方案一。 具体地, 在所有的 100000次运行中, 方案三在 200ms内完成发现的几率为 99%以上, 而方案 一在 200毫秒完成发现的几率低于 72%; 方案三的平均发现时间为 45ms, 而方案一的平均发现时间为 160ms。 因此, 艮明显地, 本实施例的方案(依 次在三条信道上发送探测请求消息, 在设定的一条信道监听其他设备发送 的探测响应消息) 的发现效率远远高于现有技术的发现方案。
本实施例, 通过在设备发现的过程中, 加入休眠时间, 降低设备发现 程序的耗电量; 通过在休眠时间中加入监听窗口, 以及监听窗口的合理设 置, 提高发现的效率, 缩短设备完成发现所需要的时间; 通过当在监听窗 口时间监听到其他设备发送的探测响应消息时, 可以将本机从休眠状态中 唤醒的机制, 便于及时地与目标设备进行信息交互, 使整个发现过程在最 短时间内完成。
图 3 为本发明设备发现方法实施例三的流程图, 本实施例的执行主体 为第二设备。 该方法可以由任意 P2P设备执行, 如图 3所示, 本实施例的 方法包括:
步骤 301、接收其他设备发送的探测请求消息, 所述探测请求消息中携 带监听规律信息,所述监听规律信息包括监听时间信息和 /或监听信道信息。
具体地, 由于本实施例的执行主体为第二设备, 即待发现的目标设备; 步骤 301 中的其他设备可以对应于第一设备, 即主动探测的设备, 探测请 求消息中携带的监听规律信息也为第一设备的监听规律信息。 该监听规律 信息可以与本设备的监听规律信息相同, 也可以不同。
步骤 302、根据所述探测请求消息中携带的监听规律信息, 在所述监听 时间和 /或监听信道发送探测响应消息。
具体地, 第二设备按照第一设备的监听规律发送探测响应消息, 例如, 根据所接收到探测请求消息中携带的监听规律信息确定发送探测响应消息 的时机和发送信道。 这样, 可以保证第一设备成功接收该探测响应消息。
两个设备在后续可以进行进一步的信息交互, 直至发现对方。
本实施例, 通过接收其他设备发送的携带监听规律信息的探测请求消 息, 并按照该监听规律信息向该设备发送探测响应消息, 保证所发送的探 测响应消息被成功地接收, 从而提高设备发现的效率。
图 4为本发明设备发现方法实施例四的信令流程图, 本实施例中两个 设备所使用的发现方法一致, 为了描述的简洁性, 本实施例以第一设备为 主进行描述。 图中分别用斜线阴影、 斑点阴影、 交叉线阴影代表三条不同 的信道, 用灰色填充代表休眠状态, 图中两个设备用于监听的信道可以相 同也可以不同; 另外, 为了使图片更为清晰, 图中使用短箭头表示周期性 地发送探测请求消息。 如图 4所示, 本实施例的方法可以包括:
步骤 401、 第一设备依次在三条信道上发送探测请求消息, 其中, 所述 探测请求消息中携带本机的监听规律信息, 所述监听规律信息包括监听时 间信息和监听信道信息。
步骤 402、 第一设备根据所述监听规律信息, 在设定的一条信道上监听 其他设备发送的消息, 并按照所述监听规律信息, 进入休眠时间, 以及监 听窗口时间。
步骤 403、 第一设备在所述休眠时间内, 在设定监听窗口时间内, 通过 监听信道接收其他设备发送的探测响应消息。
步骤 404、当在所述监听窗口时间接收到第二设备发送的探测响应消息 时, 延长监听窗口的时间, 与第二设备进行交互。
本实施例 , 通过在设备发现过程中加入休眠时间实现省电; 通过可延 长时间的监听窗口使发现程序更有效。
为了验证本实施例的方案在省电方面的效果, 将本实施例的方案进行 仿真, 并仿真多个休眠时间长短不同、 监听时间长短不同的方案组合, 观 察在不同的平均发现时间下对应的平均功耗情况。 仿真结果显示, 当选择 连续监听时间为 400ms , 休眠时间为 2s , 不设置监听窗口时, 其平均发现 时间为 600ms , 其平均功耗为 50mw, 此时相比于现有技术的发现方案节省 了 80%的耗电量。
图 5 为本发明设备发现方法实施例五的信令流程图, 本实施例中两个 设备所使用的发现方法一致, 为了描述的简洁性, 本实施例以第一设备为 主进行描述。 图中分别用斜线阴影、 斑点阴影、 交叉线阴影代表三条不同 的信道, 用灰色填充代表休眠状态; 图中两个设备用于发送探测请求消息 的信道可以相同也可以不同。 另外, 为了使图片更为清晰, 图中使用短箭 头表示周期性地发送探测请求消息。 如图 5 所示, 本实施例的方法可以包 括:
步骤 501、 第一设备在设定的一条信道上发送探测请求消息, 其中, 所 述探测请求消息中携带本机的监听规律信息, 所述监听规律信息包括监听 时间信息和监听信道信息。
