CN106559911B - Random competition method, station, access point and system - Google Patents
Random competition method, station, access point and system Download PDFInfo
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- CN106559911B CN106559911B CN201510641393.9A CN201510641393A CN106559911B CN 106559911 B CN106559911 B CN 106559911B CN 201510641393 A CN201510641393 A CN 201510641393A CN 106559911 B CN106559911 B CN 106559911B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0226—Traffic management, e.g. flow control or congestion control based on location or mobility
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
The invention discloses a random competition method, a site, an access point and a system.A site receives indication information sent by the access point, wherein the indication information at least carries resource positions which are distributed by the access point for different types of service frames in advance; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; and carrying out competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to an access point after the service frame to be transmitted successfully competes to a transmission resource. That is to say, the technical solution of the embodiment of the present invention allocates different resource positions to different types of service frames in advance, and a station participates in contention at a resource position corresponding to a service frame to be transmitted, instead of participating in contention only at a resource position where AID is equal to 0, so that the success probability of the station participating in random contention is improved.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a random contention method, a station, an access point, and a system.
Background
In the existing wlan system, uplink data transmission is mainly performed through a random contention mechanism, in the uplink data transmission process, an OFDMA (Orthogonal Frequency Division Multiple Access) technology is introduced, first, an Access Point (AP) sends a trigger frame to a Station (STA) to trigger uplink data transmission, after receiving the trigger frame sent by the AP, the STA can perform contention Access only on a resource block where AID (association identity identification) is equal to 0, and after the contention succeeds, the STA sends a corresponding service frame to the AP.
However, in the above existing uplink data transmission process, at the same time, the STA can only send one type of traffic frame to the AP at a time, that is, the scheme in the prior art aims at the situation that there is only one type of traffic frame, and the type of traffic frame is transmitted on a resource block whose AID is equal to 0, and when there are multiple different types of traffic frames, the multiple different types of traffic frames compete with each other, that is, in the prior art, when there are multiple different types of traffic frames, the multiple different types of traffic frames can only be transmitted on a resource block whose AID is equal to 0, so as to increase the types of traffic frames, the scheme in the prior art can reduce the success probability of contention access of stations.
Disclosure of Invention
In view of this, the present invention provides a random contention method, a station, an access point and a system, which can transmit different types of service frames at the same time, and improve the probability of successful random contention access of the station.
In order to achieve the above object, the embodiment of the present invention provides the following solutions:
a first aspect of an embodiment of the present invention provides a random contention method, including:
a station receives indication information sent by an access point, wherein the indication information at least carries resource positions pre-allocated by the access point for different types of service frames;
determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information;
and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource.
With reference to the first aspect, in a first possible implementation manner of the first aspect, when the service frame to be transmitted includes a data frame, the contending at a resource location corresponding to the service frame to be transmitted includes:
the station receives a packet length threshold value of packet transmission sent by the access point;
judging whether the length of the data frame is smaller than a packet length threshold value of the packet transmission;
if yes, competing on a resource position corresponding to the data frame;
and if not, the station quits the competition.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the contending is performed at a resource location corresponding to the to-be-transmitted service frame, and after the to-be-transmitted service frame successfully contends for a transmission resource, a process of sending the to-be-transmitted service frame to the access point includes:
according to a Carrier Sense Multiple Access (CSMA) competition mechanism with collision avoidance, backoff is carried out on a resource position corresponding to the service frame to be transmitted according to time, and the service frame to be transmitted is sent to the access point after the successful competition of the service frame to be transmitted to a transmission resource is confirmed;
or; and according to a distributed contention access ODCA contention mechanism based on orthogonal frequency division multiple access, performing backoff on a time-frequency resource block at a resource position corresponding to the service frame to be transmitted, and after confirming that the service frame to be transmitted successfully competes to a transmission resource, transmitting the service frame to be transmitted to the access point.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the determining, according to the resource locations allocated to the different types of service frames in the indication information, resource locations corresponding to the service frames to be transmitted includes:
acquiring a basic service set identity included in the indication information, and judging whether the access point and the station are in the same basic service set according to the basic service set identity;
if yes, determining resource positions corresponding to the service frames to be transmitted according to the resource positions distributed to the service frames of different types in the indication information;
and if not, the station quits the competition.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes:
and respectively adding frame end marks and/or length information of signal expansion in the service frames to be transmitted, which are transmitted on the corresponding transmission resource positions, based on the size of the transmission resources, which are carried in the indication information and are allocated to the service frames of different types in advance.
