WO2011140878A1 - 一种无线局域网的业务接入方法、设备及系统 - Google Patents

一种无线局域网的业务接入方法、设备及系统 Download PDF

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Publication number
WO2011140878A1
WO2011140878A1 PCT/CN2011/072734 CN2011072734W WO2011140878A1 WO 2011140878 A1 WO2011140878 A1 WO 2011140878A1 CN 2011072734 W CN2011072734 W CN 2011072734W WO 2011140878 A1 WO2011140878 A1 WO 2011140878A1
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Prior art keywords
terminal
channel
access point
association
proxy
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PCT/CN2011/072734
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English (en)
French (fr)
Inventor
刘国平
张慧敏
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华为技术有限公司
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Publication of WO2011140878A1 publication Critical patent/WO2011140878A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a service access method, device, and system for a wireless local area network.
  • WLAN Wireless Local Area Networks
  • the standard IEEE 802.11 for wireless local area networks is a standard for communication between wireless networks defined by the Institute of Electrical and Electronics Engineers (IEEE).
  • the standards for WLAN systems defined by IEEE 802.11 include 802. l ib, 802.11a, 802. l lg and 802. l ln multiple standards, the maximum air interface rate supported by various standards is quite different, the maximum air interface rate of 802. l ib is usually 11Mbps, 802. l lg The maximum air interface rate is usually 54Mbps, and the newly released 802. l ln supports a maximum air interface rate of 600Mbps.
  • WLAN networks need to consider backward compatibility when developing new standards. The newly developed standards must support the old standards. For example, 802.
  • 802. l ln access points (APs, equivalent to mobile network base stations) need to be simultaneously Supports the access of the traditional 802. l la/b/g terminal device (STA, Station).
  • STA Station
  • the maximum air interface rate supported by 802. l ln is ten to several times that of the traditional terminal.
  • RF cards are configured on the 802.11nAP. Different RF cards are used to access different terminals, that is, they are used to access the 802.1 In STA and access the legacy terminal respectively, and work on different channels, so that the traditional The terminal does not affect the system throughput of the channel where the 802. l ln STA is located.
  • This method of configuring multiple RF cards increases the cost of 802.11nAP because 802.11n is required to configure multiple RF cards.
  • Embodiments of the present invention provide a method, device, and system that can reduce the network throughput of a high transmission rate access point without increasing the cost and ensuring network compatibility.
  • the service access method of the WLAN includes: the first terminal establishes an association with the access point on the first channel; the first terminal establishes an association between the access point and the second terminal in the second channel; When the preset condition is met, the first terminal is responsible for communication between the access point and the second terminal; the data transmission rate of the first terminal is higher than the data transmission rate of the second terminal.
  • the method for accessing a service of a wireless local area network includes: establishing an association with a first terminal; and determining, when the first channel receives a probe request or an association request sent by the second terminal, determining that the first terminal is in the first Whether there is a proxy access point in the two channels, if yes, rejecting the probe request or the association request of the second terminal, or not responding to the probe request or the association request; when receiving the proxy access point forwarding And responding to the association request forwarded by the proxy access point; the data transmission rate of the first terminal is higher than the transmission rate of the second terminal.
  • a user terminal provided by the embodiment of the present invention includes: a first association unit, configured to establish an association with an access point on a first channel, and establish an association between the access point and a second terminal in a second channel proxy; And a unit, configured to proxy communication between the access point and the second terminal when a preset condition is met.
  • the service access point includes: a second association unit, configured to establish an association with the first terminal, and a processing unit, configured to: when the first terminal receives the probe request or association sent by the second terminal, When the request is made, it is determined whether the first terminal has a proxy access point in the second channel, and if yes, rejects the probe request or the association request of the second terminal, or does not request the probe request or association Responding to the response, and, when receiving the association request of the second terminal forwarded by the proxy access point, responding to the association request.
  • a service access system includes: a first terminal, configured to establish an association with an access point on a first channel, and an association between the access point and a second terminal in a second channel proxy, when When the preset condition is met, the communication between the access point and the second terminal is proxyed; the access point is configured to establish an association with the first terminal on the first channel, and the first terminal agent and the second terminal The terminal performs communication; the second terminal is configured to establish an association with the first terminal on the second channel, and the first terminal agent communicates with the access point.
  • the embodiments of the present invention have the following advantages:
  • the first terminal first establishes an association with the access point on the first channel, and then associates the access point with the second terminal in the second channel, in the first channel and the second channel. Switching between the channels, the access point of the first channel and the second terminal of the second channel are communicated, so as to ensure that the high transmission rate is not lowered on the premise of network compatibility without increasing the cost. Incoming network throughput.
  • FIG. 1 is a schematic diagram of an embodiment of a method for accessing a service of a wireless local area network according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a method for communicating a wireless local area network terminal with an access point according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of another embodiment of a service access method for a wireless local area network according to an embodiment of the present invention
  • FIG. 5 is another embodiment of a service access method for a wireless local area network according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of an embodiment of a user terminal according to an embodiment of the present invention
  • FIG. 1 is a schematic diagram of an embodiment of a method for accessing a service of a wireless local area network according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a method for communicating a wireless local area network terminal with an access point according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of another embodiment of a service access method for
  • FIG. 7 is a schematic diagram of an embodiment of a service access point according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an embodiment of a service access system according to an embodiment of the present invention.
  • an embodiment of a method for accessing a service of a wireless local area network includes:
  • the first terminal establishes an association with the access point on the first channel.
  • the first terminal first establishes an association with the access point on one channel, and establishes an association manner.
  • the first terminal may send an association request to the access point, and the access point sends feedback information to the first terminal. It means to agree to the association and establish the association. It should be noted that there are other ways to establish the association.
  • the specific establishment method is related to the application process, and is not specifically limited here.
  • the first terminal associates the access point with the second terminal by using the second channel.
  • the first terminal brokers the access point to associate with the second terminal on another independent channel.
  • the first terminal may associate with the access point on the first channel, and serve as the interface on the second channel.
  • the proxy access point of the ingress is associated with the second terminal to perform data transmission and reception, and the data transmission rate of the first terminal is higher than the data transmission rate of the second terminal.
  • the first terminal proxyes communication between the access point and the second terminal.
  • the first terminal may proxy the access point to communicate with the second terminal, and the preset conditions that need to be met in this embodiment are further described in the following embodiments. .
  • the first terminal establishes an association with the access point in the first channel, and then, in the second channel, the proxy access point that is the access point establishes an association with the second terminal, when a certain
  • the first terminal may proxy the access point to communicate with the second terminal, that is, the communication between the access point and the second terminal is completed by the first terminal agent, thereby achieving high maintenance while ensuring network compatibility.
  • the throughput of the transmission rate network and does not increase the cost of additional equipment.
  • the first terminal 202 can be an 802.11 terminal
  • the second terminal 203 can be an 802.l lg terminal or an 802. l ib terminal
  • the access point 201 can be 802.11n.
  • the first terminal 202 is connected to the access point 201 on channel 1 (referred to as the primary channel), and the first terminal 202 is connected to the second terminal 203 on the channel 6 (referred to as the secondary channel).
  • the first terminal 202 forwards the data of the second terminal 203 to the access point 201, and the access point 201 The data is forwarded to the second terminal 203, wherein the second terminal 203 has a lower data transmission rate than the first terminal 201.
  • another embodiment of the wireless local area network service access method in the embodiment of the present invention includes:
  • step 301 in this embodiment is the same as that of the step 101 in the foregoing embodiment shown in FIG. 1, and details are not described herein again.
  • first channel in this embodiment may be a primary channel
  • second channel may be a secondary channel
  • the 802.1 In AP is used as the access point
  • the 802.1 In terminal is used as the first terminal
  • the 802.11b terminal is used as the second terminal. It can be understood that, in practical applications, the access point, The first terminal and the second terminal are also other types of devices, which are not limited herein.
  • the 802.1 lb terminal searches for the WLAN network, if the active detection mode is adopted, the 802.1 lb terminal sends a Probe Request frame on the first channel, and the 802.11 ⁇ AP first determines the 802.1 in terminal associated with the 802.11nAP. Is there a terminal that performs proxy functions?
  • the 802.11n AP when the 802.11n AP establishes association with the 802.1 In terminal, it sends an identification identifier to the 802.11n terminal, and then the 802.11n AP scans the 802.1 In terminal, when it can scan When the flag is recognized, it can be judged that there is a terminal that performs the proxy function in the 802.11n terminal.
  • the 802.11n AP rejects or does not respond to the association request of the 802.11b terminal, and the 802.1 lb terminal switches to the second channel to continue transmitting the probe request frame, and then performs the proxy function of the 802.11n terminal (ie, The proxy AP) receives the probe request sent by the 802.11b terminal.
  • the proxy AP In the second channel, after receiving the probe request sent by the 802.11b terminal, the proxy AP responds to the probe request and feeds back the response to the 802.1 lb terminal.
