WO2016004566A1 - 一种无线保真技术的带宽选择方法及接入点ap - Google Patents

一种无线保真技术的带宽选择方法及接入点ap Download PDF

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Publication number
WO2016004566A1
WO2016004566A1 PCT/CN2014/081741 CN2014081741W WO2016004566A1 WO 2016004566 A1 WO2016004566 A1 WO 2016004566A1 CN 2014081741 W CN2014081741 W CN 2014081741W WO 2016004566 A1 WO2016004566 A1 WO 2016004566A1
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Prior art keywords
bandwidth
mcs
sta
transmission
smaller
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PCT/CN2014/081741
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English (en)
French (fr)
Inventor
李建伟
张桂洪
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to US15/322,301 priority Critical patent/US10069593B2/en
Priority to JP2017500974A priority patent/JP6440176B2/ja
Priority to CN201480071712.0A priority patent/CN105900481B/zh
Priority to EP14896990.0A priority patent/EP3148249B1/en
Priority to PCT/CN2014/081741 priority patent/WO2016004566A1/zh
Publication of WO2016004566A1 publication Critical patent/WO2016004566A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Embodiments of the present invention relate to a wireless communication technology, and in particular, to a bandwidth selection method and an access point AP of a wireless fidelity technology. Background technique
  • the WiF i Wireless Fidelity
  • the WiF i is a standard of a wireless local area network, and includes a communication network composed of an AP (Acces Point) and an STA (Sta t ion).
  • the AP is generally referred to as a network bridge or an access point, and is used to allocate network resources of the uplink segment of the AP, such as a WAN (Wide Area Network) or a LAN (Local Area Network), to the downlink segment of the AP, that is, between the AP and the STA. Communications network.
  • the WiFi technology mainly uses a rate adaptive algorithm in the bandwidth selection: the AP obtains the negotiation bandwidth with the STA according to the rate adaptation algorithm, and selects the corresponding MCS from the bandwidth control table according to the negotiation bandwidth with the STA. (Modula t ion and Coding Scheme, modulation and coding strategy).
  • the AP sends the MCS selected in the above process to the STA to implement the selection of the transmission bandwidth.
  • the technical problem to be solved by the embodiments of the present invention is to provide a bandwidth selection method for the wireless fidelity technology and an access point AP, so as to reduce the transmission bandwidth in a scenario where the transmission bandwidth is too high, thereby reducing The power consumption of the AP and STA side devices increases the battery life.
  • an embodiment of the present invention provides a bandwidth selection method for a wireless fidelity technology, where an access point AP acquires a negotiation bandwidth with a STA of a station; the method includes:
  • the AP sends a first modulation and coding policy MCS to the STA, where the first MCS is smaller than the corresponding relationship between the bandwidth and the MCS and the negotiated bandwidth.
  • the MCS is greater than or equal to the MCS corresponding to the transmission upper limit bandwidth in the correspondence between the bandwidth and the MCS.
  • the method further includes:
  • the second MCS is an MCS corresponding to the negotiated bandwidth in the corresponding relationship between the bandwidth and the MCS;
  • the third MCS is an MCS corresponding to the transmission upper limit bandwidth in a correspondence between the bandwidth and the MCS;
  • the AP sends the first modulation and coding policy MCS to the STA, including:
  • the AP sends a first MCS to the STA.
  • the that the AP sends the first MCS to the STA including: the AP is sent to the STA Send a third MCS.
  • the method further includes:
  • the third MCS is an MCS corresponding to the transmission upper limit bandwidth in a correspondence between the bandwidth and the MCS;
  • the STA issues a third MCS.
  • the uplink bandwidth of the STA is obtained based on a transmission bandwidth of the uplink segment of the AP and/or a transmission requirement bandwidth of the STA.
  • the transmission upper bandwidth of the STA is based on a transmission bandwidth of the AP uplink segment and a transmission requirement of the STA Bandwidth acquisition, including:
  • the upper transmission bandwidth of the STA is a bandwidth smaller than the transmission bandwidth of the uplink segment of the AP and the transmission required bandwidth of the STA.
  • the acquiring the transmission bandwidth of the uplink segment of the AP includes:
  • the AP acquires a transmission bandwidth of the uplink segment of the AP based on the resource block size.
  • the AP acquires a transmission required bandwidth of the STA based on the service type.
  • the method further includes:
  • the AP determines whether the MCS corresponding to the upper bandwidth is smaller than the MCS corresponding to the updated negotiation bandwidth, and if yes, updates the first MCS to the STA.
  • the updated first MCS is sent.
  • the updated first MCS is smaller than the MCS corresponding to the updated negotiated bandwidth, and is greater than or equal to the MCS corresponding to the upper transmission bandwidth.
  • an embodiment of the present invention provides an access point AP, including: a transmitter, a receiver, and a processor; the transmitter is connected to the processor, and the receiver is connected to the processor; The receiver is configured to receive a data transmission request of a station STA;
  • the processor is configured to acquire a negotiated bandwidth of the STA, and obtain, after the receiver receives the data transmission request, a transmission upper bandwidth of the STA;
  • the transmitter is configured to: if the processor determines that the upper transmission bandwidth is smaller than the negotiation bandwidth, send a first modulation and coding policy MCS to the STA; where the first MCS is smaller than a bandwidth and an MCS
  • the MCS corresponding to the negotiation bandwidth in the relationship is greater than or equal to the MCS corresponding to the transmission upper limit bandwidth in the correspondence between the bandwidth and the MCS.
  • the processor is further configured to acquire a second MCS according to the negotiated bandwidth, and obtain a third MCS according to the transmission upper bandwidth;
  • the second MCS is The MCS corresponding to the negotiation bandwidth in the corresponding relationship between the bandwidth and the MCS;
  • the third MCS is the MCS corresponding to the transmission upper bandwidth in the correspondence between the bandwidth and the MCS;
  • the transmitter is configured to: if the processor determines that the upper transmission bandwidth is smaller than the negotiated bandwidth, send the first modulation and coding policy MCS to the STA, including:
  • the transmitter is configured to send a first MCS to the STA if the processor determines that the third MCS is smaller than the second MCS.
  • the processor is further configured to acquire a third MCS according to the transmission upper limit bandwidth, where the third MCS is a correspondence between the bandwidth and the MCS The MCS corresponding to the transmission upper limit bandwidth;
  • the sending by the sending, the first modulation and coding policy, the MCS, to the STA, where the transmitter is configured to send a third MCS to the STA.
  • the first to the third possible implementation manner of the second aspect in a fourth possible implementation manner of the second aspect, is obtained.
  • the transmission upper bandwidth of the STA is based on a transmission bandwidth of the AP uplink segment and a transmission requirement of the STA Bandwidth acquisition, including:
  • the upper transmission bandwidth of the STA is a bandwidth smaller than the transmission bandwidth of the uplink segment of the AP and the transmission required bandwidth of the STA.
  • the acquiring the transmission bandwidth of the uplink segment of the AP includes:
  • the processor acquires a transmission bandwidth of the uplink segment of the AP based on the resource block size.
  • the processor acquires a transmission required bandwidth of the STA based on the service type.
  • the receiver and the transmitter are further used Transmitting data based on the first MCS and the STA;
  • the processor is further configured to: if the MCS corresponding to the negotiation bandwidth is updated in the process of transmitting data, determine whether the MCS corresponding to the upper bandwidth of the transmission is smaller than the MCS corresponding to the updated negotiation bandwidth, and if yes, update the first MCS. And notifying the sender to send the updated first MCS to the STA; the updated first MCS is smaller than the MCS corresponding to the updated negotiation bandwidth, and is greater than or equal to the MCS corresponding to the transmission upper limit bandwidth. .
  • an embodiment of the present invention provides an access point AP, including:
  • a first acquiring module configured to acquire a negotiation bandwidth with the STA of the station
  • Receiving a request module configured to receive a data transmission request of the STA
  • a second acquiring module configured to acquire, by the receiving requesting module, the transmission upper limit bandwidth of the STA after receiving the data transmission request
  • a sending module configured to send a first modulation and coding policy MCS to the STA, if the transmission upper limit bandwidth is smaller than the negotiated bandwidth, where the first MCS is smaller than the corresponding relationship between the bandwidth and the MCS
  • the MCS corresponding to the bandwidth of the negotiation is greater than or equal to the MCS corresponding to the transmission upper bandwidth in the correspondence between the bandwidth and the MCS.
  • the method further includes:
  • a third acquiring module configured to acquire a second MCS according to the negotiated bandwidth, where the second MCS is An MCS corresponding to the negotiated bandwidth in the correspondence between the bandwidth and the MCS;
  • a fourth acquiring module configured to acquire a third MCS according to the transmission upper limit bandwidth;
  • the third MCS is an MCS corresponding to the transmission upper limit bandwidth in the correspondence between the bandwidth and the MCS;
  • the sending module is configured to send the first modulation and coding policy MCS to the STA, if the transmission upper limit bandwidth is smaller than the negotiated bandwidth, including:
  • the sending module is configured to send a first MCS to the STA if the third MCS is smaller than the second MCS.
  • the sending, by the sending, the sending, by the sending, the first MCS includes:
  • the sending module is configured to send a third MCS to the STA.
  • the method further includes:
  • a fourth acquiring module configured to acquire a third MCS according to the transmission upper limit bandwidth;
  • the third MCS is an MCS corresponding to the transmission upper limit bandwidth in the correspondence between the bandwidth and the MCS;
  • the sending module is configured to send the first modulation and coding policy MCS to the STA, where the sending module is configured to send a third MCS to the STA.
  • the first to the third possible implementation manners of the third aspect in a fourth possible implementation manner of the third aspect, is obtained.
  • the transmission upper bandwidth of the STA is based on a transmission bandwidth of the uplink segment of the AP and a transmission requirement of the STA Bandwidth acquisition, including:
  • the upper transmission bandwidth of the STA is a bandwidth smaller than the transmission bandwidth of the uplink segment of the AP and the transmission required bandwidth of the STA.
  • the acquiring the transmission bandwidth of the uplink segment of the AP includes:
  • the second obtaining module acquires a resource block size allocated for the uplink segment of the AP
  • the second obtaining module acquires a transmission bandwidth of the uplink segment of the AP based on the resource block size.
  • the second obtaining module acquires a service type of the transmission data from the data transmission request; the second acquisition module acquires a transmission required bandwidth of the STA according to the service type.
  • the AP further includes:
  • a transmission module configured to transmit data based on the first MCS and the STA
  • the determining module is configured to: if the MCS corresponding to the negotiation bandwidth is updated in the process of transmitting data, determine whether the MCS corresponding to the upper bandwidth of the transmission is smaller than the MCS corresponding to the updated negotiation bandwidth, and if yes, update the first MCS and notify the The sending module sends the updated first MCS to the STA.
  • the updated first MCS is smaller than the MCS corresponding to the updated negotiated bandwidth, and is greater than or equal to the MCS corresponding to the upper transmission bandwidth.
  • the embodiment of the present invention when performing bandwidth selection, not only considers the negotiation bandwidth of the access point AP and the station STA, but also considers the transmission upper limit bandwidth of the station STA, and in some scenarios where the transmission bandwidth is too high.
  • the lowering of the transmission coding strategy MCS is implemented according to the transmission upper limit bandwidth of the STA, thereby reducing the transmission bandwidth of the delivery, thereby reducing the power consumption of the access point AP and the STA side device, and increasing the battery life.
  • FIG. 1 is a specific flowchart of a first embodiment of a method according to an embodiment of the present invention
  • FIG. 2 is a specific flowchart of a second embodiment of a method according to an embodiment of the present invention.
  • FIG. 3 is a specific flowchart of a third embodiment of a method according to an embodiment of the present disclosure
  • FIG. 4 is a specific flowchart of a fourth embodiment of a method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a first embodiment of an AP according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a second embodiment of an AP according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a third embodiment of an AP according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a fourth embodiment of an AP according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a fifth embodiment of an AP according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a sixth embodiment of an AP according to an embodiment of the present invention.
  • WiFi technology mainly uses a rate adaptive algorithm (also called autor a te algorithm) in bandwidth selection:
  • a rate adaptive algorithm also called Autor a te algorithm
  • the AP obtains the negotiated bandwidth with the STA according to the rate adaptation algorithm, and selects the corresponding MCS from the bandwidth control table according to the negotiated bandwidth with the STA.
  • the AP will receive the data transmission request of the STA.
  • the AP will send the MCS selected in the above process to the STA to implement the selection of the transmission bandwidth.
  • rate adaptive algorithms Although there are a large number of rate adaptive algorithms, and the input parameters of each rate adaptive algorithm are different, the specific calculation methods are also different, but in general, they are based on the channel quality of APs and STAs, such as RSSI and PSR. , PER, etc. calculate the bandwidth negotiated with the STA.
  • a bandwidth selection method of the WiFi technology and an access point AP are provided to reduce the transmission bandwidth in a scenario where the transmission bandwidth is too high, thereby reducing power consumption of the AP and the STA side device, and increasing Life time.
  • an embodiment of the present invention provides a first embodiment of a bandwidth selection method for a WiFi technology.
  • the AP acquires a negotiated bandwidth with the STA.
  • the AP when the AP negotiates the bandwidth with the STA, the AP may first establish a path with the STA, or when the channel condition between the AP and the STA changes, for example, when the STA moves.
  • the AP may specifically obtain a negotiation bandwidth with the STA according to the rate adaptation algorithm.
  • the rate adaptation algorithm is an algorithm for obtaining the negotiation bandwidth between the AP and the STA in the prior art.
  • the AP first obtains the channel quality between the AP and the STA, for example, parameters such as RSSI, PSR, and PER. Then, according to the obtained channel quality, the negotiation bandwidth of the AP and the STA is calculated by using any rate adaptive algorithm.
  • S101 The AP receives a data transmission request of the STA.
  • the AP receives the data transmission request of the STA.
  • the request may be sent by the STA.
  • the STA sends a data transmission request to the AP.
  • the request may also be sent by the uplink end of the AP, for example, the WAN side or the LAN side.
  • the STA's data transmission request is sent to the AP.
  • the AP acquires a transmission upper limit bandwidth of the STA.
  • the upper transmission bandwidth of the STA refers to the maximum actual bandwidth that can be achieved by the STA and the AP during data transmission.
  • the upper transmission bandwidth of the STA may impose certain restrictions on the actual transmission bandwidth. For example, if the transmission upper bandwidth of the STA is smaller than the negotiated bandwidth with the STA, the AP is likely to be made. The actual transmission bandwidth with the STA cannot be achieved based on the existing rate. Adapting to the transmission bandwidth selected by the algorithm, resulting in a problem of high transmission bandwidth. Therefore, in this embodiment, after receiving the data transmission request of the STA, the bandwidth is not directly sent according to the negotiation bandwidth of the AP and the STA, but needs to be considered to limit the actual transmission bandwidth of the AP and the STA. The upper limit of the transmission bandwidth of the STA.
  • the AP sends the first MCS to the STA.
  • the first MCS is smaller than the MCS corresponding to the negotiation bandwidth of the AP and the STA in the correspondence between the bandwidth and the MCS. It is equal to the MCS corresponding to the transmission upper limit bandwidth of the STA in the correspondence between the bandwidth and the MCS.
  • the correspondence between the bandwidth and the MCS reflects the relationship between the negotiation bandwidth of the AP and the STA and the MCS delivered by the AP to the STA.
  • the specific MCS is determined by the negotiation bandwidth of the AP and the STA. Therefore, the corresponding relationship between the bandwidth and the MCS is set in advance.
  • the adaptation algorithm determines the MCS corresponding to the negotiation bandwidth of the AP and the STA.
  • the existing bandwidth control table is a representation of the above correspondence.
  • the corresponding relationship may specifically be a correspondence under a specific communication standard, for example, a correspondence relationship under the IEEE 802. l la/b/g/n/ac standard.
  • the MCS corresponding to a certain bandwidth may be selected in the corresponding relationship between the bandwidth and the MCS, such as the bandwidth control table, and may be implemented in various manners. Only an alternative embodiment is illustrated below.
  • the MCS corresponding to a certain bandwidth may be an MCS corresponding to the bandwidth that is closest to the bandwidth and smaller than the bandwidth in the bandwidth control table.
  • the bandwidth control table shown in Table 1 multiple MCSs are included, and each MCS corresponds to a specific bandwidth. If the negotiation bandwidth of the AP and the STA is 40 Mbps, the bandwidth closest to 40 Mbps and less than 40 Mbps may be selected, that is, the MCS 4 corresponding to 39 Mbps is used as the second MCS corresponding to the negotiation bandwidth of the AP and the STA.
  • the AP directly delivers the MCS corresponding to the negotiation bandwidth of the AP and the STA.
  • the upper bandwidth of the STA also limits the actual transmission bandwidth of the AP and the STA, for example, when the bandwidth is If the MCS corresponding to the transmission upper bandwidth of the STA is smaller than the MCS corresponding to the negotiation bandwidth of the STA, the MCS corresponding to the negotiation bandwidth of the AP and the STA may be sent to the MCS.
  • the MCS to be delivered is lower than the MCS corresponding to the negotiation bandwidth of the AP and the STA.
  • the reduced MCS must be greater than or equal to the MCS corresponding to the transmission upper bandwidth of the STA. Obviously, the MCS selected based on this method is more reasonable.
  • the MCS corresponding to the negotiation bandwidth of the AP and the STA is selected as the MC4, and the upper transmission bandwidth of the STA is selected from the bandwidth control table shown in Table 1.
  • the corresponding MCS is MCS2. Since the MCS2 is smaller than the MCS4, in this step, the AP selects the MCS that is smaller than the MCS4 and equal to or greater than the MCS2, that is, the MCS2 or the MCS3 is delivered to the STA, thereby implementing the transmission bandwidth selection. For example, if MCS2 is selected for delivery, the transmission bandwidth between the AP and the STA is set to the bandwidth corresponding to MCS2, which is 19.5 Mbps.
  • the transmission of the STA is preferred in this step.
  • the MCS corresponding to the upper limit bandwidth is delivered to the STA.
  • the bandwidth selection is performed in this embodiment, not only the negotiation bandwidth of the AP and the STA but also the upper limit bandwidth of the STA is considered, and when the transmission upper bandwidth of the STA is smaller than the negotiation bandwidth of the AP and the STA, If the MCS that is based on the AP and the STA negotiates the bandwidth is the same, the transmission bandwidth is too high.
  • the MCS is delivered, and the first MCS is sent to the STA.
  • the first MCS is smaller than the corresponding relationship between the bandwidth and the MCS.
  • the MCS corresponding to the negotiation bandwidth of the AP and the STA is greater than or equal to the MCS corresponding to the transmission upper bandwidth in the corresponding relationship between the bandwidth and the MCS, so that in a scenario where some transmission bandwidths are falsely high, the bandwidth is reduced according to the transmission upper limit bandwidth of the STA.
  • the delivered MCS is used to reduce the transmission bandwidth of the delivered device. Therefore, the power consumption of the AP and STA devices is reduced, and the battery life is increased.
  • the rate adaptive algorithm in the prior art is relatively mature, and the algorithm is relatively complicated. If the algorithm itself is changed, the complexity of the algorithm is further increased, the amount of calculation is increased, and the final bandwidth selection effect is also Difficult to make predictions.
  • the existing rate adaptation algorithm is not changed, so it is simple and easy to implement, and the algorithm complexity and the calculation amount are not increased, and the final bandwidth selection effect can be ensured, and is applicable to Any of the prior art rate adaptive algorithms.
