WO2018098943A1 - 无线局域网接入点切换的方法和终端 - Google Patents

无线局域网接入点切换的方法和终端 Download PDF

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Publication number
WO2018098943A1
WO2018098943A1 PCT/CN2017/078006 CN2017078006W WO2018098943A1 WO 2018098943 A1 WO2018098943 A1 WO 2018098943A1 CN 2017078006 W CN2017078006 W CN 2017078006W WO 2018098943 A1 WO2018098943 A1 WO 2018098943A1
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WIPO (PCT)
Prior art keywords
access point
workstation
terminal
signal quality
chip
Prior art date
Application number
PCT/CN2017/078006
Other languages
English (en)
French (fr)
Inventor
蔡双林
屈立虎
徐军
胡同明
贺安超
屈敬伟
吴勇桃
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780005505.9A priority Critical patent/CN108476451A/zh
Priority to US16/465,676 priority patent/US20190306774A1/en
Publication of WO2018098943A1 publication Critical patent/WO2018098943A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a terminal for switching a wireless local area network access point.
  • Wi-Fi Wireless-Fidelity
  • Wi-Fi Wireless-Fidelity
  • Wi-Fi APs Wi-Fi wireless access points
  • the above terminals include Wi-Fi enabled devices such as mobile phones, routers, and mobile Wi-Fi.
  • the terminal moves between the coverages of different Wi-Fi APs, it is necessary to disconnect the current Wi-Fi AP and then connect to another Wi-Fi AP.
  • the interruption of the terminal data service is as short as a few seconds and as many as several tens of seconds.
  • the interruption of data services will reduce the user experience, especially in the case where the terminal relies on Wi-Fi to use the network, such as the terminal is in a home distributed Wi-Fi network environment or a poor signal location such as a subway station or an underground parking lot.
  • the embodiment of the invention provides a method and a terminal for switching a wireless local area network access point, so as to solve the problem of data service interruption in the process of switching the wireless local area network access point.
  • the present invention provides a method for wireless local area network access point switching.
  • the terminal establishes a first communication connection with the first access point by using the first workstation; the terminal determines that the signal quality of the first access point meets the handover condition, the terminal detects the second access point, and the terminal establishes and the second workstation a second communication connection between the two access points; the terminal determines that the signal quality of the second access point is better than the signal quality of the first access point, and the terminal disconnects the first communication connection.
  • the terminal establishes a connection with another access point through the second workstation while maintaining the connection between the first workstation and the current access point, and confirms that the signal quality of the other access point is better than the current access point. After the signal quality, disconnect the first workstation from the current access point and keep the connection between the second workstation and another access point, thereby achieving seamless switching between the terminal and the access point, and improving the user Experience.
  • the method before the terminal establishes a second communication connection with the second access point by using the second workstation, the method further includes: the terminal generating the second workstation.
  • the terminal can establish a connection with another connection point by generating the second workstation while maintaining the connection between the first workstation and the current access point.
  • the first workstation works on the first physical layer
  • the second workstation works in Above the second physical layer.
  • the terminal includes a first wireless fidelity Wi-Fi chip, and the first Wi-Fi chip is configured to generate the first workstation and the second workstation.
  • the terminal includes a first wireless fidelity Wi-Fi chip and a second Wi-Fi chip; the first Wi-Fi chip is used to generate a first workstation, and the second Wi-Fi chip is used to generate Second workstation.
  • the terminal determines that the signal quality of the first access point meets the handover condition, that is, the terminal performs link detection on the first communication connection, and determines a signal of the first access point according to the result of the link detection.
  • the quality meets the switching conditions.
  • the terminal determines that the signal quality of the second access point is better than the signal quality of the first access point, and the method includes: the terminal performs link detection on the second communication connection, and determines, according to the result of the link detection.
  • the signal quality of the second access point is better than the signal quality of the first access point.
  • the parameters of the link detection include a received signal strength, a packet error rate, and a data transmission delay.
  • the embodiment of the present invention provides a terminal, where the terminal can implement the function performed by the terminal in the method for switching the wireless local area network access point in the foregoing first aspect, and the function can be implemented by hardware or by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the terminal includes a communication module and a processing module; the processing module is configured to control the communication module to establish a first communication connection with the first access point through the first workstation; and determine a signal of the first access point The quality meets the switching condition, detects the second access point, and the control communication module establishes a second communication connection with the second access point through the second workstation; determining that the signal quality of the second access point is better than the first access point The signal quality is controlled by the communication module to disconnect the first communication connection.
  • the processing module is further configured to generate the second workstation before the control communication module establishes a second communication connection with the second access point through the second workstation.
  • the first workstation operates above the first physical layer and the second workstation operates above the second physical layer.
  • the terminal includes a first wireless fidelity Wi-Fi chip, and the first Wi-Fi chip is used to generate the first workstation and the second workstation.
  • the terminal includes a first wireless fidelity Wi-Fi chip and a second Wi-Fi chip; a first Wi-Fi chip is used to generate a first workstation, and a second Wi-Fi chip is used to generate a second workstation.
  • the processing module determines that the signal quality of the first access point meets the switching condition, and includes: the processing module performs link detection on the first communication connection, and determines a signal of the first access point according to the result of the link detection. The quality meets the switching conditions.
  • the processing module determines that the signal quality of the second access point is better than the signal quality of the first access point, and the processing module performs link detection on the second communication connection, and determines according to the result of the link detection.
  • the signal quality of the second access point is better than the signal quality of the first access point.
  • the parameters of the link detection include received signal strength, packet error rate, and data transmission delay.
  • an embodiment of the present invention provides a terminal, where the terminal can implement the wireless local area of the foregoing first aspect.
  • the terminal includes a processor, a memory, and a wireless local area network WLAN module.
  • the memory is configured to store program instructions; the processor is configured to: according to the program instructions stored in the memory, to: instruct the WLAN module to establish a first communication connection with the first access point through the first workstation; and determine the first access
  • the signal quality of the point conforms to the handover condition, instructing the WLAN module to detect the second access point, instructing the WLAN module to establish a second communication connection with the second access point through the second workstation; and determining the signal quality of the second access point Better than the signal quality of the first access point, indicating that the WLAN module disconnects the first communication connection.
  • the processor is further configured to: according to the program instructions stored in the memory, to: instruct the WLAN module before instructing the WLAN module to establish a second communication connection with the second access point through the second workstation Generate a second workstation.
  • the first workstation operates above the first physical layer and the second workstation operates above the second physical layer.
  • the WLAN module includes a first wireless fidelity Wi-Fi chip, and the first Wi-Fi chip is used to generate a first workstation and a second workstation.
  • the WLAN module includes a first Wi-Fi chip and a second Wi-Fi chip; a first Wi-Fi chip is used to generate a first workstation, and a second Wi-Fi chip is used to generate a second workstation.
  • the processor is specifically configured to: according to the program instructions stored in the memory, perform the following operations: instruct the WLAN module to perform link detection on the first communication connection, and determine a signal of the first access point according to the result of the link detection. The quality meets the switching conditions.
  • the processor is specifically configured to: according to the program instructions stored in the memory, perform the following operations: instruct the WLAN module to perform link detection on the second communication connection, and determine a signal of the second access point according to the result of the link detection.
  • the quality is better than the signal quality of the first access point.
  • the parameters of the link detection include received signal strength, packet error rate, and data transmission delay.
  • the terminal establishes a connection with another access point through the second workstation while maintaining the connection between the first workstation and the current access point, and confirms After the signal quality of the other access point is better than the signal quality of the current access point, disconnecting the first workstation from the current access point and leaving the connection between the second workstation and another access point, thereby realizing the terminal and Seamless switching between access points and improved user experience.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic communication diagram of a method for switching a wireless local area network access point according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another method for switching a wireless local area network access point according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an application scenario of a terminal performing an access point handover according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another terminal according to an embodiment of the present invention.
