WO2018014503A1

WO2018014503A1 - Wireless station point state information reporting method and apparatus

Info

Publication number: WO2018014503A1
Application number: PCT/CN2016/111493
Authority: WO
Inventors: 张阳林; 韩志强; 李楠; 吕开颖
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-07-22
Filing date: 2016-12-22
Publication date: 2018-01-25
Also published as: CN107645778A

Abstract

Disclosed is a wireless station point state information reporting method, comprising: sending a wireless frame; arranging state information about a wireless station point in a designated domain of the wireless frame; and the state information about the wireless station point being used to trigger a wireless frame receiving end to adjust a transmission control arrangement in accordance with a pre-set network strategy. The present invention further discloses another wireless station point state information reporting method, and a wireless station point state information reporting sending apparatus, and a wireless station point state information reporting receiving apparatus.

Description

Wireless station status information reporting method and device

Technical field

The present invention relates to information processing technologies in the field of wireless networks, and in particular, to a method and apparatus for reporting state information of wireless stations.

Background technique

In the field of wireless local area network (WLAN), the Basic Service Set (BSS) is an integral part of the architecture of the 802.11 standard. The BSS usually has one access point (AP, Access Point) and multiple Non-Access Point STAs (APs) are sites with additional functions for managing basic BSS and accessing distributed systems. Non-access point wireless stations are often referred to as wireless stations. , including devices with wireless network cards, such as terminals.

At present, a BSS usually adopts multi-user transmission, and the multi-user parallel transmission scheme is divided into an uplink multi-user and a downlink multi-user. The uplink multi-user refers to the AP allocating resources to multiple radio stations, and sending a trigger frame to some wireless stations to indicate uplink. Transmitting resources, the wireless station simultaneously transmits data to the AP on a given resource according to the resource indication in the trigger frame, and the AP receives data of each wireless station on the corresponding resource, and if received correctly, in the form of multicast or broadcast Reply to the confirmation frame and complete a data exchange. The downlink multi-user refers to that the AP instructs the designated radio station to receive resources in the preamble, and instructs the designated radio station to use an implicit block acknowledge request (BAR), after the radio station receives the preamble. According to the resource indication information in the preamble, the data is received on the corresponding resource. After receiving the data, if the correct block reply (BA, Block Acknowledge) frame is received, a data exchange is completed.

In the existing radio frame exchange, in order to improve transmission efficiency and reduce the interval between data units, a plurality of data to be transmitted are aggregated and transmitted in a transmission queue, and both sides need to establish block confirmation before performing aggregation transmission. Mechanism, maintaining a receive buffer and a send buffer in each access point and wireless station, receiving the received MAC of the buffer cache The service data unit (MSDU, MAC Service Data Unit), the MSDU to be sent by the buffer buffer, or the MSDU waiting to be retransmitted; the receiving buffer is flushed by receiving the block confirmation request frame BAR, and the transmission buffer is flushed by receiving the BA; When the block acknowledgment mechanism is established, the transmitting and receiving dual-issue negotiates the cache information of both parties through the block acknowledgment request frame and the block acknowledgment response frame. The MAC protocol data unit (MPDU) is aggregated according to an association identifier (AID) at the transmitting end, and is called an aggregated MAC layer protocol data unit (A-MPDU, Aggregate MAC protocol data unit). An MPDU that may contain multiple TIDs (Traffic IDentifications) in an A-MPDU. In 802.11ax, the number of MPDUs aggregated by one A-MPDU may exceed 256. At the receiving end, since the negotiation of the receive buffer is based on the TID, when receiving the A-MPDU of the multi-TID, especially when the number of MPDUs aggregated per TID of the A-MPDU is large, the cache does not overflow for a single TID, but The cache sum of all TIDs may overflow, so the receive buffer needs to be reported so that the sender can make flow control adjustments. The receiving buffer on the wireless station side has two important functions. One is that the buffer receives the complete MSDU and waits for the protocol layer above the MAC layer to process. The other function is that the cached incomplete MSDU waits for the complete reception. Two important functions are needed. The MSDU is cached, so it is very necessary to receive the report of the cache status.

In 802.11ax, the transmission bandwidth is up to 160MHz, the modulation order is up to 1024, the space-time stream is up to 8, and the theoretical rate is 9.6Gbps. At high-speed transmission rate, the rate at which the wireless station receives data exceeds the rate processed by the MAC layer. The Aggregate MAC Service data unit (A-MSDU) in the receive buffer may be too long in the receive buffer due to the delay of the MAC layer. In this case, the space left in the receive buffer may be increased. The smaller the result, the more the buffer overflows; in view of this, it is necessary to report the receive buffer to the sender.

The wireless station reports the transmission buffer to the wireless frame receiving end, which is beneficial to the wireless frame receiving end for the next transmission, and the wireless frame receiving end performs resource scheduling on the wireless station according to the reported transmission buffer information, which is beneficial to the efficiency of the next transmission.

The next-generation WLAN is mainly to improve network efficiency. To improve the efficiency of the network, it is necessary to The overhead of the provincial network and the reporting of the wireless site cache are also beneficial for the effective transmission of data.

Therefore, how to save the network overhead, timely report the status information of the wireless station, improve the reporting accuracy, and improve the network transmission efficiency are urgent problems to be solved.

Summary of the invention

In view of this, the embodiments of the present invention are directed to a method and a device for reporting a wireless station status information, which can save network overhead, timely report status information of a wireless station, improve reporting accuracy, and improve network transmission efficiency.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

An embodiment of the present invention provides a method for reporting a wireless station status information, where the method includes:

Send a wireless frame;

The status information of the wireless station is set in a specified domain of the wireless frame.

In the foregoing solution, the setting, in the specified domain of the radio frame, the status information of the radio station, including: setting, in a specified domain of the radio frame, receiving buffer information and/or sending buffer information of the radio station;

The receiving buffer information and/or the sending buffer information includes: receiving buffer information and/or sending buffer information of the station, or receiving buffer information and/or sending buffer information of each access category (AC, Access Category) queue, or each The TID receives the cache information and/or the send buffer information.

In the above solution, the setting, in the specified domain of the radio frame, the status information of the radio station, including: setting the status information of the radio station to a high throughput HT (High Throughput) control domain, and/or quality of service. A QoS (Quality of Service) control domain, and/or an AID field in a unicast multi-TID BA frame, and/or a domain added with a station status information in a radio frame.

In the foregoing solution, the setting, in the specified domain of the radio frame, the status information of the radio station, including: setting, in the unicast multi-TID BA frame, the receive buffer information and/or the send buffer information corresponding to each TID. Go to the AID field corresponding to each TID.

In the above solution, the newly added field in the radio frame plus the status information of the station includes: adding a domain that reports the status information of the station in the enhanced multi-TID BA frame format, and based on the TID Or based on the site's receive/send cache information set to the newly added site status information field.

In the above solution, the setting the status information of the wireless station in the specified domain of the radio frame includes:

And dividing the specified domain into more than one subdomain, where the divided subdomain includes: an information value subdomain;

The status information is set in the information value subfield.

In the above solution, the divided sub-domain further includes: an information type sub-domain;

Setting type information in the information type subdomain;

The type information is used to indicate the type of the status information set in the sub-domain of the information value, and/or the identification information of the status information.

In the foregoing solution, the content of the received cache information includes: receiving buffer length information, and/or receiving cache granularity information;

The content of the sending cache information includes: sending buffer length information, and/or sending buffer granularity information.

In the foregoing solution, before the setting the status information of the wireless station in the specified domain of the radio frame, the method further includes: acquiring status information of the wireless station.

The embodiment of the invention further provides a wireless station status information reporting method, the method comprising:

Receiving a radio frame;

Obtaining the reported wireless station status information in a specified domain of the radio frame;

Adjusting the transmission control settings according to the preset network policy according to the status information of the wireless station.

In the above solution, the obtaining the reported wireless station status information in the specified domain of the radio frame includes: acquiring, in a specified domain of the radio frame, receiving buffer information and/or sending buffer information of the wireless station;

The receiving cache information and/or the sending cache information includes: receiving buffer information of the site and/or Or send buffer information, or receive buffer information and/or send buffer information of each AC queue, or receive buffer information and/or send buffer information of each TID.

In the foregoing solution, the obtaining the reported wireless station status information in the specified domain of the radio frame includes: in an HT control domain of a radio frame, and/or a QoS control domain, and/or a unicast multi-TID BA frame. The AID domain obtains the wireless station status information.

The embodiment of the present invention further provides a wireless station status information report sending device, where the device includes: a sending module and a setting module;

The sending module is configured to send a radio frame;

The setting module is configured to set status information of the wireless station in a specified domain of the wireless frame.

In the foregoing solution, the setting module is specifically configured to: set, in a specified domain of the radio frame, receive buffer information and/or send buffer information of the wireless station;

The receiving buffer information and/or the sending buffer information includes: receiving buffer information and/or sending buffer information of the site, or receiving buffer information and/or sending buffer information of each AC queue, or receiving buffer information of each TID and/or Send cached information.

