WO2015027414A1 - 一种通信方法、站点及系统 - Google Patents

一种通信方法、站点及系统 Download PDF

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Publication number
WO2015027414A1
WO2015027414A1 PCT/CN2013/082480 CN2013082480W WO2015027414A1 WO 2015027414 A1 WO2015027414 A1 WO 2015027414A1 CN 2013082480 W CN2013082480 W CN 2013082480W WO 2015027414 A1 WO2015027414 A1 WO 2015027414A1
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WO
WIPO (PCT)
Prior art keywords
access point
message
communication
response message
station
Prior art date
Application number
PCT/CN2013/082480
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English (en)
French (fr)
Inventor
杨浔
姜艳平
赵牧
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.)
Filing date
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 PCT/CN2013/082480 priority Critical patent/WO2015027414A1/zh
Priority to CN201380078449.3A priority patent/CN105409291B/zh
Publication of WO2015027414A1 publication Critical patent/WO2015027414A1/zh
Priority to US15/047,345 priority patent/US20160165533A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method, a station, and a system. Background technique
  • wireless devices such as access points (APs) and stations (Stations) are deployed more and more, in densely deployed wireless LANs, due to continuous
  • BSSs Basic Service Sets
  • OBSS Overlapped Basic Service Set
  • STAs in adjacent BSS overlapping areas will be affected by multiple BSSs within the sensing range when communicating, and the probability of competing to the channel is lower than that of STAs in non-overlapping areas.
  • the STA throughput of the overlapping area is low, and information interaction may fail even when communicating with the AP.
  • STAs in an overlapping area in an OBSS system can simultaneously receive characteristics from multiple AP signals, allowing the STA to manage and communicate with more than one AP, specifically by being associated with multiple APs. Moreover, different sleep times are set between different BSSs to perform wake-up in turn, thereby implementing time-division communication with different APs.
  • STA1 is in an overlapping area of adjacent BSS1 and BSS2, and STA2 is only in a coverage area of BSS2, so STA1 can simultaneously receive a signal from an API corresponding to BSS1 and a signal from AP2 corresponding to BSS2.
  • STA1 in the overlapping area wakes up in BSS1.
  • the probability that STA1 will contend to the channel is still equal to the probability of competing to the channel in BSS1 alone.
  • any AP corresponding to the BSS1 API or the AP2 corresponding to the BSS2 transmits information to other STAs, the STA1 in the overlapping area cannot compete for the channel, so the probability that the STA1 in the overlapping area competes to obtain the channel for communication Smaller, lower throughput.
  • the embodiments of the present invention provide a communication method, a station, and a system, to solve the problem that a STA in an overlapping area has a small probability of obtaining a channel and a low throughput in an OBSS system.
  • a first aspect of the embodiments of the present invention provides a communication method, which may include: The station performs association authentication with the access point, where the access point includes at least a first access point and a second access point;
  • the station broadcasts a communication message, so that the first access point and the second access point, after receiving the communication message, return a response message to the station in sequence according to the sequence number;
  • the station receives a response message returned by at least one of the first access point and the second access point, and performs data communication with at least one access point that returns a response message.
  • the station receives a response message returned by at least one of the first access point and the second access point, and at least one return response message Access points for data communication, including:
  • the station receives the response message returned by the first access point and the second access point, and selects an access point with good channel quality for data communication according to the channel quality when the information is exchanged.
  • the first access point and the second access point return a response when receiving the communication message And the receiving, by the station, the response message sent by the first access point or the second access point, and performing data communication with the first access point or the second access point, including:
  • the station When receiving the response message returned by the first access point in the first preset time, the station does not wait for the second access point to return a response message, and directly performs data communication with the first access point. And if the station does not receive the response message returned by the first access point within the first preset time, continuing to wait for the second access point to return a response message; or
  • the station When the station receives the response message returned by the first access point in the first preset time, the station broadcasts an acknowledgement message indicating that the response message has been obtained, so that the second access point receives the response message. After the confirmation message, the response message is no longer returned, and the station performs data communication with the first access point.
  • a third possible implementation if only the first access point receives the communication message, the response message is returned, when the site is When the response message returned by the first access point is not received in the first preset time, a request message for requesting a return response message is broadcasted, so that the second access point receives the request message. Return later Reply message.
  • the station receives the first access point and the second access point returned
  • the response message according to the channel quality when the information is exchanged, selects an access point with good channel quality for information communication when the information is exchanged, including:
  • the first access point and the second access point return a response message when receiving the communication message
  • the first access point and the second interface are received at the station.
  • the response message is returned in order, according to the channel quality when the information is exchanged, the access point with good channel quality when the information is exchanged is selected for data communication; or
  • the broadcast is used to request a return response message. And requesting the message, so that the second access point returns a response message after receiving the request message, and the station selects an access point with good channel quality for data communication according to the channel quality when the information is exchanged.
  • the communication message is a data message, where the data message is Carrying the data of the communication, the response message is a confirmation character;
  • the communication message is a request to send a message RTS
  • the response message is a permission to send a message CTS
  • the request to send message RTS is used by the station to send data to the access point
  • the permission to send message CTS is used for The access point allows the station to send data.
  • the station receives the first access point And a response message returned by the at least one access point of the second access point, and data communication with the access point of the at least one return response message, including:
  • the station if the first access If the point and the second access point work on the same channel, the station broadcasts the communication message on the channel; if the first access point and the second access point work on different channels, then The station broadcasts the communication message on a channel working at the first access point, and when the communication with the first access point fails, the station changes to a channel working by the second access point and broadcasts The communication message.
  • the Before at least one access point that returns a response message performs data communication it also includes:
  • the access point that has established a communication connection includes an access point that has been in data communication with the station or an access point that has not communicated with the station but has been determined by the station to perform data communication.
  • the communication setting message includes at least one of the following information: communication time information, window length information.
  • a second aspect of the embodiments of the present invention provides a site, which may include:
  • An association unit configured to perform association authentication with an access point, where the access point includes at least a first access point and a second access point;
  • a sending unit configured to send a sequence number to the first access point and the second access point, where the sequence number is used to indicate an order in which each access point answers the site;
  • a message broadcast unit configured to broadcast a communication message, so that the first access point and the second access point, after receiving the communication message, return a response message to the station in sequence according to the sequence number;
  • a receiving unit configured to receive a response message returned by the at least one access point of the first access point and the second access point, and perform data communication with at least one access point that returns a response message.
  • the receiving unit is specifically configured to: receive a response message returned by the first access point or the second access point, and the first access Point or the second access point for data communication; or
  • the first access point and the second access point both return a response message when receiving the communication message, and the receiving unit is specifically configured to:
  • the receiving unit does not receive the response message returned by the first access point in the first preset time, and continues to wait for the second access point to return a response message;
  • the first access point if only the first access point receives the communication message, it returns a response message when the receiving unit Not receiving the response message returned by the first access point in the first preset time, instructing the message broadcast unit to broadcast a request message for requesting a return response message, so that the second access point A response message is returned after receiving the request message.
  • the receiving unit is specifically configured to:
  • the access point with good channel quality when the information is exchanged is selected for data communication;
  • the receiving unit receives the response message returned by the first access point, instructing the message broadcast unit to broadcast a request message for requesting a return response message, so that the second access point returns a response message after receiving the request message, and the receiving unit selects the channel quality according to the channel quality when the information is exchanged.
  • the access point performs data communication.
  • the communication message is a data message, where the data message is Carrying the data of the communication, the response message is a confirmation character;
  • the communication message is a request to send a message RTS
  • the response message is a message CTS that is allowed to be sent.
  • the request to send message RTS is used by the station to request sending data to the access point
  • the permission to send message CTS is used by the access point to allow the station to send data.
  • the receiving unit is specifically configured to:
  • the site further includes:
  • a channel switching unit configured to: if the first access point and the second access point work on the same channel, the message broadcast unit broadcasts the communication message on the channel; if the first access The point and the second access point work on different channels, and the message broadcast unit broadcasts the communication message on a channel working by the first access point, when communication with the first access point fails,
  • the channel switching unit changes to a channel in which the second access point operates and instructs the message broadcast unit to broadcast the communication message.
  • the receiving unit The method is further configured to: receive a communication setting message sent by an access point that has established a communication connection, and communicate with an access point that has established a communication connection according to the communication setting message;
  • the access point that has established a communication connection includes an access point that has been in data communication with the station or an access point that has not communicated with the station but has been determined by the station to perform data communication.
  • the communication setting message includes at least one of the following information: communication time information, window length information.
  • a third aspect of the embodiments of the present invention provides a computer program product, which may include a computer readable medium, the computer readable medium comprising a set of program code for performing the first aspect or the first aspect of the embodiment of the present invention.
  • a computer program product may include a computer readable medium, the computer readable medium comprising a set of program code for performing the first aspect or the first aspect of the embodiment of the present invention.
  • a fourth aspect of the embodiments of the present invention provides a system, which may include:
  • At least two access points for performing association authentication with the site and receiving a pair sent by the site
  • the serial number of the sequence is used to indicate the order in which each access point answers the site.
  • the response message is returned to the site in sequence according to the sequence number.
  • the station receives the response message returned by the at least one access point and performs data communication with the at least one access point that returns the response message.
  • the station if the station establishes a communication connection with any one of the at least two access points, the communication connection with the station is established.
  • the point is further configured to send a communication setup message to the site, so that the station performs data communication with the access point of the established communication connection according to the communication setup message;
  • the access point that has established a communication connection includes an access point that has been in data communication with the station or an access point that has not communicated with the station but has been determined by the station to perform data communication.
  • the communication setting message includes at least one of the following information: communication time information, window length information.
  • each access point by assigning a serial number to the access point, each access point responds to the communication message of the site in order, so that the station located in the overlapping area of the adjacent BSS can make an attempt to communicate with multiple access points. That is, the station can compete for channels in two BSSs at the same time, thereby increasing the probability that the station will compete for the channel and send data, which is beneficial to improving the throughput of the station.
  • Figure 1 is a schematic diagram of a scenario of an OBSS system
  • FIG. 2 is a schematic flowchart of a first embodiment of a communication method according to the present invention.
  • FIG. 3 is a schematic flowchart of a second embodiment of a communication method according to the present invention.
  • FIG. 4 is a schematic flowchart diagram of a third embodiment of a communication method according to the present invention.
  • FIG. 5 is a schematic flowchart diagram of a fourth embodiment of a communication method according to the present invention.
