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WO2016070350A1 - Procédé et appareil pour évaluer la disponibilité de canal de station - Google Patents

Procédé et appareil pour évaluer la disponibilité de canal de station Download PDF

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Publication number
WO2016070350A1
WO2016070350A1 PCT/CN2014/090317 CN2014090317W WO2016070350A1 WO 2016070350 A1 WO2016070350 A1 WO 2016070350A1 CN 2014090317 W CN2014090317 W CN 2014090317W WO 2016070350 A1 WO2016070350 A1 WO 2016070350A1
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Prior art keywords
bandwidth mode
candidate bandwidth
channel
candidate
determining
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English (en)
Chinese (zh)
Inventor
李彦淳
林梅露
蓝洲
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2014/090317 priority Critical patent/WO2016070350A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

Definitions

  • Embodiments of the present invention relate to the field of wireless communication technologies, and, more particularly, to a method and apparatus for channel availability assessment of a station.
  • Wireless Local Area Network (English: Wireless Local Area Network, WLAN for short) has become one of the mainstream mobile broadband access technologies due to its high speed and low cost.
  • WLAN technology is evolving from traditional 20MHz single channel transmission to 40MHz, 80MHz, 160MHz or even wider multi-channel transmission.
  • STA Station, abbreviation: STA
  • the 802.11 protocol of the Institute of Electrical and Electronics Engineers adopts Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA).
  • CSMA/CA Carrier Sense Multiple Access with Collision Avoidance
  • the mechanism performs channel backoff and competition.
  • the CSMA/CA mechanism requires access points and stations to listen to the channel before sending a signal to prevent collisions.
  • the methods for the access point and the station to listen to the channel are physical carrier sensing and virtual carrier sensing. The signal can only be sent when both the physical carrier sense and the virtual carrier sense result indicate that the channel is idle.
  • Physical carrier sensing mainly uses the Clear Channel Assessment (CCA) method to determine the state of the channel.
  • CCA Clear Channel Assessment
  • WLAN mainly works in the industrial, scientific and medical frequency bands (English: Industrial Scientific Medical Band, ISM for short).
  • the ISM is an unlicensed band.
  • the station needs to judge before transmitting data on the channel: if the received effective orthogonal frequency is complex If the power of the data transmitted by (English: Orthogonal Frequency Division Multiplexing, OFDM for short) is greater than or equal to the CCA threshold, the evaluation result of the CCA method is that the state of the channel is busy; otherwise, the state of the channel is considered to be idle.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the CCA threshold only changes with the bandwidth of the station where the data transmission has been established, that is, the established data transmission is preferentially protected. In this way, it is easy to cause excessive protection for the established data transmission, thereby reducing the transmission opportunities of the stations that need to initiate new data transmission, and ultimately resulting in low system throughput.
  • Embodiments of the present invention provide a method and apparatus for channel availability assessment of a station, which can increase system throughput.
  • a method for channel availability assessment of a station including: determining at least one first bandwidth mode supported by a station that needs to perform data transmission, and at least one second supported by a peer device of the data transmission a bandwidth mode; determining at least one candidate bandwidth mode for the data transmission according to the at least one first bandwidth mode and the at least one second bandwidth mode; determining availability determination parameters and the availability of the first candidate bandwidth mode Determining a threshold corresponding to the parameter, the first candidate bandwidth mode is any one of at least one candidate bandwidth mode; determining availability of the first candidate bandwidth mode according to the availability determination parameter and a threshold corresponding to the availability determination parameter; The first candidate bandwidth mode determines the bandwidth mode used by the station and the peer device for data transmission.
  • determining, by the availability determination parameter of the first candidate bandwidth mode, the threshold corresponding to the availability determination parameter includes: performing, for each channel of the first candidate bandwidth mode Listening, obtaining interference power of each channel of the first candidate bandwidth mode; determining a maximum allowed interference power of each channel of the first candidate bandwidth mode; wherein the availability determination parameter is the first candidate bandwidth mode
  • the interference power of each channel, the threshold corresponding to the availability determination parameter is the maximum allowed interference power of each channel of the first candidate bandwidth mode.
  • determining, according to the availability determination parameter and the threshold corresponding to the availability determination parameter, determining the availability of the first candidate bandwidth mode includes: Determining that the first candidate bandwidth mode is available when the interference power of each channel of the candidate bandwidth mode is smaller than the maximum allowed interference power of each channel of the first candidate bandwidth mode; when the first candidate bandwidth mode is available When the interference power of any of the channels is greater than or equal to the maximum allowed interference power of any of the channels, it is determined that the first candidate bandwidth mode is unavailable.
  • determining a maximum allowed interference power of each channel of the first candidate bandwidth mode includes: transmitting data according to a transmit power of the data transmission The transmitted transmit power is evenly distributed to each channel of the first candidate bandwidth mode, and the transmit power of each channel of the first candidate bandwidth mode is obtained; the transmit power of each channel according to the first candidate bandwidth mode. Determining a power backoff value of each channel of the first candidate bandwidth mode; determining the first to wait according to a power backoff value of each channel of the first candidate bandwidth mode The maximum allowed interference power for each channel of the bandwidth mode is selected.
  • determining a maximum allowed interference power of each channel of the first candidate bandwidth mode includes: acquiring the first candidate bandwidth mode a minimum required power of each channel; determining a power backoff value of each channel of the first candidate bandwidth mode according to a minimum required power of each channel of the first candidate bandwidth mode; according to the first candidate bandwidth The power backoff value of each channel of the mode determines the maximum allowed interference power of each channel of the first candidate bandwidth mode.
  • determining, by the availability determining parameter of the first candidate bandwidth mode, the threshold corresponding to the availability determining parameter includes: the first candidate bandwidth mode Each channel is intercepted to obtain interference power of each channel of the first candidate bandwidth mode; and each channel of the first candidate bandwidth mode is determined according to interference power of each channel of the first candidate bandwidth mode. Maximum allowable transmit power; determining the transmit power of the data transmitted by the station, the interference power of each channel of the first candidate bandwidth mode, and the maximum allowed transmit power of each channel of the first candidate bandwidth mode.
  • a transmission capacity of the first candidate bandwidth mode wherein the availability determination parameter is a transmission capacity of the first candidate bandwidth mode, and the threshold corresponding to the availability determination parameter is preset by the station and the first candidate bandwidth mode Corresponding minimum required transmission capacity.
  • determining, according to the availability determination parameter and the threshold corresponding to the availability determination parameter, determining the availability of the first candidate bandwidth mode includes: When the transmission capacity of the first candidate bandwidth mode is greater than the minimum required transmission capacity corresponding to the first candidate bandwidth mode, determining that the first candidate bandwidth mode is available; when the transmission capacity of the first candidate bandwidth mode is less than or equal to When the minimum required transmission capacity corresponding to the first candidate bandwidth mode is determined, it is determined that the first candidate bandwidth mode is unavailable.
  • determining, by the availability determination parameter of the first candidate bandwidth mode, the threshold corresponding to the availability determination parameter includes: according to the first candidate bandwidth The modulation and coding mechanism of the mode transmission data determines a packet error rate of the first candidate bandwidth mode, wherein the availability determination parameter is a packet error rate of the first candidate bandwidth mode, and the threshold corresponding to the availability determination parameter is the site The preset maximum allowed packet error rate corresponding to the first candidate bandwidth mode.