A second aspect of the embodiments of the present invention provides a random contention method, including:
an access point sends indication information to a station, wherein the indication information at least carries resource positions which are allocated for different types of service frames in advance, so that the station competes at the resource positions corresponding to the service frames to be transmitted;
and after the station successfully competes for the service frame to be transmitted to the transmission resource, receiving the service frame to be transmitted sent by the station at the corresponding transmission resource position.
With reference to the second aspect, in a first possible implementation manner of the second aspect, before sending the indication information to the station, the method further includes:
and allocating different resource positions for the different types of service frames according to the service requests of the different types of service frames.
With reference to the second aspect, in a second possible implementation manner of the second aspect, the method further includes: and the access point sends a packet length threshold value of packet transmission to the station.
With reference to the second aspect, in a third possible implementation manner of the second aspect, before sending the indication information to the station, the method further includes:
estimating the size of resources required by the transmission of different types of service frames according to the historical information, wherein the indication information sent to the station correspondingly further comprises: the method comprises the steps of allocating transmission resource sizes for different types of service frames in advance, and enabling the stations to add frame end marks and/or length information of signal expansion in the service frames to be transmitted which are transmitted at the corresponding transmission resource positions respectively based on the transmission resource sizes allocated for the different types of service frames in advance.
A third aspect of an embodiment of the present invention provides a station, including:
a first receiving unit, configured to receive indication information sent by an access point, where the indication information at least carries a resource location pre-allocated by the access point for different types of service frames;
a determining unit, configured to determine resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information;
a competition unit, configured to perform competition at a resource location corresponding to the service frame to be transmitted;
and the first sending unit is used for sending the successfully contended service frame to the access point after the successfully contending service frame to be transmitted to the transmission resource.
With reference to the third aspect, in a first possible implementation manner of the third aspect, when the traffic frame to be transmitted includes a data frame, the contention unit includes:
a second receiving unit, configured to receive a packet length threshold of a packet transmission sent by the access point;
the judging unit is used for judging whether the length of the data frame is smaller than a packet length threshold value of the packet transmission;
the execution unit is used for carrying out competition on a resource position corresponding to the data frame when the judging unit judges that the length of the data frame is smaller than the packet length threshold value of the packet transmission; otherwise, the station quits the competition.
With reference to the third aspect, in a second possible implementation manner of the third aspect, the contention unit is configured to perform backoff on a resource location corresponding to the to-be-transmitted service frame according to a CSMA contention mechanism;
the first sending unit is used for sending the service frame to be transmitted to the access point after confirming that the service frame to be transmitted successfully competes for transmission resources;
or;
the competition unit is used for carrying out backoff on a time-frequency resource block at a resource position corresponding to the service frame to be transmitted according to an ODCA competition mechanism;
the first sending unit is configured to send the service frame to be transmitted to the access point after confirming that the service frame to be transmitted successfully competes for a transmission resource.
With reference to the third aspect, in a third possible implementation manner of the third aspect, the determining unit is configured to obtain a basic service set identity included in the indication information, and determine, according to the basic service set identity, whether the access point and the station are in the same basic service set; if yes, determining resource positions corresponding to the service frames to be transmitted according to the resource positions distributed to the service frames of different types in the indication information; and if not, the station quits the competition.
With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the adding unit is configured to add, based on the size of transmission resources, which are carried in the indication information and are allocated to different types of service frames in advance, a frame end flag and/or length information of signal extension respectively in the service frame to be transmitted, which is transmitted at a corresponding transmission resource position.
A fourth aspect of an embodiment of the present invention provides a station, including: the device comprises a memory used for storing a random competition program and a processor connected with the memory;
the processor is configured to execute the random contention procedure, specifically, to receive indication information sent by an access point, where the indication information at least carries a resource location pre-allocated by the access point for different types of service frames; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource.
A fifth aspect of an embodiment of the present invention provides an access point, including:
a second sending unit, configured to send indication information to a station, where the indication information at least carries resource locations that are pre-allocated for different types of service frames, so that the station competes at a resource location corresponding to a service frame to be transmitted;
and a third receiving unit, configured to receive, at a corresponding transmission resource location, the service frame to be transmitted sent by the station after the station successfully competes for the transmission resource for the service frame to be transmitted.
