Wireless network access method and device

Abstract

The present invention provides a wireless network access method and device. The method comprises: in a wireless network supporting multiple channel access methods, an access point maintains a service-based or site-based service connection state with a site, and changes the channel access method used by the service-based or site-based service connection by negotiating with the site or sending control information to the site.

Description

[0001] This application is a divisional application of the Chinese patent application with application number "201510641446.7", application date "September 30, 2015", and title "Access method and device for wireless network". Technical Field

[0002] The present invention relates to the field of communications, and in particular to a method and device for accessing a wireless network. Background Art

[0003] At present, with the continuous expansion of the WLAN industry, the WLAN network load is also increasing. With the increase in the number of users, the dense network scenarios cause the WLAN network efficiency to drop significantly. Simply increasing the transmission rate cannot solve this problem. Multi-user parallel transmission as an alternative technology to solve network efficiency has attracted widespread attention and research.

[0004] In the prior art, multi-user parallel transmission technologies include MU-MIMO (Multi-User Multiple-Input Multiple-Output) technology, OFDMA (Orthogonal Frequency Division Multiple Access) technology, etc. MU-MIMO distributes multiple layers of MIMO to multiple sites, and uses spatial multiplexing technology to improve the utilization of time and frequency. The introduction of OFDMA technology enables multiple sites to frequency-division multiplex the entire bandwidth, which can better utilize the results of frequency selection between sites to improve frequency utilization, and can reduce the proportion of contention resource overhead for small packet transmission in the entire transmission, thereby improving time utilization.

[0005] Multiple non-AP STAs (stations) in a WLAN send data to an AP (access point) at the same time, which is generally called uplink multi-user (UL MU) transmission, where a user is equivalent to a station. Alternatively, an AP sends data to multiple non-AP STAs at the same time, which is called downlink multi-user (DL MU) transmission. The typical uplink and downlink multi-user transmission frame exchange sequence is as follows: Figure 1 shown.

[0006] UL MU transmission requires the AP to perform uplink resource allocation and trigger uplink synchronous transmission, which is triggered by sending a trigger frame or carrying a trigger information field in a radio frame. The trigger frame or trigger information field carries the scheduling information of the station, such as the identification information of the station, the time and frequency resource information used by the station for uplink transmission, and the time and frequency offset calibration information of the station. After the AP sends the trigger frame or the trigger information field, the station receives the trigger frame or the trigger information field. If its identification information is carried in it, it means that it is scheduled in this UL MU transmission. If it has data to send, it prepares and synchronizes according to the time and frequency offset calibration information indicated by the AP, and sends it on the allocated time and frequency resources.

[0007] In the prior art, when STA establishes a service with AP, it determines its access mode through negotiation. The existing access modes include: scheduling access mechanism, contention access mechanism and a hybrid mechanism of the two mechanisms. In the process of AP triggering uplink synchronous transmission, the station adopts the access mode of scheduling access mechanism. Before AP sends a trigger frame, STA will report its buffer status. AP will allocate resources according to the received station buffer status and schedule the station to send uplink data once or multiple times. When AP schedules resources for STA, AP can update the corresponding buffer status of the station in real time according to the scheduling information.

[0008] However, if the STA uses the competitive access mechanism to send data while waiting to be scheduled by the AP, the AP may not receive the message in real time and may not be able to update the corresponding buffer status of the STA in real time, resulting in inaccuracy in the subsequent scheduling of the AP, or even empty scheduling, resulting in resource waste. Although the station can solve the above problems by reporting its own buffer status in real time, real-time reporting of its own buffer status will greatly increase the network load. In addition, when the access method of the station changes, it needs to cut off the established service connection, and then re-establish the service and negotiate with the AP. This update method is not flexible and reduces the efficiency of the MAC layer. Therefore, how to improve resource utilization and MAC layer efficiency is an urgent problem to be solved. Summary of the invention

[0009] The present invention provides a wireless network access method and device, and aims to solve the technical problem of how to improve the utilization rate of resources and the flexibility of the access mode update method.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0011] A method for accessing a wireless network, comprising:

[0012] In a wireless network that supports multiple channel access methods, the access point maintains a service-based or site-based service connection state with the site, and changes the channel access method used by the above-mentioned service-based or site-based service connection by negotiating with the site or sending control information to the site.

[0013] The channel access mode includes a contention-based access mode EDCA, a data transmission mode based on access point triggering or polling, and an uplink multi-user data transmission mode based on access point triggering or polling.

[0014] The control information includes information indicating a channel access method for a service or service type.

[0015] The control information also includes one or more time information for using the channel access method: cycle, start delay, and duration.

[0016] The control information also includes a priority level or a scheduling access mode for using the channel access method.

[0017] The control information further includes at least one of the following information: service type information, aggregation indication, user priority, service information response strategy and scheduling information.

[0018] The access point maintaining the service-based or site-based service connection state with the station refers to the parameters of the station maintaining the existing service connection with the access point, wherein the parameters include the connection identification number.

