WO2017101629A1 - 一种随机接入参数的更新方法及相关设备 - Google Patents

一种随机接入参数的更新方法及相关设备 Download PDF

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Publication number
WO2017101629A1
WO2017101629A1 PCT/CN2016/106070 CN2016106070W WO2017101629A1 WO 2017101629 A1 WO2017101629 A1 WO 2017101629A1 CN 2016106070 W CN2016106070 W CN 2016106070W WO 2017101629 A1 WO2017101629 A1 WO 2017101629A1
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Prior art keywords
random access
access
station
feedback information
attempts
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PCT/CN2016/106070
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English (en)
French (fr)
Inventor
李彦淳
李云波
罗毅
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华为技术有限公司
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Priority claimed from CN201610460511.0A external-priority patent/CN106900076B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2017101629A1 publication Critical patent/WO2017101629A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for updating random access parameters and related devices.
  • the network side device Before the data transmission between the user equipment and the network side device, a random access procedure needs to be initiated.
  • the network side device provides multiple random access resources to multiple user equipments, and each user equipment uses random access parameters to randomly select resources for access, specifically determined by random access parameters. A random number is generated within the range, and resources are selected according to the random number for access. If the user equipment receives the acknowledgement frame sent by the network side device, it indicates that the user equipment is successfully accessed randomly, and then the data can be transmitted. However, since the user equipment randomly selects resources from a plurality of randomly accessible resources, there may be cases where two or more user equipments select the same resource, so that random access conflict occurs, resulting in random access. Failure failed.
  • the prior art increases the random access parameter by increasing the constant or multiplying the coefficient.
  • the resource is selected again for access according to the expanded random access parameter.
  • the random access value corresponding to the resource is limited.
  • An embodiment of the present invention provides a method for updating a random access parameter and a related device, which can update a random access parameter according to feedback information of a random access packet, so that the random access parameter is more matched with the current network environment.
  • the first aspect of the embodiments of the present invention provides a method for updating a random access parameter, including: the access point updates the current random access according to the feedback information carried by the randomly accessed random access packet sent by one or more stations. Parameters, and send updated random access parameters to all stations or parts of the network coverage, so that all stations or parts of the stations are randomly accessed according to the updated random access parameters.
  • a random access packet is sent by a station, and the station selects a random access packet that is randomly accessible according to the current random access parameter.
  • the access point learns the current network environment status of the random access through the feedback information of one or more sites, and then can update the random access parameters to better match the current network environment, and improve the random access parameter update. accuracy.
  • the method before the access point acquires the random access packet sent by the one or more sites that the random access succeeds, the method further includes: the access point broadcast is used to indicate that one or more A random access channel of a randomly accessed resource, after receiving a trigger frame at any one station, the station may send a random access packet through a randomly accessible resource.
  • the access point When receiving a random access packet sent by any one station, the access point feeds back to the station that sends the random access packet an indication frame for indicating that the random access packet is successfully received, and accordingly, if the station receives the acknowledgement frame , indicating that the site can start transmitting data to be transmitted.
  • the feedback information is used to indicate a current random access situation of the site, for example, including the number of attempts to access and the number of successful accesses; or, including the number of attempts to access; Or, including the number of times the retransmission attempts to access and the number of successful accesses; or, the number of times the retransmission attempts are accessed; or the ratio of the number of successful accesses to the number of attempts to access, and thus the successful access
  • the ratio of the number of times to the number of attempts to access obtains the current probability of random access success, so that the access point can know the current network environment and determine the random access parameters that match the current network environment.
  • the access point records the number of successful accesses of the station that sends the random access packet, to calculate the number of successful accesses and the number of attempts to access. The ratio.
  • the access point when the access point updates the current random access parameter according to the feedback information carried by the randomly received random access packet sent by the one or more sites, the access point obtains the access point successfully.
  • the feedback information carried by the received random access packet sent by one or more sites when the feedback information includes the number of attempts to access and the number of successful accesses, or when the feedback information includes the number of attempts to access; or And determining, when the feedback information includes a ratio of the number of successful accesses to the number of attempts to access, determining an average of a ratio of the number of successful accesses to the number of attempts to access, and further determining the number of successful accesses according to the determined number of successful accesses.
  • the average of the ratios of the number of attempts to access updates the current random access parameters.
  • the current random access parameter may include a contention threshold or an access probability, and different update manners are adopted for different random access parameters, for example, when the ratio of the number of successful accesses to the number of attempts to access is greater than the first At the threshold, the access point decreases the contention window value according to the first preset ratio; when the average value of the ratio of the number of successful accesses to the number of attempts to access is less than the second threshold, the access point follows the third preset ratio.
  • the competition window value is increased; or, when the average value of the ratio of the number of successful accesses to the number of attempts to access is greater than the first threshold, the access point increases the access probability according to the second preset ratio; When the average of the ratio of the number of times to the number of attempts to access is less than the second threshold, the access point reduces the access probability by a fourth predetermined ratio.
  • the average of the ratio of the number of successful accesses to the number of attempts to access reflects the network environment in which the site is currently located, thereby obtaining random access parameters that more closely match the network environment.
  • the access point when the access point updates the current random access parameter according to the feedback information carried by the randomly received random access packet sent by the one or more sites, the access point obtains the access point successfully.
  • the feedback information carried by the received random access packet sent by one or more stations when the feedback information includes the number of attempts to access and the number of successful accesses, or when the feedback information includes the number of attempts to access, The ratio of the number of successful accesses to the number of attempts to access each site; the access point calculates the number of competing sites based on the current random access parameters and the ratio of the number of successful accesses per site to the number of attempts to access. And updating the current random access parameter according to the calculated number of competing sites. Since the feedback information includes the current random access situation of each station, the random access parameter updated according to the feedback information can be more matched with the current network environment.
  • the access point updates the current random access parameter according to the calculated number of competing sites.
  • the current random access parameter may include a contention window value or an access probability.
  • the update mode is different. For example, if the current random access parameter is a contention window value, the access point adopts the contention station. The corresponding value of the number of points updates the contention window value. If the current random access parameter is an access probability, the access point updates the access probability by using a reciprocal of the corresponding value of the number of competing stations.
  • a second aspect of the embodiments of the present invention provides another method for updating random access parameters, including: receiving, by a station, a random access parameter sent by an access point, when the station initiates random access, the station adopts the received random access.
  • the parameter selects a randomly accessible resource to send a random access packet carrying feedback information of the station.
  • the method before the receiving, by the station, the random access parameter broadcast by the access point, the method further includes: the station receiving the trigger frame broadcast by the access point, where the trigger frame is used to indicate that the one or more randomizable A random access channel of the accessed resource.
  • the feedback information is used to indicate a current random access situation of the site, for example, including the number of attempts to access and the number of successful accesses; or, including the number of attempts to access; Or, including the number of times the retransmission attempts to access and the number of successful accesses; or, the number of times the retransmission attempts are accessed; or the ratio of the number of successful accesses to the number of attempts to access, and thus the successful access
  • the ratio of the number of times to the number of attempts to access obtains the current probability of random access success, so that the access point can know the current network environment and determine the random access parameters that match the current network environment.
  • the station when the station initiates random access, uses the received random access parameter value to select a randomly accessible resource to send the random access packet, and further performs the step: when pre-preparing If the access point that does not receive the feedback of the access point within the time range indicates that the access point successfully receives the acknowledgement frame of the random access packet, the site updates the feedback information, and resends the random access packet carrying the updated feedback information to the access point. .
  • a third aspect of the embodiments of the present invention provides an access point, where the access point has a function of implementing an update method of a random access parameter provided by the first aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware, the hardware or software including one or more units corresponding to the functions of the update method of the random access parameters provided by the first aspect.
  • the structure of the access point includes a processor, an input device, and an output device that perform the corresponding functions in the first aspect for the access point.
  • Input device and output device for support Holding the communication between the access point and the site, the output device transmits the information or instructions involved in the first aspect to the site, and the input device receives the information or instructions sent by the site involved in the first aspect.
  • the access point also includes a memory for coupling with a processor that stores program instructions and data necessary for the access point.
  • a fourth aspect of the embodiments of the present invention provides a computer storage medium storing a computer program capable of causing a computer to complete the random connection provided by the first aspect when the computer program in the computer storage medium is read into the computer Enter all the steps of the parameter update method.
  • a fifth aspect of the embodiments of the present invention provides a station, which has a function of implementing an update method of a random access parameter provided by the second aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware, and the hardware or software includes one or more units corresponding to the functions of the update method of the random access parameters provided by the second aspect.
  • the structure of the site includes a processor, an input device, and an output device that perform the corresponding functions in the second aspect for the site.
  • the input device and the output device are configured to support communication between the station and the access point, and the output device sends the information or instruction involved in the second aspect to the access point, and the input device receives the access point sent in the second aspect.
  • the site also includes a memory for coupling with the processor that holds program instructions and data necessary for the site.
  • a sixth aspect of the embodiments of the present invention provides another computer storage medium storing a computer program capable of causing a computer to perform the randomization provided by the second aspect when the computer program in the computer storage medium is read to the computer All steps of the access parameter update method.
  • the access point updates the current random access parameter by using the feedback information carried by the random access packet sent by the successfully received one or more sites, because the feedback information includes the current random connection of each site. Therefore, the random access parameters updated by the access point according to the feedback information are more closely matched with the current network environment, thereby improving the accuracy of random access parameter update, thereby improving resource utilization.
  • FIG. 1 is a schematic diagram of a network architecture diagram
  • FIG. 2 is a schematic flowchart of a method for updating a random access parameter according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of another method for updating random access parameters according to an embodiment of the present invention.
  • step S308 is a schematic flowchart of step S308 according to an embodiment of the present invention.
  • FIG. 4b is a schematic flowchart of step S308 according to an embodiment of the present disclosure.
  • FIG. 4c is another schematic flowchart of step S308 according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an access point according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an update unit according to an embodiment of the present invention.
  • FIG. 6b is another schematic structural diagram of an update unit according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a station according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of another access point according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of another station according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart diagram of another method for updating random access parameters according to an embodiment of the present invention.
  • FIG. 11 is a schematic flowchart diagram of another method for updating random access parameters according to an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of another method for updating random access parameters according to an embodiment of the present invention.
  • FIG. 13a is a schematic flowchart of step S502 in FIG. 10 according to an embodiment of the present disclosure
  • FIG. 13b is another schematic flowchart of step S502 in FIG. 10 according to an embodiment of the present disclosure
  • FIG. 14 is a diagram of an example of random access provided by an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention.
  • an access point and a plurality of sites may be included, for example, Site 1, Site 2, Site 3, ..., Site N.
  • the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division multiple access.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • a station may include, but is not limited to, a terminal (Terminal), a mobile terminal (Mobile Terminal), etc., and the station may communicate with one or more core networks via a radio access network.
  • the site can be a mobile phone, a tablet, a personal digital assistant (PDA), a mobile Internet device (MID), a smart wearable device (such as a smart watch, a smart bracelet), and the like. Devices that exchange data with the radio access network.
  • the access point may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or may be a base station (NodeB, NB) in WCDMA. Therefore, the embodiment of the present invention is not limited in the embodiment of the present invention.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • the access point updates the current random access parameter according to the feedback information carried by the randomly received random access packet sent by one or more stations, where a random access packet is A site sends a randomly accessible resource according to the current random access parameter for random access.
  • a random access packet carries feedback information of one site, and the access point reaches all sites or parts of the network coverage.
  • the updated random access parameters are sent so that all stations or parts of the stations initiate random access according to the updated random access parameters. Since the feedback information includes the current random access situation of each station, the random access parameter updated by the access point according to the feedback information is more matched with the current network environment, thereby improving the accuracy of random access parameter update, thereby improving resources. Utilization rate.
  • FIG. 2 is a schematic flowchart of a method for updating random access parameters according to an embodiment of the present invention. As shown in FIG. 2, the method in the embodiment of the present invention may include the following steps S201 to S204.
  • the access point updates the current random access parameter according to the feedback information carried by the randomly accessed random access packet sent by the at least one station.
  • a random access procedure needs to be initiated.
  • the access point provides multiple randomly accessible resources to multiple sites within the network coverage. Each site selects resources according to the current random access parameters and sends random connections through the selected resources.
  • the station receives an acknowledgment frame sent by the access point, it indicates that the random access is successful. If the station does not receive the acknowledgment frame sent by the access point, the random access fails, and the station needs to select the resource to send the random access packet according to the current random access parameter again.
  • the access point updates the current random access parameter according to the feedback information carried by the randomly accessed random access packet sent by one or more stations.
  • the successfully received random access packet refers to that the access point verifies the validity of the random access packet after receiving the random access packet.
  • the parity bit or the cyclic redundancy check in the random access packet may be verified.
  • the Cyclic Redundancy Check (CRC) field is checked to determine whether it is successfully received. If the check is passed, it indicates that the random access packet is successfully received. If the check fails, the random access packet is discarded and the random access packet is not successfully received.
  • a random access packet is sent by a station when random access is selected according to the current random access parameter, and a random access packet carries feedback of a site. information.
  • the access point may assign the determined random access parameter to the The current random access parameter, in turn, updates the current random access parameters.
  • the random access point may determine, according to feedback information of the random access packet of one or more sites, a degree of competition of the current random access resource, and then calculate a relatively accurate random access parameter, and adopt The calculated random access parameters update the current random access parameters.
  • the feedback information of the random access packet includes the number of attempts to access the random access of the station once, and the access point broadcasts the resources including 16 randomly accessible resources within the network coverage, if the access point Receiving the random access packets sent by the three stations, and the feedback information of the random access packets of each site indicates that the number of attempts of random access attempts is higher than a preset threshold, indicating that the site is not easily random accessed successfully, but The number of resources provided is sufficient to meet the needs of the site, so the setting of the random access parameter does not conform to the current network environment, and therefore the access point is carried according to the random access packet sent by at least one station successfully received.
  • the feedback information is used to update the current random access parameters to improve the success rate of the random access of the station, thereby improving the utilization rate
  • the current random access parameter may be determined by a wireless local area network standard, that is, the station sends a random access packet to the access point by using a default random access parameter; or, the current random The access parameter is determined by the access point, that is, before the station sends a random access packet to the access point, the access point broadcasts to or from any site within the network coverage.
  • the station multicasts the current random access parameters, so that the station performs random access according to the random access parameters of the broadcast.
  • the feedback information of one site includes the number of times the site attempts to access and the number of successful accesses; or the feedback information includes the number of attempts to access; or the feedback information includes the number of successful accesses and The ratio of the number of attempts to access; or the feedback information includes the number of times the retransmission attempt is accessed and the number of successful accesses; or the feedback information includes the number of retransmission attempts, where the retransmission attempt is received
  • the number of entries is one less than the number of attempts to access.
  • the access point sends the updated random access parameter to the target station.
  • the access point sends the updated random access parameter to the target station, so that the target station initiates random access according to the updated random access parameter.
  • the target site is all sites or parts of the site within the coverage of the access point network.
  • the access point may broadcast the updated random access parameters to all stations within the network coverage, so that all stations in the network coverage perform random access according to the updated random access parameters.
  • the access point may select a part of the site, and multicast the updated random access parameter to the part of the site, so that some stations perform random access according to the updated random access parameter.
  • the station receives a random access parameter sent by the access point.
  • the station receives the random access parameter sent by the access point.
  • the random access parameter is a basis for the station to select a resource that can be randomly accessed, that is, the station sends a random access to the access point by selecting a randomly accessible resource according to the random access parameter. package. It should be noted that the station is any one of the stations or part of the stations that receive the random access parameters sent by the access point.
  • the station uses the received random access parameter to select a randomly accessible resource to send a random access packet, where the random access packet carries feedback of the site. information.
  • the station uses the updated random access parameter to select a randomly accessible resource to send a random access packet.
  • the random access packet carries feedback information of the site.
  • the feedback information includes the number of times the site attempts to access and the number of successful accesses; or the feedback information includes the number of attempts to access; or the feedback information includes the number and attempts of successful access.
  • the current random access parameter may include a contention threshold or an access probability.
  • the random access parameter is a contention threshold
  • the random access mode that the station can adopt is the backoff counter access.
  • the updated random access parameter is a contention threshold CW in the backoff counter access mode, and the station randomly generates a random number in a range of 0 to CW, and then according to the number of randomly accessible resources and/or The other condition updates the random number.
  • the station selects the target resource to send the random access packet among the randomly accessible resources.
  • the random access parameter is the access probability
  • the random access mode that the station can adopt is the probabilistic access mode
  • the updated random access parameter is the access probability in the probabilistic access mode.
  • the site is at A random number is randomly generated between 0 and 1, and when the random number is smaller than the access probability, the target resource is selected to send a random access packet among the randomly accessible resources.
  • the access point updates the current random access parameter by using the feedback information carried by the random access packet sent by the successfully received one or more sites, because the feedback information includes the current random connection of each site. Therefore, the random access parameters updated by the access point according to the feedback information are more closely matched with the current network environment, thereby improving the accuracy of random access parameter update, thereby improving resource utilization.
  • FIG. 3 is a schematic flowchart diagram of another method for updating random access parameters according to an embodiment of the present invention.
  • the method in the embodiment of the present invention may include the following steps S301 to S311.
  • the access point broadcasts a trigger frame in a network coverage, where the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • a random access procedure needs to be initiated.
  • the access point provides multiple randomly accessible resources to multiple sites within the network coverage. Each site selects resources according to the current random access parameters and sends random connections through the selected resources. Into the package. If the station receives an acknowledgment frame sent by the access point, it indicates that the random access is successful. If the station does not receive the acknowledgment frame sent by the station, it considers that the random access fails, and the station needs to select the resource to send the random access packet according to the current random access parameter again.
  • the access point broadcasts a trigger frame within network coverage.
  • the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • the trigger frame is used to indicate a resource that is available for sub-channels, sub-resource blocks, or other resource formats for random access.
  • the triggering frame may be used to indicate a scheduling access channel, such as a resource that includes one or more schedulable accesses, which is not limited in this embodiment of the present invention.
  • the station receives a trigger frame broadcast by the access point.
  • the station receives a trigger frame broadcast by the access point, and when the site initiates the random access, the station selects a resource according to the current random access parameter and sends a random access packet by using the resource.
  • the site is any one of the network coverage areas of the access point.
  • the current random access parameter may be determined by a wireless local area network standard, that is, the station sends a random access packet to the access point by using a default random access parameter; or, the current random access
  • the parameter is determined by the access point, that is, before the station sends a random access packet to the access point, the access point broadcasts to any site within the network coverage or to a part of the site group
  • the current random access parameters are broadcasted to enable the station to perform random access according to the broadcast random access parameters.
  • the station selects a randomly accessible resource according to the current random access parameter, and sends a random access packet carrying the feedback information.
  • the station sends a random access packet by using the random access channel, where the random access packet carries feedback information.
  • the feedback information is used to feed back the random access of the site according to the current random access parameter.
  • the feedback information includes the number of times the site attempts to access and the number of successful accesses; or The feedback information includes the number of attempts to access; or the feedback information includes a ratio of the number of successful accesses to the number of attempts to access; or the feedback information includes the number of retransmission attempts and the successful access.
  • the number of times; or the feedback information includes the number of times the retransmission attempt is accessed, wherein the number of times the retransmission attempt is accessed is one less than the number of attempts to access.
  • the current random access parameter may include a contention threshold or an access probability.
  • the random access parameter is a contention threshold
  • the random access mode that the station can adopt is the backoff counter access.
  • the current random access parameter is a contention threshold CW in the backoff counter access mode, and the station randomly generates a random number in a range of 0 to CW, and then according to the number of randomly accessible resources and/or other conditions. Updating the random number, when the random number is updated to a value less than or equal to 0, the station selects the target resource to send the random access packet among the randomly accessible resources.
  • the random access parameter is the access probability
  • the random access mode that the station can adopt is the probabilistic access mode
  • the current random access parameter is the access probability in the probabilistic access mode.
  • the station randomly generates a random number between 0 and 1. When the random number is smaller than the access probability, the target resource is selected to send a random access packet among the randomly accessible resources.
  • the feedback information may include the number of attempts to access and the number of successful accesses after the site initiates the random access; or the feedback information includes the site initiating the random access. The number of times of subsequent attempts to access; or the feedback information includes the number of retransmission attempts and the number of successful accesses after the site initiates the random access; or the feedback information includes the site The number of times the retransmission attempt is initiated after the random access is initiated; or the feedback information includes the number of attempts to access the site and the number of successful accesses in the preset time range; or the feedback The information includes the number of attempts to access the site within a preset time range; or, The feedback information includes the number of retransmission attempts and the number of successful accesses of the station in a preset time range; or the feedback information includes retransmission attempts of the station within a preset time range. The number of entries.