  • the transmission upper limit bandwidth of the STA is greater than or equal to the negotiation bandwidth of the AP and the STA, in step S103, the transmission bandwidth is not high, so the AP and the STA are directly selected.
  • the MCS corresponding to the bandwidth is delivered to the STA.
  • the AP performs data transmission based on the first MCS and the STA delivered in the step.
  • the MCS corresponding to the negotiation bandwidth of the AP and the STA may be updated. For example, when the channel condition between the AP and the STA changes (for example, when the STA moves), the AP may according to the new channel.
  • the status update updates the MCS corresponding to the bandwidth.
  • the AP determines whether the MCS corresponding to the upper limit bandwidth of the STA is smaller than the updated negotiation bandwidth. If yes, the first MCS is updated and the updated first MCS is sent to the STA.
  • the first MCS is smaller than the MCS corresponding to the updated negotiation bandwidth, and is greater than or equal to the MCS corresponding to the transmission upper bandwidth of the STA.
  • the MCS corresponding to the transmission upper limit bandwidth of the STA may also be updated, and in order to adapt to the update, the embodiment may perform step S102 to step S103 cyclically, or may also be STA every time. After the MCS corresponding to the transmission upper limit bandwidth is updated, it is re-updated. Step S 1 03 is performed, so that the final delivered bandwidth is adjusted in real time.
  • the AP determines the corresponding MCS according to the negotiation bandwidth and the transmission upper bandwidth respectively.
  • the comparison of the negotiated bandwidth and the transmission upper limit bandwidth is realized by comparison of the MCS. This case will be described below by way of an embodiment.
  • an embodiment of the present invention provides a second embodiment of a bandwidth selection method for Wi F i technology.
  • the AP acquires the negotiated bandwidth with the STA, and obtains the second MCS according to the negotiated bandwidth.
  • the second MCS is the MCS corresponding to the negotiated bandwidth in the correspondence between the bandwidth and the MCS.
  • the bandwidth control table shown in Table 1 is used as an example.
  • 40Mbp s you can choose the closest to 40Mbps, and less than 40Mbps bandwidth, that is, the MCS4 corresponding to 39Mbps as the second MCS corresponding to 40Mbps.
  • S201 The AP receives a data transmission request of the STA.
  • the request may be sent by the STA or sent by the uplink of the AP.
  • S202 The AP acquires a transmission upper limit bandwidth of the STA.
  • the upper transmission bandwidth of the STA refers to the maximum actual bandwidth that can be achieved by the STA and the AP during data transmission.
  • S203 Acquire a third MCS according to the transmission upper limit bandwidth.
  • the third MCS is an MCS corresponding to the transmission upper limit bandwidth in a correspondence between the bandwidth and the MCS.
  • the bandwidth control table shown in Table 1 shows that if the transmission upper limit bandwidth of the STA is specifically 20 Mbps, the bandwidth closest to 20 Mbps and less than 20 Mbps can be selected, that is, the MCS2 corresponding to 19.5 Mbps is the 20 Mbps corresponding. Three MCS.
  • the AP sends a first MCS to the STA; the first MCS is smaller than the second MCS, and is greater than or equal to the third MCS.
  • the second MCS is the MCS selected based on the negotiation rate of the AP and the STA
  • the third MCS is the MCS selected based on the transmission upper bandwidth of the STA.
  • the second MCS is directly delivered, but because The upper transmission bandwidth of the STA also limits the actual transmission bandwidth of the AP and the STA.
  • the third MCS is smaller than the second MCS
  • the second MCS is sent to the virtual network.
  • the MCS that is delivered is reduced, and the first MCS that is smaller than the third MCS is selected to be delivered.
  • the negotiation bandwidth of the STA is 40 Mbps and the transmission upper bandwidth of the STA is specifically 20 Mbps
  • the corresponding second MCS is selected as MC4 and the third MCS is MCS2 from the bandwidth control table shown in Table 1. Since the MCS2 is smaller than the MCS4, in this step, the MCS that is smaller than the MCS4 and equal to or greater than the MCS2 is selected, that is, the MCS2 or the MCS3 is delivered to the STA, thereby implementing transmission bandwidth selection. For example, if MCS2 is selected for delivery, the transmission bandwidth between the final AP and the STA is set to the bandwidth corresponding to MCS2, which is 19.5 Mbps.
  • the third MCS is preferably performed to the STA. Issued.
  • the bandwidth of the AP is not only considered by the AP and the STA, but also the bandwidth of the STA is determined according to the negotiation bandwidth of the AP and the STA and the upper bandwidth of the STA.
  • the bandwidth control table determines the second MCS and the third MCS.
  • the third MCS is smaller than the second MCS, it indicates that if the transmission is performed based on the second MCS, the transmission bandwidth is too high, so that the delivered MCS is lowered, and the STA is sent to the STA that is smaller than the second MCS and equal to or greater than the third MCS.
  • An MCS is implemented to reduce the final transmission of the MCS according to the transmission upper bandwidth of the STA in a scenario where the transmission bandwidth is too high. Therefore, the transmission bandwidth of the AP and the STA side device is reduced. Quantity, increase battery life.
  • this embodiment not only considers the negotiation bandwidth with the STA obtained according to the rate adaptive algorithm, but also considers the transmission upper limit bandwidth of the STA.
  • the upper limit of the transmission bandwidth of the STA may be limited to the actual transmission bandwidth of the AP and the STA, and may be obtained based on the transmission bandwidth of the uplink segment of the AP and/or the transmission requirement bandwidth of the STA. The following is described in detail by way of an embodiment.
  • an embodiment of the present invention provides a third embodiment of a method for selecting a bandwidth of a WiFi technology.
  • This embodiment focuses on the method for acquiring a transmission upper bandwidth of a STA. It should be noted that this The embodiment of the present invention is described in the embodiment of the present invention. The method for obtaining the upper limit bandwidth of the STA in this embodiment may be used in the embodiment of the present invention. In other embodiments.
  • the AP acquires the negotiation bandwidth with the STA according to the rate adaptation algorithm, and obtains the second MCS according to the negotiation bandwidth.
  • the second MCS is the MCS corresponding to the negotiation bandwidth in the correspondence between the bandwidth and the MCS. .
  • the correspondence between bandwidth and MCS is different in different transmission systems. Therefore, in the embodiment, when the second MCS is acquired, it may be selected in the MCS corresponding to the transmission system.
  • the transmission system can be determined by at least one of the following parameters: channel frequency resource, open state of short guard interval, and I/O (input/output) mode. The following is illustrated by an example.
  • the transmission system includes: channel frequency resource, open state of short guard interval, and I/O mode.
  • the channel frequency resource includes two types: a 20 MHz channel frequency resource and a 40 MHz channel frequency resource.
  • the open state of the short guard interval includes two types: the short guard interval is not turned on and the short guard interval is turned on.
  • the I/O mode includes SIS0 (S ing le Input S ing le Output (Single Input and Output), 2 X 2MIM0 (Mul t iple Input Mul t iple Output). Therefore, when acquiring the second MCS corresponding to the negotiated bandwidth, it is first necessary to determine a corresponding transmission system.
  • the MCS corresponding to 40 MHz is determined to be MCS4 in the corresponding transmission system.
  • MCS 3 26 MCS3 52 MCS3 54 MCS 3 108
  • MCS4 39 MCS4 78 MCS4 80 MCS4 162 MCS5 52 MCS5 104 MCS5 108 MCS5 216 Enable Short Protection MCS0 7. 2 MCS0 14. 4 MCS0 15 MCS0 30 Interval MCS1 14. 4 MCS1 28. 9 MCS1 30 MCS1 60
  • MCS2 21. 7 MCS2 43. 3 MCS2 45 MCS2 90 This embodiment specifically includes:
  • S301 The AP receives a data transmission request of the STA.
  • the request may be sent by the STA or sent by the uplink of the AP.
  • S302 The AP acquires a transmission upper limit bandwidth of the STA.
  • the transmission upper limit bandwidth of the STA may be acquired based on the transmission bandwidth of the uplink segment of the AP and/or the transmission required bandwidth of the STA. The following are explained in three cases.
  • the transmission upper bandwidth of the STA is obtained based on the transmission bandwidth of the uplink segment of the AP.
  • the transmission bandwidth of the uplink segment of the AP refers to the transmission bandwidth negotiated by the uplink segment of the AP when transmitting data.
  • the AP when performing data transmission in the uplink segment, the AP generally obtains the channel quality between the AP and the uplink end (the WAN side or the LAN side) of the AP, and negotiates the transmission bandwidth between the AP and the uplink according to the channel quality. .
  • the AP finally delivers the bandwidth to the STA, that is, the bandwidth selection of the downlink segment of the AP.
  • the transmission bandwidth of the uplink segment also plays a certain role in limiting the transmission bandwidth of the downlink segment.
  • the uplink segment and the downlink segment are separately performed when performing bandwidth selection. Therefore, the bandwidth selection of the downlink segment is based only on the channel quality of the downlink segment, and the related situation of the uplink segment is not considered. The factors are not comprehensive.
  • the transmission bandwidth of the uplink is taken into consideration.
  • the transmission bandwidth of the uplink segment of the AP may be directly used as the transmission upper bandwidth of the STA.
  • the specific manner of obtaining the transmission bandwidth of the uplink segment of the AP is not limited in the embodiment of the present invention, and only a few possible modes are illustrated below.
  • the method for obtaining the transmission bandwidth of the uplink segment of the AP may include: the AP acquires the resource block size allocated for the uplink segment of the AP; and the AP obtains the transmission bandwidth of the uplink segment of the AP according to the resource block size.
  • This mode can be specifically used when the uplink end is the WAN side.
  • the AP receives the data transmission request from the STA, the WAN side The AP also needs to deliver a transmission rate for the AP. Therefore, the WAN side allocates resource blocks to the AP according to the channel conditions of the AP. Therefore, according to the size of the allocated resource blocks, the transmission bandwidth of the uplink segment of the AP can be calculated.
  • the size of the resource block can be read directly from the modem.
  • the method for obtaining the transmission bandwidth of the uplink segment of the AP can also be obtained by means of speed measurement.
  • This mode can be used for the case where the uplink is the WAN side or the LAN side.
  • the test software is installed in the uplink segment of the AP, or the actual transmission rate of the uplink segment of the AP can be obtained according to the test site, thereby serving as the transmission bandwidth of the uplink segment of the AP.
  • the transmission upper bandwidth of the STA is obtained based on the transmission required bandwidth of the STA.
  • the input parameters of the rate adaptive algorithm are the channel quality of the AP and the STA, for example, parameters such as RSS I, PSR, and PER, and the STA is not considered.
  • the specific bandwidth requirement for transmitting data, that is, the transmission bandwidth of the STA, is obviously not comprehensive in this way.
  • the transmission required bandwidth of the STA can be directly used as the transmission upper limit bandwidth of the STA.
  • the specific manner of obtaining the bandwidth of the transmission of the STA is not limited in the embodiment of the present invention. Only a feasible manner is illustrated below.
  • the method for obtaining the transmission required bandwidth of the STA may include: the AP obtains the service type of the transmission data from the data transmission request; and the AP acquires the transmission required bandwidth of the STA based on the service type.
  • the request generally includes the service type of the STA's transmission data, such as video, picture or text data. If it is video data, it is HD video or standard definition video. According to the type of service, the transmission demand bandwidth can be calculated.
  • the bandwidth is obtained based on the transmission bandwidth of the AP uplink segment and the transmission requirement bandwidth of the STA.
  • the transmission bandwidth of the uplink segment of the AP and the bandwidth of the transmission required bandwidth of the STA are generally used as the transmission upper bandwidth of the STA. For example, if the transmission bandwidth of the uplink segment of the AP is 25 Mbps and the transmission bandwidth of the STA is 20 Mbps, the bandwidth of the upper transmission limit of the STA is determined to be 20 Mbps.
  • S 30 3 Acquire a third MCS according to the transmission upper limit bandwidth; the third MCS is an MCS corresponding to the transmission upper limit bandwidth in a correspondence between the bandwidth and the MCS. Similar to the process of selecting the second MCS, this step may also be selected in the MCS corresponding to the transmission system when the third MCS is selected. For details, see the procedure for selecting the second MCS.
  • the AP sends a first MCS to the STA; the first MCS is smaller than the second MCS, and is greater than or equal to the third MCS.
  • the AP preferably delivers the third MCS.
  • the two embodiments of the upper limit bandwidth are used to implement the bandwidth selection, not only considering the negotiation bandwidth of the AP and the STA, but also considering the upper limit bandwidth of the STA, thereby solving the problem.
  • the problem of high transmission bandwidth is high.
  • the corresponding MCS is selected based on the above two bandwidths, and the MCS is finally determined by comparing the MCS.
  • an embodiment of the present invention provides a fourth embodiment of a bandwidth selection method for a WiFi technology.
  • an AP acquires a negotiation bandwidth with a STA.
  • the STA may be in the process of obtaining the negotiation bandwidth.
  • the AP may specifically obtain a negotiation bandwidth with the STA according to the rate adaptation algorithm.
  • S401 The AP receives a data transmission request of the STA.
  • the request may be sent by the STA or sent by the uplink of the AP.
  • the AP acquires a transmission upper limit bandwidth of the STA.
  • the upper transmission bandwidth of the STA refers to the maximum actual bandwidth that can be achieved by the STA and the AP during data transmission.
  • S403 Acquire a third MCS according to the transmission upper limit bandwidth of the STA.
  • the third MCS is an MCS corresponding to a transmission upper bandwidth of the STA in a correspondence between the bandwidth and the MCS.
  • the mapping between the bandwidth and the MCS reflects the negotiation bandwidth between the AP and the STA and the AP delivers the message to the STA.
  • One form of expression is the existing bandwidth control table.
  • step S403 when it is determined that the transmission upper limit bandwidth of the STA is smaller than the negotiation bandwidth with the STA, step S403 is performed.
  • the corresponding MCS is not selected according to the foregoing two bandwidths, and then the MCS is compared, but the two bandwidths are compared first, and the upper transmission bandwidth of the STA is compared. If the negotiation bandwidth is smaller than that of the STA, it indicates that the transmission bandwidth is too high. Therefore, the smaller of the two bandwidths, that is, the MCS corresponding to the upper bandwidth of the STA is sent to the STA. It is also possible to avoid situations where the transmission bandwidth is too high.
  • the bandwidth control table is as shown in Table 1. If the negotiation bandwidth with the STA is 40 Mbps and the transmission upper bandwidth of the STA is 20 Mbps, it is obvious that the transmission upper bandwidth of the STA is smaller than the negotiation bandwidth with the STA. Therefore, the transmission upper bandwidth of the STA is selected, that is, 20 Mbps.
  • the corresponding MCS2 performs bandwidth delivery.
  • the bandwidth of the STA is not only considered to be negotiated, but also the upper bandwidth of the STA is considered.
  • the upper bandwidth of the STA is smaller than the negotiated bandwidth of the STA,
  • the MCS corresponding to the upper limit of the transmission bandwidth of the smaller STA is selected to be delivered, so that the MCS that is finally delivered is reduced according to the upper limit of the transmission bandwidth in the scenario where the transmission bandwidth is too high, thereby reducing the transmission bandwidth. Therefore, the power consumption of the AP and STA side devices is reduced, and the battery life is increased.
  • the transmission bandwidth of the STA when the transmission upper bandwidth of the STA is smaller than the negotiated bandwidth with the STA, the transmission bandwidth does not necessarily have a virtual high.
  • the transmission upper bandwidth of the STA and the negotiated bandwidth with the STA may both correspond to the same MCS.
  • the bandwidth of the MCS corresponding to the upper limit bandwidth of the smaller STA is selected, the bandwidth can be guaranteed to avoid the virtual high bandwidth.
  • step S403 if the transmission upper bandwidth of the STA is greater than or equal to the negotiation bandwidth with the STA, that is, the transmission bandwidth is not high, so the AP is in the band.
  • the MCS corresponding to the negotiated bandwidth of the STA is sent to the STA in the wide control table.
  • this embodiment not only considers the negotiation bandwidth of the AP and the STA, but also considers the transmission upper limit bandwidth of the STA.
  • the transmission upper bandwidth of the STA may limit the actual transmission bandwidth of the AP and the STA, and may be obtained based on the transmission bandwidth of the AP uplink segment and/or the transmission requirement bandwidth of the STA.
  • the third embodiment of the method For the specific acquisition manner, refer to the third embodiment of the method. The relevant points are not repeated here.
  • the MCS corresponding to the upper limit bandwidth of the STA When the MCS corresponding to the upper limit bandwidth of the STA is selected in this embodiment, the MCS corresponding to the bandwidth that is closest to the upper bandwidth limit and smaller than the upper bandwidth limit may be selected. In addition, the MCS can also be selected in the MCS corresponding to the transmission system.
  • the transmission system may be determined based on at least one of the following parameters: a channel frequency of the downlink segment, an open state of the short guard interval, and an I/O mode. For details, refer to the bandwidth selection method in the first embodiment and the third embodiment. Here, I will not repeat them here.
  • an embodiment of the present invention provides a first embodiment of an AP.
  • the AP in this embodiment includes: a receiver 501, a processor 502, and a transmitter 503.
  • the transmitter 503 is coupled to the processor 502, and the receiver 501 is coupled to the processor 502.
  • the processor 502 can be connected to the transmitter 503 and the receiver 501 via a bus or other means.
  • the bus connection is taken as an example.
  • the receiver 501 is configured to receive a data transmission request of the STA.
  • the receiver 501 receives the data transmission request of the STA.
  • the request may be sent by the STA. For example, when the user on the STA side clicks to play the video, the STA sends a data transmission request to the receiver 501.
  • the request may also be sent by the uplink end of the AP, such as the WAN side or the LAN.
  • the side pushes data to the STA, it transmits a data transmission request of the STA to the receiver 501.
  • the processor 502 is configured to obtain a negotiated bandwidth of the STA, and obtain a transmission upper bandwidth of the STA after the receiver 501 receives the data transmission request.
  • the processor 502 of the embodiment may specifically When the STA first establishes a path, or when the channel condition between the AP and the STA changes, for example, when the STA moves.
  • the processor 502 may specifically obtain the negotiation bandwidth with the STA according to the rate adaptation algorithm.
  • the upper transmission bandwidth of the STA refers to the maximum actual bandwidth that can be achieved by the STA and the AP during data transmission.
  • the upper transmission bandwidth of the STA may impose certain restrictions on the actual transmission bandwidth. For example, if the transmission upper bandwidth of the STA is smaller than the negotiated bandwidth with the STA, The actual transmission bandwidth of the AP and the STA cannot reach the transmission bandwidth selected based on the existing rate adaptation algorithm, resulting in a problem that the transmission bandwidth is too high. Therefore, in this embodiment, after receiving the data transmission request of the STA, the bandwidth is not directly sent according to the negotiated bandwidth of the AP and the STA, but needs to be considered to limit the actual transmission bandwidth of the AP and the STA. The upper limit of the transmission bandwidth of the STA.
  • the transmitter 503 is configured to: if the processor 502 determines that the transmission upper limit bandwidth is smaller than the negotiation bandwidth, send a first MCS to the STA, where the first MCS is smaller than the corresponding bandwidth of the bandwidth and the MCS.
  • the MCS is greater than or equal to the MCS corresponding to the transmission upper limit bandwidth in the correspondence between the bandwidth and the MCS.
  • the correspondence between the bandwidth and the MCS reflects the relationship between the negotiation bandwidth of the AP and the STA and the MCS delivered by the AP to the STA.
  • the specific MCS is determined by the negotiation bandwidth of the AP and the STA. Therefore, the corresponding relationship between the bandwidth and the MCS is set in advance.