[0019] The control information used to change the channel access mode also includes:

[0020] access mode information specifying whether a specified service or a specified service type of the site adopts a contention access mechanism; and / or,

[0021] access mode information specifying whether a designated service or designated service type of the site adopts a scheduling access mechanism; and / or,

[0022] Specify whether the specified service or specified service type of the site adopts a hybrid access mode information of a scheduling access mechanism and a contention access mechanism; and / or,

[0023] When the current channel access mode is a service or service type of a scheduling access mechanism, access mode information of whether the designated service or designated service type of the site adopts a contention access mechanism; and / or,

[0024] When the current channel access mode is a hybrid access mode of a scheduling access mechanism and a contention access mechanism, access mode information that prohibits the use of a contention access mechanism for a designated service or designated service type of the site;

[0025] The scheduling access mechanism is a data transmission mode based on access point triggering or polling, or an uplink multi-user data transmission mode based on access point triggering or polling.

[0026] The method for negotiating with the site refers to a method for performing frame interactive negotiation by establishing a service ADDTS request frame and an establishing service ADDTS response frame.

[0027] The control information is sent via a public downlink broadcast message, or via a unicast message sent to the site.

[0028] The public downlink broadcast information is a beacon frame, a probe response frame or a service change frame.

[0029] The unicast message is a service establishment ADDTS response frame or a service change frame carrying service specification TSPEC information.

[0030] A method for accessing a wireless network, comprising:

[0031] The station receives control information sent by the access point, determines a changed channel access mode according to the control information, and sends data of the designated service or service type according to the changed channel access mode.

[0032] The station determines the changed channel access mode according to the control information, including:

[0033] The station receives the control information, wherein the control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A; after receiving the control information, the station establishes a service with the access point, the station requests the channel access mode of the service to be mode B, the access point responds that the channel access mode of the service is mode A, and the channel access mode used by the station when sending data of the service is mode A; or,

[0034] The station receives the control information, wherein the control information includes that the channel access method allowed by the designated service or designated service type of the station is method A; after receiving the control information, the station establishes a service with the access point, the station requests that the channel access method for the service is method B, and the channel access method for the service responded by the access point is method B, then the station uses channel access method A or method B when sending data of the service.

[0035] The station determines the changed channel access mode according to the control information, including:

[0036] When the station establishes a service with the access point, the station requests that the channel access mode of the service is mode B, and the access point responds to the control information, wherein the control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A, then the channel access mode used by the station when sending data of the service is mode A; or,

[0037] When the station establishes a service with the access point, the station requests that the channel access mode for the service be mode A, and the access point responds to the control information, wherein the control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A, then the channel access mode used by the station when sending data of the service is mode A.

[0038] The station determines the changed channel access mode according to the control information, including:

[0039] The station negotiates and determines that the channel access mode of the service is mode B when establishing the service with the access point. If the access point sends the control information after the service establishment is completed, and the channel access mode allowed by the designated service or designated service type of the station in the control information is mode A, then the station uses the channel access mode A or mode B when sending data of the service.

[0040] Wherein, the method A and the method B are the same or different channel access mechanisms; wherein the channel access mechanism includes:

[0041] Scheduling access mechanism;

[0042] Uplink contention access mechanism;

[0043] A hybrid mechanism of scheduling access mechanism and uplink contention access mechanism.

[0044] The scheduling access mechanism is a data transmission mode based on access point triggering or polling, or an uplink multi-user data transmission mode based on access point triggering or polling.

[0045] Wherein, the method further comprises:

[0046] The station determines whether to access the wireless network where the access point is located according to a designated service of the station or a channel access method allowed by a designated service type; and / or,

[0047] The site determines whether to enable the designated service or designated service type according to the channel access mode allowed by the designated service or designated service type of the site.

[0048] A wireless network access device, comprising:

[0049] The change module is used to maintain the service-based or site-based service connection status with the site in a wireless network that supports multiple channel access methods, and to change the channel access method used by the above-mentioned service-based or site-based service connection by negotiating with the site or sending control information to the site.

[0050] The channel access mode includes a contention-based access mode EDCA, a data transmission mode based on access point triggering or polling, and an uplink multi-user data transmission mode based on access point triggering or polling.

[0051] The control information includes information indicating a channel access method for a service or service type.

[0052] The control information also includes one or more time information for using the channel access method: cycle, start delay, and duration.

[0053] The control information also includes a priority level or a scheduling access mode for using the channel access method.

[0054] The control information further includes at least one of the following information: service type information, aggregation indication, user priority, service information response strategy and scheduling information.

[0055] The access point maintaining the service-based or site-based service connection state with the station refers to the parameters of the station maintaining the existing service connection with the access point, wherein the parameters include the connection identification number.