  • the network architecture and the service scenario described in the embodiments of the present invention are used to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation of the technical solutions provided by the embodiments of the present invention.
  • the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • the communication system includes at least one terminal 10, at least two wireless local area network access points 20 and 21. Only one terminal and two access points are shown in the figure. In practice, there may be more terminals and more access points, which is not limited in this embodiment of the present invention.
  • the WLAN access point may be a Wi-Fi AP, or an AP supporting other radio access technologies, as long as the access point that the terminal can access the network through the radio access technology belongs to the embodiment of the present invention. The scope of this will not be repeated here.
  • the terminal may be a mobile phone including a Wi-Fi function, a computer, or the like, or a device supporting other wireless access technologies, as long as the device capable of connecting to the wireless local area network access point belongs to the scope of protection of the embodiment of the present invention. , will not repeat them here.
  • a method for switching a wireless local area network access point the terminal establishes a connection with another access point through the second workstation while maintaining the connection between the first workstation and the current access point, and confirms another connection. After the signal quality of the ingress point is better than the signal quality of the current access point, the connection between the first workstation and the current access point is disconnected and the connection between the second workstation and another access point is reserved, thereby realizing the terminal and the access point. Seamless switching between and improves the user experience.
  • FIG. 2 is a schematic communication diagram of a method for switching a wireless local area network access point according to an embodiment of the present invention. As shown in FIG. 2, this embodiment may include:
  • Step 201 The terminal establishes a first communication connection with the first access point by using the first workstation.
  • the first access point is a wireless local area network access point, such as a Wi-Fi AP.
  • the first communication connection is a wireless link connection.
  • the establishment process of the wireless link connection includes: performing link authentication between the workstation and the access point, and negotiating the service parameters of the wireless link.
  • Step 202 The terminal determines that the signal quality of the first access point meets the handover condition, the terminal detects the second access point, and the terminal establishes a second communication connection with the second access point by using the second workstation.
  • the terminal determines that the signal quality of the first access point meets the handover condition, and includes: performing, by the terminal, performing link detection on the first communication connection, and determining, according to the result of the link detection, that the signal quality of the first access point meets the handover condition.
  • the terminal periodically performs link detection on the first communication connection. For example, a detection cycle is set, and a link detection is performed every time one detection cycle elapses.
  • the parameters of the link detection may include received signal strength, packet error rate, and data transmission delay.
  • the switching condition can be a comprehensive judgment criterion.
  • the received signal strength is lower than -78 dBm
  • the packet error rate is greater than 5%
  • the data transmission delay is greater than 1 second.
  • the result of the link detection that is, the parameter value is comprehensively scored and a preset threshold is set
  • the switching condition may be that the comprehensive score is greater than a preset threshold.
  • the synthesis algorithm may assign different weights to parameters such as received signal strength, packet error rate, and data transmission delay, and score according to the parameter values. For example, the parameter value corresponding to the received signal strength is -60 dBm, which is not satisfied because -60 dBm is greater than -78 dBm.
  • the received signal strength is lower than -78dBm, so the parameter value is divided into 0; the parameter value corresponding to the error packet rate is 6%, because 6% is greater than 5%, and the condition that the packet error rate is higher than 5% is satisfied, so this parameter
  • the value is divided into 4 points; the parameter value of the data transmission delay is 1.5 seconds, and the condition that the data transmission delay is greater than 1 second is satisfied because 1.5 seconds is greater than 1 second, so the parameter value is divided into 3 points.
  • Different weights are assigned to different parameters, as shown in Table 1. According to Table 1, the comprehensive score of the parameter values of the group can be calculated as 2.4 points, and the set value of the preset threshold is 2.1 points. Because the comprehensive score of 2.4 points is greater than the preset threshold of 2.1 points, it meets the switching conditions.
  • the Physical Layer is the lowest layer in the Open Systems Interconnection Reference Model (OSI/RM).
  • Physical layer specification provides physical, electronic, functional, and canonical features for the creation, maintenance, and removal of physical links required to transmit data.
  • the physical layer provides transmission media and interconnected devices for data communication between devices, providing a reliable environment for data transmission.
  • one terminal includes a Wi-Fi chip, and one Wi-Fi chip includes a physical layer.
  • one terminal includes two Wi-Fi chips or one Wi-Fi chip includes two physical layers, and the two Wi-Fi chips or physical layers can provide simultaneous concurrent scenes of the 2.4G band and the 5G band.
  • a user can simultaneously use the 2.4G band and the 5G band on one terminal.
  • the 2.4G frequency band and the 5G frequency band are two radio frequency bands that are common to the physical layer.
  • the Wi-Fi chip can also support other frequency bands, which is not limited in this embodiment of the present invention.
  • the first workstation operates above the first physical layer and the second workstation operates above the second physical layer.
  • the terminal includes a first Wi-Fi chip for generating a first workstation and a second workstation.
  • the terminal includes a first Wi-Fi chip and a second Wi-Fi chip; the first Wi-Fi chip is used to generate a first workstation, and the second Wi-Fi chip is used to generate a second workstation.
  • the first physical layer and the second physical layer can operate in the same frequency band or can operate in different frequency bands.
  • the first physical layer operates on the 2.4G frequency band and the second physical layer operates on the 5G frequency band.
  • the terminal determines that the signal quality of the first access point meets the handover condition, and the terminal performs scanning to detect other access points existing around, and selects a second access point from other scanned access points, and the terminal passes The second workstation establishes a second communication connection with the second access point.
  • the terminal may detect other access points existing around by using active scanning or passive scanning.
  • Scanning is the process by which a terminal's workstation searches for a wireless network.
  • the second workstation actively sends a sounding signal, that is, a probe request, on the channel supported by the second station to detect the surrounding wireless network.
  • the second workstation does not actively send the probe request message, but passively receives the beacon frame periodically sent by the surrounding access point.
  • the terminal selects the access point with the highest signal strength from the other access points scanned as the second access point.
  • the terminal selects an access point that has been connected as a second access point from among other access points scanned.
  • Step 203 The terminal determines that the signal quality of the second access point is better than the signal quality of the first access point, and the terminal disconnects the first communication connection.
  • the terminal determines that the signal quality of the second access point is better than the signal quality of the first access point, and includes: performing, by the terminal, link detection on the second communication connection and the first communication connection, and detecting according to the link As a result, it is determined that the signal quality of the second access point is better than the signal quality of the first access point.
  • a determination of the signal quality of the first access point and the quality of the second access point signal is provided.
  • a method for switching a wireless local area network access point while maintaining a connection between a first workstation and a current access point, establishing a connection with another access point through the second workstation, and confirming another access
  • the connection between the first workstation and the current access point is disconnected and the connection between the second workstation and another access point is reserved, thereby realizing the terminal and the access point. Seamless switching between and improves the user experience.
  • FIG. 3 is a schematic diagram of another method for switching a wireless local area network access point according to an embodiment of the present invention. As shown in FIG. 3, this embodiment may include:
  • Step 301 The terminal establishes a first communication connection with the first access point by using the first workstation.
  • step 302 the terminal generates a second workstation.
  • the terminal generates a second workstation that operates above the first physical layer.
  • the terminal includes a first Wi-Fi chip for generating a first workstation and a second workstation.
  • the terminal virtualizes and works out of the second workstation above the first physical layer through the Wi-Fi chip.
  • the first workstation also operates on the first physical layer, and the first workstation and the second workstation can operate in the first frequency band and the second frequency band, respectively, by means of time sharing.
  • the first frequency band and the second frequency band may be the same or different. For example, setting 25ms as one cycle, the first workstation operates in the first frequency band in the first cycle, and the second workstation operates in the second frequency band in the second cycle, thus alternately.
  • the first frequency band and the second frequency band may be the same, both being 2.4G frequency band or 5G frequency band; the first frequency band and the second frequency band may also be different, for example, the first frequency band is 2.4G frequency band, the second frequency band is 5G frequency band, or One frequency band is the 5G frequency band and the second frequency band is the 2.4G frequency band.
