WO2015127761A1

WO2015127761A1 - Time division scheduling method, controller and first access point (ap)

Info

Publication number: WO2015127761A1
Application number: PCT/CN2014/083651
Authority: WO
Inventors: 汪孙节; 张兴新; 卿杰; 王学寰
Original assignee: 华为技术有限公司
Priority date: 2014-02-28
Filing date: 2014-08-04
Publication date: 2015-09-03
Also published as: CN104883708A

Abstract

The present invention relates to the technical field of communications. Provided are a time division scheduling method, a controller and a first access point (AP), which are used for solving the technical problem in the prior art that the uplink transmission of stations (STA) of other APs will be suppressed while reducing the problems of interference between APs. The time division scheduling method is applied to a controller and comprises: determining whether an STA covered by a first AP is disturbed by a second AP (S201); and according to the determination result, allocating time slices to the first AP, if the determination result is that at least one STA covered by the first AP is disturbed by the second AP, not overlapping time slices corresponding to the at least one STA of the time slices allocated to the first AP with time slices of the second AP (S202).

Description

Time division scheduling method, controller and first access node AP technical field

The present invention relates to the field of communications technologies, and in particular, to a time division scheduling method, a controller, and a first AP.

Background technique

WiFi networks have multiple types of interference, including inter-carrier interference, inter-network interference between the operator's WiFi network and other WiFi networks, and inter-system interference with other devices that use unlicensed phrases.

Normally, when the WiFi node detects that its received signal strength exceeds the CCA (Clear Channel Access) threshold, it will synchronize to this signal and decrypt the packet. After the WiFi node needs to solve the MAC packet, according to its The MAC (Media Access Control) source address and destination address know whether the MAC is sent to itself. If the packet is not sent to this node, the node is "captured" by this packet. The node cannot receive and send its own data packet during the period of being "captured", causing the interfered or interfered node PER (Packet Error Rate) to rise, and the MCS (Modulation and Coding Scheme) is reduced in performance and performance is degraded. serious.

As shown in Figure la, AP (Access Point: Access Node) 1 and AP2 are the same frequency, API sends packet 1 to STA (Station: station) 1, AP2 sends packet 2 to STA2, if packet 2 is sent first. As long as the signal strength of the data packet 2 arriving at STA1 exceeds the detection threshold of STA1, STA1 will receive the data packet 2, that is, it is captured by AP2, and STA1 cannot accurately receive the data sent by the API. In the actual scenario, the STA can receive signals from 5 to 6 intra-frequency APs, which makes the capture problem more serious.

In the prior art, the trapping problem of the hidden AP can be solved by the RTS (Request To Send)/CTS (Clear To Send) handshake protocol, as shown in FIG. 1b, which is a schematic diagram of the RTS/CTS handshake protocol. When the API needs to send data to STA1, the API sends an RTS signal to STA1 to indicate that the API needs to send data to STA1. After receiving the RTS signal, STA1 sends a CTS signal to all APs, indicating that the API can send data to STA1. Other APs pause to send data. However, when the CTS is received by the STAs of other APs, the uplink transmission of all STAs that receive the CTS is suppressed, that is, the interference between the other STAs is suppressed while the interference between the other UEs is reduced. Summary of the invention

The invention provides a time division scheduling method, a controller and a first access node 降低 to reduce the second ΑΡ ΑΡ ΑΡ 同时在在在在在在 4 4 4 4 降低降低降低降低降低降低降低降低降低Especially problem.

In a first aspect, the present invention provides a time division scheduling method, which is applied to a controller, and includes: determining whether an STA covered by a first access node is interfered by a second frame; and assigning the first frame according to the determined result a time slice, if the determined result is that at least one STA under the first coverage is interfered by the second UI, a time slice and a location corresponding to the at least one STA in the time slice allocated for the first UI There is no overlap in the second time slice.

With reference to the first aspect, in a first possible implementation manner, the allocating a time slice to the first 根据 according to the determined result includes: allocating a downlink time slice for the first ,, where The downlink time slice corresponding to the at least one STA in the allocated time slice does not overlap with the downlink time slice of the second frame; and/or the uplink time slice is allocated to the first frame, where There is no overlap between the uplink time slice corresponding to the at least one STA and the uplink time slice of the second frame in the time slice allocated by the first frame.

With reference to the first aspect, in a second possible implementation, the allocating a time slice to the first 根据 according to the determined result includes: allocating a downlink time slice and an uplink time slice for the first ,, where The downlink time slice corresponding to the at least one STA in the time slice allocated for the first frame does not overlap with the downlink time slice of the second frame, and the uplink time slice of the first frame is different from the downlink time slice.

With reference to the first aspect, in a third possible implementation, the allocating a time slice to the first 根据 according to the determined result includes: dividing the time slice into a downlink time slice and an uplink time slice; Allocating a dedicated downlink time slice for the first frame in the time slice, where the downlink time slice corresponding to the at least one STA and the downlink time slice of the second frame in the downlink time slice allocated for the first frame There is no overlap; the uplink time slice is allocated as the shared uplink time slice to the first frame, The other APs can transmit data in the uplink time slice.

With reference to the first aspect, in a fourth possible implementation, the allocating a time slice to the first AP according to the determined result includes: allocating a downlink time slice and an uplink time slice to the first AP, where The uplink time slice corresponding to the at least one STA in the time slice allocated by the first AP does not overlap with the uplink time slice of the second AP, and the uplink time slice of the first AP is different from the downlink time slice.

With reference to the first aspect, in a fifth possible implementation, the allocating a time slice to the first AP according to the determined result includes: allocating an uplink time slice and a downlink time slice to the first AP, where The downlink time slice of the first AP is the same as the uplink time slice, and the uplink time slice corresponding to the at least one STA in the time slice allocated by the first AP does not overlap with the uplink time slice of the second AP. The downlink time slice corresponding to the at least one STA does not overlap with the downlink time slice of the second AP.

With reference to the first aspect, in a sixth possible implementation, the allocating a time slice to the first AP according to the determined result includes: allocating, for the first AP, time for transmitting data of the interfered STA a slice, where the downlink time slice corresponding to the interfered STA in the time slice allocated to the first AP does not overlap with the downlink time slice of the second AP, where the first AP is used for transmission interference. There is no overlap between the uplink time slice and the downlink time slice of the STA data.

With the sixth possible implementation of the first aspect, in a seventh possible implementation, the allocating a time slice to the first AP according to the determined result, further includes: allocating the first AP a time slice for transmitting data of the uninterrupted STA, where the interfered STA is the downlink time slice corresponding to the uninterrupted STA and the downlink time slice of the interfered STA in the time slice allocated by the interfered STA There is an overlap, and the uplink time slice of the uninterrupted STA does not overlap with the downlink time slice.

With the sixth possible implementation of the first aspect, in the eighth possible implementation, the allocating a time slice to the first AP according to the determined result, further includes: allocating the first AP For sharing a time slice of data of the uninterrupted STA, the shared time slice does not overlap with the downlink time slice of the data of the first AP transmitted by the interfering STA; the shared time slice is used to transmit the Uplink data and downlink data of the interfered STA; and downlink data for transmitting the interfered STA. With reference to the first aspect or the first to fifth possible implementation manners of the first aspect, in the ninth possible implementation manner, before the assigning a time slice to the first AP according to the determined result, the method The method further includes: determining, according to the load information report reported by each AP, a duration of the time slice allocated to the first AP.

With reference to the first aspect or the first to fifth possible implementation manners of the first aspect, in the tenth possible implementation, the assigning a time slice to the first AP according to the determined result includes: The slice is divided into a controlled time slice and an uncontrolled time slice; a dedicated time slice is allocated to the first AP in the controlled time slice; and the uncontrolled time slice is allocated as the shared time slice to the The first AP, and instructing the first AP to use the uncontrolled time slice when the allocated dedicated time slice fails to meet the transmission requirement.

With reference to the first aspect, in an eleventh possible implementation manner, the method further includes: determining, according to the RSSI measurement information reported by the first AP, that the first access node AP covers the second AP Does the STA cause interference?

With reference to the eleventh possible implementation manner of the first aspect, in a twelfth possible implementation manner, determining, by the first AP, the first AP, the second AP, according to the RSSI measurement information reported by the first AP Whether the number of the RSSIs that are greater than the preset threshold is greater than the preset number, if the number of the RSSs is greater than the preset threshold, if the number of the RSSs is greater than the preset number of the preset APs, The preset number determines that the first AP interferes with the STA under the coverage of the second AP.

With reference to the twelfth possible implementation of the first aspect, in a thirteenth possible implementation, the method further includes: a time slice allocated to the first AP and an The time slices corresponding to the STAs of the first AP interference do not overlap.

In a second aspect, the present invention provides a time division scheduling method, which is applied to a first access node AP, and includes: receiving time slice information sent by a controller, where the time slice information specifically includes: the controller is the first a time slice allocated by the AP; if the at least one STA under the coverage of the first AP is interfered by the second AP, the controller corresponds to the at least one STA in the time slice allocated by the first AP The time slice does not overlap with the time slice of the second AP; based on the time slice information, the control station The first AP or the at least one part of the STA obtains data at the time slice.

With reference to the second aspect, in a first possible implementation manner, when the time slice information includes an uplink time slice corresponding to the uplink transmission, the controlling the first AP or the at least one part of the STAs at the time Obtaining data, specifically: sending a network allocation vector to the STA covered by the first AP

Uplink data transmitted by the at least one part of the STA.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, when the time slice includes an uplink time slice of the interfered STA, the controlling the first AP Or the at least one part of the STA obtains the data in the time slice, and the method includes: sending, at a beginning stage of the uplink time slice of the interfered STA, a NAV of a first power to an STA covered by the first AP, where the The one-powered NAV can be received by the uninterrupted STA under the coverage of the AP, so that the uninterrupted STA is prohibited from performing uplink transmission on the uplink time slice of the interfered STA; Or the first possible implementation manner of the first aspect, in a third possible implementation manner, when the time slice includes an uplink time slice of an uninterrupted STA, the controlling the first AP or the At least a part of the STAs obtain the data in the time slice, and the method includes: sending, to all STAs covered by the first AP, a NAV of the second power, to prohibit all STAs covered by the first AP from being in the first function. The uplink data is transmitted during the time period included in the rate of NAV;

After transmitting the NAV of the second power, sending, to all STAs covered by the first AP, control information of releasing the NAV of the first power, where the second power is greater than the first power, to release the first The NAV of the power acts on the uninterrupted STA, so that only the uninterrupted STA transmits uplink data in an uplink time slice included in the NAV of the second power; controlling the first AP in the The time slice included in the second power NAV obtains uplink data transmitted by the at least one part of the STA.