[0056] The control information used to change the channel access mode also includes:

[0057] access mode information specifying whether a specified service or a specified service type of the site adopts a contention access mechanism; and / or,

[0058] access mode information specifying whether a designated service or designated service type of the site adopts a scheduling access mechanism; and / or,

[0059] Specify whether the specified service or specified service type of the site adopts a hybrid access mode information of a scheduling access mechanism and a contention access mechanism; and / or,

[0060] When the current channel access mode is a service or service type of a scheduling access mechanism, access mode information of whether the designated service or designated service type of the site adopts a contention access mechanism; and / or,

[0061] When the current channel access mode is a hybrid access mode of a scheduling access mechanism and a contention access mechanism, access mode information that prohibits the use of a contention access mechanism for a designated service or designated service type of the site;

[0062] The scheduling access mechanism is a data transmission mode based on access point triggering or polling, or an uplink multi-user data transmission mode based on access point triggering or polling.

[0063] The device for negotiating with the site refers to a device for performing frame interaction negotiation through an establish service ADDTS request frame and an establish service ADDTS response frame.

[0064] The control information is sent via a public downlink broadcast message, or via a unicast message sent to the site.

[0065] The public downlink broadcast information is a beacon frame, a probe response frame or a service change frame.

[0066] The unicast message is a service establishment ADDTS response frame or a service change frame carrying service specification TSPEC information.

[0067] A wireless network access device, comprising:

[0068] A receiving module, used for receiving control information sent by an access point;

[0069] A determination module, used to determine a changed channel access mode according to the control information;

[0070] The sending module is used to send the data of the specified service or service type according to the changed channel access mode.

[0071] Wherein, the determination module is used for:

[0072] The control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A; after receiving the control information, a service is established with the access point, and the channel access mode of the service is requested to be mode B, and the channel access mode of the service responded by the access point is mode A, then the channel access mode used when sending data of the service is determined to be mode A; or,

[0073] The control information includes that the channel access method allowed by the designated service or designated service type of the site is method A; after receiving the control information, a service is established with the access point, and the channel access method of the service is requested to be method B. The channel access method of the service responded by the access point is method B, and then it is determined whether to use the channel access method A or method B when sending data of the service.

[0074] Wherein, the determination module is used for:

[0075] When the station establishes a service with the access point, the channel access mode requested for the service is mode B, and the access point responds to the control information, wherein the control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A, then the channel access mode used when sending data of the service is determined to be mode A; or,

[0076] When the station establishes a service with the access point, the channel access mode requested for the service is mode A, and the access point responds to the control information, wherein the control information includes that the channel access mode allowed by the specified service or the specified service type of the station is mode A, then it is determined that the channel access mode used when sending data of the service is mode A.

[0077] Wherein, the determination module is used for:

[0078] When the station and the access point establish a service, it is negotiated to determine that the channel access mode of the service is mode B. If the access point sends the control information after the service is established, and the channel access mode allowed by the specified service or specified service type of the station in the control information is mode A, then it is determined that the channel access mode A or mode B is used when sending data of the service.

[0079] Wherein, the method A and the method B are the same or different channel access mechanisms; wherein the channel access mechanism includes:

[0080] Scheduling access mechanism;

[0081] Uplink contention access mechanism;

[0082] A hybrid mechanism of scheduling access mechanism and uplink contention access mechanism.

[0083] The scheduling access mechanism is a data transmission mode based on access point triggering or polling, or an uplink multi-user data transmission mode based on access point triggering or polling.

[0084] Wherein, the device further comprises:

[0085] A processing module is used to determine whether to access the wireless network where the access point is located according to the channel access method allowed by the designated service or designated service type of the site; and / or the site decides whether to enable the designated service or designated service type according to the channel access method allowed by the designated service or designated service type of the site.

[0086] In the embodiment provided by the present invention, an access point in a wireless network notifies a station of the channel access method to be adopted when sending data of a certain service or service type, thereby flexibly updating the status of the station buffer stored by itself to avoid repeated resource scheduling, thereby improving resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 This is an example diagram of multi-user parallel transmission frame exchange in the prior art;

[0088] Figure 2 A flowchart of an embodiment of a method for accessing a wireless network provided by the present invention;

[0089] Figure 3 An example diagram of transmission frame exchange provided in Embodiment 1 of the present invention;

[0090] Figure 4 An example diagram of transmission frame exchange provided in Embodiment 2 of the present invention;

[0091] Figure 5 This is a structural diagram of an embodiment of a wireless network access device provided by the present invention. DETAILED DESCRIPTION

[0092] To make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0093] The present invention provides a method for accessing a wireless network, comprising:

[0094] In a wireless network that supports multiple channel access methods, the access point maintains a service-based or site-based service connection state with the site, and changes the channel access method used by the above-mentioned service-based or site-based service connection by negotiating with the site or sending control information to the site.

[0095] In the method embodiment provided by the present invention, an access point in a wireless network notifies a station of the channel access method to be used when sending data of a certain service or service type, thereby flexibly updating the status of the station buffer stored by itself to avoid repeated resource scheduling, thereby improving resource utilization.

[0096] In addition, in the prior art, when the access mode of a site changes, it is necessary to disconnect the established service connection, and then re-establish the service and negotiate with the AP. This update method is not flexible and reduces the efficiency of the MAC layer. The method provided by the present invention also solves the above problems.