  • FIG. 6 is a schematic flowchart of a fifth embodiment of a communication method according to the present invention.
  • FIG. 7 is a schematic flowchart diagram of a sixth embodiment of a communication method according to the present invention
  • FIG. 8 is a schematic flowchart diagram of a seventh embodiment of a communication method according to the present invention.
  • FIG. 9 is a schematic flowchart diagram of an eighth embodiment of a communication method according to the present invention.
  • FIG. 10 is a schematic flowchart diagram of a ninth embodiment of a communication method according to the present invention.
  • FIG. 11 is a schematic flowchart of a tenth embodiment of a communication method according to the present invention.
  • FIG. 12 is a schematic flowchart diagram of an eleventh embodiment of a communication method according to the present invention.
  • FIG. 13 is a schematic flowchart diagram of a twelfth embodiment of a communication method according to the present invention.
  • Figure 14 is a schematic diagram showing the composition of a first embodiment of the station of the present invention.
  • Figure 15 is a schematic diagram showing the composition of a second embodiment of the station of the present invention.
  • Figure 16 is a schematic diagram showing the composition of a third embodiment of the station of the present invention.
  • FIG. 17 is a schematic diagram of the composition of a system according to an embodiment of the present invention. detailed description
  • FIG. 2 it is a schematic flowchart of a first embodiment of a communication method according to the present invention.
  • the method includes the following steps:
  • the access point includes at least a first access point and a second access point.
  • the station can obtain the access point information located in the working area of the site by scanning the channel.
  • the first access point and the second access point may work on the same channel or on different channels.
  • the scan here can be initiated by the site, or the site can receive the access point's request to passively start scanning the channel. This embodiment does not impose any limitation.
  • the station sends a sequence number to the first access point and the second access point, where the sequence number is used to indicate an order in which each access point answers the site.
  • the sequence number is used to indicate the order in which each access point answers the site.
  • the serial number can be sent to the two access points.
  • the serial numbers that each access point can obtain are generally different.
  • the station broadcasts a communication message, so that after receiving the communication message, the first access point and the second access point return a response message to the station in sequence according to the sequence number.
  • the communication message is a data message, where the data message carries communication data, and the response message is an acknowledgement character ACK; or
  • the communication message is a request to send a message RTS
  • the response message is a permission to send a message CTS
  • the request to send message RTS is used by the station to send data to the access point
  • the permission to send message CTS is used for The access point allows the station to send data.
  • the communication message may carry data, and the station directly attempts to perform data communication with the access point, for example, directly broadcasting the data message and waiting for the access point to return an acknowledgement character ACK, according to the returned ACK, to determine whether or not an access point
  • the communication succeeds; of course, the data may not be carried.
  • the message carrying the data is sent, for example, a broadcast request message (Request To Send, called RTS) and waiting for the return to allow the message to be sent (Clear To Send)
  • RTS broadcast request To Send
  • CTS Call To Send
  • the access point of the communication can be determined, and then the data message can be sent.
  • the station receives a response message returned by at least one of the first access point and the second access point, and performs data communication with at least one access point that returns a response message.
  • the station may establish a communication connection with the access point when receiving a response message returned by any one access point, or may wait for more than one or all associated access points to return a response message, and then according to the communication.
  • the channel quality reflected in the transmission and reception of the message or response message selects the access point with better channel quality for communication. Thereby reducing interference and improving communication quality.
  • the station can also perform data communication simultaneously with two or more access points that return a reply message.
  • the station allocates a corresponding sequence number to any associated access point, and is used to indicate the order in which each access point answers the site. For example, if the sequence number of the first access point is 1, and the sequence number of the second access point is 2, when the two receive the communication message of the site, the response message will be returned by the first access point in sequence. Then, the second access point returns a response message.
  • each access point responds to the communication message of the station in order, so that the station located in the overlapping area of the adjacent BSS can communicate with multiple access points. Try to connect, that is, the station can compete for channels in both BSSs at the same time, thus improving the site competition to the channel. And the probability of sending data is beneficial to improve the throughput of the site, and can reduce the interference received by the stations in the overlapping area.
  • the BSS in this embodiment may be based on the infrastructure mode Infrastructure or may be based on the peer-to-peer mode ad-hoc.
  • the station can compete for channels in both modes of the network at the same time.
  • the basic service set identifier (Basic Service Set IDentity, BSSID) of the BSS where these access points are located may be the same or different.
  • BSSID Basic Service Set IDentity
  • the data frame sent by the station or the corresponding bit of the medium access control layer (Mdium Access Control) in the RTS can be set to the BSSID.
  • the BSSIDs are different, if these access points work on the same channel, the data frame sent by the station or the corresponding bit of the MAC frame header in the RTS can be set to a wildcard.
  • the station can negotiate the duration of multiple access point communication with multiple access points before communicating with multiple access points.
  • Communication with multiple access points can be temporary or long-term.
  • the negotiated information can be a new command or included in an existing control frame, management frame, or data frame, such as an associated request frame and a reassociation request frame.
  • FIG. 3 it is a schematic flowchart of a second embodiment of a communication method according to the present invention.
  • the method includes the following steps:
  • the site and the access point perform association authentication.
  • the access point includes at least a first access point and a second access point.
  • the station sends a sequence number to the first access point and the second access point, where the sequence number is used to indicate an order in which each access point answers the site.
  • the station broadcasts a communication message, so that the first access point and the second access point, after receiving the communication message, return a response message to the station in sequence according to the sequence number.
  • the station receives a response message returned by the first access point or the second access point, and performs data communication with the first access point or the second access point.
  • the station will first receive the response message returned by the first access point. .
  • the site does not wait for the second access point to return a response message when receiving the response message returned by the first access point within the first preset time, directly with the first An access point performs data communication; if the station does not receive the response message returned by the first access point within the first preset time, continuing to wait for the second access point to return a response message, And if the station receives the response message returned by the second access point in the second preset time, performing data communication with the second access point; if the station is in the second preset time If the response message returned by the second access point is not received, the communication failure is determined; or
  • the station When the station receives the response message returned by the first access point in the first preset time, the station broadcasts an acknowledgement message indicating that the response message has been obtained, so that the second access point receives the response message. After the confirmation message, the response message is no longer returned, and the station performs data communication with the first access point.
  • the first access point If only the first access point receives the communication message, it returns a response message, and when the station does not receive the response returned by the first access point within the first preset time, At the time of the message, a request message for requesting a return response message is broadcasted, so that the second access point returns a response message after receiving the request message.
  • the station receives the response message returned by the second access point in the second preset time, performing data communication with the second access point; if the station is in the second preset time If the response message returned by the second access point is not received, the communication failure is determined.
  • the station broadcasts the communication message on the channel; if the first access point and the The second access point operates on a different channel, and the station broadcasts the communication message on a channel working at the first access point, and when the communication with the first access point fails, the site is changed to The channel operated by the second access point and broadcasting the communication message.
  • a process for successfully receiving a return message of any access point and performing data communication is mainly described. Since there is no need to wait for other access points to return a response message, the communication method described in this embodiment may be faster.
  • the access point for determining communication improves the efficiency of data communication.
  • FIG. 4 it is a schematic flowchart of a third embodiment of a communication method according to the present invention.
  • the method includes the following steps:
  • the site performs association authentication with the access point.
  • the access point includes at least a first access point and a second access point.
  • S402 The station sends a sequence number to the first access point and the second access point, where the sequence number is used to indicate an order in which each access point answers the site.
  • the station broadcasts a communication message, so that the first access point and the second access point, after receiving the communication message, return a response message to the station in sequence according to the sequence number.
  • S404 The station receives the response message returned by the first access point and the second access point, and selects an access point with good channel quality for data communication according to channel quality when the information is exchanged.
  • the method may include: if the first access point and the second access point return a response message when receiving the communication message, receiving the first access point at the station And when the second access point returns the response message in sequence, according to the channel quality when the information is exchanged, the access point with good channel quality when the information is exchanged is selected for data communication; or
  • the access point on the access point is used to reduce the overall power consumption of the system and reduce the waiting time of the site, the access point that only obtains the sequence number of all the access points in the first access point will return a response message.
  • the first access point returns a response message when receiving the communication message, and broadcasts a request message for requesting a return response message when the site receives the response message returned by the first access point.
  • the second access point returns a response message after receiving the request message, and the station selects an access point with good channel quality for data communication according to the channel quality when the information is exchanged.
  • a method for selecting an access point for communication according to a response message returned by a plurality of even all access points is given.
  • the station may interact according to information.
  • the channel quality selects the access point with better channel quality for communication, which is beneficial to improve the communication quality of the selected access point.
  • the second embodiment and the third embodiment adopt different implementation manners for improving the overall working efficiency of the site.
  • the appropriate selection may be made according to actual conditions, such as the number of access points. If the number of access points is small, you can wait for multiple access points to return a response message and then select the access point with better channel quality for communication. If the number of access points is large, you can receive any access. When the response message is returned, the access point is determined to be the access point of the communication and data communication is performed.
  • FIG. 5 it is a schematic flowchart of a fourth embodiment of a communication method according to the present invention.
  • the method includes the following steps:
  • the site and the access point perform association authentication.
  • the access point includes at least a first access point and a second access point.
  • S502 The station sends a sequence number to the first access point and the second access point, where the sequence number is used to indicate an order in which each access point answers the site.
  • the station broadcasts a communication message, so that the first access point and the second access point, after receiving the communication message, return a response message to the station in sequence according to the sequence number.
  • S504 The station receives a response message returned by at least one of the first access point and the second access point, and establishes a communication connection with at least one access point that returns a response message.
  • the station receives a communication setup message sent by an access point that has established a communication connection, and communicates with the access point that has established the communication connection according to the communication setup message.
  • the access point that has established a communication connection includes an access point that has been in data communication with the station or an access point that has not communicated with the station but has been determined by the station to perform data communication.
  • the communication setting message includes at least one of the following information: communication time information, window length information.
  • the access point associated with the same site is to send downlink data to the site
  • multiple access points may transmit in a competitive manner. You can avoid conflicts between multiple access points communicating with the same site by setting different communications and window lengths.
  • the corresponding parameter information can be advertised with a new command or carried in an existing data frame, management frame or control frame. And during the communication time indicated by the communication time information, the station can perform any continuous or intermittent communication with the access point that has established the communication connection.