With reference to the second aspect, in a fourth possible implementation, when the time slice includes: a time slice of the interfered STA and a time slice of the uninterrupted STA, the controlling the first AP or the at least The obtaining, by the part of the STAs, the data in the time slice, the method includes: controlling, by the first AP, an uplink time slice of the interfered STA to obtain uplink data of the interfered STA; and controlling the first AP to be in the And transmitting, by the downlink time slot of the interfering STA, downlink data of the interfered STA, and controlling, by the first AP, uplink data of the uninterrupted STA in an uplink time slice of the non-interfered STA; and controlling the An AP sends downlink data of the uninterrupted STA in a downlink time slice of the uninterrupted STA.

With reference to the second aspect, in a sixth possible implementation, the method further includes: controlling a channel clean admission CCA of the first AP to be greater than a preset threshold during an uplink transmission.

According to a third aspect of the present invention, a controller is provided, including: a first determining module, configured to determine whether an STA covered by a first access node AP is interfered by a second AP; and an allocation module connected to the determining module And configured to allocate a time slice to the first AP according to the determined result, and if the determined result is that the at least one STA under the coverage of the first AP is interfered by the second AP, the first AP is allocated. The time slice corresponding to the at least one STA in the time slice does not overlap with the time slice of the second AP.

With reference to the third aspect, in a first possible implementation, the allocating module is configured to: allocate a downlink time slice to the first AP, where the at least one time slice allocated for the first AP is The downlink time slice corresponding to one STA does not overlap with the downlink time slice of the second AP; and/or the uplink time slice is allocated to the first AP, where the time slice allocated for the first AP is The uplink time slice corresponding to the at least one STA does not overlap with the uplink time slice of the second AP.

With reference to the third aspect, in a second possible implementation, the allocating module is configured to: allocate a downlink time slice and an uplink time slice to the first AP, where the time slice allocated for the first AP The downlink time slice corresponding to the at least one STA does not overlap with the downlink time slice of the second AP, and the uplink time slice of the first AP is different from the downlink time slice.

With reference to the third aspect, in a third possible implementation, the allocating module includes: a first dividing unit, configured to divide a time slice into a downlink time slice and an uplink time slice; All the downlink time slices are allocated to the first AP in the downlink time slice, where the downlink time slice corresponding to the at least one STA and the second AP in the downlink time slice allocated by the first AP There is no overlap in the downlink time slice; the sharing unit is configured to allocate the uplink time slice as a shared uplink time slice to the first AP, where other APs can transmit data in the uplink time slice.

With reference to the third aspect, in a fourth possible implementation, the allocating module is configured to: allocate a downlink time slice and an uplink time slice to the first AP, where the time slice allocated for the first AP The uplink time slice corresponding to the at least one STA does not overlap with the uplink time slice of the second AP, and the uplink time slice of the first AP is different from the downlink time slice.

With reference to the third aspect, in a fifth possible implementation, the allocating module is configured to: allocate an uplink time slice and a downlink time slice to the first AP, where the downlink time slice of the first AP is The uplink time slice is the same, the uplink time slice corresponding to the at least one STA in the time slice allocated to the first AP does not overlap with the uplink time slice of the second AP, and the downlink time slice corresponding to the at least one STA There is no overlap with the downlink time slice of the second AP.

With reference to the third aspect, in a sixth possible implementation, the allocating module is configured to: allocate, to the first AP, a time slice for transmitting data of the interfered STA, where the first AP is The downlink time slice corresponding to the interfered STA does not overlap with the downlink time slice of the second AP in the allocated time slice, and the uplink time slice and the downlink time of the data of the first AP used for transmitting the interfered STA There is no overlap in the slices.

With the sixth possible implementation of the third aspect, in a seventh possible implementation, the allocating module is further configured to: allocate, to the first AP, a time for transmitting data of an uninterrupted STA a slice, where the downlink time slice corresponding to the uninterrupted STA in the time slice allocated by the interfered STA is not overlapped with the downlink time slice of the interfered STA, and the uninterrupted STA There is no overlap between the uplink time slice and the downlink time slice.

With the sixth possible implementation of the third aspect, in an eighth possible implementation, the allocating module is further configured to: allocate, by the first AP, a share for transmitting data of an uninterrupted STA a time slot, the shared time slice is not overlapped with a downlink time slice of the data of the first AP that is transmitted by the interfering STA; the shared time slice is used to transmit uplink data and downlink data of the uninterrupted STA; And transmitting downlink data of the interfered STA.

Combining any of the first to fifth possible implementations of the third aspect or the third aspect In a ninth possible implementation manner, the controller further includes: a second determining module, configured to: according to the load reported by each AP, before the time slice is allocated to the first AP according to the determined result The information 4 indicates that the duration of the time slice is allocated to the first AP.

With reference to the third aspect, or any one of the first to the fifth possible implementation manners of the third aspect, in the tenth possible implementation, the allocating module specifically includes: a second dividing unit For dividing the time slice into a controlled time slice and an uncontrolled time slice; a second allocation unit, configured to allocate a dedicated time slice to the first AP in the controlled time slice; The control time slice is allocated to the first AP as a shared time slice, and the first AP is instructed to use the uncontrolled time slice when the allocated dedicated time slice cannot satisfy the transmission requirement.

With reference to the third aspect, in an eleventh possible implementation manner, the first determining module is further configured to: determine, according to the RSSI measurement information reported by the first AP, the first access node AP Whether the STA covered by the two APs causes interference.

With reference to the eleventh possible implementation manner of the third aspect, in the twelfth possible implementation, the first determining module is specifically configured to: according to the first AP and the first AP reported by the first AP The RSSI measurement information between the STAs determines whether the number of the RSSIs that are greater than the preset threshold is greater than the preset number. If the number of the RSSIs is greater than the preset number, the first AP is determined to cause interference to the STAs covered by the second AP.

With reference to the twelfth possible implementation manner of the third aspect, in a thirteenth possible implementation manner, the time slice allocated for the first AP and the second AP interfere with the first AP There is no overlap in the time slices corresponding to the STA.

In a fourth aspect, the present invention provides a first access node AP, including: a receiving module, configured to receive time slice information sent by a controller, where the time slice information specifically includes: the controller is the first AP a time slice of the allocation; if the at least one STA under the coverage of the first AP is interfered by the second AP, the time slice corresponding to the at least one STA in the time slice allocated by the controller for the first AP There is no overlap with the time slice of the second AP; the first control module is configured to control, according to the time slice information, the first AP or the at least one part of the STA to obtain data in the time slice.

With reference to the fourth aspect, in a first possible implementation manner, when the time slice information includes an uplink time slice corresponding to an uplink transmission, the first control module specifically includes: a first sending unit, Sending a network allocation vector NAV to the STA covered by the first AP to prohibit the at least one part

At least a portion of the uplink data transmitted by the STA.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in the second possible implementation manner, when the time slice includes an uplink time slice of the interfered STA, the first control module, specifically The second sending unit is configured to send, at a start stage of the uplink time slice of the interfered STA, a NAV of a first power to an STA covered by the first AP, where the NAV of the first power can be Receiving, by the uninterrupted STA, the AP is not received by the interfering STA, and the uninterrupted STA is prohibited from performing uplink transmission on the uplink time slice of the interfered STA. The first control unit is configured to control the first AP in the The uplink time slice of the interfering STA obtains the uplink data transmitted by the at least one part of the STA.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a third possible implementation manner, when the time slice includes an uplink time slice of an uninterrupted STA, the first control module, Specifically, the method includes: sending, by the third sending unit, a NAV of the second power to all STAs covered by the first AP, to prohibit all STAs covered by the first AP from being included in the NAV of the first power The uplink data is transmitted in the segment, and the fourth sending unit is configured to: after transmitting the NAV of the second power, send, to the STAs covered by the first AP, control information for releasing the NAV of the first power, where the second power is And greater than the first power, to cancel the action of the NAV of the first power on the uninterrupted STA, so that only the uninterrupted STA transmits the uplink time slice included in the NAV of the second power And the second control unit is configured to control, by the first AP, the uplink data that is transmitted by the at least one part of the STA in the time slice included in the second power NAV.

With reference to the fourth aspect, in a fourth possible implementation, when the time slice includes: a time slice of the interfered STA and a time slice of the uninterrupted STA, the first control module is specifically configured to: Obtaining, by the first AP, the uplink data of the interfered STA in an uplink time slice of the interfered STA; and controlling, by the first AP, the downlink of the interfered STA to send the downlink of the interfered STA Data; and controlling an uplink time slice acquisition of the first AP at the non-interfered STA And performing uplink data of the uninterrupted STA; and controlling downlink data of the first AP to send the uninterrupted STA in a downlink time slice of the uninterrupted STA.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a fifth possible implementation, the first AP further includes: a second control module, configured to The channel clean admission CCA of the first AP is greater than a preset threshold.

According to a fifth aspect, the present invention provides a controller, including: a processor, configured to determine whether an STA covered by a first access node AP is interfered by a second AP, and allocate the first AP according to the determined result. a time slice, if the determined result is that the at least one STA under the coverage of the first AP is interfered by the second AP, the time slice corresponding to the at least one STA in the time slice allocated by the first AP The time slice of the second AP does not overlap; the transmitter is connected to the processor, and is configured to send time slice information including the time slice to the first AP.

With reference to the fifth aspect, in a first possible implementation, the processor is configured to: allocate a downlink time slice to the first AP, where the at least one time slice allocated for the first AP is The downlink time slice corresponding to one STA does not overlap with the downlink time slice of the second AP; and/or the uplink time slice is allocated to the first AP, where the time slice allocated for the first AP is The uplink time slice corresponding to the at least one STA does not overlap with the uplink time slice of the second AP.

With reference to the fifth aspect, in a second possible implementation, the processor is configured to: allocate a downlink time slice and an uplink time slice to the first AP, where the time slice allocated for the first AP The downlink time slice corresponding to the at least one STA does not overlap with the downlink time slice of the second AP, and the uplink time slice of the first AP is different from the downlink time slice.

With reference to the fifth aspect, in a third possible implementation, the processor is configured to: divide a time slice into a downlink time slice and an uplink time slice; and allocate, in the downlink time slice, the first AP a dedicated downlink time slice, where the downlink time slice corresponding to the at least one STA in the downlink time slice allocated to the first AP does not overlap with the downlink time slice of the second AP; The shared uplink time slice is allocated to the first AP, where other APs can transmit data in the uplink time slice.

With reference to the fifth aspect, in a fourth possible implementation, the processor is configured to: The first AP allocates a downlink time slice and an uplink time slice, where the uplink time slice corresponding to the at least one STA in the time slice allocated to the first AP does not overlap with the uplink time slice of the second AP, where The uplink time slice of the first AP is different from the downlink time slice.