[0097] The channel access mode includes a contention-based access mode EDCA, a data transmission mode based on access point triggering or polling, and an uplink multi-user data transmission mode based on access point triggering or polling.

[0098] The control information includes information indicating a channel access method for a service or service type.

[0099] The control information also includes one or more time information for using the channel access method: cycle, start delay, and duration.

[0100] The control information also includes a priority level or a scheduling access mode for using the channel access method.

[0101] The control information further includes at least one of the following information: service type information, aggregation indication, user priority, service information response strategy and scheduling information.

[0102] The access point maintaining the service-based or site-based service connection state with the station refers to the parameters of the station maintaining the existing service connection with the access point, wherein the parameters include the connection identification number.

[0103] The control information used to change the channel access mode also includes:

[0104] access mode information specifying whether a specified service or a specified service type of the site adopts a contention access mechanism; and / or,

[0105] access mode information specifying whether a designated service or designated service type of the site adopts a scheduling access mechanism; and / or,

[0106] Specify whether the specified service or specified service type of the site adopts a hybrid access mode information of a scheduling access mechanism and a contention access mechanism; and / or,

[0107] When the current channel access mode is a service or service type of a scheduling access mechanism, access mode information of whether the designated service or designated service type of the site adopts a contention access mechanism; and / or,

[0108] When the current channel access mode is a hybrid access mode of a scheduling access mechanism and a contention access mechanism, access mode information that prohibits the use of a contention access mechanism for a designated service or designated service type of the site;

[0109] The scheduling access mechanism is a data transmission mode based on access point triggering or polling, or an uplink multi-user data transmission mode based on access point triggering or polling.

[0110] The method for negotiating with the site refers to a method for performing frame interactive negotiation by establishing a service ADDTS request frame and an establishing service ADDTS response frame.

[0111] The control information is sent via a public downlink broadcast message, or via a unicast message sent to the site.

[0112] The public downlink broadcast information is a beacon frame or a probe response frame.

[0113] The unicast message is a service establishment ADDTS response frame carrying service specification TSPEC information.

[0114] Figure 2 The present invention is a flowchart of an embodiment of a method for accessing a wireless network provided by the present invention. Figure 2 The methods shown include:

[0115] Step 201: The station receives control information sent by the access point;

[0116] Step 202: The station determines a changed channel access mode according to the control information;

[0117] Step 203: The station sends data of the designated service or service type according to the changed channel access mode.

[0118] In the method embodiment provided by the present invention, a station adopts a channel access mode when receiving data of a certain service or service type, so that an access point can flexibly update the status of the station buffer stored by itself to avoid repeated resource scheduling, thereby improving resource utilization.

[0119] The station determines the changed channel access mode according to the control information, including:

[0120] The station receives the control information, wherein the control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A; after receiving the control information, the station establishes a service with the access point, the station requests the channel access mode of the service to be mode B, the access point responds that the channel access mode of the service is mode A, and the channel access mode used by the station when sending data of the service is mode A; or,

[0121] The station receives the control information, wherein the control information includes that the channel access method allowed by the designated service or designated service type of the station is method A; after receiving the control information, the station establishes a service with the access point, the station requests that the channel access method for the service is method B, and the channel access method for the service responded by the access point is method B, then the station uses channel access method A or method B when sending data of the service.

[0122] The station determines the changed channel access mode according to the control information, including:

[0123] When the station establishes a service with the access point, the station requests that the channel access mode of the service is mode B, and the access point responds to the control information, wherein the control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A, then the channel access mode used by the station when sending data of the service is mode A; or,

[0124] When the station establishes a service with the access point, the station requests that the channel access mode for the service be mode A, and the access point responds to the control information, wherein the control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A, then the channel access mode used by the station when sending data of the service is mode A.

[0125] The station determines the changed channel access mode according to the control information, including:

[0126] The station negotiates and determines that the channel access mode of the service is mode B when establishing the service with the access point. If the access point sends the control information after the service establishment is completed, and the channel access mode allowed by the designated service or designated service type of the station in the control information is mode A, then the station uses the channel access mode A or mode B when sending data of the service.

[0127] Wherein, the method A and the method B are the same or different channel access mechanisms; wherein the channel access mechanism includes:

[0128] Scheduling access mechanism;

[0129] Uplink contention access mechanism;

[0130] A hybrid mechanism of scheduling access mechanism and uplink contention access mechanism.

[0131] The scheduling access mechanism is a data transmission mode based on access point triggering or polling, or an uplink multi-user data transmission mode based on access point triggering or polling.

[0132] Wherein, the method further comprises:

[0133] The station determines whether to access the wireless network where the access point is located according to a designated service of the station or a channel access method allowed by a designated service type; and / or,

[0134] The site determines whether to enable the designated service or designated service type according to the channel access mode allowed by the designated service or designated service type of the site.