In the foregoing solution, the setting module is specifically configured to: set status information of the wireless station to an HT control domain, and/or a QoS control domain, and/or an AID domain in a unicast multi-TID BA frame, and/or Or enhanced multi-TID BA frames in the newly added site status information reporting domain.

In the above solution, the setting module is specifically configured to: in the unicast multi-TID BA frame, set the receiving buffer information and/or the sending buffer information corresponding to each TID to the AID domain corresponding to each TID.

In the foregoing solution, the setting module is specifically configured to: add a domain that adds the site status information to the enhanced multi-TID BA frame, and set the TID-based or site-based receiving buffer information and/or the sending buffer information to the new Increased site status information in the domain.

In the above solution, the setting module is specifically set as:

And dividing the specified domain into more than one subdomain, where the divided subdomain includes: information value Subdomains;

The status information is set in the information value subfield.

Setting type information in the information type subdomain;

In the foregoing solution, the device further includes a first acquiring module, where the first acquiring module is configured to acquire state information of the wireless station before setting the state information of the wireless station in the specified domain of the wireless frame.

The embodiment of the present invention further provides a wireless station status information reporting and receiving device, where the device includes: a receiving module, a second acquiring module, and an adjusting module;

The receiving module is configured to receive a radio frame;

The second acquiring module is configured to obtain the reported wireless station status information in a specified domain of the radio frame;

The adjusting module is configured to adjust the transmission control setting according to the preset network policy according to the status information of the wireless station.

In the above solution, the second acquiring module is specifically configured to: acquire receiving buffer information and/or sending buffer information of the wireless station in a specified domain of the wireless frame;

In the above solution, the second acquiring module is specifically configured to: HT control in a radio frame The wireless station status information is obtained by a domain, and/or a QoS control domain, and/or an AID field in a unicast multiple TID BA frame.

Another embodiment of the present invention provides a computer storage medium storing execution instructions for performing one or a combination of the steps in the above embodiments.

The wireless station status information reporting method and apparatus provided by the embodiment of the present invention sends a radio frame; sets status information of the radio station in a specified domain of the radio frame; and the status information of the radio station is used to trigger the radio frame receiving end. Adjust the transmission control settings according to the preset network policy. In this way, the wireless station status information, especially the receiving buffer information and/or the sending buffer information, is multiplexed into the wireless frame, which saves network overhead and improves timeliness, and the accurate state information provided improves the accuracy of the reported information; Optionally, the radio frame receiving end adjusts the transmission control setting according to the cache information included in the status information, thereby improving network transmission efficiency.

DRAWINGS

1 is a schematic flowchart of a method for reporting state information of a wireless station according to an embodiment of the present invention;

2 is a schematic structural diagram of a structure of a multi TID BA frame according to an embodiment of the present invention;

3 is a schematic flowchart of working steps of an AP end and a wireless station according to an embodiment of the present invention;

4 is a schematic structural diagram of a structure of an AID domain multiplexed according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an information type sub-domain and an information value sub-domain according to an embodiment of the present invention;

FIG. 6 is a schematic flowchart of a step of receiving a buffer information according to a TID according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of several fixed formats of a wireless station receiving buffer report according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of an HT control domain that carries a wireless station receiving buffer information according to an embodiment of the present invention;

9 is a schematic structural diagram of a TID BA format according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a format reported by a BSR according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a wireless station status information report sending apparatus according to an embodiment of the present invention; intention;

FIG. 12 is a schematic structural diagram of a structure of a wireless station status information reporting and receiving apparatus according to an embodiment of the present invention.

detailed description

In the embodiment of the present invention, the state information of the wireless station is acquired; the state information of the wireless station is set to a specified domain in the wireless frame, and the wireless frame is sent to the wireless frame receiving end; according to the state of the wireless station Information, adjust the radio frame receiving end transmission control settings according to the preset network policy.

The present invention will be further described in detail below with reference to the embodiments.

The wireless station status information reporting method provided by the embodiment of the present invention is as shown in FIG. 1 , and the method includes:

Step 101: Obtain status information of the wireless station.

The status information herein includes receiving buffer information and/or transmitting buffer information; typically, in the BSS, one AP is associated with multiple wireless stations. The AP sends the downlink multi-user data to the multiple wireless stations. In the high-speed transmission scenario, the receiving buffer of the wireless station may become saturated. In order to prevent the receiving buffer overflow of the wireless station, the receiving buffer information receiving buffer information needs to be reported in real time; At the same time, because the data in the sending queue of the wireless station needs to be sent, in order to schedule the resource more reasonably according to the sending and buffering information of the queue, the sending cache information of the wireless station needs to be reported; therefore, the wireless station can obtain itself. Receive buffer information and/or send cache information; here, the receive buffer information and/or the send cache information includes: receiving buffer information and/or sending buffer information of the site, or receiving buffer information of each AC queue and/or sending Caching information, or receiving buffer information and/or sending buffer information of each TID; receiving buffer information and/or sending buffer information of the site includes: a total of the remaining receiving buffer queue size and/or a sending buffer queue currently reserved by the station Size, the received cache information and/or transmission of each access category The storage information refers to receiving buffer information and/or sending buffer information corresponding to one or more ACs; the receiving buffer information and/or the sending buffer information of the TID refers to receiving buffer information and/or sending buffer information corresponding to one or more TIDs. The receiving cache information may include: Indicates the length information of the current received buffer information, which is used to indicate the granularity information of the currently received cache information. The size of the receive buffer is represented by the product of the length and the granularity, and the granularity may be characterized in units of bytes. Here, the receiving buffer information may be the received receiving buffer information, or may be the remaining available receiving buffer information, etc.; the sending buffer information may include: length information indicating the current sending buffer information, used to indicate the current sending The granularity information of the cached information. The size of the send buffer is represented by the product of length and granularity, and the granularity can be characterized in units of bytes. Here, the sending buffer information may be the received receiving buffer information, or may be the remaining available sending buffer information, etc.; the sending buffer information refers to the size of the data queue that needs to be sent, may be based on the site, based on the connection Into the category AC.

Step 102: Set status information of the wireless station to a specified domain in a radio frame, and send the radio frame to a radio frame receiving end.

The wireless frame receiving end includes: an AP, or a wireless station in the IBSS; the wireless station may send its own status information to the AP, or a wireless station in the IBSS that performs wireless transmission with itself; the following sends the status to the AP in the BSS. The information is taken as an example to explain the technical solution of the present invention;

Specifically, the status information may be set to an HT control field in a radio frame, and/or a QoS control field, and/or a site association identifier AID field in a unicast multi-TID BA (multi TID BA) frame, and / or an enhanced multi-TID BA frame in the newly added site state information reporting domain or a specified domain in some radio frames; wherein the HT control domain may be an HT control domain of a data frame, and the QoS control domain may be a data frame QoS control domain; the designated domain may be a reserved or unused domain in data signals such as data frames or radio frames, in some cases, in which case the specified domain may perform other functions. Used to set additional information.

In practical applications, the specified domain may include two types, one is unused, the protocol is called Reserved bits, and the other is useful in a specific frame exchange, such as the AID field of the BA frame, which is sent. When multicasting Multi TID BA, the AID field is useful, filling in the site's site association identifier, but not used when unicasting Multi TID BA, can be used to carry other information;

Taking the state information set to a unicast multi TID BA frame as an example, in general, the AP sends downlink multi-user data to multiple wireless stations. After receiving the data, the wireless station replies to the unicast BA frame at the resource indicated by the AP; wherein the BA frame may be a multi TID BA frame, and the structure of the multi TID BA frame is as shown in FIG. 2, in the multi TID BA Each TID in the frame has a corresponding BA information field, corresponding to multiple BA information fields of different TIDs and exists in a multi TID BA frame. There is an 11-bit AID field in the head of the BA information field, and the AID field is used in When multicasting, the AID of the receiving end is indicated. Thus, each TID has a corresponding AID field; the unicast can use the receiving address field of the multi TID BA to indicate the receiving address; therefore, the AID field is reserved during unicast. In the unicast multi TID BA frame, the acquired state information of the wireless station can be multiplexed into the AID domain, and the status information of the wireless station is sent to the AP by using the unicast multi TID BA frame.

Optionally, the newly added field in the radio frame plus the status information of the station includes: adding a domain that reports the status information of the station in the enhanced multi-TID BA frame format, and the TID or the site-based receiving/sending buffer is configured. The information is set to the newly added site status information field.

Optionally, the specified domain may be divided into one or more subdomains, where the divided subdomain includes: an information value subdomain; where the information value subdomain may be used to set the wireless site. Status information; when setting the cache information, you can set the length information of the cache, and/or granularity information; when only the length information of the cache is set, the granularity information may default to 256 bytes in the wireless transmission protocol. .