  • the adaptation algorithm determines the MCS corresponding to the negotiation bandwidth of the AP and the STA.
  • the existing bandwidth control table is a representation of the above correspondence.
  • the corresponding relationship may specifically be a correspondence under a specific communication standard, for example, a correspondence relationship under the IEEE 802. l la/b/g/n/ac standard.
  • the MCS corresponding to a certain bandwidth may be selected in the corresponding relationship between the bandwidth and the MCS, such as the bandwidth control table, and may be implemented in various manners. Only an alternative embodiment is illustrated below.
  • the MCS corresponding to a certain bandwidth may specifically be an MCS corresponding to the bandwidth of the bandwidth control table that is closest to the bandwidth and smaller than the bandwidth.
  • the transmitter 503 directly delivers the MCS corresponding to the negotiation bandwidth of the AP and the STA, but the upper transmission bandwidth of the STA also limits the actual transmission bandwidth of the AP and the STA. For example, when the MCS corresponding to the transmission upper bandwidth of the STA is smaller than the MCS of the STA and the negotiation bandwidth of the STA, the MCS corresponding to the negotiation bandwidth of the AP and the STA will be transmitted. If the MCS is lower, the MCS that is delivered is smaller than the MCS corresponding to the negotiated bandwidth of the AP and the STA. However, in order to avoid unrestricted reduction of the MCS and the bandwidth is too low, the transmission efficiency is affected. Therefore, the reduced MCS must be greater than or equal to the MCS corresponding to the transmission upper bandwidth of the STA. Obviously, the MCS selected based on this method is more reasonable.
  • the MCS corresponding to the negotiation bandwidth of the AP and the STA is selected as the MC4, and the upper transmission bandwidth of the STA is selected from the bandwidth control table shown in Table 1.
  • the corresponding MCS is MCS2. Since the MCS2 is smaller than the MCS4, the transmitter 503 delivers the MCS that is smaller than the MCS4 and equal to or greater than the MCS2, that is, the MCS2 or the MCS3, to achieve the transmission bandwidth selection. For example, if MCS2 is selected for delivery, the transmission bandwidth between the AP and the STA is set to the bandwidth corresponding to MCS2, which is 19.5 Mbps.
  • the transmitter 503 preferably transmits the STA.
  • the MCS corresponding to the upper limit bandwidth is delivered to the STA.
  • the bandwidth selection when the bandwidth selection is performed in this embodiment, not only the negotiation bandwidth of the AP and the STA but also the upper limit bandwidth of the STA is considered, and when the transmission upper bandwidth of the STA is smaller than the negotiation bandwidth of the AP and the STA, If the MCS that is based on the AP and the STA negotiates the bandwidth is the same, the transmission bandwidth is too high. Therefore, the MCS is delivered, and the first MCS is sent to the STA. The first MCS is smaller than the corresponding relationship between the bandwidth and the MCS.
  • the MCS corresponding to the negotiation bandwidth of the AP and the STA is greater than or equal to the MCS corresponding to the transmission upper bandwidth in the corresponding relationship between the bandwidth and the MCS, so that in a scenario where some transmission bandwidths are falsely high, the bandwidth is reduced according to the transmission upper limit bandwidth of the STA.
  • the delivered MCS is used to reduce the transmission bandwidth of the delivered device. Therefore, the power consumption of the AP and STA devices is reduced, and the battery life is increased.
  • the existing rate adaptation algorithm when the transmission bandwidth of the transmission is reduced, the existing rate adaptation algorithm is not changed, so that it is simple and easy to implement, and does not increase the complexity and calculation amount of the algorithm, thereby ensuring the final bandwidth selection effect, and is applicable to Any of the prior art rate adaptive algorithms.
  • the processor 502 may be a central processing unit CPU or specific The integrated circuit AS IC (Appli-Calculation Integrated Integrated C i rcui t), or one or more integrated circuits that have been configured to implement the embodiments of the present application.
  • Embodiments of the present invention may further include a memory for storing the program.
  • the memory may include a high speed RAM memory and may also include a non-vo la tile memory, such as at least one disk memory.
  • the processor 502 determines that the transmission upper limit bandwidth of the STA is greater than or equal to
  • the negotiation bandwidth of the AP and the STA that is, the problem that the transmission bandwidth is not high is high. Therefore, the sender 503 directly selects the MCS corresponding to the negotiation bandwidth of the AP and the STA to deliver the message to the STA.
  • the transmitter 503 and the receiver 501 perform data transmission based on the delivered first MCS and the STA.
  • the MCS corresponding to the negotiation bandwidth of the AP and the STA may be updated.
  • the processor 502 when the channel condition between the AP and the STA changes (for example, when the STA moves), the processor 502 according to the new The channel condition update negotiates the MCS corresponding to the bandwidth.
  • the processor 502 determines whether the MCS corresponding to the transmission upper bandwidth of the STA is smaller than the updated negotiation bandwidth. If yes, the first MCS is updated and the transmitter 503 is notified to send an update to the STA.
  • the updated first MCS is smaller than the MCS corresponding to the updated negotiation bandwidth, and is greater than or equal to the MCS corresponding to the transmission upper bandwidth of the STA.
  • the MCS corresponding to the transmission upper limit bandwidth of the STA may also be updated, and in order to adapt to the update, the processor 502 and the transmitter 503 may cyclically perform the acquisition of the upper limit bandwidth of the STA and deliver the bandwidth. First MCS. Alternatively, the transmitter 503 may re-issue the first MCS after the MCS corresponding to the transmission upper limit bandwidth of the STA is updated, so that the final bandwidth is adjusted in real time.
  • the AP determines the corresponding MCS according to the negotiation bandwidth and the transmission upper bandwidth respectively.
  • the comparison of the negotiated bandwidth and the transmission upper limit bandwidth is realized by comparison of the MCS. This case will be described below by way of an embodiment.
  • an embodiment of the present invention provides a second embodiment of an AP.
  • the AP in this embodiment includes: a receiver 601, a processor 602, and a transmitter 603.
  • Transmitter 603 is coupled to processor 602, and receiver 601 is coupled to processor 602.
  • the receiver 601 is configured to receive a data transmission request of the STA.
  • the request may be sent by the STA or sent by the uplink of the AP.
  • the processor 602 is configured to: acquire a negotiation bandwidth of the STA, and acquire a second MCS according to the negotiation bandwidth; after receiving the data transmission request, the receiver 601 acquires a transmission upper bandwidth of the STA, and acquires a third according to the transmission upper bandwidth.
  • MCS MCS.
  • the second MCS is the MCS corresponding to the negotiated bandwidth in the correspondence between the bandwidth and the MCS; the third MCS is the MCS corresponding to the transmission upper bandwidth in the correspondence between the bandwidth and the MCS.
  • the processor 602 When the processor 602 obtains the bandwidth negotiated with the STA, the specific situation may occur when the channel is initially established between the AP and the STA, or when the channel condition between the AP and the STA changes, for example, when the STA moves.
  • the processor 602 may specifically obtain the negotiation bandwidth with the STA according to the rate adaptation algorithm.
  • the bandwidth closest to 40 Mbps and less than 40 Mbps can be selected, that is, the MCS4 corresponding to 39 Mbps is the second corresponding to 40 Mbps. MCS. If the transmission upper limit bandwidth of the STA is specifically 20 Mbps, the bandwidth closest to 20 Mbps and less than 20 Mbps may be selected, that is, the MCS2 corresponding to 19.5 Mbps is used as the third MCS corresponding to 20 Mbps.
  • the transmitter 603 is configured to: if the processor 602 determines that the third MCS is smaller than the second MCS, send the first MCS to the STA.
  • the first MCS is smaller than the second MCS and greater than or equal to the third MCS.
  • the second MCS is the MCS selected based on the negotiation rate of the AP and the STA
  • the third MCS is the MCS selected based on the transmission upper bandwidth of the STA.
  • the second MCS is directly delivered, but the upper transmission bandwidth of the STA also limits the actual transmission bandwidth of the AP and the STA.
  • the third MCS is smaller than the second MCS, If the second MCS is delivered, the transmission bandwidth is too high. Therefore, the MCS to be delivered is reduced.
  • the first MCS is smaller than the second MCS.
  • the first MCS is greater than or equal to the third MCS.
  • the transmitter 603 preferably performs the third MCS to the STA. Issued.
  • the bandwidth selection when the bandwidth selection is performed in this embodiment, not only the AP is considered.
  • the third MCS is smaller than the second MCS, it indicates that if the transmission is performed based on the second MCS, the transmission bandwidth is too high, so that the delivered MCS is lowered, and the STA is sent to the STA that is smaller than the second MCS and equal to or greater than the third MCS.
  • An MCS is implemented to reduce the final transmission of the MCS according to the transmission upper bandwidth of the STA in a scenario where the transmission bandwidth is too high. Therefore, the transmission bandwidth of the AP and the STA side device is reduced. Quantity, increase battery life.
  • the present embodiment not only considers the negotiation bandwidth of the AP and the STA, but also considers the transmission upper limit bandwidth of the STA, thereby solving the problem that the transmission bandwidth is too high.
  • the corresponding MCS is selected based on the above two bandwidths, and the final MCS is determined by comparing the MCS. In fact, it is also possible to compare the above two bandwidths first, and determine the final MCS to be issued based on the comparison result. The following is explained by an embodiment.
  • an embodiment of the present invention provides a third embodiment of an AP.
  • the AP in this embodiment includes: a receiver 701, a processor 702, and a transmitter 703.
  • the transmitter 703 is coupled to the processor 702, and the receiver 701 is coupled to the processor 702.
  • the receiver 701 is configured to receive a data transmission request of the STA.
  • the request may be sent by the STA or sent by the uplink of the AP.
  • the processor 702 is configured to: acquire, by the AP, a bandwidth negotiated with the STA, and after receiving the data transmission request, the receiver 701 acquires a transmission upper bandwidth of the STA, and acquires a third MCS according to the transmission upper bandwidth; the third MCS is a bandwidth and The MCS corresponding to the transmission upper limit bandwidth in the correspondence relationship of the MCS.
  • the processor 702 When the processor 702 obtains the bandwidth negotiated with the STA, the AP may periodically establish a path with the STA, or when the channel condition between the AP and the STA changes, for example, when the STA moves.
  • the processor 702 may specifically obtain the negotiation bandwidth with the STA according to the rate adaptation algorithm.
  • the correspondence between the bandwidth and the MCS reflects the correspondence between the negotiated bandwidth between the AP and the STA and the MCS sent by the AP to the STA.
  • One form of expression is the existing bandwidth control table.
  • the transmitter 703 is configured to: if the upper limit bandwidth of the STA is smaller than the negotiated bandwidth with the STA, The AP sends a third MCS to the STA.
  • the corresponding MCS is not selected according to the foregoing two bandwidths, and then the MCS is compared, but the two bandwidths are compared first, and the upper transmission bandwidth of the STA is compared. If the negotiation bandwidth is smaller than that of the STA, it indicates that the transmission bandwidth is too high. Therefore, the smaller of the two bandwidths, that is, the MCS corresponding to the upper bandwidth of the STA is sent to the STA. It is also possible to avoid situations where the transmission bandwidth is too high.
  • the bandwidth of the STA is not only considered to be negotiated, but also the upper bandwidth of the STA is considered.
  • the upper bandwidth of the STA is smaller than the negotiated bandwidth of the STA,
  • the MCS corresponding to the upper limit of the transmission bandwidth of the smaller STA is selected to be delivered, so that the MCS that is finally delivered is reduced according to the upper limit of the transmission bandwidth in the scenario where the transmission bandwidth is too high, thereby reducing the transmission bandwidth. Therefore, the power consumption of the AP and STA side devices is reduced, and the battery life is increased.
  • the transmission bandwidth of the STA when the transmission upper bandwidth of the STA is smaller than the negotiated bandwidth with the STA, the transmission bandwidth does not necessarily have a virtual high.
  • the transmission upper bandwidth of the STA and the negotiated bandwidth with the STA may both correspond to the same MCS.
  • the bandwidth of the MCS corresponding to the upper limit bandwidth of the smaller STA is selected, the bandwidth can be guaranteed to avoid the virtual high bandwidth.
  • the processor 702 determines that the transmission upper bandwidth of the STA is greater than or equal to the negotiation bandwidth with the STA, that is, the transmission bandwidth is not high, so the transmitter 703 sends the address to the STA.
  • the MCS corresponding to the negotiation bandwidth.
  • the embodiment of the present invention not only considers the negotiation bandwidth of the AP and the STA, but also considers the transmission upper limit bandwidth of the STA.
  • the transmission upper bandwidth of the STA may limit the actual transmission bandwidth of the AP and the STA, and may be obtained based on the transmission bandwidth of the AP uplink segment and/or the transmission requirement bandwidth of the STA.
  • the third embodiment of the method refer to the third embodiment of the method. The relevant points are not repeated here.
  • the MCS corresponding to the upper limit bandwidth of the STA When the MCS corresponding to the upper limit bandwidth of the STA is selected in the embodiment of the present invention, the MCS corresponding to the bandwidth that is closest to the upper bandwidth limit and smaller than the upper limit of the bandwidth may be selected. In addition, the MCS can also be selected in the MCS corresponding to the transmission system.
  • the transmission system may be determined based on at least one of the following parameters: a channel frequency of the downlink segment, an open state of the short guard interval, and an I/O mode. For details, refer to the bandwidth selection method of the first embodiment and the third embodiment. Where, no longer here Narration.
  • the embodiment of the AP in the embodiment of the present invention is described above from the perspective of hardware processing.
  • the AP in the embodiment of the present invention will be described from the perspective of a modular functional entity.
  • the embodiment of the present invention provides a fourth embodiment of the AP.
  • the AP in this embodiment includes: a first obtaining module 801, a receiving requesting module 802, a second obtaining module 803, and a sending module 804.
  • the first obtaining module 801 is configured to obtain a negotiated bandwidth with the STA.
  • the AP may first establish a path with the STA, or when the channel condition between the AP and the STA changes, for example, when the STA moves.
  • the first obtaining module 801 may specifically obtain a negotiation bandwidth with the STA according to the rate adaptive algorithm.
  • the rate adaptation algorithm is an algorithm for obtaining the negotiation bandwidth between the AP and the STA in the prior art.
  • the AP first obtains the channel quality between the AP and the STA, such as RSSI, PSR, and PER. Then, according to the obtained channel quality, the negotiation bandwidth of the AP and the STA is calculated by using any rate adaptive algorithm.
  • the receiving request module 802 is configured to receive a data transmission request of the STA.
  • the receiving request module 802 receives the data transmission request of the STA.
  • the request may be sent by the STA.
  • the STA sends a data transmission request to the receiving request module 802.
  • the request may also be sent by the uplink end of the AP, for example, the WAN side or
  • the LAN side wants to push data to the STA, it transmits a data transmission request of the STA to the reception requesting module 802.
  • the second obtaining module 803 is configured to: after receiving the data transmission request, the receiving request module 802 acquires a transmission upper limit bandwidth of the STA.
  • the transmission upper limit bandwidth of the STA refers to the maximum actual bandwidth that can be achieved by the STA and the AP during data transmission.
  • the upper transmission bandwidth of the STA may impose certain restrictions on the actual transmission bandwidth. For example, if the transmission upper bandwidth of the STA is smaller than the negotiated bandwidth with the STA, The actual transmission bandwidth of the AP and the STA cannot reach the transmission bandwidth selected based on the existing rate adaptation algorithm, resulting in a false high transmission bandwidth. The problem. Therefore, in this embodiment, after receiving the data transmission request of the STA, the bandwidth is not directly sent according to the negotiated bandwidth of the AP and the STA, but needs to be considered to limit the actual transmission bandwidth of the AP and the STA. The upper limit of the transmission bandwidth of the STA.
  • the sending module 804 is configured to: send the first MCS to the STA if the transmission upper limit bandwidth is smaller than the negotiated bandwidth; where the first MCS is smaller than the corresponding relationship between the bandwidth and the MCS and the negotiated bandwidth The MCS is greater than or equal to the MCS corresponding to the transmission upper limit bandwidth in the correspondence between the bandwidth and the MCS.
  • the correspondence between the bandwidth and the MCS reflects the relationship between the negotiation bandwidth of the AP and the STA and the MCS delivered by the AP to the STA.
  • the specific MCS is determined by the negotiation bandwidth of the AP and the STA. Therefore, the corresponding relationship between the bandwidth and the MCS is set in advance.
  • the adaptation algorithm determines the MCS corresponding to the negotiation bandwidth of the AP and the STA.
  • the existing bandwidth control table is a representation of the above correspondence.
  • the corresponding relationship may specifically be a correspondence under a specific communication standard, for example, a correspondence relationship under the IEEE 802. l la/b/g/n/ac standard.
  • the MCS corresponding to a certain bandwidth may be selected in the corresponding relationship between the bandwidth and the MCS, such as the bandwidth control table, and may be implemented in various manners. Only an alternative embodiment is illustrated below.
  • the MCS corresponding to a certain bandwidth may specifically be an MCS corresponding to the bandwidth of the bandwidth control table that is closest to the bandwidth and smaller than the bandwidth.
  • the sending module 804 directly delivers the MCS corresponding to the negotiation bandwidth of the AP and the STA, but the upper bandwidth of the STA also limits the actual transmission bandwidth of the AP and the STA, for example, when the bandwidth is If the MCS corresponding to the transmission upper bandwidth of the STA is smaller than the MCS corresponding to the negotiation bandwidth of the STA, the MCS corresponding to the negotiation bandwidth of the AP and the STA may be invalidated.
  • the MCS to be delivered is lower than the MCS corresponding to the negotiation bandwidth of the AP and the STA.
  • the reduced MCS must be greater than or equal to the MCS corresponding to the transmission upper bandwidth of the STA. Obviously, the MCS selected based on this method is more reasonable.
  • the MCS corresponding to the upper limit of the transmission upper limit bandwidth is satisfied, the smaller the MCS that is finally used for delivery, the problem that the transmission bandwidth is too high can be better solved, so the module is delivered. 804
  • the MCS corresponding to the upper limit bandwidth of the STA is sent to the STA.
  • the bandwidth selection when the bandwidth selection is performed in this embodiment, not only the negotiation bandwidth of the AP and the STA but also the upper limit bandwidth of the STA is considered, and when the transmission upper bandwidth of the STA is smaller than the negotiation bandwidth of the AP and the STA, If the MCS that is based on the AP and the STA negotiates the bandwidth is the same, the transmission bandwidth is too high. Therefore, the MCS is delivered, and the first MCS is sent to the STA. The first MCS is smaller than the corresponding relationship between the bandwidth and the MCS.
  • the MCS corresponding to the negotiation bandwidth of the AP and the STA is greater than or equal to the MCS corresponding to the transmission upper bandwidth in the corresponding relationship between the bandwidth and the MCS, so that in a scenario where some transmission bandwidths are falsely high, the bandwidth is reduced according to the transmission upper limit bandwidth of the STA.
  • the delivered MCS is used to reduce the transmission bandwidth of the delivered device. Therefore, the power consumption of the AP and STA devices is reduced, and the battery life is increased.
  • the existing rate adaptation algorithm when the transmission bandwidth of the transmission is reduced, the existing rate adaptation algorithm is not changed, so that it is simple and easy to implement, and does not increase the complexity and calculation amount of the algorithm, thereby ensuring the final bandwidth selection effect, and is applicable to Any of the prior art rate adaptive algorithms.