With reference to the fifth aspect, in a fifth possible implementation, the processor is configured to: allocate an uplink time slice and a downlink time slice to the first AP, where the downlink time slice of the first AP is The uplink time slice is the same, the uplink time slice corresponding to the at least one STA in the time slice allocated to the first AP does not overlap with the uplink time slice of the second AP, and the downlink time slice corresponding to the at least one STA There is no overlap with the downlink time slice of the second AP.

With reference to the fifth aspect, in a sixth possible implementation, the processor is configured to: allocate, to the first AP, a time slice for transmitting data of the interfered STA, where the first AP is The downlink time slice corresponding to the interfered STA does not overlap with the downlink time slice of the second AP in the allocated time slice, and the uplink time slice and the downlink time of the data of the first AP used for transmitting the interfered STA There is no overlap in the slices.

With reference to the sixth possible implementation manner of the fifth aspect, in a seventh possible implementation, the processor is further configured to: allocate, to the first AP, a time for transmitting data of an uninterrupted STA a slice, where the downlink time slice corresponding to the uninterrupted STA in the time slice allocated by the interfered STA is not overlapped with the downlink time slice of the interfered STA, and the uninterrupted STA There is no overlap between the uplink time slice and the downlink time slice.

With the sixth possible implementation of the fifth aspect, in an eighth possible implementation, the processor is further configured to: allocate, by the first AP, a share for transmitting data of an uninterrupted STA a time slot, the shared time slice is not overlapped with a downlink time slice of the data of the first AP that is transmitted by the interfering STA; the shared time slice is used to transmit uplink data and downlink data of the uninterrupted STA; And transmitting downlink data of the interfered STA.

With reference to the fifth aspect or the first to the fifth possible implementation manners of the fifth aspect, in a ninth possible implementation manner, the processor is further configured to: according to the determined result Before the first AP allocates the time slice, the duration of the time slice allocated to the first AP is determined according to the load information report reported by each AP. With reference to the fifth aspect or the first to the fifth possible implementation manners of the fifth aspect, in the tenth possible implementation, the processor is specifically configured to: divide the time slice into controlled a time slice and an uncontrolled time slice; assigning a dedicated time slice to the first AP in the controlled time slice; assigning the uncontrolled time slice as a shared time slice to the first AP, and The first AP is instructed to use the uncontrolled time slice when the allocated dedicated time slice fails to meet the transmission requirement.

With reference to the fifth aspect, in an eleventh possible implementation manner, the processor is further configured to: determine, according to the RSSI measurement information reported by the first AP, the first access node AP to the second AP Whether the STA under coverage causes interference.

With reference to the eleventh possible implementation manner of the fifth aspect, in a twelfth possible implementation, the processor is specifically configured to: according to the first AP and the STA reported by the first AP The RSSI measurement information is used to determine whether the number of the RSSIs that are greater than the preset threshold is greater than the preset number. If the number of the RSSIs is greater than the preset number, the first AP is determined to cause interference to the STAs covered by the second AP.

With reference to the twelfth possible implementation of the fifth aspect, in a thirteenth possible implementation, the processor is further configured to: allocate a time slice and a second AP to the first AP The time slices corresponding to the STAs interfered by the first AP do not overlap.

According to a sixth aspect, the present invention provides a first access node AP, including: a receiver, configured to receive time slice information sent by a controller, where the time slice information specifically includes: the controller is the first a time slice allocated by the AP; if the at least one STA under the coverage of the first AP is interfered by the second AP, the time corresponding to the at least one STA in the time slice allocated by the controller for the first AP The slice is not overlapped with the time slice of the second AP; the processor is connected to the receiver, and is configured to control, according to the time slice information, the first AP or the at least one part of the STA in the time slice get data.

With reference to the sixth aspect, in a first possible implementation manner, when the time slice information includes an uplink time slice corresponding to an uplink transmission, the processor is specifically configured to: send, by using a transmitter, the first AP The covered STA sends a network allocation vector NAV to prohibit the at least one part of the STA from performing uplink transmission within a time period included in the NAV, thereby controlling an uplink time of the at least one part of the STAs other than the time period included in the NAV Transmitting uplink data; passing the receiver in addition to the NAV packet The uplink time slice outside the included time period obtains uplink data transmitted by the at least one part of the STA.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, when the time slice includes an uplink time slice of the interfered STA, the processor is specifically used to Transmitting, by the transmitter, the NAV of the first power to the STA covered by the first AP, where the NAV of the first power can be covered by the AP, in the initial stage of the uplink time slice of the interfered STA Received by the interfering STA, thereby prohibiting the uninterrupted STA from performing uplink transmission on the uplink time slice of the interfered STA; obtaining, by the receiver, the at least one part of the STA transmission in an uplink time slice of the interfered STA Upstream data.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a third possible implementation, when the time slice includes an uplink time slice of an uninterrupted STA, the processor is specifically used. Transmitting, by the sender, the NAV of the second power to all STAs covered by the first AP, to prevent all STAs covered by the first AP from transmitting during the time period included in the NAV of the first power Uplink data; and after transmitting the NAV of the second power, transmitting, by the transmitter, control information of the first power release NAV to all STAs covered by the first AP, where the second power is greater than the first a power to cancel the effect of the NAV of the first power on the uninterrupted STA, so that only the uninterfered STA transmits uplink data in an uplink time slice included in the NAV of the second power; The receiver obtains uplink data transmitted by the at least one part of the STA in a time slice included in the second power NAV.

With reference to the sixth aspect, in a fourth possible implementation, when the time slice includes: a time slice of the interfered STA and a time slice of the uninterrupted STA, the processor is specifically configured to: Receiving, by the receiver, uplink data of the interfered STA in an uplink time slice of the interfered STA; and transmitting downlink data of the interfered STA by using the transmitter in a downlink time slice of the interfered STA; Obtaining, by the receiver, uplink data of the uninterrupted STA in an uplink time slice of the non-interfering STA; and transmitting, by the transmitter, the uninterrupted STA in a downlink time slice of the uninterrupted STA Downstream data.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a fifth possible implementation, the processor is further configured to: control, in an uplink transmission, a channel of the first AP Dry The net admission CCA is greater than the preset threshold.

The beneficial effects of the present invention are as follows:

In the present invention, first determining whether the STA under the coverage of the first AP is interfered by the second AP, and then allocating a time slice to the first AP according to the determination result, wherein if it is determined that at least one STA under the coverage of the first AP is determined to be The second AP interference, the time slice corresponding to at least one STA in the time slice allocated by the first AP does not overlap with the time slice of the second AP, that is, when the time slice is allocated for the first AP, only the time slice is allocated. The time slice of the second AP that is allocated to interfere with it is different, but the time slice of other APs is not affected, so that the interference problem of the second AP to the first AP is reduced, and the impact is not affected. The technical effect of data transmission of an AP that does not interfere with the first AP. DRAWINGS

Figure la is a schematic diagram of interference problems between APs in the prior art;

Figure lb is a schematic diagram of the RTS/CTS protocol in the prior art;

2 is a flowchart of a time division scheduling method according to a first aspect of the present invention;

3 is a schematic diagram of interaction between an AP and an AC in a time division scheduling method according to a first aspect of the present invention; FIG. 4 is a schematic diagram of seven APs in a time division scheduling method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an interference relationship between multiple APs in a time division scheduling method according to an embodiment of the present invention; FIG. 6 is a schematic diagram of an AP reporting load report information to an AC in a time division scheduling method according to a first aspect of the present invention;

FIG. 7 is a networking diagram of a Wifi in a time division scheduling method according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram showing a time allocation of an uncontrolled time slice allocated in a time division scheduling method according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of allocating a downlink time slice in a time division scheduling method according to an embodiment of the present invention; FIG. 10 is a schematic diagram of a time division scheduling method in which an uplink time slice and a downlink time slice of each AP are not overlapped and are not A schematic diagram of the control time slice at the end of the downlink time slice of all APs;

FIG. 11 is a schematic diagram of the time-division scheduling method in which the uplink time slice and the downlink time slice of each AP are not overlapped, and the uncontrolled time slice is located between downlink time slices of each AP; 12 is a schematic diagram of an overlap between an uplink time slice of each AP and a downlink time slice of all APs in a time division scheduling method according to an embodiment of the present invention;

13 is a schematic diagram of controlling an uplink time slice of each AP in a time division scheduling method according to an embodiment of the present invention;

14 is a schematic diagram of an uplink time slice and a downlink time slice in the same time slice in the time division scheduling method according to an embodiment of the present invention;

15 is a first schematic diagram of a time division scheduling method for allocating time slices separately between an interfered STA and an uninterrupted STA according to an embodiment of the present invention;

16 is a second schematic diagram of a time division scheduling method for allocating time slices separately between an interfered STA and an uninterrupted STA according to an embodiment of the present invention;

17 is a flowchart of a time division scheduling method according to a second aspect of the embodiment of the present invention;

18 is a schematic diagram of a positional relationship between an uninterrupted STA and an interfered STA in a time division scheduling method according to an embodiment of the present invention;

FIG. 19 is a schematic diagram of assigning a time slice to an inner ring STA and an outer ring STA, respectively, in a time division scheduling method according to an embodiment of the present invention; FIG.

20 is a structural diagram of a controller according to a third aspect of the embodiment of the present invention;

21 is a structural diagram of a first AP according to a fourth aspect of the present invention;

Figure 22 is a structural diagram of a controller according to a fifth aspect of the embodiment of the present invention;

Figure 23 is a structural diagram of a first AP according to a sixth aspect of the embodiment of the present invention. detailed description

In the prior art, the technical problem of the data transmission of the STA of the other AP is affected when the problem of the interference of the hidden AP is solved by the RTS/CTS protocol, and the technical solution proposed by the embodiment of the present application provides a time division. The scheduling method is applied to the controller, and includes: determining whether the STA covered by the first access node AP is interfered by the second AP; and assigning a time slice to the first AP according to the determined result, if the determined result is the first AP coverage The at least one STA in the next AP is interfered by the second AP, and the time slice corresponding to at least one STA in the time slice allocated for the first AP does not overlap with the time slice of the second AP. That is to say, when the time slice is allocated for the first AP, only the time slice is allocated and interferes with it. The time slice of the second AP is different, but does not affect the time slice of other APs. Therefore, the interference problem of the second AP to the first AP is reduced, and the interference to the first AP is not affected. The technical effect of the AP's data transmission;

Moreover, since the data transmission between the APs is controlled by the time slice, the air interface resources for transmitting the RTS/CTS are saved.