  • FIG. 6 to FIG. 10 are schematic flowcharts of the fifth to ninth embodiments of the communication method according to the present invention.
  • the first access point and the second access point receive the communication of the site.
  • the message will return a reply message.
  • Figure 6 shows that the first access point and the second access point receive the communication of the site.
  • the message will return a reply message.
  • the station broadcasts a communication message, and after the first access point returns a response message, the station can perform data communication with the first access point.
  • the communication message here may be a data message carrying data, or may be an RTS.
  • the response message may be an ACK or a CTS.
  • the station can wait for the second access.
  • the point returns a reply message and performs data communication with the second access point.
  • the station can select an access point with good channel quality for data communication according to the channel quality when the information is exchanged.
  • the station determines that the communication failed. Of course, if there is still a third access point, the station may continue to wait for the third access point to return a response message.
  • the broadcast is used for broadcasting.
  • the acknowledgement message indicating that the response message has been obtained, so that after the second access point receives the acknowledgement message, the second access point does not return the response message to the site, and the station can perform data communication with the first access point, so that when the number of access points is large, Multiple access points can be avoided to return a response message, thereby reducing signaling overhead and saving signaling and channel resources.
  • the acknowledgment message may carry the identifier of the first access point so that other access points can understand the access point that performs data communication with the station.
  • FIG. 11 to FIG. 12 are schematic flowcharts of the tenth and eleventh embodiments of the communication method of the present invention.
  • the first access point and the second access point receive the site. Communication messages Only the first access point will actively return a reply message. As shown in Figure 11:
  • the station broadcasts the communication message, and the first access point fails to return the response message. At this time, the station may broadcast a request message for returning the response message, so that the second access point returns a response message, thereby performing data communication with the second access point.
  • the communication message here may be a data message carrying data, or may be an RTS.
  • the response message may be an ACK or a CTS.
  • the request message may carry the identifier of the first access point so that other access points know the access point that does not return the response message.
  • the first access point may return a response message, or may not return, and is not limited herein.
  • the request message for requesting the return response message may be broadcast, and the second access point returns a response.
  • FIG. 13 is a schematic flowchart of a twelfth embodiment of a communication method according to the present invention.
  • the method includes the following steps:
  • the first access point and the second access point return the CTS in the order corresponding to the sequence number.
  • the station selects the first access point for data communication according to the channel quality when the information is exchanged. (It is assumed that the channel quality is better when the site interacts with the first access point information at this time)
  • the station sends a data message to the first access point for data communication.
  • the data message carries data.
  • FIG. 14 is a schematic diagram of a composition of a first embodiment of a station according to the present invention.
  • the station includes: an association unit 100, a sending unit 200, a message broadcast unit 300, and a receiving unit 400.
  • the association unit 100 is configured to perform association authentication with the access point.
  • the access point includes at least a first access point and a second access point.
  • the sending unit 200 is configured to send a sequence number to the first access point and the second access point, where the sequence number is used to indicate an order in which each access point answers the site;
  • the message broadcast unit 300 is configured to broadcast a communication message, so that the first access point and the second access point return a response message to the site in sequence according to the sequence number after receiving the communication message. ;
  • the receiving unit 400 is configured to receive a response message returned by the at least one access point of the first access point and the second access point, and perform data communication with at least one access point that returns a response message.
  • the receiving unit 400 is specifically configured to:
  • the receiving unit 400 is specifically configured to:
  • the response message is returned, and the response message returned by the first access point is received within the first preset time. And not waiting for the second access point to return a response message, directly performing data communication with the first access point; if the receiving unit does not receive the first connection within the first preset time The response message returned by the ingress continues to wait for the second access point to return a response message; or
  • the first access point If only the first access point receives the communication message, it returns a response message, and when the receiving unit 400 does not receive the response returned by the first access point within the first preset time At the time of the message, the message broadcast unit 300 is instructed to broadcast a request message for requesting a return response message, so that the second access point returns a response message after receiving the request message.
  • the receiving unit 400 is specifically configured to:
  • the receiving unit 400 receives the first access point and the first When the two access points return the response messages in sequence, according to the channel quality when the information is exchanged, the access point with good channel quality when the information is exchanged is selected for data communication; or
  • the message broadcast unit 300 is instructed. Broadcasting a request message for requesting a return response message, so that the second access point returns a response message after receiving the request message, and the receiving unit 400 selects a channel when the information is exchanged according to the channel quality when the information is exchanged. Good quality access points for data communication.
  • the communication message is a data message, where the data message carries communication data, and the response message is a confirmation character; or
  • the communication message is a request to send a message RTS
  • the response message is a permission to send a message CTS
  • the request to send message RTS is used by the station to request to send data to the access point, the permission Sending a message CTS for the access point allows the station to send data.
  • the receiving unit 400 is specifically configured to:
  • the receiving unit 300 is further configured to:
  • the communication setting message includes at least one of the following information: communication time information, window length information.
  • the station includes: an association unit 100, a sending unit 200, a message broadcast unit 300, a receiving unit 400, and a channel switching unit 500. .
  • the association unit 100 is configured to perform association authentication with the access point.
  • the access point includes at least a first access point and a second access point.
  • the sending unit 200 is configured to send a sequence number to the first access point and the second access point, where the sequence number is used to indicate an order in which each access point answers the site;
  • the message broadcast unit 300 is configured to broadcast a communication message, so that the first access point and the second access point return a response message to the site in sequence according to the sequence number after receiving the communication message. ;
  • the receiving unit 400 is configured to receive a response message returned by the at least one access point of the first access point and the second access point, and perform data communication with at least one access point that returns a response message.
  • the channel switching unit 500 is configured to: if the first access point and the second access point work on the same channel, the message broadcast unit 300 broadcasts the communication message on the channel; The access point and the second access point operate on different channels, and the message broadcast unit 300 broadcasts the communication message on a channel working by the first access point, when communicating with the first access point. Upon failure, the channel switching unit 500 replaces the channel to which the second access point operates and indicates the message broadcast list Element 300 broadcasts the communication message.
  • association unit may be formed by the association sub-unit and the authentication sub-unit, or may exist independently
  • receiving unit may be formed by the collection sub-unit and the communication sub-unit, or may exist independently
  • association unit and/or the receiving unit in the above site embodiment may be separately set in hardware form independently of the processor of the site, and the setting form may be in the form of a microprocessor; or may be embedded in the processor of the site in hardware form.
  • the program may also be stored in the memory of the site in software, so that the processor of the site invokes the operation corresponding to the above associated unit or the receiving unit.
  • the associating unit 100 and/or the receiving unit 400 may be the processor of the station, and the functions of the transmitting unit 200 and the message broadcasting unit 300 may be Embedded in the processor.
  • the channel switching unit 500 and the association unit 100 or the receiving unit 400 shown in FIG. 15 may be separately provided independently of the processor, may be embedded in the processor, or may be stored in the memory in the form of software.
  • the call implements its functionality.
  • the sending unit 200 and the message broadcast unit 300 may be integrated or set independently, and the sending unit 200 and the message broadcasting unit 300 may be used as an interface circuit of the station, or may be integrated with the association unit 100, the receiving unit 400 or the channel switching unit 500. , can also be set independently.
  • the embodiment of the invention does not impose any limitation.
  • the above processor may be a central processing unit (CPU), a microprocessor, a single chip microcomputer or the like.
  • FIG. 16 it is a schematic diagram of a composition of a third embodiment of a station according to the present invention.
  • the station includes: an interface circuit 110 , a memory 120 , and a processor connected to the interface circuit 110 and the memory 120 . 130.
  • the memory 120 is for storing a set of program codes
  • the processor 130 is configured to call the program code stored in the memory 120 to perform the operations described in any one of the first to twelfth embodiments of the communication method of the present invention.
  • FIG. 17 a schematic structural diagram of a system according to an embodiment of the present invention is provided.
  • the system includes:
  • the first access point 150 and the second access point 160 are The first access point 150 and the second access point 160.
  • the first access point 150 and the second access point 160 are configured to perform association authentication with the site 140, and receive a corresponding sequence number sent by the site 140, where the sequence number is used to indicate that each access point responds.
  • the sequence of the stations when receiving the communication message broadcast by the station 140, returns a response message to the station 140 in order according to the sequence number, so that the station 140 receives at least one access point.
  • the returned response message is in data communication with at least one access point that returns a reply message. If the station 140 establishes a communication connection with any of the at least two access points, the access point that has established a communication connection with the station 140 is further configured to send a communication setup message to the site. 140, so that the station 140 performs data communication with the access point of the established communication connection according to the communication setting message;
  • the access point that has established a communication connection includes an access point that has been in data communication with the station 140 or a data communication that is not in communication with the station 140 but has been determined by the station 140 to perform data communication.
  • the communication setting message includes at least one of the following information: communication time information, window length information.
  • the present invention has the following advantages:
  • each access point by assigning a serial number to the access point, each access point responds to the communication message of the site in order, so that the station located in the overlapping area of the adjacent BSS can make an attempt to communicate with multiple access points. That is, the station can compete for channels in two BSSs at the same time, thereby increasing the probability that the station will compete for the channel and send data, which is beneficial to improving the throughput of the station.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing 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.