  • the sending module 804 determines that the transmission upper bandwidth of the STA is greater than or equal to the negotiation bandwidth of the AP and the STA, that is, the transmission bandwidth is not high, and the negotiation bandwidth of the AP and the STA is directly selected.
  • the corresponding MCS is sent to the STA.
  • the transmitting module performs data transmission based on the delivered first MCS and the STA.
  • the MCS corresponding to the negotiation bandwidth of the AP and the STA may be updated, for example, when the channel condition between the AP and the STA changes (for example, when the STA moves), at this time, the embodiment is
  • the AP further includes the transmission module and the judging module.
  • the judging module determines whether the MCS corresponding to the transmission upper bandwidth of the STA is smaller than the updated negotiation bandwidth. If yes, the first MCS is updated, and the sending module 804 is notified to send the updated STA to the STA.
  • the first MCS is smaller than the MCS corresponding to the updated negotiation bandwidth, and is greater than or equal to the MCS corresponding to the transmission upper bandwidth of the STA.
  • the MCS corresponding to the transmission upper limit bandwidth of the STA may also be updated, and in order to adapt to the update, the second obtaining module 803 and the sending module 804 may work cyclically.
  • the sending module 804 re-issues the first MCS, so that the final delivered bandwidth is adjusted in real time.
  • the AP determines the corresponding MCS according to the negotiation bandwidth and the transmission upper bandwidth respectively. The comparison of the negotiated bandwidth and the transmission upper limit bandwidth is realized by comparison of the MCS. This case will be described below by way of an embodiment.
  • an embodiment of the present invention provides a fifth embodiment of an AP.
  • the AP in this embodiment specifically includes: a first obtaining module 901, a receiving requesting module 902, a second obtaining module 903, a sending module 904, and a third.
  • the first obtaining module 901 is configured to obtain a negotiation bandwidth with the STA of the station.
  • the first obtaining module 901 in this embodiment may specifically
  • the first obtaining module 901 may specifically obtain the negotiation bandwidth with the STA according to the rate adaptive algorithm.
  • the third obtaining module 905 is configured to obtain a second MCS according to the negotiated bandwidth, where the second MCS is an MCS corresponding to the negotiated bandwidth in the correspondence between the bandwidth and the MCS.
  • the bandwidth control table shown in Table 1 if the negotiation bandwidth of the AP and the STA is specifically 40 Mbps, the bandwidth closest to 40 Mbps and less than 40 Mbps can be selected, that is, the MCS4 corresponding to 39 Mbps is the second corresponding to 40 Mbps. MCS.
  • the receiving request module 902 is configured to receive a data transmission request of the STA.
  • the second obtaining module 903 is configured to obtain, after the receiving request module receives the data transmission request, a transmission upper limit bandwidth of the STA.
  • the fourth obtaining module 906 is configured to obtain a third MCS according to the transmission upper limit bandwidth.
  • the third MCS is an MCS corresponding to the transmission upper limit bandwidth in the correspondence between the bandwidth and the MCS.
  • the bandwidth control table shown in Table 1 is used as an example. If the transmission upper limit bandwidth of the STA is specifically 20 Mbps, the bandwidth closest to 20 Mbps and less than 20 Mbps may be selected, that is, the MCS2 corresponding to 19.5 Mbps is corresponding to 20 Mbps. Third MCS.
  • the sending module 904 is configured to send the first MCS to the STA if the third MCS is smaller than the second MCS.
  • the second MCS is the MCS selected based on the negotiation rate of the AP and the STA
  • the third MCS is the MCS selected based on the transmission upper bandwidth of the STA.
  • the second MCS is directly delivered, but the upper transmission bandwidth of the STA also limits the actual transmission bandwidth of the AP and the STA. For example, when the third MCS is smaller than the second MCS, If the second MCS is delivered, the transmission bandwidth is too high. Therefore, the MCS to be delivered is reduced.
  • the first MCS is smaller than the second MCS.
  • the first MCS is greater than or equal to the third MCS.
  • the sending module 904 preferably uses the third MCS to the STA. Issued.
  • the bandwidth of the AP is not only considered by the AP and the STA, but also the bandwidth of the STA is determined according to the negotiation bandwidth of the AP and the STA and the upper bandwidth of the STA.
  • the bandwidth control table determines the second MCS and the third MCS.
  • the third MCS is smaller than the second MCS, it indicates that if the transmission is performed based on the second MCS, the transmission bandwidth is too high, so that the delivered MCS is lowered, and the STA is sent to the STA that is smaller than the second MCS and equal to or greater than the third MCS.
  • An MCS is implemented to reduce the final transmission of the MCS according to the transmission upper bandwidth of the STA in a scenario where the transmission bandwidth is too high. Therefore, the transmission bandwidth of the AP and the STA side device is reduced. Quantity, increase battery life.
  • the bandwidth of the AP is not only considered by the AP and the STA, but also the upper bandwidth of the STA is determined according to the negotiation bandwidth of the AP and the STA and the upper bandwidth of the STA.
  • the second MCS and the third MCS are out.
  • the third MCS is smaller than the second MCS, it indicates that if the transmission is performed based on the second MCS, the transmission bandwidth is too high, so that the delivered MCS is lowered, and the STA is sent to the STA that is smaller than the second MCS and equal to or greater than the third MCS.
  • An MCS is implemented to reduce the final transmission of the MCS according to the transmission upper bandwidth of the STA in a scenario where the transmission bandwidth is too high. Therefore, the transmission bandwidth of the AP and the STA side device is reduced. Quantity, increase battery life.
  • the present embodiment not only considers the negotiation bandwidth of the AP and the STA, but also considers the transmission upper limit bandwidth of the STA, thereby solving the problem that the transmission bandwidth is too high.
  • the corresponding MCS is selected based on the foregoing two bandwidths, and the final MCS is determined by comparing the MCS. In fact, it is also possible to compare the above two bandwidths first, and determine the final result based on the comparison result.
  • an embodiment of the present invention provides a sixth embodiment of an AP.
  • the AP in this embodiment specifically includes: a first obtaining module 1001, a receiving requesting module 1002, a second obtaining module 1003, a sending module 1004, and a fourth.
  • the module 1005 is obtained.
  • the first obtaining module 1001 is configured to acquire a negotiation bandwidth with the STA of the station;
  • the AP may first establish a path with the STA, or when the channel condition between the AP and the STA changes, for example, when the STA moves.
  • the first obtaining module 1001 may specifically obtain the negotiation bandwidth with the STA according to the rate adaptive algorithm.
  • the receiving request module 1002 is configured to receive a data transmission request of the STA.
  • the request may be sent by the STA or sent by the uplink of the AP.
  • the second obtaining module 1003 is configured to: after receiving the data transmission request, the receiving request module 1002 acquires a transmission upper limit bandwidth of the STA.
  • the fourth obtaining module 1005 is configured to obtain a third MCS according to the transmission upper limit bandwidth, where the third MCS is an MCS corresponding to the transmission upper limit bandwidth in the correspondence between the bandwidth and the MCS.
  • the correspondence between the bandwidth and the MCS reflects the correspondence between the negotiated bandwidth between the AP and the STA and the MCS sent by the AP to the STA.
  • One form of expression is the existing bandwidth control table.
  • the sending module 1004 is configured to send a third MCS to the STA if the upper transmission bandwidth is smaller than the negotiated bandwidth.
  • the corresponding MCS is not selected according to the foregoing two bandwidths, and then the MCS is compared, but the two bandwidths are compared first, and the upper transmission bandwidth of the STA is compared. If the negotiation bandwidth is smaller than that of the STA, it indicates that the transmission bandwidth is too high. Therefore, the smaller of the two bandwidths, that is, the MCS corresponding to the upper bandwidth of the STA is sent to the STA. It is also possible to avoid situations where the transmission bandwidth is too high.
  • the bandwidth of the STA is not only considered to be negotiated, but also the upper bandwidth of the STA is considered.
  • the upper bandwidth of the STA is smaller than the negotiated bandwidth of the STA, Select the MCS corresponding to the upper limit transmission bandwidth of the smaller STA.
  • the MCS that is finally delivered is reduced according to the upper bandwidth of the transmission, thereby reducing the transmission bandwidth that is delivered, thereby reducing the power consumption of the AP and STA devices. Life time.