[0135] Embodiment 1

[0136] Figure 3 This is a diagram showing an example of transmission frame exchange provided in Embodiment 1 of the present invention. Figure 3 In the schematic diagram shown:

[0137] The AP notifies all uplink services or service types (traffic classification, TCLAS) in the beacon Beacon and probe response Probe Response frames sent locally that the access mode is the UL OFDMA access mechanism.

[0138] When STA establishes a service (Traffic Stream, TS) of service type 1 with AP, STA sends a service establishment (Add Traffic Stream, ADDTS) request frame to AP, wherein the ADDTS request frame includes a service specification (TrafficSpecification, TSPEC) element, and the access policy field in the service specification element is set to contention-based access mode (Enhanced Distributed Channel Access, EDCA).

[0139] like Figure 3 As shown, after receiving the ADDTS request frame, the AP responds with an ADDTS response frame, wherein the access policy field in the TSPEC element carried by the ADDTS response frame is set to the UL OFDMA access mechanism. Then, when the STA sends data of service type 1, it can only use the access mode of the UL OFDMA access mechanism.

[0140] Since the AP knows that the data of service type 1 sent by the STA can only be accessed using the UL OFDMA access mechanism, the AP will update the STA buffer status stored in itself every time it schedules the STA to send uplink data of service type 1.

[0141] Embodiment 2

[0142] Figure 4 This is a diagram showing an example of transmission frame exchange provided in Embodiment 2 of the present invention. Figure 4 In the schematic diagram shown:

[0143] The AP notifies the access methods of various service types in the Beacon and Probe Response frames sent by the AP, where service type 2 is notified as the UL OFDMA access mechanism;

[0144] When the STA establishes a service of service type 2 with the AP, the STA sends an ADDTS request frame to the AP, wherein the ADDTS request frame includes a TSPEC element, and the access policy field in the TSPEC element is set to the contention-based access mode EDCA.

[0145] After receiving the ADDTS request frame, the AP responds to the STA with an ADDTS response frame. The access policy field in the TSPEC element carried in the ADDTS response frame is set to the EDCA access mechanism.

[0146] When sending data of service type 2, the STA may use the UL OFDMA access mechanism or the EDCA access mechanism.

[0147] Since the AP knows that the service type 2 data sent by the STA may adopt the access mode of the EDCA access mechanism, the AP will track the STA sending service type 2 data and update the STA buffer status saved by itself according to the tracking result to avoid repeated scheduling, thereby improving resource utilization.

[0148] Embodiment 3

[0149] When STA establishes service 3 with AP through ADDTS request frame and ADDTS response frame, the access policy field in the TSPEC element carried by the ADDTS request frame sent by STA is set to the EDCA-based access mode, and AP replies with an ADDTS response frame, and the access policy in the response frame is set to the UL OFDMA access mechanism. Then, STA can only use the UL OFDMA access mechanism when sending data of service 3.

[0150] Since the AP knows that the service type 3 data sent by the STA can only be accessed using the UL OFDMA access mechanism, the AP will update the STA buffer status stored in itself each time it schedules the STA to send uplink data.

[0151] Embodiment 4

[0152] When STA establishes service 4 with AP through ADDTS request frame and ADDTS response frame, the access policy field in the TSPEC element carried by the ADDTS request frame sent by STA is set to the access mode of the UL OFDMA access mechanism. AP replies with an ADDTS response frame, and the access policy in the response frame is set to the UL OFDMA access mechanism. Then, STA can only use the UL OFDMA access mechanism when sending data for service 4.

[0153] Since the AP knows that the data of service type 4 sent by the STA can only be accessed using the UL OFDMA access mechanism, the AP will update the STA buffer status stored in itself every time it schedules the STA to send uplink data.

[0154] Embodiment 5

[0155] When STA establishes service 5 with AP through ADDTS request frame and ADDTS response frame, the access policy field in the TSPEC element carried by the ADDTS request frame sent by STA is set to the access mode of EDCA, and AP replies with ADDTS response frame, and the access policy in the response frame is set to the access mode of EDCA. After replying to the response frame, AP notifies in beacon that the access mode of service 5 is UL OFDMA access mechanism, then STA can only use UL OFDMA access mechanism when sending data of service 5 subsequently.

[0156] Since the AP knows that the data of service type 5 sent by the STA can only be accessed using the UL OFDMA access mechanism, the AP will update the STA buffer status stored in itself every time it schedules the STA to send uplink data.

[0157] Embodiment 6

[0158] The AP notifies the access methods of various service types in the Beacon and Probe Response frames it sends, among which service type 6 is the EDCA access mechanism.

[0159] When STA establishes a service of service type 6 with AP, STA sends an ADDTS request frame to AP. The frame contains a TSPEC element, and the access policy field in the element is set to the contention-based access mode as EDCA access mechanism. After receiving the ADDTS frame, AP responds with an ADDTS response frame. The access policy field in the TSPEC element carried by the frame is set to EDCA access mechanism. Then, STA can only use the access mode of EDCA access mechanism when sending data of service type 6.