  • the preset time range may be a range between a first time when the station is currently located and a second time that is earlier than the
  • the station may directly send the number of attempts to access and the number of successful accesses, that is, when the site is the Nth When the random access packet is sent and the number of successful accesses is M, the number of attempts to access is N, and the number of successful accesses is M.
  • the initial value of the number of successful accesses is 0.
  • the number of successful accesses is increased by 1 to obtain the number of successful accesses; or the modified number of attempts to access and the number of successful accesses are used, for example, the site may be pre-agreed
  • the interval quantizes the above number and value, and uses one or more bits to indicate that the value belongs to one of the intervals. Accordingly, the access point can recover or estimate the value of the site feedback through the bit fed back by the station.
  • the access point When successfully receiving a random access packet sent by any one of the sites in the network coverage by using the random access channel, the access point feeds back an acknowledgement frame.
  • the access point when successfully receiving a random access packet sent by the random access channel by any one of the network coverage areas, the access point feeds back an acknowledgement frame, and the acknowledgement frame is used to send the The site of the random access packet indicates that the random access packet was successfully received.
  • the successfully received random access packet refers to that the access point verifies the validity of the random access packet after receiving the random access packet.
  • the check bit or the CRC field in the random access packet may be verified. Determine if it is successfully received. If the check is passed, it indicates that the random access packet is successfully received. If the check fails, the random access packet is discarded and the random access packet is not successfully received.
  • the access point when the feedback information carried in the random access packet sent by the station is a situation including the number of attempts to access, the access point records successful access of the site that sends the random access packet. The number of times. For example, after successfully receiving the random access packet of the site, the access point marks the site with a random access success flag; or marks the site with a random access success flag and records random access. The time point of successful access is recorded, so that when the feedback information sent by the site is data within a preset time range, the access point is convenient for the access point to obtain the site in the preset time range. The number of successful accesses corresponding to all time points.
  • the station determines whether the feedback of the access point feedback is received within a preset time range. frame.
  • the station determines whether an acknowledgement frame fed back by the access point is received within a preset time range.
  • the acknowledgment frame fed back by the access point is not received within the preset time range, it indicates that the random access of the station is unsuccessful, and step S306 is performed; when it is determined that the access is received within a preset time range
  • step S307 is performed.
  • the site updates the feedback information.
  • step S302 is performed, specifically, when the trigger frame of the next broadcast of the access point is received, the steps subsequent to step S303 and step S303 are performed.
  • the station updates the feedback information, and sends data to be transmitted to the access point.
  • the station updates the number and success of the attempted access in the feedback information.
  • the number of times of access; or, updating the number of attempts to access in the feedback information; or updating the ratio of the number of successful accesses in the feedback information to the number of attempts to access; or updating the feedback information The number of times the retransmission attempts to access and the number of successful accesses; or, the number of retransmission attempts in the feedback information is updated; it can be understood that the feedback information of the site update is
  • the feedback information carried in the random access packet of the site is consistent. For example, when the feedback information is the number of attempts to access and the number of successful accesses, each of the original number of attempts to access and the number of successful accesses is incremented by one, and the access point is started. Send data to be transmitted.
  • the access point may carry information indicating that the station is allowed to perform data transmission in an acknowledgement frame, and after the station receives the acknowledgement frame, the station may start sending to the access point. Data transmitted; or the access point may be sent to a station that sends a random access packet After the frame is acknowledged, information allowing the data transmission to be performed is transmitted to the station, and after the station receives the information allowing the data transmission to be performed, the data to be transmitted is started to be transmitted to the access point.
  • the access point updates the current random access parameter according to the feedback information carried by the randomly accessed random access packet sent by the at least one station.
  • the access point updates the current random access parameter according to the feedback information carried by the random access packet sent by the successfully received one or more sites.
  • a random access packet is sent by a station when the random access resource is randomly selected according to the current random access parameter, and a random access packet carries feedback information of a site.
  • the access point may perform step S308 according to a fixed time interval; or, the access point may detect whether a random access packet sent by the successfully received station meets a preset condition, and if yes, Triggers the step of performing an update of the current random access parameters.
  • the access point sets different preset conditions according to different feedback information. For example, the access point carries the feedback information carried by the random access packet sent by the at least one station that is successfully received. The first feasible solution is: when the feedback information includes the number of attempts to access and the successful access.
  • the access point determines whether there is a site in the at least one site that attempts to access the number of times greater than the first threshold and/or determines whether the number of successful accesses in the at least one site is greater than a second threshold.
  • Site when the judgment result is yes, the access point performs a step of updating the current random access parameter, or when the determination result is no, the access point performs a step of updating the current random access parameter;
  • the two feasible solutions are: when the feedback information includes the number of attempts to access, the access point determines whether there is a site in the at least one site that attempts to access more than a first threshold and/or the Determining, by the access point, whether there is a station whose number of successful accesses is greater than a second threshold in the at least one site recorded, and when the determination result is yes, the access point performs more a step of randomly accessing a parameter, or, when the determination result is no, the access point performs a step of updating a current random access parameter; and a third feasible
  • the access point performs The step of updating the current random access parameter, or when the determination result is no, the access point performs a step of updating the current random access parameter; and the fifth feasible solution is: when the feedback information includes a retransmission attempt When the number of accesses is reached, the access point determines whether there is a station in the at least one station that has a retransmission attempt access times greater than a fourth threshold and/or the at least one site in which the access point judges the record Whether there is a station whose number of successful accesses is greater than a second threshold, when the determination result is yes, the access point performs a step of updating the current random access parameter, or when the determination result is no, the access point Performing the step of updating the current random access parameter; the sixth feasible solution is: when the feedback information includes a retransmission attempt When the number of accesses is reached, the access point determines whether there is a station in the at least one station that has a retransmission attempt access times greater than a fourth threshold and/or the at
  • the access point When the determination result is yes, the access point performs the step of updating the current random access parameter, or when the determination result is no, the access Click to perform the step of updating the current random access parameters.
  • the preset conditions set by the access point are not limited in the embodiment of the present invention.
  • the access point may assign the determined random access parameter to the current random access. Enter the parameters to implement the update of the current random access parameters.
  • the current random access parameter includes a contention window value or an access probability.
  • step S308 may include steps S401-S404. Specifically, if the random access parameter is a contention window value, the execution process of step S308.
  • the access point acquires feedback information carried by a random access packet sent by at least one station that is successfully received.
  • the access point acquires feedback information carried by the random access packet sent by one or more stations that are successfully received, to update the current random access parameter according to the feedback information.
  • the successfully received one or more sites may be sites that successfully receive random access packets within a preset time range.
  • the access point determines an average of a ratio of the number of successful accesses to the number of attempts to access.
  • the The access point determines an average value of the ratio of the number of successful accesses to the number of attempts to access according to the feedback information of the at least one site; or, when the feedback information includes the number of attempts to access, the access point Determining an average value of a ratio of the number of successful accesses to the number of attempts to access according to the recorded number of successful accesses of the at least one site and the feedback information of the at least one site; or, when the feedback information includes success
  • the access point determines an average of a ratio of the number of successful accesses to the number of attempts to access according to the feedback information of the at least one site.
  • the access point determines an average value of the ratio of the number of successful accesses to the number of attempts to access, and the number of successful accesses of each of the at least one site is summed, and then The number of attempts to access each station is summed, and finally the number of successful accesses after the sum is divided by the number of attempts to obtain the number of successful accesses and the number of attempts to access.
  • Average value another method can calculate the ratio of the number of successful accesses of each site in at least one site to the number of attempts to access through feedback information, and then according to the number of successful accesses and the number of attempts to access each site The ratio, which is the average of the ratio of the number of successful accesses to the number of attempts to access.
  • the contention window value is decreased according to the first preset ratio.
  • the access point is according to the first pre-predetermined Set the scale to reduce the current contention window value.
  • the contention window value is reduced to half of the current contention window value.
  • the contention window value is the current random access parameter in the case where the random access mode of the station is the backoff counter access mode.
  • the contention window value is increased according to a third preset ratio.
  • the access point is in accordance with a third pre- Set the scale to increase the current competition window value. For example, increase the contention window value to twice the current contention window value.
  • first threshold and the second threshold in the embodiment shown in FIG. 4a may be the same value or different values, which are not limited in the embodiment of the present invention.
  • step S308 may include step S401, step S402, step S405, and step S406. Specifically, when the random access parameter is the access probability, the execution process of step S308.
  • the steps S401 and S402 refer to the description of the corresponding steps in FIG. 4a, and details are not described herein again.
  • the access point acquires feedback information carried by a random access packet sent by at least one station that is successfully received.
  • the access point determines an average of a ratio of the number of successful accesses to the number of attempts to access.
  • the access probability is increased according to a second preset ratio.
  • the access point is according to the second pre- Set the ratio to increase the access probability. For example, increase the access probability by 0.1.
  • the access probability is a current random access parameter in a case where the random access mode of the site is a probabilistic access mode.
  • the access point is according to the fourth pre- Set the ratio to increase the current random access parameters. For example, reduce the access probability by 0.1.
  • first threshold and the second threshold in the embodiment shown in FIG. 4b may be the same value or different values, which are not limited in the embodiment of the present invention.
  • step S308 may include the following steps S407-S410.
  • the access point acquires the feedback information carried by the random access packet sent by the at least one station that is successfully received.
  • the access point acquires feedback information carried by the random access packet sent by one or more stations that are successfully received, to update the current random access parameter according to the feedback information.
  • the access point determines a ratio of the number of successful accesses of each of the at least one site to the number of attempts to access; or, when feedback information Including the number of attempts to access, the access point determines the number of successful accesses of each of the at least one site according to the recorded number of successful accesses and feedback information of at least one site. The ratio of the number of attempts to access.
  • the access point calculates the number of successful accesses of each of the at least one site and the number of attempts to access. Ratio; or, when the feedback information includes the number of attempts to access, the access point calculates each of the at least one site according to the recorded number of successful accesses of the at least one site and the feedback information The ratio of the number of successful accesses to the site and the number of attempts to access.
  • the feedback information includes the number of times of retransmission attempt access and the number of successful accesses; or the feedback information includes the number of times of retransmission attempt access
  • the number of retransmission attempts is increased by one to obtain an attempted connection. The number of entries, and then calculate the ratio of the number of successful accesses to the number of attempts to access.
  • the access point calculates the number of competing sites according to the current random access parameter and the ratio of the number of successful accesses of each of the sites to the number of attempts to access.
  • the access point calculates the number of competing sites according to the current random access parameter and the ratio of the number of successful accesses of each of the sites to the number of attempts to access. If the access point obtains feedback information of a site, the number of competing sites is calculated according to the ratio of the number of successful accesses of the site to the number of attempts to access. If the access point obtains feedback information of multiple sites, in a feasible solution, the access point may weight the ratio of the number of successful accesses of the multiple sites to the number of attempts to access On average, the ratio of the average number of successful accesses to the number of attempts to access is obtained, and the average number of competing sites corresponding to the ratio of the average number of successful accesses to the number of attempts to access is calculated.
  • the access point may calculate the ratio of the number of successful accesses of each of the multiple sites to the number of attempts to access, and calculate the number of competing sites corresponding to each site. The weighted average number of competing sites corresponding to each site is obtained, and the average number of competing sites is obtained.
  • the weighted averages involved in the above two feasible schemes may be weighted and then averaged according to the weights corresponding to the at least one station.
  • the access point sets a weight for each of the at least one site.
  • the weight may be divided according to the location of the network coverage where the site is currently located, for example, for example, For a station at the edge of the network area, the random access may fail due to the instability of the network signal. Therefore, the access point may consider setting a smaller weight to the station located at the edge of the network area. Set a larger weight for sites that are in the center of the network zone.
  • the access point may set the same weight to any one of the at least one site.
  • the access point in the embodiment of the present invention The weights set for each site are not limited.
  • the competing site number calculation rule is introduced.
  • the feasible solution described above is to calculate the ratio of the number of successful accesses of each of the multiple sites to the number of attempts to access.
  • the number of competing sites corresponding to each site is analyzed by weighting the number of competing sites corresponding to each site to obtain the average number of competing sites.
  • the random access parameter is the basis for the station to select a random access resource. It is assumed that the current random access parameter is C 1 , and one station is randomly selected from at least one site as the target site, and the number of successful accesses of the target site is determined.
  • the ratio of the number of incoming times is p 2
  • the probability that the target station selects the target resource according to the current random access parameter for C 1 is p 1 .
  • the probability that the target site selects the target resource and the other site does not select the target resource is However, at p 2 and When they are equal, they can match the current network environment, that is,
  • the current random access parameter includes a contention window value or an access probability.
  • the target station randomly generates a random number in the range [0, C 1 ), so the probability of the target station selecting the target resource
  • N STA The number of competing sites corresponding to the final destination site
  • the target station randomly generates a random number P in the range of (0, 1), since when the random number P is at (0, In the range of C 1 ), the target station may send a random access packet through a randomly accessible resource, so the probability that the target site selects the target resource is C 1 , and the number of competing sites corresponding to the target site is N STA :
  • the average number of competing sites is obtained by weighting the number of competing sites corresponding to each site.
  • the access point updates the current random access parameter according to the calculated number of the contention sites.
  • the access point updates the current random access parameter according to the calculated number of the contention sites.
  • the update method used is different for different random access parameters.
  • the current random access parameter includes a contention window value or an access probability. For example, if the current random access parameter is a contention window value, the access point updates the contention window value by using a corresponding value of the number of competing stations; if the current random access parameter is an access probability And the access point updates the access probability by using a reciprocal of a corresponding value of the number of competing stations.
  • step S409 may be performed.
  • the updated random access parameters can be used as a reference.
  • different factors can be multiplied by this reference, so that different priority services correspond to different random access parameters.
  • the access point sends the updated random access parameter to the target station.
  • the access point sends the updated random access parameter to the target station, so that the target station initiates random access according to the updated random access parameter.
  • the target site is all sites or parts of the site within the coverage of the access point network.
  • the access point may broadcast the updated random access parameters to all stations within the network coverage, so that all stations in the network coverage perform random access according to the updated random access parameters.
  • the access point may select a part of the site, and multicast the updated random access parameter to the part of the site, so that some stations perform random access according to the updated random access parameter.
  • the station receives a random access parameter sent by the access point.
  • the station receives the random access parameter sent by the access point.
  • the random access parameter is a basis for the station to select a resource that can be randomly accessed, that is, the station sends a random access to the access point by selecting a randomly accessible resource according to the random access parameter. package. It should be noted that the station is any one of the stations or part of the stations that receive the random access parameters sent by the access point.
  • the station uses the received random access parameter to select a randomly accessible resource to send a random access packet, where the random access packet carries feedback of the site. information.
  • the station uses the updated random access parameter to select a randomly accessible resource to send a random access packet.
  • the random access packet carries feedback information of the site.
  • the current random access parameter may include a contention threshold or an access probability.
  • the random access parameter is a contention threshold
  • the random access mode that the station can adopt is the backoff counter access.
  • the updated random access parameter is a contention threshold CW in the backoff counter access mode, and the station randomly generates a random number in a range of 0 to CW, and then according to the number of randomly accessible resources and/or The other condition updates the random number.
  • the station selects the target resource to send the random access packet among the randomly accessible resources.
  • the random access parameter is the access probability
  • the random access mode that the station can adopt is the probabilistic access mode
  • the updated random access parameter is the access probability in the probabilistic access mode.
  • the station randomly generates a random number between 0 and 1. When the random number is less than the access probability, the target resource is selected to send a random access packet among the randomly accessible resources.
  • the access point updates the current random access parameter by using the feedback information carried by the random access packet sent by the successfully received one or more sites, because the feedback information includes the current random connection of each site. Therefore, the random access parameters updated by the access point according to the feedback information are more closely matched with the current network environment, thereby improving the accuracy of random access parameter update, thereby improving resource utilization.
  • FIG. 5 is a schematic structural diagram of an access point according to an embodiment of the present invention.
  • the access point in the embodiment of the present invention may be an access point provided in any one of the embodiments of FIG. 2 to FIG. 4c.
  • the access point 1 in the embodiment of the present invention may include: an update unit 11 and a sending unit 12.
  • the access point 1 further includes a recording unit 13.
  • the updating unit 11 is configured to update the current random access parameter according to the feedback information carried by the randomly accessed random access packet sent by the at least one station, where a random access packet is selected by a station according to the current random access parameter.
  • a random access packet carries a feedback information of a site when the randomly accessed resource is randomly accessed.
  • the feedback information includes the number of attempts to access and the number of successful accesses; or the feedback information includes the number of attempts to access; or the feedback information includes the number of successful accesses and attempted access.
  • the recording unit 13 is configured to: when the feedback information includes the number of attempts to access, the sending unit 12 passes the random access channel when any one of the stations in the network coverage is successfully received.
  • the random access packet is sent, after the acknowledgement frame is fed back, the number of successful accesses of the site transmitting the random access packet is recorded.
  • the current random access parameter includes a contention window value or an access probability.
  • FIG. 6a is a schematic structural diagram of an update unit according to an embodiment of the present invention.
  • the update unit 11 includes a first obtaining unit 111 and a first determining unit 112. And the first update unit 113.
  • the first obtaining unit 111 is configured to obtain feedback information carried by the random access packet sent by the at least one station that is successfully received.
  • the first determining unit 112 is configured to determine, according to the feedback information of the at least one station, a ratio of the number of successful accesses to the number of attempts to access, when the feedback information includes the number of attempts to access and the number of successful accesses. Or an average of the number of successful accesses of the at least one site and the feedback information of the at least one site recorded by the recording unit 13 to determine the successful connection. And an average of the ratio of the number of times of access to the number of attempts to access; or, when the feedback information includes a ratio of the number of successful accesses to the number of attempts to access, determining that the successful connection is based on the feedback information of the at least one site The average of the ratio of the number of incoming and the number of attempts to access.
  • the first updating unit 113 is configured to: when the average value of the ratio of the number of successful accesses and the number of attempts to access is greater than the first threshold, decrease the contention window value according to the first preset ratio, or according to the first The second preset ratio increases the access probability; wherein the contention window value or the access probability is a current random access parameter.
  • the first updating unit 113 is further configured to: when the average value of the ratio of the number of successful accesses to the number of attempts to access is less than a second threshold, increase the contention window value according to a third preset ratio, Or reducing the access probability according to a fourth preset ratio.
  • FIG. 6b is a schematic structural diagram of an update unit according to an embodiment of the present invention.
  • the update unit 12 includes: a second obtaining unit 114, and a second determination. Unit 115, calculation unit 116 and second update unit 117.
  • the second obtaining unit 114 is configured to acquire a random access packet sent by at least one station that is successfully received. Feedback information carried.
  • the second determining unit 115 is configured to: when the feedback information includes the number of attempts to access and the number of successful accesses, the access point determines the number of successful accesses and attempts of each of the at least one site a ratio of the number of times of access; or, when the feedback information includes the number of attempts to access, the access point determines the at least according to the recorded number of successful accesses of the at least one site and the feedback information The ratio of the number of successful accesses to each site in a site to the number of attempts to access.
  • the calculating unit 116 is configured to calculate the number of competing sites according to the current random access parameter and the ratio of the number of successful accesses of each of the stations to the number of attempts to access.
  • the second update unit 117 is configured to update the current random access parameter according to the calculated number of the contention sites.
  • the current random access parameter includes a contention window value or an access probability.
  • the second update unit 117 is specifically configured to update the contention window value by using a corresponding value of the number of contention sites; or update the access probability by using a reciprocal of a corresponding value of the number of contention sites.
  • the sending unit 12 is configured to send, to the target station, the random access parameter after the update unit is updated, so that the target station initiates random access according to the updated random access parameter, where the target station is All or part of the sites within the coverage of the access point network.
  • the sending unit 12 is further configured to broadcast a trigger frame in a network coverage, where the trigger frame is used to indicate a random access channel that includes one or more randomly accessible resources.
  • the sending unit 12 is further configured to: when successfully receiving a random access packet sent by the random access channel by any one of the network coverage areas, the acknowledgement frame is used, and the acknowledgement frame is used to send to the sending station.
  • the station of the random access packet indicates that the random access packet is successfully received.
  • the access point shown in FIG. 5 is used to implement the content described in the corresponding embodiment of FIG. 2 to FIG. 4c of the present invention.
  • the access point shown in FIG. 5 is used to implement the content described in the corresponding embodiment of FIG. 2 to FIG. 4c of the present invention.
  • FIG. 7 is a schematic structural diagram of a site according to an embodiment of the present invention.
  • the site in the embodiment of the present invention may be the site provided in any of the embodiments of Figure 2 - Figure 4c.
  • the station 2 in the embodiment of the present invention may include: a receiving unit 21 and a sending unit 22.