  • determining the first candidate bandwidth according to the availability determination parameter and a threshold corresponding to the availability determination parameter The availability of the mode includes: determining that the first candidate bandwidth mode is available when the packet error rate of the first candidate bandwidth mode is less than a maximum allowed packet error rate corresponding to the first candidate bandwidth mode; When the error rate of the candidate bandwidth mode is greater than or equal to the maximum allowed packet error rate corresponding to the first candidate bandwidth mode, it is determined that the first candidate bandwidth mode is unavailable.
  • determining, by the first candidate bandwidth mode that is available, the bandwidth mode used by the station and the peer device for data transmission includes: according to the first Interference power of each channel of a candidate bandwidth mode and transmission power of the data transmitted by the station, or interference power of each channel according to the first candidate bandwidth mode, transmission power and antenna of the station transmitting the data
  • the transmission direction of the system determines a performance index of the at least one first candidate bandwidth mode that is available; determining, according to the performance index, a bandwidth mode used by the station and the peer device to perform the data transmission; wherein the performance index includes the following parameters At least one of: transmission bandwidth, transmission capacity, transmission energy consumption, and packet error rate.
  • the at least one candidate bandwidth mode is an intersection of the at least one first bandwidth mode and the at least one second bandwidth mode.
  • a second aspect provides an apparatus for channel availability evaluation of a station, including: a first determining unit, configured to determine at least one first bandwidth mode supported by a station that needs to perform data transmission, and a peer device of the data transmission Supporting at least one second bandwidth mode; the second determining unit, configured to determine at least one for the data transmission according to the at least one first bandwidth mode and the at least one second bandwidth mode determined by the first determining unit a candidate bandwidth mode; a third determining unit, configured to determine a threshold of a first candidate bandwidth mode and a threshold corresponding to the availability determining parameter, where the first candidate bandwidth mode is in the at least one candidate bandwidth mode Any one of the fourth determining unit, configured to determine, according to the availability determination parameter determined by the third determining unit and the threshold corresponding to the availability determining parameter, the availability of the first candidate bandwidth mode; and the fifth determining unit, configured to: Determining the number of the site and the peer device to perform the number according to the available first candidate bandwidth mode determined by the fourth determining unit Transmission bandwidth mode employed.
  • the third determining unit is configured to perform, by using, listening to each channel of the first to-be-selected bandwidth mode, to obtain each of the first candidate bandwidth modes.
  • the interference power of each channel and determining the maximum allowed interference power of each channel in the first candidate bandwidth mode; wherein the availability determination parameter is the interference power of each channel of the first candidate bandwidth mode, the availability Determining a threshold corresponding to the parameter for each channel of the first candidate bandwidth mode Maximum allowable interference power.
  • the fourth determining unit is specifically configured to: when the interference power of each channel of the first candidate bandwidth mode is smaller than the first to be used Determining that the first candidate bandwidth mode is available when the maximum allowed interference power of each channel of the bandwidth mode is selected; or, if the interference power of any channel of the first candidate bandwidth mode is greater than or equal to any of When the maximum allowed interference power of the channel is determined, it is determined that the first candidate bandwidth mode is unavailable.
  • the third determining unit is specifically configured to allocate, according to the transmit power of the data transmission, the transmit power of the data transmission to the first Determining the transmit power of each channel of the first candidate bandwidth mode for each channel of the candidate bandwidth mode, and determining the first candidate bandwidth mode according to the transmit power of each channel of the first candidate bandwidth mode. a power backoff value of each channel, and determining a maximum allowed interference power of each channel of the first candidate bandwidth mode according to a power backoff value of each channel of the first candidate bandwidth mode.
  • the third determining unit is specifically configured to obtain a minimum required power of each channel of the first candidate bandwidth mode, according to the first a minimum required power of each channel of the candidate bandwidth mode, determining a power backoff value of each channel of the first candidate bandwidth mode, and performing power backoff according to each channel of the first candidate bandwidth mode a value that determines a maximum allowed interference power for each channel of the first candidate bandwidth mode.
  • the third determining unit is specifically configured to: listen to each channel of the first candidate bandwidth mode, and determine the first to be determined Selecting the interference power of each channel of the bandwidth mode, determining the maximum allowed transmit power of each channel of the first candidate bandwidth mode according to the interference power of each channel of the first candidate bandwidth mode, and transmitting according to the station Determining the transmission capacity of the first candidate bandwidth mode by the transmit power of the data, the interference power of each channel of the first candidate bandwidth mode, and the maximum allowed transmit power of each channel of the first candidate bandwidth mode
  • the availability determination parameter is the transmission capacity of the first candidate bandwidth mode
  • the threshold corresponding to the availability determination parameter is a minimum required transmission capacity corresponding to the first candidate bandwidth mode preset by the station.
  • the fourth determining unit is specifically configured to: when the transmission capacity of the first candidate bandwidth mode is greater than the first candidate bandwidth mode Determining that the first candidate bandwidth mode is available when the minimum required transmission capacity is available; or When the transmission capacity of the first candidate bandwidth mode is less than or equal to the minimum required transmission capacity corresponding to the first candidate bandwidth mode, determining that the first candidate bandwidth mode is unavailable.
  • the third determining unit is specifically configured to determine, according to the modulation and coding mechanism for transmitting data in the first candidate bandwidth mode, the first candidate bandwidth.
  • the error rate of the mode wherein the availability determination parameter is a packet error rate of the first candidate bandwidth mode, and the threshold corresponding to the availability determination parameter is a maximum allowed by the site corresponding to the first candidate bandwidth mode.
  • the rate of error packets is specifically configured to determine, according to the modulation and coding mechanism for transmitting data in the first candidate bandwidth mode, the first candidate bandwidth.
  • the fourth determining unit is specifically configured to: when the packet loss ratio of the first candidate bandwidth mode is smaller than the first to wait When the maximum allowed packet error rate corresponding to the bandwidth mode is selected, determining that the first candidate bandwidth mode is available; or, when the packet error rate of the first candidate bandwidth mode is greater than or equal to the first candidate bandwidth mode, When the maximum allowed packet error rate is determined, it is determined that the first candidate bandwidth mode is unavailable.
  • the fifth determining unit is specifically configured to: use, according to the interference power of each channel of the first candidate bandwidth mode, and transmit the data by the station. Transmit power, or, according to the interference power of each channel of the first candidate bandwidth mode, the transmit power of the data transmitted by the station, and the transmit direction of the antenna system, determine at least one of the first candidate bandwidth modes that are available.
  • a performance index and determining, according to the performance index, a bandwidth mode used by the station and the peer device for the data transmission; wherein the performance index includes at least one of the following parameters: transmission bandwidth, transmission capacity, transmission energy consumption, and Packet error rate.
  • the at least one candidate bandwidth mode is an intersection of the at least one first bandwidth mode and the at least one second bandwidth mode.
  • the threshold when the channel is evaluated for the channel, the threshold is determined by using the threshold corresponding to the bandwidth mode of the site, instead of relying solely on the bandwidth mode of the station that has established the data transmission, so that the established mode can be avoided as much as possible.