[0160] Since the AP knows that the service type 6 data sent by the STA can only be accessed using the EDCA access mechanism, the AP may not save the data cache status of the service type 6 in the STA buffer and does not allocate resources to the STA, thereby improving resource utilization.

[0161] Embodiment 7

[0162] The AP notifies the access methods of various service types in the Beacon and Probe Response frames it sends, among which service type 7 is the EDCA access mechanism.

[0163] When STA establishes a service of service type 7 with AP, STA sends an ADDTS request frame to AP, which contains a TSPEC element, and the access policy field in the element is set to the contention-based access mode as EDCA access mechanism. After receiving the ADDTS frame, AP responds with an ADDTS response frame, and the access policy field in the TSPEC element carried by the frame is set to UL OFDMA access mechanism. Then, STA can use the access mode of EDCA access mechanism or UL OFDMA access mechanism when sending data of service type 7.

[0164] Since the AP knows that the service type 7 data sent by the STA may adopt the access mode of the EDCA or UL OFDMA access mechanism, the AP will track the STA sending the service type 7 data and update the STA buffer status saved by itself according to the tracking result to avoid repeated scheduling, thereby improving resource utilization.

[0165] Embodiment 8

[0166] The AP notifies the access modes of various service types in the Beacon and Probe Response frames it sends, where service type 8 is the UL OFDMA access mechanism.

[0167] When the STA establishes a service with the AP, the service data of service type 8 is sent directly using the access mode notified by the AP, that is, using the UL OFDMA access mechanism.

[0168] Embodiment 9

[0169] When STA establishes service 9 with AP through ADDTS request frame and ADDTS response frame, the access policy field in the TSPEC element carried by the ADDTS request frame sent by STA is set to the access mode of the EDCA mechanism, and the AP replies with an ADDTS response frame, and the access policy in the response frame is set to an access mode that is a mixture of the EDCA mechanism and the scheduling access mechanism.

[0170] After the service is established, multiple stations send their uplink data buffer status to the AP. The AP will send a trigger frame to trigger multiple stations to perform uplink OFDMA transmission to the AP at the same time, thereby improving transmission efficiency. Therefore, the AP sends a wireless frame to the STA, which carries control information, instructing the STA to prohibit the use of the EDCA mechanism access method to send service 9 data.

[0171] After receiving this control information, the STA no longer sends the data of service 9 through the EDCA mechanism, but waits to receive the trigger frame from the AP. After receiving the trigger frame, the STA sends the data of service 9 using the access method of the scheduling access mechanism.

[0172] Embodiment 10

[0173] When the STA establishes the service 10 with the AP through the ADDTS request frame and the ADDTS response frame, it is negotiated that the access mode adopted when the STA sends the service or service type 10 is the scheduling access mechanism of UL OFDMA.

[0174] After establishing the service, the AP sends a radio frame carrying control information to notify all uplink services with the scheduled access mechanism that they are allowed to use the EDCA mechanism access method. After receiving the control information, the STA can send services or service type 10 data through the EDCA mechanism.

[0175] Since the AP knows that the data of the service or service type 10 sent by the STA may adopt the access mode of the EDCA or UL OFDMA access mechanism, the AP will track the data of the service or service type 10 sent by the STA, and update the STA buffer status saved by itself according to the tracking result. If the data of the service or service type 10 has been sent through the access mode of EDCA, the AP will no longer allocate uplink resources for the service or service type 10 to avoid repeated scheduling, thereby improving resource utilization.

[0176] Embodiment 11

[0177] In a tunneled direct-link setup (TDLS), STA1 wants to send data to STA2. Before sending data, STA1 will initiate a service flow establishment request ADDTS request frame to the AP. The AP responds with an ADDTS response frame to indicate that the access method for STA1 to send service type 11 is the scheduling access mechanism. Afterwards, because the number of sites in the current service set is reduced, the AP allows multiple sites to use the EDCA mechanism to send data. The AP sends a service update frame carrying control information to STA1, indicating that the access method for STA1 to send service type 11 can use the EDCA access mechanism. In the subsequent process, STA1, STA2 and AP do not cut off the existing service connection, and keep the established service connection identification number unchanged. STA1 can send service type 11 data to STA2 using the EDCA or scheduling access mechanism access method.

[0178] The present invention provides a wireless network access device, comprising:

[0179] The change module is used to maintain the service-based or site-based service connection status with the site in a wireless network that supports multiple channel access methods, and to change the channel access method used by the above-mentioned service-based or site-based service connection by negotiating with the site or sending control information to the site.

[0180] The channel access mode includes a contention-based access mode EDCA, a data transmission mode based on access point triggering or polling, and an uplink multi-user data transmission mode based on access point triggering or polling.

[0181] The control information includes information indicating a channel access method for a service or service type.

[0182] The control information also includes one or more time information for using the channel access method: cycle, start delay, and duration.

[0183] The control information also includes a priority level or a scheduling access mode for using the channel access method.

[0184] The control information further includes at least one of the following information: service type information, aggregation indication, user priority, service information response strategy and scheduling information.