步骤 502、 第一设备根据所述监听规律信息, 在三条信道上依次监听其 他设备发送的消息, 并按照所述监听规律信息, 进入休眠时间, 以及监听 窗口时间。
步骤 503、 第一设备在监听时间内,接收第二设备根据所述监听规律信 息在相应的监听信道发送的探测响应消息。
步骤 504、 如果第一设备在接收所述第二设备发送的探测响应消息时, 在所述信道的监听时间即将结束, 则延长在所述信道的监听时间, 与第二 设备进行交互。 步骤 504 的场景可以为, 第一设备在接收所述第二设备发送的探测响 应消息时, 按照设定的监听规律即将进入休眠状态, 或者即将改变信道进 行监听, 这时由于接收到其他设备发送的探测响应消息, 则可以延长在所 述信道的监听时间, 以便与第二设备完成交互。
当在所述监听窗口时间监听到第二设备发送的探测响应消息时, 将本 机从休眠状态中唤醒, 与第二设备进行交互。
本实施例 , 通过在设备发现过程中加入休眠时间实现省电; 通过在接 收探测响应消息时可以延长在该信道的监听时间, 从而使发现程序更有效。
图 6为本发明第一设备发现装置实施例一的结构示意图, 如图 6所示, 本实施例的装置 600可以包括: 探测模块 11和监听模块 12 , 其中, 探测模 块 11用于在设定的发送信道上发送探测请求消息, 其中, 所述探测请求消 息中携带本机的监听规律信息, 所述监听规律信息至少包括监听时间信息 和 /或监听信道信息; 监听模块 12用于根据所述监听规律信息,监听其他设 备发送的探测响应消息。
本实施例的装置, 可以用于执行图 1 所示方法实施例的技术方案, 具 备相应的功能模块, 其实现原理类似, 此处不再赘述。 本实施例的装置, 通过在发送探测请求消息时携带本机接收探测响应消息的监听规律信息, 使目标设备在接收到该探测请求消息后, 能够根据该监听规律信息, 在有 效的时间及有效的信道上发送探测响应消息, 提高设备发现的准确性和发 现的效率。
本实施例的装置, 在具体实现时, 优选地, 探测模块 11具体用于: 在 设定的一条信道发送所述探测请求消息, 或在设定的至少两条信道依次发 送所述探测请求消息。
本实施例的装置, 在具体实现时, 优选地, 监听模块 12具体用于: 根 据所述监听规律信息, 在一条信道监听其他设备发送的消息, 或在设定的 至少两条信道依次监听其他设备发送的消息。
本实施例的装置, 在具体实现时, 优选地, 所述监听规律信息中的监 听时间信息包括: 从当前时刻到下一次监听开始时刻之间的间隔、 监听时 长和 \或相邻两次监听之间的时间间隔。
本实施例的装置, 在具体实现时, 优选地, 监听模块 12具体用于: 根 据所述监听规律信息, 监听其他设备发送的探测响应消息和 \或探测请求消 息。
本实施例的装置, 在具体实现时, 优选地, 为了提高发现的准确性, 相邻两次发送所述探测请求消息的间隔为第一时长, 所述监听规律信息中 的监听时长为第二时长, 且所述第一时长小于所述第二时长。
图 7为本发明第一设备发现装置实施例二的结构示意图, 如图 7所示, 本实施例的装置 700在图 6所示装置结构的基础上, 进一步地, 还可以包 括: 休眠模块 13和监听窗口模块 14, 其中, 休眠模块 13用于按照所述监 听规律信息, 进入休眠时间; 监听窗口模块 14, 用于按照所述监听规律信 息, 在所述休眠时间内, 在设定的至少一个监听窗口时间内将本机唤醒, 监听其他设备发送的消息。
本实施例的装置, 可以用于执行图 2 所示方法实施例的技术方案, 具 备相应的功能模块, 其实现原理和技术效果类似, 此处不再赘述。
图 8为本发明第二设备发现装置实施例一的结构示意图。 如图 8所示, 本实施例的装置 800包括: 接收模块 21和响应模块 22 , 其中, 接收模块 21 , 用于接收其他设备发送的探测请求消息, 所述探测请求消息中携带监 听规律信息, 所述监听规律信息包括监听时间信息和 /或监听信道信息; 响 应模块 22 , 用于根据所述探测请求消息中携带的监听规律信息, 在所述监 听时间和 /或监听信道发送探测响应消息。
本实施例的装置, 可以用于执行图 3 所示方法实施例的技术方案, 具 备相应的功能模块, 其实现原理类似, 此处不再赘述。 本实施例的装置, 通过接收其他设备发送的携带监听规律信息的探测请求消息, 并按照该监 听规律信息向该设备发送探测响应消息, 保证所发送的探测响应消息被成 功地接收, 从而提高设备发现的效率。