  • the site 2 further includes an update unit 23.
  • the station 2 is any one of the network coverage areas of the access point.
  • the receiving unit 21 is configured to receive a random access parameter sent by the access point.
  • the sending unit 22 is configured to: when the station initiates random access, use the random access parameter received by the receiving unit 21 to select a randomly accessible resource to send a random access packet, where the random access packet Carry feedback information from the site.
  • the feedback information includes the number of attempts to access and the number of successful accesses; or the feedback information includes the number of attempts to access; or the feedback information includes the number of successful accesses and attempted access.
  • the receiving unit 21 is further configured to receive a trigger frame broadcast by the access point, where the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • the updating unit 23 is configured to update the number of times the attempted access in the feedback information is received when an acknowledgement frame fed back by the access point is not received within a preset time range; or The station updates a ratio of the number of successful accesses in the feedback information to the number of attempts to access; wherein the acknowledgement frame is used to indicate to the site that the access point successfully receives the random access Into the package.
  • the sending unit 22 is further configured to resend the random access packet carrying the updated feedback information to the access point.
  • FIG. 7 The site shown in FIG. 7 is used to implement the content of the corresponding embodiment of the present invention in FIG. 2 to FIG. 4c.
  • FIG. 7 For the content not disclosed in the embodiment shown in FIG. 7, reference may be made to the specific description of the corresponding embodiment of FIG. 2 to FIG. 4c.
  • FIG. 8 is a schematic structural diagram of another access point according to an embodiment of the present invention.
  • the access point 1 includes: at least one processor 1001, such as a CPU, at least one communication bus 1002.
  • the communication bus 1002 is used to implement connection communication between these components.
  • Input device 1003 and output device 1004 may be Ethernet interfaces.
  • the memory 1005 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the processor 1001 also performs the processes related to the access point 1 in FIGS. 2 to 4c and/or other processes for the techniques described in the present invention.
  • the memory is used to store program code and data of the access point 1.
  • Input device 1003 and output device 1004 are used to support communication between access point 1 and the station shown in Figures 2 through 4c.
  • the processor 1001 is configured to perform step S201 and step S202 in FIG. 2; or the processor 1001 is configured to perform step S301, step S304, step S308 in FIG. 3, Step S309, and also for performing some or all of the steps included in FIGS. 4a, 4b, and 4c.
  • the output device 1004 is configured to support the access point 1 to perform step S202 in FIG. 2; or the output device 1004 is configured to support the access point 1 to perform step S301, step S304 and steps in FIG. S309.
  • the input device 1003 is configured to support the step that the access point 1 performs the random access packet sent by the receiving station in step S303 in the current random access parameter in step S303, and the data to be transmitted sent in the receiving station in step S307. And the step of the random access packet sent by the receiving station through the updated random access parameter in step S311.
  • FIG. 9 is a schematic structural diagram of another station according to an embodiment of the present invention.
  • the access point includes: at least one processor 2001, such as a CPU, at least one communication bus 2002, and an input device 2003. , output device 2004, memory 2005.
  • the communication bus 2002 is used to implement connection communication between these components.
  • the memory 2006 may be a high speed RAM memory or a non-unstable memory such as at least one disk memory.
  • the processor 2001 also performs the processes involved in the site 2 of Figures 2 through 4c and/or other processes for the techniques described herein.
  • the memory is used to store program code and data for the site 2.
  • Input device 2003 and output device 2004 are used to support communication between site 2 and the access point shown in Figures 2 through 4c.
  • the processor 2001 is configured to perform steps S203 and S204 in FIG. 2; or the processor 2001 is configured to perform step S302, step S303, step S305, step S306, step S307, and steps in FIG. S310 and step S311.
  • the output device 2004 is configured to support the site 2 to perform S204 in FIG. 2; or the output device 2004 is configured to support the site 2 to perform step S303, step S307, and step S311 in FIG.
  • the input device 2003 is configured to support the station 2 to perform step S203 in FIG. 2; or the input device 2003 is configured to support the station 2 to perform step S302, step S305 and step S310 in FIG.
  • An embodiment of the present invention further provides an update system for random access parameters, where the system includes a map. 5 or the access point 1 described in FIG. 8, and the station 2 described in FIG. 7 or 9.
  • FIG. 10 is a schematic flowchart diagram of another method for updating random access parameters according to an embodiment of the present invention. As shown in FIG. 10, the method of the embodiment of the present invention may include the following steps S501-S505.
  • the station receives a trigger frame broadcast by the access point, where the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • the station receives a trigger frame broadcast by the access point.
  • the access point may periodically broadcast a trigger frame, where the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • the trigger frame is used to indicate a resource that is available for sub-channels, sub-resource blocks, or other resource formats for random access.
  • the triggering frame may be used to indicate a scheduling access channel, such as a resource that includes one or more schedulable accesses, which is not limited in this embodiment of the present invention.
  • the access point provides multiple randomly accessible resources to multiple sites in the network coverage by means of a broadcast trigger frame. Each site selects resources according to random access parameters and sends random connections through the selected resources. Into the package.
  • the site is any one of the network coverage areas of the access point.
  • the station selects a randomly accessible resource according to a current random access parameter to perform random access.
  • the station selects a randomly accessible resource according to the current random access parameter to perform random access.
  • the current random access parameter may be determined by a wireless local area network standard, that is, the station sends a random access packet to the access point by using a default random access parameter; or, the current random access parameter Is determined by the access point, that is, the station broadcasts or multicasts to any part of the network coverage before sending the random access packet to the access point.
  • Current random access parameter so that the station performs random access according to the random access parameter of the broadcast; or, the current random access parameter is obtained after the last random access parameter sent by the site to the access point is updated.
  • the access point when the access point is initially randomly accessed by the access point, the access point sends a minimum value C min of the random access parameter to the station, and the C min setting that the station will receive For the current random access parameters.
  • the random access mode that can be adopted by the site is a backoff counter access mode, where In the mode, the current random access parameter is a contention window value, and the station selects a random access resource according to the current random access parameter to perform random access.
  • the current random access parameter is a contention window value
  • the station selects a random access resource according to the current random access parameter to perform random access.
  • steps S801 to S805 are included. For details, refer to the description.
  • the station detects whether there is a generated random number.
  • the station detects whether there is a generated random number. In a feasible solution, the station detects whether a random number is generated for another random access. If yes, step S803 is performed, and if no, the step is performed. S802.
  • the station generates a random number according to the current random access parameter.
  • the station detects a random number generated does not exist, the station generates a random number according to the random access parameters updated, for example, the current set of random access parameters C 1 represents the site R. randomly generates a random number in the range of 0 to C 1
  • the station detects whether the random number satisfies a random access condition.
  • the station detects whether the random number satisfies the random access condition.
  • whether the station detects whether the random number R satisfies the random access condition may be whether the detected random number R is smaller than the randomizable included in the trigger frame.
  • the number of resources accessed N If not, step S804 is performed, and if yes, step S805 is performed.
  • step S803 may be performed after step S802, and step S803 may be performed after detecting that there is a generated random number in step S801.
  • the station updates a random number.
  • the station updates the random number R.
  • the method for updating the random number R is: the updated random number is an update. The previous random number is subtracted from the difference in the number of randomly accessible resources, and the updated random number is recorded.
  • the station waits to receive a trigger frame broadcast by the access point, that is, the station may further perform step S501; in another feasible solution, the site may Step S803 is performed to detect whether the updated random number satisfies the random access condition, and after the random access condition is satisfied, step S05 is performed.
  • the station selects a randomly accessible resource to send a random access packet.
  • the site Select a randomly accessible resource to send a random access packet.
  • the station may select a randomly accessible resource to send a random access packet according to a random number that satisfies the random access condition. For example, assume that the number N of randomly accessible resources is selected to be 8; the random number R is 20; after the step of cyclically updating the random number (RN) by using step S803 and step S804, the random access condition is satisfied The random number is 4, and the station selects the fourth random access resource included in the trigger frame to send a random access packet. In a feasible solution, the station may randomly select a randomly accessible resource to send a random access packet.
  • steps S806 to S810 are included, as described in detail below.
  • the station detects whether there is a generated random number.
  • the station detects whether there is a generated random number. In a feasible solution, the station detects whether a random number is generated for another random access. If yes, step S808 is performed, and if no, the step is performed. S807.
  • the station generates a random number according to the current random access parameter.
  • the station detects a random number generated does not exist, the station generates a random number according to the current random access parameters, for example, the current set of random access parameters C 1 represents the site 0 in the range of C 1 randomly generates a random number R.
  • the station updates a random number.
  • the station updates the random number R.
  • the method for updating the random number R is: the updated random number is a difference between the random number before the update minus the number of randomly accessible resources, and is recorded. Updated random number.
  • step S808 may be performed after step S807, and step S808 may be performed after detecting that there is a generated random number in step S801.
  • the station detects whether the random number satisfies a random access condition.
  • the station detects whether the random number satisfies the random access condition.
  • whether the station detects whether the random number R satisfies the random access condition may be whether the random number R is smaller than the number of randomly accessible resources. . If yes, step S810 is performed. If not satisfied, in a feasible solution, the station waits to receive a trigger frame broadcast by the access point, that is, the station may further perform step S501; in another feasible solution, the station may perform the step again. Step S808 updates the random number until the random access condition is met, and step S810 is performed.
  • the station selects a randomly accessible resource to send a random access packet.
  • the station selects a randomly accessible resource to send a random access packet.
  • the station may select a randomly accessible resource to send a random access packet according to a random number that satisfies the random access condition. For example, assume that the number N of randomly accessible resources is selected to be 8; the random number R is 20; after the step of cyclically updating the random number (RN) by using step S803 and step S804, the random access condition is satisfied The random number is 4, and the station selects the fourth random access resource included in the trigger frame to send a random access packet.
  • the station determines whether an acknowledgement frame fed back by the access point is received, where the acknowledgement frame is used to indicate to the station that sends the random access packet that the random access packet is successfully received.
  • the station determines whether an acknowledgement frame fed back by the access point is received, and the acknowledgement frame is used to indicate to the station that sends the random access packet that the random access packet is successfully received. If the station determines that the confirmation frame is received, step S504 is performed, and if the station determines that the determined frame is not received, step S505 is performed.
  • the station updates the current random access parameter according to the first preset manner, and records the updated random access parameter.
  • the first preset mode is a manner of reducing the current random access parameter according to the first preset ratio. If the station determines that the acknowledgement frame is received, it indicates that the station can successfully send a random access packet by using the current random access parameter, that is, the number of sites that may need to use a random access resource to send a random access packet.
  • a random access parameter set 1 represents the current written in C
  • the random access parameters with the updated C 2 represents a first predetermined
  • the method: C 2 C min , where C min is determined by the station according to the beacon frame broadcasted by the receiving access point, it should be noted that the access point periodically broadcasts the beacon frame, the beacon The frame carries the minimum value C min of the random access parameter and the maximum value C max of the random access parameter.
  • the station determines that the confirmation frame is not received, the current random access parameter is updated according to the second preset manner, and the updated random access parameter is recorded.
  • the second preset mode is a manner of increasing the current random access parameter according to the second preset ratio. If the station determines that the acknowledgement frame is received, indicating that the station does not successfully send a random access packet by using the current random access parameter, that is, the number of sites that may need to use a random access resource to send a random access packet In many cases, the random access failure occurs when the stations collide during random access. Therefore, the station increases the current random access parameters, so that multiple sites are randomly selected to randomly access resources and reduce collisions.
  • the beacon frame broadcasted by the access point is determined.
  • the access point periodically broadcasts the beacon frame, and the beacon frame carries the minimum value C min of the random access parameter and the maximum random access parameter.
  • the station may perform a trigger frame waiting for the access point to broadcast, that is, may continue to perform step S501, of course, it can be understood that the access is received.
  • the current random access parameter in step S502 has been the random access parameter updated in step S504 or step S505.
  • the station receives the trigger frame broadcasted by the access point, and selects the randomly accessible resource according to the current random access parameter to perform random access, and then receives the acknowledgement frame sent by the access point.
  • the corresponding mode is determined to update the current random access parameter, so that the station can perform the next random access by using the updated random access parameter.
  • the station can adjust the random access parameters according to whether the acknowledgement frame is received, and enhance the control capability of the station for the random access parameters, which is beneficial to improving the efficiency of random access.
  • FIG. 11 is a schematic flowchart diagram of another method for updating random access parameters according to an embodiment of the present invention. As shown in FIG. 11, the method in the embodiment of the present invention may include the following steps S601 to S607.
  • the station receives a trigger frame broadcast by the access point, where the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • the station receives a trigger frame broadcast by the access point.
  • the access point may periodically broadcast a trigger frame, where the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • the trigger frame is used to indicate a resource that is available for sub-channels, sub-resource blocks, or other resource formats for random access.
  • the triggering frame may be used to indicate a scheduling access channel, such as a resource that includes one or more schedulable accesses, which is not limited in this embodiment of the present invention.
  • the access point provides multiple randomly accessible resources to multiple sites in the network coverage by means of a broadcast trigger frame. Each site selects resources according to random access parameters and sends random connections through the selected resources. Into the package.
  • the site is any one of the network coverage areas of the access point.
  • the station determines whether the target random access parameter is carried in the trigger frame.
  • the station determines whether the target random access parameter is carried in the trigger frame.
  • the target random access parameter is determined by the access point and sent to the site through a broadcast trigger frame.
  • the station updates the current random access parameter according to the target random access parameter and the third preset manner, and selects random access according to the updated random access parameter. Resources for random access.
  • the station updates the current random access parameter according to the target random access parameter and the third preset manner, according to the update.
  • the random access parameter selects a randomly accessible resource for random access.
  • the station updates the current random access parameter according to the target random access parameter and the third preset manner, which may specifically include steps A1 to A3:
  • A1 The station determines whether the target random access parameter is a specified value, where the specified value is used to indicate that the station updates the current random access parameter according to a specified manner corresponding to the specified value.
  • the site determines that the target random access parameter is the specified value, and the third preset mode is the specified mode corresponding to the specified value, the site according to the specified value
  • the current random access parameter is updated in a corresponding specified manner.
  • said predetermined value is the access point and the station pre-specified value, for example, a random access parameter set 1 represents the current written in C, a random access using the updated parameters C 2, said predetermined value 255, corresponding to the specified value specified in accordance with the current mode is the random access parameter 1 times C 2 updates, when the station determines that the trigger frame in a random access parameter target 255, the update site
  • the subsequent random access parameter C 2 C 1 *2.
  • the third preset manner may be pre-defined by the site and the access point, that is, the site and the access point pre-designate one or more specified values, and specify The specified mode corresponding to each specified value, and the specified mode corresponding to each specified value may be different from each other, which is not limited by the embodiment of the present invention; likewise, the site and the access point are not specified by the specified value.
  • the third preset mode is the direct assignment method.
  • the solution of the step S602 and the step S603 corresponds to the scenario in which the target random access parameter is carried in the trigger frame.
  • the trigger frame may carry the target random access parameter and the third preset mode.
  • the station updates the current random access parameter according to the target random access parameter and the third preset manner in the trigger frame, specifically: the access point will carry The target random parameter and the trigger frame of the third preset mode are broadcasted, so that after receiving the trigger frame broadcast by the access point, the station updates the current random access parameter according to the target random access parameter and the third preset mode. .
  • a random access parameter update 2 represents written in C, for example, random access parameters as the target 16
  • the third embodiment is the direct assignment of the default mode, when the station When the target random access parameter in the trigger frame is 16 and the third preset mode is direct assignment, the random access parameter C 2 of the station is updated; or, for example, random access parameters as the target 255, the target 255 is a random access parameter corresponding to a third predetermined way to update the random access parameters according to the current times 1 C 2, and the target parameter is a random access time of 255
  • the third preset mode is that the site and the access point are pre-agreed, and need not be sent when the broadcast trigger frame is sent, when the site determines that the target random access parameter in the trigger frame is 255,
  • the random access parameter C 2 C 1 *2 after the site update.
  • the trigger frame may carry a third preset mode, and after performing step S601, the station updates the current random connection according to the third preset manner in the trigger frame.
  • the access point carries the trigger frame of the third preset mode for broadcast, so that after receiving the trigger frame broadcast by the access point, the site updates the current random according to the third preset mode.
  • the station selects a randomly accessible resource according to the current random access parameter to perform random access.
  • the station selects a randomly accessible resource according to the current random access parameter to perform random access.
  • the current random access parameter may be determined by a wireless local area network standard, that is, the station sends a random access packet to the access point by using a default random access parameter; or, the current random access parameter Is determined by the access point, that is, the station broadcasts or multicasts to any part of the network coverage before sending the random access packet to the access point.
  • Current random access parameter so that the station performs random access according to the random access parameter of the broadcast; or, the current random access parameter is obtained after the last random access parameter sent by the site to the access point is updated. .
  • step S603 random access is performed according to the updated random access parameter according to the updated random access parameter; or in step S604, random access resources are randomly selected according to the current random access parameter.
  • random access resources are randomly selected according to the current random access parameter.
  • FIG. 13a and FIG. 13b if random access is selected according to the updated random access parameter according to the updated random access parameter in step S603, the current random connection in FIG. 13a and FIG. 13b may be selected.
  • the parameter is changed to the updated random access parameter for execution; if the random access is selected according to the current random access parameter in step S604, the random access may be performed according to FIG. 13a and FIG. 13b.
  • FIG. 13a and FIG. 13b For the implementation process, reference may be made to the specific description in the embodiment shown in FIG. 10, and details are not described herein again.
  • step S602, step S603, and step S604 are carried in the trigger frame.
  • the flowchart of the execution of the target random access parameter may be performed according to step S602, step S603, and the carrying of the target random access parameter and the third preset manner in the trigger frame or the third preset manner in the trigger frame.
  • the manner of step S604 is performed.
  • the station determines whether an acknowledgement frame fed back by the access point is received, and the acknowledgement frame is used to indicate to the station that sends the random access packet that the random access packet is successfully received.
  • the station determines whether an acknowledgement frame fed back by the access point is received, and the acknowledgement frame is used to indicate to the station that sends the random access packet that the random access packet is successfully received. If the station determines that the confirmation frame is received, step S606 is performed, and if the station determines that the determined frame is not received, step S607 is performed.
  • step S605 After the random access is selected according to the updated random access parameter in step S603, the randomly accessible resource is selected according to the current random access parameter in step S604. After the random access is performed, step S605 can be performed.
  • the station updates the current random access parameter according to the first preset manner, and records the updated random access parameter.
  • the first preset mode is a manner of reducing the current random access parameter according to the first preset ratio. If the station determines that the acknowledgement frame is received, it indicates that the station can successfully send a random access packet by using the current random access parameter, that is, the number of sites that may need to use a random access resource to send a random access packet.
  • a random access parameter set 1 represents the current written in C
  • the random access parameters with the updated C 2 represents a first predetermined
  • the method: C 2 C min , where C min is determined by the station according to the beacon frame broadcasted by the receiving access point, it should be noted that the access point periodically broadcasts the beacon frame, the beacon The frame carries the minimum value C min of the random access parameter and the maximum value C max of the random access parameter.
  • the station determines that the confirmation frame is not received, the current random access parameter is updated according to the second preset manner, and the updated random access parameter is recorded.
  • the first preset mode is a manner of increasing the current random access parameter according to the first preset ratio. If the station determines that the acknowledgement frame is received, indicating that the station does not successfully send a random access packet by using the current random access parameter, that is, the number of sites that may need to use a random access resource to send a random access packet In many cases, the random access failure occurs when the stations collide during random access. Therefore, the station increases the current random access parameters, so that multiple sites are randomly selected to randomly access resources and reduce collisions.
  • the beacon frame broadcasted by the access point is determined.
  • the access point periodically broadcasts the beacon frame, and the beacon frame carries the minimum value C min of the random access parameter and the maximum random access parameter.
  • the station may perform a trigger frame waiting for the access point to broadcast, that is, may continue to perform step S601, of course, it can be understood that the access is received.
  • the current random access parameter in step S604 has been the random access parameter updated in step S606 or step S607.
  • the station receives the trigger frame broadcasted by the access point, determines whether the target random access parameter is carried in the trigger frame, and determines whether to update the current random access parameter, and select a randomly accessible resource at the site. After the random access is performed, whether the current random access parameter is updated in the corresponding manner is determined by whether the acknowledgement frame sent by the access point is received, so that the station can perform the next random access by using the updated random access parameter.
  • the station can update the current random access parameter according to the target random access parameter carried in the trigger frame, and adjust the random access parameter according to whether the acknowledgement frame is received, thereby enhancing the control capability of the site for the random access parameter, and
  • the random access parameters are updated according to the feedback of the access point, which is more beneficial to improve the efficiency of random access.