  • the transmission bandwidth of the STA when the transmission upper bandwidth of the STA is smaller than the negotiated bandwidth of the STA, the transmission bandwidth does not necessarily have a virtual high.
  • the transmission upper bandwidth of the STA and the negotiated bandwidth with the STA may both correspond to the same MCS.
  • the MCS corresponding to the upper limit bandwidth of the smaller STA is selected for bandwidth delivery, it is guaranteed to avoid the virtual high bandwidth.
  • the sending module determines that the transmission upper bandwidth of the STA is greater than or equal to the negotiation bandwidth with the STA, that is, the transmission bandwidth is not high, and the negotiation bandwidth is sent to the STA. Corresponding MCS.
  • the embodiment of the present invention not only considers the negotiation bandwidth of the AP and the STA, but also considers the transmission upper limit bandwidth of the STA.
  • the transmission upper bandwidth of the STA may limit the actual transmission bandwidth of the AP and the STA, and may be obtained based on the transmission bandwidth of the AP uplink segment and/or the transmission requirement bandwidth of the STA.
  • the third embodiment of the method refer to the third embodiment of the method. The relevant points are not repeated here.
  • the MCS corresponding to the bandwidth that is closest to the upper bandwidth limit and smaller than the upper limit of the bandwidth may be selected.
  • the MCS can also be selected in the MCS corresponding to the transmission system.
  • the transmission system may be determined based on at least one of the following parameters: a channel frequency of the downlink segment, an open state of the short guard interval, and an I/O mode. For details, refer to the bandwidth selection method of the first embodiment and the third embodiment. Here, I will not repeat them here.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or Some features can be ignored or not executed.
  • the mutual coupling or direct connection or communication connection shown or discussed may be an indirect engagement or communication connection through some interface, device or unit, and may be in electrical, mechanical or other form.
  • the components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. medium.

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Abstract

本发明实施例提供了一种无线保真技术的带宽选择方法及AP，在所述方法中，AP获取与站点STA的协商带宽；所述方法包括：AP接收STA的数据传输请求；AP获取STA的传输上限带宽；若传输上限带宽小于协商带宽，AP向 STA下发第一MCS；第一MCS小于带宽与MCS的对应关系中与协商带宽对应的 MCS，大于等于带宽与MCS的对应关系中与传输上限带宽对应的MCS。可见本发明实施例不仅考虑了AP与STA的协商带宽，还考虑了STA的传输上限带宽，并在一些传输带宽虚高的场景下，根据STA的传输上限带宽降低最终下发的 MCS，从而实现了降低下发的传输带宽，因此减少接入点AP和站点STA侧设备的耗电量，增加续航时间。

Description

一种无线保真技术的带宽选择方法及接入点 AP 技术领域
本发明实施例涉及无线通信技术， 尤其是涉及一种无线保真技术的带宽 选择方法及接入点 AP。 背景技术
WiF i ( Wi re les s F ide l i ty, 即无线保真）技术是无线局域网的一个标准， 包括 AP ( Acces s Point , 接入点）和 STA (Sta t ion， 站点）组成的通信网络。 其中， AP—般称为网络桥接器或者接入点， 用于将 AP上行段的网络资源， 例 如 WAN (广域网）或者 LAN (局域网）的资源分配给 AP下行段， 即 AP和 STA之间 的通信网络。
目前， WiFi技术在带宽选择时， 主要釆用的是速率自适应算法： AP会根 据速率自适应算法获取到与 STA的协商带宽， 再根据与 STA的协商带宽从带 宽控制表中选择对应的 MCS ( Modula t ion and Coding Scheme , 调制与编码策 略）。 当 STA需要连接网络进行数据传输时， AP会向 STA下发上述过程中选择 的 MCS， 从而实现传输带宽的选择。
尽管目前存在大量的速率自适应算法， 并且各个速率自适应算法的输入 参数不尽相同， 具体计算方式也有一定的差异， 但是总体来说， 都是基于 AP 与 STA的信道质量， 例如 RSS I (接收信号强度）、 PSR (包传输成功率）、 PER (包传输失败率）等等计算与 STA 的协商带宽。 发明人经研究发现， 在进行 带宽选择时如果仅考虑上述信道质量， 往往考虑因素不全面， 尤其一些场景 下， AP和 STA之间的实际传输带宽并不能达到基于速率自适应算法所选择的 传输带宽， 此时传输带宽虚高， 进一步导致 AP和 STA侧设备的耗电量增大， 续航时间变短。 发明内容
本发明实施例解决的技术问题在于提供一种无线保真技术的带宽选择 方法及接入点 AP， 以实现在传输带宽虚高的场景下降低传输带宽， 从而减少 AP和 STA侧设备的耗电量， 增加续航时间。
为此， 本发明实施例解决技术问题的技术方案是：
第一方面， 本发明实施例提供了一种无线保真技术的带宽选择方法，接入 点 AP获取与站点 STA的协商带宽； 所述方法包括：
所述 AP接收所述 STA的数据传输请求；
所述 AP获取所述 STA的传输上限带宽；
若所述传输上限带宽小于所述协商带宽， 所述 AP向所述 STA下发第一调 制与编码策略 MCS; 其中， 所述第一 MCS小于带宽与 MCS的对应关系中与所述 协商带宽对应的 MCS， 大于等于所述带宽与 MCS的对应关系中与所述传输上限 带宽对应的 MCS。
在第一方面的第一种可能的实现方式中， 所述方法还包括：
根据所述协商带宽， 获取第二 MCS; 所述第二 MCS为所述带宽与 MCS的对 应关系中与所述协商带宽对应的 MCS；
根据所述传输上限带宽， 获取第三 MCS; 所述第三 MCS为所述带宽与 MCS 的对应关系中与所述传输上限带宽对应的 MCS;
所述若所述传输上限带宽小于所述协商带宽， 所述 AP向所述 STA下发第 一调制与编码策略 MCS， 包括：
若所述第三 MCS小于所述第二 MCS， 所述 AP向所述 STA下发第一 MCS。 结合第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现 方式中， 所述 AP向所述 STA下发第一 MCS， 包括： 所述 AP向所述 STA下发第 三 MCS。
在第一方面的第三种可能的实现方式中， 所述方法还包括：
根据所述传输上限带宽， 获取第三 MCS; 所述第三 MCS为所述带宽与 MCS 的对应关系中与所述传输上限带宽对应的 MCS;
所述 AP向所述 STA下发第一调制与编码策略 MCS， 包括： 所述 AP向所述
STA下发第三 MCS。
结合第一方面、第一方面的第一种至第三种任一种可能的实现方式，在第 一方面的第四种可能的实现方式中， 所述 STA的传输上限带宽基于所述 AP上 行段的传输带宽和 /或所述 STA的传输需求带宽获取。
结合第一方面的第四种可能的实现方式，在第一方面的第五种可能的实现 方式中， 所述 STA的传输上限带宽基于所述 AP上行段的传输带宽和所述 STA 的传输需求带宽获取， 包括：
所述 STA的传输上限带宽为所述 AP上行段的传输带宽和所述 STA的传输 需求带宽中数值较小的带宽。
结合第一方面的第四种或第五种可能的实现方式，在第一方面的第六种可 能的实现方式中， 所述 AP上行段的传输带宽的获取方式包括：
所述 AP获取为所述 AP上行段所分配的资源块大小；
所述 AP基于所述资源块大小获取所述 AP上行段的传输带宽。
结合第一方面的第四种或第五种可能的实现方式，在第一方面的第七种可 能的实现方式中， 所述 STA的传输需求带宽的获取方式包括：
所述 AP从所述数据传输请求中获取传输数据的业务类型；
所述 AP基于所述业务类型获取所述 STA的传输需求带宽。
结合第一方面、第一方面的第一种至第七种任一种可能的实现方式，在第 一方面的第八种可能的实现方式中， 所述方法还包括：
所述 AP基于所述第一 MCS与所述 STA传输数据；
若所述协商带宽对应的 MCS在传输数据的过程中发生更新， 所述 AP判断 传输上限带宽对应的 MCS是否小于更新后的协商带宽对应的 MCS， 如果是， 更 新第一 MCS并向所述 STA下发更新后的第一 MCS; 所述更新后的第一 MCS小于 所述更新后的协商带宽对应的 MCS，且大于等于所述传输上限带宽对应的 MCS。
第二方面， 本发明实施例提供了一种接入点 AP， 包括： 发送器、 接收器 和处理器； 所述发送器与所述处理器连接， 所述接收器与所述处理器连接； 所述接收器用于， 接收站点 STA的数据传输请求；
所述处理器用于， 获取所述 STA的协商带宽， 以及在所述接收器接收到所 述数据传输请求后， 获取所述 STA的传输上限带宽； 所述发送器用于， 若所述处理器确定所述传输上限带宽小于所述协商带 宽， 向所述 STA下发第一调制与编码策略 MCS; 其中， 所述第一 MCS小于带宽 与 MCS的对应关系中与所述协商带宽对应的 MCS， 大于等于所述带宽与 MCS的 对应关系中与所述传输上限带宽对应的 MCS。
在第二方面的第一种可能的实现方式中， 所述处理器还用于，根据所述协 商带宽获取第二 MCS，以及根据所述传输上限带宽获取第三 MCS;所述第二 MCS 为所述带宽与 MCS的对应关系中与所述协商带宽对应的 MCS; 所述第三 MCS为 所述带宽与 MCS的对应关系中与所述传输上限带宽对应的 MCS;
所述发送器用于若所述处理器确定所述传输上限带宽小于所述协商带宽， 向所述 STA下发第一调制与编码策略 MCS， 包括：
所述发送器用于若所述处理器确定所述第三 MCS小于所述第二 MCS， 向所 述 STA下发第一 MCS。
结合第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现 方式中， 所述发送器用于向所述 STA下发第一 MCS， 包括： 所述发送器用于向 所述 STA下发第三 MCS。
在第二方面的第三种可能的实现方式中， 所述处理器还用于，根据所述传 输上限带宽获取第三 MCS; 所述第三 MCS为所述带宽与 MCS的对应关系中与所 述传输上限带宽对应的 MCS;
所述发送器用于向所述 STA下发第一调制与编码策略 MCS， 包括： 所述发送器用于向所述 STA下发第三 MCS。
结合第二方面、第二方面的第一种至第三种任一种可能的实现方式，在第 二方面的第四种可能的实现方式中， 所述 STA的传输上限带宽基于所述 AP上 行段的传输带宽和 /或所述 STA的传输需求带宽获取。
结合第二方面的第四种可能的实现方式，在第二方面的第五种可能的实现 方式中， 所述 STA的传输上限带宽基于所述 AP上行段的传输带宽和所述 STA 的传输需求带宽获取， 包括：
所述 STA的传输上限带宽为所述 AP上行段的传输带宽和所述 STA的传输 需求带宽中数值较小的带宽。 结合第二方面的第四种或第五种可能的实现方式，在第二方面的第六种可 能的实现方式中， 所述 AP上行段的传输带宽的获取方式包括：
所述处理器获取为所述 AP上行段所分配的资源块大小；
所述处理器基于所述资源块大小获取所述 AP上行段的传输带宽。
结合第二方面的第四种或第五种可能的实现方式，在第二方面的第七种可 能的实现方式中， 所述 STA的传输需求带宽的获取方式包括：
所述处理器从所述数据传输请求中获取传输数据的业务类型；
所述处理器基于所述业务类型获取所述 STA的传输需求带宽。
结合第二方面、第二方面的第一种至第七种任一种可能的实现方式，在第 二方面的第八种可能的实现方式中， 所述接收器和所述发送器还用于，基于所 述第一 MCS与所述 STA传输数据；
所述处理器还用于，若所述协商带宽对应的 MCS在传输数据的过程中发生 更新， 判断传输上限带宽对应的 MCS是否小于更新后的协商带宽对应的 MCS， 如果是， 更新第一 MCS并通知所述发送器向所述 STA下发更新后的第一 MCS; 所述更新后的第一 MCS小于所述更新后的协商带宽对应的 MCS， 且大于等于所 述传输上限带宽对应的 MCS。
第三方面， 本发明实施例提供了一种接入点 AP， 包括：
第一获取模块， 用于获取与站点 STA的协商带宽；
接收请求模块， 用于接收所述 STA的数据传输请求；
第二获取模块， 用于所述接收请求模块接收到所述数据传输请求后， 获取 所述 STA的传输上限带宽；
下发模块， 用于若所述传输上限带宽小于所述协商带宽， 向所述 STA下发 第一调制与编码策略 MCS; 其中， 所述第一 MCS小于带宽与 MCS的对应关系中 与所述协商带宽对应的 MCS， 大于等于所述带宽与 MCS的对应关系中与所述传 输上限带宽对应的 MCS。
在第三方面的第一种可能的实现方式中， 还包括：
第三获取模块， 用于根据所述协商带宽， 获取第二 MCS; 所述第二 MCS为 所述带宽与 MCS的对应关系中与所述协商带宽对应的 MCS;
第四获取模块，用于根据所述传输上限带宽，获取第三 MCS;所述第三 MCS 为所述带宽与 MCS的对应关系中与所述传输上限带宽对应的 MCS;
所述下发模块用于若所述传输上限带宽小于所述协商带宽， 向所述 STA 下发第一调制与编码策略 MCS， 包括：
所述下发模块用于若所述第三 MCS小于所述第二 MCS， 向所述 STA下发第 一 MCS。
结合第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现 方式中， 所述下发模块用于向所述 STA下发第一 MCS， 包括：
所述下发模块用于向所述 STA下发第三 MCS。
在第三方面的第三种可能的实现方式中， 还包括：
第四获取模块，用于根据所述传输上限带宽，获取第三 MCS;所述第三 MCS 为所述带宽与 MCS的对应关系中与所述传输上限带宽对应的 MCS;
所述下发模块用于向所述 STA下发第一调制与编码策略 MCS， 包括： 所述下发模块用于向所述 STA下发第三 MCS。
结合第三方面、第三方面的第一种至第三种任一种可能的实现方式，在第 三方面的第四种可能的实现方式中， 所述 STA的传输上限带宽基于所述 AP上 行段的传输带宽和 /或所述 STA的传输需求带宽获取。
结合第三方面的第四种可能的实现方式，在第三方面的第五种可能的实现 方式中， 所述 STA的传输上限带宽基于所述 AP上行段的传输带宽和所述 STA 的传输需求带宽获取， 包括：
所述 STA的传输上限带宽为所述 AP上行段的传输带宽和所述 STA的传输 需求带宽中数值较小的带宽。
结合第三方面的第四种或第五种可能的实现方式，在第三方面的第六种可 能的实现方式中， 所述 AP上行段的传输带宽的获取方式包括：
所述第二获取模块获取为所述 AP上行段所分配的资源块大小；
所述第二获取模块基于所述资源块大小获取所述 AP上行段的传输带宽。 结合第三方面的第四种或第五种可能的实现方式，在第三方面的第七种可 能的实现方式中， 所述 STA的传输需求带宽的获取方式包括：
所述第二获取模块从所述数据传输请求中获取传输数据的业务类型； 所述第二获取模块基于所述业务类型获取所述 STA的传输需求带宽。 结合第三方面、第三方面的第一种至第七种任一种可能的实现方式，在第 三方面的第八种可能的实现方式中， 所述 AP还包括：
传输模块， 用于基于所述第一 MCS与所述 STA传输数据；
判断模块， 用于若所述协商带宽对应的 MCS 在传输数据的过程中发生更 新， 判断传输上限带宽对应的 MCS是否小于更新后的协商带宽对应的 MCS， 如 果是， 更新第一 MCS并通知所述下发模块向所述 STA下发更新后的第一 MCS ; 所述更新后的第一 MCS小于所述更新后的协商带宽对应的 MCS， 且大于等于所 述传输上限带宽对应的 MCS。
通过上述技术方案可知， 本发明实施例在进行带宽选择时， 不仅仅考虑了 接入点 AP与站点 STA的协商带宽， 还考虑了站点 STA的传输上限带宽， 并且 在一些传输带宽虚高的场景下，根据 STA的传输上限带宽降低最终下发的调制 编码策略 MCS， 从而实现了降低下发的传输带宽， 因此减少接入点 AP和站点 STA侧设备的耗电量， 增加续航时间。 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所 需要使用的附图作简要介绍， 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，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提 下， 还可以根据这些附图获得其他的附图。
图 1为本发明实施例提供的方法第一实施例的具体流程图；
图 2为本发明实施例提供的方法第二实施例的具体流程图；
图 3为本发明实施例提供的方法第三实施例的具体流程图；
图 4为本发明实施例提供的方法第四实施例的具体流程图；
图 5为本发明实施例提供的 AP第一实施例的结构示意图； 图 6为本发明实施例提供的 AP第二实施例的结构示意图；
图 7为本发明实施例提供的 AP第三实施例的结构示意图；
图 8为本发明实施例提供的 AP第四实施例的结构示意图；
图 9为本发明实施例提供的 AP第五实施例的结构示意图；
图 10为本发明实施例提供的 AP第六实施例的结构示意图。
具体实施方式
目前， WiFi技术在带宽选择时， 主要釆用的是速率自适应算法（也称为 Autor a te算法）： 当 AP与 STA初次建立通路时， 或者 AP与 STA之间的信道情 况发生变化时（例如 STA发生移动时）， AP会根据速率自适应算法获取到与 STA的协商带宽， 再根据与 STA的协商带宽从带宽控制表中选择对应的 MCS。 当 STA需要连接网络进行数据传输时， AP会接收到 STA的数据传输请求， 此 时 AP会向 STA下发上述过程中选择的 MCS， 从而实现传输带宽的选择。
尽管目前存在大量的速率自适应算法， 并且各个速率自适应算法的输入 参数不尽相同， 具体计算方式也有一定的差异， 但是总体来说， 都是基于 AP 与 STA的信道质量， 例如 RSSI、 PSR、 PER等等计算与 STA的协商带宽。
发明人经研究发现， 在进行带宽选择时如果仅考虑上述信道质量， 往往 考虑因素不全面， 尤其一些场景下由于存在某些限制， AP和 STA之间的实际 传输带宽并不能达到基于速率自适应算法所选择的传输带宽， 此时传输带宽 虚高， 进一步导致 AP和 STA侧设备的耗电量增大， 续航时间变短。
而在本发明实施例中， 提供一种 WiFi技术的带宽选择方法及接入点 AP， 以实现在传输带宽虚高的场景下降低传输带宽， 从而减少 AP和 STA侧设备的 耗电量， 增加续航时间。
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。
本发明的说明书和权利要求书及上述附图中的术语 "第一"、 "第二"、 "第 三" "第四" 等是用于区别类似的对象， 而不必用于描述特定的顺序或先后次 序。应该理解这样使用的数据在适当情况下可以互换， 以便这里描述的实施例 能够以除了在这里图示或描述的内容以外的顺序实施。 此外， 术语 "包括" 和 "具有" 以及他们的任何变形， 意图在于覆盖不排他的包含， 例如， 包含了一 系列步骤或单元的过程、 方法、 系统、 产品或设备不必限于清楚地列出的那些 步骤或单元， 而是可包括没有清楚地列出的或对于这些过程、 方法、 产品或设 备固有的其它步骤或单元。
方法实施例一
请参阅图 1， 本发明实施例提供了 WiFi技术的带宽选择方法的第一实施 例。 在本实施例中， AP获取与 STA的协商带宽。