Abstract

本发明实施例公开了一种通信方法,包括:站点与接入点进行关联认证,所述接入点至少包括第一接入点和第二接入点;所述站点发送序列号到所述第一接入点和所述第二接入点,所述序列号用于指示各个接入点应答所述站点的顺序;所述站点广播通信消息,以便所述第一接入点和所述第二接入点在接收到所述通信消息后,根据所述序列号按顺序返回应答消息给所述站点;所述站点接收所述第一接入点和所述第二接入点中至少一个接入点返回的应答消息,与至少一个返回应答消息的接入点进行数据通信。本发明实施例还公开了一种站点及系统。采用本发明,可解决 OBSS 系统中,处于交叠区域的 STA 竞争得到信道的概率较小、吞吐量较低的问题。

Description

一种通信方法、 站点及系统
技术领域
本发明涉及通信技术领域, 尤其涉及一种通信方法、 站点及系统。 背景技术
随着无线通信技术的迅猛发展, 无线设备如接入点 (Access Point, 筒称 AP )和站点 (Station, 筒称 STA ) 的部署也越来越多, 在密集部署的无线局 域网中, 由于连续布网的需要, 相邻的基本服务集(Basic Service Set, 筒称 BSS )之间可能会存在信号交叠的区域。 由于频谱资源是有限的, 这些相邻的 BSS有可能工作在相同的信道上, 从而导致相邻的 BSS 形成交叠基本服务集 ( Overlapped Basic Service Set,筒称 OBSS )。处于相邻的 BSS交叠区域的 STA, 其在通信时将会受到感知范围内的多个 BSS的影响, 相对于处于非交叠区域 的 STA, 其竟争到信道的概率较低, 导致处于交叠区域的 STA吞吐量较低, 甚至在与 AP通信时信息交互可能失败。
在现有技术中, 针对 OBSS系统中处于交叠区域的 STA可以同时接收到 来自多个 AP信号的特性, 允许该 STA与多于一个的 AP进行管理和通信, 具 体可通过与多个 AP关联并且在不同 BSS间设定不同的睡眠时间进行轮流唤醒 , 从而实现与不同 AP的时分通信。如图 1所示, STA1处于相邻的 BSS1和 BSS2 的交叠区域, STA2仅处于 BSS2的覆盖区域, 因此 STA1可以同时接收到来 自与 BSS1对应的 API的信号以及来自于 BSS2对应的 AP2的信号。在 OBSS 系统中, 处于交叠区域的 STA1在 BSS1中唤醒, 当 BSS2与 STA2进行信息 交互时, 此时 STA1竟争到信道的概率仍等同于单独在 BSS1中竟争到信道的 概率。且只要与 BSS1对应 API或与 BSS2对应的 AP2任意一个 AP在发送信 息给其他 STA时, 处于交叠区域的 STA1都不能竟争信道, 因此处于交叠区 域的 STA1竟争得到信道进行通信的概率较小, 吞吐量较低。 发明内容
本发明实施例提供了一种通信方法、 站点及系统, 以解决 OBSS系统中, 处于交叠区域的 STA竟争得到信道的概率较小、 吞吐量较低的问题。
本发明实施例第一方面提供了一种通信方法, 可包括: 站点与接入点进行关联认证,所述接入点至少包括第一接入点和第二接入 点;
所述站点发送序列号到所述第一接入点和所述第二接入点,所述序列号用 于指示各个接入点应答所述站点的顺序;
所述站点广播通信消息,以便所述第一接入点和所述第二接入点在接收到 所述通信消息后, 根据所述序列号按顺序返回应答消息给所述站点;
所述站点接收所述第一接入点和所述第二接入点中至少一个接入点返回 的应答消息, 与至少一个返回应答消息的接入点进行数据通信。
在第一方面的第一种可能的实现方式中,所述站点接收所述第一接入点和 所述第二接入点中至少一个接入点返回的应答消息,与至少一个返回应答消息 的接入点进行数据通信, 包括:
所述站点接收所述第一接入点或所述第二接入点返回的应答消息,与所述 第一接入点或所述第二接入点进行数据通信; 或
所述站点接收所述第一接入点和所述第二接入点返回的应答消息,根据信 息交互时的信道质量, 选择信息交互时信道质量好的接入点进行数据通信。
结合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 述第一接入点和所述第二接入点在接收到所述通信消息时均会返回应答消息, 所述站点接收所述第一接入点或所述第二接入点返回的应答消息,与所述第一 接入点或所述第二接入点进行数据通信, 包括:
所述站点在第一预设时间内接收到所述第一接入点返回的应答消息时,不 等待所述第二接入点返回应答消息, 直接与所述第一接入点进行数据通信; 若 所述站点在所述第一预设时间内未接收到所述第一接入点返回的应答消息,则 继续等待所述第二接入点返回应答消息; 或
所述站点在所述第一预设时间内接收到所述第一接入点返回的应答消息 时, 广播用于表明已获取应答消息的确认消息, 以便所述第二接入点在接收到 所述确认消息后不再返回应答消息,所述站点与所述第一接入点进行数据通信。
结合第一方面的第二种可能的实现方式,在第三种可能的实现方式中, 若 仅所述第一接入点在接收到所述通信消息时会返回应答消息,当所述站点在所 述第一预设时间内未接收到所述第一接入点返回的应答消息时,广播用于请求 返回应答消息的请求消息,以便所述第二接入点在接收到所述请求消息后返回 应答消息。
结合第一方面的第一或第二或第三种可能的实现方式,在第四种可能的实 现方式中, 所述站点接收所述第一接入点和所述第二接入点返回的应答消息, 根据信息交互时的信道质量,选择信息交互时信道质量好的接入点进行数据通 信, 包括:
若所述第一接入点和所述第二接入点在接收到所述通信消息时均会返回 应答消息,则在所述站点接收到所述第一接入点和所述第二接入点按顺序返回 的应答消息时,根据信息交互时的信道质量,选择信息交互时信道质量好的接 入点进行数据通信; 或
若仅所述第一接入点在接收到所述通信消息时会返回应答消息,则在所述 站点接收到所述第一接入点返回的应答消息时,广播用于请求返回应答消息的 请求消息, 以便所述第二接入点在接收到所述请求消息后返回应答消息, 所述 站点根据信息交互时的信道质量,选择信息交互时信道质量好的接入点进行数 据通信。
结合第一方面或结合第一方面的第一或第二或第三或第四种可能的实现 方式, 在第五种可能的实现方式中, 所述通信消息为数据消息, 所述数据消息 中携带通信的数据, 所述应答消息为确认字符; 或
所述通信消息为请求发送消息 RTS, 所述应答消息为允许发送消息 CTS, 所述请求发送消息 RTS用于所述站点向所述接入点请求发送数据, 所述允许 发送消息 CTS用于所述接入点允许所述站点发送数据。
结合第一方面的第五种可能的实现方式,在第六种可能的实现方式中, 若 所述通信消息为 RTS ,所述应答消息为 CTS ,则所述站点接收所述第一接入点 和所述第二接入点中至少一个接入点返回的应答消息,与至少一个返回应答消 息的接入点进行数据通信, 包括:
所述站点接收所述第一接入点和所述第二接入点中至少一个接入点返回 的 CTS;
根据所述第一接入点和所述第二接入点中至少一个接入点返回的 CTS,确 定进行数据通信的接入点;
发送数据消息至所述确定通信的接入点,与所述确定通信的接入点进行数 据通信, 其中, 所述数据消息中携带通信的数据。 结合第一方面或结合第一方面的第一或第二或第三或第四或第五或第六 种可能的实现方式,在第七种可能的实现方式中, 若所述第一接入点和所述第 二接入点工作在同一信道, 则所述站点在所述信道广播所述通信消息; 若所述 第一接入点和所述第二接入点工作在不同信道,则所述站点在所述第一接入点 工作的信道广播所述通信消息, 当与所述第一接入点通信失败时, 所述站点更 换至所述第二接入点工作的信道并广播所述通信消息。
结合第一方面或结合第一方面的第一或第二或第三或第四或第五或第六 或第七种可能的实现方式,在第八种可能的实现方式中, 所述站点与至少一个 返回应答消息的接入点进行数据通信之前, 还包括:
所述站点接收已建立通信连接的接入点发送的通信设置消息,根据所述通 信设置消息与所述已建立通信连接的接入点进行通信;
其中,所述已建立通信连接的接入点包括已与所述站点进行数据通信的接 入点或未与所述站点进行数据通信但已被所述站点确定为进行数据通信的接 入点, 所述通信设置消息包括以下信息中的至少一种: 通信时间信息、 窗口长 度信息。
本发明实施例第二方面提供了一种站点, 可包括:
关联单元, 用于与接入点进行关联认证, 所述接入点至少包括第一接入点 和第二接入点;;
发送单元, 用于发送序列号到所述第一接入点和所述第二接入点, 所述序 列号用于指示各个接入点应答所述站点的顺序;
消息广播单元, 用于广播通信消息, 以便所述第一接入点和所述第二接入 点在接收到所述通信消息后,根据所述序列号按顺序返回应答消息给所述站点; 接收单元,用于接收所述第一接入点和所述第二接入点中至少一个接入点 返回的应答消息, 与至少一个返回应答消息的接入点进行数据通信。
在第二方面的第一种可能的实现方式中, 所述接收单元具体用于: 接收所述第一接入点或所述第二接入点返回的应答消息,与所述第一接入 点或所述第二接入点进行数据通信; 或
接收所述第一接入点和所述第二接入点返回的应答消息,根据信息交互时 的信道质量, 选择信息交互时信道质量好的接入点进行数据通信。
结合第二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, 若 所述第一接入点和所述第二接入点在接收到所述通信消息时均会返回应答消 息, 所述接收单元具体用于:
在第一预设时间内接收到所述第一接入点返回的应答消息时,不等待所述 第二接入点返回应答消息, 直接与所述第一接入点进行数据通信; 若所述接收 单元在所述第一预设时间内未接收到所述第一接入点返回的应答消息,则继续 等待所述第二接入点返回应答消息; 或
在所述第一预设时间内接收到所述第一接入点返回的应答消息时,指示所 述消息广播单元广播用于表明已获取应答消息的确认消息,以便所述第二接入 点在接收到所述确认消息后不再返回应答消息,所述接收单元与所述第一接入 点进行数据通信。
结合第二方面的第二种可能的实现方式,在第三种可能的实现方式中, 若 仅所述第一接入点在接收到所述通信消息时会返回应答消息,当所述接收单元 在所述第一预设时间内未接收到所述第一接入点返回的应答消息时,指示所述 消息广播单元广播用于请求返回应答消息的请求消息,以便所述第二接入点在 接收到所述请求消息后返回应答消息。