  • FIG. 12 another method for updating random access parameters according to an embodiment of the present invention is provided. Schematic diagram of the process. As shown in FIG. 12, the method of the embodiment of the present invention may include the following steps S701-S707.
  • the station receives a trigger frame broadcast by the access point, where the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • the station receives a trigger frame broadcast by the access point.
  • the access point may periodically broadcast a trigger frame, where the trigger frame is used to indicate a random access channel that includes one or more resources that are randomly accessible.
  • the trigger frame is used to indicate a resource that is available for sub-channels, sub-resource blocks, or other resource formats for random access.
  • the triggering frame may be used to indicate a scheduling access channel, such as a resource that includes one or more schedulable accesses, which is not limited in this embodiment of the present invention.
  • the access point provides multiple randomly accessible resources to multiple sites in the network coverage by means of a broadcast trigger frame. Each site selects resources according to random access parameters and sends random connections through the selected resources. Into the package.
  • the site is any one of the network coverage areas of the access point.
  • the station selects a randomly accessible resource according to a current random access parameter to perform random access.
  • the station selects a randomly accessible resource according to the current random access parameter to perform random access.
  • the current random access parameter may be determined by a wireless local area network standard, that is, the station sends a random access packet to the access point by using a default random access parameter; or, the current random access parameter Is determined by the access point, that is, the station broadcasts or multicasts to any part of the network coverage before sending the random access packet to the access point.
  • Current random access parameter so that the station performs random access according to the random access parameter of the broadcast; or, the current random access parameter is obtained after the last random access parameter sent by the site to the access point is updated.
  • the random access mode that can be used by the site is a backoff counter access mode.
  • the current random access parameter is a contention window value, and the site selects according to the current random access parameter.
  • the random access is performed.
  • FIG. 13a and FIG. 13b For details, refer to the detailed description in the embodiment shown in FIG. 10, and details are not described herein again.
  • the station determines whether an acknowledgement frame fed back by the access point is received, and the acknowledgement frame is used by The station that sends the random access packet indicates that the random access packet is successfully received.
  • the station determines whether an acknowledgement frame fed back by the access point is received, and the acknowledgement frame is used to indicate to the station that sends the random access packet that the random access packet is successfully received. If the station determines that the confirmation frame is received, step S704 is performed, and if the station determines that the determined frame is not received, step S705 is performed.
  • the station After receiving the determined person fed back by the access point, the station performs the updating of the current random access parameter according to the first preset manner, and records the updated random access parameter.
  • the first preset mode is a manner of reducing the current random access parameter according to the first preset ratio. If the station determines that the acknowledgement frame is received, it indicates that the station can successfully send a random access packet by using the current random access parameter, that is, the number of sites that may need to use a random access resource to send a random access packet.
  • a random access parameter set 1 represents the current written in C
  • the random access parameters with the updated C 2 represents a first predetermined
  • the method: C 2 C min , where C min is determined by the station according to the beacon frame broadcasted by the receiving access point, it should be noted that the access point periodically broadcasts the beacon frame, the beacon The frame carries the minimum value C min of the random access parameter and the maximum value C max of the random access parameter.
  • the station determines whether the target random access parameter is carried in the trigger frame.
  • the station After the station does not receive the determined person fed back by the access point, it is determined whether the target random access parameter is carried in the trigger frame.
  • the target random access parameter is determined by the access point and sent to the site through a broadcast trigger frame.
  • the station updates the current random access parameter according to the target random access parameter and the third preset manner, and selects random access according to the updated random access parameter. Resources for random access.
  • step S603 in FIG. 11 For details, refer to the detailed description of step S603 in FIG. 11 , and details are not described again.
  • the current random access parameter is updated according to a second preset manner.
  • the station updates the current random access parameter according to a second preset manner, and records the updated random access parameter.
  • the second preset mode is a manner of increasing the current random access parameter according to the second preset ratio. If the station determines that the acknowledgement frame is received, indicating that the station does not successfully send a random access packet by using the current random access parameter, that is, the number of sites that may need to use a random access resource to send a random access packet. In many cases, the random access failure occurs when the stations collide during random access. Therefore, the station increases the current random access parameters, so that multiple sites are randomly selected to randomly access resources and reduce collisions.
  • the beacon frame broadcasted by the access point is determined.
  • the access point periodically broadcasts the beacon frame, and the beacon frame carries the minimum value C min of the random access parameter and the maximum random access parameter.
  • the station may perform a trigger frame waiting for the access point to broadcast, that is, may continue to perform step S701, of course, it can be understood that, after receiving After the trigger frame broadcast by the access point, the current random access parameter in step S702 has been the random access parameter updated in step S704, S706 or step S707.
  • the station receives the trigger frame broadcasted by the access point, determines whether the target random access parameter is carried in the trigger frame, and determines whether to update the current random access parameter, and select a randomly accessible resource at the site. After the random access is performed, whether the current random access parameter is updated in the corresponding manner is determined by whether the acknowledgement frame sent by the access point is received, so that the station can perform the next random access by using the updated random access parameter.
  • the station can update the current random access parameter according to the target random access parameter carried in the trigger frame, and adjust the random access parameter according to whether the acknowledgement frame is received, thereby enhancing the control capability of the site for the random access parameter, and
  • the random access parameters are updated according to the feedback of the access point, which is more beneficial to improve the efficiency of random access.
  • the scheme of the embodiment shown in FIG. 10 to FIG. 13b can be applied to channel competition of Orthogonal Frequency Division Multiple Access (OFDMA), and one of the trigger frames is included.
  • the random access channel of the plurality of randomly accessible resources may be a band resource.
  • the station For initial uplink OFDMA random access, the station sets the current random access parameter C 1 according to the random access parameter acquired from the access point, where The random access parameter obtained from the access point may be C min , or may be a random access parameter of other values, and generate a random number R in the range of 0 to C 1 , if R is smaller than the random number indicated in the trigger frame
  • the number of incoming resources the station updates the random number R to 0, or the station updates the random number R to the random number R minus the number of randomly accessible resources indicated in the trigger frame; if the random number R is reduced to 0, and the station randomly selects a randomly accessible resource, and sends an uplink Presentation Protocol Data Unit (PPDU) on the resource.
  • PPDU uplink Presentation Protocol Data Unit
  • the station may use uplink OFDMA random access and Enhanced Distributed Channel Access (EDCA) in uplink random access.
  • Uplink OFDMA random access can receive multi-site simultaneous uplink transmission, which can enhance random access efficiency, but multiple stations must wait for the access point to send a trigger frame containing multiple randomly accessible resources before accessing.
  • the access point may send different types of frames to indicate that the station adopts OFDMA random access or indicate that the station uses EDCA channel access, for example, different types of frames are first type frames and second type frames, respectively.
  • a type of frame may include, but is not limited to, a beacon frame, a management frame, an associated frame, and the like.
  • the second type of frame includes a trigger frame, and the trigger frame may be an uplink trigger frame for providing uplink transmission resources to the station, or may be used for the site.
  • An uplink trigger frame for providing uplink OFDMA random access transmission resources.
  • the first type of frame and the second type of frame may carry the random access parameter A and the random access parameter B.
  • the random access parameter A and/or the random access parameter may be included in each type of frame. B.
  • both the random access parameter A and the random access parameter B may include a contention window (CW, that is, a random access parameter involved in FIG. 10 to FIG. 13b) and/or an arbitration interframe space (AIFSN).
  • the access point can set the CW to a specified value to indicate that the execution site is disabled and the EDCA channel access function is disabled.
  • the access point can also set the AIFSN to a specified value to indicate that the site disables and disables the EDCA channel access function.
  • the manner in which the station disables and disables the EDCA channel access function includes, but is not limited to, suspending EDCA backoff, keeping the backoff count value unchanged, or turning off the backoff counter.
  • the value of the parameter in the random access parameter B is smaller than the value of the parameter in the random access parameter A.
  • the window size n is a protocol pre-agreed.
  • the CW field is a specific CWs, the EDCA channel access mode is disabled or disabled.
  • the CW field is CWs, it is called the window size infinity.
  • the AIFSN field is AIFSNn (n, s is the target, n is not equal to s), indicating the number of interval slots n; the number of interval slots n is a protocol pre-agreed.
  • AIFSN field is AIFSNs, it means that the EDCA channel access mode is disabled or disabled.