  • the terminal broadcasts a message to the first access point, where the message is used to notify the first access point: in the next second working period.
  • the first workstation is in a dormant state, that is, in the second working cycle, the terminal will not receive and transmit data through the first workstation.
  • the terminal broadcasts a message to the second access point, where the message is used to notify the second access point: in the next third working period,
  • the second workstation is in a dormant state, that is, in the third working cycle, the terminal will not receive and transmit data through the second workstation.
  • the second workstation is a proxy station.
  • the first workstation and the second workstation share the radio device of the first physical layer, and logically (such as the link layer and the network layer, etc.), the two complete workstations work alternately.
  • the terminal virtualizes a second workstation working on the first physical layer through software.
  • Step 303 The terminal determines that the signal quality of the first access point meets the handover condition, the terminal detects the second access point, and the terminal establishes a second communication connection with the second access point by using the second workstation.
  • Step 304 The terminal determines that the signal quality of the second access point is better than the signal quality of the first access point, and the terminal is disconnected. Open the first communication connection.
  • steps 301, 303, and 304 may refer to the detailed description of steps 201-203 in FIG. 2, and details are not described herein.
  • a method for switching a wireless local area network access point while maintaining a connection between a first workstation and a current access point, by establishing a second workstation and establishing a connection with another access point, confirming another After the signal quality of an access point is better than the signal quality of the current access point, the connection between the first workstation and the current access point is disconnected and the connection between the second workstation and another access point is reserved, thereby realizing terminal and connection. Seamless switching between in points and improved user experience.
  • FIG. 4 is a schematic diagram of an application scenario of a terminal performing an access point handover according to an embodiment of the present invention. As shown in FIG. 4, the step of the terminal performing the access point switching includes:
  • Step 401 The first workstation STA1 establishes a first communication connection with the first access point AP1 through Wi-Fi, and the terminal periodically detects the link state of the AP1, and the detection parameters include: received signal strength, packet error rate, data transmission delay, etc. factor. According to the result of the detection parameter, after determining that the link state of the AP1 meets the handover condition, the terminal starts a background scan to detect whether there is an AP with better signal quality.
  • Step 402 The terminal determines that there is a second access point AP2 with better signal quality, and establishes a second communication connection with the AP2 through the second workstation STA2 while maintaining the first communication connection.
  • Step 403 Perform link detection on the second communication connection, confirm that the link state of the second communication connection is better than the link state of the first communication connection, close the connection between STA1 and AP1, and maintain the connection between STA2 and AP2 to complete the link. Switch.
  • FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal 500 can include a communication module 501 and a processing module 502.
  • Figure 5 only shows a simplified design of the structure of the terminal.
  • the terminal structure shown in FIG. 5 does not constitute a limitation to the terminal, and the terminal may include more or less components than the illustration 5, for example, the terminal may further include a storage module for storing corresponding instructions of the communication algorithm. .
  • the processing module 502 is configured to instruct the communication module 501 to establish a first communication connection with the first access point through the first workstation; determine that the signal quality of the first access point meets the handover condition, and instruct the communication module 501 to detect The second access point establishes a second communication connection with the second access point through the second workstation; determining that the signal quality of the second access point is better than the signal quality of the first access point, indicating that the communication module 501 is disconnected Open the first communication connection.
  • the processing module 502 is further configured to instruct the communication module 501 to generate the second workstation before instructing the communication module 501 to establish a second communication connection with the second access point through the second workstation.
  • the first workstation operates above the first physical layer and the second workstation operates above the second physical layer.
  • the terminal includes a first wireless fidelity Wi-Fi chip, and the first Wi-Fi chip is used to generate the first workstation and the second workstation.
  • the terminal includes a first wireless fidelity Wi-Fi chip and a second Wi-Fi chip; a first Wi-Fi chip is used to generate a first workstation layer, and a second Wi-Fi chip is used to generate a second workstation.
  • the processing module 502 determines that the signal quality of the first access point meets the handover condition, and the processing module 502 instructs the communication module 501 to perform link detection on the first communication connection, and determines the first access according to the result of the link detection.
  • the signal quality of the point is in accordance with the switching conditions.
  • the processing module 502 determines that the signal quality of the second access point is better than the signal quality of the first access point, and the processing module 502 instructs the communication module 501 to perform link detection on the second communication connection, according to the link detection. The result determines that the signal quality of the second access point is better than the signal quality of the first access point.
  • the parameters of the link detection include received signal strength, packet error rate, and data transmission delay.
  • a terminal provided by the embodiment of the present invention establishes a connection with another access point through the second workstation while maintaining the connection between the first workstation and the current access point, and confirms that the signal quality of the other access point is better than the current After the signal quality of the access point, the connection between the first workstation and the current access point is disconnected and the connection between the second workstation and another access point is maintained, thereby achieving seamless handover between the terminal and the access point, and Improve the user experience.
  • FIG. 6 is a schematic structural diagram of another terminal according to an embodiment of the present invention.
  • the terminal includes: a radio frequency (RF) circuit 610, a memory 620, an input unit 630, a display unit 640, a processor 650, a wireless local area network (WLAN) module 660, and a power supply 670. And components such as the Bluetooth module 680.
  • RF radio frequency
  • FIG. 10 does not constitute a limitation to the terminal, and may include more or less components than those illustrated, or combine some components, or different component arrangements.
  • the RF circuit 610 can be used to send and receive information, for example, to connect to a mobile broadband.
  • RF circuit 610 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.
  • the RF circuit 610 can also forward the mobile bandwidth service to the WLAN module 660 to forward the mobile bandwidth service to other terminals through the WLAN module 660.
  • wireless communication can adopt any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), and code division multiple access (Code).
  • CDMA Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • E-mail Short Messaging Service
  • the memory 620 can be used to store program instructions, and the processor 650, by running program instructions stored in the memory 620, causes the terminal to perform the above-described method of wireless local area network access point switching as shown in FIGS. 2 and 3.
  • the memory 620 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system and an application program and the like required to implement the above-described method of wireless local area network access point switching.
  • the storage data area can store list information of the terminal and data generated by the terminal when performing the above-described method of wireless local area network access point switching.
  • the memory 620 may include a volatile memory such as a random-access memory (RAM); the memory 620 may also include a non-volatile memory, such as only Read-only memory (ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD).
  • RAM random-access memory
  • ROM Read-only memory
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory 620 can also include a combination of the above types of memory.
  • the input unit 630 can be configured to receive numeric or character information input by the user, including turning on a WLAN hotspot command, selecting an instruction of a terminal sharing the WLAN hotspot, and the like.
  • the input unit 630 may include a touch panel 631 and other input devices 632.
  • the touch panel 631 also referred to as a touch screen, can collect touch operations on or near the user (than If the user uses any suitable object or accessory such as a finger or a stylus on the touch panel 631 or in the vicinity of the touch panel 631, the corresponding connecting device is driven according to a preset program.
  • the touch panel 631 can include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the processor 650 is provided and can receive commands from the processor 650 and execute them.
  • the input unit 630 can implement the touch panel 631 by using various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 630 may also include other input devices 632.
  • other input devices 632 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.
  • the display unit 640 can be used to display information input by the user or information provided to the user as well as various menus of the terminal.
  • the display unit 640 can include a display screen 641.
  • the display screen 641 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch panel 631 can cover the display screen 641. When the touch panel 631 detects a touch operation on or near the touch panel 631, it transmits to the processor 650 to determine the type of the touch event, and then the processor 650 according to the touch event. The type provides a corresponding visual output on display 641.
  • the touch panel 631 and the display screen 641 are two independent components to implement the input and input functions of the terminal, in some embodiments, the touch panel 631 may be integrated with the display screen 641. Realize the input and output functions of the terminal.