结合第二方面的第一或第二或第三种可能的实现方式,在第四种可能的实 现方式中, 所述接收单元具体用于:
若所述第一接入点和所述第二接入点在接收到所述通信消息时均会返回 应答消息,则在所述接收单元接收到所述第一接入点和所述第二接入点按顺序 返回的应答消息时,根据信息交互时的信道质量,选择信息交互时信道质量好 的接入点进行数据通信; 或
若仅所述第一接入点在接收到所述通信消息时会返回应答消息,则在所述 接收单元接收到所述第一接入点返回的应答消息时,指示所述消息广播单元广 播用于请求返回应答消息的请求消息,以便所述第二接入点在接收到所述请求 消息后返回应答消息, 所述接收单元根据信息交互时的信道质量,选择选择信 息交互时信道质量好的接入点进行数据通信。
结合第二方面或结合第二方面的第一或第二或第三或第四种可能的实现 方式, 在第五种可能的实现方式中, 所述通信消息为数据消息, 所述数据消息 中携带通信的数据, 所述应答消息为确认字符; 或
所述通信消息为请求发送消息 RTS, 所述应答消息为允许发送消息 CTS, 所述请求发送消息 RTS用于所述站点向所述接入点请求发送数据, 所述允许 发送消息 CTS用于所述接入点允许所述站点发送数据。
结合第一方面的第五种可能的实现方式,在第六种可能的实现方式中, 若 所述通信消息为 RTS , 所述应答消息为 CTS, 则所述接收单元具体用于:
接收所述第一接入点和所述第二接入点中至少一个接入点返回的 CTS; 根据所述第一接入点和所述第二接入点中至少一个接入点返回的 CTS,确 定进行数据通信的接入点;
发送数据消息至所述确定通信的接入点,与所述确定通信的接入点进行数 据通信, 其中, 所述数据消息中携带通信的数据。
结合第二方面或结合第二方面的第一或第二或第三或第四或第五或第六 种可能的实现方式, 在第七种可能的实现方式中, 所述站点还包括:
信道切换单元,用于若所述第一接入点和所述第二接入点工作在同一信道, 则所述消息广播单元在所述信道广播所述通信消息;若所述第一接入点和所述 第二接入点工作在不同信道,则所述消息广播单元在所述第一接入点工作的信 道广播所述通信消息, 当与所述第一接入点通信失败时, 所述信道切换单元更 换至所述第二接入点工作的信道并指示所述消息广播单元广播所述通信消息。
结合第二方面或结合第二方面的第一或第二或第三或第四或第五或第六 或第七种可能的实现方式,在第八种可能的实现方式中,所述接收单元还用于: 接收已建立通信连接的接入点发送的通信设置消息,根据所述通信设置消 息与所述已建立通信连接的接入点进行通信;
其中,所述已建立通信连接的接入点包括已与所述站点进行数据通信的接 入点或未与所述站点进行数据通信但已被所述站点确定为进行数据通信的接 入点, 所述通信设置消息包括以下信息中的至少一种: 通信时间信息、 窗口长 度信息。
本发明实施例第三方面提供了一种计算机程序产品,可包括计算机可读介 质, 所述计算机可读介质包括一组程序代码, 用于执行如本发明实施例第一方 面或第一方面任一实现方式所述的方法。
本发明实施例第四方面提供了一种系统, 可包括:
如本发明实施例第二方面或第二方面任一实现方式所述的站点;
至少两个接入点,用于与所述站点进行关联认证,接收所述站点发送的对 应的序列号, 所述序列号用于指示各个接入点应答所述站点的顺序,在接收到 所述站点广播的通信消息时,根据所述序列号按顺序返回应答消息给所述站点 , 以便所述站点接收至少一个接入点返回的应答消息并与至少一个返回应答消 息的接入点进行数据通信。
在第四方面的第一种可能的实现方式中,若所述站点与所述至少两个接入 点中的任一接入点建立通信连接,则与所述站点已建立通信连接的接入点还用 于发送通信设置消息至所述站点,以便所述站点根据所述通信设置消息与所述 已建立通信连接的接入点进行数据通信;
其中,所述已建立通信连接的接入点包括已与所述站点进行数据通信的接 入点或未与所述站点进行数据通信但已被所述站点确定为进行数据通信的接 入点, 所述通信设置消息包括以下信息中的至少一种: 通信时间信息、 窗口长 度信息。
实施本发明实施例, 具有如下有益效果:
在 OBSS系统中,通过为接入点分配序列号使得各个接入点按顺序响应站 点的通信消息, 这样位于相邻 BSS 交叠区域的站点, 就可以与多个接入点进 行通信的尝试连接, 即该站点可以同时在两个 BSS 中竟争信道, 从而提高了 站点竟争到信道并发送数据的概率, 利于提升站点的吞吐量。 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 例中所需要使用的附图作筒单地介绍,显而易见地, 下面描述中的附图仅仅是 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的 前提下, 还可以根据这些附图获得其他的附图。
图 1 为 OBSS系统的场景示意图;
图 2为本发明通信方法的第一实施例的流程示意图;
图 3为本发明通信方法的第二实施例的流程示意图;
图 4为本发明通信方法的第三实施例的流程示意图;
图 5为本发明通信方法的第四实施例的流程示意图;
图 6为本发明通信方法的第五实施例的流程示意图;
图 7为本发明通信方法的第六实施例的流程示意图; 图 8为本发明通信方法的第七实施例的流程示意图;
图 9为本发明通信方法的第八实施例的流程示意图;
图 10为本发明通信方法的第九实施例的流程示意图;
图 11为本发明通信方法的第十实施例的流程示意图;
图 12为本发明通信方法的第十一实施例的流程示意图;
图 13为本发明通信方法的第十二实施例的流程示意图;
图 14为本发明站点的第一实施例的组成示意图;
图 15为本发明站点的第二实施例的组成示意图;
图 16为本发明站点的第三实施例的组成示意图;
图 17为本发明实施例系统的组成示意图。 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清 楚、 完整地描述, 显然, 所描述的实施例仅仅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作出创造 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。
请参照图 2, 为本发明通信方法的第一实施例的流程示意图, 在本实施例 中, 所述方法包括以下步骤:
S201 , 站点与接入点进行关联认证。
其中, 所述接入点至少包括第一接入点和第二接入点。
具体地, 站点可以通过扫描信道, 获取位于所述站点工作区域内的接入点 信息。所述第一接入点和所述第二接入点可以工作在相同的信道,也可以工作 在不同的信道。 此处的扫描可以由站点主动发起,也可以由站点接收接入点的 要求被动开始扫描信道。 本实施例不作任何限制。
S202,所述站点发送序列号到所述第一接入点和所述第二接入点,所述序 列号用于指示各个接入点应答所述站点的顺序。
其中, 所述序列号用于指示各个接入点应答所述站点的顺序。
例如, 若所述站点扫描信道时发现工作区域内存在两个接入点, 当所述站 点与这两个接入点进行了关联认证之后, 便可以发送序列号给这两个接入点。 每个接入点所能获得的序列号一般都不相同。
S203,所述站点广播通信消息, 以便所述第一接入点和所述第二接入点在 接收到所述通信消息后, 根据所述序列号按顺序返回应答消息给所述站点。
具体地, 所述通信消息为数据消息, 所述数据消息中携带通信的数据, 所 述应答消息为确认字符 ACK; 或
所述通信消息为请求发送消息 RTS, 所述应答消息为允许发送消息 CTS, 所述请求发送消息 RTS用于所述站点向所述接入点请求发送数据, 所述允许 发送消息 CTS用于所述接入点允许所述站点发送数据。
所述通信消息可以携带数据, 所述站点直接尝试与接入点进行数据通信, 例如直接广播数据消息并等待接入点返回确认字符 ACK,根据返回的 ACK即 可以确定是否和某一接入点通信成功; 当然也可以不携带数据, 等待确定通信 的接入点后,再发送携带数据的消息,例如广播请求发送消息( Request To Send, 筒称 RTS )并等待返回允许发送消息(Clear To Send, 筒称 CTS ), 根据返回 的 CTS即可以确定通信的接入点, 再发送数据消息即可。
S204,所述站点接收所述第一接入点和所述第二接入点中至少一个接入点 返回的应答消息, 与至少一个返回应答消息的接入点进行数据通信。
具体地, 所述站点可以在接收到任意一个接入点返回的应答消息时, 与该 接入点建立通信连接,也可以等待一个以上或关联认证的所有接入点返回应答 消息,再根据通信消息或应答消息发送和接收时体现的信道质量选择信道质量 较佳的接入点进行通信。 从而降低了干扰, 提高了通信质量。
当然,在一些特别的场景下, 所述站点还可以和返回应答消息的两个或以 上的接入点同时进行数据通信。
在本实施例中, 所述站点会为关联的任意接入点分配对应的序列号, 以用 于指示各个接入点应答所述站点的顺序。 例如, 第一接入点的序列号为 1 , 第 二接入点的序列号为 2, 则两者接收到所述站点的通信消息时, 将按照顺序依 次由第一接入点返回应答消息,再由第二接入点返回应答消息。这样,在 OBSS 系统中,通过为接入点分配序列号使得各个接入点按顺序响应站点的通信消息, 这样位于相邻 BSS 交叠区域的站点, 就可以与多个接入点进行通信的尝试连 接, 即该站点可以同时在两个 BSS 中竟争信道, 从而提高了站点竟争到信道 并发送数据的概率, 利于提升站点的吞吐量,且能降低处于交叠区域的站点通 信时受到的干扰。
需要说明的是,本实施例中的 BSS可以是基于基础架构模式 Infrastructure 的也可以是基于点对点模式 ad-hoc 的。 站点可以同时在这两种模式的网络中 竟争信道。 站点与多个接入点通信时, 这些接入点所在的 BSS 的基本服务集 标识符( Basic Service Set IDentity,筒称 BSSID )有可能一样或者不同。当 BSSID 相同时, 站点发送的数据帧或者 RTS 中的媒质接入控制层 (Mdium Access Control, 筒称 MAC )帧头相应位可以设置为该 BSSID。 当 BSSID不同时, 如 果这些接入点工作在同一信道上,站点发送的数据帧或者 RTS中的 MAC帧头 相应位可以设置为通配符。