In order to indicate the information type in the information value subfield, the information type subdomain may also be divided in the specified domain; the type information is set in the information type subdomain; and the type information is used to indicate the information value. The type of the status information set in the subdomain. The type information may be used to indicate that the status information in the information value subfield is which reception buffer information and/or transmission buffer information, such as receiving buffer information and/or transmission buffer information of the site, or the wireless station assigns to each The receiving buffer information and/or the sending buffer information of the AC queue, or the receiving buffer information and/or the sending buffer information allocated by the wireless station to each TID, may also indicate that the status information in the information value subfield is The received receive buffer information and/or the send cache information is also available receive buffer information and/or send cache information; and the cache information may also be indicated to include a buffer length Information, and/or cache granularity information; may also indicate identification information of the status information, such as an AC queue name or the like.

In an actual application, an optional solution may divide the first 3 bits of the 11-bit AID field into information type sub-domains, and the last 8 bits are divided into information value sub-domains; the first 3 bits in the information type sub-domain may be used to indicate Which kind of receiving buffer information and/or transmission buffer information in the information value sub-domain is, whether or not the granularity information, the receiving buffer information, and/or the transmission buffer information correspond to each TID, etc.; the 8-bit information value sub-domain may be all Used to indicate the length of the cache; the first 4 bits can also be used to indicate the length information of the cache, and the last 4 bits are used to indicate the granularity information of the cache. In this way, the range of lengths of the cache that can be indicated is wider to indicate a larger granularity from the default granularity information, or a smaller granularity from the default granularity, and an optional granularity indication of a larger granularity can be Yes, all 0 indicates a default granularity of 256 bytes, and all 1 indicates a maximum granularity of 65536 bytes. If you need to use some smaller receiving buffer devices, such as some industrial IoT devices, long distance, small traffic, in order to indicate a smaller granularity, you can also use the all-zero granularity information to indicate the 1-byte granularity. The granularity information of 1 indicates the granularity of the default granularity of 256. For the information value sub-domain and the information type sub-domain, for the specific application or implementation considerations, the information type sub-domain may not necessarily be limited to 3 bits, and the cache length information may not necessarily be limited to 8 bits, if the granularity is included. The information may not necessarily be limited to 4 bits.

Optionally, in the Multi TID BA frame, the BA information field is repeated every TID. Therefore, the cache information corresponding to the TID may be separately set in the AID field of the BA information field; the remaining available cache of the wireless station may also be used. The information is set to the AID field of the BA information field corresponding to each TID; the TID carries the priority of the user, and the priority of the user is mapped with the AC according to a certain rule, and the user priority is 0-7, wherein the

user priority

1 and 2 mapping to AC_BK; user priorities 0 and 3 are mapped to AC_BE; user priorities 4 and 5 are mapped to AC_VO; user priorities 6 and 7 are mapped to AC_VI; for TID caches mapped to the same AC queue, they may belong to the same AC Different TID queue cache information is reported in the form of an AC queue cache, thus saving overhead compared to the manner in which each TID is reported once.

Step 103: Adjust, according to the status information of the wireless station, a radio frame receiving end transmission control setting according to a preset network policy.

Here, the radio frame receiving end may pre-set the network policy according to information such as its own transmission speed, buffer size, and the like; the preset network policy includes: adjusting an AP transmission control setting such as an aggregated packet length of the AP to adapt The state of the AP and the wireless station; the prior art includes the network policy for the AP to adjust the AP after receiving the status information of the wireless station, where the existing network policy may also be used for adjustment;

Based on the sending cache information of the wireless station, the AP can know how many stations in the associated site need to send data, and the size of the cache queue that each station needs to send. Therefore, the AP obtains the transmission opportunity, and the scheduling station performs uplink multi-user transmission. The AP may perform scheduling according to the sending status information of the station. An optional solution is that the station that needs to send a large data queue allocates more bandwidth resources, and the small station that transmits the data queue allocates less bandwidth resources to achieve reasonable allocation of resources. And indicating the bandwidth resources allocated to each user in the trigger frame when the user is scheduled next time;

After receiving the radio frame with the status information sent by the radio station, the AP may first parse the information type sub-domain, and determine the sub-domain of the subsequent information value according to the information type indication. After the information value subdomain is successfully parsed, the AP may adjust the sending policy according to the receiving cache information and/or the sending buffer information of the wireless station at the next data transmission. If the receiving buffer space is large, the link status is good, and the length of the aggregated data packet can be increased. Otherwise, the link status is poor, and the incomplete MSDU with too much backlog is received in the receiving buffer. In this case, the aggregated data packet can be shortened. Length to increase the success rate of transmission;

In actual applications, the existing AP side can adjust the network policy of the wireless station status information to respond to the wireless station status information received by the AP.

The positive effects produced by the present invention will be further described in detail below with reference to specific examples.

Embodiment 1: Multi TID BA frame carries reception buffer information of a wireless station;

In a BSS with infrastructure, one AP is associated with multiple wireless stations, and the AP sends downlink multi-user data to multiple wireless stations. In a high-speed transmission scenario, the receiving buffer of the wireless station may become saturated, in order to To prevent the receiving buffer overflow of the wireless station, it is necessary to report the receiving buffer information in real time; the wireless station receives the destination wireless station and its own wireless station AID The same physical layer protocol data unit generates acknowledgment information for the physical layer protocol data unit and obtains its own cache information; after waiting for a short frame interval, it replies with an uplink unicast multi TID BA on the resource indicated by the AP, and Multiplexing its own receive buffer information into the AID field in the multi TID BA;

When the wireless station reports the received buffer information, the reported buffer length information may include the receiving buffer of all the TIDs, or the receiving buffer information corresponding to each TID; for all the TID buffer length information, the remaining buffer length of the current wireless station is indicated. Information; for the receiving buffer length information of each TID, indicating the buffer length information allocated by the current wireless station to each TID; when the wireless station reports the receiving buffer information, the granular information and the length information may also be reported together; therefore, it is necessary to The type of the reported information is indicated, and the multiplexed wireless station AID field can be divided into an information type sub-domain and an information value sub-domain. The information type sub-domain indication content includes: the information value sub-domain cache is the receiving cache information or the sending cache information, the granular information or the granular information, the cache information for all TIDs or the cache information of a single TID; the information value The sub-domain fills in the corresponding receiving buffer information value according to the type indication field; if there is no granularity information indication, the default granularity specified by the wireless transmission protocol may be 256 bytes; if the reported cache information is all TID cache information, then all The cache information of the TID corresponding to the multiplexed AID field is the same cache information; if the cached information is the cache information corresponding to each TID, the cache information of the AID domain is different for each TID; after the wireless station generates the receive buffer information, Responding to the multi TID BA frame on the resource indicated by the AP;

The AP receives the Multi TID BA frame sent by the wireless station, confirms the sent data according to the information of the BA information field, and clears the transmission buffer area, and parses out the wireless station cache information multiplexed into the AID domain; first, according to the information The type sub-domain determines the wireless station cache information of the AID domain of the wireless station; if the cache information reported by the wireless station includes the granularity information, the information value sub-domain behind the information type sub-domain resolves the corresponding cache length information and the cache granularity information; The cache of all TIDs obtained by the AP through the information type sub-domain can only resolve the wireless station cache corresponding to the first TID, because the following are repeated, unless the wireless station cache corresponding to the first TID is not solved. If the AP knows that the reported cache information is corresponding to each TID through the information type subdomain, the corresponding wireless station cache information of each TID is required. Parsing

The receiving buffer information obtained by the AP is adjusted according to the receiving buffer information of the wireless station in the next data transmission; if the receiving buffer space is large, the link status is good, and the length of the aggregated data packet may be increased. Otherwise, the description is The link status is poor, and there are too many incomplete MSDUs in the receive buffer. In this case, the length of the aggregated data packet can be shortened to improve the success rate of the transmission.

When the received status information is the received buffer information, the working steps of the AP end and the wireless station are respectively shown in FIG. 3a and FIG. 3b;

As shown in Figure 3a, the working steps of the AP are as follows:

Step 310: The AP sends downlink multi-user data, generates a pre-code multi-user data payload and a resource indication frame, and aggregates the data.

Step 311: The data completed by the aggregation is transmitted on the air interface;

Step 312: Send a BAR frame after the aggregate data transmission is completed.

As shown in Figure 3b, the working steps of the wireless station are as follows:

Step 320: Switch the channel state to the receiving state.

Step 321: Receive data on the air interface and set it to the receiving buffer.

Step 322: Receive a BAR;

Step 323: While responsive to the BAR frame, flushing the MSDU with an incomplete buffer or the MSDU that has timed out;

Step 324: Then generate a type indication of the wireless station receiving buffer, and determine whether to report the granularity or the like according to the size of the buffer space. If the buffer is large and exceeds the granularity specified by the previous protocol, the granularity information may be reported in the report receiving buffer information to indicate a larger buffer space;

Step 325: Generate a BA frame containing a site cache status report;

Step 326: Transfer the BA frame to the AP end.