  • Over-protection of the bandwidth of data transmission sites that need to transmit data can make reasonable use of bandwidth resources and increase the throughput of the system.
  • FIG. 1 is a schematic diagram of a typical WLAN deployment scenario in which an embodiment of the present invention is applicable.
  • FIG. 2 is a schematic flow chart of a method for channel availability evaluation of a station according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for channel availability evaluation of a station according to another embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of a method for channel availability evaluation of a station according to still another embodiment of the present invention.
  • Figure 5 is a schematic block diagram of a site for channel availability assessment in accordance with one embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a site for channel availability assessment in accordance with another embodiment of the present invention.
  • the station can be a wireless communication chip, a wireless sensor or a wireless communication terminal.
  • a mobile phone that supports Wireless Fidelity (English: Wireless Fidelity, WiFi for short) communication
  • a tablet that supports WiFi communication
  • a set-top box that supports WiFi communication
  • a computer that supports WiFi communication.
  • the site can support the 802.11ax system.
  • the site supports multiple WLAN formats such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • Access Point also known as wireless access point or hotspot.
  • An AP is a special site that provides access to the site. It can be an access point for mobile users to enter the wired network. It is mainly deployed in the home, inside the building, and inside the campus. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors.
  • An AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect the wireless network clients together and then connect the wireless network to the Ethernet.
  • the main standard adopted by AP is the Institute of Electrical and Electronics Engineers (English: 802.11 series).
  • the AP may be a terminal device or a network device with a WiFi chip.
  • the AP may be a device supporting the 802.11ax system.
  • the AP may be a wireless local area network supporting 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a. , referred to as: WLAN) standard equipment.
  • the embodiment of the present invention can be applied to a wireless local area network, and the wireless local area network can be a basic service set (English: Basic Service Set, BSS for short). It should be understood that, under the basic network structure of the WiFi system, a plurality of basic service sets may be included in the network, and each basic service set may include one AP and multiple STAs associated with the AP.
  • the site is taken as an example for illustrative purposes only, and the present invention is not limited thereto.
  • FIG. 1 is a schematic diagram of a typical WLAN deployment scenario in which an embodiment of the present invention is applicable.
  • Figure 1 includes two sites: Site 1 and Site 2, and Site 1 and Site 2 communicate.
  • station 1 can send a message to station 2, so that station 2 obtains the transmission data length of station 1, and likewise, station 2 can send a message to station 1, so that station 1 obtains the transmission data length of station 2, where the station is It may be the above-mentioned STA, or may be the above-mentioned AP.
  • the number of sites can be multiple.
  • FIG. 2 is a schematic flowchart of a method for channel availability evaluation of a station according to an embodiment of the present invention. The method of Figure 2 is performed by a site.
  • the threshold when the channel is evaluated for the channel, the threshold is determined by using the threshold corresponding to the bandwidth mode of the site, instead of relying solely on the bandwidth mode of the station that has established the data transmission, so that the established mode can be avoided as much as possible.
  • Over-protection of the bandwidth of data transmission sites that need to transmit data can make reasonable use of bandwidth resources and increase the throughput of the system.
  • the bandwidth mode refers to a channel set or a frequency band selected by the station for data transmission. set.
  • the set of channels used by each bandwidth mode can be uniquely determined by the channel bandwidth. For example, when the bandwidth mode is 20MHz, it means that the station uses the primary 20MHz channel for data transmission; when the bandwidth mode is 40MHz, it means that the station uses the primary 20MHz+secondary20MHz channel for a total of 40MHz for data transmission; when the bandwidth mode is 80MHz, it means that the site uses primary.
  • 20MHz+secondary20MHz+secondary 40MHz A total of 80MHz channel for data transmission; when the bandwidth mode is 160MHz, it means that the station uses primary 20MHz+secondary20MHz+secondary 40MHz+secondary 80MHz total 160MHz channel for data transmission.
  • the present invention is not limited to the above system, and can also be applied to the case where the general partial bandwidth mode does not include the primary channel.
  • the physical layer CCA module detects that the data being transmitted uses a channel containing primary 20MHz, all bandwidth modes must not be used (in the first column of the table below); if the physical layer CCA mode The group detects that the data being transmitted does not use a channel containing primary 20MHz, and uses a channel containing a secondary 20MHz, and can only use the primary 20MHz bandwidth mode for data transmission (in the second column of the table below); The CCA module detects that the data being transmitted does not use the channel containing the primary 20MHz and secondary, and uses the channel containing the secondary 40MHz, and can use the primary 20MHz, primary 40MHz bandwidth mode for data transmission (the third column in the table below) Case); if the physical layer CCA module detects that the data being transmitted does not use a channel containing primary 20MHz, secondary 20MHz and secondary 40MHz, and uses a channel containing a secondary 80MHz, the primary 20MHz, primary 40MHz, primary 80MHz bandwidth mode can be used.
  • the physical layer CCA module detects If the transmitted data does not use a channel containing primary 20MHz, secondary 20MHz, secondary 40MHz and secondary 80MHz, data transmission can be performed using the primary 20MHz, primary 40MHz, primary 80MHz, primary160MHz or 80+80MHz bandwidth mode (fifth table below) The case of the column).
  • the 80+80MHz bandwidth mode signal can be sent by two RF modules in different frequency bands, thus reducing the support bandwidth required for a single RF module.
  • One of the 80MHz uses primary 80MHz and the other 80MHz uses secondary 80MHz. Influenced by the licensed frequency band, the two 80 MHz channels may be non-adjacent.
  • the at least one candidate bandwidth mode may include all bandwidth modes supported by the station.
  • the at least one candidate bandwidth mode may be an intersection of at least one first bandwidth mode and at least one second bandwidth mode, or may be at least one first bandwidth. A true subset of the intersection of the pattern and the at least one second bandwidth pattern.
  • the embodiment of the present invention does not limit the form of the threshold for the availability judgment and the threshold of the availability judgment parameter.
  • the availability determination parameter may be interference power, and the threshold corresponding to the availability determination parameter may be the maximum allowed interference power; or the availability determination parameter may be the transmission capacity, and the threshold corresponding to the availability determination parameter may be the minimum required transmission capacity; or, the availability judgment
  • the parameter may be a packet error rate, and the threshold corresponding to the availability judgment parameter may be a maximum allowed packet error rate.
  • Those skilled in the art can design other forms of usability judgment parameters and corresponding thresholds as needed. Such designs fall within the scope of the embodiments of the present invention, and only the designed usability judgment parameters and corresponding thresholds depend on the data to be required. The bandwidth mode of the transmitted site is sufficient.
  • the availability determination parameter may be the interference power of each channel of the first candidate bandwidth mode
  • the threshold corresponding to the availability determination parameter may be each of the first candidate bandwidth modes.
  • the maximum allowable interference power of the channels when the availability determination parameter of the first candidate bandwidth mode and the threshold corresponding to the availability determination parameter are determined in step 230, each channel of the first candidate bandwidth mode may be intercepted, and the first The interference power of each channel of a candidate bandwidth mode is used as the above-mentioned availability determination parameter; in addition, the maximum allowable interference power of each channel of the first candidate bandwidth mode may be determined as the threshold.