此外, 站点在进行与多接入点通信之前, 可以与多个接入点间协商多接入 点通信的时长。 与多接入点通信可以是临时的, 也可以是长期的。 协商的信息 可以是一个新的命令或者包含在已有的控制帧、管理帧或数据帧中, 例如关联 请求帧和重关联请求帧。
在本实施例中仅描述了 OBSS 系统中处于交叠区域的站点与两个接入点 通信的流程,当存在 3个以上的接入点时,其通信的流程类似,此处不再赘述。
请参照图 3, 为本发明通信方法的第二实施例的流程示意图, 在本实施例 中, 所述方法包括以下步骤:
5301 , 站点与接入点进行关联认证。
其中, 所述接入点至少包括第一接入点和第二接入点。
5302,所述站点发送序列号到所述第一接入点和所述第二接入点,所述序 列号用于指示各个接入点应答所述站点的顺序。
5303,所述站点广播通信消息, 以便所述第一接入点和所述第二接入点在 接收到所述通信消息后, 根据所述序列号按顺序返回应答消息给所述站点。
S304, 所述站点接收所述第一接入点或所述第二接入点返回的应答消息, 与所述第一接入点或所述第二接入点进行数据通信。
具体地,若所述第一接入点的序列号对应的顺序优于所述第二接入点的序 列号对应的顺序, 因此站点将首先接收到所述第一接入点返回的应答消息。
更具体地,若所述第一接入点和所述第二接入点在接收到所述通信消息时 均会返回应答消息,则所述站点在第一预设时间内接收到所述第一接入点返回 的应答消息时, 不等待所述第二接入点返回应答消息, 直接与所述第一接入点 进行数据通信;若所述站点在所述第一预设时间内未接收到所述第一接入点返 回的应答消息, 则继续等待所述第二接入点返回应答消息, 若所述站点在所述 第二预设时间内接收到所述第二接入点返回的应答消息,则与所述第二接入点 进行数据通信;若所述站点在第二预设时间内未接收到所述第二接入点返回的 应答消息, 则判定通信失败; 或
所述站点在所述第一预设时间内接收到所述第一接入点返回的应答消息 时, 广播用于表明已获取应答消息的确认消息, 以便所述第二接入点在接收到 所述确认消息后不再返回应答消息,所述站点与所述第一接入点进行数据通信。
其中, 若仅所述第一接入点在接收到所述通信消息时会返回应答消息, 当 所述站点在所述第一预设时间内未接收到所述第一接入点返回的应答消息时, 广播用于请求返回应答消息的请求消息,以便所述第二接入点在接收到所述请 求消息后返回应答消息。
若所述站点在所述第二预设时间内接收到所述第二接入点返回的应答消 息, 则与所述第二接入点进行数据通信; 若所述站点在第二预设时间内未接收 到所述第二接入点返回的应答消息, 则判定通信失败。
需要说明的是, 若所述第一接入点和所述第二接入点工作在同一信道, 则 所述站点在所述信道广播所述通信消息;若所述第一接入点和所述第二接入点 工作在不同信道,则所述站点在所述第一接入点工作的信道广播所述通信消息, 当与所述第一接入点通信失败时,所述站点更换至所述第二接入点工作的信道 并广播所述通信消息。从而确保站点与工作在不同信道的接入点实现通信,提 升所述站点竟争得到信道的概率。
在本实施例中,主要描述了针对成功接收任一个接入点的返回消息并进行 数据通信的流程, 由于无需等待其他接入点返回应答消息, 因此本实施例所述 的通信方法可以较快的确定通信的接入点, 提高了数据通信的效率。
请参照图 4, 为本发明通信方法的第三实施例的流程示意图, 在本实施例 中, 所述方法包括以下步骤:
S401 , 站点与接入点进行关联认证。
其中, 所述接入点至少包括第一接入点和第二接入点。 5402,所述站点发送序列号到所述第一接入点和所述第二接入点,所述序 列号用于指示各个接入点应答所述站点的顺序。
5403 ,所述站点广播通信消息, 以便所述第一接入点和所述第二接入点在 接收到所述通信消息后, 根据所述序列号按顺序返回应答消息给所述站点。
S404, 所述站点接收所述第一接入点和所述第二接入点返回的应答消息, 根据信息交互时的信道质量,选择信息交互时信道质量好的接入点进行数据通 信。
具体地, 可包括: 若所述第一接入点和所述第二接入点在接收到所述通信 消息时均会返回应答消息,则在所述站点接收到所述第一接入点和所述第二接 入点按顺序返回的应答消息时,根据信息交互时的信道质量,选择信息交互时 信道质量好的接入点进行数据通信; 或
若在接入点一侧为了减少系统整体功耗、减少站点等待时间的考虑, 配置 所有接入点中仅获取的序列号为首位的接入点会返回应答消息即本实施例中, 若仅所述第一接入点在接收到所述通信消息时会返回应答消息,则在所述站点 接收到所述第一接入点返回的应答消息时,广播用于请求返回应答消息的请求 消息, 以便所述第二接入点在接收到所述请求消息后返回应答消息, 所述站点 根据信息交互时的信道质量,选择信息交互时信道质量好的接入点进行数据通 信。
在本实施例中,给出了根据多个甚至所有接入点返回的应答消息选择通信 的接入点的方法, 虽然需要等待多个接入点返回应答消息,但是站点可以根据 信息交互时的信道质量选择信道质量较佳的接入点进行通信,利于提高选择的 接入点的通信质量。
需要说明的是,实施例二与实施例三在提升站点总体工作效率的目的上采 用了不同的实现方式,在具体实施时, 可根据实际情况例如接入点的数量等进 行合适的选择。若接入点数量较少, 则可以等待多个接入点返回应答消息后再 选择信道质量较佳的接入点进行通信, 若接入点数量较多, 则可以在接收到任 意一个接入点返回的应答消息时即确定该接入点为通信的接入点并进行数据 通信。
请参照图 5 , 为本发明通信方法的第四实施例的流程示意图, 在本实施例 中, 所述方法包括以下步骤:
5501 , 站点与接入点进行关联认证。
其中, 所述接入点至少包括第一接入点和第二接入点。
5502,所述站点发送序列号到所述第一接入点和所述第二接入点,所述序 列号用于指示各个接入点应答所述站点的顺序。
5503 ,所述站点广播通信消息, 以便所述第一接入点和所述第二接入点在 接收到所述通信消息后, 根据所述序列号按顺序返回应答消息给所述站点。
5504,所述站点接收所述第一接入点和所述第二接入点中至少一个接入点 返回的应答消息, 与至少一个返回应答消息的接入点建立通信连接。
S505 ,所述站点接收已建立通信连接的接入点发送的通信设置消息,根据 所述通信设置消息与所述已建立通信连接的接入点进行通信。
其中,所述已建立通信连接的接入点包括已与所述站点进行数据通信的接 入点或未与所述站点进行数据通信但已被所述站点确定为进行数据通信的接 入点, 所述通信设置消息包括以下信息中的至少一种: 通信时间信息、 窗口长 度信息。
具体地, 工作在同一信道, 与同一个站点关联的接入点如果要发送下行数 据给所述站点, 多个接入点可以采用竟争方式进行发送。可以通过设定不同的 通信以及窗口长度来避免多个接入点与同一个站点通信的沖突。相应的参数信 息可以使用新的命令进行通告,或者在已有的数据帧,管理帧或控制帧中携带。 且在所述通信时间信息指示的通信时间内,站点可与已建立通信连接的接入点 进行任意次持续或间断的通信。
下面, 以站点与两个接入点进行通信的场景进行通信过程的说明。
请一并参照图 6-图 10, 分别为本发明通信方法的第五至第九实施例的流 程示意图,在这些实施例中, 第一接入点和第二接入点接收到站点的通信消息 均会返回应答消息。 如图 6所示:
站点广播通信消息,在第一接入点返回应答消息后, 站点即可以与第一接 入点进行数据通信。 此处的通信消息可以是携带数据的数据消息, 也可以是 RTS , 对应地, 应答消息可以是 ACK, 也可以是 CTS。
若第一接入点返回应答消息失败, 则如图 7所示, 站点可以等待第二接入 点返回应答消息, 并与第二接入点进行数据通信。 则如图 8所示, 所述站点可以根据信息交互时的信道质量,选择信息交互时信 道质量好的接入点进行数据通信。
若两个接入点均返回应答消息失败, 则如图 9所示, 站点判定通信失败。 当然, 若还存在第三接入点, 则所述站点还可以继续等待第三接入点返回应答 消息。
若所述站点仅需要获取一个接入点的应答消息即与给接入点进行数据通 信, 则可以如图 10所示, 在站点接收到第一接入点返回的应答消息后, 广播 用于表明已获取应答消息的确认消息, 以便第二接入点接收确认消息后, 不再 返回应答消息给站点, 站点与第一接入点进行数据通信即可, 这样在接入点数 量较多时, 可以避免多个接入点再返回应答消息, 从而减少信令开销, 节省信 令及信道资源。所述确认消息中可以携带第一接入点的标识以便其他接入点了 解与站点进行数据通信的接入点。
请一并参照图 11-图 12, 分别为本发明通信方法的第十和第十一实施例的 流程示意图,在这些实施例中, 第一接入点和第二接入点接收到站点的通信消 息仅第一接入点会主动返回应答消息。 如图 11所示:
站点广播通信消息, 第一接入点返回应答消息失败, 则此时, 站点可以广 播请求返回应答消息的请求消息, 以便第二接入点返回应答消息,从而与第二 接入点进行数据通信。此处的通信消息可以是携带数据的数据消息,也可以是 RTS, 对应地, 应答消息可以是 ACK, 也可以是 CTS。 所述请求消息中可以 携带第一接入点的标识以便其他接入点了解未返回应答消息的接入点。第一接 入点若接收到该请求消息后, 可以返回应答消息, 也可以不返回, 此处不作任 何限定。
若第一接入点返回应答消息成功,但是站点还想接收其他接入点的应答消 息, 则可以如图 12所示, 广播用于请求返回应答消息的请求消息, 第二接入 点返回应答消息,站点再根据信息交互时的信道质量,选择其中一个接入点进 行数据通信。
请参照图 13, 为本发明通信方法的第十二实施例的流程示意图, 在本实 施例中, 所述方法包括以下步骤:
1.站点广播 RTS。
2.第一接入点和第二接入点按照序列号对应的顺序返回 CTS。
3.站点根据信息交互时的信道质量, 选择第一接入点进行数据通信。 (假 设此时站点与第一接入点信息交互时的信道质量较佳 )
4.站点发送数据消息至第一接入点, 进行数据通信。 所述数据消息中携带 数据。