  • the processor 650 is the control center of the terminal, and connects various parts of the entire terminal using various interfaces and lines, by executing or executing software programs and/or modules stored in the memory 620, and calling data stored in the memory 620, executing The method of wireless local area network access point switching as shown in FIG.
  • processor 650 can include one or more processing units.
  • the processor 650 can integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, an application, etc., and the modem processor mainly processes wireless communication. It can be understood that the above modem processor may not be integrated into the processor 650.
  • the WLAN module 660 can be used to assist users in sending and receiving emails, browsing web pages, and accessing streaming media, etc., which provides users with wireless broadband WLAN Internet access.
  • the WLAN is a short-range wireless transmission technology.
  • the terminal can access the WLAN hotspot through the WLAN module 660.
  • the WLAN hotspot can be enabled by the WLAN module 660 to forward the mobile bandwidth service to other terminals.
  • the WLAN module 660 can also perform Wi-Fi broadcast and scanning to enable wireless communication with other nearby terminals.
  • the terminal also includes a power source 670 (such as a battery) that supplies power to the various components.
  • a power source 670 such as a battery
  • the power source can be logically coupled to the processor 650 through the power management system to manage functions such as charging, discharging, and power consumption through the power management system.
  • the Bluetooth module 670 can be a Bluetooth Low Energy (BLE) device, a traditional Bluetooth device, or a dual-mode Bluetooth device supporting traditional Bluetooth and BLE.
  • BLE Bluetooth Low Energy
  • the Bluetooth module 670 establishes a BLE or classic Bluetooth connection with the Bluetooth modules of other terminals, and the Bluetooth module 670 can also perform BR or BLE broadcast and scanning to achieve wireless communication with other surrounding terminals.
  • the terminal may further include a camera, a speaker, etc., and details are not described herein again.
  • RF circuit 610, Bluetooth module 680, and WLAN module 660 may be collectively referred to as a wireless communication interface.
  • the terminal includes a processor 650, a memory 620, and a WLAN module 660.
  • the memory 620 is configured to store program instructions; the processor 650 is configured to perform, according to the program instructions stored in the memory 620, the operation of instructing the WLAN module 660 to establish a first communication connection with the first access point through the first workstation; Determine the first access The signal quality of the point conforms to the handover condition, instructing the WLAN module 660 to detect the second access point, instructing the WLAN module 660 to establish a second communication connection with the second access point through the second workstation; and determining the second access point The signal quality is better than the signal quality of the first access point, indicating that the WLAN module 660 disconnects the first communication connection.
  • the processor 650 is further configured to: according to the program instructions stored in the memory 620, perform the following operation: indicating the WLAN before instructing the WLAN module 660 to establish a second communication connection with the second access point through the second workstation Module 660 generates a second workstation.
  • the first workstation operates above the first physical layer and the second workstation operates above the second physical layer.
  • the WLAN module 660 includes a first wireless fidelity Wi-Fi chip for generating a first workstation and a second workstation.
  • the WLAN module 660 includes a first Wi-Fi chip and a second Wi-Fi chip; a first Wi-Fi chip is used to generate a first workstation, and a second Wi-Fi chip is used to generate a second workstation .