[0185] The access point maintaining the service-based or site-based service connection state with the station refers to the parameters of the station maintaining the existing service connection with the access point, wherein the parameters include the connection identification number.

[0186] The control information used to change the channel access mode also includes:

[0187] access mode information specifying whether a specified service or a specified service type of the site adopts a contention access mechanism; and / or,

[0188] access mode information specifying whether a designated service or designated service type of the site adopts a scheduling access mechanism; and / or,

[0189] Specify whether the specified service or specified service type of the site adopts a hybrid access mode information of a scheduling access mechanism and a contention access mechanism; and / or,

[0190] When the current channel access mode is a service or service type of a scheduling access mechanism, access mode information of whether the designated service or designated service type of the site adopts a contention access mechanism; and / or,

[0191] When the current channel access mode is a hybrid access mode of a scheduling access mechanism and a contention access mechanism, access mode information that prohibits the use of a contention access mechanism for a designated service or designated service type of the site;

[0192] The scheduling access mechanism is a data transmission mode based on access point triggering or polling, or an uplink multi-user data transmission mode based on access point triggering or polling.

[0193] The device for negotiating with the site refers to a device for performing frame interaction negotiation by establishing a service ADDTS request frame and establishing a service ADDTS response frame.

[0194] The control information is sent via a public downlink broadcast message, or via a unicast message sent to the site.

[0195] The public downlink broadcast information is a beacon frame, a probe response frame or a service change frame.

[0196] The unicast message is a service establishment ADDTS response frame or a service change frame carrying service specification TSPEC information.

[0197] In the device embodiment provided by the present invention, an access point in a wireless network notifies a station of the channel access method to be adopted when sending data of a certain service or service type, thereby flexibly updating the status of the station buffer stored by itself to avoid repeated resource scheduling, thereby improving resource utilization.

[0198] Figure 5 This is a structural diagram of an embodiment of a wireless network access device provided by the present invention. Figure 5 The device shown comprises:

[0199] The receiving module 501 is used to receive control information sent by the access point;

[0200] A determination module 502, configured to determine a changed channel access mode according to the control information;

[0201] The sending module 503 is used to send the data of the specified service or service type according to the changed channel access mode.

[0202] The determining module 503 is used for:

[0203] The control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A; after receiving the control information, a service is established with the access point, and the channel access mode of the service is requested to be mode B, and the channel access mode of the service responded by the access point is mode A, then the channel access mode used when sending data of the service is determined to be mode A; or,

[0204] The control information includes that the channel access method allowed by the designated service or designated service type of the site is method A; after receiving the control information, a service is established with the access point, and the channel access method of the service is requested to be method B. The channel access method of the service responded by the access point is method B, and then it is determined whether to use the channel access method A or method B when sending data of the service.

[0205] The determining module 503 is used for:

[0206] When the station establishes a service with the access point, the channel access mode requested for the service is mode B, and the access point responds to the control information, wherein the control information includes that the channel access mode allowed by the designated service or designated service type of the station is mode A, then the channel access mode used when sending data of the service is determined to be mode A; or,

[0207] When the station establishes a service with the access point, the channel access mode requested for the service is mode A, and the access point responds to the control information, wherein the control information includes that the channel access mode allowed by the specified service or the specified service type of the station is mode A, then it is determined that the channel access mode used when sending data of the service is mode A.

[0208] The determining module 503 is used for:

[0209] When the station and the access point establish a service, it is negotiated to determine that the channel access mode of the service is mode B. If the access point sends the control information after the service is established, and the channel access mode allowed by the specified service or specified service type of the station in the control information is mode A, then it is determined that the channel access mode A or mode B is used when sending data of the service.

[0210] Wherein, the method A and the method B are the same or different channel access mechanisms; wherein the channel access mechanism includes:

[0211] Scheduling access mechanism;

[0212] Uplink contention access mechanism;

[0213] A hybrid mechanism of scheduling access mechanism and uplink contention access mechanism.

[0214] The scheduling access mechanism is a data transmission mode based on access point triggering or polling, or an uplink multi-user data transmission mode based on access point triggering or polling.

[0215] Wherein, the device further comprises:

[0216] A processing module is used to determine whether to access the wireless network where the access point is located according to the channel access method allowed by the designated service or designated service type of the site; and / or the site decides whether to enable the designated service or designated service type according to the channel access method allowed by the designated service or designated service type of the site.

[0217] In the device embodiment provided by the present invention, a station adopts a channel access mode when receiving data of a certain service or service type, so that an access point can flexibly update the status of the station buffer stored by itself to avoid repeated resource scheduling, thereby improving resource utilization.

[0218] A person of ordinary skill in the art can understand that all or part of the steps of the above-mentioned embodiments can be implemented using a computer program flow. The computer program can be stored in a computer-readable storage medium. The computer program is executed on a corresponding hardware platform (such as a system, device, apparatus, component, etc.). When executed, it includes one of the steps of the method embodiment or a combination thereof.