本实施例 AP在获取与 STA的协商带宽时，具体可以发生在 AP与 STA初次 建立通路时， 或者 AP与 STA之间的信道情况发生变化时， 例如 STA发生移动 时。 这里， AP具体可以是根据速率自适应算法获取与 STA的协商带宽。 速率 自适应算法是现有技术中一种用于获取 AP与 STA的协商带宽的算法， 在具体 实现时， 首先由 AP获取 AP与 STA之间的信道质量， 例如 RSSI、 PSR、 PER等 参数， 之后根据获取到的信道质量， 利用任一种速率自适应算法计算出 AP与 STA的协商带宽。
本实施例具体包括：
S101 : AP接收 STA的数据传输请求。
当 STA需要连接网络进行数据传输时， AP会接收到 STA的数据传输请求。 其中， 该请求可以是由 STA发送的， 比如 STA侧的用户点击播放视频时， STA 会向 AP发送数据传输请求； 该请求也可以是由 AP的上行端发送的， 例如 WAN 侧或 LAN侧要向 STA推送数据时， 会向 AP发送 STA的数据传输请求。
S102: AP获取 STA的传输上限带宽。
在本发明实施例中， STA的传输上限带宽指的是 STA与 AP传输数据过程 中能够达到的最大实际带宽。
发明人经研究发现， 在一些应用场景下， STA的传输上限带宽会对实际的 传输带宽产生一定的限制，例如若 STA的传输上限带宽小于所述与 STA的协商 带宽， 则很有可能使得 AP与 STA的实际传输带宽不能达到基于现有的速率自 适应算法所选择的传输带宽，从而导致传输带宽虚高的问题。 因此在本实施例 中， 当接收到 STA的数据传输请求后， 并不会直接根据 AP与 STA的协商带宽 进行带宽下发， 而是需要考虑会对 AP与 STA的实际传输带宽起到限制作用的 STA的传输上限带宽。
S103: 若 STA的传输上限带宽小于 AP与 STA的协商带宽， AP向 STA下发 第一 MCS; 其中， 第一 MCS小于带宽与 MCS的对应关系中与 AP与 STA的协商 带宽对应的 MCS， 大于等于带宽与 MCS的对应关系中与 STA的传输上限带宽对 应的 MCS。
带宽与 MCS的对应关系反映了 AP与 STA的协商带宽和 AP向 STA下发的 MCS的对应关系。 目前， AP与 STA传输数据时只能基于几种固定的 MCS， 而具 体基于哪一个 MCS由 AP与 STA的协商带宽所决定， 因此， 目前都会预先设置 好带宽与 MCS的对应关系， 通过速率自适应算法等方式获取到 AP与 STA的协 商带宽后， 再从上述对应关系中确定出 AP与 STA的协商带宽所对应的 MCS。 例如， 现有的带宽控制表就是上述对应关系的一种表现形式。 这里， 上述对应 关系具体可以为是在特定的通信标准下的对应关系， 例如具体为 IEEE 802. l la/b/g/n/ac标准下的对应关系。
在带宽控制表等带宽与 MCS的对应关系中选择某一带宽对应的 MCS可以有 多种实施方式， 本发明实施例对比不做限定。 下面仅举例说明一种可选的实施 方式。
某一带宽所对应的 MCS， 具体可以为带宽控制表中， 与该带宽最接近的且 小于该带宽的带宽所对应的 MCS。例如表 1所示的带宽控制表中，包括多个 MCS， 每个 MCS都对应一特定带宽。 若 AP与 STA的协商带宽为 40Mbps,则可以选择 与 40Mbps最接近的， 并且小于 40Mbps的带宽， 即 39Mbps所对应的 MCS4作为 AP与 STA的协商带宽对应的第二 MCS。 表 1
MCS 带宽
(Mbps)
MCS 0 6. 5
MCS 1 13
MCS 2 19. 5
MCS 3 26
MCS 4 39
MCS 5 52 在现有技术中， AP会直接下发 AP与 STA的协商带宽对应的 MCS， 但是由 于 STA的传输上限带宽也会对 AP与 STA的实际传输带宽起到限制作用， 比如 当带宽与 MCS的对应关系中与 STA的传输上限带宽对应的 MCS小于 AP与 STA 的协商带宽对应的 MCS时， 说明此时若下发 AP与 STA的协商带宽对应的 MCS， 会导致传输带宽虚高， 因此， 需要降低下发的 MCS， 即下发的 MCS小于 AP与 STA的协商带宽对应的 MCS。但是为了避免无限制的降低 MCS而导致带宽过低， 影响传输效率， 因此降低后的 MCS， 必须大于或等于 STA的传输上限带宽对应 的 MCS。 显然基于这种方式所选择的 MCS， 更加合理。
为了方便理解， 下面通过一个具体实例进行说明。 若 AP与 STA的协商带 宽具体为 40Mbps， STA的传输上限带宽具体为 20Mbps， 则从表 1所示的带宽 控制表中选择出 AP与 STA的协商带宽对应的 MCS为 MC4， STA的传输上限带宽 对应的 MCS为 MCS2。由于 MCS2小于 MCS4 , 因此在本步骤中， AP选择小于 MCS4 并且大于等于 MCS2的 MCS， 即 MCS2或者 MCS3向 STA进行下发， 从而实现传 输带宽选择。 比如若选择 MCS2进行下发， 则最终 AP和 STA之间的传输带宽设 置为 MCS2对应的带宽， 即 19. 5 Mbps。
需要说明的是，在满足大于等于传输上限带宽对应的 MCS的前提下， 最终 用于下发的 MCS越小， 则能够更好地解决传输带宽虚高的问题， 因此本步骤中 优选 STA的传输上限带宽对应的 MCS向 STA进行下发。 通过上述技术方案可知， 本实施例在进行带宽选择时， 不仅仅考虑了 AP 与 STA的协商带宽，还考虑了 STA的传输上限带宽， 当 STA的传输上限带宽小 于 AP与 STA协商带宽时，说明如果基于 AP与 STA协商带宽对应的 MCS进行下 发很有可能会导致传输带宽虚高， 因此降低下发的 MCS， 向 STA下发第一 MCS， 第一 MCS小于带宽与 MCS的对应关系中与、 AP与 STA的协商带宽对应的 MCS， 大于等于带宽与 MCS的对应关系中与传输上限带宽对应的 MCS， 从而实现了在 一些传输带宽发生虚高的场景下， 根据 STA 的传输上限带宽降低最终下发的 MCS , 从而实现了降低下发的传输带宽， 因此减少 AP和 STA侧设备的耗电量， 增加续航时间。
实际上，现有技术中的速率自适应算法已经比较成熟， 算法也相对较为复 杂，如果对算法本身进行改变，则会导致算法复杂度进一步增加，计算量增大， 而且最终的带宽选择效果也 难进行预测。而本实施例中在降低下发的传输带 宽时， 并没有改变现有的速率自适应算法， 因此简单易行， 没有增加算法复杂 度和计算量， 能够保证最终的带宽选择效果， 而且适用于现有技术中任一种速 率自适应算法。
在本发明实施例中， 若在步骤 S103 中， STA的传输上限带宽大于或等于 AP与 STA的协商带宽， 也就是说并不会出现传输带宽虚高的问题， 因此直接 选择 AP与 STA的协商带宽对应的 MCS向 STA进行下发。
在本发明实施例中， 当在步骤 S103中执行了 MCS的下发之后， AP会基于 该步骤中下发的第一 MCS与 STA进行数据传输。 而在该数据传输的过程中， AP 与 STA的协商带宽对应的 MCS可能会发生更新， 比如当 AP与 STA之间的信道 情况发生变化时（例如 STA发生移动时）， AP会根据新的信道情况更新协商带 宽对应的 MCS， 此时 AP会判断 STA的传输上限带宽对应的 MCS是否小于更新 后的协商带宽， 如果是， 更新第一 MCS并向 STA下发更新后的第一 MCS; 更新 后的第一 MCS小于更新后的协商带宽对应的 MCS， 且大于等于 STA的传输上限 带宽对应的 MCS。
需要说明的是， 在本发明实施例中， STA的传输上限带宽对应的 MCS也有 可能发生更新， 而为了适应该更新， 本实施例可以循环执行步骤 S102至步骤 S103 , 或者也可以每次当 STA的传输上限带宽对应的 MCS发生更新后，都重新 执行步骤 S 1 03， 从而实现实时地对最终下发的带宽进行调整。
在本发明实施例中，可以是当 AP获取到 AP与 STA的协商带宽和 STA的传 输上限带宽后， 即分别根据协商带宽和传输上限带宽，在带宽与 MCS的对应关 系中确定出对应的 MCS,通过 MCS的比较实现对协商带宽和传输上限带宽的比 较， 下面通过一个实施例说明这种情况。
方法实施例二
请参阅图 2， 本发明实施例提供了 Wi F i技术的带宽选择方法的第二实施 例。 在本实施例中， AP获取与 STA的协商带宽， 根据所述协商带宽获取第二 MCS ; 第二 MCS为带宽与 MCS的对应关系中与所述协商带宽对应的 MCS。
以表 1 所示的带宽控制表举例说明， 若 AP 与 STA 的协商带宽具体为
40Mbp s , 则可以选择与 40Mbps最接近的， 并且小于 40Mbps的带宽， 即 39Mbps 所对应的 MCS4作为 40Mbps对应的第二 MCS。
本实施例具体包括：
S201 : AP接收 STA的数据传输请求。
该请求可以是由 STA发送的， 也可以是由 AP的上行端发送的。
S202 : AP获取 STA的传输上限带宽。
在本发明实施例中， STA的传输上限带宽指的是 STA与 AP传输数据过程 中能够达到的最大实际带宽。
S203 : 根据所述传输上限带宽， 获取第三 MCS ; 第三 MCS为带宽与 MCS的 对应关系中与所述传输上限带宽对应的 MCS。
以表 1 所示的带宽控制表举例说明， 若 STA 的传输上限带宽具体为 20Mbps，则可以选择与 20Mbps最接近的，并且小于 20Mbps的带宽，即 19. 5Mbps 所对应的 MCS2作为 20Mbps对应的第三 MCS。
S204 : 若第三 MCS小于第二 MCS， AP向 STA下发第一 MCS ; 第一 MCS小于 第二 MCS， 且大于等于第三 MCS。
第二 MCS是基于 AP与 STA的协商速率所选择的 MCS，第三 MCS是基于 STA 的传输上限带宽所选择的 MCS。 在现有技术中， 直接下发第二 MCS， 但是由于 STA的传输上限带宽也会对 AP与 STA的实际传输带宽起到限制作用， 比如说 当第三 MCS小于第二 MCS， 说明此时若下发第二 MCS会导致传输带宽虚高， 因 此， 需要降低下发的 MCS， 选择小于第二 MCS， 大于等于第三 MCS的第一 MCS 进行下发。
为了方便理解， 下面通过一个具体实例进行说明。若与 STA的协商带宽具 体为 40Mbps， STA的传输上限带宽具体为 20Mbps， 则从表 1所示的带宽控制 表中选择出对应的第二 MCS为 MC4， 第三 MCS为 MCS2。 由于 MCS2小于 MCS4， 因此在本步骤中，选择小于 MCS4并且大于等于 MCS2的 MCS，即 MCS2或者 MCS3 向 STA进行下发， 从而实现传输带宽选择。 比如若选择 MCS2进行下发， 则最 终 AP和 STA之间的传输带宽设置为 MCS2对应的带宽， 即 19. 5 Mbps。
需要说明的是， 在满足大于等于第三 MCS的前提下， 最终用于下发的 MCS 越小， 则能够更好地解决传输带宽虚高的问题， 因此本步骤中优选第三 MCS 向 STA进行下发。
通过上述技术方案可知， 本实施例在进行带宽选择时， 不仅仅考虑了 AP 与 STA的协商带宽， 还考虑了 STA的传输上限带宽， 分别根据 AP与 STA的协 商带宽和 STA的传输上限带宽在带宽控制表确定出第二 MCS和第三 MCS。 当第 三 MCS小于第二 MCS时，说明如果基于第二 MCS进行下发将会导致传输带宽虚 高， 因此降低下发的 MCS， 向 STA下发小于第二 MCS并且大于等于第三 MCS的 第一 MCS， 从而实现了在一些传输带宽发生虚高的场景下， 根据 STA的传输上 限带宽降低最终下发的 MCS， 从而实现了降低下发的传输带宽， 因此减少 AP 和 STA侧设备的耗电量， 增加续航时间。
本实施例相比于现有技术， 不仅仅考虑了根据速率自适应算法获取的与 STA的协商带宽， 还考虑了 STA的传输上限带宽。 其中 STA的传输上限带宽会 对 AP与 STA的实际传输带宽起到限制作用，具体可以基于 AP上行段的传输带 宽和 /或 STA的传输需求带宽获取， 下面通过一个实施例加以详细说明。
方法实施例三
请参阅图 3， 本发明实施例提供了 WiFi技术的带宽选择方法的第三实施 例， 本实施例重点描述了 STA的传输上限带宽的获取方式。 需要说明的是， 本 实施例在描述 STA的传输上限带宽的获取方式时，以方法第二实施例对应的场 景为例，实际上本实施例中 STA的传输上限带宽的获取方式具体还可以用于本 发明实施例提供的其他实施例中。
在本实施例中， AP根据速率自适应算法等方式获取与 STA的协商带宽， 根据所述协商带宽获取第二 MCS; 第二 MCS为带宽与 MCS的对应关系中与所述 协商带宽对应的 MCS。
在一些情况下， 不同的传输制式中， 带宽和 MCS的对应关系不同。 因此本 实施例中在获取第二 MCS时， 可以是在传输制式所对应的 MCS中选择。 其中， 传输制式可以由以下参数中的至少一项参数确定： 信道频率资源、短防护间隔 的开启状态、 I/O (输入 /输出）模式。 下面通过一个实例加以说明。
例如表 2所示的带宽控制表， 传输制式包括： 信道频率资源、短防护间隔 的开启状态以及 I/O 模式。 其中信道频率资源包括 20MHz 信道频率资源和 40MHz 信道频率资源两种类型， 短防护间隔的开启状态包括未开启短防护间 隔和开启短防护间隔两种类型， I/O 模式包括 SIS0 ( S ing le Input S ing le Output , 即单入单出）、 2 X 2MIM0 ( Mul t iple Input Mul t iple Output , 即 多入多出）两种类型。 因此在获取所述协商带宽对应的第二 MCS时， 首先需要 确定对应的传输制式。 例如所述协商带宽为 40MHz， 信道频率资源为 20MHz， 未开启短防护间隔、 I/O模式为 SI S0时， 在对应的传输制式中确定出 40MHz 对应的 MCS为 MCS4。
表 2
20MHz信道频率资源 40MHz信道频率资源
S I S0 2 X 2MIM0 S I S0 2 X 2MIM0 未开启短防 MCS0 6. 5 MCS0 1 3 MCS0 13. 5 MCS0 27 护间隔 MCS1 13 MCS1 26 MCS1 27 MCS1 54
MCS2 19. 5 MCS2 39 MCS2 40. 5 MCS2 81
MCS 3 26 MCS3 52 MCS3 54 MCS 3 108
MCS4 39 MCS4 78 MCS4 80 MCS4 162 MCS5 52 MCS5 104 MCS5 108 MCS5 216 开启短防护 MCS0 7. 2 MCS0 14. 4 MCS0 15 MCS0 30 间隔 MCS1 14. 4 MCS1 28. 9 MCS1 30 MCS1 60
MCS2 21. 7 MCS2 43. 3 MCS2 45 MCS2 90 本实施例具体包括：
S301 : AP接收 STA的数据传输请求。
该请求可以是由 STA发送的， 也可以是由 AP的上行端发送的。
S302: AP获取 STA的传输上限带宽。
在本发明实施例中， STA的传输上限带宽可以基于 AP上行段的传输带宽 和 /或 STA的传输需求带宽获取。 下面分三种情况分别说明。
第一种情况， 基于 AP上行段的传输带宽获取 STA的传输上限带宽。
AP上行段的传输带宽指的是 AP上行段在传输数据时协商出的传输带宽。 目前， AP在进行上行段的数据传输时，一般是由 AP的上行端（WAN侧或者 LAN 侧 )获取与 AP之间的信道质量，根据该信道质量协商出 AP与上行端之间的传 输带宽。
在本发明实施例中， 虽然最终实现的是 AP向 STA下发带宽， 也就是 AP 下行段的带宽选择。 但是由于 AP需要从上行段获取资源， 以实现与下行段之 间的数据传递， 因此， 上行段的传输带宽也会对下行段的传输带宽起到一定的 限制作用。而在现有技术中，上行段和下行段在进行带宽选择时是分开进行的， 因此下行段的带宽选择只基于下行段的信道质量， 并不考虑上行段的相关情 况， 显然这种方式考虑因素不全面。
本发明实施例中， 可以在进行下行段的带宽选择时，将上行端的传输带宽 考虑进来， 例如可以直接将 AP上行段的传输带宽作为 STA的传输上限带宽。 其中 AP上行段的传输带宽的具体获取方式， 在本发明实施例中不作限定， 下 面仅举例说明几种可行的方式。
AP上行段的传输带宽的获取方式可以包括： AP获取为 AP上行段所分配的 资源块大小； AP根据该资源块大小获取 AP上行段的传输带宽。 该方式具体可 以用于上行端为 WAN侧的情况。 当 AP接收到 STA的数据传输请求时， WAN侧 也需要为 AP下发一个传输速率， 因此 WAN侧会根据与 AP的信道情况为 AP分 配资源块， 因此根据分配的资源块的大小， 就能计算出 AP上行段的传输带宽。 其中， 该资源块的大小可以从 modem (调制解调器） 中直接读出。
AP 上行段的传输带宽的获取方式还可以通过测速的方式得出， 该方式具 体可以用于上行端为 WAN侧或者 LAN侧的情况。 比如， 通过在 AP上行段安装 测试软件， 或者根据测试网站都能够获取到 AP上行段的实际传输速率， 从而 作为 AP上行段的传输带宽。
第二种情况， 基于 STA的传输需求带宽获取 STA的传输上限带宽。
在现有技术中， 由于都是根据速率自适应算法实现下发带宽， 其中速率自 适应算法的输入参数为 AP与 STA的信道质量， 例如 RSS I、 PSR、 PER等参数， 并没有考虑到 STA传输数据时对带宽的具体需求， 即 STA的传输需求带宽，显 然这种方式考虑因素不全面。
本发明实施例中，可以直接将 STA的传输需求带宽作为 STA的传输上限带 宽。其中， STA的传输需求带宽的具体获取方式，在本发明实施例中不作限定， 下面仅举例说明一种可行的方式。
STA的传输需求带宽的获取方式可以包括： AP从数据传输请求中获取传输 数据的业务类型； AP基于所述业务类型获取 STA的传输需求带宽。 当 AP接收 到数据传输请求时， 该请求中一般都包括有 STA的传输数据的业务类型， 比如 是视频、 图片还是文本数据， 如果是视频数据， 是高清视频还是标清视频。 而 根据该业务类型， 就能计算出传输需求带宽。
第三种情况， 基于 AP上行段的传输带宽和 STA的传输需求带宽获取。 在这种情况时， 一般是将 AP上行段的传输带宽和 STA的传输需求带宽中 数值较小的带宽， 作为 STA的传输上限带宽。 例如， AP上行段的传输带宽为 25Mbp s , STA的传输需求带宽为 20Mbp s， 则最终确定出 STA的传输上限带宽 具体为 2 0Mbp s。
其中， AP上行段的传输带宽的具体获取方式， 以及 STA的传输需求带宽 的具体获取方式， 请分别参见第一种情况和第二种情况， 这里不再赘述。
S 30 3 : 根据所述传输上限带宽， 获取第三 MCS ; 第三 MCS为带宽与 MCS的 对应关系中与所述传输上限带宽对应的 MCS。 与选择第二 MCS的过程类似， 本步骤在选择第三 MCS时，也可以是在传输 制式中所对应的 MCS中选择。 具体过程请参见选择第二 MCS的过程。
S304: 若第三 MCS小于第二 MCS， AP向 STA下发第一 MCS; 第一 MCS小于 第二 MCS， 且大于等于第三 MCS。
本步骤中 AP优选下发第三 MCS。
通过上述技术方案可知，本实施例中具体说明了获取 STA的传输上限带 宽的几种可选的方式。 当然， 本发明实施例中对该传输上限带宽的获取方 上述两个实施例在实现带宽选择时， 不仅仅考虑了 AP与 STA的协商带 宽， 而且还考虑了 STA的传输上限带宽， 从而解决了传输带宽虚高的问题。 具 体实现时是先基于上述两个带宽选择出对应的 MCS， 在对 MCS进行比较确定最 终下发的 MCS。 而实际上， 也可以是先比较上述两个带宽， 根据比较结果确定 最终下发的 MCS。 下面通过一个实施例进行说明。
方法实施例四
请参阅图 4， 本发明实施例提供了 WiFi技术的带宽选择方法的第四实施 例， 在本实施例中， AP获取与 STA的协商带宽。
本实施例在获取与 STA的协商带宽时， 具体可以发生在 AP与 STA初次建 立通路时， 或者 AP与 STA之间的信道情况发生变化时， 例如 STA发生移动时。 这里， AP具体可以是根据速率自适应算法获取与 STA的协商带宽。
本实施例具体包括：
S401 : AP接收 STA的数据传输请求。
该请求可以是由 STA发送的， 也可以是由 AP的上行端发送的。
S402: AP获取 STA的传输上限带宽。
在本发明实施例中， STA的传输上限带宽指的是 STA与 AP传输数据过程 中能够达到的最大实际带宽。
S403: 根据所述 STA的传输上限带宽， 获取第三 MCS; 第三 MCS为带宽与 MCS的对应关系中与所述 STA的传输上限带宽对应的 MCS。
带宽与 MCS的对应关系反映了 AP和 STA之间的协商带宽与 AP向 STA下发 的 MCS的对应关系。 其一种表现形式为现有的带宽控制表。
S404: 若所述 STA的传输上限带宽小于所述与 STA的协商带宽， AP向 STA 下发第三 MCS。
需要说明的是，本实施例中可以是当确定出 STA的传输上限带宽小于所述 与 STA的协商带宽时， 才执行步骤 S403。
与方法第二实施例不同的是，本实施例不再是先根据上述两个带宽选择对 应的 MCS， 再对 MCS进行比较， 而是先比较上述两个带宽， 若比较出 STA的传 输上限带宽小于与 STA的协商带宽，则说明此时有可能会出现传输带宽虚高的 情况， 因此选择上述两个带宽中较小的带宽， 即 STA的传输上限带宽所对应的 MCS向 STA进行下发， 也能够实现避免传输带宽虚高的情况出现。
为了方便理解，下面通过一个具体实例进行说明。带宽控制表如表 1所示， 若与 STA的协商带宽为 40Mbps， STA的传输上限带宽为 20Mbps， 显然， STA 的传输上限带宽小于与 STA的协商带宽， 因此选择 STA的传输上限带宽， 即 20Mbps所对应的 MCS2进行带宽下发。
需要说明的是，本实施例中与方法第一实施例至方法第三实施例的相似之 处请参见上述三个实施例， 这里不再赘述。
通过上述技术方案可知，本实施例在进行带宽选择时， 不仅仅考虑了获取 的与 STA的协商带宽，还考虑了 STA的传输上限带宽， 当 STA的传输上限带宽 小于与 STA的协商带宽时，选择较小的 STA的传输上限带宽对应的 MCS进行下 发，从而实现了在一些传输带宽发生虚高的场景下，根据传输上限带宽降低最 终下发的 MCS， 从而实现了降低下发的传输带宽， 因此减少 AP和 STA侧设备 的耗电量， 增加续航时间。