  • the 802.11b terminal decides to associate with the proxy AP in the second channel, and sends an association request frame to the proxy AP (ie, the 802.11n terminal), and the proxy AP receives the association request frame sent by the 802.11b terminal.
  • the proxy AP ie, the 802.11n terminal
  • the proxy AP receives the association request frame sent by the 802.11b terminal.
  • the proxy AP shall convert the association request frame into a format, and then send it to the 802. l ln AP on the first channel, and the converted frame format has the capability of 802. l ln
  • the related content, the address information is unchanged, and the specific frame format before and after the conversion will be described in detail in the subsequent embodiments.
  • the 802.lnln AP After receiving the association request frame forwarded by the proxy AP, the 802.lnln AP performs feedback, and the proxy AP receives the association response frame fed back by the 802.1 In the AP.
  • the proxy AP performs format conversion on the association response frame fed back by the 802.11ln AP received in step 306, removes the content related to the 802.11n capability, and the address information does not change, and then sends the second channel to the 802.11b terminal that requests the association. .
  • the second terminal of the proxy performs key negotiation with the access point.
  • the 802.11b terminal and the 802.l ln AP need to perform key negotiation to generate a unicast transmission key and a broadcast transmission key.
  • the key negotiation process has two modes:
  • the proxy AP proxy 802.l ln AP performs 802.Hi key negotiation with the 802.11b terminal:
  • the proxy AP performs key negotiation with the 802.11b terminal on the second channel, performs key negotiation with the 802.11ln AP on the first channel, and uses the key between the corresponding end to negotiate in the key negotiation process. It should be noted that when the proxy AP forwards the 802.11b terminal data on the first channel, it needs to use the four-address format for data transmission, and the proxy AP forwards the 802.11b terminal data to the 802. l ln AP in the four-address format, including 802. l ln AP address, proxy AP address, destination address, and 802.11b terminal address, 802. l lnAP sends 802.11b terminal data to the proxy AP's four address format, including proxy AP address, 802. l ln AP address , 802.11b terminal address and source address.
  • the proxy AP does not participate in the key negotiation between the 802. 1 In AP and the 802.1 lb terminal, and only needs to perform frame format conversion on the frames received from the 802. l lnAP and the 802.11b terminal:
  • the frame content in the first channel 802.l ln AP communication carries content related to the 802.11ln capability
  • the frame content when the second channel communicates with the 802.11b terminal does not carry the content related to the 802.lnln capability.
  • the address information does not change.
  • the proxy AP proxy 802. l ln AP is associated with the 802.11b terminal. 309. Proxy communication between the access point and the second terminal.
  • the proxy AP proxyes the communication between the 802.1 ln AP and the 802.11b terminal by switching the channel, that is, in the first channel, the proxy AP sends its own cached uplink data to the 802.11ln AP, Receiving the downlink data sent by the 802.11ln AP, buffering the downlink data, and transmitting the downlink data to the 802.11b terminal in the second channel, and receiving the uplink data sent by the 802.11b terminal, the uplink data, and the uplink data.
  • the uplink data to be sent is buffered.
  • the proxy AP determines the handover channel and the process of proxy 802. l ln AP and 802.11b terminal communication, which can be divided into the following cases: 1.
  • 802. l ln AP and proxy AP are WLAN-based CSMA/CA competition mechanism communication: If the 802. l ln AP and the proxy AP are WLAN-based CSMA/CA competition mechanism communication, the proxy AP sends data to the 802. l ln AP. In the frame, set the Power Management Field in the Frame Control of the Media Access Control Address (MAC, Media Access Control) to 1, indicating that you want to enter the power saving state, 802.
  • MAC Media Access Control
  • the AP After receiving the data frame, the AP starts to buffer the data packet of the proxy AP. If the proxy AP is in the power saving mode, the 802.1 lnAP carries the proxy AP's cache status in the beacon frame, indicating whether the proxy AP is Need to wake up to receive data. When the proxy AP detects that it does not need to transmit or receive data in the first channel, that is, when it is idle, it can switch to the second channel to communicate with the 802.11b terminal.
  • 802. l ln AP and proxy AP is based on similar time division multiple access (TDMA, Time Division
  • the communication is based on Time Division Multiple Access (TDMA), that is, 802. l ln AP uses a scheduling-based manner to transmit and receive data for each time slot determined by each terminal associated with it, so that the proxy AP can communicate with the 802.11b terminal by switching to the second channel in the preset second-channel transmission and reception time slot.
  • TDMA Time Division Multiple Access
  • the proxy AP does not need to notify the 802. l ln AP to enter the power saving state, and only needs to switch back to the first channel when the sending and receiving time slots belonging to the first channel are reached.
  • the proxy AP After the proxy AP enters the power-saving state on the first channel, it switches to the second channel to send a data frame or control frame to the 802.1 lb terminal, and cancels the silent state of the 802.1 lb terminal. It should be noted that due to 802.1 lb The terminal may switch the channel because the proxy AP is not detected for a long time. Therefore, when the proxy AP performs data exchange with the 802. l lnAP on the first channel, the 802.11b terminal must remain in a silent state, and the data frame or control frame sent by the proxy AP is required.
  • the value of the Duration parameter is the duration that the proxy AP will stay on the second channel, that is, the duration that the proxy AP will complete the data transmission on the second channel, and the 802.11b terminal modifies the local according to the value of the duration.
  • the network allocation vector (NAV, Network Allocation Vector) has a value of 0. Only when the NAV value is 0, the 802.11b terminal can send data to the proxy AP, and the proxy AP caches the data. At this time, the proxy AP goes to 802.11b. The terminal sends the downlink data buffered on the first channel, and receives the uplink data sent by the 802.11b terminal, and the proxy AP also buffers the data that is to be sent to the 802. l ln AP, in the process of sending and receiving data, the frame The format does not have content related to 802. l ln capabilities.
  • the proxy AP When the proxy AP is working on the second channel, if the 802.l ln AP and the proxy AP are WLAN-based CSMA/CA competition mechanism communication, when each listening interval (Listening Interval) comes, the proxy AP is from the second The channel is switched to the first channel to read the beacon frame periodically broadcasted by the 802.1 ln AP, and it is confirmed whether the 802.l ln AP has the cache data of the proxy AP itself. If there is cached data, the proxy AP is on the first channel. 802.
  • the proxy AP communicates, if there is no cached data, it switches back to the second channel to continue to communicate with the 802.11b terminal, and the proxy AP can also switch channels according to the situation of the cached data, for example, when the proxy AP needs to send real-time services, According to the real-time service delay and jitter requirement, the frequency of the handover on the first secondary channel and the duration of the stay are determined. If the 802.l ln AP and the proxy AP are in a TDMA-like manner, the proxy AP may belong to the preset A channel transceiver slot is switched to the first channel to communicate with the 802.ln.
  • the method for the proxy AP to determine the handover of the channel may be different depending on the network and the specific situation.
  • the specific switching conditions are not specifically limited herein.
  • the proxy AP When the proxy AP decides to switch back to the first channel to communicate with the 802.1 ln AP, it sends a data frame or a control frame to the 802.1 lb terminal on the second channel, where the duration value of the proxy AP will be scheduled to stay on the first channel.
  • the duration of time that is, the length of time that the proxy AP will complete the data transmission on the first channel
  • the 802.11b terminal modifies the local NAV value according to the value of the duration, and keeps the silent state during the operation of the first channel, the secondary channel proxy.
  • the AP switches to the first channel to start communication with the 802.lnln AP.
  • the proxy AP needs to receive and transmit its own data, and also needs to proxy the 802.11b terminal to communicate with the 802.l@AP and forward it.
  • the frame format is to be related to the 802. l ln capability.
  • another embodiment of a method for accessing a wireless local area network service in an embodiment of the present invention includes: 401: Establish an association with an access point in a first channel;
  • step 401 in this embodiment is the same as that of the step 101 in the foregoing embodiment shown in FIG. 1, and details are not described herein again.
  • step 403 it is determined whether the proxy transmits the beacon frame of the access point on the second channel, and if yes, step 403 is performed.
  • the 802.lnln terminal removes the content related to the 802.lnln capability in the received beacon frame of the 802.11n AP according to its own capability or according to the indication of the 802.11ln AP, Broadcast again, the header of the MAC of the beacon frame is degraded to the MAC header format of 802.11 a/b/g, the address information is unchanged, and the Basic Service Set Identifier (BSSID) still uses 802. l The address of the lnAP, then such an 802.ln terminal is called a second channel proxy AP.
  • BSSID Basic Service Set Identifier
  • the foregoing 802.11 ln terminal capability includes the configuration of the 802.11 terminal itself, the power of the terminal itself, the current traffic volume, and other capabilities related to itself, which are not limited herein.
  • the foregoing indication according to the 802.11ln AP includes: when the 802.11n AP finds that the 802.11b terminal attempts to connect to itself, it may send an indication to the 802.11ln terminal, or may perform an interaction process with the 802.lnln terminal. Carrying the indication, or other indication manner, the specific manner is not limited herein.