With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the method further includes: and the allocation unit is used for allocating different resource positions for the different types of service frames according to the service requests of the different types of service frames.
With reference to the fifth aspect, in a second possible implementation manner of the fifth aspect, the second sending unit is further configured to: and sending a packet length threshold value of packet transmission to the station.
With reference to the fifth aspect, in a third possible implementation manner of the fifth aspect, the method further includes:
an estimating unit, configured to estimate, according to history information, sizes of resources required for transmission of different types of service frames, where, correspondingly, the indication information sent to the station by the second sending unit further includes: the size of transmission resources allocated in advance for different types of traffic frames. .
A sixth aspect of an embodiment of the present invention provides an access point, including: the device comprises a memory used for storing a random competition program and a processor connected with the memory; the processor is configured to execute the random contention procedure, and specifically, to send indication information to a station, where the indication information at least carries resource locations that are pre-allocated to different types of service frames, so that the station performs contention on a resource location corresponding to a service frame to be transmitted; and after the station successfully competes for the service frame to be transmitted to the transmission resource, receiving the service frame to be transmitted sent by the station at the corresponding transmission resource position.
A seventh aspect of the embodiments of the present invention provides a random contention system, including:
a station as described above, and an access point as described above.
According to the technical scheme, compared with the prior art, the invention discloses a random competition method, a station, an access point and a system, wherein the station receives indication information sent by the access point, and the indication information at least carries resource positions which are allocated by the access point for different types of service frames in advance; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource. That is to say, the technical solution of the embodiment of the present invention is to allocate different resource positions to different types of service frames in advance, where the station participates in contention at the resource position corresponding to the service frame to be transmitted, instead of participating in contention only at the resource position where AID is equal to 0, so as to improve the success probability of the station participating in random contention.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it should be apparent that the drawings in the following description are only drawings of some embodiments of the present application.
FIG. 1 is a schematic flow chart of an embodiment 1 of a random competition method disclosed in the present invention;
FIG. 2 is a schematic diagram of a frame structure according to the present invention;
FIG. 3 is a schematic diagram of another frame structure disclosed in the present invention;
FIG. 4 is a schematic diagram of another frame structure disclosed in the present invention;
FIG. 5 is a flow chart of an embodiment 2 of a random competition method according to the present invention;
FIG. 6 is a diagram of another frame structure disclosed in the present invention;
FIG. 7 is a flow chart of an embodiment 3 of a random contention method according to the present invention;
fig. 8 is a schematic structural diagram of a station in accordance with an embodiment 4 of the present disclosure;
fig. 9 is a schematic structural diagram of an access point according to embodiment 5 of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely descriptive of the invention in its embodiments for distinguishing between objects of the same nature. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
As known from the background art, in the existing wireless lan system, uplink data transmission is mainly performed through a random contention mechanism, and in the prior art, aiming at the situation that only one type of service frame participates in contention, the random contention mechanism is adopted: the AP sends a trigger frame to the STA to trigger uplink data transmission, after receiving the trigger frame sent by the AP, the STA performs contention access on a resource block with AID equal to 0, and only after the contention succeeds, the STA sends a corresponding service frame to the AP. When there are multiple different types of service frames, the multiple different types of service frames can be transmitted only on the resource block whose AID is equal to 0, but not on other resource blocks. That is, as the types of the service frames increase, the positions of competition participation are not increased, so that the probability of success of random competition of the stations is reduced.
Therefore, the embodiment of the present invention provides a random contention method, where a station receives indication information sent by an access point, where the indication information at least carries a resource location pre-allocated by the access point for different types of service frames; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource. That is to say, the technical solution of the embodiment of the present invention is to allocate different resource positions to different types of service frames in advance, where the station participates in contention at the resource position corresponding to the service frame to be transmitted, instead of participating in contention only at the resource position where AID is equal to 0, so as to improve the success probability of the station participating in random contention.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, a random contention method according to embodiment 1 of the present invention is implemented by a station, and the method includes:
s101: a station receives indication information sent by an access point;
the indication information at least carries resource positions pre-allocated by the access point for different types of service frames, and the indication information may be indicated by an HE-SIG-B (High efficiency Signal B Field) on a physical layer, or may be indicated by adding a Field on an MAC layer, which is not limited in the embodiments of the present invention. The indication information may be TFR indication information, that is, indication information is carried in a TFR frame, or indication information is carried in other frames, which is not limited in this embodiment of the present invention.