  • the processor 650 is specifically configured to: according to the program instructions stored in the memory 620, perform the following operations: instruct the WLAN module 660 to perform link detection on the first communication connection, and determine a signal of the first access point according to the result of the link detection. The quality meets the switching conditions.
  • the processor 650 is specifically configured to: according to the program instructions stored in the memory 620, perform the following operations: instruct the WLAN module 660 to perform link detection on the second communication connection, and determine a signal of the second access point according to the result of the link detection. The quality is better than the signal quality of the first access point.
  • the parameters of the link detection include received signal strength, packet error rate, and data transmission delay.
  • a terminal provided by the embodiment of the present invention establishes a connection with another access point through the second workstation while maintaining the connection between the first workstation and the current access point, and confirms that the signal quality of the other access point is better than the current After the signal quality of the access point, the connection between the first workstation and the current access point is disconnected and the connection between the second workstation and another access point is maintained, thereby achieving seamless handover between the terminal and the access point, and Improve the user experience.
  • the steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both.
  • the software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

Abstract

本发明实施例提供一种无线局域网接入点切换的方法和终端。该方法包括：终端通过第一工作站建立与第一接入点之间的第一通信连接；终端确定第一接入点的信号质量符合切换条件，终端检测第二接入点，终端通过第二工作站建立与第二接入点之间的第二通信连接；终端确定第二接入点的信号质量优于第一接入点的信号质量，终端断开第一通信连接。该终端包括通信模块和处理模块。本发明实施例中，终端在保持第一工作站与当前接入点连接的同时，通过第二工作站与另一接入点建立连接，在确认另一接入点的信号质量优于当前接入点的信号质量后，断开第一工作站与当前接入点的连接并保留第二工作站与另一接入点的连接，从而实现了终端与接入点之间的无缝切换。

Description

无线局域网接入点切换的方法和终端
本申请要求于2016年12月1日提交中国国家知识产权局专利局、申请号为201611091353.2、发明名称为“一种在多个无线局域网接入点之间无缝切换的方法和设备”的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
本发明涉及通信技术领域，尤其涉及一种无线局域网接入点切换的方法和终端。
背景技术
随着移动网络的不断发展，移动上网变得非常普遍。而无线保真(Wireless-Fidelity，Wi-Fi)作为一种允许电子设备连接到一个无线局域网(Wireless Local Area Networks，WLAN)的技术，因其具有传输速度快、廉价等优势，受到越来越多用户的青睐。同时，在一些咖啡厅、大型办公室、大型商场、体育场、地铁站等公共场所，分布的Wi-Fi无线局域网接入点(Access Point，AP)，即Wi-Fi AP越来越多。因Wi-Fi AP的覆盖范围有限，终端在移动过程中需要在多个Wi-Fi AP之间进行切换。上述终端包括手机、路由器、移动Wi-Fi等包含Wi-Fi功能的设备。
现有技术中，当终端在不同的Wi-Fi AP的覆盖范围之间移动时，需要先断开与当前Wi-Fi AP的连接，再连接到另一个Wi-Fi AP，在此期间必然会导致终端数据业务的中断，短则几秒，多则几十秒。数据业务的中断将降低用户体验，尤其是在终端依赖Wi-Fi使用网络的情况下，如终端处于家庭分布式Wi-Fi网络环境或地铁站、地下停车场等信号较差的场所中。
发明内容
本发明实施例提供了一种无线局域网接入点切换的方法和终端，以解决无线局域网接入点切换过程中数据业务中断的问题。
第一方面，本发明提供了一种无线局域网接入点切换的方法。终端通过第一工作站建立与第一接入点之间的第一通信连接；终端确定第一接入点的信号质量符合切换条件，终端检测第二接入点，终端通过第二工作站建立与第二接入点之间的第二通信连接；终端确定第二接入点的信号质量优于第一接入点的信号质量，终端断开第一通信连接。
本发明实施例中，终端在保持第一工作站与当前接入点连接的同时，通过第二工作站与另一接入点建立连接，在确认另一接入点的信号质量优于当前接入点的信号质量后，断开第一工作站与当前接入点的连接并保留第二工作站与另一接入点的连接，从而实现了终端与接入点之间的无缝切换，并提高了用户体验。
在一种可能的实施方式中，终端通过第二工作站建立与第二接入点之间的第二通信连接之前，方法还包括：终端生成第二工作站。根据该实施方式，终端在保持第一工作站与当前接入点连接的同时，可以通过生成第二工作站，与另一连接点建立连接。
在一种可能的实施方式中，第一工作站工作在第一物理层之上，第二工作站工作在 第二物理层之上。
在一种可能的实施方式中，终端包括第一无线保真Wi-Fi芯片，第一Wi-Fi芯片用于生成第一工作站和第二工作站。
在一种可能的实施方式中，终端包括第一无线保真Wi-Fi芯片和第二Wi-Fi芯片；第一Wi-Fi芯片用于生成第一工作站，第二Wi-Fi芯片用于生成第二工作站。
在一种可能的实施方式中，终端确定第一接入点的信号质量符合切换条件，包括：终端对第一通信连接进行链路检测，根据链路检测的结果确定第一接入点的信号质量符合切换条件。
在一种可能的实施方式中，终端确定第二接入点的信号质量优于第一接入点的信号质量，包括：终端对第二通信连接进行链路检测，根据链路检测的结果确定第二接入点的信号质量优于第一接入点的信号质量。
在一种可能的实施方式中，链路检测的参数包括接收信号强度、误包率和数据传输时延。
第二方面，本发明实施例提供了一种终端，该终端可以实现上述第一方面的无线局域网接入点切换的方法中终端所执行的功能，功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。硬件或软件包括一个或多个上述功能相应的模块。
在一个可能的设计中，该终端包括通信模块和处理模块；处理模块用于控制通信模块通过第一工作站建立与第一接入点之间的第一通信连接；确定第一接入点的信号质量符合切换条件，检测第二接入点，控制通信模块通过第二工作站建立与第二接入点之间的第二通信连接；确定第二接入点的信号质量优于第一接入点的信号质量，控制通信模块断开第一通信连接。
在一个可能的设计中，处理模块还用于在控制通信模块通过第二工作站建立与第二接入点之间的第二通信连接之前，生成第二工作站。
在一个可能的设计中，第一工作站工作在第一物理层之上，第二工作站工作在第二物理层之上。
在一个可能的设计中，终端包括第一无线保真Wi-Fi芯片，第一Wi-Fi芯片用于生成第一工作站和第二工作站。
在一个可能的设计中，终端包括第一无线保真Wi-Fi芯片和第二Wi-Fi芯片；第一Wi-Fi芯片用于生成第一工作站，第二Wi-Fi芯片用于生成第二工作站。
在一个可能的设计中，处理模块确定第一接入点的信号质量符合切换条件，包括：处理模块对第一通信连接进行链路检测，根据链路检测的结果确定第一接入点的信号质量符合切换条件。
在一个可能的设计中，处理模块确定第二接入点的信号质量优于第一接入点的信号质量，包括：处理模块对第二通信连接进行链路检测，根据链路检测的结果确定第二接入点的信号质量优于第一接入点的信号质量。
在一个可能的设计中，链路检测的参数包括接收信号强度、误包率和数据传输时延。
第三方面，本发明实施例提供了一种终端，该终端可以实现上述第一方面的无线局域 网接入点切换的方法中终端所执行的功能。