  • the proxy beacon obtains the first beacon frame obtained when the first channel is associated with the 802.11ln AP, that is, the beacon frame in the HT MAC frame format, and removes the content related to the transmission rate capability to obtain the second beacon frame. , that is, a beacon frame of the Non-HT MAC frame format, and a second beacon frame is broadcast on the second channel.
  • non-HT MAC frame format and the HT MAC frame format are both standard frame formats of 802.11, and the difference between the two is that an HT control parameter is added to the MAC header of the HT frame format, and Non-HT does not.
  • the non-HT MAC frame format is shown in Table 1.
  • the HT MAC frame format is shown in Table 2.
  • the HT format frame uses 802.11 ⁇ multiple-input multiple-output (MIMO, Multiple-Input Multiple-Out-put Technology transmission, and frames in Non-HT format use 802. l la/g orthogonal frequency division It is transmitted by (OFDM, Orthogonal Frequency Division Multiplexing) technology or 802. l ib Direct Sequence Spread Spectrum (DSSS) technology.
  • MIMO multiple-input multiple-output
  • DSSS Direct Sequence Spread Spectrum
  • the service access method in the embodiment of the present invention is described above from the perspective of the proxy AP.
  • the service access method in the embodiment of the present invention is described from the access point side. Referring to FIG. 5, the embodiment of the present invention is described.
  • Another embodiment of the medium service access method includes:
  • the access point first establishes an association with the first terminal in the first channel.
  • the probe request frame is sent on the first channel, and the access point at the first channel first determines whether the proxy AP exists in the first terminal associated with the second terminal.
  • the second terminal uses the passive detection mode to find the WLAN network, the HT beacon frame broadcasted by the access point on the first channel is intercepted, and the Non-HT beacon frame broadcasted by the proxy AP is detected on the second channel, if The second terminal determines to initiate an association request to the access point, and the access point in the first channel first determines whether the first terminal associated with the first terminal has a proxy AP in the second channel, and if there is a proxy AP, step 503 is performed. .
  • the access point rejects the probe request or association request of the unified terminal, or does not respond to the probe request or the association request.
  • the second terminal uses the active detection mode to find the WLAN network
  • the access point rejects or does not respond to the probe request of the second terminal
  • the second terminal switches the channel to continue to send a probe request for active detection.
  • the proxy AP responds.
  • the second terminal decides to close the secondary channel proxy AP.
  • the second terminal uses the passive detection mode to find the WLAN network
  • the access point rejects or does not respond to the association request of the second terminal
  • the proxy AP responds to the probe request, and the second terminal decides to associate with the secondary channel proxy AP.
  • the second terminal sends an association request to the proxy AP.
  • the proxy AP converts the frame into an HT format association request, and the address information is the same as the Non-HT association request sent by the second terminal, and then sent to the first
  • the access point in the channel performs an association response when the access point receives the association request of the second terminal forwarded by the proxy AP.
  • an embodiment of the user terminal in the embodiment of the present invention includes:
  • a first association unit 601 configured to establish an association with the access point on the first channel, and establish an association between the access point and the second terminal in the second channel proxy;
  • the proxy communication unit 602 is configured to proxy communication between the access point and the second terminal when the preset condition is met.
  • the proxy communication unit 602 in this embodiment may further include: a sending unit 6021, configured to send the buffered uplink data to the access point on the first channel, and convert the data format into a content format related to carrying the transmission rate capability.
  • the subsequent association request frame is sent to the access point, and the buffered downlink data is sent to the second terminal on the second channel, and the data frame or the control frame is sent to the second terminal, and the feedback detection response is sent and the transmission transmission rate removal capability is related.
  • the association response frame after the content is given to the second terminal;
  • the receiving unit 6022 is configured to receive downlink data sent by the access point on the first channel, buffer downlink data sent by the access point to the second terminal, receive an association response frame fed back by the access point, and receive the second channel. Upgoing data sent by the second terminal, and buffering the uplink data sent by the second terminal and the uplink data to be sent by the second terminal, receiving the probe request sent by the second terminal, and receiving the association request frame sent by the second terminal on the second channel;
  • the converting unit 6023 is configured to convert the format of the association request frame into a format carrying the transmission rate capability related content on the first channel, and remove the association response frame with the transmission rate capability related content on the second channel;
  • the switching unit 6024 is configured to switch from the first channel to the second channel when the first switching condition is met, and switch from the second channel to the first channel when the second switching condition is met.
  • the user terminal in this embodiment may further include:
  • the determining unit 6025 is configured to determine, according to the situation of the self or the indication of the access point, whether to send the beacon frame of the access point on the second channel.
  • the key agreement unit 6026 is configured to negotiate with the second terminal a second key required for data transmission on the second channel, and negotiate with the access point for the first key required for data transmission on the first channel.
  • the first association unit 601 first establishes an association with the access point on one channel, and establishes an association manner. Specifically, the first terminal sends an association request to the access point, and the access point sends the feedback information to the first A terminal, indicating consent to association, association establishment, it should be noted that there may be other ways to establish an association, and the specific establishment manner is related to the application process, and is not specifically limited herein.
  • the first association unit 601 proxyes the access point to associate with the second terminal on another independent channel.
  • the first association unit 601 can associate with the access point on the first channel, and The proxy access point of the access point is associated with the second terminal.
  • the proxy communication unit 602 can proxy the access point to communicate with the second terminal.
  • the process of the proxy communication unit 602 in the specific proxy communication may be the same as the step 309 in the foregoing embodiment shown in FIG. 3, and details are not described herein again.
  • the first association unit 601 first establishes an association with the access point on the first channel, and then associates the access point with the second terminal in the second channel proxy, and the proxy communication unit 602 is in the first
  • the channel is switched between the channel and the second channel, and the access point of the first channel is communicated with the second terminal of the second channel, so that on the premise of network compatibility, the cost is ensured without increasing the cost. Will reduce the network throughput of high transmission rate access points.
  • the service access point in the embodiment of the present invention includes:
  • a second association unit 701 configured to establish an association with the first terminal
  • the processing unit 702 is configured to: when the first channel receives the probe request or the association request sent by the second terminal, determine whether the first terminal has a proxy access point in the second channel, and if yes, reject the second The probe request or association request of the terminal, or does not respond to the probe request or the association request, and responds to the association request when receiving the association request of the second terminal forwarded by the proxy access point.
  • the indicating unit 703 is configured to instruct the first terminal agent to broadcast the beacon frame.
  • the second association unit 701 first establishes an association with the first terminal in the first channel.
  • the detection request frame is sent on the first channel, and the processing unit 702 of the access point of the first channel first determines whether the proxy AP exists in the first terminal associated with the second terminal.
  • the second terminal uses the passive detection mode to find the WLAN network, the HT beacon frame broadcasted by the access point on the first channel is intercepted, and the Non-HT beacon frame broadcasted by the proxy AP is detected on the second channel, if The second terminal decides to initiate an association request to the access point, and the processing unit 702 of the access point of the first channel first determines whether the first terminal associated with itself has a proxy AP in the second channel.
  • the processing unit 702 rejects the probe request or the association request of the unified terminal, or does not respond to the probe request or the association request.
  • the second terminal uses the active detection mode to find the WLAN network
  • the access point rejects or does not respond to the probe request of the second terminal
  • the second terminal switches the channel to continue to send a probe request for active detection.
  • the proxy AP responds.
  • the probe request determines that the second terminal associates with the secondary channel proxy AP.
  • the second terminal uses the passive detection mode to find the WLAN network
  • the access point rejects or does not respond to the association request of the second terminal
  • the proxy AP responds to the probe request, and the second terminal decides to associate with the secondary channel proxy AP.
  • the second terminal sends an association request to the proxy AP.
  • the proxy AP converts the frame into an HT format association request, and the address information is the same as the Non-HT association request sent by the second terminal, and then sent to the first
  • the access point in the channel performs an association response when the processing unit 702 of the access point receives the association request of the second terminal forwarded by the proxy AP.
  • a service access system is also provided in the embodiment of the present invention. For details, refer to FIG. 8.
  • the service access system includes:
  • the first terminal 801 is configured to establish an association with the access point 802 on the first channel, and establish an association between the access point 802 and the second terminal 803 in the second channel proxy, and proxy the access point when the preset condition is met.
  • the access point 802 is configured to establish an association with the first terminal 801 on the first channel, and the first terminal 801 is in communication with the second terminal 803;
  • the second terminal 803 is configured to establish an association with the first terminal 801 on the second channel, and the first terminal 801 proxy communicates with the access point 802.
  • the first terminal 801 first establishes an association with the access point 802 on one channel, and establishes an association manner. Specifically, the first terminal 801 sends an association request to the access point 802, and the access point 802 sends a feedback. The information is sent to the first terminal 801, indicating that the association is established, and the association is established. It should be noted that there are other ways to establish the association.
  • the specific establishment manner is related to the application process, and is not specifically limited herein.