Specifically, please refer to fig. 2, which is a schematic diagram of a frame structure in which an indication information is carried by an HE-SIG-B in a TFR frame in a physical layer according to an embodiment of the present invention, wherein the HE-SIG-B in the TFR frame carries a resource location RU indication that is allocated by an access point in advance for different types of service frames, and the HE-SIG-a (High efficiency signal a Field, signaling a of a High efficiency packet) in the TFR frame may also carry a basic service set identity BSS color. Wherein, the Legacy preamble in the TFR frame is a Legacy preamble.
Please refer to fig. 3, which is a schematic diagram of a frame structure according to an embodiment of the present invention, in which a field is added in an MAC layer to carry indication information, a PHY preamble in a TFR frame indicates a physical layer preamble, an MAC header indicates an MAC layer header field, a Packet length indicates a length of the frame, and an RU indication indicates a resource location that is pre-allocated by an access point for different types of service frames.
The resource position, which is carried in the indication information and is allocated by the access point to the different types of service frames in advance, is resource allocation information, which is a range of resource blocks, which are allocated by the access point to the different types of service frames in advance and are used in a contention access process, and the following several ways are specifically adopted to indicate the range of the resource blocks, but the embodiment of the present invention is not limited to the following several ways:
one is as follows: marking the initial number of the resource blocks respectively occupied by each different type of service frame and the number of the continuously occupied resource blocks;
the second step is as follows: marking the type of the service frame for each resource block;
and thirdly: and indicating the range of the resource blocks allocated to the different types of service frames by AID, wherein if the resource block identifier AID allocated to the association request service frame is 0, the resource block identifier AID allocated to the bandwidth request service frame is 1, and the resource block identifier AID allocated to the small packet is 2.
It should be noted that, because it is necessary to keep lengths of the transmitted service frames consistent when transmitting the different types of service frames, that is, it is ensured that the transmission of all the service frames starts at the same time and ends at the same time, for this reason, the indication information received by the station in the embodiment of the present invention, which is sent by the access point, needs to carry a size of the transmission resource allocated to the different types of service frames in advance. Referring to fig. 4, for the embodiment of the present invention, the size of the transmission resource allocated in advance for different types of service frames, i.e. the range of packet lengths that can be transmitted by different types of service frames, is indicated by the length in the SIGNAL in the Legacy preamble, where the SIGNAL represents the signaling field in the Legacy preamble, and the length represents the length of the frame.
The meaning of each field of the frame structure in said fig. 4 is as follows: PLCP preamble represents a physical layer preamble, RATE represents a transmission RATE of a DATA portion, Reserved is a Reserved field, Length is a Length of a frame, Parity is a check field, Tail is a Tail field of a SIGNAL or DATA portion, SERVICE is a SERVICE field, PSDU is a physical layer encapsulated packet, Pad bits is a physical layer padding field, and SIGNAL is a signaling field.
The embodiment of the present invention may also carry, through other frames or other fields, the size of the transmission resource pre-allocated to the different types of service frames, which is not limited in any way.
The embodiment of the present invention may add a frame end mark and/or signal extension length information to the to-be-transmitted service frame, which is transmitted at the corresponding transmission resource position, respectively based on the size of the transmission resource carried in the indication information and allocated in advance for the different types of service frames, so as to ensure the length consistency of the to-be-transmitted service frames, where the frame end mark is used to indicate the end of service frame transmission, and the signal extension length information is used to fill the length of the service frame, and may be represented by a random number.
S102: determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information;
specifically, by acquiring the indication information, resource positions corresponding to the service frames to be transmitted are determined according to resource positions allocated to the different types of service frames in the indication information.
Preferably, after receiving indication information sent by an access point, a station first determines whether the access point and the station are in the same basic service set according to a basic service set identity carried in the indication information, and if so, determines resource positions corresponding to service frames to be transmitted according to resource positions allocated to different types of service frames in the indication information; and if not, the station quits the competition.