  • AIFSN field is AIFSNs, the number of interval slots is infinite.
  • the CW field bit sequence when the CW field bit sequence is 0001, it indicates 15; when the CW value is 0010, it indicates 31; when the CW value is 1110, it indicates 16383; when the CW value is 1111, it indicates that the EDCA channel access mode is disabled or disabled. , or the number of interval slots is infinite.
  • other agreed values may also be used.
  • other bit sequence lengths and mapping relationships may be adopted. For example the following table:
  • the CW field can also be represented in other mapping forms, such as the following table:
  • the AIFSN field bit sequence is 0001, it indicates 1; when the AIFSN value is 0010, Indicates 2; when the AIFSN value is 1110, it indicates 14; when the AIFSN value is 1111, it means that the EDCA channel access mode is disabled or closed, or the number of interval slots is infinite.
  • the access point can indicate the random access parameters used by the site.
  • the access point may indicate random access parameters for the designated data queue of the station.
  • the above CW can be refined into CWmin and CWmax.
  • the site uses CWmin as the CW default (initial) setting.
  • the CW is updated to the output value of the current CW after a preset operation.
  • the preset operation can be an input value multiplied by a predetermined constant. Or add a predetermined constant or a specified number.
  • the output value after the preset operation is greater than CWmax, the CW is updated to CWmax.
  • the access point may also include the random access parameter B.
  • the random access parameter B is used for a station that does not have the OFDMA random access function, and the random access parameter A is only used for the site of the OFDMA random access function.
  • the OFDMA random access function may also refer to a multi-user (MU) transmission capability, specifically, the capability of the device to report to the access point, or whether the device actually supports the MU transmission capability.
  • MU multi-user
  • random access parameter B is used for stations that do not participate in MU transmission, and random access parameter A is only used for stations participating in MU transmission capability.
  • the station After the site receives the random access parameter A, if the CW value is CWs, the station suspends the EDCA backoff and keeps the backoff count value unchanged. If the CW value is not CWs, the station sets CW to the CW value. If the CWmin value is not CWmins, the station sets CWmin to the CWmin value.
  • the station After the site receives the random access parameter A, if the CW value is CWs, the station suspends the EDCA backoff and keeps the backoff count value unchanged. Or use competition-based access periods.
  • the access point (AP) in (1) of FIG. 14 transmits a first type of frame
  • the station (STA) uses the first type of frame after receiving the indication of the first type of frame.
  • the indicated parameters are channel accessed.
  • the station uses the parameters in the random access parameter A for EDCA access.
  • the station after receiving the second type of frame, the station performs EDCA access using the parameters in the random access parameter A.
  • the second type of frame specifies a frame for a protocol, such as a management frame, a control frame, or a data frame.
  • the second type of frame can be an uplink trigger frame.
  • the second type of frame may be an uplink trigger frame that provides the uplink transmission resource to the station.
  • the second type of frame may be an uplink trigger frame that provides the uplink OFDMA random access transmission resource to the station.
  • the station uses the parameters in the random access parameter A after receiving the second type of frame.
  • Perform EDCA access The second type of frame specifies a frame for a protocol, such as a management frame, a control frame, or a data frame.
  • the second type of frame can be an uplink trigger frame.
  • the second type of frame may be an uplink trigger frame that provides the uplink transmission resource to the station.
  • the second type of frame may be an uplink trigger frame that provides the uplink OFDMA random access transmission resource to the station.
  • the station Before receiving the second type of frame, the station can use the parameters in the random access parameter B for EDCA access.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Abstract

一种随机接入参数的更新方法及相关设备，其中方法包括如下步骤：接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，其中，一个随机接入包是由一个站点按照当前随机接入参数选择可随机接入的资源进行随机接入时所发送的，一个随机接入包携带一个站点的反馈信息；接入点向目标站点发送更新后的随机接入参数，以使目标站点按照更新后的随机接入参数发起随机接入，其中，目标站点为接入点网络覆盖范围内的全部站点或部分站点。采用本发明，能够根据随机接入包的反馈信息更新随机接入参数，使得随机接入参数与当前的网络环境更加匹配。

Description

一种随机接入参数的更新方法及相关设备
本申请要求于2015年12月18日提交中国专利局，申请号为201510955741.X、发明名称为“一种随机接入参数的更新方法及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本申请要求于2016年6月22日提交中国专利局，申请号为201610460511.0、发明名称为“一种随机接入参数的更新方法及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种随机接入参数的更新方法及相关设备。
背景技术
用户设备与网络侧设备之间进行数据传输之前，需要发起随机接入过程。对于随机接入过程，网络侧设备会向多个用户设备提供多个可随机接入的资源，各个用户设备利用随机接入参数随机选择资源进行接入，具体是在由随机接入参数确定的范围内生成随机数，根据随机数选择资源进行接入。如果用户设备收到网络侧设备发送的确认帧，表示用户设备随机接入成功，进而可传输数据。然而，由于用户设备是从多个可随机接入的资源中随机选择资源的，因此会存在两个或者多个用户设备选择同一个资源的情况，这样就会发生随机接入冲突，造成随机接入失败。
如果用户设备没有收到站点发送的确认帧，则认为用户设备随机接入失败，在随机接入失败的情况下，现有技术采用增加常数或者乘以系数的方式扩大随机接入参数，用户设备根据扩大了的随机接入参数再次选择资源进行接入。但是在可随机接入的资源的数量一定的情况下，与资源对应的可随机接入值是有限的，通过扩大随机接入参数，可以减小用户设备竞争程度，但当随机接入参数过大时，用户设备成功选择资源的概率减小，造成资源空闲增多，使得资源浪费，降低了随机接入效率。
发明内容
本发明实施例提供一种随机接入参数的更新方法及相关设备，能够根据随机接入包的反馈信息更新随机接入参数，使得随机接入参数与当前的网络环境更加匹配。
本发明实施例第一方面提供了一种随机接入参数的更新方法，包括：接入点根据成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，并在网络覆盖范围内的全部站点或部分站点发送更新后的随机接入参数，以使全部站点或部分站点按照更新后的随机接入参数进行随机接入。其中，一个随机接入包是由一个站点发送的，并且站点是按照当前随机接入参数选择可随机接入的资源发送的随机接入包。接入点通过一个或者多个站点的反馈信息获知当前的关于随机接入的网络环境状况，进而可更新随机接入参数以更加能与当前的网络环境相匹配，提高了随机接入参数更新的准确性。
在第一方面的一种可能实现方式中，接入点获取随机接入成功的一个或多个站点发送的随机接入包之前，还包括：接入点广播用于指示包含一个或者多个可随机接入的资源的随机接入信道，在任意一个站点接收到触发帧之后，该站点可通过可随机接入的资源发送随机接入包。
当接收到任意一个站点发送的随机接入包时，接入点向发送随机接入包的站点反馈用于指示成功接收所述随机接入包的确认帧，相应地，若站点接收到确认帧，表示该站点可以开始传输待传输数据。
在第一方面的一种可能实现方式中，反馈信息用于表示站点当前的随机接入的情况，例如，包括尝试接入的次数和成功接入的次数；或者，包括尝试接入的次数；或者，包括重传尝试接入的次数和成功接入的次数；或者，包括重传尝试接入的次数；或者，成功接入的次数与尝试接入的次数的比值，进而可根据成功接入的次数与尝试接入的次数的比值获得当前的随机接入成功概率，便于让接入点获知当前的网络环境，进而确定与当前网络环境相匹配的随机接入参数。其中，当所述反馈信息包括尝试接入的次数时，所述接入点记录发送所述随机接入包的站点的成功接入的次数，以计算成功接入的次数与尝试接入的次数的比值。
在第一方面的一种可能实现方式中，接入点根据成功接收的一个或多个站点发送的随机接入包所携带的反馈信息更新当前随机接入参数时具体执行：接入点获取成功接收的一个或多个站点发送的随机接入包所携带的反馈信息，当反馈信息包括尝试接入的次数和成功接入的次数时，或者，当反馈信息包括尝试接入的次数时；或者，当所述反馈信息包括成功接入的次数与尝试接入的次数的比值时，确定成功接入的次数与尝试接入的次数的比值的平均值，进而根据确定的成功接入的次数与尝试接入的次数的比值的平均值更新当前随机接入参数。当前随机接入参数可以包括竞争窗值或接入概率，对于不同的随机接入参数采用不同的更新方式，例如，当成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，接入点按照第一预设比例减小竞争窗值；当成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，接入点按照第三预设比例增大竞争窗值；或者，当成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，接入点按照第二预设比例增大接入概率；当成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，接入点按照第四预设比例减小接入概率。通过成功接入的次数与尝试接入的次数的比值的平均值反应站点当前所处的网络环境，进而获得与网络环境更加匹配的随机接入参数。
在第一方面的一种可能实现方式中，接入点根据成功接收的一个或多个站点发送的随机接入包所携带的反馈信息更新当前随机接入参数时具体执行：接入点获取成功接收的一个或多个站点发送的随机接入包所携带的反馈信息，当反馈信息包括尝试接入的次数和成功接入的次数时，或者，当反馈信息包括尝试接入的次数时，确定每一个站点的成功接入的次数与尝试接入的次数的比值；接入点根据当前随机接入参数和每一个站点的成功接入的次数与尝试接入的次数的比值，计算竞争站点数量，并根据计算的竞争站点数量，更新当前随机接入参数，由于反馈信息包括各个站点的当前的随机接入情况，这样根据反馈信息更新的随机接入参数能够与当前的网络环境更加匹配。
而接入点根据计算的竞争站点数量，更新当前随机接入参数，当前随机接入参数可以包括竞争窗值或接入概率，对于不同的随机接入参数，所采用的更新方式不同。例如，若当前随机接入参数为竞争窗值，接入点采用所述竞争站 点数量的对应数值更新所述竞争窗值。又如若当前随机接入参数为接入概率时，接入点采用所述竞争站点数量的对应数值的倒数更新所述接入概率。
本发明实施例第二方面提供了另一种随机接入参数的更新方法，包括：站点接收接入点发送的随机接入参数，当站点发起随机接入时，站点采用接收到的随机接入参数选择可随机接入的资源发送携带站点的反馈信息随机接入包。通过发送携带反馈信息的随机接入包，便于在接入点成功接收到随机接入包之后获知站点当前的随机接入的情况以及网络环境状况，以使接入点进一步更新当前随机接入参数。
在第二方面的一种可能实现方式中，站点接收接入点广播的随机接入参数之前，还包括：站点接收接入点广播的触发帧，触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
在第二方面的一种可能实现方式中，反馈信息用于表示站点当前的随机接入的情况，例如，包括尝试接入的次数和成功接入的次数；或者，包括尝试接入的次数；或者，包括重传尝试接入的次数和成功接入的次数；或者，包括重传尝试接入的次数；或者，成功接入的次数与尝试接入的次数的比值，进而可根据成功接入的次数与尝试接入的次数的比值获得当前的随机接入成功概率，便于让接入点获知当前的网络环境，进而确定与当前网络环境相匹配的随机接入参数。
在第二方面的一种可能实现方式中，当站点发起随机接入时，站点采用接收到的随机接参数值选择可随机接入的资源发送随机接入包之后，还执行步骤：当在预设时间范围内未接收到接入点反馈的指示接入点成功接收随机接入包的确认帧时，站点更新反馈信息，并向接入点重新发送携带更新后的反馈信息的随机接入包。
本发明实施例第三方面提供了一种接入点，该接入点具有实现第一方面提供的随机接入参数的更新方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或者多个与第一方面提供的随机接入参数的更新方法的功能对应的单元。
在一个可能的设计中，接入点的结构中包括处理器、输入设备和输出设备，所述处理器为接入点执行第一方面中相应的功能。输入设备和输出设备用于支 持接入点和站点之间的通信，输出设备向站点发送第一方面中所涉及的信息或指令，输入设备接收第一方面中所涉及的站点发送的信息或指令。所述接入点还包括存储器，所述存储器用于与处理器耦合，其保存接入点必要的程序指令和数据。
本发明实施例第四方面提供了一种计算机存储介质，该计算机存储介质存储有计算机程序，当计算机存储介质中的计算机程序被读取到计算机时，能够使得计算机完成第一方面提供的随机接入参数的更新方法的全部步骤。
本发明实施例第五方面提供了一种站点，该站点具有实现第二方面所提供的随机接入参数的更新方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或者多个与第二方面提供的随机接入参数的更新方法的功能对应的单元。
在一个可能的设计中，站点的结构中包括处理器、输入设备和输出设备，所述处理器为站点执行第二方面中相应的功能。输入设备和输出设备用于支持站点和接入点之间的通信，输出设备向接入点发送第二方面中所涉及的信息或指令，输入设备接收第二方面中所涉及的接入点发送的信息或指令。所述站点还包括存储器，所述存储器用于与处理器耦合，其保存站点必要的程序指令和数据。
本发明实施例第六方面提供了另一种计算机存储介质，该计算机存储介质存储有计算机程序，当计算机存储介质中的计算机程序被读取到计算机时，能够使得计算机完成第二方面提供的随机接入参数的更新方法的全部步骤。
在本发明实施例中，接入点通过根据成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，由于反馈信息包括各个站点的当前的随机接入情况，因此接入点根据反馈信息更新的随机接入参数与当前的网络环境更加匹配，提高了随机接入参数更新的准确性，进而提高资源的利用率。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些 实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是一种网络架构图示意图；
图2是本发明实施例提供的一种随机接入参数的更新方法的流程示意图；
图3是本发明实施例提供的另一种随机接入参数的更新方法的流程示意图；
图4a是本发明实施例提供的步骤S308的一种流程示意图；
图4b是本发明实施例提供的步骤S308的一种流程示意图；
图4c是本发明实施例提供的步骤S308的另一种流程示意图；
图5是本发明实施例提供的一种接入点的结构示意图；
图6a是本发明实施例提供的更新单元的一种结构示意图；
图6b是本发明实施例提供的更新单元的另一种结构示意图；
图7是本发明实施例提供的一种站点的结构示意图；
图8是本发明实施例提供的另一种接入点的结构示意图；
图9是本发明实施例提供的另一种站点的结构示意图；
图10是本发明实施例提供的另一种随机接入参数的更新方法的流程示意图；
图11是本发明实施例提供的另一种随机接入参数的更新方法的流程示意图；
图12是本发明实施例提供的另一种随机接入参数的更新方法的流程示意图；
图13a是本发明实施例提供的图10中步骤S502的一种流程示意图；
图13b是本发明实施例提供的图10中步骤S502的另一种流程示意图；
图14是本发明实施例提供的一种随机接入的示例图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有付出创造 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。
需要说明的是，在本发明实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本发明。在本发明实施例和所附权利要求书中所使用的单数形式的一种、所述和该也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语和/或是指并包含一个或多个相关联的列出项目的任何或所有可能组合。另外，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、第三和第四等是用于区别不同对象，而不是用于描述特定顺序。此外，术语包括和具有以及它们任何变形，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、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
为了更好理解本发明实施例公开的一种随机接入参数的更新方法，下面先对本发明实施例适用的网络构架进行描述。请参阅图1，为本发明实施例公开的一种网络构架示意图。在图1所示的网络构架中，可以包括接入点和多个站点，例如，站点1、站点2、站点3、……、站点N。本发明实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)等。
在本发明实施例中，站点(Station，STA)可以包括但不限定于终端(Terminal)、移动终端(Mobile Terminal)等，该站点可以经无线接入网与一个或多个核心网进行通信，例如，站点可以是移动手机、平板电脑、个人数字助理(Personal Digital Assistant,PDA)、移动互联网设备(Mobile Internet Device，MID)、智能穿戴设备(如智能手表、智能手环)等各类的终端设备，它们与无线接入网交换数据。
在本发明实施例中，接入点可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)，还可 以是LTE中的演进型基站(Evolutional Node B，E-NodeB)，本发明实施例不做限定。
在图1所示的网络构架中，接入点根据成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，其中，一个随机接入包是由一个站点按照当前随机接入参数选择可随机接入的资源进行随机接入时所发送的，一个随机接入包携带一个站点的反馈信息，接入点向网络覆盖范围内的全部站点或部分站点发送更新后的随机接入参数，以使全部站点或部分站点按照更新后的随机接入参数发起随机接入。由于反馈信息包括各个站点的当前的随机接入情况，因此接入点根据反馈信息更新的随机接入参数与当前的网络环境更加匹配，提高了随机接入参数更新的准确性，进而提高资源的利用率。
基于图1所示的网络构架，请参见图2，为本发明实施例提供了一种随机接入参数的更新方法的流程示意图。如图2所示，本发明实施例的所述方法可以包括以下步骤S201-步骤S204。
S201，接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数。
具体的，站点与接入点之间进行数据传输之前，需要发起随机接入过程。对于随机接入过程，接入点会向网络覆盖范围内的多个站点提供多个可随机接入的资源，每一个站点按照当前随机接入参数选择资源，并通过所选择的资源发送随机接入包。如果站点收到接入点发送的确认帧，表示随机接入成功。如果站点没有收到接入点发送的确认帧，则认为随机接入失败，站点需要再次按照当前随机接入参数选择资源发送随机接入包。接入点根据成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数。其中，成功接收的随机接入包是指接入点接收到随机接入包之后对其有效性进行验证，可选的，可以通过对随机接入包中的校验位或循环冗余校验码(Cyclic Redundancy Check，CRC)字段进行校验判断是否成功接收。若校验通过，则表示成功接收随机接入包，若校验不通过，则丢弃随机接入包且表示未成功接收随机接入包。一个随机接入包是由一个站点按照当前随机接入参数选择可随机接入的资源进行随机接入时所发送的，一个随机接入包携带一个站点的反馈 信息。需要说明的是，在可行的方案中，当所述接入点根据反馈信息确定的随机接入参数与当前随机接入参数相同时，所述接入点可以将确定的随机接入参数赋值给当前随机接入参数，进而实现对当前随机接入参数的更新。