在一个可能的设计中，该终端包括处理器、存储器和无线局域网WLAN模块。存储器用于存储程序指令；处理器用于根据存储器中存储的程序指令执行下述操作：指示WLAN模块通过第一工作站建立与第一接入点之间的第一通信连接；以及确定第一接入点的信号质量符合切换条件，指示WLAN模块检测第二接入点，指示WLAN模块通过第二工作站建立与第二接入点之间的第二通信连接；以及确定第二接入点的信号质量优于第一接入点的信号质量，指示WLAN模块断开第一通信连接。
在一个可能的设计中，处理器还用于根据存储器中存储的程序指令执行以下操作：在指示WLAN模块通过第二工作站建立与第二接入点之间的第二通信连接之前，指示WLAN模块生成第二工作站。
在一个可能的设计中，第一工作站工作在第一物理层之上，第二工作站工作在第二物理层之上。
在一个可能的设计中，WLAN模块包括第一无线保真Wi-Fi芯片，第一Wi-Fi芯片第一Wi-Fi芯片用于生成第一工作站和第二工作站。
在一个可能的设计中，WLAN模块包括第一Wi-Fi芯片和第二Wi-Fi芯片；第一Wi-Fi芯片用于生成第一工作站，第二Wi-Fi芯片用于生成第二工作站。
在一个可能的设计中，处理器具体用于根据存储器中存储的程序指令执行以下操作：指示WLAN模块对第一通信连接进行链路检测，根据链路检测的结果确定第一接入点的信号质量符合切换条件。
在一个可能的设计中，处理器具体用于根据存储器中存储的程序指令执行以下操作：指示WLAN模块对第二通信连接进行链路检测，根据链路检测的结果确定第二接入点的信号质量优于第一接入点的信号质量。
在一个可能的设计中，链路检测的参数包括接收信号强度、误包率和数据传输时延。
基于本发明实施例提供的一种无线局域网接入点切换的方法和终端，终端在保持第一工作站与当前接入点连接的同时，通过第二工作站与另一接入点建立连接，在确认另一接入点的信号质量优于当前接入点的信号质量后，断开第一工作站与当前接入点的连接并保留第二工作站与另一接入点的连接，从而实现了终端与接入点之间的无缝切换，并提高了用户体验。
附图说明
图1为本发明实施例提供的通信系统架构示意图；
图2为本发明实施例提供的一种无线局域网接入点切换的方法通信示意图；
图3为本发明实施例提供的另一种无线局域网接入点切换的方法通信示意图；
图4为本发明实施例提供的终端进行接入点切换的应用场景示意图；
图5为本发明实施例提供的一种终端的结构示意图；
图6为本发明实施例提供的另一种终端的结构示意图。
具体实施方式
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描述。
本发明实施例描述的网络架构以及业务场景是为了更加清楚的说明本发明实施例的技术方案，并不构成对于本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
图1为本发明实施例提供的通信系统架构示意图。如图1所示，该通信系统包括至少一个终端10、至少两个无线局域网接入点20和21。图中仅画出了一个终端和两个接入点,实际中可以有更多的终端和更多的接入点,本发明实施例对此不作限定。
本发明实施例中无线局域网接入点可以为Wi-Fi AP，或者支持其它无线接入技术的AP，只要能够将终端通过无线接入技术接入网络的接入点都属于本发明实施例保护的范围，在此不再赘述。
本发明实施例中终端可以为包含Wi-Fi功能的手机，电脑等设备，或者支持其它无线接入技术的设备，只要能够连接至无线局域网接入点的设备都属于本发明实施例保护的范围，在此不再赘述。
本发明实施例提供的一种无线局域网接入点切换的方法，终端在保持第一工作站与当前接入点连接的同时，通过第二工作站与另一接入点建立连接，在确认另一接入点的信号质量优于当前接入点的信号质量后，断开第一工作站与当前接入点的连接并保留第二工作站与另一接入点的连接，从而实现了终端与接入点之间的无缝切换，并提高了用户体验。
图2为本发明实施例提供的一种无线局域网接入点切换的方法通信示意图。如图2所示，该实施例可以包括：
步骤201，终端通过第一工作站建立与第一接入点之间的第一通信连接。
示例性的，第一接入点为无线局域网接入点，例如Wi-Fi AP。
示例性的，第一通信连接为无线链路连接。无线链路连接的建立过程包括：工作站与接入点之间进行链路认证，以及协商无线链路的服务参数。
步骤202，终端确定第一接入点的信号质量符合切换条件，终端检测第二接入点，终端通过第二工作站建立与第二接入点之间的第二通信连接。
示例性的，终端确定第一接入点的信号质量符合切换条件，包括：终端对第一通信连接进行链路检测，根据链路检测的结果确定第一接入点的信号质量符合切换条件。
示例性的，终端对第一通信连接定期进行链路检测。例如，设定一个检测周期，每经过一个检测周期，进行一次链路检测。
示例性的，链路检测的参数可以包括接收信号强度、误包率和数据传输时延。
示例性的，切换条件可以为一个综合判断标准。例如，接收信号强度低于-78dBm，误包率大于5％，数据传输时延大于1秒。
示例性的，根据基于链路检测参数的综合算法，对链路检测的结果，即参数值进行综合评分并设定预设门限，切换条件可以为综合评分大于预设门限。综合算法可以为对接收信号强度、误包率和数据传输时延等参数分配不同的权重，并根据参数值进行打分。例如，接收信号强度对应的参数值为-60dBm，因-60dBm大于-78dBm，不满足 接收信号强度低于-78dBm的条件，所以该参数值打分为0；误包率对应的参数值为6％，因6％大于5％，满足误包率高于5％的条件，所以该参数值打分为4分；数据传输时延的参数值为1.5秒，因1.5秒大于1秒，满足数据传输时延大于1秒的条件，所以该参数值打分为3分。对不同的参数赋予不同的权重，如表1所示。根据表1可以计算出该组参数值的综合评分为2.4分，预设门限的设定值为2.1分。因综合评分2.4分大于预设门限2.1分，因而符合切换条件。
(表1)
参数 接收信号强度 误包率 数据传输时延
权重 0.3 0.3 0.4
物理层(Physical Layer)是开放式通信系统互联参考模型(Open Systems Interconnection Reference Model，OSI/RM)中最低的一层。物理层规定:为传输数据所需要的物理链路创建、维持、拆除，而提供具有机械的，电子的，功能的和规范的特性。物理层为设备之间的数据通信提供传输媒体及互连设备，为数据传输提供可靠的环境。通常，在实际中，一个终端包括一个Wi-Fi芯片，一个Wi-Fi芯片包括一个物理层。同时，存在一个终端包括两个Wi-Fi芯片或者一个Wi-Fi芯片包括两个物理层的情况，这两个Wi-Fi芯片或者物理层可以提供2.4G频段和5G频段同时并发的场景。例如，用户可以在一个终端上同时使用2.4G频段和5G频段。其中，2.4G频段和5G频段为物理层公用的两个射频频段，本发明实施例中Wi-Fi芯片还可以支持其他的频段,本发明实施例对此不作限定。
示例性的，第一工作站工作在第一物理层之上，第二工作站工作在第二物理层之上。
示例性的，终端包括第一Wi-Fi芯片，第一Wi-Fi芯片用于生成第一工作站和第二工作站。
示例性的，终端包括第一Wi-Fi芯片和第二Wi-Fi芯片；第一Wi-Fi芯片用于生成第一工作站，第二Wi-Fi芯片用于生成第二工作站。
第一物理层和第二物理层可以工作在相同的频段，也可以工作在不同的频段。示例性的，第一物理层在2.4G频段上工作，第二物理层在5G频段上工作。
示例性的，终端确定第一接入点的信号质量符合切换条件，终端进行扫描以探测周围存在的其它接入点，并从扫描到的其它接入点中选择第二接入点，终端通过第二工作站建立与第二接入点之间的第二通信连接。
示例性的，终端可以采用主动扫描或者被动扫描的方式探测周围存在的其它接入点。扫描是指终端的工作站搜索无线网络的过程。
示例性的，终端在主动扫描情况下，第二工作站主动在其所支持的信道上依次发送探测信号，即探测请求帧(Probe Request)，用于探测周围存在的无线网络。
示例性的，终端在被动扫描的情况下，第二工作站不会主动发送探测请求报文，而是被动的接收周围的接入点定期发送的信标帧。
示例性的，终端从扫描到的其它接入点中选择信号强度最高的接入点作为第二接入点。
示例性的，终端从扫描到的其它接入点中选择曾连接过的接入点作为第二接入点。
步骤203，终端确定第二接入点的信号质量优于第一接入点的信号质量，终端断开第一通信连接。
示例性的，终端确定第二接入点的信号质量优于第一接入点的信号质量，包括：终端对第二通信连接和第一通信连接进行链路检测，根据所述链路检测的结果确定所述第二接入点的信号质量优于所述第一接入点的信号质量。
示例性的，基于链路检测的参数值，对第一接入点的信号质量和第二接入点信号质量的判断。对链路检测的参数的描述参见上文，在此不作赘述。
本发明实施例提供的一种无线局域网接入点切换的方法，在保持第一工作站与当前接入点连接的同时，通过第二工作站与另一接入点建立连接，在确认另一接入点的信号质量优于当前接入点的信号质量后，断开第一工作站与当前接入点的连接并保留第二工作站与另一接入点的连接，从而实现了终端与接入点之间的无缝切换，并提高了用户体验。
图3为本发明实施例提供的另一种无线局域网接入点切换的方法通信示意图。如图3所示，该实施例可以包括：
步骤301，终端通过第一工作站建立与第一接入点之间的第一通信连接。
步骤302，终端生成第二工作站。
示例性的，终端生成工作在第一物理层之上的第二工作站。
示例性的，终端包括第一Wi-Fi芯片，第一Wi-Fi芯片用于生成第一工作站和第二工作站。