The main implementation principles, specific implementation manners, and the corresponding beneficial effects that can be achieved by the technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

In a first aspect, the embodiment of the present invention provides a time division scheduling method, which is applied to a controller, for example, an AC (Access Controller: Access Controller), an AP, etc., for convenience of introduction, the following will be controlled. The AC is used as an example. Referring to Figure 2, the method includes the following steps:

Step S201: determining whether the STA under the coverage of the first access node AP is interfered by the second AP. Step S202: Allocating a time slice to the first AP according to the determined result, if the determined result is at least one STA under the coverage of the first AP If the second AP interferes, the time slice corresponding to at least one STA in the time slice allocated for the first AP does not overlap with the time slice of the second AP.

Optionally, in step S201, it is determined whether the STA that is covered by the first AP is interfered by the second AP, specifically: determining, according to the RSSI (Received Signal Strength Indicator) measurement information reported by the first AP, Whether the AP interferes with the STA under the coverage of the second AP, because the interference between the first AP and the second AP is relative, that is, if the first AP interferes with the STA under the coverage of the second AP, the second AP is indicated. The STAs that are covered by the first AP are also interfered with by the STAs that are covered by the second AP.

Please refer to FIG. 3 , which is a schematic diagram of interaction between multiple APs and ACs: API to APn will transmit RSSI measurement information of other APs to the AC, and the AC allocates time slices to each AP through RSSI measurement information, and then will include time slices. The slice information is transmitted to the corresponding AP.

Optionally, determining, according to the RSSI measurement information between the first AP and the STA that is reported by the first AP, whether the number of RSSIs greater than the preset threshold is greater than a preset number, and determining that the first AP is the second if the number is greater than the preset number. The STA under the coverage of the AP caused interference. Assume that, as shown in FIG. 4, there are 7 APs, respectively: API ~ ΑΡ7, and each AP detects RSSI measurement information of the beacon channel with other APs, taking the first AP as an API as an example, and supposing that the API detects AP2/3. /4/5 RSSI measurement information, and within 10s, the API receives the RSSI measurement information of AP2 exceeding the threshold is 21, the RSSI measurement information of the received AP3 exceeding the threshold is 10, and the RSSI of AP4 exceeding the threshold is received. The measurement information is 21. The RSSI measurement information of the received AP5 exceeding the threshold is 23, and the preset number is 15, and the APs that have interference with the API are determined to be AP2, AP4, and AP5.

In a specific implementation process, the first AP may measure the RSSI measurement information of the data frame, the management frame, or the control frame of each STA, and the first AP may determine whether the STA is the AP by using the RSSI measurement information of any of the foregoing frames. Captured, for example: If the first AP receives a probe request management frame (the probe request management frame is one of the management frames) that does not cover the STA, the probe request frame includes the MAC address of the STA, Then, the MAC address of the STA is reported to the AC, and the AC can find the serving AP of the STA based on the MAC address of the STA, so that it can be determined whether the first AP has the STA that captures the second AP.

In this case, even if the first AP and the second AP are hidden APs, the first AP can receive the RSSI measurement information of the STA of the second AP, thereby determining whether the hidden second AP is correct. An AP has the technical effect of interference.

Further, the method further includes: the time slice allocated for the first AP does not overlap with the time slice corresponding to the STA interfered by the first AP in the second AP.

Specifically, when the time slice is allocated to the first AP, the time slices allocated by the time slice of the second AP may not overlap; but because the STA of the second AP is the first There is no interference in the AP. Therefore, in order not to affect the data transmission of the STAs, the time slice allocated by the STAs interfered by the first AP in the second AP may not overlap with the time slice of the first AP.

In step S102, the correspondence between the multiple APs shown in FIG. 5 is taken as an example. To ensure that the time slices of the APs that are in interference are staggered, the time slice used by each AP is: AP1/AP3 uses time slice a; AP2/AP5 uses time slice b; AP4/AP6 uses time slice c. Optionally, before the allocating the time slice to the first AP according to the determined result, the method further includes: determining, according to the load information report reported by each AP, a duration for allocating the time slice to the first AP. For example, please refer to Figure 6, every preset time interval, for example: 10s, 20s, etc., each

The AP uploads the load information to the AC. The AP load information includes the following contents: 1) the time slice usage ratio of the AP; 2) the service buffer load of the AP; 3) the air interface duty cycle; 4) the request to increase or decrease the time. At least one content of the slice resource indication, after receiving the AP load information uploaded by each AP, the AC re-allocates the time slice to each AP and delivers the time slice to the AP.

On the other hand, if there are 20 STAs in AP1/AP3 and only 10 STAs in AP4/AP6, and the service requirements of each STA are the same, the time slice length of a/b/c can be configured as 8ms/6ms/4ms. That is the first

The AP allocates a longer time slice.

Since the time slice is allocated to the first AP through the load information, the allocated time slice can satisfy the load requirement of the first AP.

For example, in step S102, the AC allocates time slice signaling to the first AP, including the following content:

1) scheduling control type (including downlink time fragmentation, uplink time fragmentation, uplink and downlink time fragmentation);

2) Whether to classify users (yes or no);

3) Time slice format (including the time slice divided into several segments, each time slice length, and the type of each time slice);

4) If the scheduling user in 2) is YES, carry the uninterrupted STA and the interfered STA list.

Optionally, the time slot is allocated to the first AP according to the determined result, and the method includes:

The time slice is divided into a controlled time slice and an uncontrolled time slice;

Allocating a dedicated time slice to the first AP in the controlled time slice; assigning the uncontrolled time slice as a shared time slice to the first AP, and instructing the first AP to use when the allocated dedicated time slice cannot satisfy the transmission requirement Uncontrolled time slice.

For example, referring to the networking diagram of Wifi in FIG. 7, Wifi has three channels that do not overlap each other in the 2.4G frequency band, namely: channel 1, channel 6, channel 11 (ie, corresponding to FIG. 7, b, c). The channel where AP(a), AP(b), and AP(c) are located uses channel 6, and the first AP is AP (a) as an example. Line introduction.

The time slice distributions of AP(a), AP(b), and AP(c) are shown in FIG. 8, wherein the controlled time slices are further divided into: downlink time slices and non-downlink time slices, and downlink time slice transmission. The downlink data is not transmitted in the non-downlink time slice. In this case, the downlink data transmission of AP(a), AP(b), and AP(c) does not overlap, but is not For the time slice, each AP (for example, AP(a)) is not used for data transmission. Only the controlled time slice allocated by each AP (for example, the downlink time slice corresponding to the downlink or the uplink time slice corresponding to the uplink, etc.) If you cannot meet the transmission requirements, you need to use uncontrolled time slices for data transmission.

Since an uncontrolled time slice is allocated for use when the controlled time slice allocated for the first AP (for example, AP(a)) does not satisfy the transmission requirement, timely transmission of data of the first AP can be ensured, and Even if the controlled time slice does not satisfy the transmission requirement, the controlled time slice is not immediately adjusted, so that the technical effect of reducing the processing load is achieved.

In step S102, the at least one STA that is covered by the first AP may be all the STAs covered by the first AP, or may only include the interfered STAs that the first AP is interfered by the second AP, and is based on at least a part of the STAs, thereby being the first The time slice allocated by the AP is also different. Two of them are introduced below. Of course, in the specific implementation process, the following two situations are not limited.

First, at least one STA may be all STAs of the first AP. In this case, the allocated time slice may be further divided into multiple cases. Several of them will be listed below, of course, in implementation. In the process, it is not limited to the following situations.

1 Allocating a time slice to the first AP according to the determined result, including:

A downlink time slice is allocated to the first AP, where the downlink time slice corresponding to at least one STA in the time slice allocated for the first AP does not overlap with the downlink time slice of the second AP.

For example, the downlink time slice corresponding to all STAs in the first AP does not overlap with the downlink time slice of the second AP, and the non-downstream time slices of the first AP and the second AP are not controlled. As shown in FIG. 9, the uplink data of the first AP may be transmitted in a whole time slice or in a partial time slice, which is not limited in the embodiment of the present invention. Since the downlink time slice of all the STAs of the first AP does not overlap with the downlink time slice of the second AP, the second AP pair is prevented. The first AP produces a technical effect of downlink interference.

The signaling content of the scheduling time allocated by the AC to the AP(a) is as follows: The first AP is the AP (a) and the controller is the AC.

1) The scheduling control type is: downlink time fragmentation;

2) Whether the classified users are classified as: No;

3) Time slice format (3 segments, 12ms/8ms/8ms, available/unavailable/unavailable).

For the format of another time slice, please continue to refer to FIG. 8. The time slice format considers that the load of the first AP is dynamically changed, so the AC reserves a certain length of uncontrolled time slice for the first AP to use. Avoid adjusting the time slice used by the first AP due to dynamic changes in business requirements.

Correspondingly, the AC allocates time slice signaling content to the AP(a) as follows:

1) The scheduling control type is: downlink time fragmentation;

2) Whether the classified users are classified as: No;

3) Time slice format (4 segments, 8ms/8ms/8ms/6ms, available/unavailable/unavailable/try not to use). Optionally, the time slice is allocated to the first AP according to the determined result, including:

An uplink time slice is allocated to the first AP, where the uplink time slice corresponding to at least one STA in the time slice allocated for the first AP does not overlap with the uplink time slice of the second AP.

For example, the possible implementation of the AP (a) is as follows: There is no overlap, and the downlink time slice is used to schedule downlink data, that is, there is no overlap between the downlink time slices of AP(a), AP(b), and AP(c), and the downlink time slice and uplink time of the first AP. There is no overlap in the film;

After the time slice information including the time slice is sent by the AC to the first AP, the first AP sends a NAV (Network Allocation Vector) indication to the STA at the beginning of the downlink time slice, and the content indicated by the NAV is the length of time. The role of the NAV indication is for the node to tell the other nodes how long I need to use the channel after competing to the channel, preventing other network nodes from competing for the channel during this period, and receiving the MAC frame of the network node (including The AP and the STA are not in the time indicated by the NAV field of the MAC frame. In the embodiment of the present invention, the NAV indication is sent by the first AP to the STA, that is, within the time length corresponding to the NAV indication. The STA of the first AP no longer enters Line uplink transmission. The NAV indication is carried, for example, by a CTS-to-self signal, that is, by transmitting a CTS to itself carrying an NVA indication.

In order to ensure that there is no uplink transmission in the downlink time slice, the length of the NAV indication is usually the length of the downlink time slice, that is, the NAV indication does not function again during the non-downstream time slice, so that the non-downlink time slice transmission Upstream data.

And an uncontrolled time slice is allocated on the time slice of FIG. 10, and the time slice for the first AP allocation cannot be used when the transmission requirement cannot be met.