  • first channel in this embodiment may be a primary channel
  • second channel may be a secondary channel
  • the access point 802 can be an 802. l ln AP
  • the first terminal 801 can be an 802. l ln terminal
  • the second terminal 803 can be an 802.11b terminal. It can be understood that, in practical applications, The entry point 802, the first terminal 801, and the second terminal 803 are also other types of devices, which are not limited herein.
  • the second terminal 803 searches for the WLAN network, if the active detection mode is adopted, the second terminal 803 sends a Probe Request frame on the first channel, and the access point 802 first determines the first terminal 801 associated with the access point 802. Whether there is a terminal that performs the proxy function, the specific judgment process is the same as the judgment process described in the foregoing embodiment shown in FIG. 3, and details are not described herein again.
  • the access point 802 rejects or does not respond to the association request of the second terminal 803, and the second terminal 803 switches to the second channel to continue transmitting the probe request frame, and then the first terminal 801 that performs the proxy function The probe request sent by the second terminal 803 is received.
  • the first terminal 801 responds to the probe request and feeds back the response to the second terminal 803.
  • the second terminal 803 determines to associate with the first terminal 801 in the second channel, and then A terminal 801 transmits an association request frame, and the first terminal 801 receives an association request frame sent by the second terminal 803.
  • the first terminal 801 may convert the association request frame into a format and send it to the access point 802 on the first channel, and the converted frame format carries 802.l ln capability related content, the address information does not change, before conversion and conversion
  • the specific frame format is the same as that described in the foregoing embodiment shown in FIG. 3, and details are not described herein again.
  • the access point 802 After receiving the association request frame forwarded by the first terminal 801, the access point 802 performs feedback, and the first terminal 801 receives the association response frame fed back by the access point 802.
  • the first terminal 801 converts the received association response frame fed back by the access point 802 into a format, removes the content related to the 802.11n capability, and the address information does not change, and then sends the second channel to the second terminal 803 that requests the association.
  • the second terminal 803 and the access point 802 need to perform key agreement to generate a unicast transmission key and a broadcast transmission key.
  • the key negotiation process is the same as that described in step 308 in the foregoing embodiment shown in FIG. No longer.
  • the first terminal 801 proxyes the communication between the access point 802 and the second terminal 803 by switching channels, that is, in the first channel, the first terminal 801 sends its own cache to the access point 802. Uplink data, receiving the downlink data sent by the access point 802, buffering the downlink data, and transmitting the downlink data to the second terminal 803 in the second channel, and receiving the uplink data sent by the second terminal 803, The uplink data and the uplink data to be sent by itself are buffered.
  • the method for determining the handover channel by the first terminal 801 and the process of communicating the access point 802 and the second terminal 803 with the foregoing embodiment shown in FIG. The content described in the same is the same and will not be described here.
  • the first terminal 801 first establishes an association with the access point 802 on the first channel, and then associates the access point 802 with the second terminal 803 in the second channel, and the proxy communication unit 602 Switching between the first channel and the second channel, the access point 802 of the first channel and the second terminal 803 of the second channel communicate, so that on the premise of network compatibility, without increasing the cost, It effectively guarantees that the network throughput of high transmission rate access points will not be reduced.

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Description