[0219] Optionally, all or part of the steps of the above embodiment may also be implemented using an integrated circuit, and these steps may be made into integrated circuit modules, or multiple modules or steps therein may be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0220] The various devices / functional modules / functional units in the above embodiments may be implemented using a general-purpose computing device. They may be concentrated on a single computing device or distributed on a network composed of multiple computing devices.

[0221] When each device / functional module / functional unit in the above embodiments is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. The above-mentioned computer-readable storage medium can be a read-only memory, a disk or an optical disk, etc.

[0222] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope described in the claims.

Claims

1. A method for accessing a wireless network, comprising: In a wireless network supporting multiple channel access methods, an access point maintains a station-based service connection state with a station; as well as The access point sends control information to the station to change the channel access mode used by the station-based service connection, wherein the control information includes: when the current channel access mode is a hybrid access mechanism of a scheduling access mechanism and a contention access mechanism, information indicating that the channel access mode of a specified service or a specified service type of the station is prohibited from using a contention access mechanism; The access point sends a frame for triggering the station to perform uplink multi-user transmission of data between the station and the access point.

2. The method according to claim 1, wherein: The multiple channel access modes include: Contention access mode, data transmission mode based on access point triggering or polling, uplink multi-user data transmission mode based on access point triggering or polling.

3. The method according to claim 1, wherein: The control information includes information indicating a channel access mode for a service or service type; The control information also includes at least one of the following: One or more of the following time information of the channel access mode: period, start delay, duration; The priority level or scheduling access mode of the channel access method; or At least one of the following information: service type information, aggregation indication, user priority, service information response strategy and scheduling information.

4. The method according to claim 1, wherein: Maintaining the state of the site-based service connection with the site includes: The access point and the station maintain parameters of the existing service connection, wherein the parameters include a connection identification number.

5. The method according to claim 1, wherein: The control information also includes at least one of the following: Information indicating whether the channel access mode of the designated service or designated service type of the station is a contention access mechanism; Information indicating whether the channel access mode of the designated service or designated service type of the site is a scheduling access mechanism; Information indicating whether the channel access mode of the designated service or designated service type of the site is a hybrid access mechanism of a scheduling access mechanism and a contention access mechanism; When the current channel access mode of the service or service type is a scheduling access mechanism, information indicating whether the access mode of the designated service or designated service type of the site adopts a contention access mechanism; The scheduling access mechanism includes: a data transmission mode based on access point triggering or polling, and an uplink multi-user data transmission mode based on access point triggering or polling.

6. A method for accessing a wireless network, comprising: The station receives control information sent by the access point, wherein the control information includes: when the current channel access mode is a hybrid access mechanism of a scheduling access mechanism and a contention access mechanism, information indicating that a channel access mode for a designated service or a designated service type of the station is prohibited from using a contention access mechanism; receiving, at the station, a trigger frame sent by the access point, wherein the trigger frame is used to trigger the station to perform uplink multi-user transmission of data between the station and the access point; According to the control information, the station determines a changed channel access mode used for a station-based service connection; and According to the changed channel access mode, the station sends the data to the access point.

7. The method according to claim 6, wherein: Determining the changed channel access mode according to the control information includes: When the control information includes an indication that the channel access mode allowed to be adopted is mode A; and after receiving the control information, the station establishes a service with the access point, the channel access mode requested by the station for the service is mode B, and the channel access mode of the service responded by the access point is mode A, then the channel access mode used by the station when sending the data to the access point is mode A; or, When the control information includes an indication that the channel access mode allowed to be adopted is mode A; and after receiving the control information, the station establishes a service with the access point, the station requests the channel access mode of the service to be mode B, and the access point responds that the channel access mode of the service is mode B, then the channel access mode used by the station when sending the data to the access point is mode A or mode B; or, When the station establishes a service with the access point, the station requests that the channel access mode of the service be mode B, and the access point responds to the control information, wherein the control information includes an indication that the channel access mode allowed to be adopted is mode A, then the channel access mode used by the station when sending data of the service is mode A; or, When the station establishes a service with the access point, the station requests that the channel access mode of the service be mode A, and the access point responds to the control information, wherein the control information includes an indication that the channel access mode allowed to be adopted is mode A, then the channel access mode used by the station when sending data of the service is mode A; or, The station negotiates and determines that the channel access method of the service is method B when establishing the service with the access point. If the access point sends the control information after the service establishment is completed, and the control information includes an indication that the channel access method allowed to be adopted is method A, then the channel access method used by the station when sending data of the service is method A or method B.

8. The method according to claim 7, wherein: The method A and the method B are the same or different channel access mechanisms, The channel access mechanism includes: Scheduling access mechanism; Uplink contention access mechanism; or A hybrid mechanism of scheduling access mechanism and uplink contention access mechanism.

9. The method according to claim 6, further comprising: The station determines whether to access the wireless network including the access point according to the designated service of the station or the channel access mode allowed by the designated service type; or, The site determines whether to enable the designated service or designated service type according to the channel access mode allowed by the designated service or designated service type of the site.

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