S103: competing at the resource position corresponding to the service frame to be transmitted;
specifically, based on the resource positions allocated to the different types of service frames carried in the indication information, the station performs contention on the resource position corresponding to the service frame to be transmitted, and specifically may adopt the following contention mechanism:
one is as follows: according to a CSMA (Carrier Sense Multiple Access with Collision Avoidance) competition mechanism, a station backs off at a resource position corresponding to a service frame to be transmitted according to time, and performs competition, specifically, each time a resource block is allocated to the station (the number of the resource blocks allocated each time is not limited), a backoff counter of the station is decreased by 1, and when the backoff counter is decreased to 0, success of the competition is indicated.
Secondly, according to an ODCA (orthogonal frequency division multiple Access) competition mechanism, the station backs off on a time-frequency resource block at a resource position corresponding to the service frame to be transmitted, namely, the station is allocated with the resource block each time, a backoff counter of the station subtracts the number of the allocated resource blocks, and when the backoff counter is reduced to be equal to or less than 0, competition is successful; or, each time a station is allocated a resource block (the number of resource blocks allocated each time is not limited), the backoff counter of the station is decremented by 1 every time the station encounters one allocated resource block, and when the backoff counter is decremented to 0, the contention is successful.
S104: and after the successful competition of the service frame to be transmitted to the transmission resource, the service frame to be transmitted is sent to the access point.
And based on the contention mechanism, after confirming that the service frame to be transmitted successfully contends for a transmission resource, sending the service frame to be transmitted to the access point.
In the random contention method disclosed in embodiment 1 of the present invention, a station receives indication information sent by an access point, where the indication information at least carries resource locations pre-allocated by the access point for different types of service frames; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource. That is to say, the technical solution of the embodiment of the present invention is to allocate different resource positions to different types of service frames in advance, where the station participates in contention at the resource position corresponding to the service frame to be transmitted, instead of participating in contention only at the resource position where AID is equal to 0, so as to improve the success probability of the station participating in random contention.
Referring to fig. 5, a flowchart of a random contention method according to embodiment 2 of the present invention is provided, where the method is executed by a station, and when a service frame to be transmitted includes a data frame, the method in the embodiment of the present invention includes:
s201: a station receives indication information sent by an access point and a packet length threshold value of packet transmission;
the indication information may be TFR indication information, that is, indication information is carried in a TFR frame, or indication information is carried in other frames, which is not limited in this embodiment of the present invention. The indication information carries resource positions which are allocated by the access point for different types of service frames in advance.
The packet length threshold for packet transmission may be carried by TFR indication information or by Beacon frames, which is not limited in this embodiment of the present invention. Referring to fig. 6, a packet length Threshold of packet transmission is described by adding a field in a Beacon frame, where a Threshold for small packet in the Beacon frame indicates the packet length Threshold of packet transmission. Since this threshold does not change frequently, it can be transmitted through Beacon frames, thereby reducing the content of each TFR indication information transmission.
S202: determining a resource position corresponding to the data frame according to resource positions allocated to different types of service frames in the indication information;
the above S201 to S202 are the same as the contents disclosed in S101 to S102 in the first embodiment of the present invention, and since the contents of this portion are described in detail in the first embodiment of the method, the embodiment of the present invention is not described again.
S203: judging whether the length of the data frame is smaller than a packet length threshold value of the packet transmission, if so, entering S204, and if not, entering S206;
the data frame comprises packet services with small data volume, and the packet services have small data volume but large quantity, but the scheme of the prior art does not distinguish the packet services with small data volume, but uses the packet services as normal data frames to be transmitted according to a normal data frame transmission flow, and the packet services have small data volume, and the AP scheduling in the prior art is scheduled according to the size of a normal data packet, so that the scheduling overhead is generated; moreover, transmitting a small packet service with a small data volume according to a normal data frame transmission flow also causes a waste of transmission time. Therefore, in the prior art, the scheduling overhead and the time waste in packet service transmission can reduce the transmission efficiency of the packet service, and in the transmission process, when a large amount of packet service participates in competition as a normal data frame, a control frame and a management frame, the transmission efficiency of the control frame and the management frame can be greatly reduced.