  • the site may be intercepted to obtain interference information on each channel of the first candidate bandwidth mode.
  • the interference information may include interference power, interference direction, and the like. Then, the station can use the interference power in the interference information as the availability judgment parameter of the first candidate bandwidth mode.
  • the site The transmit power of the data transmission may be first determined, and the transmit power is evenly distributed to each channel of the first candidate bandwidth mode to obtain the transmit power of each channel of the first candidate bandwidth mode. Then, the station may determine a power backoff value of each channel of the first candidate bandwidth mode according to the transmit power of each channel of the first candidate bandwidth mode. In this way, the station can determine the maximum allowed interference power of each channel of the first candidate bandwidth mode according to the power backoff value of each channel of the first candidate bandwidth mode.
  • the power size on each channel of the first candidate bandwidth mode is P_TX ⁇ ChannelSet_c ⁇ [i].
  • the power backoff value on the channel i when the first candidate bandwidth mode is used can be obtained:
  • P_max is the maximum transmit power when data transmission is performed using the bandwidth mode of 20 MHz, that is, the power corresponding to the I_CS_premit interference level.
  • the station when determining a threshold corresponding to the interference power of each channel of the first candidate bandwidth mode (ie, the maximum allowed interference power of each channel in the first candidate bandwidth mode)
  • the station may first obtain a minimum required power of each channel of the first candidate bandwidth mode, and then determine each of the first candidate bandwidth modes according to a minimum required power of each channel of the first candidate bandwidth mode. The power backoff value of the channel, and finally determining the maximum allowed interference power of each channel of the first candidate bandwidth mode according to the power backoff value of each channel of the first candidate bandwidth mode.
  • the link adaptation module may preset a minimum required power P_min_req ⁇ ChannelSet_c ⁇ [i] of each channel in the first bandwidth mode, for example, P_min_req ⁇ 1, 2 ⁇ [1] is using channel 1, 2 The minimum required power on channel 1 for data transmission.
  • i ⁇ ChannelSet_c,i is one channel included in the first candidate bandwidth mode
  • ChannelSet_c is the first candidate bandwidth mode
  • ChannelSet_c ⁇ ChannelSet_List, ChannelSet_List represents a set of at least one candidate bandwidth mode.
  • a power backoff value of each channel of the first candidate bandwidth mode may be obtained:
  • P_max is the maximum transmit power when data transmission is performed using the bandwidth mode of 20 MHz, that is, the power corresponding to the I_CS_premit interference level.
  • the maximum allowed interference power of each channel of the first candidate bandwidth mode may be obtained:
  • I_CS_premit ⁇ ChannelSet_c ⁇ [i] I_CS_premit/P_backoff ⁇ ChannelSet_c ⁇ [i].
  • I_CS_premit is the maximum allowable interference power on channel i without considering power backoff.
  • the availability determination parameter is the interference power of each channel of the first candidate bandwidth mode
  • the threshold corresponding to the availability determination parameter is the maximum allowed interference power
  • the channel when the interference power of each channel of the first candidate bandwidth mode is smaller than the maximum allowed interference power of each channel of the first candidate bandwidth mode, the channel may be marked as idle; when the first candidate bandwidth is selected
  • the first candidate bandwidth mode is determined to be available when the interference power of each channel of the mode is less than the maximum allowed interference power of each channel of the first candidate bandwidth mode.
  • the interference power of any channel i of the first candidate bandwidth mode is greater than or equal to the maximum allowed interference power of any channel i of the first candidate bandwidth mode, the channel i may be marked as busy, and the first is determined.
  • the candidate bandwidth mode is not available.
  • the station After traversing all the candidate bandwidth modes supported by the site in the above manner, if at least one bandwidth mode is available, channel sensing is performed on the available bandwidth mode, and the first candidate to be selected including the primary channel is detected.
  • the bandwidth mode is transmitting data
  • the station performs backoff and reduces the backoff count value.
  • the backoff count value is reduced to 0, the backoff is completed, the station selects the optimal bandwidth mode for data transmission; if the backoff is not completed, the listener continues to listen for the next unit listening period, and then judges whether to evacuate according to the interception result. carry out.
  • the availability determination parameter may be a transmission capacity of the first candidate bandwidth mode
  • the threshold of the availability determination parameter may be preset by the station and the first candidate bandwidth mode. Corresponding minimum required capacity.
  • the transmission capacity of the first candidate bandwidth mode may be determined as the availability determination parameter;
  • the minimum required transmission capacity when data transmission using the first candidate bandwidth mode is used may be set in advance as the above threshold.
  • the station when determining a transmission capacity of any candidate bandwidth mode (for example, the foregoing first candidate bandwidth mode), the station may listen to each channel of the first candidate bandwidth mode. Obtaining interference power on each channel of the first candidate bandwidth mode, and then determining, by the station, the maximum of each channel of the first candidate bandwidth mode according to the interference power of each channel of the first candidate bandwidth mode Allowable transmit power, the last station may be based on the maximum allowed transmit power of each channel of the first candidate bandwidth mode, the interference power of each channel of the first candidate bandwidth mode detected by the station, and the station transmission data. The transmit power is predicted to predict the transmission capacity of the first candidate bandwidth mode.
  • the station listens to each channel of the first candidate bandwidth mode, and obtains interference information on each channel of the first candidate bandwidth mode.
  • the interference information may include interference power and interference Wait.
  • the power backoff value of each channel can be obtained according to the interference power I_CS ⁇ ChannelSet_c ⁇ [i] of each channel of the first candidate bandwidth mode:
  • I_CS_allowed ⁇ ChannelSet_c ⁇ [i] is the maximum allowed listening interference power on channel i.
  • the maximum allowed transmit power of each channel of the first candidate bandwidth mode may be obtained:
  • P_TX is the maximum allowed transmit power on channel i without considering the power backoff value.
  • the station allocates the transmit power for data transmission to multiple channels according to the maximum allowed transmit power on the channel i of the first candidate bandwidth mode and the interference power on the channel i of the first candidate bandwidth mode, and the network can predict the The transmission capacity R ⁇ ChannelSet_c ⁇ of the first candidate bandwidth mode.
  • the transmission capacity R can be obtained by a capacity estimation method such as RBIR/MMIB/EESM.
  • the minimum required transmission capacity R_premit ⁇ ChannelSet_c ⁇ of any candidate bandwidth mode may be preset by the station according to different bandwidth modes.
  • step 240 when the transmission capacity of the first candidate bandwidth mode is greater than the minimum required capacity corresponding to the first candidate bandwidth mode, that is, the first candidate bandwidth mode satisfies R ⁇ ChannelSet_c ⁇ >R_premit ⁇ ChannelSet_c ⁇ , determining that the first candidate bandwidth mode is available; when the transmission capacity of the first candidate bandwidth mode is less than or equal to the minimum required capacity, that is, the first candidate bandwidth mode satisfies R ⁇ ChannelSet_c When ⁇ R_premit ⁇ ChannelSet_c ⁇ , it is determined that the first candidate bandwidth mode is unavailable.