Correspondingly, AC allocation AP (a) time slice signaling includes the following:

1) The scheduling control type is: uplink time fragmentation;

2) Whether the classified users are classified as: No;

3) Time slice format (downstream 4 segments, 5ms/5ms/5ms/10ms, available/unavailable/unavailable/try not to use, up 4 segments, 5ms/5ms/5ms/10ms, not available/try not to use/try not to use/ Available).

Another possible implementation manner is that, as shown in FIG. 11, the difference between the allocation of the time slice and the allocation of the time slice of FIG. 10 is that the uncontrolled time slice is in the AP(a), AP in FIG. (b), AP(c) corresponds to the downlink time slice, and the uncontrolled time slice in FIG. 11 is dispersed between the time slices of each AP.

In the above solution, there is no overlap between the downlink time slice and the uplink time slice of the first AP. In this case, in addition to ensuring that the second AP does not have downlink interference to the STA of the first AP, it can also ensure that there is no interference between the uplink transmission and the downlink transmission of the first AP.

Optionally, the time slice is allocated to the first AP according to the determined result, including:

The time slice is divided into a downlink time slice and an uplink time slice;

Dedicating a downlink time slice to the first AP in the downlink time slice, where the downlink time slice corresponding to at least one STA in the downlink time slice allocated by the first AP does not overlap with the downlink time slice of the second AP;

The uplink time slice is allocated as a shared uplink time slice to the first AP, where other APs can transmit data in the uplink time slice.

For example, please refer to FIG. 12, the downlink time slice is further divided into a downlink transmission time slice and a non-downlink transmission. The time slice, where the downlink transmission time slices of AP(a), AP(b), and AP(c) are not overlapped; and AP(a), AP(b), and AP(c) are included in the receiving AC. After the time slice information of the time slice, the AP (a), the AP (b), and the AP (c) send a NAV indication to the STA at the beginning of the downlink time slice, and the NAV indicates that the corresponding duration is the duration of the downlink time slice, thereby prohibiting The STA sends the uplink data in the duration corresponding to the downlink time slice, and when the time is the uplink time slice, the time length indicated by the NAV is released, thereby ending the suppression of the uplink, and thus the AP(a), the AP(b), and the AP ( c) Both uplink data are transmitted during this time period. According to the data transmission, the non-downlink transmission time slice does not transmit data. In this case, after the downlink data of the second AP can be prevented from being downlinked to the STA of the first AP, the uplink data pair of all APs can be prevented from being first. Downlink interference of the STA of the AP.

2 Allocating a time slice to the first AP according to the determined result, including:

For example, refer to FIG. 13 , or take AP ( a ) as the first AP as an example, where AP(a) does not perform uplink transmission in the time slice corresponding to the NAV, but performs uplink transmission in other time slices, thereby allocating slices. And the uplink time slices of the AP(a), the AP(b), and the AP(c) are not overlapped, and the uplink transmission is controlled.

After the uplink time slice is sent to the AP (a), the AP(a) performs uplink transmission in the uplink time slice, and after the uplink time slice of the AP(a) ends, sends a CTS-to- to the STA under its coverage. The self signal, which carries the NAV indication, prohibits the STA from performing uplink transmission on the non-upstream time slice.

In the foregoing solution, the uplink time slice corresponding to the at least one STA in the time slice allocated by the first AP does not overlap with the uplink time slice of the second AP, so that the second AP is prevented from generating the at least one STA of the first AP. The technical effect of uplink interference.

Allocating a downlink time slice and an uplink time slice for the first AP, where the uplink time slice corresponding to at least one STA in the time slice allocated for the first AP does not overlap with the uplink time slice of the second AP, the first The uplink time slice of the AP is different from the downlink time slice.

The above solution can prevent the second AP from generating uplink interference to the at least one STA of the first AP, and can prevent interference between the uplink transmission and the downlink transmission of the first AP.

3 Allocating a time slice to the first AP according to the determined result, including:

Allocating a downlink time slice for the first AP, where there is no overlap between the downlink time slice corresponding to at least one STA and the downlink time slice of the second AP in the time slice allocated for the first AP;

In this case, the uplink time slice and the downlink time slice of the first AP may be overlapped or may not be overlapped, which is not limited in this embodiment of the present invention.

In the foregoing solution, the uplink time slice corresponding to the at least one STA of the first AP does not overlap with the uplink time slice of the second AP, and the downlink time slice corresponding to the at least one STA of the first AP and the downlink time of the second AP There is no overlap in the slices, so the technical effect of preventing the second AP from uplink interference and downlink interference to at least one STA of the first AP is achieved.

Allocating an uplink time slice and a downlink time slice for the first AP, where the downlink time slice of the first AP is the same as the uplink time slice, and the uplink time slice corresponding to the at least one STA and the second AP of the time slice allocated by the first AP The uplink time slice does not overlap, and the downlink time slice corresponding to the at least one STA does not overlap with the downlink time slice of the second AP.

For example, referring to FIG. 14, the time slice is divided into four segments in each cycle, wherein the first three segments are controlled time slices, and the latter segment is an uncontrolled time slice. For AP(a), the first The segment is a transmission time slice (transmitting both uplink data and downlink data), the second and third segments are non-transmission time slices (no data transmission), and the fourth segment is a time slice in which the transmission time slice cannot satisfy the transmission requirement. AP (b) and AP(c) are similar.

After the time slice information including the time slice is sent to the AP (a), it performs uplink transmission and downlink transmission in the transmission time slice, and after the transmission time slice ends, sends a NAV indication to the corresponding STA, the NAV indication corresponding to The duration is the duration corresponding to the second and third time slices (ie, non-transmission time slices), thereby suppressing AP(a) from performing uplink transmission in the second and third time slices. In the above solution, the uplink time slice and the downlink time slice of each first AP are the same time slice, thereby reducing the overhead of designing the time slice.

The second type, at least a part of the STAs are the interfered STAs, and allocate a time slice to the first AP according to the determined result, including:

A time slice for the data of the interfered STA is allocated to the first AP, where the downlink time slice corresponding to the interfered STA and the downlink time slice of the second AP in the time slice allocated for the first AP do not overlap, the first The uplink time slice of the AP for transmitting data of the interfered STA does not overlap with the downlink time slice.

For example, the first STA detects that the RSSI of the first STA is greater than a preset threshold, for example: if the second AP detects the probe requesting the frame of the STA (of course, it may also be a data frame, The control frame or the like, which is not limited in the embodiment of the present invention, is based on the source MAC address carried in the probe request management frame, and determines that the STA is not the STA served by the STA, but is the STA served by the first AP. The RSSI measurement information corresponding to the STA is reported to the AC (please refer to FIG. 10), and the AC classifies the STA as the interfered STA under the coverage of the first AP, and the AC will be the interfered STA under the coverage of the first AP. The outer STAs are classified as uninterrupted STAs.

With the above solution, in addition to being able to prevent the second AP from interfering with the interfered STAs covered by the first AP, it is also possible to not affect the data transmission of other STAs covered by the first AP, and can prevent the interfered STA of the first AP. Interference between uplink and downlink transmissions.

Referring to FIG. 15, a possible implementation manner of allocating a time slice to an interfered STA, where the time slice is divided into a downlink time slice for transmitting the interfered STA and a downlink time slice for transmitting the uninterrupted STA, where AP(a), The downlink time slices of the interfering STAs transmitted by the AP(b) and the AP(c) are not overlapped, and the downlink time slice of the interfering STA is transmitted for transmitting the downlink data of the interfered STA, and the downlink time slice of the uninterrupted STA is used for transmitting. The downlink data of the uninterrupted STA is transmitted.

AC Assignment AP(a) time slice signaling includes the following:

The scheduling control type is: uplink and downlink time fragmentation;

Whether to classify the scheduled users as: Yes;

Time slice format (downstream 3 segments, 10ms/10ms/10ms, interfered/not interfered/not interfered, on Line 3, 10ms/10ms/10ms, interfered/not interfered/not interfered);

The undisturbed STA list Listl { } , the interfered STA list List2 { }.

Optionally, the time slice is allocated to the first AP according to the determined result, and the method further includes:

A time slice for transmitting data of the uninterrupted STA is allocated to the first AP, where the downlink time slice corresponding to the uninterrupted STA in the time slice allocated for the first AP does not overlap with the downlink time slice of the interfered STA, The uplink time slice of the uninterrupted STA does not overlap with the downlink time slice.

For example, please continue to refer to FIG. 15. The transmission phase of the AP(a) is terminated by an arrow at the beginning of the interfering STA time slice, indicating that the uplink of the interfered STA of the AP(a) is prohibited during the downlink time slice period of transmitting the interfered STA. Transmission, and the transmission of AP(a) is not interrupted. The start phase of the downlink time slice of the STA also has an arrow indicating that the transmission of the uninterrupted STA downlink time slice prohibits the uplink transmission of the uninterrupted STA, thereby being able to stagger the interfered STA. Uplink transmission and downlink transmission, and uplink transmission and downlink transmission of the uninterrupted STA, in this case, it is possible to prevent interference between the uplink transmission and the downlink transmission of the interfered STA, and uplink transmission of the uninterrupted STA The interference between the downlink transmission and the downlink transmission can also prevent the downlink transmission of the uninterrupted STA from interfering with the downlink transmission of the interfered STA.

Allocating a shared time slice for transmitting data of the uninterrupted STA to the first AP, the shared time slice and the downlink of the first AP are not overlapped by the downlink time slice of the data of the interfered STA; the shared time slice is used for transmission without interference Uplink data and downlink data of the STA; and downlink data of the interfered STA.

For example, referring to FIG. 16, in each period, the time slice can be divided into a controlled time slice and an uncontrolled time slice, and the controlled time slice can be further divided into a downlink time slice and a non-downlink time of the interfered STA. sheet. The time period for transmitting the downlink data of the interfered STA and the uplink data transmission, and causing the first AP to transmit the uplink data and the downlink data of the interfered STA, in the time period corresponding to the downlink time slice of the interfered STA. There is no overlap; for the shared time slice, it can be used to transmit uplink data and downlink data of the uninterrupted STA, and can also be used for transmitting the uplink data of the interfered STA.

In a second aspect, based on the same inventive concept, an embodiment of the present invention provides a time division scheduling method, which is applied to an access node AP. Referring to FIG. 17, the method includes:

Step S171: receiving time slice information sent by the controller, where the time slice information specifically includes: a controller a time slice allocated to the first AP; if the at least one STA under the coverage of the first AP is interfered by the second AP, the time slice corresponding to the at least one STA and the time of the second AP in the time slice allocated by the controller for the first AP There is no overlap in the film;

Step S172: Control the first AP or at least a part of the STA to obtain data in the time slice based on the time slice information.

In a specific implementation, in step S172, if the time slice is a downlink time slice, the first AP may directly send downlink data to the STA in the time slice corresponding to the downlink time slice, and if the time slice is an uplink time slice, because the uplink is uplink. The time slice is invisible to the STA, so it is necessary to control the uplink transmission of the STA through the first AP.