需要说明的是， 当 STA的传输上限带宽小于与 STA的协商带宽时，传输带 宽并不一定发生虚高， 例如， 此时 STA的传输上限带宽和与 STA的协商带宽可 能都对应同一 MCS。 但是只要是选择较小的 STA的传输上限带宽对应的 MCS进 行带宽下发， 则一定能够保证在避免带宽虚高的情况出现。
在本发明实施例中， 在步骤 S403中， 若 STA的传输上限带宽大于或等于 与 STA的协商带宽， 也就是说并不会出现传输带宽虚高的问题， 因此 AP在带 宽控制表中选择所述与 STA的协商带宽对应的 MCS向 STA进行下发。 本实施例相比于现有技术， 不仅仅考虑了 AP与 STA的协商带宽， 还考虑 了 STA的传输上限带宽。 其中 STA的传输上限带宽会对 AP与 STA的实际传输 带宽起到限制作用，具体可以基于 AP上行段的传输带宽和 /或 STA的传输需求 带宽获取， 具体获取方式请参见方法第三实施例的相关之处， 这里不再赘述。
本实施例选择 STA的传输上限带宽所对应的 MCS时， 可以是选择与该 带宽上限最接近的且小于该带宽上限的带宽所对应的 MCS。 此外， MCS还可以 在传输制式所对应的 MCS 中选择。 传输制式可以基于以下参数中的至少一 项参数确定： 下行段的信道频率、 短防护间隔的开启状态、 I /O 模式， 具 体请参见带宽选择方法第一实施例和第三实施例的相关之处， 这里不再赘 述。
上面对本发明实施例中的带宽选择方法的实施例进行了描述，下面将从硬 件处理的角度对本发明实施例中的 AP的实施例进行描述。
装置实施例一
请参阅图 5， 本发明实施例提供了 AP的第一实施例， 本实施例的 AP具体 包括： 接收器 501、 处理器 502和发送器 503。
发送器 503与处理器 502连接， 接收器 501与处理器 502连接。 其中， 处 理器 502可以是通过总线或者其他方式与发送器 503和接收器 501连接。其中 图 5中以通过总线连接为例。
接收器 501用于， 接收 STA的数据传输请求。
当 STA需要连接网络进行数据传输时，接收器 501会接收到 STA的数据传 输请求。 其中， 该请求可以是由 STA发送的， 比如 STA侧的用户点击播放视频 时， STA会向接收器 501发送数据传输请求； 该请求也可以是由 AP的上行端 发送的， 例如 WAN侧或 LAN侧要向 STA推送数据时， 会向接收器 501发送 STA 的数据传输请求。
处理器 502用于， 获取 STA的协商带宽， 以及在接收器 501接收到数据传 输请求后， 获取 STA的传输上限带宽。
本实施例处理器 502在获取与 STA的协商带宽时， 具体可以发生在 AP与 STA初次建立通路时， 或者 AP与 STA之间的信道情况发生变化时， 例如 STA 发生移动时。 这里， 处理器 502 具体可以是根据速率自适应算法获取与 STA 的协商带宽。
在本发明实施例中， STA的传输上限带宽指的是 STA与 AP传输数据过程 中能够达到的最大实际带宽。 发明人经研究发现， 在一些应用场景下， STA的 传输上限带宽会对实际的传输带宽产生一定的限制，例如若 STA的传输上限带 宽小于所述与 STA的协商带宽， 则 4艮有可能使得 AP与 STA的实际传输带宽不 能达到基于现有的速率自适应算法所选择的传输带宽，从而导致传输带宽虚高 的问题。 因此在本实施例中， 当接收到 STA的数据传输请求后， 并不会直接根 据 AP与 STA的协商带宽进行带宽下发，而是需要考虑会对 AP与 STA的实际传 输带宽起到限制作用的 STA的传输上限带宽。
发送器 503用于，若处理器 502确定所述传输上限带宽小于所述协商带宽， 向 STA下发第一 MCS; 其中， 第一 MCS小于带宽与 MCS的对应关系中与所述协 商带宽对应的 MCS， 大于等于所述带宽与 MCS的对应关系中与所述传输上限带 宽对应的 MCS。
带宽与 MCS的对应关系反映了 AP与 STA的协商带宽和 AP向 STA下发的 MCS的对应关系。 目前， AP与 STA传输数据时只能基于几种固定的 MCS， 而具 体基于哪一个 MCS由 AP与 STA的协商带宽所决定， 因此， 目前都会预先设置 好带宽与 MCS的对应关系， 通过速率自适应算法等方式获取到 AP与 STA的协 商带宽后， 再从上述对应关系中确定出 AP与 STA的协商带宽所对应的 MCS。 例如， 现有的带宽控制表就是上述对应关系的一种表现形式。 这里， 上述对应 关系具体可以为是在特定的通信标准下的对应关系， 例如具体为 IEEE 802. l la/b/g/n/ac标准下的对应关系。
在带宽控制表等带宽与 MCS的对应关系中选择某一带宽对应的 MCS可以有 多种实施方式， 本发明实施例对比不做限定。 下面仅举例说明一种可选的实施 方式。 某一带宽所对应的 MCS， 具体可以为带宽控制表中， 与该带宽最接近的 且小于该带宽的带宽所对应的 MCS。
在现有技术中， 发送器 503会直接下发 AP与 STA的协商带宽对应的 MCS， 但是由于 STA的传输上限带宽也会对 AP与 STA的实际传输带宽起到限制作用， 比如当带宽与 MCS的对应关系中与 STA的传输上限带宽对应的 MCS小于 AP与 STA的协商带宽对应的 MCS时， 说明此时若下发 AP与 STA的协商带宽对应的 MCS , 会导致传输带宽虚高， 因此， 需要降低下发的 MCS， 即下发的 MCS小于 AP与 STA的协商带宽对应的 MCS。但是为了避免无限制的降低 MCS而导致带宽 过低， 影响传输效率， 因此降低后的 MCS， 必须大于或等于 STA的传输上限带 宽对应的 MCS。 显然基于这种方式所选择的 MCS， 更加合理。
为了方便理解， 下面通过一个具体实例进行说明。 若 AP与 STA的协商带 宽具体为 40Mbps， STA的传输上限带宽具体为 20Mbps， 则从表 1所示的带宽 控制表中选择出 AP与 STA的协商带宽对应的 MCS为 MC4， STA的传输上限带宽 对应的 MCS为 MCS2。 由于 MCS2小于 MCS4， 因此发送器 503向 STA下发小于 MCS4并且大于等于 MCS2的 MCS， 即 MCS2或者 MCS3， 从而实现传输带宽选择。 比如若选择 MCS2进行下发， 则最终 AP和 STA之间的传输带宽设置为 MCS2对 应的带宽， 即 19. 5 Mbps。
需要说明的是，在满足大于等于传输上限带宽对应的 MCS的前提下， 最终 用于下发的 MCS 越小， 则能够更好地解决传输带宽虚高的问题， 因此发送器 503优选 STA的传输上限带宽对应的 MCS向 STA进行下发。
通过上述技术方案可知， 本实施例在进行带宽选择时， 不仅仅考虑了 AP 与 STA的协商带宽，还考虑了 STA的传输上限带宽， 当 STA的传输上限带宽小 于 AP与 STA协商带宽时，说明如果基于 AP与 STA协商带宽对应的 MCS进行下 发很有可能会导致传输带宽虚高， 因此降低下发的 MCS， 向 STA下发第一 MCS， 第一 MCS小于带宽与 MCS的对应关系中与、 AP与 STA的协商带宽对应的 MCS， 大于等于带宽与 MCS的对应关系中与传输上限带宽对应的 MCS， 从而实现了在 一些传输带宽发生虚高的场景下， 根据 STA 的传输上限带宽降低最终下发的 MCS , 从而实现了降低下发的传输带宽， 因此减少 AP和 STA侧设备的耗电量， 增加续航时间。
而本实施例中在降低下发的传输带宽时，并没有改变现有的速率自适应算 法， 因此简单易行， 没有增加算法复杂度和计算量， 能够保证最终的带宽选择 效果， 而且适用于现有技术中任一种速率自适应算法。
在本发明实施例中， 处理器 502可能是一个中央处理器 CPU, 或者是特定 集成电路 AS IC ( App l i ca t ion Spec i f i c Integra ted C i rcui t ), 或者是被酉己 置成实施本申请实施例的一个或多个集成电路。本发明实施例还可以包括存储 器， 存储器用于存放程序。 存储器可能包含高速 RAM存储器， 也可能还包括非 易失性存储器（non- vo la t i l e memory ), 例如至少一个磁盘存储器。
在本发明实施例中， 若处理器 502确定 STA的传输上限带宽大于或等于
AP与 STA的协商带宽， 也就是说并不会出现传输带宽虚高的问题， 因此发送 器 503直接选择 AP与 STA的协商带宽对应的 MCS向 STA进行下发。
在本发明实施例中， 当发送器 503执行了 MCS 的下发之后， 发送器 503 和接收器 501会基于下发的第一 MCS与 STA进行数据传输。而在该数据传输的 过程中， AP与 STA的协商带宽对应的 MCS可能会发生更新， 比如当 AP与 STA 之间的信道情况发生变化时（例如 STA发生移动时）， 处理器 502会根据新的 信道情况更新协商带宽对应的 MCS， 此时处理器 502会判断 STA的传输上限带 宽对应的 MCS是否小于更新后的协商带宽，如果是， 更新第一 MCS并通知发送 器 503向 STA下发更新后的第一 MCS; 更新后的第一 MCS小于更新后的协商带 宽对应的 MCS， 且大于等于 STA的传输上限带宽对应的 MCS。
需要说明的是， 在本发明实施例中， STA的传输上限带宽对应的 MCS也有 可能发生更新， 而为了适应该更新， 处理器 502和发送器 503可以循环执行获 取 STA的传输上限带宽以及下发第一 MCS。 或者也可以每次当 STA的传输上限 带宽对应的 MCS发生更新后， 发送器 503都重新下发第一 MCS， 从而实现实时 地对最终下发的带宽进行调整。
在本发明实施例中，可以是当 AP获取到 AP与 STA的协商带宽和 STA的传 输上限带宽后， 即分别根据协商带宽和传输上限带宽，在带宽与 MCS的对应关 系中确定出对应的 MCS,通过 MCS的比较实现对协商带宽和传输上限带宽的比 较， 下面通过一个实施例说明这种情况。
装置实施例二
请参阅图 6， 本发明实施例提供了 AP的第二实施例， 本实施例的 AP具体 包括： 接收器 601、 处理器 602和发送器 603。
发送器 603与处理器 602连接， 接收器 601与处理器 602连接。 接收器 601用于接收 STA的数据传输请求。
该请求可以是由 STA发送的， 也可以是由 AP的上行端发送的。
处理器 602用于， 获取与 STA的协商带宽， 根据所述协商带宽获取第二 MCS; 在接收器 601接收到数据传输请求后， 获取 STA的传输上限带宽， 根据 所述传输上限带宽获取第三 MCS。 其中， 第二 MCS为带宽与 MCS的对应关系中 与所述协商带宽对应的 MCS; 第三 MCS为带宽与 MCS的对应关系中与所述传输 上限带宽对应的 MCS。
本实施例处理器 602在获取与 STA的协商带宽时， 具体可以发生在 AP与 STA初次建立通路时， 或者 AP与 STA之间的信道情况发生变化时， 例如 STA 发生移动时。 这里， 处理器 602 具体可以是根据速率自适应算法获取与 STA 的协商带宽。
以表 1 所示的带宽控制表举例说明， 若 AP 与 STA 的协商带宽具体为 40Mbps , 则可以选择与 40Mbps最接近的， 并且小于 40Mbps的带宽， 即 39Mbps 所对应的 MCS4作为 40Mbps对应的第二 MCS。 若 STA的传输上限带宽具体为 20Mbps，则可以选择与 20Mbps最接近的，并且小于 20Mbps的带宽，即 19. 5Mbps 所对应的 MCS2作为 20Mbps对应的第三 MCS。
发送器 603用于， 若处理器 602确定第三 MCS小于第二 MCS， 向所述 STA 下发第一 MCS。 第一 MCS小于第二 MCS， 且大于等于第三 MCS。
第二 MCS是基于 AP与 STA的协商速率所选择的 MCS，第三 MCS是基于 STA 的传输上限带宽所选择的 MCS。 在现有技术中， 直接下发第二 MCS， 但是由于 STA的传输上限带宽也会对 AP与 STA的实际传输带宽起到限制作用， 比如说 当第三 MCS小于第二 MCS， 说明此时若下发第二 MCS会导致传输带宽虚高， 因 此， 需要降低下发的 MCS， 选择小于第二 MCS， 大于等于第三 MCS的第一 MCS 进行下发。
需要说明的是， 在满足大于等于第三 MCS的前提下， 最终用于下发的 MCS 越小， 则能够更好地解决传输带宽虚高的问题， 因此发送器 603优选第三 MCS 向 STA进行下发。
通过上述技术方案可知， 本实施例在进行带宽选择时， 不仅仅考虑了 AP 与 STA的协商带宽， 还考虑了 STA的传输上限带宽， 分别根据 AP与 STA的协 商带宽和 STA的传输上限带宽确定出第二 MCS和第三 MCS。 当第三 MCS小于第 二 MCS时，说明如果基于第二 MCS进行下发将会导致传输带宽虚高， 因此降低 下发的 MCS， 向 STA下发小于第二 MCS并且大于等于第三 MCS的第一 MCS， 从 而实现了在一些传输带宽发生虚高的场景下，根据 STA的传输上限带宽降低最 终下发的 MCS， 从而实现了降低下发的传输带宽， 因此减少 AP和 STA侧设备 的耗电量， 增加续航时间。
本实施例在实现带宽选择时， 不仅仅考虑了 AP与 STA的协商带宽， 而 且还考虑了 STA的传输上限带宽，从而解决了传输带宽虚高的问题。具体实现 时是先基于上述两个带宽选择出对应的 MCS， 在对 MCS进行比较确定最终下发 的 MCS。 而实际上， 也可以是先比较上述两个带宽， 根据比较结果确定最终下 发的 MCS。 下面通过一个实施例进行说明。
装置实施例三
请参阅图 7， 本发明实施例提供了 AP的第三实施例， 本实施例的 AP具体 包括： 接收器 701、 处理器 702和发送器 703。
发送器 703与处理器 702连接， 接收器 701与处理器 702连接。
接收器 701用于， 接收 STA的数据传输请求。
该请求可以是由 STA发送的， 也可以是由 AP的上行端发送的。
处理器 702用于， AP获取与 STA的协商带宽， 以及在接收器 701接收到 数据传输请求后， 获取 STA的传输上限带宽，根据所述传输上限带宽获取第三 MCS; 第三 MCS为带宽与 MCS的对应关系中与所述传输上限带宽对应的 MCS。
本实施例处理器 702在获取与 STA的协商带宽时， 具体可以发生在 AP与 STA初次建立通路时， 或者 AP与 STA之间的信道情况发生变化时， 例如 STA 发生移动时。 这里， 处理器 702 具体可以是根据速率自适应算法获取与 STA 的协商带宽。
带宽与 MCS的对应关系反映了 AP和 STA之间的协商带宽与 AP向 STA下发 的 MCS的对应关系。 其一种表现形式为现有的带宽控制表。
发送器 703用于，若所述 STA的传输上限带宽小于所述与 STA的协商带宽， AP向 STA下发第三 MCS。
与装置第二实施例不同的是，本实施例不再是先根据上述两个带宽选择对 应的 MCS， 再对 MCS进行比较， 而是先比较上述两个带宽， 若比较出 STA的传 输上限带宽小于与 STA的协商带宽，则说明此时有可能会出现传输带宽虚高的 情况， 因此选择上述两个带宽中较小的带宽， 即 STA的传输上限带宽所对应的 MCS向 STA进行下发， 也能够实现避免传输带宽虚高的情况出现。
通过上述技术方案可知， 本实施例在进行带宽选择时， 不仅仅考虑了获取 的与 STA的协商带宽，还考虑了 STA的传输上限带宽， 当 STA的传输上限带宽 小于与 STA的协商带宽时，选择较小的 STA的传输上限带宽对应的 MCS进行下 发，从而实现了在一些传输带宽发生虚高的场景下，根据传输上限带宽降低最 终下发的 MCS， 从而实现了降低下发的传输带宽， 因此减少 AP和 STA侧设备 的耗电量， 增加续航时间。
需要说明的是， 当 STA的传输上限带宽小于与 STA的协商带宽时，传输带 宽并不一定发生虚高， 例如， 此时 STA的传输上限带宽和与 STA的协商带宽可 能都对应同一 MCS。 但是只要是选择较小的 STA的传输上限带宽对应的 MCS进 行带宽下发， 则一定能够保证在避免带宽虚高的情况出现。
在本发明实施例中，若处理器 702确定 STA的传输上限带宽大于或等于与 STA的协商带宽， 也就是说并不会出现传输带宽虚高的问题， 因此发送器 703 向 STA下发与所述协商带宽对应的 MCS。
本发明实施例相比于现有技术， 不仅仅考虑了 AP与 STA的协商带宽， 还 考虑了 STA的传输上限带宽。 其中 STA的传输上限带宽会对 AP与 STA的实际 传输带宽起到限制作用，具体可以基于 AP上行段的传输带宽和 /或 STA的传输 需求带宽获取， 具体获取方式请参见方法第三实施例的相关之处， 这里不再 赘述。
本发明实施例选择 STA的传输上限带宽所对应的 MCS时， 可以是选择 与该带宽上限最接近的且小于该带宽上限的带宽所对应的 MCS。 此外， MCS还 可以在传输制式所对应的 MCS 中选择。 传输制式可以基于以下参数中的至 少一项参数确定： 下行段的信道频率、 短防护间隔的开启状态、 I /O模式， 具体请参见带宽选择方法第一实施例和第三实施例的相关之处， 这里不再 赘述。
上面从硬件处理的角度对本发明实施例中的 AP的实施例进行描述。 下面 将从模块化功能实体的角度对本发明实施例中的 AP进行描述。
装置实施例四
请参阅图 8， 本发明实施例提供了 AP的第四实施例， 本实施例的 AP具体 包括： 第一获取模块 801、 接收请求模块 802、 第二获取模块 803和下发模块 804。
第一获取模块 801， 用于获取与站点 STA的协商带宽。
本实施例第一获取模块 801在获取与 STA的协商带宽时，具体可以发生在 AP与 STA初次建立通路时， 或者 AP与 STA之间的信道情况发生变化时， 例如 STA发生移动时。 这里， 第一获取模块 801具体可以是根据速率自适应算法获 取与 STA的协商带宽。 速率自适应算法是现有技术中一种用于获取 AP与 STA 的协商带宽的算法，在具体实现时，首先由 AP获取 AP与 STA之间的信道质量， 例如 RSSI、 PSR、 PER等参数， 之后根据获取到的信道质量， 利用任一种速率 自适应算法计算出 AP与 STA的协商带宽。
接收请求模块 802， 用于接收所述 STA的数据传输请求。
当 STA需要连接网络进行数据传输时， 接收请求模块 802会接收到 STA 的数据传输请求。 其中， 该请求可以是由 STA发送的， 比如 STA侧的用户点击 播放视频时， STA会向接收请求模块 802发送数据传输请求； 该请求也可以是 由 AP的上行端发送的， 例如 WAN侧或 LAN侧要向 STA推送数据时， 会向接收 请求模块 802发送 STA的数据传输请求。
第二获取模块 803， 用于接收请求模块 802接收到数据传输请求后， 获取 所述 STA的传输上限带宽。
在本发明实施例中， STA的传输上限带宽指的是 STA与 AP传输数据过程 中能够达到的最大实际带宽。 发明人经研究发现， 在一些应用场景下， STA的 传输上限带宽会对实际的传输带宽产生一定的限制，例如若 STA的传输上限带 宽小于所述与 STA的协商带宽， 则 4艮有可能使得 AP与 STA的实际传输带宽不 能达到基于现有的速率自适应算法所选择的传输带宽，从而导致传输带宽虚高 的问题。 因此在本实施例中， 当接收到 STA的数据传输请求后， 并不会直接根 据 AP与 STA的协商带宽进行带宽下发，而是需要考虑会对 AP与 STA的实际传 输带宽起到限制作用的 STA的传输上限带宽。
下发模块 804， 用于若所述传输上限带宽小于所述协商带宽， 向所述 STA 下发第一 MCS; 其中， 所述第一 MCS小于带宽与 MCS的对应关系中与所述协商 带宽对应的 MCS， 大于等于所述带宽与 MCS的对应关系中与所述传输上限带宽 对应的 MCS。
带宽与 MCS的对应关系反映了 AP与 STA的协商带宽和 AP向 STA下发的 MCS的对应关系。 目前， AP与 STA传输数据时只能基于几种固定的 MCS， 而具 体基于哪一个 MCS由 AP与 STA的协商带宽所决定， 因此， 目前都会预先设置 好带宽与 MCS的对应关系， 通过速率自适应算法等方式获取到 AP与 STA的协 商带宽后， 再从上述对应关系中确定出 AP与 STA的协商带宽所对应的 MCS。 例如， 现有的带宽控制表就是上述对应关系的一种表现形式。 这里， 上述对应 关系具体可以为是在特定的通信标准下的对应关系， 例如具体为 IEEE 802. l la/b/g/n/ac标准下的对应关系。
在带宽控制表等带宽与 MCS的对应关系中选择某一带宽对应的 MCS可以有 多种实施方式， 本发明实施例对比不做限定。 下面仅举例说明一种可选的实施 方式。 某一带宽所对应的 MCS， 具体可以为带宽控制表中， 与该带宽最接近的 且小于该带宽的带宽所对应的 MCS。
在现有技术中，下发模块 804会直接下发 AP与 STA的协商带宽对应的 MCS， 但是由于 STA的传输上限带宽也会对 AP与 STA的实际传输带宽起到限制作用， 比如当带宽与 MCS的对应关系中与 STA的传输上限带宽对应的 MCS小于 AP与 STA的协商带宽对应的 MCS时， 说明此时若下发 AP与 STA的协商带宽对应的 MCS , 会导致传输带宽虚高， 因此， 需要降低下发的 MCS， 即下发的 MCS小于 AP与 STA的协商带宽对应的 MCS。但是为了避免无限制的降低 MCS而导致带宽 过低， 影响传输效率， 因此降低后的 MCS， 必须大于或等于 STA的传输上限带 宽对应的 MCS。 显然基于这种方式所选择的 MCS， 更加合理。
需要说明的是，在满足大于等于传输上限带宽对应的 MCS的前提下， 最终 用于下发的 MCS越小， 则能够更好地解决传输带宽虚高的问题， 因此下发模块 804优选 STA的传输上限带宽对应的 MCS向 STA进行下发。
通过上述技术方案可知， 本实施例在进行带宽选择时， 不仅仅考虑了 AP 与 STA的协商带宽，还考虑了 STA的传输上限带宽， 当 STA的传输上限带宽小 于 AP与 STA协商带宽时，说明如果基于 AP与 STA协商带宽对应的 MCS进行下 发很有可能会导致传输带宽虚高， 因此降低下发的 MCS， 向 STA下发第一 MCS， 第一 MCS小于带宽与 MCS的对应关系中与、 AP与 STA的协商带宽对应的 MCS， 大于等于带宽与 MCS的对应关系中与传输上限带宽对应的 MCS， 从而实现了在 一些传输带宽发生虚高的场景下， 根据 STA 的传输上限带宽降低最终下发的 MCS , 从而实现了降低下发的传输带宽， 因此减少 AP和 STA侧设备的耗电量， 增加续航时间。
而本实施例中在降低下发的传输带宽时，并没有改变现有的速率自适应算 法， 因此简单易行， 没有增加算法复杂度和计算量， 能够保证最终的带宽选择 效果， 而且适用于现有技术中任一种速率自适应算法。