  • the minimum required transmission capacity of the first candidate bandwidth mode may be the minimum required for the station to use the first candidate bandwidth mode for data transmission. Capacity; if the station is used to receive data, then the minimum required transmission capacity may be the minimum capacity required for the station to receive data in the first candidate bandwidth mode and then respond to the data sent by the sender, ie, the receiver replies with a confirmation. Received the packet sent by the sender The minimum capacity required.
  • the backoff module After traversing all the bandwidth modes supported by the site in the above manner, if at least one bandwidth mode is available, the backoff module will reduce the backoff count value according to the idle state of the channel until the backoff is completed.
  • the speed of backoff ie the amount of backoff count reduction, can be adjusted by the number of available bandwidth modes or the predicted capacity.
  • the initial backoff count value can be randomly selected by the station from 0 to the size of the congestion window. By selecting the initial backoff count value and backing off, it can be avoided that multiple sites simultaneously detect the simultaneous access and collision of the channel immediately after the channel is available.
  • a channel may be a channel, a subchannel of a channel, or one or more subcarriers, which is not limited by the present invention.
  • the availability determination parameter may be a packet error rate of the first candidate bandwidth mode
  • the threshold corresponding to the availability determination parameter may be the first candidate bandwidth mode preset by the station.
  • the maximum allowed packet error rate when the availability determination parameter corresponding to the first candidate bandwidth mode and the threshold corresponding to the availability determination parameter are determined in step 230, a modulation and coding mechanism for transmitting data according to the given first candidate bandwidth mode may be used ( English: Modulation and Coding Scheme (MCS) determines the packet error rate of the first candidate bandwidth mode as the availability determination parameter.
  • MCS Modulation and Coding Scheme
  • the first candidate bandwidth mode corresponding to the first candidate bandwidth mode may be preset. The maximum allowable packet error rate is used as the above threshold.
  • the station when determining a packet error rate of any candidate bandwidth mode (for example, the foregoing first candidate bandwidth mode), the station may determine, according to a modulation and coding mechanism of the first candidate bandwidth mode transmission data. The transmission rate is then predicted based on the transmission rate of the packet error rate PER ⁇ ChannelSet_c, MCS ⁇ of the first candidate bandwidth mode.
  • the maximum allowed packet error rate PER_premit ⁇ ChannelSet_c, MCS ⁇ of any candidate bandwidth mode may be preset by the station according to different bandwidth modes.
  • step 240 when the packet error rate of the first candidate bandwidth mode is smaller than the maximum allowed packet error rate of the first candidate bandwidth mode, that is, when the first candidate bandwidth mode satisfies PER When ⁇ ChannelSet_c, MCS ⁇ PER_premit ⁇ ChannelSet_c, MCS ⁇ , it is determined that the first candidate bandwidth mode is available; when the packet error rate of the first candidate bandwidth mode is greater than or equal to the maximum allowed packet error rate, that is, when the first waiting is The selected bandwidth mode satisfies PER ⁇ ChannelSet_c, MCS ⁇ When PER_premit ⁇ ChannelSet_c, MCS ⁇ , it is determined that the first candidate bandwidth mode is unavailable.
  • the backoff module After traversing all the bandwidth modes supported by the site in the above manner, if at least one bandwidth mode is available, the backoff module will reduce the backoff count value according to the idleness of the channel, and the backoff is completed.
  • the station when the station selects the bandwidth mode adopted by the station and the peer device for data transmission according to the available first candidate bandwidth mode in step 250, the first candidate bandwidth may be determined.
  • the performance index of the mode is then determined based on the performance index for the bandwidth mode used by the site and the peer device to transmit data.
  • the performance index of the first candidate bandwidth mode that is available may be determined according to the interference power of each channel of the first candidate bandwidth mode and the transmit power of the station transmission data; or may be according to the first candidate bandwidth mode.
  • the interference power of each channel, the transmission power of the station transmission data, and the transmission direction of the antenna system determine the performance index of the available first candidate bandwidth mode.
  • the embodiment of the present invention does not limit the performance index of the bandwidth mode.
  • the performance index may be a transmission bandwidth, a transmission capacity, a transmission energy consumption, or a packet error rate.
  • Those skilled in the art can design other forms of performance index as needed, and such designs fall within the scope of the embodiments of the present invention.
  • the station may determine the transmission energy consumption based on the data transmission, the required transmission power, and the transmission duration of the station and the peer device.
  • determining, according to the available first candidate bandwidth mode, the bandwidth mode adopted by the station and the peer device for data transmission includes determining, according to the performance index, a bandwidth mode used by the station and the peer device for data transmission, The site can select the bandwidth mode with the best performance index as the bandwidth mode used for data transmission between the site and the peer device.
  • the bandwidth mode used by the corresponding site and the peer device for data transmission may be the bandwidth mode with the largest transmission bandwidth in the first candidate bandwidth mode; or, when the performance index is the transmission capacity, corresponding The bandwidth mode adopted by the site and the peer device for data transmission may be the bandwidth mode with the largest transmission capacity in the first candidate bandwidth mode; or, when the performance index is the transmission energy consumption, the corresponding site and the peer device perform data transmission.
  • the bandwidth mode adopted may be the bandwidth mode in which the transmission energy consumption is the smallest in the first candidate bandwidth mode; or, when the performance index is the packet error rate, the corresponding bandwidth mode adopted by the site and the peer device for data transmission may be the first The bandwidth mode with the smallest packet error rate in the candidate bandwidth mode.
  • the availability judgment is performed using a threshold corresponding to the bandwidth mode of the site, instead of relying solely on the site where the data transmission has been established.
  • Bandwidth and select the optimal bandwidth mode for data transmission from the available bandwidth modes, so as to avoid excessive protection of the bandwidth of the established data transmission, and the station that needs to transmit data can reasonably utilize the bandwidth resources and increase the throughput of the system. .
  • FIG. 3 is a schematic flow chart of a method for channel availability evaluation of a station according to another embodiment of the present invention. The method of Figure 3 is performed by the site.
  • the station may listen to each channel of any candidate bandwidth mode (for example, the first candidate bandwidth mode) to obtain interference information on each channel of the first candidate bandwidth mode, where the interference information may include interference power. , interference direction, etc.
  • the interference information may include interference power. , interference direction, etc.
  • the station may first determine the transmit power of the first candidate bandwidth mode for data transmission, and allocate the transmit power to each channel of the first candidate bandwidth mode, to obtain each channel of the first candidate bandwidth mode. Transmit power P_TX ⁇ ChannelSet_c ⁇ [i].
  • P_TX ⁇ 1, 2 ⁇ [1] represents the transmission power on channel 1
  • P_TX ⁇ 1, 2 ⁇ [2] represents the transmission power on channel 2.
  • the power backoff value of each channel of the first bandwidth mode may also be obtained according to the minimum required power P_min_req ⁇ ChannelSet_c ⁇ [i] of each channel of the first bandwidth mode.
  • P_backoff ⁇ ChannelSet_c ⁇ [i] P_max/P_min_req ⁇ ChannelSet_c ⁇ [i].
  • the minimum required power P_min_req ⁇ ChannelSet_c ⁇ [i] may be the minimum power required on the channel i of the first candidate bandwidth mode transmission data preset by the station.
  • I_CS_premit ⁇ ChannelSet_c ⁇ [i] I_CS_premit/P_backoff ⁇ ChannelSet_c ⁇ [i].