Optionally, when the time slice information includes the uplink time slice corresponding to the uplink transmission, controlling the first AP or at least a part of the STA to obtain data in the time slice, specifically:

Transmitting a network allocation vector NAV to the STAs covered by the first AP, so as to prohibit at least a part of the STAs from performing uplink transmission in a time period included in the NAV, so as to control at least a part of the STAs to transmit uplink data in an uplink time slice other than the time period included in the NAV. ; Uplink data for the loss.

For example, the time slice outside the uplink time slice allocates NAV to the STA, thereby prohibiting the body from being controlled. This has been described above, and thus will not be described herein.

Optionally, the time slice includes: when the time slice includes the uplink time slice of the interfered STA, the first AP or the at least one part of the STA may be controlled to obtain data in the time slice in multiple manners, and two control modes are listed below. Of course, in the specific implementation process, it is not limited to the following two methods.

The first type, when the time slice includes the uplink time slice of the interfered STA, controlling the first AP or at least a part of the STA to obtain data in the time slice, specifically includes:

At the beginning of the uplink time slice of the interfered STA, the NAV of the first power is sent to the STA covered by the first AP, and the NAV of the first power can be received by the uninterrupted STA under the coverage of the AP, thereby prohibiting the uninterrupted STA. Performing uplink transmission on the uplink time slice of the interfered STA; Controlling, by the first AP, the uplink data transmitted by at least a part of the STAs in the uplink time slice of the interfered STA.

For example, referring to FIG. 18, the STA covered by the first AP usually includes a central STA and an edge STA, and the interfered STA is usually an edge STA, and the corresponding time slice is an uplink time slice for transmitting the interfered STA, as shown in FIG. 19 . As shown, the first power NAV1 can be sent to the STA, and the first power is low, so that the NVA1 can only be captured by the inner ring STA and cannot be captured by the outer ring STA, thereby suppressing the uplink transmission of the inner ring STA based thereon. , so that the outer circle user can perform uplink transmission during the time period. The technical effect of reducing the uplink interference of the uninterrupted STA to the interfered STA is achieved by the above solution.

Optionally, when the time slice includes the uplink time slice of the uninterrupted STA, controlling the first AP or at least a part of the STAs to obtain data in the time slice, specifically:

And transmitting, by the STAs of the first AP, the NAV of the second power, to prevent all STAs covered by the first AP from transmitting the uplink data in the time period included in the NAV of the first power;

After transmitting the NAV of the second power, sending, to all STAs covered by the first AP, control information of the NAV for releasing the first power, where the second power is greater than the first power, to cancel the role of the NAV of the first power on the uninterrupted STA So that only the uninterrupted STA transmits the uplink data in the uplink time slice included in the NAV of the second power;

And controlling, by the first AP, the time slice included in the second power NAV to obtain uplink data of at least a part of the STA transmission.

For example, referring to FIG. 19, the first AP sends CTS-to-self with the second power to all the STAs covered by the first AP, and the signal power is relatively high and the MCS is relatively low, ensuring that all STAs can receive All the STAs are prohibited from performing uplink transmission during the NAV1; then the first AP sends the CF-End with the first power to the first AP to cover the uninterrupted STA, and cancels the NAV1 transmission limitation of the uninterrupted STA, and the signal power is relatively low. The MCS is relatively high, and only the uninterrupted STA can receive and correctly decode, so that the uninterrupted STA performs uplink transmission in the time period corresponding to NAV1. The technical effect of reducing the uplink interference of the interfered STA on the uninterrupted STA is achieved by the above solution.

The second method, when the time slice includes: a time slice of the interfered STA and a time slice of the uninterrupted STA, controlling the first AP or at least a part of the STA to obtain data in the time slice, specifically: Controlling, by the first AP, the uplink data of the interfered STA in the uplink time slice of the interfered STA;

Controlling, by the first AP, the downlink data of the interfered STA in the downlink time slice of the interfered STA; and, for example, referring to FIG. 16, the downlink time slice of the interfered STA (that is, the downlink transmission in FIG. 16 is In the time slice of the interfering STA, the data packet of the interfered STA is first acquired by the interfered STA list List2{}, and then the data packet is transmitted to all STAs under the first AP, and since the transmitted data packet only has the interfered STA Packet, therefore, the uninterrupted STA will not get its corresponding data packet;

In the non-transmission time slice, the data packet of the uninterrupted STA is acquired through the uninterrupted STA list List1 {}, and then transmitted, and the data packet is received by the interfering STA and the uninterrupted STA, but because it is not the interfered STA. Packet, so the interfered STA cannot obtain its corresponding data packet;

The same is true for the uplink transmission. If the time slice is only the uplink time slice of the interfered STA, both the interfered STA and the uninterrupted STA will send the uplink data, but the first AP will only obtain the uplink data of the interfered STA; Only for the uplink time slice of the uninterrupted STA, the first AP only acquires the uplink data of the uninterrupted STA.

Optionally, the method further includes:

During the uplink transmission, the channel clear access CCA (Clear Channel Access) that controls the first AP is greater than a preset threshold.

For example, in general, the signal strength of the STA served by the first AP detected by the first AP is higher, and the signal strength of the STA that is not served by the first AP is lower. By increasing the CCA, the first STA can be lowered. The probability that an AP will be interfered by its serving STA.

Optionally, the method further includes:

In the process of performing uplink transmission, reducing the transmit power of the STA, in this case, for the first The STA covered by the AP, although it reduces the transmission power, but its signal strength can still be higher than the CCA, so that it can still be received by the first AP, and for the STA not covered by the first AP, after reducing the transmission power, its signal The strength may be lower than the CCA and thus cannot be captured by the first AP, thereby further reducing the interference of the second AP to the at least one STA of the first AP.

In a second aspect, an embodiment of the present invention provides a controller. Referring to FIG. 20, the method includes:

The first determining module 200 is configured to determine whether the STA covered by the first access node AP is interfered by the second AP;

The allocating module 201 is connected to the determining module, configured to allocate a time slice to the first AP according to the determined result, and if the determined result is that the at least one STA under the coverage of the first AP is interfered by the second AP, the first AP is allocated. The time slice corresponding to at least one STA in the time slice does not overlap with the time slice of the second AP.

Optionally, an allocation module 201 is configured to:

A downlink time slice is allocated to the first AP, where the downlink time slice corresponding to at least one STA in the time slice allocated for the first AP does not overlap with the downlink time slice of the second AP; and/or

Optionally, an allocation module 201 is configured to:

A downlink time slice and an uplink time slice are allocated to the first AP, where the downlink time slice corresponding to at least one STA in the time slice allocated for the first AP does not overlap with the downlink time slice of the second AP, and the uplink time of the first AP The slice is different from the downstream time slice.

Optionally, the allocating module 201 includes:

a first dividing unit, configured to divide the time slice into a downlink time slice and an uplink time slice;

a first allocation unit, configured to allocate a dedicated downlink time slice to the first AP in the downlink time slice, where the downlink time slice corresponding to the at least one STA and the downlink time of the second AP in the downlink time slice allocated by the first AP There is no overlap in the film;

The sharing unit is configured to allocate the uplink time slice as a shared uplink time slice to the first AP, where other APs can transmit data in the uplink time slice. Optionally, the allocating module 201 is configured to:

The downlink time slot and the uplink time slice are allocated to the first AP, where the uplink time slice corresponding to at least one STA in the time slice allocated for the first AP does not overlap with the uplink time slice of the second AP, and the uplink time of the first AP The slice is different from the downstream time slice.

Optionally, an allocation module 201 is configured to:

Optionally, the allocating module 201 is further configured to:

Allocating a time slice for transmitting the data of the uninterrupted STA to the first AP, where the downlink time slice corresponding to the uninterrupted STA and the downlink time slice of the interfered STA in the time slice allocated by the interfered STA for the first AP are not There is overlap, and there is no overlap between the uplink time slice of the uninterrupted STA and the downlink time slice.

Optionally, the allocating module 201 is further configured to:

Optionally, the controller further includes: a second determining module, configured to determine, according to the load information report reported by each AP, the duration of the time slice allocated to the first AP, before the time slice is allocated to the first AP according to the determined result.

Optionally, the allocating module specifically includes:

a second dividing unit, configured to divide the time slice into a controlled time slice and an uncontrolled time slice; a second allocation unit, configured to allocate a dedicated time slice to the first AP in the controlled time slice; assign the uncontrolled time slice as the shared time slice to the first AP, and indicate that the first AP is in the allocated dedicated time Uncontrolled time slices are used when the slice cannot meet the transmission requirements.

Optionally, the first determining module 200 is further configured to:

And determining, according to the RSSI measurement information reported by the first AP, whether the first access node AP interferes with the STA under the coverage of the second AP.

Optionally, the first determining module 200 is specifically configured to:

Determining, according to the RSSI measurement information between the first AP and the STA that is reported by the first AP, whether the number of RSSIs greater than the preset threshold is greater than a preset number, and if the number is greater than the preset number, determining that the first AP is covered by the second AP. The STA caused interference.

Optionally, there is no overlap between the time slice allocated by the first AP and the time slice corresponding to the STA interfered by the first AP in the second AP.

In a fourth aspect, based on the same inventive concept, an embodiment of the present invention provides a first access node AP. Referring to FIG. 21, the method includes:

The receiving module 210 is configured to receive time slice information sent by the controller, where the time slice information specifically includes: a time slice allocated by the controller to the first AP; if at least one STA covered by the first AP is interfered by the second AP, then controlling The time slice corresponding to at least one STA in the time slice allocated by the first AP does not overlap with the time slice of the second AP;

The first control module 211 is configured to control, according to the time slice information, the first AP or at least a part of the STA to obtain data in a time slice.

Optionally, when the time slice information includes the uplink time slice corresponding to the uplink transmission, the first control module 211 specifically includes:

a first sending unit, configured to send a network allocation vector NAV to the STA covered by the first AP, to prevent at least a part of the STA from performing uplink transmission in a time period included in the NAV, thereby controlling at least a part of the first obtaining unit, for the first AP

Have at least part of the uplink data transmission STA _£ Optionally, when the time slice includes the uplink time slice of the interfered STA, the first control module 211 specifically includes:

a second sending unit, configured to send, at a beginning stage of the uplink time slice of the interfered STA, a NAV of the first power to the STA covered by the first AP, where the NAV of the first power can be covered by the AP without interference first control And a unit, configured to control, by the first AP, uplink data that is transmitted by at least a part of STAs in an uplink time slice of the interfered STA.