一种无线局域网的业务接入方法、 设备及系统 本申请要求于 2010年 8月 20日提交中国专利局、申请号为 201010261150.X、 发明名称为 "一种无线局域网的业务接入方法、设备及系统,,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
本发明涉及无线通信领域, 尤其涉及一种无线局域网的业务接入方法、 设 备及系统。
背景技木
无线局域网 ( WLAN, Wireless Local Area Networks )技术因其在无线化优 势, 可比拟有线的高速率接入, 以及成本低廉的特点而深受市场的欢迎。 目前, WLAN技术已经开始取代有线局域网广泛应用于家庭、 校园、 酒店、 企业办公 等场合, 并开始作为一种无线宽带接入技术广泛部署于公众热点地地区, 提供 公众无线宽带数据接入服务。
无线局域网通用的标准 IEEE 802. 11, 是由美国电气和电子工程师协会 ( IEEE, The Institute of Electrical and Electronics Engineers )所定义的无线网各 通信的标准, IEEE 802. 11定义的 WLAN系统的标准包括 802. l ib, 802. 11a, 802. l lg和 802. l ln多种制式,各种制式支持的最大空口速率差别较大, 802. l ib 的最大空口速率通常为 11Mbps, 802. l lg的最大空口速率通常为 54Mbps, 新发 布的 802. l ln支持的最大空口速率通常为 600Mbps。 WLAN网络在制定新标准 时,都需要考虑后向兼容性,新制定的标准必须支持旧制定的标准,例如 802. l ln 接入点 (AP, Access Point ) (相当于移动网络的基站) 需要同时支持传统 802. l la/b/g终端设备(STA, Station ) 的接入, 802. l ln支持的最大空口速率是 传统终端的十到几十倍,则当 802. l lnAP同时接入 802. l ln终端和传统终端时, 由于 WLAN系统使用有沖突避免的载波侦听多路访问( CSMA/CA, Carrier Sense Multiple Access with Collision Avoidance )机制竟争信道, 并传输数据, 而两种终 端竟争到信道的机会一样, 当传统终端竟争到信道发送数据时, 由于空口速率 低, 会使用较长的时间来发送相同大小的数据, 这样会严重降低网络的吞吐量, 使得 802. 11η在此种组网方式下不能充分发挥其高吞吐量的优势。 为避免在 802. llnAP同时接入 802. 1 In STA和传统终端时严重降低网络的吞吐量。
在现有技术中, 通常在 802. llnSTA和传统终端接入 WLAN过程中采用如 下方式:
在 802. llnAP上配置多个射频卡,不同的射频卡分别用于接入不同的终端, 即分别用于接入 802. 1 In STA和接入传统终端, 并且工作在不同信道上, 使得 传统终端不影响 802. l ln STA所在信道的系统吞吐量。
由于需要 802.11η ΑΡ配置多个射频卡, 这种配置多个射频卡的方法增加了 802. llnAP的成本。
发明内容
本发明实施例提供了一种能够不增加成本, 并且在保证网络兼容的前提下 不降低高传输速率接入点的网络吞吐量的方法、 设备及系统。
本发明实施例提供的无线局域网的业务接入方法, 包括: 第一终端在第一 信道与接入点建立关联; 第一终端在第二信道代理所述接入点与第二终端建立 关联; 当满足预置条件时, 第一终端代理所述接入点和所述第二终端之间的通 信; 所述第一终端的数据传输速率高于所述第二终端的数据传输速率。
本发明实施例提供的无线局域网的业务接入方法, 包括: 与第一终端建立 关联; 当在第一信道接收到第二终端发送的探测请求或关联请求时, 判断所述 第一终端在第二信道中是否存在代理接入点, 若存在, 则拒绝所述第二终端的 探测请求或关联请求, 或者不对所述探测请求或关联请求进行响应; 当接收到 所述代理接入点转发的所述第二终端的关联请求时, 响应所述代理接入点转发 的关联请求; 所述第一终端的数据传输速率高于所述第二终端的传输速率。
本发明实施例提供的一种用户终端, 包括: 第一关联单元, 用于在第一信 道与接入点建立关联以及在第二信道代理所述接入点与第二终端建立关联; 代 理通信单元, 用于当满足预置条件时, 代理所述接入点和所述第二终端之间的 通信。
本发明实施例提供的一种业务接入点, 包括: 第二关联单元, 用于与第一 终端建立关联; 处理单元, 用于当在第一信道接收到第二终端发送的探测请求 或关联请求时, 判断所述第一终端在第二信道中是否存在代理接入点, 若存在, 则拒绝所述第二终端的探测请求或关联请求, 或者不对所述探测请求或关联请 求进行响应, 以及, 当接收到所述代理接入点转发的所述第二终端的关联请求 时, 响应所述关联请求。
本发明实施例提供的一种业务接入系统, 包括: 第一终端, 用于在第一信 道与接入点建立关联, 在第二信道代理所述接入点与第二终端建立关联, 当满 足预置条件时, 代理所述接入点和所述第二终端之间的通信; 接入点, 用于在 第一信道与第一终端建立关联, 由所述第一终端代理与第二终端进行通信; 第 二终端, 用于在第二信道与第一终端建立关联, 由所述第一终端代理与接入点 进行通信。
从以上技术方案可以看出, 本发明实施例具有以下优点:
本发明实施例提供的技术方案中, 第一终端首先在第一信道与接入点建立 关联, 然后在第二信道代理该接入点与第二终端建立关联, 在第一信道和第二 信道之间切换信道, 代理第一信道的接入点和第二信道的第二终端进行通信, 从而在不增加成本的基础上, 在网络兼容的前提下, 有效保证了不会降低高传 输速率接入点的网络吞吐量。
附图说明
图 1为本发明实施例中无线局域网的业务接入方法一个实施例示意图; 图 2为本发明实施例中无线局域网终端与接入点通信方式示意图; 图 3为本发明实施例中无线局域网的业务接入方法另一个实施例示意图; 图 4为本发明实施例中无线局域网的业务接入方法另一个实施例示意图; 图 5为本发明实施例中无线局域网的业务接入方法另一个实施例示意图; 图 6为本发明实施例中用户终端一个实施例示意图;
图 7为本发明实施例中业务接入点一个实施例示意图;
图 8为本发明实施例中业务接入系统一个实施例示意图。
具体实施例 本发明实施例提供了一种无线局域网的业务接入方法, 使得高传输速率终 端具有代理功能, 代理分别处于第一信道和第二信道的高传输速率接入点和传 统终端进行通信, 用于在不增加成本的基础上, 保证网络兼容的前提下不降低 高传输速率接入点的网络吞吐量的方法、 设备以及系统。 以下分别进行详细说 明。 请参阅图 1, 本发明实施例中无线局域网的业务接入方法的一个实施例包 括:
101、 第一终端在第一信道与接入点建立关联;
本实施例中, 第一终端首先在一个信道上与接入点建立关联, 建立关联的 方式, 可以由第一终端向接入点发送关联请求, 该接入点发送反馈信息给第一 终端, 表示同意关联, 关联建立, 需要说明的是, 建立关联也可以有其他方式, 具体建立方式与应用过程有关, 此处不作具体限定。
102、 第一终端在第二信道代理该接入点与第二终端建立关联;
与该接入点建立了关联之后, 第一终端在另外的独立信道上代理该接入点 与第二终端建立关联。
一般来说, 有多个信道使得第一终端在不同信道上进行数据收发, 本实施 例中, 第一终端可以在第一信道上与接入点建立关联, 并在第二信道上作为该 接入点的代理接入点与第二终端建立关联, 进行数据收发, 第一终端的数据传 输速率高于第二终端的数据传输速率。
103、 第一终端代理该接入点和第二终端的通信。
完成上述关联的建立后, 当满足一定预置条件时, 第一终端可以代理该接 入点与第二终端进行通信, 本实施例中需要满足的预置条件将在后续的实施例 中进一步说明。
本实施例中, 首先, 第一终端在第一信道中与接入点建立关联, 然后, 在 第二信道中作为该接入点的代理接入点与第二终端建立关联, 当满足一定的预 置条件时, 第一终端可以代理该接入点与第二终端进行通信, 即接入点与第二 终端的通信均由第一终端代理完成, 因而在保证网络兼容的前提下实现保持高 传输速率网络的吞吐量, 并且不会因额外加入设备而增加成本。
为便于理解, 下面介绍在无线局域网络中, 各终端与各接入点使用互通链 路进行互通时的具体互通方式, 请参阅图 2:
第一终端 202可以为 802. l ln终端, 第二终端 203可以为 802. l lg终端或 802. l ib终端, 接入点 201可以为 802. 11η ΑΡ。
第一终端 202在信道 1 (称为主信道)上与接入点 201连接, 该第一终端 202在信道 6 (称为辅信道)上与第二终端 203连接。
第一终端 202将第二终端 203的数据转发给接入点 201, 并且将接入点 201 的数据转发给第二终端 203, 其中, 第二终端 203与第一终端 201相比, 数据传 输速率较低。
为便于理解, 下面以另一实施例对本发明实施例中无线局域网业务接入的 流程进行详细描述,请参阅图 3, 本发明实施例中无线局域网业务接入方法另一 实施例包括:
301、 在第一信道与接入点建立关联;
本实施例中的步骤 301的内容与前述图 1所示实施例中步骤 101的内容相 同, 此处不再赘述。
需要说明的是, 本实施例中的第一信道可以为主信道, 第二信道可以为辅 信道。
本实施例中, 将 802. 1 In AP作为接入点, 将 802. 1 In终端作为第一终端, 将 802.11b终端作为第二终端, 可以理解的是, 在实际应用中, 接入点, 第一终 端, 第二终端同样还可以是其他类型的设备, 具体此处不做限定。
302、 在第二信道接收第二终端发送的探测请求;
802.1 lb终端寻找 WLAN网络时, 如果采用主动探测方式, 该 802.1 lb终端 会在第一信道发送探测请求 (Probe Request ) 帧, 802. 11η AP 首先判断与 802. llnAP关联的 802. 1 In终端中是否存在执行代理功能的终端。
需要说明的是, 802. lln AP在与 802. 1 In终端建立关联时, 会发送识别标 识给该 802. lln终端, 那么, 802. lln AP对 802. 1 In终端进行扫描, 当能够扫 描到识别标志时, 便可判断出在 802. lln终端中存在执行代理功能的终端。