  • I_CS_premit is the maximum allowable interference power on channel i without considering power backoff.
  • the availability of the first candidate bandwidth mode is determined according to the maximum allowed interference power of each channel of the first candidate bandwidth mode and the interference information of each channel of the first candidate bandwidth mode detected by the station. When the interference power of each channel in the first candidate bandwidth mode is smaller than the maximum allowed interference power of the channel in the first candidate bandwidth mode, determining that the first candidate bandwidth mode is available; when the first candidate bandwidth mode is When the interference power of any channel is greater than or equal to the maximum allowed interference power of the any channel of the first candidate bandwidth mode, it is determined that the first candidate bandwidth mode is unavailable.
  • execution 306 After traversing all of the candidate bandwidth modes supported by the site in the manner described above, if there is at least one first candidate bandwidth mode available, then execution 306 has an available first candidate bandwidth mode. The station then performs channel sounding on the available first candidate bandwidth mode. If the first candidate bandwidth mode including the primary channel is detected to be transmitting data, the station performs backoff. Then, 308 is performed to determine whether the backoff is completed. If the backoff is completed, the backoff count value is decreased, and then 309 is selected to select the optimal bandwidth mode to transmit data, and finally the station 310 and the peer device use the optimal bandwidth mode for data transmission. If the backoff is not completed, continue to listen during the next unit listening period, and then judge whether the backoff is completed according to the interception result.
  • FIG. 4 is a schematic flowchart of a method for determining a bandwidth mode of a station according to still another embodiment of the present invention. The method of Figure 4 is performed by the site.
  • the station may listen to each channel of any candidate bandwidth mode (for example, the first candidate bandwidth mode) to obtain interference information on each channel of the first candidate bandwidth mode, where the interference information may include interference power. Information such as the direction of interference.
  • the station may obtain the power backoff value of each channel of the first candidate bandwidth mode according to the interference power of each channel of the first candidate bandwidth mode:
  • I_CS ⁇ ChannelSet_c ⁇ [i] is the interference power on channel i of the first candidate bandwidth mode detected by the station
  • I_CS_allowed ⁇ ChannelSet_c ⁇ [i] is the maximum allowed on channel i of the first candidate bandwidth mode. Listen for interference power.
  • P_TX is the maximum allowed transmit power on channel i without considering the power backoff value.
  • the station may allocate the transmit power to the multiple channels according to the maximum allowed transmit power on the channel i of the first candidate bandwidth mode and the interference power on the channel i of the first candidate bandwidth mode, and may predict the first candidate to be selected.
  • the transmission capacity R can be the Resource Block Information Rate (RBIR)/Mean Mutual Information per Bit (MMIB)/Efficient Index Signal to Noise Ratio Mapping (English: Effective)
  • RBIR Resource Block Information Rate
  • MMIB Mean Mutual Information per Bit
  • EESM Exponential Signal-to-noise-ratio Mapping
  • the station may first determine a predetermined minimum transmission capacity corresponding to the first candidate bandwidth mode. When the transmission capacity of the first candidate bandwidth mode is less than or equal to the minimum required capacity corresponding to the first candidate bandwidth mode, determining that the first candidate bandwidth mode is unavailable; when the transmission capacity of the first candidate bandwidth mode is greater than the When the minimum required capacity corresponding to the first candidate bandwidth mode is determined, it is determined that the first candidate bandwidth mode is available.
  • execution 406 After traversing all of the bandwidth modes performed by the site in the manner described above, if at least one first candidate bandwidth mode is available, then execution 406 has an available bandwidth mode.
  • the station performs channel sensing on the available first candidate bandwidth mode. If the first candidate bandwidth mode including the primary channel is being transmitted, the station performs backoff, and then performs 408 to determine whether the backoff is completed, if the backoff is performed. Upon completion, the backoff count value is reduced, then 409 is selected to select the optimal bandwidth mode to transmit data, and finally 410 sites and the peer device are used to perform data transmission using the optimal bandwidth mode. If the backoff is not completed, continue to listen during the next unit listening period, and then judge whether to withdraw based on the listening result. carry out.
  • FIG. 5 is a schematic block diagram of a site for channel availability assessment in accordance with an embodiment of the present invention.
  • One example of the apparatus 50 of FIG. 5 is a station (STA) including a first determining unit 51, a second determining unit 52, a third determining unit 53, a fourth determining unit 54, and a fifth determining unit 55.
  • STA station
  • the first determining unit 51 is configured to determine at least one first bandwidth mode supported by the station that needs to perform data transmission and at least one second bandwidth mode supported by the peer device of the data transmission.
  • the second determining unit 52 is configured to determine, according to the at least one first bandwidth mode and the at least one second bandwidth mode, at least one candidate bandwidth mode for the data transmission.
  • the third determining unit 53 is configured to determine a threshold of the availability determination parameter of the first candidate bandwidth mode and the threshold of the availability determination parameter, where the first candidate bandwidth mode is any one of the at least one candidate bandwidth mode.
  • the fourth determining unit 54 is configured to determine the availability of the first candidate bandwidth mode according to the availability determination parameter determined by the third determining unit and a threshold corresponding to the availability determining parameter.
  • the fifth determining unit 55 is configured to determine, according to the available first candidate bandwidth mode determined by the fourth determining unit, a bandwidth mode adopted by the station and the peer device for data transmission.
  • the availability judgment is performed using a threshold corresponding to the bandwidth mode of the site, instead of relying solely on the bandwidth of the site where the data transmission has been established, so that the established data transmission can be avoided as much as possible.
  • a threshold corresponding to the bandwidth mode of the site instead of relying solely on the bandwidth of the site where the data transmission has been established, so that the established data transmission can be avoided as much as possible.
  • the various units of the apparatus 50 of FIG. 5 may perform the various processes of the methods illustrated in FIGS. 2, 3, and 4, and are not described in detail to avoid redundancy.
  • the third determining unit 53 is specifically configured to: listen to each channel of the first candidate bandwidth mode to obtain each channel of the first candidate bandwidth mode. Interference power, and determining a maximum allowed interference power of each channel in the first candidate bandwidth mode; wherein the availability determination parameter is interference power of each channel of the first candidate bandwidth mode, the availability determination parameter The corresponding threshold is the maximum allowed interference power of each channel of the first candidate bandwidth mode.
  • the fourth determining unit 54 is specifically configured to be used as the first Determining that the first candidate bandwidth mode is available when the interference power of each channel of the candidate bandwidth mode is less than the maximum allowed interference power of each channel of the first candidate bandwidth mode; or, when the first When the interference power of any channel of a candidate bandwidth mode is greater than or equal to the maximum allowed interference power of the any channel, it is determined that the first candidate bandwidth mode is unavailable.
  • the third determining unit 53 is specifically configured to allocate, according to the transmit power of the data transmission, the transmit power of the data transmission to each channel of the first candidate bandwidth mode. And obtaining a transmit power of each channel in the first candidate bandwidth mode, and determining a power backoff value of each channel in the first candidate bandwidth mode according to the transmit power of each channel in the first candidate bandwidth mode. And determining, according to the power backoff value of each channel of the first candidate bandwidth mode, a maximum allowed interference power of each channel of the first candidate bandwidth mode.