Optionally, when the time slice includes an uplink time slice of the uninterrupted STA, the first control module 211 specifically includes:

a third sending unit, configured to send a second power NAV to all STAs covered by the first AP, to prevent all STAs covered by the first AP from transmitting uplink data in a time period included in the NAV of the first power;

a fourth sending unit, configured to send, after transmitting the NAV of the second power, control information of the first power release NAV to all STAs covered by the first AP, where the second power is greater than the first power, to release the NAV of the first power Acting on the uninterrupted STA, so that only the uninterrupted STA transmits the uplink data in the uplink time slice included in the NAV of the second power;

And a second control unit, configured to control, by the first AP, the uplink data included in the second power NAV to obtain uplink data transmitted by at least a part of the STA.

Optionally, when the time slice includes: a time slice of the interfered STA and a time slice of the uninterrupted STA, the first control module 211 is specifically configured to:

Controlling, by the first AP, the uplink data of the interfered STA in the uplink time slice of the interfered STA; and

Controlling, by the first AP, the downlink data of the interfered STA in the downlink time slice of the interfered STA; and Optionally, the first AP further includes:

The second control module is configured to control the channel clear admission CCA of the first AP to be greater than a preset threshold during the uplink transmission.

In a fifth aspect, based on the same inventive concept, an embodiment of the present invention provides a controller. Referring to FIG. 22, the method includes:

The processor 220 is configured to determine whether the STA covered by the AP of the first access node is interfered by the second AP;

Assigning a time slice to the first AP according to the determined result, if the determined result is that the at least one STA covered by the first AP is interfered by the second AP, the time slice corresponding to the at least one STA in the time slice allocated by the first AP is The time slice of the second AP does not overlap;

The transmitter 221 is connected to the processor 220, and is configured to send time slice information including a time slice to the first AP.

Optionally, the processor 220 is configured to:

The time slice is divided into a downlink time slice and an uplink time slice;

Allocating the uplink time slice as a shared uplink time slice to the first AP, where the uplink time slice Other APs can transmit data.

Optionally, the processor 220 is configured to:

Optionally, the processor 220 is further configured to:

Before the time slice is allocated to the first AP according to the determined result, the time interval for allocating the time slice to the first AP is determined according to the load information reported by each AP.

Optionally, the processor 220 is specifically configured to: The time slice is divided into a controlled time slice and an uncontrolled time slice;

Optionally, the processor 220 is further configured to:

Optionally, the processor 220 is specifically configured to:

Optionally, the processor 220 is further configured to: the time slice allocated for the first AP does not overlap with the time slice corresponding to the STA interfered by the first AP in the second AP.

In a sixth aspect, based on the same inventive concept, an embodiment of the present invention provides a first access node AP. Referring to FIG. 23, the method includes:

The receiver 230 is configured to receive time slice information sent by the controller, where the time slice information specifically includes: a time slice allocated by the controller to the first AP; if at least one STA covered by the first AP is interfered by the second AP, then controlling The time slice corresponding to at least one STA in the time slice allocated by the first AP does not overlap with the time slice of the second AP;

The processor 231 is connected to the receiver 230, and is configured to control, according to the time slice information, the first AP or at least a part of the STAs to obtain data in the time slice.

Optionally, when the time slice information includes an uplink time slice corresponding to the uplink transmission, the processor 231 is specifically configured to:

Transmitting, by the transmitter, the network allocation vector NAV to the STAs covered by the first AP, to prohibit at least a part of the STAs from performing uplink transmission during the time period included in the NAV, thereby controlling at least a part of the STAs to be Uplink data transmitted.

Optionally, when the time slice includes an uplink time slice of the interfered STA, the processor 231 is specifically configured to:

At the beginning of the uplink time slice of the interfered STA, the transmitter transmits the NAV of the first power to the STA covered by the first AP, and the NAV of the first power can be received by the uninterrupted STA under the coverage of the AP, thereby prohibiting the The interfered STA performs uplink transmission on the uplink time slice of the interfered STA;

At least a portion of the uplink data transmitted by the STA is obtained by the receiver in the uplink time slice of the interfered STA.

Optionally, when the time slice includes an uplink time slice of the uninterrupted STA, the processor 231 is specifically configured to:

Transmitting, by the transmitter, the NAV of the second power to all STAs covered by the first AP, to prevent all STAs covered by the first AP from transmitting uplink data in a time period included in the NAV of the first power; and transmitting the second power After the NAV, the NAV control information of the first power is sent by the transmitter to all the STAs covered by the first AP, and the second power is greater than the first power, so as to cancel the effect of the NAV of the first power on the uninterrupted STA, so that only And causing the uninterrupted STA to transmit uplink data in an uplink time slice included in the NAV of the second power;

At least a portion of the uplink data transmitted by the STA is obtained by the receiver at the time slice included in the second power NAV.

Optionally, when the time slice includes: a time slice of the interfered STA and a time slice of the uninterrupted STA, the processor 231 is specifically configured to:

Obtaining uplink data of the interfered STA by the receiver in the uplink time slice of the interfered STA; and transmitting downlink data of the interfered STA by the transmitter in the downlink time slice of the interfered STA; and uplinking by the receiver on the non-interfered STA The time slice obtains uplink data of the uninterrupted STA;

The downlink data of the uninterrupted STA is transmitted by the transmitter in the downlink time slice of the uninterrupted STA. Optionally, the processor 231 is further configured to:

During the uplink transmission, the channel clear admission CCA of the first AP is controlled to be greater than a preset threshold. One or more embodiments of the present invention have at least the following beneficial effects:

In the embodiment of the present invention, first determining whether the STA under the coverage of the first AP is interfered by the second AP, and then allocating a time slice to the first AP according to the determination result, where, if at least one STA under the coverage of the first AP is determined, If the second AP interferes, the time slice corresponding to the at least one STA in the time slice allocated by the first AP does not overlap with the time slice of the second AP, that is, when the time slice is allocated for the first AP, only The time slice is allocated differently from the time slice of the second AP that interferes with it, but does not affect the time slice of other APs, so that the interference problem of the second AP to the first AP is reduced, and The technical effect of data transmission of the AP that does not interfere with the first AP is affected; and, since the data transmission between the APs is controlled by the time slice, the air interface resource for transmitting the RTS/CTS is saved.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is applicable to one or more computer usable storage media (including but not limited to disk storage, including computer usable program code,

The form of a computer program product implemented on a CD-ROM, optical storage, etc.).

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and combinations of flow and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, A series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing such that instructions executed on a computer or other programmable device are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of a function specified in a box or multiple boxes.

While the preferred embodiment of the invention has been described, the subject matter Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications The spirit and scope of the embodiments of the present invention. Thus, it is intended that the present invention cover the modifications and the modifications of the embodiments of the invention.

Claims

Rights request

1. A time-division scheduling method, applied to a controller, characterized by including:

Determine whether the STA covered by the first access node AP is interfered by the second AP;

The first AP is allocated a time slice according to the determination result. If the determination result is that at least one STA covered by the first AP is interfered by the second AP, then the time slice allocated to the first AP is There is no overlap between the time slice corresponding to the at least one STA and the time slice of the second AP.

2. The method of claim 1, wherein allocating a time slice to the first AP according to the determined result includes:

Allocate a downlink time slice to the first AP, wherein the downlink time slice corresponding to the at least one STA in the time slice allocated to the first AP does not overlap with the downlink time slice of the second AP; and/ or

Allocate an uplink time slice to the first AP, wherein the uplink time slice corresponding to the at least one STA in the time slice allocated to the first AP does not overlap with the uplink time slice of the second AP.

3. The method of claim 1, wherein allocating a time slice to the first AP according to the determined result includes:

Allocate a downlink time slice and an uplink time slice to the first AP, wherein the downlink time slice corresponding to the at least one STA in the time slice allocated to the first AP does not exist with the downlink time slice of the second AP. overlap, the uplink time slice of the first AP is different from the downlink time slice.

4. The method of claim 1, wherein allocating a time slice to the first AP according to the determined result includes:

Divide time slices into downstream time slices and uplink time slices;

A dedicated downlink time slice is allocated to the first AP within the downlink time slice, where the downlink time slice corresponding to the at least one STA in the downlink time slice allocated to the first AP is the same as that of the second AP. There is no overlap in the downlink time slices;

The uplink time slice is allocated to the first AP as a shared uplink time slice, where other APs can transmit data within the uplink time slice.

5. The method of claim 1, wherein allocating a time slice to the first AP according to the determined result includes:

Allocate a downlink time slice and an uplink time slice to the first AP, where the uplink time slice corresponding to the at least one STA in the time slice allocated to the first AP does not exist with the uplink time slice of the second AP. overlap, the uplink time slice of the first AP is different from the downlink time slice.

6. The method of claim 1, wherein allocating a time slice to the first AP based on the determined result includes:

Allocate an uplink time slice and a downlink time slice to the first AP, wherein the downlink time slice and uplink time slice of the first AP are the same, and the time slice allocated to the first AP corresponds to the at least one STA The uplink time slice does not overlap with the uplink time slice of the second AP, and the downlink time slice corresponding to the at least one STA does not overlap with the downlink time slice of the second AP.

7. The method of claim 1, wherein allocating a time slice to the first AP based on the determined result includes:

The first AP is allocated a time slice for transmitting the data of the interfered STA, where, there is no overlap in the uplink time slice, and the uplink time slice of the first AP for transmitting the data of the interfered STA is equal to There is no overlap in downlink time slices.

8. The method of claim 7, wherein allocating a time slice to the first AP according to the determined result further includes:

The first AP is allocated a time slice for transmitting data of the non-interferenced STA, wherein the downlink time slice corresponding to the non-interferenced STA among the time slices allocated by the interfered STA to the first AP is the same as the downlink time slice of the non-interferenced STA. The downlink time slices of the interfered STA do not overlap, and the uplink time slices and downlink time slices of the uninterferenced STA do not overlap.

9. The method of claim 7, wherein allocating a time slice to the first AP according to the determined result further includes:

Allocate a shared time slice for the first AP to transmit the data of the uninterrupted STA, and the shared time slice does not overlap with the downlink time slice of the first AP for transmitting the data of the interfered STA; The shared time slice is used to transmit uplink data and downlink data of the non-interferenced STA; and transmit downlink data of the interfered STA.

10. The method according to any one of claims 1 to 6, characterized in that, before allocating a time slice to the first AP according to the determined result, the method further includes:

According to the load information report reported by each AP, the duration of the time slice allocated to the first AP is determined.

11. The method according to any one of claims 1 to 6, characterized in that allocating a time slice to the first AP according to the determined result specifically includes:

Divide time slices into controlled time slices and uncontrolled time slices;

Allocate a dedicated time slice to the first AP in the controlled time slice; assign the uncontrolled time slice to the first AP as a shared time slice, and instruct the first AP to assign The uncontrolled time slice is used when the dedicated time slice cannot meet the transmission demand.