如果存在执行代理功能的终端, 则 802. lln AP拒绝或者不响应 802.11b终 端的关联请求, 802.1 lb终端会切换到第二信道继续发送探测请求帧, 则执行代 理功能的 802. lln终端 (即代理 AP )接收该 802.11b终端发送的探测请求。
303、 在第二信道向第二终端反馈探测响应;
在第二信道中, 代理 AP接收 802.11b终端发送来的探测请求后, 响应该探 测请求, 并将响应反馈给该 802.1 lb终端。
304、 在第二信道接收第二终端发送的关联请求帧;
此时, 802.11b终端决定与第二信道中的代理 AP进行关联, 则向代理 AP (即 802. lln终端)发送关联请求帧, 代理 AP接收 802.11b终端发送的关联请 求帧。 305、 转换关联请求帧格式并在第一信道发送给接入点;
在 304步骤里接收 802.1 lb终端发送的关联请求帧, 代理 AP要将该关联请 求帧转换格式后,在第一信道发送给 802. l ln AP,转换后的帧格式带有 802. l ln 能力相关的内容, 地址信息不变, 转换前和转换后具体的帧格式将在后续实施 例中进行详细说明。
306、 在第一信道接收接入点反馈的关联响应帧;
在第一信道中, 802. l ln AP接收到代理 AP转发的关联请求帧后, 进行反 馈, 代理 AP接收 802. 1 In AP反馈的关联响应帧,
307、 转换关联响应帧格式并在第二信道发送给第二终端;
代理 AP将步骤 306中接收的 802. l ln AP反馈的关联响应帧进行格式转化, 去除与 802. 11η能力相关的内容, 地址信息不变, 然后在第二信道发送给请求 关联的 802.11b终端。
308、 代理第二终端与接入点进行密钥协商;
802.11b终端与 802. l ln AP需要进行密钥协商,生成单播传输密钥和广播传 输密钥, 密钥协商过程有两种方式:
一、 代理的方式:
如图 3所示的步骤 308中, 代理 AP代理 802. l ln AP与 802.11b终端进行 802. Hi密钥协商:
该代理 AP在第二信道与 802.11b终端进行密钥协商,在第一信道与 802. l ln AP进行密钥协商, 在密钥协商过程中分别使用与对应端之间的密钥进行协商, 需要说明的是, 当代理 AP在第一信道转发 802.11b终端数据时, 需要使用四地 址格式进行数据传输, 代理 AP转发 802.11b终端数据给 802. l ln AP的时的四 地址格式中, 包括 802. l ln AP地址, 代理 AP地址, 目的地址, 和 802.11b终 端地址, 802. l lnAP将 802.11b终端数据发给代理 AP的四地址格式中, 包括代 理 AP地址, 802. l ln AP地址, 802.11b终端地址和源地址。
二、 透传的方式:
代理 AP不参加 802. 1 In AP和 802.1 lb终端之间进行的密钥协商, 只需将 从 802. l lnAP和从 802.11b终端收到的帧进行帧格式转换:
即在第一信道 802. l ln AP通信时的帧内容携带与 802. l ln能力有关的内容, 在第二信道与 802.11b终端通信时的帧内容不携带与 802. l ln能力有关的内容, 且地址信息不变。
经过密钥协商后, 代理 AP便代理 802. l ln AP与 802.11b终端建立了关联。 309、 代理该接入点和第二终端之间通信。
本实施例中, 代理 AP通过切换信道来代理 802. l ln AP和 802.11b终端之 间的通信, 即在第一信道中, 代理 AP向 802. l ln AP发送其自身緩存的上行数 据, 同时接收该 802. l ln AP发送的下行数据, 对该下行数据进行緩存, 并在第 二信道中向 802.11b终端发送该下行数据, 同时接收 802.11b终端发送的上行数 据, 对该上行数据以及自身待发送的上行数据进行緩存。
基于 802. l ln AP与代理 AP之间的通信机制, 代理 AP对切换信道的判断 方法以及代理 802. l ln AP和 802.11b终端通信的过程,可以分为以下几种情况: 一、 802. l ln AP与代理 AP是基于 WLAN的 CSMA/CA竟争机制通信: 若 802. l ln AP与代理 AP是基于 WLAN的 CSMA/CA竟争机制通信, 则 代理 AP向 802. l ln AP发送数据帧时,将介质访问控制地址( MAC, Media Access Control ) 头部的帧控制 ( Frame Control ) 中的电源管理控制字段 ( Power Management Field )设置为 1, 表示要进入省电状态, 802. l ln AP接收到该数据 帧后, 开始緩存代理 AP 的数据报文, 如果在该代理 AP处于省电模式阶段, 802. l lnAP会在信标帧中携带此代理 AP的緩存情况,指示代理 AP是否需要醒 来接收数据。 当代理 AP检测到其自身在第一信道中没有发送或接受数据的需 求, 即处于闲置状态时, 可以切换到第二信道与 802.11b终端通信。
二、 802. l ln AP与代理 AP是基于类似时分多址接入( TDMA, Time Division
Multiple Access ) 的方式通信:
需要说明的是, 若 802. l ln AP与代理 AP不是基于 WLAN的 CSMA/CA 竟争机制通信, 而是基于类似时分多址接入 ( TDMA, Time Division Multiple Access ) 的方式通信, 即 802. l ln AP采用基于调度的方式为每个与其关联的终 端分别确定的时隙收发数据,这样代理 AP可以在预置的属于第二信道收发时隙 切换到第二信道上与 802.11b终端通信,而且,当从第一信道切换到第二信道时, 代理 AP不需要通知 802. l ln AP进入省电状态, 只需要在到达属于第一信道的 收发时隙切换回第一信道即可。
代理 AP在第一信道上进入省电状态后,切换到第二信道上发送数据帧或控 制帧给 802.1 lb终端,取消 802.1 lb终端的静默状态,需要说明的是,由于 802.1 lb 终端可能会因为长时间探测不到代理 AP而切换信道, 所以代理 AP在第一信道 与 802. l lnAP进行数据交换时, 802.11b终端必须保持静默状态, 而代理 AP发 送的数据帧或控制帧中的持续时间 (Duration )参数的值为该代理 AP将在第二 信道计划停留的时长, 即代理 AP 将在第二信道完成本次数据传输的时长, 802.11b 终端根据该 duration 的值修改本地网络分配矢量 (NAV, Network Allocation Vector )值为 0, 只有当 NAV值为 0时, 802.11b终端才可以发送数据 给代理 AP, 由该代理 AP对数据进行緩存, 此时, 代理 AP向 802.11b终端发送 在第一信道时緩存的下行数据, 并接收 802.11b终端发送的上行数据, 代理 AP 还会将自身将要发送给 802. l ln AP的数据进行緩存,在发送和接收数据过程中, 帧格式不带有 802. l ln能力相关的内容。
代理 AP在第二信道工作时, 若 802. l ln AP与代理 AP是基于 WLAN的 CSMA/CA竟争机制通信, 则当每个侦听间隔 (Listening Interval )到来时, 代 理 AP便从第二信道切换到第一信道读取 802. l ln AP周期性广播的信标帧, 确 认该 802. l ln AP是否有代理 AP 自身的緩存数据, 如果有緩存数据, 代理 AP 则在第一信道与 802. l lnAP进行通信, 如果没有緩存数据, 则切回到第二信道 继续与 802.11b终端通信, 代理 AP也可以根据自身緩存数据的情况切换信道, 如当代理 AP需要发送实时业务时, 可以根据实时业务时延和抖动需求, 决定在 第一辅信道上切换的频率及停留的时长, 若 802. l ln AP与代理 AP是基于类似 TDMA的方式通信, 代理 AP可以在预置的属于第一信道收发时隙切换到第一 信道上与 802. l lnAP通信。
可以理解的是,代理 AP决定切换信道的方法会因网络和具体情况的不同而 不同, 具体切换条件, 此处不作具体限定。
当代理 AP决定要切换回第一信道与 802. l ln AP通信, 则在第二信道发送 数据帧或者控制帧给 802.1 lb终端, 该帧中 duration值为代理 AP将在第一信道 上计划停留的时长,即代理 AP将在第一信道完成本次数据传输的时长, 802.11b 终端根据该 duration的值修改本地 NAV值为 1,在代理 AP在第一信道工作期间 保持静默状态, 辅信道代理 AP切换到第一信道与 802. l ln AP开始进行通信, 在此期间, 代理 AP除了可以接收和发送自身的数据之外, 还需要代理 802.11b 终端与 802. l ln AP通信, 并进行转发, 在与 802. l ln AP进行通信过程中, 帧格 式要带有 802. l ln能力相关的内容。 以上实施例中描述的是当 802.11b终端采用主动探测方式寻找 WLAN网络 时, 无线局域网业务的接入方法, 下面对 802.11b 终端采用被动探测方式寻找 WLAN网络时无线局域网业务的接入方法进行说明。
请参阅图 4, 本发明实施例中无线局域网业务接入方法另一实施例包括: 401、 在第一信道与接入点建立关联;
本实施例中的步骤 401的内容与前述图 1所示实施例中步骤 101的内容相 同, 此处不再赘述。
402、 判断是否在第二信道上代理发送接入点的信标帧;
根据自身情况或接入点的指示, 判断是否在第二信道上代理发送该接入点 的信标帧, 若是, 执行步骤 403。
需要说明的是,如果 802. l ln终端根据自身能力或根据 802. l ln AP的指示, 将接收到的 802. l ln AP的信标帧中与 802. l ln能力相关的内容去除后, 再广播 出去, 即将信标帧的 MAC的头部退化为 802. 11 a/b/g的 MAC头部格式, 地址 信息不变, 基本服务集标识符(BSSID, Basic Service Set Identifier)仍然使用 802. l lnAP的地址, 那么此类 802. l ln终端称为第二信道代理 AP。