  • the third determining unit 53 is specifically configured to obtain a minimum required power of each channel of the first candidate bandwidth mode, and each channel according to the first candidate bandwidth mode. a minimum required power, determining a power backoff value of each channel of the first candidate bandwidth mode, and determining the first candidate to be selected according to a power backoff value of each channel of the first candidate bandwidth mode The maximum allowed interference power for each channel of the bandwidth mode.
  • the third determining unit 53 is specifically configured to: listen to each channel of the first candidate bandwidth mode, and determine each channel of the first candidate bandwidth mode. Interference power, determining, according to the interference power of each channel of the first candidate bandwidth mode, a maximum allowed transmit power of each channel of the first candidate bandwidth mode, and transmitting the transmit power of the data according to the station, The interference power of each channel of the first candidate bandwidth mode and the maximum allowed transmission power of each channel of the first candidate bandwidth mode determine a transmission capacity of the first candidate bandwidth mode; wherein the availability determination parameter is The transmission capacity of the first candidate bandwidth mode, and the threshold corresponding to the availability determination parameter is a minimum required transmission capacity corresponding to the first candidate bandwidth mode preset by the station.
  • the fourth determining unit 54 is specifically configured to: when the transmission capacity of the first candidate bandwidth mode is greater than a minimum required transmission capacity corresponding to the first candidate bandwidth mode, The first candidate bandwidth mode is available; or, when the transmission capacity of the first candidate bandwidth mode is less than or equal to the minimum required transmission capacity corresponding to the first candidate bandwidth mode, determining that the first candidate bandwidth mode is unavailable use.
  • the third determining unit 53 is specifically configured to determine, according to the modulation and coding mechanism of the first candidate bandwidth mode transmission data, the error of the first candidate bandwidth mode. a packet rate, wherein the availability determination parameter is a packet error rate of the first candidate bandwidth mode, and the threshold corresponding to the availability determination parameter is a maximum allowed packet error corresponding to the first candidate bandwidth mode preset by the site. rate.
  • the fourth determining unit 54 is specifically configured to: when the packet error rate of the first candidate bandwidth mode is smaller than the maximum allowed corresponding to the first candidate bandwidth mode. When the packet error rate is determined, determining that the first candidate bandwidth mode is available; or, when the packet error rate of the first candidate bandwidth mode is greater than or equal to a maximum allowed packet error rate corresponding to the first candidate bandwidth mode, It is determined that the first candidate bandwidth mode is unavailable.
  • the fifth determining unit 55 is specifically configured to: according to the interference power of each channel of the first candidate bandwidth mode and the transmit power of the data transmitted by the station, or according to the Determining the interference power of each channel of the first candidate bandwidth mode, the transmission power of the data transmitted by the station, and the transmission direction of the antenna system, determining a performance index of at least one of the first candidate bandwidth modes available, and according to the performance The index determines a bandwidth mode adopted by the station and the peer device for the data transmission; wherein the performance index includes at least one of the following parameters: a transmission bandwidth, a transmission capacity, a transmission energy consumption, and a packet error rate.
  • the at least one candidate bandwidth mode is an intersection of at least a first bandwidth mode and at least one second bandwidth mode.
  • the station of the channel usability evaluation according to the embodiment of the present invention in FIG. 5 may correspond to the corresponding subject in the method of performing the usability evaluation of the channel according to the embodiment of the present invention in FIGS. 2 to 4, and each of FIG.
  • the above and other operations and/or functions of the unit or module are respectively omitted in order to implement the corresponding processes of the methods in FIG. 2 to FIG. 4 for brevity.
  • the station 600 of FIG. 6 is a schematic block diagram of a site for channel availability assessment in accordance with another embodiment of the present invention.
  • the station 600 of FIG. 6 can be used to implement the steps and methods of the above method embodiments.
  • the station 600 of FIG. 6 includes a processor 610, a memory 620, a receiving circuit 630, and a transmitting circuit 640.
  • the processor 610, the memory 620, the receiving circuit 630, and the transmitting circuit 640 are connected by a bus system 660.
  • the station 600 may also include an antenna 650 or the like.
  • Memory 620 can include read only memory and random access memory for storing instructions and providing instructions and data to processor 610.
  • the processor 610 controls the operation of the station 600 for executing instructions stored by the memory 620 to control the receiver 630 to receive signals.
  • a portion of the memory 620 may also include non-volatile line random access memory (NVRAM for short).
  • transmit circuitry 640 and receive circuitry 630 can be coupled to antenna 650.
  • the various components of the station 600 are coupled together by a bus system 660, wherein In addition to the data bus, bus system 660 includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 660 in the figure.
  • Processor 610 may be an integrated circuit chip with signal processing capabilities.
  • the processor 510 described above may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or a transistor logic device. , separate hardware components.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like. Processor 610 reads the information in memory 620 in conjunction with its hardware to control various components of site 600.
  • the method 600 of FIG. 6 can implement the methods of FIGS. 2, 3, and 4, and will not be described in detail in order to avoid redundancy.
  • station 600 does the following:
  • the availability of the first candidate bandwidth mode is determined according to the availability determination parameter and the threshold corresponding to the availability determination parameter.
  • the bandwidth mode adopted by the station and the peer device for data transmission is determined according to the available first candidate bandwidth mode.
  • the embodiment of the present invention uses the threshold corresponding to the bandwidth mode of the site to perform availability judgment, and not only depends on the bandwidth of the site where the data transmission has been established, so that the established data can be avoided as much as possible. Over-protection of the transmitted bandwidth, the site that needs to transmit data can make reasonable use of bandwidth resources and increase the throughput of the system.
  • the processor 610 may listen to each channel of the first candidate bandwidth mode, obtain interference power of each channel of the first candidate bandwidth mode, and determine the first The maximum allowable interference power of each channel in the candidate bandwidth mode; wherein the availability determination parameter is the interference power of each channel of the first candidate bandwidth mode, and the threshold corresponding to the availability determination parameter is the first to-be The maximum allowed interference power for each channel of the bandwidth mode is selected.
  • the processor 610 may: when the interference power of each channel of the first candidate bandwidth mode is less than the maximum allowed interference power of each channel of the first candidate bandwidth mode, Determining that the first candidate bandwidth mode is available; or determining that the first candidate is selected when the interference power of any channel of the first candidate bandwidth mode is greater than or equal to the maximum allowed interference power of the any channel. Bandwidth mode is not available.
  • the processor 610 may allocate, according to the transmit power of the data transmission, the transmit power of the data transmission to each channel of the first candidate bandwidth mode, to obtain the first candidate. Determining, according to the transmit power of each channel of the first candidate bandwidth mode, a power backoff value of each channel of the first candidate bandwidth mode, according to the first waiting The power backoff value of each channel of the bandwidth mode is selected, and the maximum allowed interference power of each channel of the first candidate bandwidth mode is determined.
  • the processor 610 may obtain a minimum required power of each channel of the first candidate bandwidth mode, and determine the minimum required power of each channel of the first candidate bandwidth mode. Determining a power backoff value of each channel of the first candidate bandwidth mode, and determining, according to a power backoff value of each channel of the first candidate bandwidth mode, each channel of the first candidate bandwidth mode Maximum allowable interference power.