示例性的，终端通过Wi-Fi芯片分时虚拟出工作在第一物理层之上第二工作站。第一工作站也工作在第一物理层之上，第一工作站和第二工作站可以通过分时的方法分别工作在第一频段和第二频段。第一频段和第二频段可以相同，也可以不同。例如，设定25ms为一个周期，第一工作站在第一个周期内工作在第一频段，第二工作站在第二个周期内工作在第二频段，如此交替进行。其中，第一频段和第二频段可以相同，均为2.4G频段或5G频段；第一频段和第二频段也可以不同，如第一频段为2.4G频段、第二频段为5G频段，或第一频段为5G频段、第二频段为2.4G频段。示例性的，第一工作站在第一个周期内工作在第一频段时，终端向第一接入点广播消息，该消息用于告知第一接入点：在接下来的第二工作周期内，第一工作站处于休眠状态，即在第二工作周期内，终端将不通过第一工作站进行数据的接收和发送。同样的，第二工作站在第二个周期内工作在第二频段时，终端向第二接入点广播消息，该消息用于告知第二接入点：在接下来的第三工作周期内，第二工作站处于休眠状态，即在第三工作周期内，终端将不通过第二工作站进行数据的接收和发送。示例性的，第二工作站为代理工作站(proxy station)。示例性的，第一工作站和第二工作站共用第一物理层的射频器件，从逻辑上(如链路层和网络层等)来看是两个完整的工作站在交替工作。
示例性的，终端通过软件虚拟出工作在第一物理层之上的第二工作站。
步骤303，终端确定第一接入点的信号质量符合切换条件，终端检测第二接入点，终端通过第二工作站建立与第二接入点之间的第二通信连接。
步骤304，终端确定第二接入点的信号质量优于第一接入点的信号质量，终端断 开第一通信连接。
需要说明的是，步骤301、303、304可以参考上述对图2中步骤201-203的详细介绍，在此不作赘述。
本发明实施例提供的一种无线局域网接入点切换的方法，在保持第一工作站与当前接入点连接的同时，通过生成第二工作站，并与另一接入点建立连接，在确认另一接入点的信号质量优于当前接入点的信号质量后，断开第一工作站与当前接入点的连接并保留第二工作站与另一接入点的连接，从而实现了终端与接入点之间的无缝切换，并提高了用户体验。
图4为本发明实施例提供的终端进行接入点切换的应用场景示意图。如图4所示，终端进行接入点切换的步骤包括：
步骤401，第一工作站STA1通过Wi-Fi与第一接入点AP1建立第一通信连接，终端定期检测AP1的链路状态，检测参数包括：接收信号强度、误包率、数据传输时延等因素。根据检测参数的结果，确定AP1的链路状态符合切换条件后，终端启动背景扫描，检测是否存在信号质量更好的AP。
步骤402，终端确定存在信号质量更好的第二接入点AP2，在保持第一通信连接不断的情况下，通过第二工作站STA2与AP2建立第二通信连接。
步骤403，对第二通信连接进行链路检测，确认第二通信连接的链路状态优于第一通信连接的链路状态，关闭STA1和AP1的连接，保留STA2和AP2的连接，完成链路切换。
上文中结合图1至图4，详细描述了根据本发明实施例的无线局域网接入点切换的方法，下面根据图5和图6，详细描述根据本发明实施例终端。
图5为本发明实施例提供的一种终端的结构示意图。该终端500可以包括通信模块501和处理模块502。
本领域技术人员可以理解，图5仅仅示出了终端的结构的简化设计。图5中示出的终端结构并不构成对终端的限定，该终端可以包括比图示5更多或更少的部件，例如，该终端还可以包括用于存储通信算法相应的指令的存储模块。
图5中，处理模块502用于指示通信模块501通过第一工作站建立与第一接入点之间的第一通信连接；确定第一接入点的信号质量符合切换条件，指示通信模块501检测第二接入点并通过第二工作站建立与第二接入点之间的第二通信连接；确定第二接入点的信号质量优于第一接入点的信号质量，指示通信模块501断开第一通信连接。
示例性的，处理模块502还用于在指示通信模块501通过第二工作站建立与第二接入点之间的第二通信连接之前，指示通信模块501生成第二工作站。
示例性的，第一工作站工作在第一物理层之上，第二工作站工作在第二物理层之上。
示例性的，终端包括第一无线保真Wi-Fi芯片，第一Wi-Fi芯片用于生成第一工作站和第二工作站。
示例性的，终端包括第一无线保真Wi-Fi芯片和第二Wi-Fi芯片；第一Wi-Fi芯片用于生成第一工作站层，第二Wi-Fi芯片用于生成第二工作站。
示例性的，处理模块502确定第一接入点的信号质量符合切换条件，包括：处理模块502指示通信模块501对第一通信连接进行链路检测，根据链路检测的结果确定第一接入点的信号质量符合切换条件。
示例性的，处理模块502确定第二接入点的信号质量优于第一接入点的信号质量，包括：处理模块502指示通信模块501对第二通信连接进行链路检测，根据链路检测的结果确定第二接入点的信号质量优于第一接入点的信号质量。
示例性的，链路检测的参数包括接收信号强度、误包率和数据传输时延。
本发明实施例提供的一种终端，在保持第一工作站与当前接入点连接的同时，通过第二工作站与另一接入点建立连接，在确认另一接入点的信号质量优于当前接入点的信号质量后，断开第一工作站与当前接入点的连接并保留第二工作站与另一接入点的连接，从而实现了终端与接入点之间的无缝切换，并提高了用户体验。
图6为本发明实施例提供的另一种终端的结构示意图。如图6所示，该终端包括：射频(Radio Frequency，RF)电路610、存储器620、输入单元630、显示单元640、处理器650、无线局域网(Wireless Local Area Networks，WLAN)模块660、电源670以及蓝牙模块680等部件。本领域技术人员可以理解，图10示出的终端结构并不构成对终端的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
RF电路610可用于收发信息，例如，连接移动宽带。通常，RF电路610包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(Low Noise Amplifier，LNA)、双工器等。此外，RF电路610还可以将移动带宽业务转发至WLAN模块660，以通过WLAN模块660将移动带宽业务转发给其他终端。其中，无线通信可以采用任一通信标准或协议，包括但不限于全球移动通讯系统(Global System of Mobile communication，GSM)、通用分组无线服务(General Packet Radio Service，GPRS)、码分多址(Code Division Multiple Access，CDMA)、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)、长期演进(Long Term Evolution，LTE)、电子邮件、短消息服务(Short Messaging Service，SMS)等。
存储器620可用于存储程序指令，处理器650通过运行存储在存储器620的程序指令，从而使得该终端执行上述如图图2和图3所示的无线局域网接入点切换的方法。存储器620可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统以及实现上述无线局域网接入点切换的方法所需的应用程序等。存储数据区可存储终端的列表信息以及该终端在执行上述无线局域网接入点切换的方法时产生的数据等。此外，存储器620可包括易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；所述存储器620也可以包括非易失性存储器(non-volatile memory)，例如只读存储器(read-only memory，ROM)，快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)。所述存储器620还可以包括上述种类的存储器的组合。
输入单元630可用于接收用户输入的数字或字符信息，包括开启WLAN热点指令、选择共享WLAN热点的终端的指令等。具体地，输入单元630可包括触控面板631以及其他输入设备632。触控面板631，也称为触摸屏，可收集用户在其上或附近的触摸操作(比 如用户使用手指、触笔等任何适合的物体或附件在触控面板631上或在触控面板631附近的操作)，并根据预先设定的程式驱动相应的连接装置。可选的，触控面板631可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器650，并能接收处理器650发来的命令并加以执行。此外，输入单元630可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板631。除了触控面板631，输入单元630还可以包括其他输入设备632。具体地，其他输入设备632可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆等中的一种或多种。
显示单元640可用于显示由用户输入的信息或提供给用户的信息以及终端的各种菜单。显示单元640可包括显示屏641，可选的，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示屏641。进一步的，触控面板631可覆盖显示屏641，当触控面板631检测到在其上或附近的触摸操作后，传送给处理器650以确定触摸事件的类型，随后处理器650根据触摸事件的类型在显示屏641上提供相应的视觉输出。虽然在图6中，触控面板631与显示屏641是作为两个独立的部件来实现终端的输入和输入功能，但是在某些实施例中，可以将触控面板631与显示屏641集成而实现终端的输入和输出功能。
处理器650是终端的控制中心，利用各种接口和线路连接整个终端的各个部分，通过运行或执行存储在存储器620内的软件程序和/或模块，以及调用存储在存储器620内的数据，执行如图9所示的无线局域网接入点切换的方法。可选的，处理器650可包括一个或多个处理单元。优选的，处理器650可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器650中。