12. The method of claim 1, wherein the method further includes:

According to the RSSI measurement information reported by the first AP, it is determined whether the first access node AP causes interference to the STAs covered by the second AP.

13. The method of claim 12, characterized in that, based on the RSSI measurement information reported by the first AP, determining whether the first access node AP causes interference to the STA covered by the second AP, specifically includes:

According to the RSSI measurement information between the first AP and the STA reported by the first AP, it is determined whether the number of RSSIs greater than the preset threshold is greater than the preset number, and if it is greater than the preset number, it is determined that the first AP pair The STAs covered by the second AP cause interference.

14. The method of claim 13, wherein the method further includes: the time slice allocated to the first AP corresponds to the time in the second AP that is interfered by the STAs interfered by the first AP. There is no overlapping of slices.

15. A time division scheduling method, applied to the first access node AP, characterized in that it includes: receiving time slice information sent by a controller, where the time slice information specifically includes: the controller is the first The time slice allocated by the AP; if at least one STA covered by the first AP is interfered by the second AP, the controller will pair the at least one STA in the time slice allocated by the first AP. There is no overlap between the corresponding time slice and the time slice of the second AP;

Based on the time slice information, the first AP or at least some STAs are controlled to obtain data in the time slice.

16. The method of claim 15, wherein when the time slice information includes an uplink time slice corresponding to uplink transmission, the control of the first AP or at least part of the STAs at the time The data obtained from the film are as follows:

Send a network allocation vector NAV to the STAs covered by the first AP to prohibit the at least one

Part of the uplink data transmitted by the STA.

17. The method according to claim 15 or 16, characterized in that, when the time slice includes the uplink time slice of the interfered STA, the control of the first AP or at least part of the STAs at the time The data obtained from the film include:

At the beginning of the uplink time slice of the interfered STA, NAV of the first power is sent to the STA covered by the first AP, and the NAV of the first power can be received by the uninterferenced STA covered by the AP. Receive, thereby prohibiting the non-interferenced STA from performing uplink transmission in the uplink time slice of the interfered STA;

Control the first AP to obtain uplink data transmitted by at least part of the STA in the uplink time slice of the interfered STA.

18. The method according to claim 15 or 16, characterized in that, when the time slice includes an uplink time slice of uninterrupted STAs, the control of the first AP or at least a part of the STAs in the Time slices obtain data, specifically including:

Send the NAV of the second power to all STAs covered by the first AP to prohibit all STAs covered by the first AP from transmitting uplink data within the time period included in the NAV of the first power; before sending the After the NAV of the second power is released, control information for releasing the NAV of the first power is sent to all STAs covered by the first AP, and the second power is greater than the first power, so as to release the NAV. The effect of the NAV of the first power on the non-interferenced STA, so that the non-interferenced STA only transmits uplink data in the uplink time slice included in the NAV of the second power;

Control the first AP to obtain at least part of the uplink data transmitted by the STA in the time slice included in the second power NAV.

19. The method of claim 15, wherein when the time slice includes: a time slice of an interfered STA and a time slice of an uninterferenced STA, the controlling the first AP or the at least Some STAs obtain data in the time slice, specifically including:

Control the first AP to obtain the uplink data of the interfered STA in the uplink time slice of the interfered STA; and

Control the first AP to send the downlink data of the interfered STA in the downlink time slice of the interfered STA; and

Control the first AP to obtain the uplink data of the non-interferenced STA in the uplink time slice of the non-interferenced STA; and

The first AP is controlled to send the downlink data of the non-interferenced STA in the downlink time slice of the non-interferenced STA.

20. The method according to any one of claims 15 or 16, characterized in that the method further includes: during the uplink transmission process, controlling the channel clean access CCA of the first AP to be greater than a preset threshold.

21. A controller, characterized in that it includes:

The first determination module is used to determine whether the STA covered by the first access node AP is interfered by the second AP;

An allocation module, connected to the determination module, configured to allocate a time slice to the first AP according to the determination result, if the determination result is that at least one STA covered by the first AP is interfered by the second AP 4 In particular, the time slice corresponding to the at least one STA in the time slice allocated to the first AP does not overlap with the time slice of the second AP.

22. The controller according to claim 21, wherein the allocation module is configured to: allocate a downlink time slice to the first AP, wherein the time slice allocated to the first AP is described in There is no overlap between the downlink time slice corresponding to at least one STA and the downlink time slice of the second AP; and / or

23. The controller according to claim 21, wherein the allocation module is configured to: allocate a downlink time slice and an uplink time slice to the first AP, wherein: is the time allocated to the first AP The downlink time slice corresponding to the at least one STA in the slice does not overlap with the downlink time slice of the second AP, and the uplink time slice of the first AP is different from the downlink time slice.

24. The controller of claim 21, wherein the allocation module includes: a first dividing unit, used to divide the time slice into a downlink time slice and an uplink time slice;

The first allocation unit is configured to allocate a dedicated downlink time slice to the first AP within the downlink time slice, where: is the downlink time corresponding to the at least one STA in the downlink time slice allocated to the first AP There is no overlap between the downlink time slice and the second AP's downlink time slice;

A sharing unit configured to allocate the uplink time slice to the first AP as a shared uplink time slice, wherein other APs can transmit data within the uplink time slice.

25. The controller according to claim 21, wherein the allocation module is configured to: allocate a downlink time slice and an uplink time slice to the first AP, wherein: is the time allocated to the first AP The uplink time slice corresponding to the at least one STA in the slice does not overlap with the uplink time slice of the second AP, and the uplink time slice of the first AP is different from the downlink time slice.

26. The controller according to claim 21, wherein the allocation module is configured to: allocate an uplink time slice and a downlink time slice to the first AP, wherein the downlink time slice of the first AP Same as the uplink time slice, the uplink time slice corresponding to the at least one STA in the time slice allocated to the first AP does not overlap with the uplink time slice of the second AP, and the downlink time corresponding to the at least one STA There is no overlap between the downlink time slice and the downlink time slice of the second AP.

27. The controller of claim 21, wherein the allocation module is configured to: allocate to the first AP a time slice for transmitting data of the interfered STA, where is the row time There is no overlap in slices, and the uplink time of the first AP used to transmit the data of the interfered STA There is no overlap between the downlink time slice and the downlink time slice.

28. The controller of claim 27, wherein the allocation module is further configured to: allocate to the first AP a time slice for transmitting data of an uninterrupted STA, wherein the interfered STA There is no overlap between the downlink time slice corresponding to the non-interferenced STA and the downlink time slice of the interfered STA in the time slice allocated to the first AP, and the uplink time slice and downlink time slice of the non-interferenced STA There is no overlap.

29. The controller of claim 27, wherein the allocation module is further configured to: allocate a shared time slice for the first AP to transmit data of uninterrupted STAs, the shared time There is no overlap between the downlink time slice and the first AP's downlink time slice for transmitting the data of the interfered STA; the shared time slice is used to transmit the uplink data and downlink data of the uninterrupted STA; and transmitting the interfered STA downstream data.

30. The controller according to any one of claims 21 to 26, characterized in that the controller further includes:

The second determination module is configured to determine the duration of the time slice allocated to the first AP based on the load information report reported by each AP before allocating the time slice to the first AP according to the determination result.

31. The controller according to any one of claims 21 to 26, wherein the distribution module specifically includes:

The second dividing unit is used to divide the time slice into controlled time slices and uncontrolled time slices;

The second allocation unit is configured to allocate a dedicated time slice to the first AP in the controlled time slice; allocate the uncontrolled time slice to the first AP as a shared time slice, and indicate that the first AP The first AP uses the uncontrolled time slice when the allocated dedicated time slice cannot meet the transmission demand.

32. The controller according to claim 21, characterized in that the first determination module is also used to:

33. The controller according to claim 32, characterized in that the first determination module is specifically used for: According to the RSSI measurement information between the first AP and the STA reported by the first AP, it is determined whether the number of RSSIs greater than the preset threshold is greater than the preset number, and if it is greater than the preset number, it is determined that the first AP pair The STAs covered by the second AP cause interference.

34. The controller according to claim 33, wherein the time slice allocated to the first AP does not overlap with the time slice corresponding to the STA in the second AP that is interfered by the first AP.

35. A first access node AP, characterized by including:

A receiving module, configured to receive time slice information sent by the controller. The time slice information specifically includes: the time slice allocated by the controller to the first AP; if at least one STA covered by the first AP is The second AP interferes, then the time slice corresponding to the at least one STA in the time slice allocated by the controller to the first AP does not overlap with the time slice of the second AP;

A first control module, configured to control the first AP or at least some STAs to obtain data in the time slice based on the time slice information.

36. The first AP according to claim 35, wherein when the time slice information includes an uplink time slice corresponding to uplink transmission, the first control module specifically includes:

The first sending unit is configured to send the network allocation vector NAV to the STA covered by the first AP,

data;

The first obtaining unit is configured for the first AP to obtain the uplink data transmitted by the at least part of the STA in an uplink time slice other than the time period included in the NAV.

37. The first AP according to claim 35 or 36, wherein when the time slice includes the uplink time slice of the interfered STA, the first control module specifically includes:

The second sending unit is configured to send the NAV of the first power to the STA covered by the first AP at the beginning of the uplink time slice of the interfered STA, and the NAV of the first power can be covered by the AP. received by the uninterferenced STA, thereby prohibiting the uninterferenced STA from performing uplink transmission in the uplink time slice of the interfered STA;

The first control unit is used to control the first AP to obtain Obtain the at least part of the uplink data transmitted by the STA.

38. The method of claim 35 or 36, wherein when the time slice includes an uplink time slice of an uninterrupted STA, the first control module specifically includes:

The third sending unit is configured to send the NAV of the second power to all STAs covered by the first AP to prohibit all STAs covered by the first AP from transmitting within the time period included in the NAV of the first power. Uplink data;

The fourth sending unit is configured to send control information for releasing NAV of the first power to all STAs covered by the first AP after sending the NAV of the second power, and the second power is greater than the first power. , to eliminate the effect of the NAV of the first power on the uninterrupted STA, so that only the second control unit is used to control the first AP to obtain The at least part of the uplink data transmitted by the STA.

39. The first AP according to claim 35, wherein when the time slice includes: a time slice of an interfered STA and a time slice of an uninterferenced STA, the first control module is specifically configured to: : Control the first AP to obtain the uplink data of the interfered STA in the uplink time slice of the interfered STA; and

40. The first AP according to any one of claims 35 or 36, characterized in that, the first AP further includes:

The second control module is used to control the channel clean access CCA of the first AP to be greater than the preset threshold during the uplink transmission process.