The multiplexed AID field can adopt the structure shown in FIG. 4, wherein the first 3 bits are information type sub-domains, and the bit 0 of the information type sub-domain is used to indicate whether to receive buffer information or send buffer information, and bit 1 is used to indicate whether Cache granularity information, bit 2 indicates whether the cache information for each TID or the cache information for the RA receiving address; FIG. 5a shows the AID domain structure including only the cache length information in the information value sub-domain, and the granularity information may default to 256 bytes. The first 3 bits indicate the type of the reported information, and the last 8 bits indicate the length information of the buffer, which can indicate a buffer length of 65536 bytes in total; the information value subfield in FIG. 5b includes the AID field structure of the buffer length information and the cache granularity information, and the bit 3 to the bit 6 are caches. The length information, bit 7 to bit 10 is the cache granularity information, and the granularity that can be indicated by 4 bits is from 256 bytes to 4096 bytes. Other buffer length information and cache granularity information indicating scheme may also be adopted according to actual requirements.

Embodiment 2, the wireless station reports the receiving buffer information based on the TID in any radio frame to be sent;

In a BSS, one AP corresponds to multiple wireless stations, and the AP sends downlink multi-user data to each wireless station. Each wireless station maintains a receive buffer. The receive buffer has two functions. One is to sequentially cache the newly received MSDU. Until the complete A-MSDU is received in order, the second is to buffer the complete A-MSDU, waiting for the processing of the MAC layer.

The cache space of each wireless station is certain, and the data cache space of the AP has a great advantage compared with the wireless station; then, when the data is transmitted at a high speed, the receive buffer space of the wireless station is likely to overflow, therefore, It is beneficial to report the effective reception of the data to the receiving buffer of the wireless station in time. As shown in Figure 6, the specific implementation steps are as follows:

Step 601: Acquire receive buffer information.

Each time the wireless station receives an MSDU, it corresponds to a new cache state. The wireless station needs to cache the MSDU to the corresponding location in order until the reception is complete, and then it is delivered to the protocol layer above the MAC layer for processing. In the existing protocol, the received MSDUs are divided into different priorities according to their TIDs. Different priority MSDUs have different processing delays. Each TID has a different queue management mechanism, corresponding to the queue length allocated by the station. . When the AP and the radio station establish the block acknowledgment mechanism, the block acknowledgment mechanism negotiates the size of the receive buffer. The size of the receive buffer is fixed, and the queue size allocated to each TID cache MSDU is sufficient, but the sum of the maximum length of each TID corresponding queue may exceed the cache size agreed by the receiving station in establishing the block acknowledgement mechanism; for example, an agreed cache The size is 100 kilobytes, and the cache size corresponding to 8 TIDs in the agreed cache is 20 kilobytes. Obviously, the length of the cache corresponding to each TID can be satisfied when the cache length of other TIDs is small, but When data is cached in each TID cache, it is likely to be unsatisfied. At this time, the remaining caches of the site are averaged to the TID, and the length of each TID cache is reported. The wireless station reports the received cache information based on the TID including the length of each TID cache, and if necessary, the granularity.

Step 602: Determine a report form of the received cache information.

After the wireless station obtains the cache state information of each TID based on the TID, the cache information is carried by the necessary information type sub-domain and the information value sub-domain, and the type indication field indicates the type of the buffered state information and whether the size of the cache is carried. information. The information value subfield fills in the corresponding TID cache length information and granularity information based on the type indicated by the type field.

Step 603: Reporting the received cache information.

The wireless station can report the received buffer information in a short form. In order to achieve the purpose of immediately reporting the cached information, the receiving buffer information of the wireless station can be set in any wireless frame to be sent, provided that there are enough reserved bits in the wireless frame. Can carry the receive cache information. If the AID field in the unicast Multi TID BA frame is used, each TID cache information is set to the AID field corresponding to each TID.

Step 604: The AP end performs transmission control setting according to the receiving cache information of the wireless station.

The AP receives the radio frame that carries the receiving buffer information sent by the radio station, reads the receiving buffer information at the specified location, and obtains the length indication or the granularity indication of the buffer information according to the indication, and performs flow control on the next data transmission. Achieve effective transmission of the network.

Embodiment 3: the wireless station receives the buffer information based on the station report in any radio frame to be sent;

In a BSS, an AP corresponds to multiple wireless stations, and the AP has strong ability to transmit data. In the case of broadband, multi-stream, and high-order modulation, the receiving and buffering capability of the wireless station is insufficient. The unsorted MSDU segment is set at the time, or the wireless station receiving buffer is insufficient to set the complete MSDU in the receiving buffer temporarily due to the protocol processing delay above the MAC layer. In this case, the buffer status of the current site needs to be reported to the AP, so that the AP can make flow control transmission adjustments. The steps for the wireless station to receive the cached information based on the site report are as follows:

Step 611: Acquire receive buffer information.

Each receiving station completes an MSDU, and corresponding to a new buffer state, the receiving station needs to cache the MSDU to the corresponding location in order until the receiving is complete, and then passed to the protocol layer above the MAC layer for processing. Before the wireless station performs data transmission, it needs to establish a BA negotiation mechanism to negotiate the size of the receiving buffer. The role of the receive buffer is mainly reflected in two aspects, one is to cache the unsorted MSDU fragments, and the other is to buffer the complete MSDU waiting for the protocol layer above the MAC layer to process it. In the case of high-speed transmission, an extreme The possible situation is that the MSDU received by the station fills the buffer area due to the processing delay of the MAC layer. If the AP continues to transmit data, the data may be lost and unnecessary retransmission may occur. Another situation that may need to be reported to the receiving end of the wireless station is that in the case of low-speed transmission, the receiving buffer does not occupy much space, which causes waste of the receiving area of the transmitting wireless station. In this case, according to the link status. Adjust the data transfer rate as appropriate. Therefore, in these two cases, the reporting site needs to receive the cache information. In this case, the remaining receiving buffer size of the obtaining station is reported to the transmitting end in the form of a common indication of the length or the length of the granularity.

Step 612: Determine a report form of the received cache information.

The receiving buffer of the wireless station is indicated by a small number of bits, and is divided into an information type sub-domain and an information value sub-domain. The information type sub-domain indicates the type of the buffer information of the reported wireless station, such as whether to carry the length, whether to carry the granularity, and per-site. Reported, or reported to each TID, or reported to each AC. The information value sub-domain fills in the corresponding cache length information or granularity information according to the indication of the type indication field.

Step 613: Determine a manner of carrying the received cache information.

In order to achieve the timely reporting of the cached information, the cache state information in step B may be set in any radio frame that has enough reserved bits to carry the wireless station to receive the buffer information. The radio frame can be a data frame, a management frame, a unicast Multi TID BA frame, a wireless station is transmitting a unicast Multi TID BA frame, etc.; in a unicast Multi TID BA frame, an AID field can be used as a wireless station. Receive cached information.

Step 614: The AP receives the transmission control setting after receiving the cache information from the wireless station.

Embodiment 4: the wireless station reports the received cache information based on the AC queue in any radio frame to be sent;

The steps for the wireless station to report the received cache information based on the AC queue are as follows:

Step 621: The wireless station receives the acquisition of the cache information.

The site receives each of the MSDUs and has the TID information corresponding to the MSDU. Each TID is mapped to an AC queue. Generally, the number of AC queues is less than the number of TIDs. Therefore, different TIDs may correspond to the same AC queue. When establishing a block acknowledgment mechanism, the wireless station determines the size of the receiving buffer of each wireless station through negotiation. The total receiving buffer size of the wireless station is fixed, and the size of each AC queue is also certain, but the sum of the size of each AC queue is greater than the total. The size of the receive buffer, in which the receive buffer information based on the report queue of the AC queue is compared with the cache information of the TID-based report site, the overhead of the report can be saved, and the remaining cache information of each AC queue can be cached or granular. The form is reported to the AP.

Step 622: Determine a report form of the received cache information.

The receiving buffer of the wireless station is indicated by a small number of bits, and is divided into an information type sub-domain and an information value sub-domain. The information type sub-domain indicates the type of the cached information of the reported wireless station, for example, whether it carries the length, whether it carries the granularity, whether it is reported by each station, or is reported for each TID, or is reported for each AC. The information value subfield fills in the corresponding cache length information or granularity information according to the indication of the information type subdomain.

Step 623: Determine a manner of carrying the received cache information.

In order to achieve the timely reporting of the cached information, the cache state information in step X may be set in any radio frame having enough reserved bits to carry the wireless station to receive the buffer information, and the radio frame may be a data frame, a management frame, or a unicast. The Multi TID BA frame, the wireless station is transmitting the unicast Multi TID BA frame, etc.; in the unicast Multi TID BA frame, the AID field can be used as the receiving buffer information of the carrying wireless station.

Step 624: The AP end receives the buffer information after receiving the cache information, and then performs the transmission control setting.