Therefore, embodiment 2 in the present application discloses that when the service frame to be transmitted includes a data frame, packet services in the data frame need to be distinguished, that is, whether the data frame to be transmitted is a packet service is determined by comparing the length of the data frame to be transmitted with a packet length threshold value of packet transmission, and if the length of the data frame is determined to be smaller than the packet length threshold value of packet transmission, the data frame is determined to be a packet service, and a corresponding resource position is allocated to the data frame, so that the data frame competes at the corresponding resource position. And the transmission process is not transmitted according to the normal data frame transmission flow, but the packet service is transmitted on the corresponding transmission resource position in the process that the station reports the information to the AP after the AP sends the trigger information, rather than being transmitted after waiting for the AP to send the trigger information again.
S204, competing on the resource position corresponding to the data frame;
s205: after the data frame successfully competes for transmission resources, sending the data frame to the access point;
and S206, the station quits the competition.
In the random contention method disclosed in embodiment 2 of the present invention, when the service frame to be transmitted includes a data frame, a station receives indication information sent by an access point and a packet length threshold for packet transmission; determining the resource position corresponding to the data frame according to the resource positions allocated to the different types of service frames; and judging whether the length of the data frame is smaller than a packet length threshold value of the packet transmission, and if so, competing the data frame on a resource position corresponding to the data frame. Therefore, in the embodiment of the present invention, when the service frame to be transmitted includes a data frame, the packet services in the data frame need to be distinguished, and corresponding resource positions are allocated to the packet services, so that the packet services compete at the corresponding resource positions, and a phenomenon that the packet services compete with other service frames for transmission resources is avoided. The transmission efficiency of the packet service is improved, and the transmission efficiency of other service frames is further improved.
The random contention method according to the present invention is described above from the station side in the embodiment of the present invention, and next, the random contention method according to the present invention is described from the access point side, please refer to fig. 7, which is a flowchart of another random contention method provided in embodiment 3 of the present invention, where the method is executed by the access point, and the method includes:
s310: the access point sends indication information to the station;
specifically, in S301, the access point sends indication information to the station, where the indication information at least carries resource locations pre-allocated for different types of service frames, so that the station competes at a resource location corresponding to a service frame to be transmitted, and the indication information further includes: and the station judges whether the access point and the station are in the same basic service set according to the basic service set identity carried in the indication information, if so, determines the resource positions corresponding to the service frames to be transmitted according to the resource positions distributed to the service frames of different types in the indication information, and if not, the station exits the competition.
Before sending the indication information to the station, the method further includes: and allocating different resource positions for the different types of service frames according to the service requests of the different types of service frames.
Before sending the indication information to the station, the method further comprises: estimating the size of resources required by the transmission of different types of service frames according to the historical information, wherein the indication information sent to the station correspondingly further comprises: the method comprises the steps of allocating transmission resource sizes for different types of service frames in advance, and enabling the stations to add frame end marks and/or length information of signal expansion in the service frames to be transmitted which are transmitted at the corresponding transmission resource positions respectively based on the transmission resource sizes allocated for the different types of service frames in advance.
It should be noted that, when the service frame to be transmitted includes a data frame, the access point further sends a packet length threshold for packet transmission to the station, so that the station distinguishes packet services in the data frame, even if the station determines whether the data frame to be transmitted is a packet service by comparing the length of the data frame to be transmitted with the packet length threshold for packet transmission, if it is determined that the length of the data frame is smaller than the packet length threshold for packet transmission, the station determines that the data frame is a packet service, allocates a corresponding resource location for the data frame, and performs contention on the corresponding resource location.
S302: and after the station successfully competes for the service frame to be transmitted to the transmission resource, receiving the service frame to be transmitted sent by the station at the corresponding transmission resource position.
In the random contention method disclosed in embodiment 3 of the present invention, indication information sent by an access point to a station at least carries resource locations that are allocated in advance for different types of service frames, so that the station determines, according to the resource locations allocated for the different types of service frames in the indication information, resource locations corresponding to the service frames to be transmitted, respectively; and the station carries out competition on a resource position corresponding to the service frame to be transmitted, and sends the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes for transmission resources. That is to say, the technical solution of the embodiment of the present invention is that the access point pre-allocates different resource locations for different types of service frames, so that the station participates in contention at the resource location corresponding to the service frame to be transmitted, instead of participating in contention only at the resource location where AID is equal to 0, thereby improving the success probability of the station participating in random contention.