图 9为本发明第一设备发现装置实施例三的结构示意图。 如图 9所示, 本实施例的第一设备发现装置 900包括: 至少一个 CPU 901、 至少一个网 絡接口 902、 存储器 903 , 和至少一通信总线 904。 通信总线 904用于实现 各部件之间的连接通信。存储器 903可能包含高速 RAM存储器,也可能还 包括非易失性存储器(英文为 non-volatile memory, 以下简称 NVM ), 例如 至少一个磁盘存储器。 存储器 903 可选的可以包含至少一个存储装置, 存 储各种代码等, 用于实现各种基础业务以及处理基于硬件的任务。
其中, CUP901根据存储器 903存储的代码的指示执行如下动作: 在设 定的发送信道上发送探测请求消息, 其中, 所述探测请求消息中携带本机 的监听规律信息, 所述监听规律信息至少包括监听时间信息和 /或监听信道 信息; 根据所述监听规律信息, 监听其他设备发送的探测响应消息。
进一步地, CPU901还用于:在设定的一条信道发送所述探测请求消息, 或在设定的至少两条信道依次发送所述探测请求消息; 根据所述监听规律 信息, 在一条信道监听其他设备发送的消息, 或在设定的至少两条信道依 次监听其他设备发送的消息; 所述监听规律信息中的监听时间信息包括: 从当前时刻到下一次监听开始时刻之间的间隔、 监听时长和 \或相邻两次监 听之间的时间间隔; 根据所述监听规律信息, 监听其他设备发送的探测响 应消息和\或探测请求消息; 相邻两次发送所述探测请求消息的间隔为第一 时长, 所述监听规律信息中的监听时长为第二时长, 且所述第一时长小于 所述第二时长; 按照所述监听规律信息, 进入休眠时间; 按照所述监听规 律信息, 在所述休眠时间内, 在设定的至少一个监听窗口时间内将本机唤 醒, 监听其他设备发送的消息。
本实施例的装置, 可以用于执行图 1或图 2所示方法实施例的技术方 案以及图 3或图 4所示实施例中第一设备对应执行的技术方案, 其实现原 理和技术效果类似, 此处不再赘述。
图 10为本发明第二设备发现装置实施例二的结构示意图。 如图 10所 示, 本实施例的第二设备发现装置 1000包括: 至少一个 CPU 1001、 至少 一个网絡接口 1002、存储器 1003 ,和至少一通信总线 1004。通信总线 1004 用于实现各部件之间的连接通信。存储器 1003可能包含高速 RAM存储器, 也可能还包括非易失性存储器 (英文为 non-volatile memory, 以下简称 NVM ), 例如至少一个磁盘存储器。 存储器 1003可选的可以包含至少一个 存储装置, 存储各种代码等, 用于实现各种基础业务以及处理基于硬件的 任务。
其中, CUP 1001根据存储器 1003存储的代码的指示执行如下动作: 接收其他设备发送的探测请求消息, 所述探测请求消息中携带监听规律信 息, 所述监听规律信息包括监听时间信息和 /或监听信道信息; 根据所述探 测请求消息中携带的监听规律信息, 在所述监听时间和 /或监听信道发送探 测响应消息。
本实施例的装置, 可以用于执行图 3 所示方法实施例的技术方案以及 图 3或图 4所示实施例中第二设备对应执行的技术方案, 其实现原理和技 术效果类似, 此处不再赘述。
本领域普通技术人员可以理解: 实现上述各方法实施例的全部或部分 步骤可以通过程序指令相关的硬件来完成。 前述的程序可以存储于一计算 机可读取存储介质中。 该程序在执行时, 执行包括上述各方法实施例的步 骤; 而前述的存储介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储 程序代码的介质。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非 对其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的 普通技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进 行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或 者替换, 并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权利要求
1、 一种设备发现方法, 其特征在于, 包括:
在设定的发送信道上发送探测请求消息, 其中, 所述探测请求消息中 携带本机的监听规律信息, 所述监听规律信息至少包括监听时间信息和 /或 监听信道信息;