Embodiment 5: receiving buffer information is carried in a QoS control domain or an HT control domain of a data frame;

In the BSS, one AP corresponds to multiple wireless stations, and the AP has basic service set management functions and management functions of distributed systems. The wireless station can passively report the receiving buffer. The access point sends the triggering frame to request the wireless station to report the receiving buffer. After receiving the triggering frame, the wireless station receives the buffering information to indicate the MAC frame header of the data frame to be sent, and the MAC frame header carries The domain receiving the cache information may be a QoS control domain, and the QoS control field of the data frame has a length of 16 bits, and includes 5 subdomains or 8 subfields, wherein the first 4 domains set the information type subfield, indicating the receive buffer of the latter domain. The content of the information. It has a specific meaning in different data frame types, and indicates the following content. The receiving buffer information of the site is carried in the QoS control domain, and needs to be indicated in the previous information value sub-domain to distinguish the information carried in the normal state of the QoS control domain, and to preserve the functions of the QoS control domain under normal conditions. . Therefore, it is necessary to indicate in some specified domains or unused information fields, indicating that the currently carried information is the receiving cache information of the wireless station. For example, when the wireless station sends a QoS control null frame to report the received buffer information, since the location of bit 7 is reserved unused, the information carried by bit 7 is used as the receiving buffer of the station; as long as the QoS control domain of the transmitted data frame When there are unused bits, the unused bits can be used to indicate the receiving buffer information of the subsequent carrying wireless station, and the receiving cache information of the wireless station is carried in the following domain. At this time, since the status information of the wireless station that is instructed to carry is only one bit of the bit that receives the buffer information, the fixed information may be adopted. The receiving cache report carrying format may be in any one of a to f in FIG. 7 .

In the HT control domain, the structure of one of the sub-domain HE control domains is as shown in FIG. 8. In the HE control domain, it is composed of multiple control information fields and padding bytes, and the control information field is controlled by the control information identifier and the change length. The information content is composed. Currently, the identifiers 8-15 are reserved and unused. Therefore, one of the 8-15 identifiers may be used to indicate that the control information content carried subsequently is the receiving cache information of the wireless station. It can be reported in any of the formats a to f in FIG.

The steps for the wireless station to report and receive the cache information based on the QoS control domain or the HT control domain are as follows:

Step 631: The AP triggers the wireless station to report the receiving buffer status.

On the AP, if the data to be retransmitted is increasing, and the AP detects this situation, the AP carries the indication bit that needs to be received by the wireless station to receive the buffer report, and then triggers the frame. Or the frame carrying the trigger indication information is sent to each wireless station; the wireless station parses the trigger frame, and obtains an indication of the receiving buffer that needs to be reported;

Step 632: The wireless station generates and receives the buffer status information.

The wireless station knows that it needs to report its receiving buffer information to the AP by parsing the trigger frame or the domain with the trigger indication information. Then, according to the current receiving buffer status, short receiving buffer information is generated and carried in the data frame to be sent, wherein the position in the data frame is the QoS control field of the MAC frame header or the HT control field of the data frame. And carry and indicate in the reserved domain of the QoS control domain or the HT control domain.

Step 633: Receive a mode of carrying the cache state information.

The receiving buffer information is carried in the data frame to be sent, and the fast reporting of the receiving buffer can be achieved; and the indication and the content of the receiving buffer status information are respectively indicated by unused bits. The content of the receiving buffer status information may include only reporting the receiving buffer length information or including the receiving buffer length information, and further including the granularity information;

Step 634: The AP receives an operation of receiving the cache information.

The AP receives the receiving buffer information of the wireless station, adjusts the link transmission rate according to the receiving buffer status of the wireless station side, or updates the receiving end to receive the buffer information for the next use, for example, the transceiver buffer negotiation for the block acknowledgment mechanism. .

Embodiment 6: The AP reports the cache information to the station.

In an infrastructure BSS, one AP node corresponds to multiple wireless stations, the AP node has the function of managing the service set, and is connected with the distributed system; the complex large amount of data communication transmission, in the existing implementation, the AP is compared In the wireless network, there is a stronger buffering capability, which basically meets the requirements of data transmission. However, in the future network, in order to satisfy the large-scale connection of objects, more and more wireless stations need to be connected; At the same time, multiple sites simultaneously transmit data to one access point AP. At this time, the AP may receive insufficient buffers due to receiving data of too many sites. Therefore, it is required to report the received cache information to the wireless station. The specific steps for the AP to receive the cache information from the station include:

Step 641: The AP acquires the receiving buffer information based on the current receiving buffer status.

The cached information obtained may be indicated by the length information, or the length granularity information is indicated together, the length information value is the length of the receiving buffer queue, the granularity information refers to the unit indicated by the length, and the type of the reported cache information may be based on The size of the site's cache, either based on the total remaining cache size, or the TID-based receive cache size, or the size of the cache queue based on the access queue AC;

Step 642: The AP generates corresponding receiving buffer information based on the frame to be sent.

The receiving buffer information may be carried in the unicast multi-TID BA frame or in the QoS control domain or the HT control domain of the data; when carried in the unicast multi-TID BA frame, the AID domain may be multiplexed into the AID domain. Unused, there is 11-bit space. An alternative solution is to divide the unused 11-bit space into two parts. One part is used to indicate the type of reporting buffer information, based on the report of the site, or based on The TID is reported based on the total remaining cached report, and whether the subsequent information value sub-domain is reported with granularity; the other part is used to indicate the value of the received buffer information, indicating the length of the reported buffer or Granular information. If the receiving buffer information of the AP is carried in the QoS control field of the data frame, it needs to be unused or The reserved field indicates the receiving buffer information, and carries the receiving buffer information in the subsequent value field, which is carried at this time; if it is carried in the HT control domain, it needs to use a specific control identifier to indicate that the carried control information is Receiving cache information;

Step 643: The operation of receiving the information reported by the AP by the station;

The station receives the received buffer information reported by the AP, and adjusts the transmitted data based on a predetermined network control policy, so that the data transmission is more efficient.

Embodiment 7: The transmission buffer information of the wireless station is carried in the Multi TID BA frame;

In an infrastructure-equipped BSS, an AP is associated with multiple sites, and the AP transmits multi-user data to multiple wireless sites in a single transmission opportunity. The target wireless station associated with the AP receives its own data and implicitly or explicitly displays a block acknowledgment request, and the wireless station generates a unicast Multi TID BA frame to acknowledge receipt of the correct frame. For the Multi TID BA frame generated at this time, the receiving address is AP, which is single. In each AID TID field of its subdomain, the site association identifier field filled in the AID field is the same as the address indicated by the AP, so The multiplexed AID field is used to report the transmission buffer information of the wireless station. The reporting of the sending buffer may be an active reporting manner or a passive reporting manner. The reporting of the sending buffer may be based on the reporting of the sending buffer of the site or the reporting manner of the sending buffer of the access category AC.

The steps for reporting are as follows:

Step 651: Acquire, send and receive cache information of the wireless station;

The AP transmits the downlink multi-user data to the associated wireless station, wherein the downlink multi-user data is multi-TID data based on the TID aggregation. After receiving the data, the station immediately generates a unicast Multi TID BA frame to confirm the received data. At this time, if there is data to be sent in the transmission queue of the wireless station, the status information of the transmission buffer is generated according to the state of the transmission queue. The status information of the generated transmission buffer may include one of the following forms of transmission buffer status information: based on the transmission buffer information of the station, based on the transmission category information of the access category AC. The site-based sending buffer information refers to the size of the queue of the total data to be sent in the sending queue of the station; the sending buffer information based on the access category refers to the data queue to be sent in each of the access categories AC to the column. Size; each TID queue indicated by the receive buffer information reported by the base TID is required. The size of the send data queue.

Step 652: The reporting format of the sending cache information of the wireless station;

The generated sending buffer information includes an information type sub-domain and an information value sub-domain, wherein the information type sub-domain indicates that the carried cache information is sending cache information, and is based on the site sending buffer information or the AC-based sending buffer information or based on The transmission buffer information reported by the TID. The sub-domain of the information value for reporting the transmission buffer information is carried in one of the following formats: the value field includes the length information of the transmission buffer, and the default granularity is adopted; the value field includes the length information of the transmission buffer and the granularity information, wherein the granularity may be based on actual It is necessary to use a larger granularity representation range than the default granularity, or a smaller granularity representation range than the default granularity.

Step 653: The wireless station sends the cache information to carry;

For the unicast Multi TID BA, in a sub-domain AID field of its frame format, the content indicated by the unicast form and the received address field are the same, and therefore can be used for carrying the transmission buffer information; The AID field has 11 bits available. Therefore, it can be reported in a flexible format according to the accuracy of the cache information that needs to be reported. A feasible solution may be: according to the reporting format of the sending buffer information in the QoS domain, the length information may be completely represented by using 8 bits, and the default granularity may be reported, or a certain sub-domain indication may be reported. Granularity.

Step 654: The AP end parses the sending buffer information reported by the wireless station.

The AP receives the unicast Multi TID BA frame sent by the radio station, first flushes the buffer for the data confirmed by the block acknowledgement frame, and retransmits the data that is not confirmed by the unconfirmed data and does not exceed the retransmission time. The AID field first parses the information type sub-domain of the cache information, confirms that the carried site cache information is the transmission cache information, and is based on the site-based transmission buffer information or the AC-based transmission buffer information, or the TID-based transmission buffer. Information; and whether to carry granular information and so on. Then, the transmission buffer status of each station is recorded. When the next transmission is scheduled, different resource blocks can be allocated according to the size of the transmission buffer to achieve reasonable utilization of resources.