WLAN模块660可用于帮助用户收发电子邮件、浏览网页和访问流式媒体等，它为用户提供了无线的宽带WLAN互联网访问。WLAN属于短距离无线传输技术，终端可通过WLAN模块660接入WLAN热点，也可通过WLAN模块660开启WLAN热点，将移动带宽业务转发给其他终端。WLAN模块660还可进行Wi-Fi广播和扫描，以实现与周围其他终端的无线通信。
终端还包括给各个部件供电的电源670(比如电池)，可选的，电源可以通过电源管理系统与处理器650逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗等功能。
蓝牙模块670，可以是低功耗蓝牙(Bluetooth Low Energy，BLE)设备，也可以是传统蓝牙设备，也可以是支持传统蓝牙和BLE的双模蓝牙设备。蓝牙模块670与其他终端的蓝牙模块建立BLE或经典蓝牙连接，蓝牙模块670还可进行BR或BLE广播和扫描，以实现与周围其他终端的无线通信。
尽管未示出，终端还可以包括摄像头、扬声器等，在此不再赘述。
示例性的，可将RF电路610、蓝牙模块680以及WLAN模块660统称为无线通信接口。
示例性的，该终端包括处理器650、存储器620和WLAN模块660。存储器620用于存储程序指令；处理器650用于根据存储器620中存储的程序指令执行下述操作：指示WLAN模块660通过第一工作站建立与第一接入点之间的第一通信连接；以及确定第一接入 点的信号质量符合切换条件，指示WLAN模块660检测第二接入点，指示WLAN模块660通过第二工作站建立与第二接入点之间的第二通信连接；以及确定第二接入点的信号质量优于第一接入点的信号质量，指示WLAN模块660断开第一通信连接。
示例性的，处理器650，还用于根据存储器620中存储的程序指令执行以下操作：在指示WLAN模块660通过第二工作站建立与第二接入点之间的第二通信连接之前，指示WLAN模块660生成第二工作站。
示例性的，第一工作站工作在第一物理层之上，第二工作站工作在第二物理层之上。
示例性的，WLAN模块660包括第一无线保真Wi-Fi芯片，第一Wi-Fi芯片用于生成第一工作站和第二工作站。
在一个可能的设计中，WLAN模块660包括第一Wi-Fi芯片和第二Wi-Fi芯片；第一Wi-Fi芯片用于生成第一工作站，第二Wi-Fi芯片用于生成第二工作站。
示例性的，处理器650具体用于根据存储器620中存储的程序指令执行以下操作：指示WLAN模块660对第一通信连接进行链路检测，根据链路检测的结果确定第一接入点的信号质量符合切换条件。
示例性的，处理器650具体用于根据存储器620中存储的程序指令执行以下操作：指示WLAN模块660对第二通信连接进行链路检测，根据链路检测的结果确定第二接入点的信号质量优于第一接入点的信号质量。
示例性的，链路检测的参数包括接收信号强度、误包率和数据传输时延。
本发明实施例提供的一种终端，在保持第一工作站与当前接入点连接的同时，通过第二工作站与另一接入点建立连接，在确认另一接入点的信号质量优于当前接入点的信号质量后，断开第一工作站与当前接入点的连接并保留第二工作站与另一接入点的连接，从而实现了终端与接入点之间的无缝切换，并提高了用户体验。
结合本文中所公开的实施例描述的方法或算法的步骤可以用硬件、处理器执行的软件模块，或者二者的结合来实施。软件模块可以置于随机存储器(RAM)、内存、只读存储器(ROM)、电可编程ROM、电可擦除可编程ROM、寄存器、硬盘、可移动磁盘、CD-ROM、或技术领域内所公知的任意其它形式的存储介质中。
以上所述的具体实施方式，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施方式而已，并不用于限定本发明的保护范围，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (24)

  1. 一种无线局域网接入点切换的方法，其特征在于，所述方法包括：
    终端通过第一工作站建立与第一接入点之间的第一通信连接；
    所述终端确定所述第一接入点的信号质量符合切换条件，所述终端检测第二接入点，所述终端通过第二工作站建立与所述第二接入点之间的第二通信连接；
    所述终端确定所述第二接入点的信号质量优于所述第一接入点的信号质量，所述终端断开所述第一通信连接。
  2. 根据权利要求1所述的方法，其特征在于，所述终端通过第二工作站建立与所述第二接入点之间的第二通信连接之前，所述方法还包括：
    所述终端生成所述第二工作站。
  3. 根据权利要求1所述的方法，其特征在于，所述第一工作站工作在第一物理层之上，所述第二工作站工作在第二物理层之上。
  4. 根据权利要求3所述的方法，其特征在于，所述终端包括第一无线保真Wi-Fi芯片，所述第一Wi-Fi芯片用于生成所述第一工作站和所述第二工作站。
  5. 根据权利要求3所述的方法，其特征在于，所述终端包括第一Wi-Fi芯片和第二Wi-Fi芯片；所述第一Wi-Fi芯片用于生成所述第一工作站，所述第二Wi-Fi芯片用于生成所述第二工作站。
  6. 根据权利要求1所述的方法，其特征在于，所述终端确定所述第一接入点的信号质量符合切换条件，包括：
    所述终端对所述第一通信连接进行链路检测，根据所述链路检测的结果确定所述第一接入点的信号质量符合切换条件。
  7. 根据权利要求1所述的方法，其特征在于，所述终端确定所述第二接入点的信号质量优于所述第一接入点的信号质量，包括：
    所述终端对所述第二通信连接进行链路检测，根据所述链路检测的结果确定所述第二接入点的信号质量优于所述第一接入点的信号质量。
  8. 根据权利要求6或7所述的方法，所述链路检测的参数包括接收信号强度、误包率和数据传输时延。
  9. 一种终端，其特征在于，所述终端包括：通信模块和处理模块；
    所述处理模块用于指示所述通信模块通过第一工作站建立与第一接入点之间的第一通信连接；确定所述第一接入点的信号质量符合切换条件，指示所述通信模块检测第二接入点，指示所述通信模块通过第二工作站建立与所述第二接入点之间的第二通信连接；确定所述第二接入点的信号质量优于所述第一接入点的信号质量，指示所述通信模块断开所述第一通信连接。
  10. 根据权利要求9所述的终端，其特征在于，所述处理模块，还用于在指示所述通信模块通过第二工作站建立与所述第二接入点之间的第二通信连接之前，指示所述通信模块生成所述第二工作站。
  11. 根据权利要求9所述的终端，其特征在于，所述第一工作站工作在所述第一物理层之上，所述第二工作站工作在所述第二物理层之上。
  12. 根据权利要求11所述的终端，其特征在于，所述终端包括第一无线保真Wi-Fi芯片，所述第一Wi-Fi芯片用于生成所述第一工作站和所述第二工作站。。
  13. 根据权利要求11所述的终端，其特征在于，所述终端包括第一Wi-Fi芯片和第二Wi-Fi芯片；所述第一Wi-Fi芯片用于生成所述第一工作站，所述第二Wi-Fi芯片用于生成所述第二工作站。
  14. 根据权利要求9所述的终端，其特征在于，所述处理模块确定所述第一接入点的信号质量符合切换条件，包括：
    所述处理模块对所述第一通信连接进行链路检测，根据所述链路检测的结果确定所述第一接入点的信号质量符合切换条件。
  15. 根据权利要求9所述的终端，其特征在于，所述处理模块确定所述第二接入点的信号质量优于所述第一接入点的信号质量，包括：
    所述处理模块指示所述通信模块对所述第二通信连接进行链路检测，根据所述链路检测的结果确定所述第二接入点的信号质量优于所述第一接入点的信号质量。
  16. 根据权利要求14或15所述的终端，其特征在于，所述链路检测的参数包括接收信号强度、误包率和数据传输时延。
  17. 一种终端，其特征在于，所述终端包括：处理器、存储器和无线局域网WLAN模块；
    所述存储器，用于存储程序指令；
    所述处理器，用于根据所述存储器中存储的程序指令执行以下操作：
    指示所述WLAN模块通过第一工作站建立与第一接入点之间的第一通信连接；以及确定所述第一接入点的信号质量符合切换条件，指示所述WLAN模块检测第二接入点，指示所述WLAN模块通过第二工作站建立与所述第二接入点之间的第二通信连接；以及确定所述第二接入点的信号质量优于所述第一接入点的信号质量，指示所述WLAN模块断开所述第一通信连接。
  18. 根据权利要求17所述的终端，其特征在于，所述处理器，还用于根据所述存储器中存储的程序指令执行以下操作：在指示所述WLAN模块通过第二工作站建立与所述第二接入点之间的第二通信连接之前，指示所述WLAN模块生成所述第二工作站。
  19. 根据权利要求17所述的终端，其特征在于，所述第一工作站工作在所述第一物理层之上，所述第二工作站工作在所述第二物理层之上。
  20. 根据权利要求19所述的终端，其特征在于，所述WLAN模块包括第一无线保真Wi-Fi芯片，所述第一Wi-Fi芯片用于生成所述第一工作站和所述第二工作站。
  21. 根据权利要求19所述的终端，其特征在于，所述WLAN模块包括第一Wi-Fi芯片和第二Wi-Fi芯片；所述第一Wi-Fi芯片用于生成所述第一工作站，所述第二Wi-Fi芯片用于生成所述第二工作站。
  22. 根据权利要求17所述的终端，其特征在于，所述处理器，具体用于根据所述存储器中存储的程序指令执行以下操作：
    指示所述WLAN模块对所述第一通信连接进行链路检测，根据所述链路检测的结果确定所述第一接入点的信号质量符合切换条件。
  23. 根据权利要求17所述的终端，其特征在于，所述处理器，具体用于根据所述存储器中存储的程序指令执行以下操作：
    指示所述WLAN模块对所述第二通信连接进行链路检测，根据所述链路检测的结果确定所述第二接入点的信号质量优于所述第一接入点的信号质量。
  24. 根据权利要求22或23所述的终端，其特征在于，所述链路检测的参数包括接收信号强度、误包率和数据传输时延。
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