The method is described in detail in the above embodiment of the present invention, and the method of the present invention can be implemented by using devices in various forms, so that a station is also disclosed in the embodiment of the present invention, and specific embodiments are described in detail below.
Referring to fig. 8, a schematic structural diagram of an embodiment 4 of a station disclosed in the embodiment of the present invention is shown, where the station specifically includes the following units:
a first receiving unit 11, configured to receive indication information sent by an access point, where the indication information at least carries a resource location pre-allocated by the access point for different types of service frames;
a determining unit 12, configured to determine resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information;
a competition unit 13, configured to perform competition at a resource location corresponding to the service frame to be transmitted;
a first sending unit 14, configured to send a successfully contended service frame to the access point after successfully contending for the service frame to be transmitted to the transmission resource.
It should be noted that the contention unit 13 is configured to back off at a resource location corresponding to the service frame to be transmitted according to a carrier sense multiple access CSMA contention mechanism with collision avoidance;
the first sending unit 14 is configured to send the service frame to be transmitted to the access point after confirming that the service frame to be transmitted successfully competes for the transmission resource;
or;
the contention unit 13 is configured to backoff on a time-frequency resource block at a resource position corresponding to the service frame to be transmitted according to an ODCA contention mechanism;
the first sending unit 14 is configured to send the service frame to be transmitted to the access point after confirming that the service frame to be transmitted successfully competes for the transmission resource.
It should be noted that, the determining unit 12 is configured to obtain a basic service set identity included in the indication information, and determine whether the access point and the station are in the same basic service set according to the basic service set identity; if yes, determining resource positions corresponding to the service frames to be transmitted according to the resource positions distributed to the service frames of different types in the indication information; and if not, the station quits the competition.
It should be noted that, when the service frame to be transmitted includes a data frame, the contention unit 13 includes:
a second receiving unit, configured to receive a packet length threshold of a packet transmission sent by the access point;
the judging unit is used for judging whether the length of the data frame is smaller than a packet length threshold value of the packet transmission;
the execution unit is used for carrying out competition on a resource position corresponding to the data frame when the judging unit judges that the length of the data frame is smaller than the packet length threshold value of the packet transmission; otherwise, the station quits the competition.
Based on the above device, the embodiment of the present invention may further select a suitable unit from the following units to form a new station, and the specific forming manner may be determined according to the related description in the method embodiment, which is not described again in the embodiment of the present invention.
And the adding unit is used for respectively adding a frame ending mark and/or length information of signal expansion in the service frame to be transmitted, which is transmitted at the position of the corresponding transmission resource, based on the size of the transmission resource carried in the indication information and allocated to the service frames of different types in advance.
The embodiment of the invention also discloses another station, which comprises: the device comprises a memory used for storing a random competition program and a processor connected with the memory; the processor is configured to execute the random contention procedure, specifically, to receive indication information sent by an access point, where the indication information at least carries a resource location pre-allocated by the access point for different types of service frames; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource.
In a station disclosed in embodiment 4 of the present invention, the station receives indication information sent by an access point, where the indication information at least carries resource locations pre-allocated by the access point for different types of service frames; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource. That is to say, the technical solution of the embodiment of the present invention is to allocate different resource positions to different types of service frames in advance, where the station participates in contention at the resource position corresponding to the service frame to be transmitted, instead of participating in contention only at the resource position where AID is equal to 0, so as to improve the success probability of the station participating in random contention.
The invention also discloses an access point, and specific embodiments are given below for detailed description.
Referring to fig. 9, a schematic structural diagram of an access point embodiment 5 disclosed in the embodiment of the present invention is shown, where the access point specifically includes the following units:
a second sending unit 21, configured to send instruction information to a station;
it should be noted that the indication information sent by the second sending unit 21 to the station at least carries resource positions allocated to different types of service frames in advance, so that the station competes at the resource position corresponding to the service frame to be transmitted. The second sending unit is further configured to: and sending the packet length threshold value of the packet transmission to the station.
A third receiving unit 22, configured to receive the service frame to be transmitted sent by the station at a corresponding transmission resource position after the station successfully competes for the transmission resource for the service frame to be transmitted.