需要说明的是, 若采用本实施例中广播 RTS 的方式, 则需要在确定通信 的接入点之后才能进行数据通信,在确定接入点的过程中, 无需携带大量的数 据, 可节省信道资源。 而如图 6-图 12即本发明第五至第十一实施例中所述的 通信方法, 当通信消息直接为携带数据的数据消息时,确定通信的接入点的过 程中即可以完成一次数据通信, 这样可以减少信息交互的次数。 当然, 图 6 至图 12所述的通信方法流程在通信消息为 RTS时同样适用, 只需要在通信的 接入点确定以后, 再增加一个发送数据消息的流程即可。
请参照图 14,为本发明站点的第一实施例的组成示意图,在本实施例中, 所述站点包括: 关联单元 100、 发送单元 200、 消息广播单元 300及接收单元 400。
关联单元 100, 用于与接入点进行关联认证。
所述接入点至少包括第一接入点和第二接入点。
发送单元 200, 用于发送序列号到所述第一接入点和所述第二接入点, 所 述序列号用于指示各个接入点应答所述站点的顺序;
消息广播单元 300, 用于广播通信消息, 以便所述第一接入点和所述第二 接入点在接收到所述通信消息后,根据所述序列号按顺序返回应答消息给所述 站点;
接收单元 400, 用于接收所述第一接入点和所述第二接入点中至少一个接 入点返回的应答消息, 与至少一个返回应答消息的接入点进行数据通信。
所述接收单元 400具体用于:
接收所述第一接入点或所述第二接入点返回的应答消息,与所述第一接入 点或所述第二接入点进行数据通信; 或 接收所述第一接入点和所述第二接入点返回的应答消息,根据信息交互时 的信道质量, 选择信息交互时信道质量好的接入点进行数据通信。
更具体地, 所述接收单元 400具体用于:
若所述第一接入点和所述第二接入点在接收到所述通信消息时均会返回 应答消息,在第一预设时间内接收到所述第一接入点返回的应答消息时, 不等 待所述第二接入点返回应答消息, 直接与所述第一接入点进行数据通信; 若所 述接收单元在所述第一预设时间内未接收到所述第一接入点返回的应答消息, 则继续等待所述第二接入点返回应答消息; 或
在所述第一预设时间内接收到所述第一接入点返回的应答消息时,指示所 述消息广播单元 300广播用于表明已获取应答消息的确认消息,以便所述第二 接入点在接收到所述确认消息后不再返回应答消息,所述接收单元 400与所述 第一接入点进行数据通信。
若仅所述第一接入点在接收到所述通信消息时会返回应答消息,当所述接 收单元 400在所述第一预设时间内未接收到所述第一接入点返回的应答消息 时,指示所述消息广播单元 300广播用于请求返回应答消息的请求消息, 以便 所述第二接入点在接收到所述请求消息后返回应答消息。
所述接收单元 400具体用于:
若所述第一接入点和所述第二接入点在接收到所述通信消息时均会返回 应答消息,则在所述接收单元 400接收到所述第一接入点和所述第二接入点按 顺序返回的应答消息时,根据信息交互时的信道质量,选择信息交互时信道质 量好的接入点进行数据通信; 或
若仅所述第一接入点在接收到所述通信消息时会返回应答消息,则在所述 接收单元接收到所述第一接入点返回的应答消息时, 指示所述消息广播单元 300广播用于请求返回应答消息的请求消息, 以便所述第二接入点在接收到所 述请求消息后返回应答消息, 所述接收单元 400根据信息交互时的信道质量, 选择选择信息交互时信道质量好的接入点进行数据通信。
其中, 所述通信消息为数据消息, 所述数据消息中携带通信的数据, 所述 应答消息为确认字符; 或
所述通信消息为请求发送消息 RTS, 所述应答消息为允许发送消息 CTS, 所述请求发送消息 RTS用于所述站点向所述接入点请求发送数据, 所述允许 发送消息 CTS用于所述接入点允许所述站点发送数据。
若所述通信消息为 RTS ,所述应答消息为 CTS,则所述接收单元 400具体 用于:
接收所述第一接入点和所述第二接入点中至少一个接入点返回的 CTS; 根据所述第一接入点和所述第二接入点中至少一个接入点返回的 CTS,确 定进行数据通信的接入点;
发送数据消息至所述确定通信的接入点,与所述确定通信的接入点进行数 据通信, 其中, 所述数据消息中携带通信的数据。
所述接收单元 300还用于:
接收已建立通信连接的接入点发送的通信设置消息,根据所述通信设置消 息与所述已建立通信连接的接入点进行通信;
其中, 所述通信设置消息包括以下信息中的至少一种: 通信时间信息、 窗 口长度信息。
请参照图 15 ,为本发明站点的第二实施例的组成示意图,在本实施例中, 所述站点包括: 关联单元 100、 发送单元 200、 消息广播单元 300、 接收单元 400及信道切换单元 500。
关联单元 100, 用于与接入点进行关联认证。
所述接入点至少包括第一接入点和第二接入点。
发送单元 200, 用于发送序列号到所述第一接入点和所述第二接入点, 所 述序列号用于指示各个接入点应答所述站点的顺序;
消息广播单元 300, 用于广播通信消息, 以便所述第一接入点和所述第二 接入点在接收到所述通信消息后,根据所述序列号按顺序返回应答消息给所述 站点;
接收单元 400, 用于接收所述第一接入点和所述第二接入点中至少一个接 入点返回的应答消息, 与至少一个返回应答消息的接入点进行数据通信。
信道切换单元 500, 用于若所述第一接入点和所述第二接入点工作在同一 信道, 则所述消息广播单元 300在所述信道广播所述通信消息; 若所述第一接 入点和所述第二接入点工作在不同信道,则所述消息广播单元 300在所述第一 接入点工作的信道广播所述通信消息, 当与所述第一接入点通信失败时,所述 信道切换单元 500 更换至所述第二接入点工作的信道并指示所述消息广播单 元 300广播所述通信消息。
需要说明的是, 以上关联单元可以由关联子单元和认证子单元集合而成, 也可以独立存在,接收单元可以由接收子单元和通信子单元集合而成,也可以 独立存在。 且以上站点实施例中关联单元和 /或接收单元可以以硬件的形式独 立于站点的处理器单独设置,且设置形式可以是微处理器的形式; 也可以以硬 件形式内嵌于站点的处理器中,还可以以软件形式存储于站点的存储器中, 以 便于站点的处理器调用执行以上关联单元或接收单元对应的操作。
例如, 在本发明站点的第一实施例 (图 14所示的实施例) 中, 关联单元 100和 /或接收单元 400可以为站点的处理器,而发送单元 200和消息广播单元 300的功能可以内嵌于该处理器中。 另外, 图 15所示的信道切换单元 500同 关联单元 100或接收单元 400, 可以独立于处理器单独设置, 也可以内嵌于处 理器,也可以以软件的形式存储于存储器中,由处理器调用实现其功能。当然, 发送单元 200和消息广播单元 300可以集成设置,也可以独立设置,发送单元 200和消息广播单元 300可以作为站点的接口电路, 也可以与关联单元 100、 接收单元 400或信道切换单元 500集成,也可以独立设置。本发明实施例不做 任何限制。 以上处理器可以为中央处理单元(CPU )、 微处理器、 单片机等。
请参照图 16,为本发明站点的第三实施例的组成示意图,在本实施例中, 所述站点包括: 接口电路 110、 存储器 120以及与所述接口电路 110和存储器 120相连接的处理器 130。其中存储器 120用于存储一组程序代码,处理器 130 用于调用存储器 120中存储的程序代码,执行本发明通信方法的第一至第十二 任一实施例中所述的操作。
请参照图 17, 为本发明实施例系统的组成示意图, 在本实施例中, 所述 系统包括:
如本发明站点的第一至第三任一实施例所述的站点 140;
第一接入点 150及第二接入点 160。
所述第一接入点 150和第二接入点 160用于与所述站点 140进行关联认证, 接收所述站点 140发送的对应的序列号,所述序列号用于指示各个接入点应答 所述站点的顺序,在接收到所述站点 140广播的通信消息时,根据所述序列号 按顺序返回应答消息给所述站点 140, 以便所述站点 140接收至少一个接入点 返回的应答消息并与至少一个返回应答消息的接入点进行数据通信。 若所述站点 140与所述至少两个接入点中的任一接入点建立通信连接,则 与所述站点 140 已建立通信连接的接入点还用于发送通信设置消息至所述站 点 140, 以便所述站点 140根据所述通信设置消息与所述已建立通信连接的接 入点进行数据通信;
其中,所述已建立通信连接的接入点包括已与所述站点 140进行数据通信 的接入点或未与所述站点 140进行数据通信但已被所述站点 140确定为进行数 据通信的接入点,所述通信设置消息包括以下信息中的至少一种: 通信时间信 息、 窗口长度信息。
当然, 本实施例中仅描述了两个接入点的情况, 当在 OBSS系统中, 站点 可扫描到 3个及以上的接入点时,其通信的过程与仅存在两个接入点的情况类 似, 此处不再赘述。
需要说明的是, 本说明书中的各个实施例均采用递进的方式描述,每个实 施例重点说明的都是与其它实施例的不同之处,各个实施例之间相同相似的部 分互相参见即可。 对于装置实施例而言, 由于其与方法实施例基本相似, 所以 描述的比较筒单, 相关之处参见方法实施例的部分说明即可。
通过上述实施例的描述, 本发明具有以下优点:
在 OBSS系统中,通过为接入点分配序列号使得各个接入点按顺序响应站 点的通信消息, 这样位于相邻 BSS 交叠区域的站点, 就可以与多个接入点进 行通信的尝试连接, 即该站点可以同时在两个 BSS 中竟争信道, 从而提高了 站点竟争到信道并发送数据的概率, 利于提升站点的吞吐量。
本领域普通技术人员可以理解:实现上述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。
以上对本发明实施例所提供的一种通信方法、站点及系统进行了详细介绍, 说明只是用于帮助理解本发明的方法及其核心思想; 同时,对于本领域的一般 技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种通信方法, 其特征在于, 包括:
站点与接入点进行关联认证,所述接入点至少包括第一接入点和第二接入 点;
所述站点发送序列号到所述第一接入点和所述第二接入点,所述序列号用 于指示各个接入点应答所述站点的顺序;
所述站点广播通信消息,以便所述第一接入点和所述第二接入点在接收到 所述通信消息后, 根据所述序列号按顺序返回应答消息给所述站点;
所述站点接收所述第一接入点和所述第二接入点中至少一个接入点返回 的应答消息, 与至少一个返回应答消息的接入点进行数据通信。