Embodiment 8: The receiving/sending buffer status information of the wireless station is carried in the HT control domain;

Scenarios where frequent data exchange is required at some wireless sites, including infrastructure BSS, independent service set IBSS, or DMG (direction Multi-gigabit) site in Mesh network, data exchange is frequent, while the station receives data, there is also data waiting to be sent in the queue. At this time, it is particularly important for the station to receive/send the buffer information, and one of the possible carrying modes can be carried in the HT control domain. The receiving/sending buffer information of the wireless station is carried in the HT control domain. This is a relatively simple carrying mode. This is because there are more reserved bits in the HT control domain. When the receiving/sending buffer information of the station is carried in the When the HT is in the control domain, it needs to be instructed. In the sub-domain HE change field in the HT control domain, a total of 32 bits can carry control information, and 4 bits are used to indicate the control identification of the information. Control flags 8-15 are reserved unused, so these unused identification numbers can be utilized to indicate the received receive/send cache information. The receiving and sending buffer status information is carried in subsequent sub-domains.

Specifically, the steps of receiving/sending buffer information carried in the HT control domain are as follows:

Step 661: Acquire/send acquisition of cache information;

In some scenarios where data exchange is frequent, data is received within the duration of one transmission opportunity, and data needs to be transmitted or scheduled in the next adjacent transmission opportunity. At this time, the station reports its own receiving buffer information and sending buffer information to the target communication. On the one hand, when the station receives data, the reported receiving buffer information is beneficial to the target communication station to adjust the transmission, such as flow control; on the other hand, the site reporting and sending the cache information is beneficial to the site to obtain the scheduling in time. And get a reasonable resource block for data transfer. The station in the data transmission, if the radio frame to be sent immediately contains the HT control field, can carry its own receiving/sending buffer information in the HT control domain with the actual situation, and the carried information includes a combination in the form; / Cache queue length information; granularity of receive/send queues; based on TID or based on AC access categories or site-based cache status information.

Step 662: Receive/send a report form of the cache information.

The receiving/sending buffer information reported by the wireless station needs to include the cache type information and the information value indicating the size of the value. The type information indicates that the received/received cache information is based on the report of the site, or is based on the AC report or based on the TID report. And whether it contains granular information and so on. If the received/sent buffer information reported by the wireless station only contains the length information of the cache queue, the granularity adopts the default granularity, and if the received/transmitted cache information contains granular information, a new granularity indication is adopted.

Step 663: The radio frame receiving end parses the receiving/sending buffer information reported by the radio station.

When parsing the HT control domain, the radio frame receiving end parses the control ID, confirms that the reported information is the receiving/transmitting buffer information, and then parses the specific content of the received/transmitted buffer information carried in the subsequent domain. After the radio frame receiving end obtains the receiving/sending buffer information of the infinite station, the radio frame receiving end performs transmission control according to the receiving/sending buffer information or performs user scheduling in the next transmission opportunity. Thereby improving the transmission efficiency of the network.

Embodiment 9: reporting site status information in an enhanced multi-TID BA frame;

In millimeter microwave communication, the information transmission between stations is usually spread within the line of sight, so that a high transfer rate can be achieved, and the information transmission rate per second can reach more than gigabit. In addition, if two sites that are not in the line of sight need to transmit information, a third-party site is required as a relay site to store and forward the received data. In these two scenarios, the receiving buffer of the site may be insufficient. Therefore, it is necessary to report the receiving buffer information of the site in time, so that the sender can adjust the sending policy and improve the validity of the transmission.

In the millimeter wave communication, the receiving buffer information of the station may be reported in the form of a site or in the form of a TID, and the type of the receiving and receiving the cache information may be indicated by the type indicating field.

In the existing millimeter microwave communication, the latest proposal adopts an enhanced multi-TID BA frame format, in which the information of the wireless station can be carried in some unused designated fields, and new ones can be added. Domain, which increases the frequency at which the site reports receiving cache information.

Specifically, the step of the wireless station reporting the received cache information in the enhanced multi-TID BA is as follows:

Step 671: The wireless station receives the acquisition of the cache information.

In a network that transmits data at high speed, especially in the case of line-of-sight propagation, if the remaining buffer space of the station is insufficient, it is necessary to generate the current cache state information for the current cache. The status is reported, and the generated cache information may be site-based or TID-based. The site-based cache information indicates the size of the currently remaining cache space. The TID-based receive buffer information indicates the negotiation during the BA negotiation. The size of the cache space based on the TID.

Step 672: The wireless station receives the carried of the cache information.

The wireless station can be carried in the enhanced multi-TID BA. It can be carried in some unused Reserved domains. In addition, in order to improve the efficiency of reporting, a new BSR domain can be designed for reporting. The enhanced multi-TID BA format is shown in Figure 9. As shown, when B12 is set to 1, the ACK bit table is set to the content of the ACK acknowledgement. When B12 is set to 0, the ACK bit table can be multiplexed into BSR report, and an optional BSR report format is as shown in FIG. The TID field indicates that the TID information of the received buffer is reported, and the AC information field indicates the received access category information of the received buffer. The scale factor indicates the unit of the reported queue size. An optional value is: 16,128,2048,16384 bytes. The queue size indicates the buffer size of the reported TID-based or AC-based queue, and the total queue size indicates the size of the total queue remaining based on the negotiation. When the enhanced multi-TID BA frame is not used for the acknowledgment management frame, the ACK bit field can be multiplexed as the BSR. If the enhanced multi-TID BA frame needs to be used for the acknowledgment management frame, a new field can be added for the BSR and the BSR reports. The format is shown in Figure 10.

Step 673: After the wireless receiving end receives the BSR, the operation is performed;

The buffer status information is carried in the enhanced multi-TID BA frame. After receiving the enhanced multi-TIDBA frame, the wireless receiving end first confirms the data frame and the management frame. If the confirmation information of the acknowledgement management frame is not carried, the original ACK is performed. The bit field parses the reported cache information, otherwise the cached status information reported in the newly added report receiving the cache information is parsed. The wireless receiving end makes reasonable flow control based on the reported receiving buffer information.

As shown in FIG. 11 , the apparatus includes: a sending module 1101 and a setting module 1102, where

The sending module 1101 is configured to send a radio frame.

The setting module 1102 is configured to set status information of the wireless station in a specified domain of the wireless frame.

Here, the wireless station status information reporting and transmitting device may be a non-AP wireless station in the BBS, or a non-AP wireless station in the wireless frame transmitting end of the IBBS. Typically, in a BSS, one AP is associated with multiple wireless stations. The AP sends the downlink multi-user data to multiple wireless stations. In the high-speed transmission scenario, the receiving buffer of the wireless station may become saturated. In order to prevent the receiving buffer overflow of the wireless station, the receiving buffer needs to be reported in real time; In the sending queue, there is data to be sent. In order to schedule the resource more reasonably according to the sending buffer information of the queue, the sending buffer information of the wireless station needs to be reported. The setting module 1102 is specifically set to: Setting the receiving buffer information and/or sending buffer information of the wireless station in the specified domain of the wireless frame; where the receiving buffer information and/or the sending buffer information includes: receiving buffer information and/or sending buffer information of the site, or each Receiving buffer information and/or sending buffer information of the AC queue, or receiving buffer information and/or sending buffer information of each TID; receiving buffer information and/or sending buffer information of the site includes: total remaining reception of the station Cache queue size or size of the send buffer queue, the receiving of each access category is slow The storage information and/or the transmission buffer information refers to the reception buffer information and/or the transmission buffer information corresponding to one or more ACs; the reception buffer information and/or the transmission buffer information of the TID refers to the reception buffer information corresponding to one or more TIDs. And/or sending the cache information; the receiving buffer information may include: length information indicating the current received cache information, used to indicate the granularity information of the currently received cache information, and the size of the receive buffer is represented by a product of length and granularity. Granularity can be characterized in bytes. Here, the receiving buffer information may be the received receiving buffer information, or may be the remaining available receiving buffer information, etc.; the sending buffer information may include: length information indicating the current sending buffer information, used to indicate the current sending The granularity information of the cached information. The size of the send buffer is represented by the product of length and granularity, and the granularity can be characterized in units of bytes. Here, the sending buffer information may be the allocated sending buffer information, or may be the remaining available sending buffer information, etc.; the sending buffer information refers to the size of the data queue that needs to be sent, and may be based on the site, based on Into the category AC

In the IBSS, each wireless station is in the same position. When two wireless stations transmit each other, they can report their status information to the other party; therefore, the receiving wireless address can obtain its own receiving buffer information and/or sending buffer. information.

The setting module 1102 is configured to set status information of the wireless station to a specified domain in a radio frame, and send, by the sending module, the radio frame to a radio frame receiving end;

Optionally, the status information may be set to an HT control domain in a radio frame, and/or a QoS control domain, and/or a site association identifier AID field in a unicast multi-TID BA frame, and/or in a wireless manner. The frame is newly added to a specified domain in some radio frames, such as a domain reporting the status information of the station; wherein the HT control domain may be an HT control domain of the data frame, and the QoS control domain may be a QoS control domain of the data frame, the designation A domain may be a reserved or unused space in a data signal such as a data frame or a radio frame, in some cases, in which case the designated domain may be multiplexed with other functions and may be used to set additional information.