需要进一步说明的是, 前述 802. l ln终端自身能力包括该 802. l ln终端自 身的配置, 自身的电量, 当前业务量大小, 还可以是其他与其自身相关的能力, 具体此处不做限定, 前述根据 802. l ln AP 的指示包括当 802. l ln AP发现有 802.11b终端试图连接自身时,可以发送指示给 802. l ln终端,或者在与 802. l ln 终端关联交互过程中可以携带该指示, 或者是其他指示方式, 具体方式此处不 作限定。
403、 转换信标帧格式并在第二信道广播;
代理 AP将在第一信道与 802. l ln AP建立关联时获取到的第一信标帧, 即 HT MAC帧格式的信标帧, 去除与传输速率能力相关的内容后得到第二信标帧, 即 Non-HT MAC帧格式的信标帧, 并在第二信道广播第二信标帧。
需要说明的是, non-HT MAC帧格式和 HT MAC帧格式都是 802. 11的标准 帧格式, 两者的区别在于 HT帧格式的 MAC头部增加了一个 HT Control参数, 而 Non-HT没有, non-HT MAC帧格式如表 1所示, HT MAC帧格式如表 2所示, 另外, HT格式的帧会使用 802. 11η 的多输入多输出 (MIMO, Multiple-Input Multiple-Out-put )技术发送, 而 Non-HT格式的帧使用 802. l la/g的正交频分复 用 ( OFDM, Orthogonal Frequency Division Multiplexing )技术或者 802. l ib的 直接序列扩频 ( DSSS, Direct Sequence Spread Spectrum )技术发送。
表 1 non-HT MAC 通用帧格式
Figure imgf000012_0001
MAC 通用帧格式
Figure imgf000012_0002
404-409的内容与前述图 1所示实施例中步骤 304〜309的内容相同,此处不 再赘述。
上面是从代理 AP侧的角度对本发明实施例中的业务接入方法进行了描述, 下面从接入点侧对本发明实施例中的业务接入方法进行描述,请参阅图 5, 本发 明实施例中业务接入方法另一实施例包括:
501、 与第一终端建立关联;
接入点首先要在第一信道中与第一终端建立关联。
502、 判断第一终端中是否存在代理接入点;
第二终端如果采用主动探测方式寻找 WLAN网络, 则在第一信道发送探测 请求帧, 处在第一信道的接入点会首先判断与其关联的第一终端中是否存在代 理 AP。
第二终端如果使用被动探测方式寻找 WLAN网络, 则在第一信道侦听接入 点广播的 HT信标帧, 在第二信道侦听到代理 AP广播的 Non-HT信标帧, 如果 此时第二终端决定向接入点发起关联请求, 处在第一信道的接入点会首先判断 与自身关联的第一终端在第二信道中是否存在代理 AP, 若存在代理 AP, 则执 行步骤 503。
503、 拒绝或不响应第二终端相关请求;
若判断出在与自身关联的第一终端中存在代理 AP, 则接入点会拒绝该统终 端的探测请求或关联请求, 或者不对探测请求或关联请求进行响应。
504、 响应代理 AP转发的关联请求。
在第二终端采用主动探测方式寻找 WLAN网络时, 当接入点拒绝或不响应 第二终端的探测请求, 该第二终端会切换信道继续进行发送探测请求进行主动 探测, 此时, 代理 AP响应探测请求, 则第二终端决定与辅信道代理 AP进行关 联。
在第二终端采用被动探测方式寻找 WLAN网络时, 当接入点拒绝或不响应 第二终端的关联请求, 此时, 代理 AP响应探测请求, 则第二终端决定与辅信道 代理 AP进行关联。
第二终端向代理 AP发送关联请求, 代理 AP接收到此关联请求后, 将此帧 转化为 HT格式的关联请求,地址信息与第二终端发送的 Non-HT关联请求相同, 然后发送给第一信道中的接入点,当接入点接收到代理 AP转发的第二终端的关 联请求时, 进行关联响应。
下面对本发明实施例中的用户终端进行描述, 请参阅图 6, 本发明实施例中 的用户终端一个实施例包括:
第一关联单元 601,用于在第一信道与接入点建立关联以及在第二信道代理 该接入点与第二终端建立关联;
代理通信单元 602, 用于当满足预置条件时, 代理该接入点和第二终端之间 的通信。
需要说明的是, 本实施例中的代理通信单元 602还可以进一步包括: 发送单元 6021, 用于在第一信道向接入点发送緩存的上行数据以及将转换 为携有传输速率能力相关内容格式后的关联请求帧发送给该接入点, 在第二信 道向第二终端发送緩存的下行数据, 发送数据帧或控制帧给第二终端, 发送反 馈探测响应以及发送去除携有传输速率能力相关内容后的关联响应帧给第二终 端;
接收单元 6022, 用于在第一信道接收接入点发送的下行数据, 对接入点发 往第二终端的下行数据进行緩存, 接收该接入点反馈的关联响应帧, 第二信道 接收第二终端发送的上行数据并对该第二终端发送的上行数据以及自身待发送 的上行数据进行緩存, 接收第二终端发送的探测请求, 以及在第二信道接收第 二终端发送的关联请求帧;
转换单元 6023, 用于在第一信道将关联请求帧的格式转换为携有传输速率 能力相关内容的格式, 在第二信道将关联响应帧去除携有传输速率能力相关内 容;
切换单元 6024, 用于当满足第一切换条件时从第一信道切换到第二信道, 当满足第二切换条件时从第二信道切换到第一信道。 本实施例中的用户终端还可以进一步包括:
判断单元 6025, 用于根据自身情况或接入点的指示, 判断是否在第二信道 上代理发送该接入点的信标帧;
密钥协商单元 6026, 用于与第二终端协商第二信道上数据传输所需的第二 密钥, 并与接入点协商第一信道上数据传输所需的第一密钥。
为便于理解, 下面以一具体应用场景对本实施例中用户终端内的各单元之 间的联系进行说明:
本实施例中, 第一关联单元 601 首先在一个信道上与接入点建立关联, 建 立关联的方式, 具体可以由第一终端向接入点发送关联请求, 该接入点发送反 馈信息给第一终端, 表示同意关联, 关联建立, 需要说明的是, 建立关联也可 以有其他方式, 具体建立方式与应用过程有关, 此处不作具体限定。
与该接入点建立了关联之后, 第一关联单元 601 在另外的独立信道上代理 该接入点与第二终端建立关联。
一般来说, 有多个信道使得第一终端在不同信道上进行数据收发, 本实施 例中, 第一关联单元 601 可以在第一信道上与接入点建立关联, 并在第二信道 上作为该接入点的代理接入点与第二终端建立关联。
完成上述关联的建立后, 当满足一定预置条件时, 代理通信单元 602 可以 代理该接入点与第二终端进行通信。
需要说明的是, 代理通信单元 602具体代理通信的过程可以与前述图 3所 示的实施例中的步骤 309相同, 具体此处不再赘述。
本发明实施例提供的技术方案中, 第一关联单元 601 首先在第一信道与接 入点建立关联, 然后在第二信道代理该接入点与第二终端建立关联, 代理通信 单元 602在第一信道和第二信道之间切换信道, 代理第一信道的接入点和第二 信道的第二终端进行通信, 从而在不增加成本的基础上, 在网络兼容的前提下, 有效保证了不会降低高传输速率接入点的网络吞吐量。
下面介绍本发明实施例中的业务接入点的另一个实施例,请参阅图 7, 本发 明实施例中的业务接入点包括:
第二关联单元 701, 用于与第一终端建立关联;
处理单元 702,用于当在第一信道接收到第二终端发送的探测请求或关联请 求时, 判断第一终端在第二信道中是否存在代理接入点, 若存在, 则拒绝第二 终端的探测请求或关联请求, 或者不对探测请求或关联请求进行响应, 以及, 当接收到代理接入点转发的第二终端的关联请求时, 响应该关联请求。
本实施例中的业务接入设备还可以进一步包括:
指示单元 703, 用于指示第一终端代理广播信标帧。
为便于理解, 下面以一具体应用场景对本实施例中业务接入点内的各单元 之间的联系进行说明:
第二关联单元 701首先要在第一信道中与第一终端建立关联。
第二终端如果采用主动探测方式寻找 WLAN网络, 则在第一信道发送探测 请求帧, 处在第一信道的接入点的处理单元 702会首先判断与其关联的第一终 端中是否存在代理 AP。
第二终端如果使用被动探测方式寻找 WLAN网络, 则在第一信道侦听接入 点广播的 HT信标帧, 在第二信道侦听到代理 AP广播的 Non-HT信标帧, 如果 此时第二终端决定向接入点发起关联请求, 处在第一信道的接入点的处理单元 702会首先判断与自身关联的第一终端在第二信道中是否存在代理 AP。
若判断出在与自身关联的第一终端中存在代理 AP, 则处理单元 702会拒绝 该统终端的探测请求或关联请求, 或者不对探测请求或关联请求进行响应。
在第二终端采用主动探测方式寻找 WLAN网络时, 当接入点拒绝或不响应 第二终端的探测请求, 该第二终端会切换信道继续进行发送探测请求进行主动 探测, 此时, 代理 AP响应探测请求, 则第二终端决定与辅信道代理 AP进行关 联。
在第二终端采用被动探测方式寻找 WLAN网络时, 当接入点拒绝或不响应 第二终端的关联请求, 此时, 代理 AP响应探测请求, 则第二终端决定与辅信道 代理 AP进行关联。
第二终端向代理 AP发送关联请求, 代理 AP接收到此关联请求后, 将此帧 转化为 HT格式的关联请求,地址信息与第二终端发送的 Non-HT关联请求相同, 然后发送给第一信道中的接入点,当接入点的处理单元 702接收到代理 AP转发 的第二终端的关联倚求时, 进行关联响应。
本发明实施例中还提供了一种业务接入系统, 具体请参阅图 8, 该业务接入 系统包括:
接入点 802, 第一终端 801以及第二终端 803; 其中, 第一终端 801用于在第一信道与接入点 802建立关联, 在第二信道 代理该接入点 802与第二终端 803建立关联, 当满足预置条件时, 代理该接入 点 802和第二终端 803之间的通信;
接入点 802用于在第一信道与第一终端 801建立关联, 由第一终端 801代 理与第二终端 803进行通信;
第二终端 803用于在第二信道与第一终端 801建立关联, 由第一终端 801 代理与接入点 802进行通信。
为便于理解, 下面以一具体应用场景对本实施例中业务接入系统内的各单 元之间的联系进行说明:
本实施例中, 第一终端 801首先在一个信道上与接入点 802建立关联, 建 立关联的方式, 具体可以由第一终端 801向接入点 802发送关联请求, 该接入 点 802发送反馈信息给第一终端 801,表示同意关联,关联建立,需要说明的是, 建立关联也可以有其他方式, 具体建立方式与应用过程有关, 此处不作具体限 定。