2、 如权利要求 1所述的方法, 其特征在于, 所述站点接收所述第一接入 点和所述第二接入点中至少一个接入点返回的应答消息,与至少一个返回应答 消息的接入点进行数据通信, 包括:
所述站点接收所述第一接入点或所述第二接入点返回的应答消息,与所述 第一接入点或所述第二接入点进行数据通信; 或
所述站点接收所述第一接入点和所述第二接入点返回的应答消息,根据信 息交互时的信道质量, 选择信息交互时信道质量好的接入点进行数据通信。
3、 如权利要求 2所述的方法, 其特征在于, 所述第一接入点和所述第二 接入点在接收到所述通信消息时均会返回应答消息,所述站点接收所述第一接 入点或所述第二接入点返回的应答消息,与所述第一接入点或所述第二接入点 进行数据通信, 包括:
所述站点在第一预设时间内接收到所述第一接入点返回的应答消息时,不 等待所述第二接入点返回应答消息, 直接与所述第一接入点进行数据通信; 若 所述站点在所述第一预设时间内未接收到所述第一接入点返回的应答消息,则 继续等待所述第二接入点返回应答消息; 或
所述站点在所述第一预设时间内接收到所述第一接入点返回的应答消息 时, 广播用于表明已获取应答消息的确认消息, 以便所述第二接入点在接收到 所述确认消息后不再返回应答消息,所述站点与所述第一接入点进行数据通信。
4、 如权利要求 3所述的方法, 其特征在于, 若仅所述第一接入点在接收 到所述通信消息时会返回应答消息,当所述站点在所述第一预设时间内未接收 到所述第一接入点返回的应答消息时,广播用于请求返回应答消息的请求消息, 以便所述第二接入点在接收到所述请求消息后返回应答消息。
5、 如权利要求 2-4任一项所述的方法, 其特征在于, 所述站点接收所述 第一接入点和所述第二接入点返回的应答消息, 根据信息交互时的信道质量, 选择信息交互时信道质量好的接入点进行数据通信, 包括:
若所述第一接入点和所述第二接入点在接收到所述通信消息时均会返回 应答消息,则在所述站点接收到所述第一接入点和所述第二接入点按顺序返回 的应答消息时,根据信息交互时的信道质量,选择信息交互时信道质量好的接 入点进行数据通信; 或
若仅所述第一接入点在接收到所述通信消息时会返回应答消息,则在所述 站点接收到所述第一接入点返回的应答消息时,广播用于请求返回应答消息的 请求消息, 以便所述第二接入点在接收到所述请求消息后返回应答消息,所述 站点根据信息交互时的信道质量,选择信息交互时信道质量好的接入点进行数 据通信。
6、 如权利要求 1-5任一项所述的方法, 其特征在于, 包括:
所述通信消息为数据消息, 所述数据消息中携带通信的数据, 所述应答消 息为确认字符; 或
所述通信消息为请求发送消息 RTS, 所述应答消息为允许发送消息 CTS, 所述请求发送消息 RTS用于所述站点向所述接入点请求发送数据, 所述允许 发送消息 CTS用于所述接入点允许所述站点发送数据。
7、 如权利要求 6所述的方法, 其特征在于, 若所述通信消息为 RTS, 所 述应答消息为 CTS,则所述站点接收所述第一接入点和所述第二接入点中至少 一个接入点返回的应答消息,与至少一个返回应答消息的接入点进行数据通信, 包括:
所述站点接收所述第一接入点和所述第二接入点中至少一个接入点返回 的 CTS;
根据所述第一接入点和所述第二接入点中至少一个接入点返回的 CTS,确 定进行数据通信的接入点;
发送数据消息至所述确定通信的接入点,与所述确定通信的接入点进行数 据通信, 其中, 所述数据消息中携带通信的数据。
8、 如权利要求 1-7任一项所述的方法, 其特征在于, 若所述第一接入点 和所述第二接入点工作在同一信道,则所述站点在所述信道广播所述通信消息; 若所述第一接入点和所述第二接入点工作在不同信道,则所述站点在所述第一 接入点工作的信道广播所述通信消息, 当与所述第一接入点通信失败时,所述 站点更换至所述第二接入点工作的信道并广播所述通信消息。
9、 如权利要求 1-8任一项所述的方法, 其特征在于, 所述站点与至少一 个返回应答消息的接入点进行数据通信之前, 还包括:
所述站点接收已建立通信连接的接入点发送的通信设置消息,根据所述通 信设置消息与所述已建立通信连接的接入点进行通信;
其中,所述已建立通信连接的接入点包括已与所述站点进行数据通信的接 入点或未与所述站点进行数据通信但已被所述站点确定为进行数据通信的接 入点, 所述通信设置消息包括以下信息中的至少一种: 通信时间信息、 窗口长 度信息。
10、 一种站点, 其特征在于, 包括:
关联单元, 用于与接入点进行关联认证, 所述接入点至少包括第一接入点 和第二接入点;
发送单元, 用于发送序列号到所述第一接入点和所述第二接入点, 所述序 列号用于指示各个接入点应答所述站点的顺序;
消息广播单元, 用于广播通信消息, 以便所述第一接入点和所述第二接入 点在接收到所述通信消息后,根据所述序列号按顺序返回应答消息给所述站点; 接收单元,用于接收所述第一接入点和所述第二接入点中至少一个接入点 返回的应答消息, 与至少一个返回应答消息的接入点进行数据通信。
11、 如权利要求 10所述的站点, 其特征在于, 所述接收单元具体用于: 接收所述第一接入点或所述第二接入点返回的应答消息,与所述第一接入 点或所述第二接入点进行数据通信; 或
接收所述第一接入点和所述第二接入点返回的应答消息,根据信息交互时 的信道质量, 选择信息交互时信道质量好的接入点进行数据通信。
12、 如权利要求 11所述的站点, 其特征在于, 若所述第一接入点和所述 第二接入点在接收到所述通信消息时均会返回应答消息,所述接收单元具体用 于:
在第一预设时间内接收到所述第一接入点返回的应答消息时,不等待所述 第二接入点返回应答消息, 直接与所述第一接入点进行数据通信; 若所述接收 单元在所述第一预设时间内未接收到所述第一接入点返回的应答消息,则继续 等待所述第二接入点返回应答消息; 或
在所述第一预设时间内接收到所述第一接入点返回的应答消息时,指示所 述消息广播单元广播用于表明已获取应答消息的确认消息,以便所述第二接入 点在接收到所述确认消息后不再返回应答消息,所述接收单元与所述第一接入 点进行数据通信。
13、 如权利要求 12所述的站点, 其特征在于, 若仅所述第一接入点在接 收到所述通信消息时会返回应答消息,当所述接收单元在所述第一预设时间内 未接收到所述第一接入点返回的应答消息时,指示所述消息广播单元广播用于 请求返回应答消息的请求消息,以便所述第二接入点在接收到所述请求消息后 返回应答消息。
14、 如权利要求 11-13任一项所述的站点, 其特征在于, 所述接收单元具 体用于: 若所述第一接入点和所述第二接入点在接收到所述通信消息时均会返回 应答消息,则在所述接收单元接收到所述第一接入点和所述第二接入点按顺序 返回的应答消息时,根据信息交互时的信道质量,选择信息交互时信道质量好 的接入点进行数据通信; 或
若仅所述第一接入点在接收到所述通信消息时会返回应答消息,则在所述 接收单元接收到所述第一接入点返回的应答消息时,指示所述消息广播单元广 播用于请求返回应答消息的请求消息,以便所述第二接入点在接收到所述请求 消息后返回应答消息, 所述接收单元根据信息交互时的信道质量,选择选择信 息交互时信道质量好的接入点进行数据通信。
15、 如权利要求 10-14任一项所述的站点, 其特征在于, 包括:
所述通信消息为数据消息, 所述数据消息中携带通信的数据, 所述应答消 息为确认字符; 或
所述通信消息为请求发送消息 RTS, 所述应答消息为允许发送消息 CTS, 所述请求发送消息 RTS用于所述站点向所述接入点请求发送数据, 所述允许 发送消息 CTS用于所述接入点允许所述站点发送数据。
16、 如权利要求 15所述的站点, 其特征在于, 若所述通信消息为 RTS, 所述应答消息为 CTS, 则所述接收单元具体用于:
接收所述第一接入点和所述第二接入点中至少一个接入点返回的 CTS; 根据所述第一接入点和所述第二接入点中至少一个接入点返回的 CTS,确 定进行数据通信的接入点;
发送数据消息至所述确定通信的接入点,与所述确定通信的接入点进行数 据通信, 其中, 所述数据消息中携带通信的数据。
17、如权利要求 10-16任一项所述的站点,其特征在于,所述站点还包括: 信道切换单元,用于若所述第一接入点和所述第二接入点工作在同一信道, 则所述消息广播单元在所述信道广播所述通信消息;若所述第一接入点和所述 第二接入点工作在不同信道,则所述消息广播单元在所述第一接入点工作的信 道广播所述通信消息, 当与所述第一接入点通信失败时, 所述信道切换单元更 换至所述第二接入点工作的信道并指示所述消息广播单元广播所述通信消息。
18、 如权利要求 10-17任一项所述的站点, 其特征在于, 所述接收单元还 用于:
接收已建立通信连接的接入点发送的通信设置消息,根据所述通信设置消 息与所述已建立通信连接的接入点进行通信;
其中,所述已建立通信连接的接入点包括已与所述站点进行数据通信的接 入点或未与所述站点进行数据通信但已被所述站点确定为进行数据通信的接 入点, 所述通信设置消息包括以下信息中的至少一种: 通信时间信息、 窗口长 度信息。
19、 一种计算机程序产品, 包括计算机可读介质, 所述计算机可读介质包 括一组程序代码, 用于执行如权利要求 1-9任一项所述的方法。
20、 一种系统, 其特征在于, 包括:
如权利要求 10-18任一项所述的站点;
至少两个接入点,用于与所述站点进行关联认证,接收所述站点发送的对 应的序列号, 所述序列号用于指示各个接入点应答所述站点的顺序, 在接收到 所述站点广播的通信消息时,根据所述序列号按顺序返回应答消息给所述站点 , 以便所述站点接收至少一个接入点返回的应答消息并与至少一个返回应答消 息的接入点进行数据通信。
21、 如权利要求 20所述的系统, 其特征在于, 若所述站点与所述至少两 个接入点中的任一接入点建立通信连接,则与所述站点已建立通信连接的接入 点还用于发送通信设置消息至所述站点,以便所述站点根据所述通信设置消息 与所述已建立通信连接的接入点进行数据通信;
其中,所述已建立通信连接的接入点包括已与所述站点进行数据通信的接 入点或未与所述站点进行数据通信但已被所述站点确定为进行数据通信的接 入点, 所述通信设置消息包括以下信息中的至少一种: 通信时间信息、 窗口长 度信息。
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