In practical applications, the specified domain may include two types, one is unused, the protocol is called Reserved bits, and the other is useful in a specific frame exchange, such as the AID field of the BA frame, and the multicast Multi is transmitted. In the TID BA, the AID field is useful, filling in the site's site association identifier, but not used when unicasting the Multi TID BA, it can be used to carry other information;

For example, the state information is set to a unicast multi TID BA frame; typically, the AP sends downlink multi-user data to multiple wireless stations. After receiving the data, the wireless station replies to the unicast BA frame at the resource indicated by the AP; wherein the BA frame may be a multi TID BA frame, and the structure of the multi TID BA frame is as shown in FIG. 2, in the multi TID BA Each TID in the frame has a corresponding BA information field, corresponding to multiple BA information fields of different TIDs and exists in a multi TID BA frame. There is an 11-bit AID field in the head of the BA information field, and the AID field is used in When multicasting, the AID of the receiving end is indicated. Thus, each TID has a corresponding AID field; the unicast can use the receiving address field of the multi TID BA to indicate the receiving address; therefore, the AID field is reserved during unicast. In the unicast multi TID BA frame, the acquired state information of the wireless station can be multiplexed into the AID domain, and the status information of the wireless station is sent to the AP by using the unicast multi TID BA frame.

Optionally, the newly added field in the radio frame plus the status information of the station includes: adding a field for reporting the status information of the station in the enhanced multi-TID BA frame format, and setting the TID or the site-based receiving/sending cache information. Go to the newly added site status information field.

In order to indicate the information type in the information value subfield, the information type subdomain may also be divided in the specified domain; the type information is set in the information type subdomain; and the type information is used to indicate the information value. The type of the status information set in the subdomain. The type information may be used to indicate that the status information in the information value subfield is which reception buffer information and/or transmission buffer information, such as receiving buffer information and/or transmission buffer information of the site, or the wireless station assigns to each The receiving buffer information and/or the sending buffer information of the AC queue, or the receiving buffer information and/or the sending buffer information allocated by the wireless station to each TID, may also indicate that the status information in the information value subfield is The received receive buffer information and/or the send cache information is also available receive buffer information and/or send cache information; the cache information may also be indicated to include cache length information, and/or cache granularity information; Identification information of the information, such as the name of the AC queue.

In an actual application, an optional solution may divide the first 3 bits of the 11-bit AID field into information type sub-domains, and the last 8 bits are divided into information value sub-domains; the first 3 bits in the information type sub-domain may be used to indicate Which kind of receiving buffer information and/or sending buffer information is in the information value sub-domain, whether or not the buffer granularity information, the receiving buffer information, and/or the sending buffer information correspond to each TID, etc.; the 8-bit information value sub-domain may All are used to indicate the length of the cache; the first 4 bits can also be used to indicate the length information of the cache, and the last 4 bits are used to indicate the granularity information of the cache. In this way, the range of lengths of the cache that can be indicated is wider to indicate a larger granularity from the default granularity information, or a smaller granularity from the default granularity, and an optional granularity indication of a larger granularity can be Yes, all 0 indicates a default granularity of 256 bytes, and all 1 indicates a maximum granularity of 65536 bytes. If you need to use some smaller receiving buffer devices, such as some industrial IoT devices, long distance, small traffic, in order to indicate a smaller granularity, you can also use the all-zero granularity information to indicate the 1-byte granularity. The granularity information of 1 indicates the granularity of the default granularity of 256. For the information value sub-domain and the information type sub-domain, for the specific application or implementation considerations, the information type sub-domain may not necessarily be limited to 3 bits, and the cache length information may not necessarily be limited to 8 bits, if the granularity is included. The information may not necessarily be limited to 4 bits.

Optionally, since the BA information field is repeated for each TID in the Multi TID BA frame, the cache information corresponding to the TID may be separately set in the AID field of the BA information field; The cache information is set to the AID field of the BA information field corresponding to each TID; the TID carries the priority of the user, and the priority of the user is mapped with the AC according to a certain rule, and the user priority is 0-7, wherein the

user priority

1 and 2 are mapped to AC_BK; user priorities 0 and 3 are mapped to AC_BE; user priorities 4 and 5 are mapped to AC_VO; user priorities 6 and 7 are mapped to AC_VI; for TID caches mapped to the same AC queue, The same AC different TID queue cache information is set and reported in the form of an AC queue cache, thus saving the overhead compared to the manner in which each TID is reported once.

After receiving the radio frame, the radio frame receiving end adjusts the radio frame receiving end transmission control setting according to the preset network policy according to the status information of the radio station;

Based on the sending cache information of the wireless station, the AP can know how many stations in the associated site need to send data, and the size of the cache queue that each station needs to send. Therefore, the AP obtains the transmission opportunity, and the scheduling station performs uplink multi-user transmission. The AP may perform scheduling according to the sending status information of the station. An optional solution is that the station that needs to send a large data queue allocates more bandwidth resources, and the small station that transmits the data queue allocates less bandwidth resources to achieve reasonable allocation of resources. And in the next time the user is scheduled, the bandwidth allocated to each user is indicated in the trigger frame. source.

In practical applications, the sending module 1101 and the setting module 1102 may be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA) of a wireless station. And so on.

As shown in FIG. 12, the device includes: a receiving module 1201, a second obtaining module 1202, and an adjusting module 1203, where

The receiving module 1201 is configured to receive a radio frame.

The second obtaining module 1202 is configured to obtain the reported wireless station status information in a specified domain of the radio frame.

The adjusting module 1203 is configured to adjust the transmission control setting according to the preset network policy according to the status information of the wireless station.

Here, the wireless station status information reporting receiving device may be an AP in the BBS or a non-AP wireless station in the wireless frame receiving end of the IBBS. In the wireless station status information reporting process, the wireless station status information reporting device first acquires the status information of the wireless station;

The status information herein includes receiving buffer information and/or transmitting buffer information; typically, in the BSS, one AP is associated with multiple wireless stations. The AP sends downlink multi-user data to multiple wireless stations. In the high-speed transmission scenario, the receiving buffer of the wireless station may become full. And, in order to prevent the receiving buffer overflow of the wireless station, it is required to report the receiving buffer in real time. At the same time, since the data in the sending queue of the wireless station needs to be sent, it is necessary to arrange the resource more reasonably according to the sending buffer information of the queue next time. The sending buffer information of the wireless station is reported; the receiving and receiving buffer information of the wireless station itself may be obtained by the wireless frame sending end; where the receiving buffer information and/or the sending buffer information includes: receiving buffer information of the station And/or sending buffer information, or receiving buffer information and/or sending buffer information of each AC queue, or receiving buffer information and/or sending buffer information of each TID; receiving buffer information and/or sending buffer information of the site includes The size of the receiving buffer queue or the size of the sending buffer queue currently stored by the station, and the receiving buffer information and/or the sending buffer information of each access category refers to receiving buffer information corresponding to one or more ACs and/or Sending cache information; the TID receiving buffer information and/or sending buffer information refers to a The receiving buffer information and/or the sending buffer information corresponding to the multiple TIDs; the receiving buffer information may include: length information indicating the current receiving buffering information, indicating the granularity information of the currently received buffering information, and the size of the receiving buffer is passed The product of length and granularity is used to indicate that the granularity can be characterized in bytes. Here, the receiving buffer information may be the received receiving buffer information, or may be the remaining available receiving buffer information, etc.; the sending buffer information may include: length information indicating the current sending buffer information, used to indicate the current sending The granularity information of the cached information. The size of the send buffer is represented by the product of length and granularity, and the granularity can be characterized in units of bytes. Here, the sending buffer information may be the allocated sending buffer information, or may be the remaining available sending buffer information, etc.; the sending buffer information refers to the size of the data queue that needs to be sent, and may be based on the site, based on Into the category AC

The wireless station status information reporting transmitting device sets the status information of the wireless station to a specified domain in the wireless frame, and reports the wireless frame to the wireless station status information reporting device;

The wireless station status information reporting receiving apparatus may include: an AP, or an IBSS a wireless station may send its own status information to the AP, or a wireless station in the IBSS that performs wireless transmission with itself; the following is an example of the technical solution of the present invention by using the status information sent by the AP in the BSS as an example;

Specifically, the status information may be set to an HT control domain in a radio frame, and/or a QoS control domain, and/or a site association identifier AID field in a unicast multi-TID BA frame, and the like in some radio frames. a domain; wherein the HT control domain may be an HT control region of a data frame, and the QoS control region may be a QoS control region of a data frame, where the specified domain may be in a data signal such as a data frame or a radio frame, in some Reserved or unused space in use, in which case the specified domain can be reused for other functions and can be used to set up additional information.