可选的，所述随机接入点可以根据一个或者多个站点的随机接入包的反馈信息，确定当前的可随机接入资源的竞争程度，进而计算较为准确的随机接入参数，并采用计算得到的随机接入参数更新当前随机接入参数。例如，随机接入包的反馈信息包括站点一次随机接入的尝试接入次数，所述接入点在网络覆盖范围内广播了包含16个可随机接入的资源时，若所述接入点接收到3个站点发送的随机接入包，且每一个站点的随机接入包的反馈信息表示随机接入的尝试接入次数高于预设阈值时，表示站点不容易随机接入成功，但是所提供的资源的数量是能够满足站点的需求，因此所述随机接入参数的设定不符合当前的网络环境，因此接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，以提高站点随机接入的成功率，进而提高站点对资源的利用率。
需要说明的是，所述当前随机接入参数可以是由无线局域网标准确定，即，所述站点采用默认的随机接入参数向所述接入点发送随机接入包；或者，所述当前随机接入参数是由所述接入点确定的，即，所述站点在向所述接入点发送随机接入包之前，所述接入点向网络覆盖范围内的任一站点广播或者向部分站点组播当前随机接入参数，以使所述站点根据广播的随机接入参数进行随机接入。
可选的，一个站点的反馈信息包括该站点尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值；或者，所述反馈信息包括重传尝试接入的次数和成功接入的次数；或者，所述反馈信息包括重传尝试接入的次数，其中，重传尝试接入的次数在数值上比尝试接入的次数少1。
S202，所述接入点向目标站点发送更新后的随机接入参数。
具体的，所述接入点向目标站点发送更新后的随机接入参数，以使所述目标站点按照所述更新后的随机接入参数发起随机接入。其中，所述目标站点为所述接入点网络覆盖范围内的全部站点或部分站点。
举例来说，所述接入点可以在网络覆盖范围内向全部站点广播更新后的随机接入参数，以使网络覆盖范围内的全部站点按照所述更新后的随机接入参数进行随机接入。又举例来说，所述接入点可以选取部分站点，向部分站点组播更新后的随机接入参数，以使部分站点按照所述更新后的随机接入参数进行随机接入。
S203，站点接收接入点发送的随机接入参数。
具体的，站点接收所述接入点发送的随机接入参数。所述随机接入参数是所述站点选择可随机接入的资源的依据，即所述站点通过按照所述随机接入参数选择可随机接入的资源，向所述接入点发送随机接入包。需要说明的是，所述站点是接收所述接入点发送的随机接入参数的全部站点或者部分站点中的任意一个站点。
S204，当所述站点发起随机接入时，所述站点采用接收到的所述随机接入参数选择可随机接入的资源发送随机接入包，所述随机接入包携带所述站点的反馈信息。
具体的，当所述站点发起随机接入时，所述站点采用更新后的随机接入参数选择可随机接入的资源发送随机接入包。所述随机接入包携带所述站点的反馈信息。可选的，所述反馈信息包括该站点尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值；或者，所述反馈信息包括重传尝试接入的次数和成功接入的次数；或者，所述反馈信息包括重传尝试接入的次数，其中，重传尝试接入的次数在数值上比尝试接入的次数少1。
可选的，当前随机接入参数可以包括竞争窗值或接入概率，举例来说，若随机接入参数为竞争窗值，相应地所述站点可以采用的随机接入方式为退避计数器接入方式，更新后的随机接入参数为退避计数器接入方式中的竞争窗值CW，所述站点在0到CW的范围内随机生成随机数，然后根据可随机接入资源的个数和/或其他条件更新随机数，当随机数更新为小于或等于0的值时，所述站点在可随机接入的资源中选择目标资源发送随机接入包。又举例来说，若随机接入参数为接入概率，相应地所述站点可以采用的随机接入方式为概率接入方式，更新后的随机接入参数为概率接入方式中的接入概率，所述站点在 0到1之间随机生成随机数，当所述随机数小于接入概率时，在可随机接入的资源中选择目标资源发送随机接入包。
在本发明实施例中，接入点通过根据成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，由于反馈信息包括各个站点的当前的随机接入情况，因此接入点根据反馈信息更新的随机接入参数与当前的网络环境更加匹配，提高了随机接入参数更新的准确性，进而提高资源的利用率。
基于图1所示的网络构架，请参见图3，为本发明实施例提供了另一种随机接入参数的更新方法的流程示意图。如图3所示，本发明实施例的所述方法可以包括以下步骤S301-步骤S311。
S301，接入点在网络覆盖范围内广播触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
具体的，站点与接入点之间进行数据传输之前，需要发起随机接入过程。对于随机接入过程，接入点会向网络覆盖范围内的多个站点提供多个可随机接入的资源，每一个站点按照当前随机接入参数选择资源，并通过所选择的资源发送随机接入包。如果站点收到接入点发送的确认帧，表示随机接入成功。如果站点没有收到站点发送的确认帧，则认为随机接入失败，站点需要再次按照当前随机接入参数选择资源发送随机接入包。
所述接入点在网络覆盖范围内广播触发帧。所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。例如，所述触发帧用于指示可用于随机接入的子信道、子资源块或者其他资源格式的资源。可选的，所述触发帧还可以用于指示包含一个或者多个可调度接入的资源的调度接入信道等，本发明实施例对此不做限定。
S302，站点接收接入点广播的触发帧。
具体的，所述站点接收接入点广播的触发帧，所述站点可在发起随机接入时，根据当前随机接入参数选择资源并通过所述资源发送随机接入包。
需要说明的是，所述站点是所述接入点的网络覆盖范围内的任意一个站点。所述当前随机接入参数可以是由无线局域网标准确定，即，所述站点采用默认的随机接入参数向所述接入点发送随机接入包；或者，所述当前随机接入 参数是由所述接入点确定的，即，所述站点在向所述接入点发送随机接入包之前，所述接入点向网络覆盖范围内的任一站点广播或者向部分站点组播当前随机接入参数，以使所述站点根据广播的随机接入参数进行随机接入。
S303，所述站点按照当前随机接入参数选择可随机接入的资源发送携带反馈信息随机接入包。
具体的，所述站点通过所述随机接入信道发送随机接入包，所述随机接入包携带反馈信息。所述反馈信息是用于反馈所述站点按照当前随机接入参数进行随机接入的情况，可选的，所述反馈信息包括该站点尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值；或者，所述反馈信息包括重传尝试接入的次数和成功接入的次数；或者，所述反馈信息包括重传尝试接入的次数，其中，重传尝试接入的次数在数值上比尝试接入的次数少1。
可选的，当前随机接入参数可以包括竞争窗值或接入概率，举例来说，若随机接入参数为竞争窗值，相应地所述站点可以采用的随机接入方式为退避计数器接入方式，当前随机接入参数为退避计数器接入方式中的竞争窗值CW，所述站点在0到CW的范围内随机生成随机数，然后根据可随机接入资源的个数和/或其他条件更新随机数，当随机数更新为小于或等于0的值时，所述站点在可随机接入的资源中选择目标资源发送随机接入包。又举例来说，若随机接入参数为接入概率，相应地所述站点可以采用的随机接入方式为概率接入方式，当前随机接入参数为概率接入方式中的接入概率，所述站点在0到1之间随机生成随机数，当所述随机数小于接入概率时，在可随机接入的资源中选择目标资源发送随机接入包。
需要说明的是，所述反馈信息可以包括所述站点发起此次随机接入之后的尝试接入的次数和成功接入的次数；或者，所述反馈信息包括所述站点发起此次随机接入之后的尝试接入的次数；或者，所述反馈信息包括所述站点发起此次随机接入之后的重传尝试接入的次数和成功接入的次数；或者，所述反馈信息包括所述站点发起此次随机接入之后的重传尝试接入的次数；或者，所述反馈信息包括所述站点在预设时间范围内的尝试接入的次数和成功接入的次数；或者，所述反馈信息包括所述站点在预设时间范围内的尝试接入的次数；或者， 所述反馈信息包括所述站点在预设时间范围内的重传尝试接入的次数和成功接入的次数；或者，所述反馈信息包括所述站点在预设时间范围内的重传尝试接入的次数。可选的，预设时间范围可以是包括所述站点当前所在的第一时刻和早于第一时刻固定间隔的第二时刻之间的范围。
举例来说，若所述反馈信息采用尝试接入的次数和成功接入的次数时，所述站点可直接发送尝试接入的次数和成功接入的次数，即，当所述站点是第N次发送所述随机接入包、成功接入的次数为M时，则发送尝试接入的次数为N、成功接入的次数为M，其中，成功接入的次数的初始值为0，每一次随机接入成功之后均在成功接入的次数上增加1进而获得成功接入的次数；或者采用修正后的尝试接入的次数和成功接入的次数，比如，所述站点可在预先约定的区间来量化上述次数和数值，用一个或多个bit来表示数值属于其中的一个区间，相应地，接入点可通过站点反馈的bit来恢复或估计站点反馈的数值。
S304，当成功接收到所述网络覆盖范围内任意一个站点通过所述随机接入信道发送的随机接入包时，所述接入点反馈确认帧。
具体的，当成功接收到所述网络覆盖范围内任意一个站点通过所述随机接入信道发送的随机接入包时，所述接入点反馈确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。其中，成功接收的随机接入包是指接入点接收到随机接入包之后对其有效性进行验证，可选的，可以通过对随机接入包中的校验位或CRC字段进行校验判断是否成功接收。若校验通过，则表示成功接收随机接入包，若校验不通过，则丢弃随机接入包且表示未成功接收随机接入包。
可选的，当所述站点发送的随机接入包中所携带的反馈信息是包括尝试接入的次数的情况时，所述接入点记录发送所述随机接入包的站点的成功接入的次数。举例来说，所述接入点在成功接收到该站点的随机接入包之后，对该站点标记随机接入成功的标志；或者，对该站点标记随机接入成功的标志并且记录随机接入成功的时间点，通过记录随机接入成功的时间点，这样当所述站点发送的反馈信息是预设时间范围内的数据时，便于所述接入点获取该站点在所述预设时间范围的全部时间点对应的成功接入的次数。
S305，所述站点判断在预设时间范围内是否接收到所述接入点反馈的确认 帧。
具体的，所述站点判断在预设时间范围内是否接收到所述接入点反馈的确认帧。当在预设时间范围内未接收到所述接入点反馈的确认帧时，则表示所述站点随机接入不成功，执行步骤S306；当判断在预设时间范围内接收到所述接入点反馈的确认帧时，则表示所述站点随机接入成功，执行步骤S307。
S306，若否，所述站点更新所述反馈信息。
具体的，当在预设时间范围内未接收到所述接入点反馈的确认帧时，表示随机接入不成功，所述站点更新所述反馈信息中的所述尝试接入的次数；或者，更新所述反馈信息中的重传尝试接入的次数；或者，更新所述反馈信息中的成功接入的次数与尝试接入的次数的比值，可以理解的是，所述站点更新的反馈信息与所述站点随机接入包中携带的反馈信息保持一致。例如，当所述反馈信息是尝试接入的次数和成功接入的次数时，当在预设时间范围内未接收到所述接入点反馈的确认帧时，在原有的尝试接入的次数的基础上加1。并在反馈信息更新之后执行步骤S302，具体是用于当接收到接入点下一次广播的触发帧时，执行步骤S303和步骤S303之后的步骤。
S307，若是，所述站点更新所述反馈信息，并向所述接入点发送待传输数据。
具体的，当在预设时间范围内接收到所述接入点反馈的所述确认帧时，表示随机接入成功，所述站点更新所述反馈信息中的所述尝试接入的次数和成功接入的次数；或者，更新所述反馈信息中的尝试接入的次数；或者，更新所述反馈信息中的成功接入的次数与尝试接入的次数的比值；或者，更新所述反馈信息中的所述重传尝试接入的次数和成功接入的次数；或者，更新所述反馈信息中的重传尝试接入的次数；可以理解的是，所述站点更新的反馈信息与所述站点随机接入包中携带的反馈信息保持一致。例如，当所述反馈信息是尝试接入的次数和成功接入的次数时，在原有的尝试接入的次数和成功接入的次数的基础上各加1，并开始向所述接入点发送待传输数据。
需要说明的是，所述接入点可以在确认帧中携带指示所述站点允许执行数据传输的信息，当所述站点接收到所述确认帧之后，所述站点可以开始向接入点发送待传输的数据；或者，所述接入点可以在向发送随机接入包的站点发送 确认帧之后，向所述站点发送允许执行数据传输的信息，在站点接收到允许执行数据传输的信息之后，开始向接入点发送待传输的数据。
S308，接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数。
具体的，接入点根据成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数。其中，一个随机接入包是由一个站点按照当前随机接入参数选择可随机接入的资源进行随机接入时所发送的，一个随机接入包携带一个站点的反馈信息。
需要说明的是，所述接入点可以按照固定时间间隔执行步骤S308；或者，所述接入点可通过检测成功接收的站点所发送的随机接入包是否满足预设条件，若满足，则触发执行更新当前随机接入参数的步骤。可以理解的是，所述接入点根据不同反馈信息设定不同的预设条件。举例来说，接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，第一种可行的方案是，当所述反馈信息包括尝试接入的次数和成功接入的次数时，所述接入点判断所述至少一个站点中是否存在尝试接入的次数大于第一阈值的站点和/或判断所述至少一个站点中是否存在成功接入的次数是否大于第二阈值的站点，当判断结果为是时，所述接入点执行更新当前随机接入参数的步骤，或者，当判断结果为否时，所述接入点执行更新当前随机接入参数的步骤；第二种可行的方案是，当所述反馈信息包括尝试接入的次数时，所述接入点判断所述至少一个站点中是否存在尝试接入的次数大于第一阈值的站点和/或所述接入点判断记录的所述至少一个站点中是否存在成功接入的次数大于第二阈值的站点，当判断结果为是时，所述接入点执行更新当前随机接入参数的步骤，或者，当判断结果为否时，所述接入点执行更新当前随机接入参数的步骤；第三种可行的方案是，当所述反馈信息包括成功接入的次数与尝试接入的次数的比值时，所述接入点判断所述至少一个站点中是否存在成功接入的次数与尝试接入的次数的比值小于第三阈值的站点，当判断结果为是时，所述接入点执行更新当前随机接入参数的步骤，或者，当判断结果为否时，所述接入点执行更新当前随机接入参数的步骤；第四种可行的方案是，当所述反馈信息包括重传尝试接入的次数和成功接入的次数时，所述接入点判断所述至少一个站点中是否存在重 传尝试接入的次数大于第四阈值的站点和/或判断所述至少一个站点中是否存在成功接入的次数是否大于第二阈值的站点，当判断结果为是时，所述接入点执行更新当前随机接入参数的步骤，或者，当判断结果为否时，所述接入点执行更新当前随机接入参数的步骤；第五种可行的方案是，当所述反馈信息包括重传尝试接入的次数时，所述接入点判断所述至少一个站点中是否存在重传尝试接入的次数大于第四阈值的站点和/或所述接入点判断记录的所述至少一个站点中是否存在成功接入的次数大于第二阈值的站点，当判断结果为是时，所述接入点执行更新当前随机接入参数的步骤，或者，当判断结果为否时，所述接入点执行更新当前随机接入参数的步骤；第六种可行的方案是，所述接入点判断在预设时间范围内成功接收到的随机接入包的数量与所述可随机接入的资源的数量的比值是否小于第五阈值，当判断结果为是时，所述接入点执行更新当前随机接入参数的步骤，或者，当判断结果为否时，所述接入点执行更新当前随机接入参数的步骤。以上仅为举例，在本发明实施例中对所述接入点设定的预设条件不做限定。另外，在可行的方案中，当所述接入点根据反馈信息确定的随机接入参数与当前随机接入参数相同时，所述接入点可以将确定的随机接入参数赋值给当前随机接入参数，进而实现对当前随机接入参数的更新。
可选的，所述当前随机接入参数包括竞争窗值或接入概率。
请一并参见图4a、4b和4c，分别为本发明实施例提供了步骤S308的流程示意图，如图4a所示，步骤S308可以包括步骤S401-步骤S404。具体是若随机接入参数是竞争窗值时，步骤S308的执行过程。
S401，所述接入点获取成功接收的至少一个站点发送的随机接入包所携带的反馈信息。
具体的，所述接入点获取成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，以根据反馈信息更新当前随机接入参数。其中，所获取的成功接收的一个或者多个站点可以是预设时间范围内成功接收随机接入包的站点。
S402，所述接入点确定成功接入的次数与尝试接入的次数的比值的平均值。
具体的，当所述反馈信息包括尝试接入的次数和成功接入的次数时，所述 接入点根据所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；或者，当所述反馈信息包括尝试接入的次数时，所述接入点根据记录的所述至少一个站点的成功接入的次数和所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；或者，当所述反馈信息包括成功接入的次数与尝试接入的次数的比值时，所述接入点根据所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值。
需要说明的是，所述接入点确定成功接入的次数与尝试接入的次数的比值的平均值，一种可将至少一个站点中每一个站点的成功接入的次数进行求和，再将每一站点的尝试接入的次数求和，最后将求和后的成功接入的次数除以求和后的尝试接入的次数获得成功接入的次数与尝试接入的次数的比值的平均值；另一种可通过反馈信息计算至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值，再根据每一个站点的成功接入的次数与尝试接入的次数的比值，计算成功接入的次数与尝试接入的次数的比值的平均值。
S403，当所述成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，按照第一预设比例减小竞争窗值。
具体的，若所述当前随机接入参数为竞争窗值，当所述成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，所述接入点按照第一预设比例减小当前的竞争窗值。例如，将竞争窗值缩小至当前的竞争窗值的一半。举例来说，竞争窗值是在站点的随机接入方式为退避计数器接入方式的情况下的当前随机接入参数。
S404，当所述成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，按照第三预设比例增大竞争窗值。
具体的，若所述当前随机接入参数为竞争窗值，当所述成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，所述接入点按照第三预设比例增大当前的竞争窗值。例如，将竞争窗值增加至当前的竞争窗值的2倍。
需要说明的是，图4a所示实施例中的所述第一阈值和所述第二阈值可以是同一数值，也可以是不同数值，在本发明实施例中不做限定。
如图4b所示，步骤S308可以包括步骤S401、步骤S402、步骤S405和步骤S406。具体是当随机接入参数为接入概率时，步骤S308的执行过程。其中，步骤S401和步骤S402可参见图4a中对应步骤的介绍，在此不再赘述。
S401，所述接入点获取成功接收的至少一个站点发送的随机接入包所携带的反馈信息。
S402，所述接入点确定成功接入的次数与尝试接入的次数的比值的平均值。
S403，当所述成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，按照第二预设比例增大接入概率。
具体的，若所述当前随机接入参数为接入概率，当所述成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，所述接入点按照第二预设比例增大接入概率。例如，将接入概率增大0.1。举例来说，接入概率是在站点的随机接入方式为概率接入方式的情况下的当前随机接入参数。
S404，当所述成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，按照第四预设比例增大接入概率。
具体的，若所述当前随机接入参数为接入概率，当所述成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，所述接入点按照第四预设比例增大当前随机接入参数。例如，将接入概率减小0.1。
需要说明的是，图4b所示实施例中的所述第一阈值和所述第二阈值可以是同一数值，也可以是不同数值，在本发明实施例中不做限定。
如图4c所示，步骤S308可以包括以下步骤S407-步骤S410。
S407，所述接入点获取成功接收的至少一个站点发送的随机接入包所携带的反馈信息。
具体的，所述接入点获取成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，以根据反馈信息更新当前随机接入参数。
S408，当反馈信息包括尝试接入的次数和成功接入的次数时，接入点确定至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值；或者，当反馈信息包括尝试接入的次数时，接入点根据记录的至少一个站点的成功接入的次数和反馈信息确定至少一个站点中每一个站点的成功接入的次数 与尝试接入的次数的比值。
具体的，当所述反馈信息包括尝试接入的次数和成功接入的次数时，所述接入点计算所述至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值；或者，当所述反馈信息包括尝试接入的次数时，所述接入点根据记录的所述至少一个站点的成功接入的次数和所述反馈信息计算所述至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值。另外，当所述反馈信息包括重传尝试接入的次数和成功接入的次数；或者，所述反馈信息包括重传尝试接入的次数，将重传尝试接入的次数加1获得尝试接入的次数，再计算成功接入的次数与尝试接入的次数的比值。
S409，接入点根据当前随机接入参数和所述每一个站点的成功接入的次数与尝试接入的次数的比值，计算竞争站点数量。
具体的，接入点根据当前随机接入参数和所述每一个站点的成功接入的次数与尝试接入的次数的比值，计算竞争站点数量。如果所述接入点获取到一个站点的反馈信息时，根据该站点的成功接入的次数与尝试接入的次数的比值计算竞争站点的数量。如果所述接入点获取到多个站点的反馈信息时，一种可行的方案中，所述接入点可将所述多个站点的成功接入的次数与尝试接入的次数的比值加权平均，获得平均成功接入的次数与尝试接入的次数的比值，计算平均成功接入的次数与尝试接入的次数的比值对应的平均竞争站点数量。另一种可行的方案中，所述接入点可将所述多个站点中每一个站点的成功接入的次数与尝试接入的次数的比值，计算每一个站点对应的竞争站点数量，通过对每一个站点对应的竞争站点数量加权平均，获得平均竞争站点数量。
在上述两种可行的方案中所涉及的加权平均，可以按照所述至少一个站点分别对应的权重进行加权再计算平均值。举例来说，所述接入点为所述至少一个站点中每一个站点设置权重，一种可选的方案中，所述权重可以根据所述站点当前所在的网络覆盖范围的位置进行划分，例如，对于处在网络区域边缘的站点，可能会由于网络信号不稳定的原因造成随机接入失败，因此所述接入点可考虑对位于所述网络区域边缘的站点设置较小的权重，相反，对于处在网络区域中心的站点设置较大的权重。另一种可选的方案中，所述接入点可对所述至少一个站点的任意一个站点设置相同的权重。本发明实施例中对所述接入点 为每一个站点设置的权重不做限定。
进一步，对竞争站点数量计算规则进行介绍，在本发明实施例中，将对上述介绍的可行方案：将多个站点中每一个站点的成功接入的次数与尝试接入的次数的比值，计算每一个站点对应的竞争站点数量，通过对每一个站点对应的竞争站点数量加权平均，获得平均竞争站点数量进行具体分析。随机接入参数是站点选择可随机接入资源的依据，假设当前随机接入参数为C1，从至少一个站点中任意选择一个站点作为目标站点，假设目标站点的成功接入的次数与尝试接入的次数的比值为p2，目标站点根据当前随机接入参数为C1选择目标资源的概率为p1，进一步，目标站点选择目标资源且其他站点不选择目标资源的概率为
Figure PCTCN2016106070-appb-000001
然而，在p2与
Figure PCTCN2016106070-appb-000002
相等时能够匹配当前的网络环境，即
Figure PCTCN2016106070-appb-000003
其中，所述当前随机接入参数包括竞争窗值或接入概率。
若当前随机接入参数C1为竞争窗值，目标站点在[0，C1)范围内随机生成随机数，因此目标站点选择目标资源的概率
Figure PCTCN2016106070-appb-000004
最终目标站点对应的竞争站点数量NSTA为：
Figure PCTCN2016106070-appb-000005
若当前随机接入参数C1为接入概率，其中，C1为大于0小于1的数，目标站点在(0,1)范围内随机生成随机数P，由于当随机数P在(0,C1)范围内时，目标站点可通过可随机接入的资源发送随机接入包，因此目标站点选择目标资源的概率是C1，目标站点对应的竞争站点数量NSTA为：
Figure PCTCN2016106070-appb-000006
在计算获得所述至少一个站点中每一个站点对应的竞争站点的数量之后，通过对每一个站点对应的竞争站点数量加权平均，获得平均竞争站点数量。
S410，所述接入点根据计算的所述竞争站点数量，更新当前随机接入参数。
具体的，所述接入点根据计算的所述竞争站点数量，更新当前随机接入参数。对于不同的随机接入参数，所采用的更新方式不同。所述当前随机接入参数包括竞争窗值或接入概率。举例来说，若所述当前随机接入参数为竞争窗值，所述接入点采用所述竞争站点数量的对应数值更新所述竞争窗值；若所述当前随机接入参数为接入概率，所述接入点采用所述竞争站点数量的对应数值的倒数更新所述接入概率。另外，当所述反馈信息包括成功接入的次数与尝试接入的次数的比值时，在执行完步骤S407之后，可执行步骤S409。
需要说明的是，更新后的随机接入参数可以作为一个基准，对于不同优先级的业务，可通过对这一基准乘以不同系数，进而使得不同优先级业务对应不同的随机接入参数。
S309，所述接入点向目标站点发送更新后的随机接入参数。
具体的，所述接入点向目标站点发送更新后的随机接入参数，以使所述目标站点按照所述更新后的随机接入参数发起随机接入。其中，所述目标站点为所述接入点网络覆盖范围内的全部站点或部分站点。
举例来说，所述接入点可以在网络覆盖范围内向全部站点广播更新后的随机接入参数，以使网络覆盖范围内的全部站点按照所述更新后的随机接入参数进行随机接入。又举例来说，所述接入点可以选取部分站点，向部分站点组播更新后的随机接入参数，以使部分站点按照所述更新后的随机接入参数进行随机接入。
S310，站点接收接入点发送的随机接入参数。
具体的，站点接收所述接入点发送的随机接入参数。所述随机接入参数是所述站点选择可随机接入的资源的依据，即所述站点通过按照所述随机接入参数选择可随机接入的资源，向所述接入点发送随机接入包。需要说明的是，所述站点是接收所述接入点发送的随机接入参数的全部站点或者部分站点中的任意一个站点。
S311，当所述站点发起随机接入时，所述站点采用接收到的所述随机接入参数选择可随机接入的资源发送随机接入包，所述随机接入包携带所述站点的反馈信息。
具体的，当所述站点发起随机接入时，所述站点采用更新后的随机接入参数选择可随机接入的资源发送随机接入包。所述随机接入包携带所述站点的反馈信息。
可选的，当前随机接入参数可以包括竞争窗值或接入概率，举例来说，若随机接入参数为竞争窗值，相应地所述站点可以采用的随机接入方式为退避计数器接入方式，更新后的随机接入参数为退避计数器接入方式中的竞争窗值CW，所述站点在0到CW的范围内随机生成随机数，然后根据可随机接入资源的个数和/或其他条件更新随机数，当随机数更新为小于或等于0的值时，所述站点在可随机接入的资源中选择目标资源发送随机接入包。又举例来说，若随机接入参数为接入概率，相应地所述站点可以采用的随机接入方式为概率接入方式，更新后的随机接入参数为概率接入方式中的接入概率，所述站点在0到1之间随机生成随机数，当所述随机数小于接入概率时，在可随机接入的资源中选择目标资源发送随机接入包。