在本发明实施例中，若下发模块 804确定 STA的传输上限带宽大于或等于 AP与 STA的协商带宽， 也就是说并不会出现传输带宽虚高的问题， 直接选择 AP与 STA的协商带宽对应的 MCS向 STA进行下发。
在本发明实施例中， 当下发模块 804执行了 MCS的下发之后，传输模块会 基于下发的第一 MCS与 STA进行数据传输。 而在该数据传输的过程中， AP与 STA的协商带宽对应的 MCS可能会发生更新， 比如当 AP与 STA之间的信道情 况发生变化时（例如 STA发生移动时）， 此时本实施例的 AP还包括该传输模块 和判断模块，判断模块会判断 STA的传输上限带宽对应的 MCS是否小于更新后 的协商带宽，如果是， 更新第一 MCS并通知下发模块 804向 STA下发更新后的 第一 MCS; 更新后的第一 MCS小于更新后的协商带宽对应的 MCS， 且大于等于 STA的传输上限带宽对应的 MCS。
需要说明的是， 在本发明实施例中， STA的传输上限带宽对应的 MCS也有 可能发生更新， 而为了适应该更新， 第二获取模块 803和下发模块 804可以循 环工作。或者也可以每次当 STA的传输上限带宽对应的 MCS发生更新后， 下发 模块 804都重新下发第一 MCS， 从而实现实时地对最终下发的带宽进行调整。 在本发明实施例中，可以是当 AP获取到 AP与 STA的协商带宽和 STA的传 输上限带宽后， 即分别根据协商带宽和传输上限带宽，在带宽与 MCS的对应关 系中确定出对应的 MCS,通过 MCS的比较实现对协商带宽和传输上限带宽的比 较， 下面通过一个实施例说明这种情况。
装置实施例五
请参阅图 9， 本发明实施例提供了 AP的第五实施例， 本实施例的 AP具体 包括： 第一获取模块 901、 接收请求模块 902、 第二获取模块 903、 下发模块 904、 第三获取模块 905和第四获取模块 906。
第一获取模块 901， 用于获取与站点 STA的协商带宽。
本实施例第一获取模块 901在获取与 STA的协商带宽时，具体可以发生在
AP与 STA初次建立通路时， 或者 AP与 STA之间的信道情况发生变化时， 例如 STA发生移动时。 这里， 第一获取模块 901具体可以是根据速率自适应算法获 取与 STA的协商带宽。
第三获取模块 905， 用于根据所述协商带宽， 获取第二 MCS; 第二 MCS为 所述带宽与 MCS的对应关系中与所述协商带宽对应的 MCS。
以表 1 所示的带宽控制表举例说明， 若 AP 与 STA 的协商带宽具体为 40Mbps , 则可以选择与 40Mbps最接近的， 并且小于 40Mbps的带宽， 即 39Mbps 所对应的 MCS4作为 40Mbps对应的第二 MCS。
接收请求模块 902， 用于接收所述 STA的数据传输请求。
第二获取模块 903， 用于所述接收请求模块接收到所述数据传输请求后， 获取所述 STA的传输上限带宽。
第四获取模块 906，用于根据所述传输上限带宽，获取第三 MCS; 第三 MCS 为所述带宽与 MCS的对应关系中与所述传输上限带宽对应的 MCS。
仍以表 1 所示的带宽控制表举例说明， 若 STA 的传输上限带宽具体为 20Mbps，则可以选择与 20Mbps最接近的，并且小于 20Mbps的带宽，即 19. 5Mbps 所对应的 MCS2作为 20Mbps对应的第三 MCS。
下发模块 904， 用于若所述第三 MCS小于所述第二 MCS， 向所述 STA下发 第一 MCS。 第二 MCS是基于 AP与 STA的协商速率所选择的 MCS，第三 MCS是基于 STA 的传输上限带宽所选择的 MCS。 在现有技术中， 直接下发第二 MCS， 但是由于 STA的传输上限带宽也会对 AP与 STA的实际传输带宽起到限制作用， 比如说 当第三 MCS小于第二 MCS， 说明此时若下发第二 MCS会导致传输带宽虚高， 因 此， 需要降低下发的 MCS， 选择小于第二 MCS， 大于等于第三 MCS的第一 MCS 进行下发。
需要说明的是， 在满足大于等于第三 MCS的前提下， 最终用于下发的 MCS 越小， 则能够更好地解决传输带宽虚高的问题， 因此下发模块 904 优选第三 MCS向 STA进行下发。
通过上述技术方案可知， 本实施例在进行带宽选择时， 不仅仅考虑了 AP 与 STA的协商带宽， 还考虑了 STA的传输上限带宽， 分别根据 AP与 STA的协 商带宽和 STA的传输上限带宽在带宽控制表确定出第二 MCS和第三 MCS。 当第 三 MCS小于第二 MCS时，说明如果基于第二 MCS进行下发将会导致传输带宽虚 高， 因此降低下发的 MCS， 向 STA下发小于第二 MCS并且大于等于第三 MCS的 第一 MCS， 从而实现了在一些传输带宽发生虚高的场景下， 根据 STA的传输上 限带宽降低最终下发的 MCS， 从而实现了降低下发的传输带宽， 因此减少 AP 和 STA侧设备的耗电量， 增加续航时间。
通过上述技术方案可知， 本实施例在进行带宽选择时， 不仅仅考虑了 AP 与 STA的协商带宽， 还考虑了 STA的传输上限带宽， 分别根据 AP与 STA的协 商带宽和 STA的传输上限带宽确定出第二 MCS和第三 MCS。 当第三 MCS小于第 二 MCS时，说明如果基于第二 MCS进行下发将会导致传输带宽虚高， 因此降低 下发的 MCS， 向 STA下发小于第二 MCS并且大于等于第三 MCS的第一 MCS， 从 而实现了在一些传输带宽发生虚高的场景下，根据 STA的传输上限带宽降低最 终下发的 MCS， 从而实现了降低下发的传输带宽， 因此减少 AP和 STA侧设备 的耗电量， 增加续航时间。
本实施例在实现带宽选择时， 不仅仅考虑了 AP与 STA的协商带宽， 而 且还考虑了 STA的传输上限带宽，从而解决了传输带宽虚高的问题。具体实现 时是先基于上述两个带宽选择出对应的 MCS， 在对 MCS进行比较确定最终下发 的 MCS。 而实际上， 也可以是先比较上述两个带宽， 根据比较结果确定最终下 发的 MCS。 下面通过一个实施例进行说明。
装置实施例六
请参阅图 10， 本发明实施例提供了 AP的第六实施例， 本实施例的 AP具 体包括： 第一获取模块 1001、 接收请求模块 1002、 第二获取模块 1003、 下发 模块 1004和第四获取模块 1005。
第一获取模块 1001， 用于获取与站点 STA的协商带宽；
本实施例第一获取模块 1001在获取与 STA的协商带宽时， 具体可以发生 在 AP与 STA初次建立通路时， 或者 AP与 STA之间的信道情况发生变化时， 例 如 STA发生移动时。 这里， 第一获取模块 1001具体可以是根据速率自适应算 法获取与 STA的协商带宽。
接收请求模块 1002， 用于接收所述 STA的数据传输请求。
该请求可以是由 STA发送的， 也可以是由 AP的上行端发送的。
第二获取模块 1003，用于接收请求模块 1002接收到所述数据传输请求后， 获取所述 STA的传输上限带宽。
第四获取模块 1005， 用于根据所述传输上限带宽， 获取第三 MCS; 所述第 三 MCS为所述带宽与 MCS的对应关系中与所述传输上限带宽对应的 MCS。
带宽与 MCS的对应关系反映了 AP和 STA之间的协商带宽与 AP向 STA下发 的 MCS的对应关系。 其一种表现形式为现有的带宽控制表。
下发模块 1004， 用于若所述传输上限带宽小于所述协商带宽， 向所述 STA 下发第三 MCS。
与装置第二实施例不同的是，本实施例不再是先根据上述两个带宽选择对 应的 MCS， 再对 MCS进行比较， 而是先比较上述两个带宽， 若比较出 STA的传 输上限带宽小于与 STA的协商带宽，则说明此时有可能会出现传输带宽虚高的 情况， 因此选择上述两个带宽中较小的带宽， 即 STA的传输上限带宽所对应的 MCS向 STA进行下发， 也能够实现避免传输带宽虚高的情况出现。
通过上述技术方案可知，本实施例在进行带宽选择时， 不仅仅考虑了获取 的与 STA的协商带宽，还考虑了 STA的传输上限带宽， 当 STA的传输上限带宽 小于与 STA的协商带宽时，选择较小的 STA的传输上限带宽对应的 MCS进行下 发，从而实现了在一些传输带宽发生虚高的场景下，根据传输上限带宽降低最 终下发的 MCS， 从而实现了降低下发的传输带宽， 因此减少 AP和 STA侧设备 的耗电量， 增加续航时间。
需要说明的是， 当 STA的传输上限带宽小于与 STA的协商带宽时，传输 带宽并不一定发生虚高， 例如， 此时 STA的传输上限带宽和与 STA的协商带宽 可能都对应同一 MCS。 但是只要是选择较小的 STA的传输上限带宽对应的 MCS 进行带宽下发， 则一定能够保证在避免带宽虚高的情况出现。
在本发明实施例中， 若下发模块确定 STA 的传输上限带宽大于或等于与 STA的协商带宽， 也就是说并不会出现传输带宽虚高的问题， 因此向 STA下发 与所述协商带宽对应的 MCS。
本发明实施例相比于现有技术， 不仅仅考虑了 AP与 STA的协商带宽， 还 考虑了 STA的传输上限带宽。 其中 STA的传输上限带宽会对 AP与 STA的实际 传输带宽起到限制作用，具体可以基于 AP上行段的传输带宽和 /或 STA的传输 需求带宽获取， 具体获取方式请参见方法第三实施例的相关之处， 这里不再 赘述。
本发明实施例选择 STA的传输上限带宽所对应的 MCS时， 可以是选择 与该带宽上限最接近的且小于该带宽上限的带宽所对应的 MCS。 此外， MCS还 可以在传输制式所对应的 MCS 中选择。 传输制式可以基于以下参数中的至 少一项参数确定： 下行段的信道频率、 短防护间隔的开启状态、 I /O模式， 具体请参见带宽选择方法第一实施例和第三实施例的相关之处， 这里不再 赘述。
所属领域的技术人员可以清楚地了解到， 为描述的方便和简洁， 上述描述 的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程， 在此不再赘述。
在本申请所提供的几个实施例中， 应该理解到， 所揭露的系统， 装置和方 法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅是示意性 的， 例如， 所述单元的划分， 仅仅为一种逻辑功能划分， 实际实现时可以有另 外的划分方式， 例如多个单元或组件可以结合或者可以集成到另一个系统， 或 一些特征可以忽略， 或不执行。 另一点， 所显示或讨论的相互之间的耦合或直 接輛合或通信连接可以是通过一些接口， 装置或单元的间接輛合或通信连接， 可以是电性， 机械或其它的形式。 单元显示的部件可以是或者也可以不是物理单元， 即可以位于一个地方， 或者 也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部 单元来实现本实施例方案的目的。
另外， 在本发明各个实施例中的各功能单元可以集成在一个处理单元中， 也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元 中。上述集成的单元既可以釆用硬件的形式实现，也可以釆用软件功能单元的 形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售 或使用时， 可以存储在一个计算机可读取存储介质中。基于这样的理解， 本发 明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全 部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储 介质中， 包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器， 或者网络设备等）执行本发明各个实施例所述方法的全部或部分步骤。 而前述 的存储介质包括： U盘、 移动硬盘、 只读存储器（ROM, Read-Only Memory ), 随机存取存储器（RAM, Random Acces s Memory )、 磁碟或者光盘等各种可以存 储程序代码的介质。
以上所述， 以上实施例仅用以说明本发明的技术方案， 而非对其限制； 尽 管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理 解： 其依然可以对前述各实施例所记载的技术方案进行修改， 或者对其中部分 技术特征进行等同替换； 而这些修改或者替换， 并不使相应技术方案的本质脱 离本发明各实施例技术方案的精神和范围。

Claims

权 利 要 求
1、 一种无线保真技术的带宽选择方法， 其特征在于， 接入点 AP获取与站 点 STA的协商带宽； 所述方法包括：
所述 AP接收所述 STA的数据传输请求；
所述 AP获取所述 STA的传输上限带宽；
若所述传输上限带宽小于所述协商带宽， 所述 AP向所述 STA下发第一调 制与编码策略 MCS; 其中， 所述第一 MCS小于带宽与 MCS的对应关系中与所述 协商带宽对应的 MCS， 大于等于所述带宽与 MCS的对应关系中与所述传输上限 带宽对应的 MCS。
2、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 根据所述协商带宽， 获取第二 MCS; 所述第二 MCS为所述带宽与 MCS的对 应关系中与所述协商带宽对应的 MCS；
根据所述传输上限带宽， 获取第三 MCS; 所述第三 MCS为所述带宽与 MCS 的对应关系中与所述传输上限带宽对应的 MCS;
所述若所述传输上限带宽小于所述协商带宽， 所述 AP向所述 STA下发第 一调制与编码策略 MCS， 包括：
若所述第三 MCS小于所述第二 MCS， 所述 AP向所述 STA下发第一 MCS。
3、根据权利要求 2所述的方法， 其特征在于， 所述 AP向所述 STA下发第 — MCS , 包括：
所述 AP向所述 STA下发第三 MCS。
4、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 根据所述传输上限带宽， 获取第三 MCS; 所述第三 MCS为所述带宽与 MCS 的对应关系中与所述传输上限带宽对应的 MCS;
所述 AP向所述 STA下发第一调制与编码策略 MCS， 包括：
所述 AP向所述 STA下发第三 MCS。
5、 根据权利要求 1至 4任一项所述的方法， 其特征在于， 所述 STA的传 输上限带宽基于所述 AP上行段的传输带宽和 /或所述 STA的传输需求带宽获 取。
6、 根据权利要求 5所述的方法， 其特征在于， 所述 STA的传输上限带宽 基于所述 AP上行段的传输带宽和所述 STA的传输需求带宽获取， 包括：
所述 STA的传输上限带宽为所述 AP上行段的传输带宽和所述 STA的传输 需求带宽中数值较小的带宽。
7、根据权利要求 5或 6所述的方法， 其特征在于， 所述 AP上行段的传输 带宽的获取方式包括：
所述 AP获取为所述 AP上行段所分配的资源块大小；
所述 AP基于所述资源块大小获取所述 AP上行段的传输带宽。
8、 根据权利要求 5或 6所述的方法， 其特征在于， 所述 STA的传输需求 带宽的获取方式包括：
所述 AP从所述数据传输请求中获取传输数据的业务类型；
所述 AP基于所述业务类型获取所述 STA的传输需求带宽。
9、 根据权利要求 1至 8任一项所述的方法， 其特征在于， 所述方法还包 括：
所述 AP基于所述第一 MCS与所述 STA传输数据；
若所述协商带宽对应的 MCS在传输数据的过程中发生更新， 所述 AP判断 传输上限带宽对应的 MCS是否小于更新后的协商带宽对应的 MCS， 如果是， 更 新第一 MCS并向所述 STA下发更新后的第一 MCS; 所述更新后的第一 MCS小于 所述更新后的协商带宽对应的 MCS，且大于等于所述传输上限带宽对应的 MCS。
10、 一种接入点 AP， 其特征在于， 包括： 发送器、 接收器和处理器； 所 述发送器与所述处理器连接， 所述接收器与所述处理器连接；
所述接收器用于， 接收站点 STA的数据传输请求；
所述处理器用于， 获取所述 STA的协商带宽， 以及在所述接收器接收到所 述数据传输请求后， 获取所述 STA的传输上限带宽；
所述发送器用于， 若所述处理器确定所述传输上限带宽小于所述协商带 宽， 向所述 STA下发第一调制与编码策略 MCS; 其中， 所述第一 MCS小于带宽 与 MCS的对应关系中与所述协商带宽对应的 MCS， 大于等于所述带宽与 MCS的 对应关系中与所述传输上限带宽对应的 MCS。
11、 根据权利要求 10所述的 AP， 其特征在于，
所述处理器还用于， 根据所述协商带宽获取第二 MCS， 以及根据所述传输 上限带宽获取第三 MCS; 所述第二 MCS为所述带宽与 MCS的对应关系中与所述 协商带宽对应的 MCS; 所述第三 MCS为所述带宽与 MCS的对应关系中与所述传 输上限带宽对应的 MCS;
所述发送器用于若所述处理器确定所述传输上限带宽小于所述协商带宽， 向所述 STA下发第一调制与编码策略 MCS， 包括：
所述发送器用于若所述处理器确定所述第三 MCS小于所述第二 MCS， 向所 述 STA下发第一 MCS。
12、根据权利要求 11所述的 AP，其特征在于，所述发送器用于向所述 STA 下发第一 MCS， 包括：
所述发送器用于向所述 STA下发第三 MCS。
13、 根据权利要求 10所述的 AP， 其特征在于， 所述处理器还用于， 根据 所述传输上限带宽获取第三 MCS; 所述第三 MCS为所述带宽与 MCS的对应关系 中与所述传输上限带宽对应的 MCS;
所述发送器用于向所述 STA下发第一调制与编码策略 MCS， 包括： 所述发送器用于向所述 STA下发第三 MCS。
14、 根据权利要求 10至 13任一项所述的 AP， 其特征在于， 所述 STA的 传输上限带宽基于所述 AP上行段的传输带宽和 /或所述 STA的传输需求带宽获 取。
15、 根据权利要求 14所述的 AP， 其特征在于， 所述 STA的传输上限带宽 基于所述 AP上行段的传输带宽和所述 STA的传输需求带宽获取， 包括：
所述 STA的传输上限带宽为所述 AP上行段的传输带宽和所述 STA的传输 需求带宽中数值较小的带宽。
16、 根据权利要求 14或 15所述的 AP， 其特征在于， 所述 AP上行段的传 输带宽的获取方式包括：
所述处理器获取为所述 AP上行段所分配的资源块大小；
所述处理器基于所述资源块大小获取所述 AP上行段的传输带宽。
17、 根据权利要求 14或 15所述的 AP， 其特征在于， 所述 STA的传输需 求带宽的获取方式包括：
所述处理器从所述数据传输请求中获取传输数据的业务类型；
所述处理器基于所述业务类型获取所述 STA的传输需求带宽。
18、 根据权利要求 10至 17任一项所述的 AP， 其特征在于，
所述接收器和所述发送器还用于，基于所述第一 MCS与所述 STA传输数据； 所述处理器还用于，若所述协商带宽对应的 MCS在传输数据的过程中发生 更新， 判断传输上限带宽对应的 MCS是否小于更新后的协商带宽对应的 MCS， 如果是， 更新第一 MCS并通知所述发送器向所述 STA下发更新后的第一 MCS; 所述更新后的第一 MCS小于所述更新后的协商带宽对应的 MCS， 且大于等于所 述传输上限带宽对应的 MCS。
19、 一种接入点 AP， 其特征在于， 包括：
第一获取模块， 用于获取与站点 STA的协商带宽；
接收请求模块， 用于接收所述 STA的数据传输请求；
第二获取模块， 用于所述接收请求模块接收到所述数据传输请求后， 获取 所述 STA的传输上限带宽；
下发模块， 用于若所述传输上限带宽小于所述协商带宽， 向所述 STA下发 第一调制与编码策略 MCS; 其中， 所述第一 MCS小于带宽与 MCS的对应关系中 与所述协商带宽对应的 MCS， 大于等于所述带宽与 MCS的对应关系中与所述传 输上限带宽对应的 MCS。
20、 根据权利要求 19所述的 AP， 其特征在于， 还包括：
第三获取模块， 用于根据所述协商带宽， 获取第二 MCS; 所述第二 MCS为 所述带宽与 MCS的对应关系中与所述协商带宽对应的 MCS;
第四获取模块，用于根据所述传输上限带宽，获取第三 MCS;所述第三 MCS 为所述带宽与 MCS的对应关系中与所述传输上限带宽对应的 MCS;
所述下发模块用于若所述传输上限带宽小于所述协商带宽， 向所述 STA 下发第一调制与编码策略 MCS， 包括：
所述下发模块用于若所述第三 MCS小于所述第二 MCS， 向所述 STA下发第 一 MCS。
21、 根据权利要求 20所述的 AP， 其特征在于， 所述下发模块用于向所述 STA下发第一 MCS， 包括：
所述下发模块用于向所述 STA下发第三 MCS。
22、 根据权利要求 19所述的 AP， 其特征在于， 还包括：
第四获取模块，用于根据所述传输上限带宽，获取第三 MCS;所述第三 MCS 为所述带宽与 MCS的对应关系中与所述传输上限带宽对应的 MCS;
所述下发模块用于向所述 STA下发第一调制与编码策略 MCS， 包括： 所述下发模块用于向所述 STA下发第三 MCS。
23、 根据权利要求 19至 11任一项所述的 AP， 其特征在于， 所述 STA的 传输上限带宽基于所述 AP上行段的传输带宽和 /或所述 STA的传输需求带宽获 取。
24、 根据权利要求 23所述的 AP， 其特征在于， 所述 STA的传输上限带宽 基于所述 AP上行段的传输带宽和所述 STA的传输需求带宽获取， 包括：
所述 STA的传输上限带宽为所述 AP上行段的传输带宽和所述 STA的传输 需求带宽中数值较小的带宽。
25、 根据权利要求 23或 24所述的 AP， 其特征在于， 所述 AP上行段的传 输带宽的获取方式包括：
所述第二获取模块获取为所述 AP上行段所分配的资源块大小；
所述第二获取模块基于所述资源块大小获取所述 AP上行段的传输带宽。
26、 根据权利要求 23或 24所述的 AP， 其特征在于， 所述 STA的传输需 求带宽的获取方式包括：
所述第二获取模块从所述数据传输请求中获取传输数据的业务类型； 所述第二获取模块基于所述业务类型获取所述 STA的传输需求带宽。
27、 根据权利要求 19至 26任一项所述的 AP， 其特征在于， 所述 AP还包 括：
传输模块， 用于基于所述第一 MCS与所述 STA传输数据；
判断模块， 用于若所述协商带宽对应的 MCS 在传输数据的过程中发生更 新， 判断传输上限带宽对应的 MCS是否小于更新后的协商带宽对应的 MCS， 如 果是， 更新第一 MCS并通知所述下发模块向所述 STA下发更新后的第一 MCS; 所述更新后的第一 MCS小于所述更新后的协商带宽对应的 MCS， 且大于等于所 述传输上限带宽对应的 MCS。
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