需要说明的是, 本实施例中的第一信道可以为主信道, 第二信道可以为辅 信道。
本实施例中,接入点 802可以为 802. l ln AP,第一终端 801可以为 802. l ln 终端, 第二终端 803可以为 802.11b终端, 可以理解的是, 在实际应用中, 接入 点 802, 第一终端 801, 第二终端 803同样还可以是其他类型的设备, 具体此处 不做限定。
第二终端 803寻找 WLAN网络时, 如果采用主动探测方式, 第二终端 803 会在第一信道发送探测请求( Probe Request )帧, 接入点 802首先判断与接入点 802关联的第一终端 801中是否存在执行代理功能的终端,具体的判断过程与前 述图 3所示的实施例中描述的判断过程相同, 此处不再赘述。
如果存在执行代理功能的终端,则接入点 802拒绝或者不响应第二终端 803 的关联请求, 第二终端 803 会切换到第二信道继续发送探测请求帧, 则执行代 理功能的第一终端 801接收第二终端 803发送的探测请求。
在第二信道中, 第一终端 801接收第二终端 803发送来的探测请求后, 响 应该探测请求, 并将响应反馈给该第二终端 803。
此时, 第二终端 803决定与第二信道中的第一终端 801进行关联, 则向第 一终端 801发送关联请求帧, 第一终端 801接收第二终端 803发送的关联请求 帧。
第一终端 801 可以将该关联请求帧转换格式后, 在第一信道发送给接入点 802, 转换后的帧格式带有 802. l ln能力相关的内容, 地址信息不变, 转换前和 转换后具体的帧格式与前述图 3 所示的实施例中描述的格式相同, 此处不再赘 述。
在第一信道中, 接入点 802接收到第一终端 801转发的关联请求帧后, 进 行反馈, 第一终端 801接收接入点 802反馈的关联响应帧,
第一终端 801将接收的接入点 802反馈的关联响应帧进行格式转化, 去除 与 802. 11η 能力相关的内容, 地址信息不变, 然后在第二信道发送给请求关联 的第二终端 803。
第二终端 803与接入点 802需要进行密钥协商, 生成单播传输密钥和广播 传输密钥, 密钥协商过程与前述图 3所示的实施例中步骤 308描述的内容相同, 此处不再赘述。
本实施例中, 第一终端 801通过切换信道来代理该接入点 802和第二终端 803之间的通信, 即在第一信道中, 第一终端 801向接入点 802发送其自身緩存 的上行数据, 同时接收该接入点 802发送的下行数据, 对该下行数据进行緩存, 并在第二信道中向第二终端 803发送该下行数据, 同时接收第二终端 803发送 的上行数据, 对该上行数据以及自身待发送的上行数据进行緩存。
基于接入点 802与第一终端 801之间的通信机制, 第一终端 801对切换信 道的判断方法以及代理该接入点 802和第二终端 803通信的过程与前述图 3所 示的实施例中描述的内容相同, 此处不再赘述。
本发明实施例提供的技术方案中, 第一终端 801 首先在第一信道与接入点 802建立关联, 然后在第二信道代理该接入点 802与第二终端 803建立关联, 代 理通信单元 602在第一信道和第二信道之间切换信道, 代理第一信道的接入点 802和第二信道的第二终端 803进行通信,从而在不增加成本的基础上, 在网络 兼容的前提下, 有效保证了不会降低高传输速率接入点的网络吞吐量。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是 可以通过程序来指令相关的硬件完成, 所述的程序可以存储于一种计算机可读 存储介质中, 上述提到的存储介质可以是只读存储器, 磁盘或光盘等。 以上对本发明所提供的一种无线局域网的业务接入方法、 设备及系统进行 了详细介绍, 对于本领域的一般技术人员, 依据本发明实施例的思想, 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

权利要求书
1、 一种无线局域网的业务接入方法, 其特征在于, 包括:
第一终端在第一信道与接入点建立关联;
第一终端在第二信道代理所述接入点与第二终端建立关联;
当满足预置条件时, 第一终端代理所述接入点和所述第二终端之间的通信; 所述第一终端的数据传输速率高于所述第二终端的数据传输速率。
2、 根据权利要求 1所述的方法, 其特征在于, 所述第一终端在第二信道代 理所述接入点与第二终端建立关联的步骤之前包括:
第一终端在第二信道接收第二终端发送的探测请求, 并在第二信道向所述 第二终端反馈探测响应;
或,
第一终端根据自身情况或所述接入点的指示, 判断是否在第二信道上代理 发送所述接入点的信标帧, 若是, 则将在第一信道与所述接入点建立关联时获 取到的第一信标帧去除与传输速率能力相关的内容后得到第二信标帧, 并在第 二信道广播所述第二信标帧。
3、 根据权利要求 2所述的方法, 其特征在于, 所述第一终端在第二信道代 理所述接入点与第二终端建立关联的步骤包括:
第一终端在第二信道接收第二终端发送的关联请求帧;
第一终端将所述关联请求帧的格式转换为携有传输速率能力相关内容的格 式, 并在第一信道将转换格式后的关联请求帧发送给所述接入点;
第一终端在第一信道接收所述接入点反馈的关联响应帧;
第一终端将所述关联响应帧去除携有传输速率能力相关内容, 并在第二信 道发送给所述第二终端。
4、 根据权利要求 1至 3中任一项所述的方法, 其特征在于, 所述当满足预 置条件时, 第一终端代理所述接入点和所述第二终端之间的通信包括:
当满足第一切换条件时, 第一终端从第一信道切换到第二信道, 代理所述 接入点与第二终端进行通信;
当满足第二切换条件时, 第一终端从第二信道切换到第一信道, 代理第二 终端与接入点进行通信。
5、 根据权利要求 4所述的方法, 其特征在于,
所述第一切换条件包括: 当第一终端检测到自身在第一信道中处于闲置状 态时, 或, 第一终端根据预置的数据收发时隙确定到达第二信道收发时隙时; 所述第二切换条件包括: 当第一终端到达侦听间隔时, 或, 第一终端根据 数据发送情况确定需要切换至第一信道时, 或, 第一终端根据预置的数据收发 时隙确定到达第一信道收发时隙时。
6、 根据权利要求 5所述的方法, 其特征在于, 所述第一终端代理所述接入 点与第二终端进行通信包括:
第一终端在第一信道进入省电状态;
第一终端在第二信道中发送数据帧或控制帧给第二终端, 取消第二终端的 静默状态;
第一终端向第二终端发送緩存的下行数据, 并接收第二终端发送的上行数 据, 对所述第二终端发送的上行数据以及自身待发送的上行数据进行緩存; 所述第一终端代理第二终端与接入点进行通信包括:
第一终端在第二信道中发送数据帧或控制帧给第二终端, 令所述第二终端 保持静默状态, 所述数据帧或控制帧中的持续时间参数的值为在第一信道计划 停留的时间;
在第一信道中, 第一终端向接入点发送緩存的上行数据, 并接收所述接入 点发送的下行数据, 对接入点发往第二终端的下行数据进行緩存。
7、 根据权利要求 3所述的方法, 其特征在于, 所述第一终端将关联响应帧 去除携有传输速率能力相关内容, 并在第二信道发送给所述第二终端之后包括: 第一终端与所述第二终端协商第二信道上数据传输所需的第二密钥, 并与 接入点协商第一信道上数据传输所需的第一密钥;
或,
第一终端透传第二终端与接入点之间协商的密钥。
8、 一种无线局域网的业务接入方法, 其特征在于, 包括:
与第一终端建立关联;
当在第一信道接收到第二终端发送的探测请求或关联请求时, 判断所述第 一终端在第二信道中是否存在代理接入点, 若存在, 则拒绝所述第二终端的探 测请求或关联请求, 或者不对所述探测请求或关联请求进行响应; 当接收到所述代理接入点转发的所述第二终端的关联请求时, 响应所述代 理接入点转发的关联请求;
所述第一终端的数据传输速率高于所述第二终端的传输速率。
9、 一种用户终端, 其特征在于, 包括:
第一关联单元, 用于在第一信道与接入点建立关联以及在第二信道代理所 述接入点与第二终端建立关联;
代理通信单元, 用于当满足预置条件时, 代理所述接入点和所述第二终端 之间的通信。
10、 根据权利要求 9 所述的用户终端, 其特征在于, 所述代理通信单元包 括:
发送单元, 用于在第一信道向接入点发送緩存的上行数据以及将转换为携 有传输速率能力相关内容格式后的关联请求帧发送给所述接入点, 在第二信道 向第二终端发送緩存的下行数据, 发送数据帧或控制帧给第二终端, 发送反馈 探测响应以及发送去除携有传输速率能力相关内容后的关联响应帧给第二终 端;
接收单元, 用于在第一信道接收接入点发送的下行数据, 对接入点发往第 二终端的下行数据进行緩存, 接收所述接入点反馈的关联响应帧, 在第二信道 接收第二终端发送的上行数据并对所述第二终端发送的上行数据以及自身待发 送的上行数据进行緩存, 接收第二终端发送的探测请求, 以及在第二信道接收 第二终端发送的关联请求帧;
转换单元, 用于在第一信道将所述关联请求帧的格式转换为携有传输速率 能力相关内容的格式, 在第二信道将所述关联响应帧去除携有传输速率能力相 关内容;
切换单元, 用于当满足第一切换条件时从第一信道切换到第二信道, 当满 足第二切换条件时从第二信道切换到第一信道。
11、 一种业务接入点, 其特征在于, 包括:
第二关联单元, 用于与第一终端建立关联;
处理单元, 用于当在第一信道接收到第二终端发送的探测请求或关联请求 时, 判断所述第一终端在第二信道中是否存在代理接入点, 若存在, 则拒绝所 述第二终端的探测请求或关联请求, 或者不对所述探测请求或关联请求进行响 应, 以及, 当接收到所述代理接入点转发的所述第二终端的关联请求时, 响应 所述关联请求。
12、 一种业务接入系统, 其特征在于, 包括:
第一终端, 用于在第一信道与接入点建立关联, 在第二信道代理所述接入 点与第二终端建立关联, 当满足预置条件时, 代理所述接入点和所述第二终端 之间的通信;
接入点, 用于在第一信道与第一终端建立关联, 由所述第一终端代理与第 二终端进行通信;
第二终端, 用于在第二信道与第一终端建立关联, 由所述第一终端代理与 接入点进行通信。
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