在本发明实施例中，接入点通过根据成功接收的一个或者多个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，由于反馈信息包括各个站点的当前的随机接入情况，因此接入点根据反馈信息更新的随机接入参数与当前的网络环境更加匹配，提高了随机接入参数更新的准确性，进而提高资源的利用率。
请参见图5，为本发明实施例提供了一种接入点的结构示意图。本发明实施例中的所述接入点可以是附图2-附图4c中任一实施例提供的接入点。如图5所示，本发明实施例的所述接入点1可以包括：更新单元11、发送单元12。可选的，所述接入点1还包括记录单元13。
更新单元11，用于根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，其中，一个随机接入包是由一个站点按照当前随机接入参数选择可随机接入的资源进行随机接入时所发送的，一个随机接入包携带一个站点的反馈信息。
可选的，所述反馈信息包括尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值。
可选的，记录单元13，用于当所述反馈信息包括尝试接入的次数时，在所述发送单元12在当成功接收到所述网络覆盖范围内任意一个站点通过所述随机接入信道发送的随机接入包时，反馈确认帧之后，记录发送所述随机接入包的站点的成功接入的次数。
可选的，所述当前随机接入参数包括竞争窗值或接入概率。
在一种实现方式中，请参见图6a，为本发明实施例提供的更新单元的一种结构示意图，如图6a所示，所述更新单元11包括第一获取单元111、第一确定单元112和第一更新单元113。
第一获取单元111，用于获取成功接收的至少一个站点发送的随机接入包所携带的反馈信息。
第一确定单元112，用于当所述反馈信息包括尝试接入的次数和成功接入的次数时，根据所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；或者，当所述反馈信息包括尝试接入的次数时，根据所述记录单元13记录的所述至少一个站点的成功接入的次数和所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；或者，当所述反馈信息包括成功接入的次数与尝试接入的次数的比值时，根据所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值。
第一更新单元113，用于当所述成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，按照第一预设比例减小所述竞争窗值，或按照第二预设比例增大所述接入概率；其中，所述竞争窗值或接入概率为当前的随机接入参数。
所述第一更新单元113，还用于当所述成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，按照第三预设比例增大所述竞争窗值，或按照第四预设比例减小所述接入概率。
在另一种实现方式中，请参见图6b，为本发明实施例提供的更新单元的一种结构示意图，如图6b所示，所述更新单元12包括：第二获取单元114、第二确定单元115、计算单元116和第二更新单元117。
第二获取单元114，用于获取成功接收的至少一个站点发送的随机接入包 所携带的反馈信息。
第二确定单元115，用于当所述反馈信息包括尝试接入的次数和成功接入的次数时，所述接入点确定所述至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值；或者，当所述反馈信息包括尝试接入的次数时，所述接入点根据记录的所述至少一个站点的成功接入的次数和所述反馈信息确定所述至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值。
计算单元116，用于根据当前随机接入参数和所述每一个站点的成功接入的次数与尝试接入的次数的比值，计算竞争站点数量。
第二更新单元117，用于根据计算的所述竞争站点数量，更新当前随机接入参数。其中，所述当前随机接入参数包括竞争窗值或接入概率。
所述第二更新单元117具体用于采用所述竞争站点数量的对应数值更新所述竞争窗值；或采用所述竞争站点数量的对应数值的倒数更新所述接入概率。
发送单元12，用于向目标站点发送所述更新单元更新后的随机接入参数，以使所述目标站点按照所述更新后的随机接入参数发起随机接入，其中，所述目标站点为所述接入点网络覆盖范围内的全部站点或部分站点。
可选的，所述发送单元12，还用于在网络覆盖范围内广播触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
所述发送单元12，还用于当成功接收到所述网络覆盖范围内任意一个站点通过所述随机接入信道发送的随机接入包时，反馈确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。
图5所示的接入点用于实现本发明图2至图4c对应实施例所述的内容，图5所示实施例中未揭示的内容可参见图2至图4c对应实施例的具体描述。
请参见图7，为本发明实施例提供了一种站点的结构示意图。本发明实施例中的所述站点可以是附图2-附图4c中任一实施例提供的站点。如图7所示，本发明实施例的所述站点2可以包括：接收单元21和发送单元22。可选的，所述站点2还包括更新单元23。所述站点2是所述接入点的网络覆盖范围内的任意一个站点。
接收单元21，用于接收接入点发送的随机接入参数。
发送单元22，用于当所述站点发起随机接入时，采用所述接收单元21接收到的所述随机接入参数选择可随机接入的资源发送随机接入包，所述随机接入包携带所述站点的反馈信息。
可选的，所述反馈信息包括尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值。
可选的，所述接收单元21还用于接收接入点广播的触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
可选的，所述更新单元23，用于当在预设时间范围内未接收到所述接入点反馈的确认帧时，更新所述反馈信息中的所述尝试接入的次数；或者，所述站点更新所述反馈信息中的所述成功接入的次数与尝试接入的次数的比值；其中，所述确认帧用于向所述站点指示所述接入点成功接收所述随机接入包。
所述发送单元22，还用于向所述接入点重新发送携带更新后的反馈信息的随机接入包。
图7所示的站点用于实现本发明图2至图4c对应实施例所述的内容，图7所示实施例中未揭示的内容可参见图2至图4c对应实施例的具体描述。
请参见图8，为本发明实施例提供的另一种接入点的结构示意图，如图8所示，该接入点1包括：至少一个处理器1001，例如CPU，至少一个通信总线1002，输入设备1003、输出设备1004，存储器1005。其中，通信总线1002用于实现这些组件之间的连接通信。输入设备1003和输出设备1004可以是以太接口。存储器1005可以是高速RAM存储器，也可以是非不稳定的存储器(non-volatile memory)，例如至少一个磁盘存储器。
其中，所述处理器1001还执行图2至图4c中涉及接入点1的处理过程和/或用于本发明所描述的技术的其他过程。所述存储器用于存储接入点1的程序代码和数据。输入设备1003和输出设备1004用于支持图2至图4c所示的接入点1与站点之间的通信。
作为示例，所述处理器1001用于执行图2中的步骤S201和步骤S202；或者，所述处理器1001用于执行图3中的步骤S301、步骤S304、步骤S308、 步骤S309，以及还用于执行图4a、图4b和图4c所包含的部分或者全部步骤。
所述输出设备1004用于支持所述接入点1执行图2中的步骤S202；或者，所述输出设备1004用于支持所述接入点1执行图3中的步骤S301、步骤S304和步骤S309。
所述输入设备1003用于支持所述接入点1执行图3中针对步骤S303的接收站点通过当前随机接入参数发送的随机接入包的步骤、针对步骤S307中接收站点发送的待传输数据的步骤和针对步骤S311中接收站点通过更新后的随机接入参数发送的随机接入包的步骤。
请参见图9，为本发明实施例提供的另一种站点的结构示意图，如图9所示，该接入点包括：至少一个处理器2001，例如CPU，至少一个通信总线2002，输入设备2003、输出设备2004，存储器2005。其中，通信总线2002用于实现这些组件之间的连接通信。其中，存储器2006可以是高速RAM存储器，也可以是非不稳定的存储器，例如至少一个磁盘存储器。
其中，所述处理器2001还执行图2至图4c中涉及站点2的处理过程和/或用于本发明所描述的技术的其他过程。所述存储器用于存储站点2的程序代码和数据。输入设备2003和输出设备2004用于支持图2至图4c所示的站点2与接入点之间的通信。
作为示例，所述处理器2001用于执行图2中的步骤S203和S204；或者，所述处理器2001用于执行图3中的步骤S302、步骤S303、步骤S305、步骤S306、步骤S307、步骤S310和步骤S311。
所述输出设备2004用于支持所述站点2执行图2中的S204；或者，所述输出设备2004用于支持所述站点2执行图3中的步骤S303、步骤S307和步骤S311。
所述输人设备2003用于支持所述站点2执行图2中的步骤S203；或者，所述输人设备2003用于支持所述站点2执行图3中的步骤S302、步骤S305和步骤S310。
需要说明的是，图8所示的接入点1和图9所示的站点2用于实现本发明图2至图4c对应实施例的述的内容。
本发明实施例还提供一种用于随机接入参数的更新系统，所述系统包括图 5或图8所述的接入点1，以及图7或图9所述的站点2。
请参见图10，为本发明实施例提供了另一种随机接入参数的更新方法的流程示意图。如图10所示，本发明实施例的所述方法可以包括以下步骤S501-步骤S505。
S501，站点接收接入点广播的触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
具体的，所述站点接收接入点广播的触发帧。可选的，所述接入点可以周期性地广播触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。例如，所述触发帧用于指示可用于随机接入的子信道、子资源块或者其他资源格式的资源。可选的，所述触发帧还可以用于指示包含一个或者多个可调度接入的资源的调度接入信道等，本发明实施例对此不做限定。
需要说明的是，站点与接入点之间进行数据传输之前，需要发起随机接入过程。而接入点会通过广播触发帧的方式向网络覆盖范围内的多个站点提供多个可随机接入的资源，每一个站点按照随机接入参数选择资源，并通过所选择的资源发送随机接入包。可选的，所述站点是所述接入点的网络覆盖范围内的任意一个站点。
S502，所述站点根据当前随机接入参数选择可随机接入的资源进行随机接入。
具体的，所述站点根据当前随机接入参数选择可随机接入的资源进行随机接入。其中，所述当前随机接入参数可以是由无线局域网标准确定，即，所述站点采用默认的随机接入参数向所述接入点发送随机接入包；或者，所述当前随机接入参数是由所述接入点确定的，即，所述站点在向所述接入点发送随机接入包之前，所述接入点向网络覆盖范围内的任一站点广播或者向部分站点组播当前随机接入参数，以使所述站点根据广播的随机接入参数进行随机接入；或者，当前随机接入参数为所述站点上一次对接入点发送的随机接入参数更新之后得到的。可行的方案中，所述接入点在所述站点初次随机接入时，所述接入点向所述站点发送随机接入参数的最小值Cmin，所述站点将接收到的Cmin设置为当前随机接入参数。
可选的，所述站点可以采用的随机接入方式为退避计数器接入方式，在这 种方式下，当前随机接入参数即为竞争窗值，所述站点根据所述当前随机接入参数选择可随机接入的资源进行随机接入，具体可一并参见图13a和图13b，均为本发明实施例提供的步骤S502的流程示意图。
在附图13a中，包括步骤S801至步骤S805，具体请参见一下描述。
S801，所述站点检测是否存在已生成的随机数。
具体的，所述站点检测是否存在已生成的随机数，可行的方案中，所述站点检测是否存在为另外一次随机接入生成了随机数，若是，则执行步骤S803，若否，则执行步骤S802。
S802，所述站点根据当前随机接入参数生成随机数。
具体的，若所述站点检测不存在已生成的随机数，则所述站点根据更新后的随机接入参数生成随机数，举例来说，设当前随机接入参数用C1表示，所述站点在0到C1的范围内随机生成随机数R。
S803，所述站点检测随机数是否满足随机接入条件。
具体的，所述站点检测随机数是否满足随机接入条件，可选的，所述站点检测随机数R是否满足随机接入条件可以为检测随机数R是否小于所述触发帧中包含的可随机接入的资源的数量N。若不满足，则执行步骤S804，若满足，则执行步骤S805。
在本发明实施例中，可以在步骤S802之后执行步骤S803，还可以在步骤S801检测存在已生成的随机数之后，执行步骤S803。
S804，所述站点更新随机数。
具体的，若所述站点检测到所述随机数不满足所述随机接入条件，所述站点更新随机数R，可行的方案中，更新随机数R的方式为：更新后的随机数为更新前的随机数减去可随机接入资源的数量的差值，并记录更新后的随机数。进一步，在步骤S804之后，一种可行的方案中，所述站点等待接收接入点广播的触发帧，即所述站点还可以继续执行步骤S501；另一种可行的方案中，所述站点可以再次执行步骤S803检测更新后的随机数是否满足随机接入条件，直至满足随机接入条件之后，执行步骤S05。
S805，所述站点选择可随机接入的资源发送随机接入包。
具体的，若所述站点检测到所述随机数满足所述随机接入条件，所述站点 选择可随机接入的资源发送随机接入包。可行的方案中，所述站点可以根据满足所述随机接入条件的，随机数选择可随机接入的资源发送随机接入包。举例来说，假设可随机接入的资源的数量N选择为8；随机数R为20；在采用通过步骤S803和步骤S804循环更新随机数(R-N)的步骤之后，满足所述随机接入条件的随机数为4，则所述站点选择所述触发帧中包含的第4个可随机接入资源发送随机接入包。可行的方案中，所述站点可以随机选择一个可随机接入的资源发送随机接入包。
在附图13b中，包括步骤S806至步骤S810，具体请参见一下描述。
S806，所述站点检测是否存在已生成的随机数。
具体的，所述站点检测是否存在已生成的随机数，可行的方案中，所述站点检测是否存在为另外一次随机接入生成了随机数，若是，则执行步骤S808，若否，则执行步骤S807。
S807，所述站点根据当前随机接入参数生成随机数。
具体的，若所述站点检测不存在已生成的随机数，则所述站点根据当前随机接入参数生成随机数，举例来说，设当前随机接入参数用C1表示，所述站点在0到C1的范围内随机生成随机数R。
S808，所述站点更新随机数。
具体的，所述站点更新随机数R，可行的方案中，更新随机数R的方式为：更新后的随机数为更新前的随机数减去可随机接入资源的数量的差值，并记录更新后的随机数。
在本发明实施例中，可以在步骤S807之后执行步骤S808，还可以在步骤S801检测存在已生成的随机数之后，执行步骤S808。
S809，所述站点检测随机数是否满足随机接入条件。
具体的，所述站点检测随机数是否满足随机接入条件，可选的，所述站点检测随机数R是否满足随机接入条件可以为检测随机数R是否小于可随机接入的资源的数量N。若满足，则执行步骤S810。若不满足，一种可行的方案中，所述站点等待接收接入点广播的触发帧，即所述站点还可以继续执行步骤S501；另一种可行的方案中，所述站点可以再次执行步骤S808更新随机数的步骤，直至满足随机接入条件之后，执行步骤S810。
S810，所述站点选择可随机接入的资源发送随机接入包。
具体的，若所述站点检测到所述随机数满足所述随机接入条件，所述站点选择可随机接入的资源发送随机接入包。可行的方案中，所述站点可以根据满足所述随机接入条件的，随机数选择可随机接入的资源发送随机接入包。举例来说，假设可随机接入的资源的数量N选择为8；随机数R为20；在采用通过步骤S803和步骤S804循环更新随机数(R-N)的步骤之后，满足所述随机接入条件的随机数为4，则所述站点选择所述触发帧中包含的第4个可随机接入资源发送随机接入包。
S503，所述站点判断是否接收到所述接入点反馈的确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。
具体的，所述站点判断是否接收到所述接入点反馈的确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。若所述站点判断接收到所述确认帧，则执行步骤S504，若所述站点判断未接收到所述确定帧，则执行步骤S505。
S504，按照第一预设方式更新所述当前随机接入参数。
具体的，若所述站点判断接收到所述确认帧，则所述站点按照第一预设方式更新当前随机接入参数，并记录更新后的随机接入参数。其中，第一预设方式为按照第一预设比例减小当前随机接入参数的方式。若所述站点判断接收到所述确认帧，表示所述站点可以通过所述当前随机接入参数成功发送随机接入包，即有可能需要使用可随机接入资源发送随机接入包的站点数量较少，因此所述站点按照第一预设比例减小当前随机接入参数，例如，设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，第一预设方式为按照一定的倍数减少的方式：C2＝C1/2，或者为减少一定数值的方式：C2＝C1-i，i为正整数，或者为减少到随机接入参数的最小值的方式：C2＝Cmin，其中，Cmin为所述站点根据接收接入点广播的信标帧所确定的，需要说明的是，接入点会周期性地广播信标帧，信标帧中携带随机接入参数的最小值Cmin和随机接入参数的最大值Cmax。可行的方案中，在按照第一预设方式减少所述当前随机接入参数的过程中，检测减少后的随机接入参数是否小于Cmin，若是则采用Cmin，否则采用减少后的随机接入参数。
S505，按照第二预设方式更新所述当前随机接入参数。
具体的，若所述站点判断未接收到所述确认帧，则按照第二预设方式更新当前随机接入参数，并记录更新后的随机接入参数。其中，第二预设方式为按照第二预设比例增大当前随机接入参数的方式。若所述站点判断接收到所述确认帧，表示所述站点通过所述当前随机接入参数未成功发送随机接入包，即有可能需要使用可随机接入资源发送随机接入包的站点数量较多，使得各个站点在随机接入时发生冲突导致随机接入失败，因此所述站点以增大当前随机接入参数的方式，使得多个站点分散开选择可随机接入资源，减少冲突。例如，设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，第二预设方式为按照一定的倍数增大的方式：C2＝C1*2，或者为增加一定数值的方式：C2＝C1+i，i为正整数，或者为增大到随机接入参数的最大值的方式：C2＝Cmax，其中，Cmax为所述站点根据接收接入点广播的信标帧所确定的，需要说明的是，接入点会周期性地广播信标帧，信标帧中携带随机接入参数的最小值Cmin和随机接入参数的最大值Cmax；可行的方案中，在按照第二预设方式增大所述当前随机接入参数的过程中，检测增大后的随机接入参数是否大于Cmax，若是则采用Cmax，否则采用增大后的随机接入参数。
进一步，在步骤S504和步骤S505更新所述当前随机接入参数之后，所述站点可以执行等待接入点广播的触发帧，即可以继续执行步骤S501，当然，可以理解是，在接收到接入点广播的触发帧之后，步骤S502中的当前随机接入参数已经为步骤S504或步骤S505更新后的随机接入参数。
在本发明实施例中，站点接收接入点广播的触发帧，并根据当前随机接入参数选择可随机接入的资源进行随机接入之后，通过是否接收到接入点发送的确认帧，而确定相应的方式更新当前随机接入参数，这样站点可以采用更新后的随机接入参数执行下一次的随机接入。这样站点可以根据是否接收到确认帧而自行调整随机接入参数，增强了站点对随机接入参数的控制能力，有利于提高随机接入的效率。
请参见图11，为本发明实施例提供了另一种随机接入参数的更新方法的流程示意图。如图11所示，本发明实施例的所述方法可以包括以下步骤S601-步骤S607。
S601，站点接收接入点广播的触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
具体的，所述站点接收接入点广播的触发帧。可选的，所述接入点可以周期性地广播触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。例如，所述触发帧用于指示可用于随机接入的子信道、子资源块或者其他资源格式的资源。可选的，所述触发帧还可以用于指示包含一个或者多个可调度接入的资源的调度接入信道等，本发明实施例对此不做限定。
需要说明的是，站点与接入点之间进行数据传输之前，需要发起随机接入过程。而接入点会通过广播触发帧的方式向网络覆盖范围内的多个站点提供多个可随机接入的资源，每一个站点按照随机接入参数选择资源，并通过所选择的资源发送随机接入包。可选的，所述站点是所述接入点的网络覆盖范围内的任意一个站点。
S602，所述站点判断所述触发帧中是否携带目标随机接入参数。
具体的，所述站点判断所述触发帧中是否携带目标随机接入参数。可行的方案中，目标随机接入参数是由接入点确定并通过广播触发帧发送至所述站点的。
S603，若携带所述目标随机接入参数，则所述站点根据所述目标随机接入参数和第三预设方式更新当前随机接入参数，根据更新后的随机接入参数选择可随机接入的资源进行随机接入。
具体的，若所述站点判断所述触发帧中携带所述目标随机接入参数，则所述站点根据所述目标随机接入参数和第三预设方式更新当前随机接入参数，根据更新后的随机接入参数选择可随机接入的资源进行随机接入。
可行的方案中，所述站点根据所述目标随机接入参数和第三预设方式更新当前随机接入参数，具体可以包括步骤A1至步骤A3：
A1，所述站点判断所述目标随机接入参数是否为指定值，所述指定值用于指示所述站点根据与所述指定值对应的指定方式更新所述当前随机接入参数。
A2，若所述站点判断所述目标随机接入参数为所述指定值，所述第三预设方式为与所述指定值对应的所述指定方式，则所述站点根据与所述指定值对 应的指定方式更新所述当前随机接入参数。其中，所述指定值是所述接入点和所述站点预先指定的数值，举例来说，设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，指定值为255，与指定值对应的指定方式为按照当前随机接入参数C1的2倍进行更新，则当所述站点判断所述触发帧中的目标随机接入参数为255时，所述站点更新后的随机接入参数C2＝C1*2。
A3，若所述站点判断所述目标随机接入参数不是所述指定值，所述第三预设方式为直接赋值的方式，则所述站点将所述目标随机接入参数直接设定为更新后的随机接入参数。举例来说，设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，指定值为255，则当所述站点判断所述触发帧中的目标随机接入参数为16时，所述站点更新后的随机接入参数C2＝16。可行的方案中，所述接入点也可以通过触发帧发送随机接入参数的最小值Cmin，若Cmin不是指定值的情况下，采用直接赋值的方式完成更新。
需要说明的是，所述第三预设方式可以是由所述站点和所述接入点预先约定好的，即所述站点和所述接入点预先指定一个或者多个指定值，并指定与各个指定值对应的指定方式，且与各个指定值对应的指定方式可以互不相同，本发明实施例对此不作限定；同样，所述站点和所述接入点指定非所述指定值的第三预设方式为直接赋值的方式。
进一步，步骤S602和步骤S603的方案对应于所述触发帧中携带目标随机接入参数的方案，再一可行的方案中，所述触发帧中可以携带目标随机接入参数和第三预设方式，所述站点在执行步骤S601之后，所述站点根据所述触发帧中的所述目标随机接入参数和第三预设方式更新当前随机接入参数，具体是：所述接入点将携带目标随机参数和第三预设方式的触发帧进行广播，这样所述站点接收到接入点广播的触发帧之后，根据所述目标随机接入参数和第三预设方式更新当前随机接入参数。设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，举例来说，目标随机接入参数为16，第三预设方式为直接赋值的方式，当所述站点检测到所述触发帧中的目标随机接入参数为16、第三预设方式为直接赋值的方式时，所述站点更新后的随机接入参数C2＝16；或者，又举例来说，目标随机接入参数为255，与目标随机接入参数为255对应的第三预设方式为按照当前随机接入参数C1的2倍进行更新，并且所述目标 随机接入参数为255时的第三预设方式是所述站点和所述接入点预先约定好的，无需在广播触发帧时发送，则当所述站点判断所述触发帧中的目标随机接入参数为255时，所述站点更新后的随机接入参数C2＝C1*2。又一可行的方案中，所述触发帧中可以携带第三预设方式，所述站点在执行步骤S601之后，所述站点根据所述触发帧中的所述第三预设方式更新当前随机接入参数，具体是：所述接入点将携带第三预设方式的触发帧进行广播，这样所述站点接收到接入点广播的触发帧之后，根据所述第三预设方式更新当前随机接入参数。设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，举例来说，第三预设方式为按照当前随机接入参数C1的1/2进行更新，则所述站点更新后的随机接入参数C2＝C1/2。
S604，若不携带所述目标随机接入参数，所述站点根据当前随机接入参数选择可随机接入的资源进行随机接入。
具体的，若不携带所述目标随机接入参数，则所述站点根据当前随机接入参数选择可随机接入的资源进行随机接入。其中，所述当前随机接入参数可以是由无线局域网标准确定，即，所述站点采用默认的随机接入参数向所述接入点发送随机接入包；或者，所述当前随机接入参数是由所述接入点确定的，即，所述站点在向所述接入点发送随机接入包之前，所述接入点向网络覆盖范围内的任一站点广播或者向部分站点组播当前随机接入参数，以使所述站点根据广播的随机接入参数进行随机接入；或者，当前随机接入参数为所述站点上一次对接入点发送的随机接入参数更新之后得到的。
需要说明的是，不论是步骤S603中根据更新后的随机接入参数选择可随机接入的资源进行随机接入；还是步骤S604中根据当前随机接入参数选择可随机接入的资源进行随机接入，具体可一并参见图13a和图13b，若为步骤S603中根据更新后的随机接入参数选择可随机接入的资源进行随机接入，可将图13a和图13b中的当前随机接入参数变更为更新后的随机接入参数进行执行；若为步骤S604中根据当前随机接入参数选择可随机接入的资源进行随机接入，即可按照图13a和图13b进行执行，具体的执行过程可参考在附图10所示实施例中的具体介绍，在此不再赘述。
需要说明的是，步骤S602、步骤S603和步骤S604是所述触发帧中携带 目标随机接入参数时的执行流程图，对于所述触发帧中携带目标随机接入参数和第三预设方式或者所述触发帧中携带第三预设方式也可以按照步骤S602、步骤S603和步骤S604的方式进行执行。
S605，所述站点判断是否接收到所述接入点反馈的确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。
具体的，所述站点判断是否接收到所述接入点反馈的确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。若所述站点判断接收到所述确认帧，则执行步骤S606，若所述站点判断未接收到所述确定帧，则执行步骤S607。