  • the processor 610 may listen to each channel of the first candidate bandwidth mode, and determine interference power of each channel of the first candidate bandwidth mode, according to the first The interference power of each channel of the candidate bandwidth mode determines the maximum allowed transmit power of each channel of the first candidate bandwidth mode, and transmits the transmit power of the data according to the station, the first candidate bandwidth mode. Determining the transmission capacity of the first candidate bandwidth mode by the interference power of each channel and the maximum allowed transmission power of each channel of the first candidate bandwidth mode; wherein the availability determination parameter is the first candidate bandwidth mode
  • the transmission capacity, the threshold corresponding to the availability determination parameter is a minimum required transmission capacity corresponding to the first candidate bandwidth mode preset by the station.
  • the processor 610 may determine the first candidate bandwidth mode when a transmission capacity of the first candidate bandwidth mode is greater than a minimum required transmission capacity corresponding to the first candidate bandwidth mode.
  • the first candidate bandwidth mode is determined to be unavailable when the transmission capacity of the first candidate bandwidth mode is less than or equal to the minimum required transmission capacity corresponding to the first candidate bandwidth mode.
  • the processor 610 may determine, according to the modulation and coding mechanism of the first candidate bandwidth mode transmission data, a packet error rate of the first candidate bandwidth mode; wherein the availability The determining parameter is a packet error rate of the first candidate bandwidth mode, and the threshold corresponding to the availability determining parameter is a maximum allowed packet error rate corresponding to the first candidate bandwidth mode preset by the station.
  • the processor 610 may determine, when the packet error rate of the first candidate bandwidth mode is less than the maximum allowed packet error rate corresponding to the first candidate bandwidth mode.
  • the first candidate bandwidth mode is available; or, when the packet error rate of the first candidate bandwidth mode is greater than or equal to a maximum allowed packet error rate corresponding to the first candidate bandwidth mode, determining the first candidate bandwidth. Mode is not available.
  • the processor 610 may: according to the interference power of each channel of the first candidate bandwidth mode and the transmit power of the data transmitted by the station, or according to the first candidate bandwidth mode. Determining the interference power of each channel, the transmission power of the data transmitted by the station, and the transmission direction of the antenna system, determining a performance index of at least one of the first candidate bandwidth modes available, and determining the site and the pair according to the performance index The bandwidth mode adopted by the end device for the data transmission; wherein the performance index includes at least one of the following parameters: a transmission bandwidth, a transmission capacity, a transmission energy consumption, and a packet error rate.
  • the embodiment of the present invention uses the threshold corresponding to the bandwidth mode of the site to perform availability judgment, and not only depends on the bandwidth of the site where the data transmission has been established, so that the established data can be avoided as much as possible. Over-protection of the transmitted bandwidth, the site that needs to transmit data can make reasonable use of bandwidth resources and increase the throughput of the system.
  • the processor 610 may be a central processing unit (English: Central Processing Unit, CPU for short), and the processor 610 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 620 can include read only memory and random access memory and provides instructions and data to the processor 610. A portion of the memory 620 can also include a non-volatile random access memory. For example, the memory 620 can also store information of the device type.
  • the bus system 660 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 660 in the figure.
  • each step of the above method may be integrated by hardware in the processor 610.
  • the logic circuit or the instruction in the form of software is completed.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 620, and the processor 610 reads the information in the memory 620 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the processor controls the operation of the communication device, which may also be referred to as a CPU.
  • the memory can include read only memory and random access memory and provides instructions and data to the processor. A portion of the memory may also include non-volatile line random access memory (NVRAM).
  • the communication device can embed or itself be a wireless communication device such as a mobile telephone, and can also include a carrier that houses the transmitting circuitry and the receiving circuitry to allow for data transmission and reception between the communications device and the remote location.
  • the transmit and receive circuits can be coupled to the antenna.
  • the various components of the communication device are coupled together by a bus (which may also be referred to as a bus system), wherein the bus includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • a bus which may also be referred to as a bus system
  • the bus includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as buses in the figure.
  • the communication device may also include a processing unit for processing signals, and further includes a power controller, a decoding processor.
  • the decoder in a specific different product may be integrated with the processing unit.
  • the processor may implement or perform the steps and logic blocks disclosed in the method embodiments of the present invention.
  • the processor can be a microprocessor or the processor can be any conventional processor, decoder or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the decoding unit or the processing unit reads the information in the memory, and completes the steps of the above method in combination with the hardware thereof.
  • the processor may be a central processing unit (English: Central Processing Unit, CPU for short), and the processor may also be other general-purpose processors.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • system and “network” are used interchangeably herein. It should be understood that the term “and/or” herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • the disclosed systems, devices, and methods 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 coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used 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 U disk, a mobile hard disk, a read only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and the like.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

La présente invention concerne un procédé et un appareil pour évaluer la disponibilité de canal d'une station. Le procédé consiste : à déterminer au moins un premier mode de bande passante, pris en charge par une station qui a besoin de transmettre des données, et au moins un second mode de bande passante, pris en charge par le dispositif cible de la transmission de données (210); selon au moins un premier mode de bande passante et au moins un second mode de bande passante, à déterminer au moins un mode de bande passante candidat, utilisé pour une transmission de données (220); à déterminer le paramètre de détermination de disponibilité et un seuil correspondant d'un premier mode de bande passante candidat qui est l'un d'au moins un mode de bande passante candidat (230); selon le paramètre de détermination de disponibilité et le seuil correspondant, à déterminer la disponibilité du premier mode de bande passante candidat (240); selon le premier mode de bande passante candidat disponible, à déterminer le mode de bande passante utilisé par la station pour une transmission de données (250). Lorsque la présente invention est utilisée pour évaluer une disponibilité de canal, la station peut éviter une surprotection au niveau de la bande passante de transmission de données qui a été réglée et peut utiliser raisonnablement une ressource de bande passante et augmenter le débit du système.
PCT/CN2014/090317 2014-11-05 2014-11-05 Procédé et appareil pour évaluer la disponibilité de canal de station Ceased WO2016070350A1 (fr)

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PCT/CN2014/090317 WO2016070350A1 (fr) 2014-11-05 2014-11-05 Procédé et appareil pour évaluer la disponibilité de canal de station

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120082147A1 (en) * 2010-10-04 2012-04-05 Yong Liu Determining a communication channel from a plurality of possible channel bandwidths
US20140119303A1 (en) * 2012-10-30 2014-05-01 Electronics And Telecommunications Research Institute Operating method of access point (ap) and station for coexistence of basic service sets having different bandwidths
CN104038950A (zh) * 2013-03-06 2014-09-10 美国博通公司 无线通信中的空闲信道评估水平

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120082147A1 (en) * 2010-10-04 2012-04-05 Yong Liu Determining a communication channel from a plurality of possible channel bandwidths
US20140119303A1 (en) * 2012-10-30 2014-05-01 Electronics And Telecommunications Research Institute Operating method of access point (ap) and station for coexistence of basic service sets having different bandwidths
CN104038950A (zh) * 2013-03-06 2014-09-10 美国博通公司 无线通信中的空闲信道评估水平

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