Optionally, the specified domain may be divided into one or more subdomains, where the divided subdomain includes: an information value subdomain; where the information value subdomain may be used to set the wireless site. Status information; when setting the cache information, you can set the length information of the cache, and / Or granularity information; when only the length information of the cache is set, the granularity information may default to 256 bytes in the wireless transmission protocol.

user priority

After receiving the radio frame, the wireless station status information reporting receiving device adjusts the target communication end transmission control setting according to the preset network policy according to the status information of the wireless station;

Here, the wireless station status information reporting receiving device may pre-set the network policy according to information such as its own transmission speed, cache size, and the like; the preset network policy includes: adjusting the AP transmission control setting such as the aggregated data packet length of the AP. In order to adapt to the state of the AP and the wireless station; the prior art includes the network policy for the AP to adjust the AP after receiving the status information of the wireless station, where the existing network policy may also be used for adjustment;

Based on the sending cache information of the wireless station, the AP can know how many stations in the associated site need to send data, and the size of the cache queue that each station needs to send. Therefore, the AP obtains the transmission opportunity, and the scheduling station performs uplink multi-user transmission. The AP may perform scheduling according to the sending status information of the station. An optional solution is that the station that needs to send a large data queue allocates more bandwidth resources, and the small station that transmits the data queue allocates less bandwidth resources to achieve reasonable allocation of resources. And the bandwidth resource allocated to each user is indicated in the trigger frame when the user is scheduled next time.

After receiving the radio frame with the status information sent by the radio station, the AP may first parse the information type sub-domain, and determine the sub-domain of the subsequent information value according to the information type indication. After the information value subdomain is successfully parsed, the AP may adjust the sending policy according to the receiving cache information and/or the sending buffer information of the wireless station at the next data transmission. If the receiving buffer space is large, the link status is good, and the length of the aggregated data packet can be increased. Otherwise, the link status is compared. Poor, the incomplete MSDU with too much backlog in the receive buffer, in which case the length of the aggregated data packet can be shortened to improve the success rate of the transmission;

In an actual application, the receiving module 1201, the second obtaining module 1202, and the adjusting module 1203 may be implemented by an AP, a CPU of a wireless station, an MPU, a DSP, or an FPGA.

Embodiments of the present invention also provide a storage medium. Optionally, in this embodiment, the foregoing storage medium stores an execution instruction, where the execution instruction is used to perform one or a combination of the steps in the foregoing method embodiments.

Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Industrial applicability

As described above, the method and apparatus for reporting wireless station status information provided by the embodiments of the present invention have the following beneficial effects: by transmitting a radio frame; setting status information of the radio station in a specified domain of the radio frame; The status information of the site is used to trigger the radio frame receiving end to adjust the transmission control setting according to the preset network policy. In this way, the wireless station status information, especially the receiving buffer information and/or the sending buffer information, is multiplexed into the wireless frame, which saves network overhead and improves timeliness, and the accurate state information provided improves the accuracy of the reported information; Optionally, the radio frame receiving end adjusts the transmission control setting according to the cache information included in the status information, thereby improving network transmission efficiency.

Claims

A wireless station status information reporting method, the method comprising:

Send a wireless frame;

The status information of the wireless station is set in a specified domain of the wireless frame.
The method of claim 1, wherein the setting the status information of the wireless station in the designated domain of the wireless frame comprises: setting receive buffer information of the wireless station and/or setting in a specified domain of the wireless frame Sending cache information;

The receiving buffer information and/or the sending buffer information includes: receiving buffer information and/or sending buffer information of the station, or receiving buffer information and/or sending buffer information of each access category AC queue, or each communication identifier TID. Receive cached information and/or send cached information.
The method of claim 2, wherein the setting the status information of the wireless station in the designated domain of the wireless frame comprises: setting the status information of the wireless station to the high throughput HT control domain, and / Or a Quality of Service QoS Control Domain, and/or a unicast multiple TID block acknowledgment of the Site Association Identifier AID field in the BA frame, and/or a domain added with the added site status information in the radio frame.
The method according to claim 3, wherein the setting the status information of the wireless station in the specified domain of the radio frame comprises: respectively receiving the buffer information corresponding to each TID in the unicast multi-TIDBA frame and / or send buffer information set to the AID field corresponding to each TID.
The method according to claim 3, wherein the newly added field of the station status information in the radio frame comprises: adding a field for reporting the status information of the station in the enhanced multi-TID BA frame format, and based on the TID or The site-based receive/send cache information is set to the newly added site status information field.
The method of claim 1, wherein the setting the status information of the wireless station in the designated domain of the wireless frame comprises:

And dividing the specified domain into more than one subdomain, where the divided subdomain includes: an information value subdomain;

The status information is set in the information value subfield.
The method of claim 6, wherein the divided sub-domain further comprises: an information type sub-domain;

Setting type information in the information type subdomain;

The type information is used to indicate the type of the status information set in the sub-domain of the information value, and/or the identification information of the status information.
The method according to any one of claims 2 to 7, wherein the receiving the content of the cache information comprises: receiving buffer length information, and/or receiving cache granularity information;

The content of the sending cache information includes: sending buffer length information, and/or sending buffer granularity information.
The method according to any one of claims 1 to 7, wherein before the setting of the status information of the wireless station in the designated domain of the radio frame, the method further comprises: acquiring status information of the wireless station.
A wireless station status information reporting method, the method comprising:

Receiving a radio frame;

Obtaining the reported wireless station status information in a specified domain of the radio frame;

Adjusting the transmission control settings according to the preset network policy according to the status information of the wireless station.
The method of claim 10, wherein the obtaining the reported wireless station status information in a specified domain of the radio frame comprises: acquiring, in a specified domain of the radio frame, receiving buffer information of the wireless station and/or Or send cache information;

The receiving buffer information and/or the sending buffer information includes: receiving buffer information and/or sending buffer information of the site, or receiving buffer information and/or sending buffer information of each AC queue, or receiving buffer information of each TID and/or Send cached information.
The method according to claim 10, wherein the obtaining the reported wireless station status information in a specified domain of the radio frame comprises: in an HT control field of a radio frame, And/or the QoS control domain, and/or the AID domain in the unicast multi-TID BA frame acquires the wireless station status information.
A wireless station status information reporting and transmitting device, the device comprising: a sending module and a setting module; wherein

The sending module is configured to send a radio frame;

The setting module is configured to set status information of the wireless station in a specified domain of the wireless frame.
The device according to claim 13, wherein the setting module is specifically configured to: set receiving buffer information and/or send buffer information of the wireless station in a specified domain of the wireless frame;

The receiving buffer information and/or the sending buffer information includes: receiving buffer information and/or sending buffer information of the site, or receiving buffer information and/or sending buffer information of each AC queue, or receiving buffer information of each TID and/or Send cached information.
The apparatus according to claim 14, wherein the setting module is specifically configured to: set status information of the wireless station to an HT control domain, and/or a QoS control domain, and/or a unicast multi-TID BA frame. The newly added site status information reporting field in the AID field, and/or the enhanced multi-TID BA frame.
The apparatus according to claim 15, wherein the setting module is specifically configured to: respectively set, in a unicast multi-TID BA frame, receive buffer information and/or send buffer information corresponding to each TID to each TID Corresponding AID domain.
The apparatus according to claim 16, wherein the setting module is specifically configured to: add a domain that adds the site status information to the enhanced multi-TID BA frame, and the TID or the site-based receiving buffer information and/or Or send the cache information to the newly added site status information field.
The device according to claim 13, wherein the setting module is specifically configured to:

And dividing the specified domain into more than one subdomain, where the divided subdomain includes: an information value subdomain;

The status information is set in the information value subfield.
The apparatus according to claim 18, wherein said divided subdomain further comprises: an information type subfield;

Setting type information in the information type subdomain;

The type information is used to indicate the type of the status information set in the sub-domain of the information value, and/or the identification information of the status information.
The apparatus according to any one of claims 14 to 19, wherein the content of the received cache information comprises: receiving buffer length information, and/or receiving cache granularity information;

The content of the sending cache information includes: sending buffer length information, and/or sending buffer granularity information.
The apparatus according to any one of claims 13 to 19, wherein the apparatus further comprises a first acquisition module, the first acquisition module being arranged to set state information of the wireless station in a specified domain of the wireless frame Obtaining status information of the wireless station.
A wireless station status information reporting receiving device, the device comprising: a receiving module, a second acquiring module, and an adjusting module; wherein

The receiving module is configured to receive a radio frame;

The second acquiring module is configured to obtain the reported wireless station status information in a specified domain of the radio frame;

The adjusting module is configured to adjust the transmission control setting according to the preset network policy according to the status information of the wireless station.
The device according to claim 22, wherein the second obtaining module is specifically configured to: acquire receiving buffer information and/or send buffer information of the wireless station in a specified domain of the wireless frame;

The receiving cache information and/or the sending cache information includes: receiving buffer information of the site And/or sending buffer information, or receiving buffer information and/or sending buffer information of each AC queue, or receiving buffer information and/or sending buffer information of each TID.
The apparatus according to claim 22, wherein the second obtaining module is specifically configured to: an AID field in an HT control domain of a radio frame, and/or a QoS control domain, and/or a unicast multi-TID BA frame. Obtaining the wireless station status information.