需要说明的是，不论是在步骤S603中根据更新后的随机接入参数选择可随机接入的资源进行随机接入之后；还是在步骤S604中根据当前随机接入参数选择可随机接入的资源进行随机接入之后，都可以执行步骤S605。
S606，若接收到所述确认帧，则按照第一预设方式更新当前随机接入参数。
具体的，若所述站点判断接收到所述确认帧，则所述站点按照第一预设方式更新当前随机接入参数，并记录更新后的随机接入参数。其中，第一预设方式为按照第一预设比例减小当前随机接入参数的方式。若所述站点判断接收到所述确认帧，表示所述站点可以通过所述当前随机接入参数成功发送随机接入包，即有可能需要使用可随机接入资源发送随机接入包的站点数量较少，因此所述站点按照第一预设比例减小当前随机接入参数，例如，设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，第一预设方式为按照一定的倍数减少的方式：C2＝C1/2，或者为减少一定数值的方式：C2＝C1-i，i为正整数，或者为减少到随机接入参数的最小值的方式：C2＝Cmin，其中，Cmin为所述站点根据接收接入点广播的信标帧所确定的，需要说明的是，接入点会周期性地广播信标帧，信标帧中携带随机接入参数的最小值Cmin和随机接入参数的最大值Cmax。可行的方案中，在按照第一预设方式减少所述当前随机接入参数的过程中，检测减少后的随机接入参数是否小于Cmin，若是则采用Cmin，否则采用减少后的随机接入参数。
S607，若未接收到所述确认帧，则按照第二预设方式更新当前随机接入参数。
具体的，若所述站点判断未接收到所述确认帧，则按照第二预设方式更新当前随机接入参数，并记录更新后的随机接入参数。其中，第一预设方式为按照第一预设比例增大当前随机接入参数的方式。若所述站点判断接收到所述确认帧，表示所述站点通过所述当前随机接入参数未成功发送随机接入包，即有可能需要使用可随机接入资源发送随机接入包的站点数量较多，使得各个站点在随机接入时发生冲突导致随机接入失败，因此所述站点以增大当前随机接入参数的方式，使得多个站点分散开选择可随机接入资源，减少冲突。例如，设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，第二预设方式为按照一定的倍数增大的方式：C2＝C1*2，或者为增加一定数值的方式：C2＝C1+i，i为正整数，或者为增大到随机接入参数的最大值的方式：C2＝Cmax，其中，Cmax为所述站点根据接收接入点广播的信标帧所确定的，需要说明的是，接入点会周期性地广播信标帧，信标帧中携带随机接入参数的最小值Cmin和随机接入参数的最大值Cmax；可行的方案中，在按照第二预设方式增大所述当前随机接入参数的过程中，检测增大后的随机接入参数是否大于Cmax，若是则采用Cmax，否则采用增大后的随机接入参数。
进一步，在步骤S606和步骤S607更新所述当前随机接入参数之后，所述站点可以执行等待接入点广播的触发帧，即可以继续执行步骤S601，当然，可以理解是，在接收到接入点广播的触发帧之后，步骤S604中的当前随机接入参数已经为步骤S606或步骤S607更新后的随机接入参数。
在本发明实施例中，站点接收接入点广播的触发帧，通过检测触发帧中是否携带目标随机接入参数而确定是否对当前随机接入参数进行更新，在站点选择可随机接入的资源进行随机接入之后，通过是否接收到接入点发送的确认帧，而确定相应的方式更新当前随机接入参数，这样站点可以采用更新后的随机接入参数执行下一次的随机接入。这样站点可以根据触发帧中携带的目标随机接入参数更新当前随机接入参数，以及根据是否接收到确认帧而自行调整随机接入参数，增强了站点对随机接入参数的控制能力，还可以根据接入点的反馈更新随机接入参数，这样更加有利于提高随机接入的效率。
请参见图12，为本发明实施例提供了另一种随机接入参数的更新方法的 流程示意图。如图12所示，本发明实施例的所述方法可以包括以下步骤S701-步骤S707。
S701，站点接收接入点广播的触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
具体的，所述站点接收接入点广播的触发帧。可选的，所述接入点可以周期性地广播触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。例如，所述触发帧用于指示可用于随机接入的子信道、子资源块或者其他资源格式的资源。可选的，所述触发帧还可以用于指示包含一个或者多个可调度接入的资源的调度接入信道等，本发明实施例对此不做限定。
需要说明的是，站点与接入点之间进行数据传输之前，需要发起随机接入过程。而接入点会通过广播触发帧的方式向网络覆盖范围内的多个站点提供多个可随机接入的资源，每一个站点按照随机接入参数选择资源，并通过所选择的资源发送随机接入包。可选的，所述站点是所述接入点的网络覆盖范围内的任意一个站点。
S702，所述站点根据当前随机接入参数选择可随机接入的资源进行随机接入。
具体的，所述站点根据当前随机接入参数选择可随机接入的资源进行随机接入。其中，所述当前随机接入参数可以是由无线局域网标准确定，即，所述站点采用默认的随机接入参数向所述接入点发送随机接入包；或者，所述当前随机接入参数是由所述接入点确定的，即，所述站点在向所述接入点发送随机接入包之前，所述接入点向网络覆盖范围内的任一站点广播或者向部分站点组播当前随机接入参数，以使所述站点根据广播的随机接入参数进行随机接入；或者，当前随机接入参数为所述站点上一次对接入点发送的随机接入参数更新之后得到的。
可选的，所述站点可以采用的随机接入方式为退避计数器接入方式，在这种方式下，当前随机接入参数即为竞争窗值，所述站点根据所述当前随机接入参数选择可随机接入的资源进行随机接入，具体可一并参见图13a和图13b，具体的执行过程可参考在附图10所示实施例中的具体介绍，在此不再赘述。
S703，所述站点判断是否接收到所述接入点反馈的确认帧，所述确认帧用 于向发送所述随机接入包的站点指示成功接收所述随机接入包。
具体的，所述站点判断是否接收到所述接入点反馈的确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。若所述站点判断接收到所述确认帧，则执行步骤S704，若所述站点判断未接收到所述确定帧，则执行步骤S705。
S704，按照第一预设方式更新所述当前随机接入参数。
具体的，所述站点接收到所述接入点反馈的确定人之后，执行按照第一预设方式更新所述当前随机接入参数，并记录更新后的随机接入参数。其中，第一预设方式为按照第一预设比例减小当前随机接入参数的方式。若所述站点判断接收到所述确认帧，表示所述站点可以通过所述当前随机接入参数成功发送随机接入包，即有可能需要使用可随机接入资源发送随机接入包的站点数量较少，因此所述站点按照第一预设比例减小当前随机接入参数，例如，设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，第一预设方式为按照一定的倍数减少的方式：C2＝C1/2，或者为减少一定数值的方式：C2＝C1-i，i为正整数，或者为减少到随机接入参数的最小值的方式：C2＝Cmin，其中，Cmin为所述站点根据接收接入点广播的信标帧所确定的，需要说明的是，接入点会周期性地广播信标帧，信标帧中携带随机接入参数的最小值Cmin和随机接入参数的最大值Cmax。可行的方案中，在按照第一预设方式减少所述当前随机接入参数的过程中，检测减少后的随机接入参数是否小于Cmin，若是则采用Cmin，否则采用减少后的随机接入参数。
S705，所述站点判断所述触发帧中是否携带目标随机接入参数。
具体的，所述站点未接收到所述接入点反馈的确定人之后，执行判断所述触发帧中是否携带目标随机接入参数。可行的方案中，目标随机接入参数是由接入点确定并通过广播触发帧发送至所述站点的。
S706，若携带所述目标随机接入参数，则所述站点根据所述目标随机接入参数和第三预设方式更新当前随机接入参数，根据更新后的随机接入参数选择可随机接入的资源进行随机接入。
具体的，步骤S706的执行方式可以参见图11中步骤S603的详细描述，再次不再赘述。
S707，若为携带所述目标随机接入参数，按照第二预设方式更新所述当前随机接入参数。
具体的，若为携带所述目标随机接入参数，所述站点按照第二预设方式更新所述当前随机接入参数，并记录更新后的随机接入参数。其中，第二预设方式为按照第二预设比例增大当前随机接入参数的方式。若所述站点判断接收到所述确认帧，表示所述站点通过所述当前随机接入参数未成功发送随机接入包，即有可能需要使用可随机接入资源发送随机接入包的站点数量较多，使得各个站点在随机接入时发生冲突导致随机接入失败，因此所述站点以增大当前随机接入参数的方式，使得多个站点分散开选择可随机接入资源，减少冲突。例如，设当前随机接入参数用C1表示，更新后的随机接入参数用C2表示，第二预设方式为按照一定的倍数增大的方式：C2＝C1*2，或者为增加一定数值的方式：C2＝C1+i，i为正整数，或者为增大到随机接入参数的最大值的方式：C2＝Cmax，其中，Cmax为所述站点根据接收接入点广播的信标帧所确定的，需要说明的是，接入点会周期性地广播信标帧，信标帧中携带随机接入参数的最小值Cmin和随机接入参数的最大值Cmax；可行的方案中，在按照第二预设方式增大所述当前随机接入参数的过程中，检测增大后的随机接入参数是否大于Cmax，若是则采用Cmax，否则采用增大后的随机接入参数。
进一步，在步骤S704、S706和步骤S707更新所述当前随机接入参数之后，所述站点可以执行等待接入点广播的触发帧，即可以继续执行步骤S701，当然，可以理解是，在接收到接入点广播的触发帧之后，步骤S702中的当前随机接入参数已经为步骤S704、S706或步骤S707更新后的随机接入参数。
在本发明实施例中，站点接收接入点广播的触发帧，通过检测触发帧中是否携带目标随机接入参数而确定是否对当前随机接入参数进行更新，在站点选择可随机接入的资源进行随机接入之后，通过是否接收到接入点发送的确认帧，而确定相应的方式更新当前随机接入参数，这样站点可以采用更新后的随机接入参数执行下一次的随机接入。这样站点可以根据触发帧中携带的目标随机接入参数更新当前随机接入参数，以及根据是否接收到确认帧而自行调整随机接入参数，增强了站点对随机接入参数的控制能力，还可以根据接入点的反馈更新随机接入参数，这样更加有利于提高随机接入的效率。
需要说明的是，附图10-附图13b所示实施例的方案可以应用于正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)的信道竞争中，所述触发帧中所包含的一个或者多个可随机接入的资源的随机接入信道可以是频带资源，对于初始上行OFDMA随机接入，站点根据从接入点获取的随机接入参数设置当前随机接入参数C1，其中，从接入点获取的随机接入参数可以是Cmin，也可以是其他数值的随机接入参数，并在0到C1范围内生成随机数R，如果R小于触发帧中指示的可随机接入的资源的个数，站点将随机数R更新至0，或站点将随机数R更新为随机数R减去触发帧中指示的可随机接入的资源的个数后的值；如果随机数R减为0，站点随机选择一个可随机接入的资源，在该资源上发送上行表示协议数据单元(Presentation Protocol Data Unit，PPDU)。
在实际应用中，站点在上行随机接入中可以结合使用上行OFDMA随机接入和增强分布式信道接入(Enhanced Distributed Channel Access，EDCA)。上行OFDMA随机接入可接收多站点同时上行发送，能够增强随机接入效率，但多站点必须等待接入点发送包含多个可随机接入的资源的触发帧之后才能接入。进一步，所述接入点可以通过发送不同类型的帧以指示站点采用OFDMA随机接入或指示站点采用EDCA信道接入，例如不同类型帧分别为第一类帧和第二类帧，所述第一类帧可以包括但不限定于信标帧、管理帧、关联帧等，所述第二类帧包括触发帧，触发帧可以为给站点提供上行传输资源的上行触发帧，或者可以为给站点提供上行OFDMA随机接入传输资源的上行触发帧。其中，第一类帧和第二类帧均可以携带随机接入参数A和随机接入参数B，可行的方案中，在各类帧中可以包括随机接入参数A和/或随机接入参数B。
举例来说，随机接入参数A和随机接入参数B均可以包括竞争窗口(CW，即为图10-图13b中所涉及的随机接入参数)和/或仲裁帧间间隔(AIFSN)，接入点可通过设定CW为指定值，指示执行站点禁用、关闭EDCA信道接入的功能；接入点还可以通过设定AIFSN为指定值，指示站点禁用、关闭EDCA信道接入的功能，所述站点禁用、关闭EDCA信道接入的功能的方式包括且不限于暂停EDCA退避，保持退避计数值不变或关闭退避计计数器。可选的，随机接入参数B中参数的数值小于随机接入参数A中参数的数值。
当CW字段为CWn时(n、s为角标，n不等于s)，表示窗口大小n；窗口大小n为协议预先约定。当CW字段为特定CWs时，为禁用、关闭EDCA信道接入方式。当CW字段为CWs时，或称为窗口大小无穷大。
当AIFSN字段为AIFSNn时(n、s为角标，n不等于s)，表示间隔时隙数n；间隔时隙数n为协议预先约定。当AIFSN字段为AIFSNs时，表示禁用、关闭EDCA信道接入方式。当AIFSN字段为AIFSNs时，或称为间隔时隙数无穷大。
例如当CW字段bit序列为0001时，表示15；当CW值为0010时，表示31；…当CW值为1110时，表示16383；当CW值为1111时，表示禁用、关闭EDCA信道接入方式，或称为间隔时隙数无穷大。具体实施中，也可使用其他约定值。具体实施中，可采用其他bit序列长度，和映射关系。例如下表：
CW  
   
0001 15
0010 31
… …
1110 16383
1111 禁用EDCA/(无穷大)
CW字段还可以以其他映射形式表示，例如下表：
ECW  
   
0001 1
0010 2
… …
1110 14
1111 禁用EDCA/(无穷大)
例如当AIFSN字段bit序列为0001时，表示1；当AIFSN值为0010时， 表示2；…当AIFSN值为1110时，表示14；当AIFSN值为1111时，表示禁用、关闭EDCA信道接入方式，或称为间隔时隙数无穷大。
接入点可指示站点所用的随机接入参数。接入点可指示站点的指定数据队列的随机接入参数。除了针对每队列单独设定随机接入参数，具体实施中，上述CW可细化为CWmin和CWmax。站点使用CWmin做为CW默认(初始)设定值，当传输失败(未接收到确认回复时)，CW更新为现CW经过一个预设运算后的输出值。该预设运算可以是输入值乘以一个预定常数。或加上一个预定常数或指定数。当预设运算后的输出值大于CWmax时，CW更新为CWmax。
接入点除包含随机接入参数A，还可同时包含随机接入参数B。随机接入参数B用于不具备OFDMA随机接入功能的站点，随机接入参数A仅用于OFDMA随机接入功能的站点。这里OFDMA随机接入功能还可以指多用户(multi-user，MU)传输能力，具体是指设备向接入点汇报的自身的能力，或设备实际是否支持MU传输能力。或随机接入参数B用于不参与MU传输的站点，随机接入参数A仅用于参与MU传输能力的站点。
当站点收到随机接入参数A后，若CW值为CWs，则站点暂停EDCA退避，保持退避计数值不变。若CW值非CWs，则站点将CW设为该CW值。若CWmin值非CWmins，则站点将CWmin设为该CWmin值。
当站点收到随机接入参数A后，若CW值为CWs，则站点暂停EDCA退避，保持退避计数值不变。或禁止使用基于竞争的接入时段。
举例来说，如图14所示，图14的(1)中接入点(AP)发送第一类帧，站点(STA)在收到第一类帧的指示后，使用第一类帧的指示的参数进行信道接入。站点使用随机接入参数A中的参数进行EDCA接入。
图14的(2)中站点在收到第二类帧后，使用随机接入参数A中的参数进行EDCA接入。第二类帧为一个协议指定帧，例如一个管理帧、控制帧、或数据帧。第二类帧可以为一个上行触发帧。可选地，第二类帧可以为给该站点提供上行传输资源的上行触发帧。可选地，第二类帧可以为给该站点提供上行OFDMA随机接入传输资源的上行触发帧。
图14的(3)中站点在收到第二类帧后，使用随机接入参数A中的参数 进行EDCA接入。第二类帧为一个协议指定帧，例如一个管理帧、控制帧、或数据帧。第二类帧可以为一个上行触发帧。可选地，第二类帧可以为给该站点提供上行传输资源的上行触发帧。可选地，第二类帧可以为给该站点提供上行OFDMA随机接入传输资源的上行触发帧。在收到第二类帧前，站点可以使用随机接入参数B中的参数进行EDCA接入。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。

Claims (22)

  1. 一种随机接入参数的更新方法，其特征在于，包括：
    接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，其中，一个随机接入包是由一个站点按照所述当前随机接入参数选择可随机接入的资源进行随机接入时所发送的，一个随机接入包携带一个站点的反馈信息；
    所述接入点向目标站点发送更新后的随机接入参数，以使所述目标站点按照所述更新后的随机接入参数发起随机接入，其中，所述目标站点为所述接入点网络覆盖范围内的全部站点或部分站点。
  2. 根据权利要求1所述的方法，其特征在于，所述接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数之前，还包括：
    接入点在网络覆盖范围内广播触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道；
    当成功接收到所述网络覆盖范围内任意一个站点通过所述随机接入信道发送的随机接入包时，所述接入点反馈确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。
  3. 根据权利要求1或2所述的方法，其特征在于，所述反馈信息包括尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值。
  4. 根据权利要求3所述的方法，其特征在于，当成功接收到所述网络覆盖范围内任意一个站点通过所述随机接入信道发送的随机接入包时，所述接入点反馈确认帧之后，还包括：
    当所述反馈信息包括尝试接入的次数时，所述接入点记录发送所述随机接 入包的站点的成功接入的次数。
  5. 根据权利要求3或4所述的方法，其特征在于，所述接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，包括：
    所述接入点获取成功接收的至少一个站点发送的随机接入包所携带的反馈信息；
    当所述反馈信息包括尝试接入的次数和成功接入的次数时，所述接入点根据所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；或者，当所述反馈信息包括尝试接入的次数时，所述接入点根据记录的所述至少一个站点的成功接入的次数和所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；或者，当所述反馈信息包括成功接入的次数与尝试接入的次数的比值时，所述接入点根据所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；
    所述当前随机接入参数包括竞争窗值或接入概率，当所述成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，所述接入点按照第一预设比例减小所述竞争窗值，或按照第二预设比例增大所述接入概率；
    当所述成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，所述接入点按照第三预设比例增大所述竞争窗值，或按照第四预设比例减小所述接入概率。
  6. 根据权利要求3或4所述的方法，其特征在于，所述接入点根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，包括：
    所述接入点获取成功接收的至少一个站点发送的随机接入包所携带的反馈信息；
    当所述反馈信息包括尝试接入的次数和成功接入的次数时，所述接入点确定所述至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值；或者，当所述反馈信息包括尝试接入的次数时，所述接入点根据记录的所 述至少一个站点的成功接入的次数和所述反馈信息确定所述至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值；
    所述接入点根据当前随机接入参数和所述每一个站点的成功接入的次数与尝试接入的次数的比值，计算竞争站点数量；
    所述接入点根据计算的所述竞争站点数量，更新当前随机接入参数。
  7. 根据权利要求6所述的方法，其特征在于，所述接入点根据计算的所述竞争站点数量，更新当前随机接入参数，包括：
    所述当前随机接入参数包括竞争窗值或接入概率，所述接入点采用所述竞争站点数量的对应数值更新所述竞争窗值；或采用所述竞争站点数量的对应数值的倒数更新所述接入概率。
  8. 一种随机接入参数的调整方法，其特征在于，包括：
    所述站点接收接入点发送的随机接入参数；
    当所述站点发起随机接入时，所述站点采用接收到的所述随机接入参数选择可随机接入的资源发送随机接入包，所述随机接入包携带所述站点的反馈信息。
  9. 根据权利要求8所述的方法，其特征在于，所述站点接收接入点广播的随机接入参数之前，还包括：
    站点接收接入点广播的触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
  10. 根据权利要求8或9所述的方法，其特征在于，所述反馈信息包括尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值。
  11. 根据权利要求10所述的方法，其特征在于，所述当所述站点发起随机接入时，所述站点采用接收到的所述随机接参数值选择可随机接入的资源发 送随机接入包之后，还包括：
    当在预设时间范围内未接收到所述接入点反馈的确认帧时，所述站点更新所述反馈信息中的所述尝试接入的次数；或者，所述站点更新所述反馈信息中的所述成功接入的次数与尝试接入的次数的比值；其中，所述确认帧用于向所述站点指示所述接入点成功接收所述随机接入包；
    所述站点向所述接入点重新发送携带更新后的反馈信息的随机接入包。
  12. 一种接入点，其特征在于，包括：
    更新单元，用于根据成功接收的至少一个站点发送的随机接入包所携带的反馈信息，更新当前随机接入参数，其中，一个随机接入包是由一个站点按照所述当前随机接入参数选择可随机接入的资源进行随机接入时所发送的，一个随机接入包携带一个站点的反馈信息；
    发送单元，用于向目标站点发送所述更新单元更新后的随机接入参数，以使所述目标站点按照所述更新后的随机接入参数发起随机接入，其中，所述目标站点为所述接入点网络覆盖范围内的全部站点或部分站点。
  13. 根据权利要求12所述的接入点，其特征在于，
    所述发送单元，还用于在网络覆盖范围内广播触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道；
    所述发送单元，还用于当成功接收到所述网络覆盖范围内任意一个站点通过所述随机接入信道发送的随机接入包时，反馈确认帧，所述确认帧用于向发送所述随机接入包的站点指示成功接收所述随机接入包。
  14. 根据权利要求12或13所述的接入点，其特征在于，所述反馈信息包括尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值。
  15. 根据权利要求14所述的接入点，其特征在于，所述接入点还包括：
    记录单元，用于当所述反馈信息包括尝试接入的次数时，在所述发送单元 在当成功接收到所述网络覆盖范围内任意一个站点通过所述随机接入信道发送的随机接入包时，反馈确认帧之后，记录发送所述随机接入包的站点的成功接入的次数。
  16. 根据权利要求14或15所述的方法，其特征在于，所述当前随机接入参数包括竞争窗值或接入概率；所述更新单元包括：
    第一获取单元，用于获取成功接收的至少一个站点发送的随机接入包所携带的反馈信息；
    第一确定单元，用于当所述反馈信息包括尝试接入的次数和成功接入的次数时，根据所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；或者，当所述反馈信息包括尝试接入的次数时，根据所述记录单元记录的所述至少一个站点的成功接入的次数和所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；或者，当所述反馈信息包括成功接入的次数与尝试接入的次数的比值时，根据所述至少一个站点的反馈信息确定成功接入的次数与尝试接入的次数的比值的平均值；
    第一更新单元，用于当所述成功接入的次数与尝试接入的次数的比值的平均值大于第一阈值时，按照第一预设比例减小所述竞争窗值，或按照第二预设比例增大所述接入概率；
    所述第一更新单元，还用于当所述成功接入的次数与尝试接入的次数的比值的平均值小于第二阈值时，按照第三预设比例增大所述竞争窗值，或按照第四预设比例减小所述接入概率。
  17. 根据权利要求14或15所述的接入点，其特征在于，所述更新单元包括：
    第二获取单元，用于获取成功接收的至少一个站点发送的随机接入包所携带的反馈信息；
    第二确定单元，用于当所述反馈信息包括尝试接入的次数和成功接入的次数时，所述接入点确定所述至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值；或者，当所述反馈信息包括尝试接入的次数时，所述接 入点根据记录的所述至少一个站点的成功接入的次数和所述反馈信息确定所述至少一个站点中每一个站点的成功接入的次数与尝试接入的次数的比值；
    计算单元，用于根据当前随机接入参数和所述每一个站点的成功接入的次数与尝试接入的次数的比值，计算竞争站点数量；
    第二更新单元，用于根据计算的所述竞争站点数量，更新当前随机接入参数。
  18. 根据权利要求17所述的接入点，其特征在于，所述当前随机接入参数包括竞争窗值或接入概率；所述第二更新单元具体用于采用所述竞争站点数量的对应数值更新所述竞争窗值；或采用所述竞争站点数量的对应数值的倒数更新所述接入概率。
  19. 一种站点，其特征在于，包括：
    接收单元，用于接收接入点发送的随机接入参数；
    发送单元，用于当所述站点发起随机接入时，采用所述接收单元接收到的所述随机接入参数选择可随机接入的资源发送随机接入包，所述随机接入包携带所述站点的反馈信息。
  20. 根据权利要求19所述的站点，其特征在于，所述接收单元还用于接收接入点广播的触发帧，所述触发帧用于指示包含一个或者多个可随机接入的资源的随机接入信道。
  21. 根据权利要求19或20所述的站点，其特征在于，所述反馈信息包括尝试接入的次数和成功接入的次数；或者，所述反馈信息包括尝试接入的次数；或者，所述反馈信息包括成功接入的次数与尝试接入的次数的比值。
  22. 根据权利要求21所述的站点，其特征在于，所述站点还包括更新单元：
    所述更新单元，用于当在预设时间范围内未接收到所述接入点反馈的确认 帧时，更新所述反馈信息中的所述尝试接入的次数；或者，所述站点更新所述反馈信息中的所述成功接入的次数与尝试接入的次数的比值；其中，所述确认帧用于向所述站点指示所述接入点成功接收所述随机接入包；
    所述发送单元，还用于向所述接入点重新发送携带更新后的反馈信息的随机接入包。
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