根据所述监听规律信息, 监听其他设备发送的消息。
2、 根据权利要求 1所述的设备发现方法, 其特征在于, 所述在设定的 发送信道上发送探测请求消息包括:
在设定的一条信道发送所述探测请求消息, 或在设定的至少两条信道 依次发送所述探测请求消息。
3、 根据权利要求 2所述的设备发现方法, 其特征在于, 所述根据所述 监听规律信息, 监听其他设备发送的消息包括:
根据所述监听规律信息, 在一条信道监听其他设备发送的消息, 或在 设定的至少两条信道依次监听其他设备发送的消息。
4、 根据权利要求 1〜3任一所述的设备发现方法, 其特征在于, 所述监 听规律信息中的监听时间信息包括:
从当前时刻到下一次监听开始时刻之间的间隔、 监听时长和 \或相邻两 次监听之间的时间间隔。
5、 根据权利要求 1〜4任一所述的设备发现方法, 其特征在于, 所述根 据所述监听规律信息, 监听其他设备发送的消息包括:
根据所述监听规律信息, 监听其他设备发送的探测响应消息和\或探测 请求消息。
6、 根据权利要求 4所述的设备发现方法, 其特征在于: 相邻两次发送 所述探测请求消息的间隔为第一时长, 所述监听规律信息中的监听时长为 第二时长, 且所述第一时长小于所述第二时长。
7、根据权利要求 1〜6任一所述的设备发现方法,其特征在于,还包括: 按照所述监听规律信息, 进入休眠时间。
8、 根据权利要求 7所述的设备发现方法, 其特征在于, 还包括: 按照所述监听规律信息, 在所述休眠时间内, 在设定的至少一个监听 窗口时间内将本机唤醒, 监听其他设备发送的消息。
9、 一种设备发现方法, 其特征在于, 包括:
接收其他设备发送的探测请求消息, 所述探测请求消息中携带监听规 律信息, 所述监听规律信息包括监听时间信息和 /或监听信道信息;
根据所述探测请求消息中携带的监听规律信息, 在所述监听时间和 /或 监听信道发送探测响应消息。
10、 一种第一设备发现装置, 其特征在于, 包括:
探测模块, 用于在设定的发送信道上发送探测请求消息, 其中, 所述 探测请求消息中携带本机的监听规律信息, 所述监听规律信息至少包括监 听时间信息和 /或监听信道信息;
监听模块, 用于根据所述监听规律信息, 监听其他设备发送的消息。
11、 根据权利要求 10所述的装置, 其特征在于, 所述探测模块具体用 于:
在设定的一条信道发送所述探测请求消息, 或在设定的至少两条信道 依次发送所述探测请求消息。
12、 根据权利要求 11所述的装置, 其特征在于, 所述监听模块具体用 于:
根据所述监听规律信息, 在一条信道监听其他设备发送的消息, 或在 设定的至少两条信道依次监听其他设备发送的消息。
13、 根据权利要求 10〜12任一所述的装置, 其特征在于, 所述监听规 律信息中的监听时间信息包括:
从当前时刻到下一次监听开始时刻之间的间隔、 监听时长和、 或相邻 两次监听之间的时间间隔。
14、 根据权利要求 10〜13任一所述的装置, 其特征在于, 所述监听模 块具体用于:
根据所述监听规律信息, 监听其他设备发送的探测响应消息和\或探测 请求消息。
15、 根据权利要求 13所述的装置, 其特征在于, 相邻两次发送所述探 测请求消息的间隔为第一时长, 所述监听规律信息中的监听时长为第二时 长, 且所述第一时长小于所述第二时长。
16、 根据权利要求 10〜15任一所述的装置, 其特征在于, 还包括: 休眠模块, 用于按照所述监听规律信息, 进入休眠时间。
17、 根据权利要求 16所述的装置, 其特征在于, 还包括:
监听窗口模块, 用于按照所述监听规律信息, 在所述休眠时间内, 在 设定的至少一个监听窗口时间内将本机唤醒, 监听其他设备发送的消息。
18、 一种第二设备发现装置, 其特征在于, 包括:
接收模块, 用于接收其他设备发送的探测请求消息, 所述探测请求消 息中携带监听规律信息, 所述监听规律信息包括监听时间信息和 /或监听信 道信息;
响应模块, 用于根据所述探测请求消息中携带的监听规律信息, 在所 述监听时间和 /或监听信道发送探测响应消息。
19、 一种设备发现系统, 其特征在于, 包括:
至少一个如权利要求 10〜17任一项所述的第一设备发现装置以及至少 一个如权利要求 18所述的第二设备发现装置。
PCT/CN2013/091174 2012-12-31 2013-12-31 设备发现方法、装置及系统 WO2014101893A1 (zh)

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