Based on the above device, the embodiment of the present invention may further select a suitable unit from the following units to form a new station, and the specific forming manner may be determined according to the related description in the method embodiment, which is not described again in the embodiment of the present invention.
And the allocation unit is used for allocating different resource positions for the different types of service frames according to the service requests of the different types of service frames.
An estimating unit, configured to estimate, according to history information, sizes of resources required for transmission of different types of service frames, where, correspondingly, the indication information sent by the second sending unit 21 to the station further includes: the size of transmission resources allocated in advance for different types of traffic frames.
The embodiment of the invention also discloses another access point, which comprises: the device comprises a memory used for storing a random competition program and a processor connected with the memory; the processor is configured to execute the random contention procedure, and specifically, to send indication information to a station, where the indication information at least carries resource locations that are pre-allocated to different types of service frames, so that the station performs contention on a resource location corresponding to a service frame to be transmitted; and after the station successfully competes for the service frame to be transmitted to the transmission resource, receiving the service frame to be transmitted sent by the station at the corresponding transmission resource position.
It should be noted that specific function implementation of each unit is described in detail in the method embodiment, and will not be described in detail in the apparatus embodiment.
In addition, this embodiment also discloses a random contention system, which includes: a station as described above, and an access point as described above.
In summary, the following steps:
the invention discloses a random competition method, a site, an access point and a system.A site receives indication information sent by the access point, wherein the indication information at least carries resource positions which are distributed by the access point for different types of service frames in advance; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource. That is to say, the technical solution of the embodiment of the present invention is to allocate different resource positions to different types of service frames in advance, where the station participates in contention at the resource position corresponding to the service frame to be transmitted, instead of participating in contention only at the resource position where AID is equal to 0, so as to improve the success probability of the station participating in random contention.
An embodiment of the present invention further provides a computer program product for data processing, which includes a computer-readable storage medium storing program code, where the program code includes instructions for executing the method flow described in any of the foregoing method embodiments. It will be understood by those of ordinary skill in the art that the foregoing storage media include: various non-transitory machine-readable media that can store program code, such as a U-Disk, a removable hard Disk, a magnetic Disk, an optical Disk, a Random-Access Memory (RAM), a Solid State Disk (SSD), or a non-volatile Memory (non-volatile Memory).
It should be noted that the examples provided in this application are only illustrative. For example, the division of the components in the above embodiments may be implemented in other ways. For example, multiple modules or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In addition, the coupling or direct coupling or communication connection between the components shown or discussed may be an indirect coupling or communication connection through some communication interfaces, modules, and may include an electrical connection, a mechanical connection, or other forms of connection.
It will be clear to those skilled in the art that, for convenience and brevity of description, the description of each embodiment has been given with emphasis on the description of the embodiments, and some parts not described in detail in a certain embodiment may be referred to the related description of other embodiments. The features disclosed in the embodiments of the invention, in the claims and in the drawings may be present independently or in combination. Features described in hardware in embodiments of the invention may be implemented by software and vice versa. And are not limited herein.
Claims (21)
1. A random contention method, comprising:
a station receives indication information sent by an access point, wherein the indication information at least carries resource positions pre-allocated by the access point for different types of service frames; the resource position is the range of the resource block used in the competitive access process, and the resource positions pre-allocated by the access point for the service frames of different types belong to different resource blocks;
determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information;
and performing competition on a resource position corresponding to the service frame to be transmitted, and sending the service frame to be transmitted to the access point after the service frame to be transmitted successfully competes to a transmission resource.
2. The method according to claim 1, wherein when the traffic frame to be transmitted includes a data frame, the process of contending at a resource location corresponding to the traffic frame to be transmitted includes:
the station receives a packet length threshold value of packet transmission sent by the access point;
judging whether the length of the data frame is smaller than a packet length threshold value of the packet transmission;
if yes, competing on a resource position corresponding to the data frame;
and if not, the station quits the competition.
3. The method according to claim 1 or 2, wherein the process of performing contention on the resource location corresponding to the service frame to be transmitted and sending the service frame to be transmitted to the access point after successfully contending for the service frame to be transmitted to the transmission resource comprises:
according to a Carrier Sense Multiple Access (CSMA) competition mechanism with collision avoidance, backoff is carried out on a resource position corresponding to the service frame to be transmitted according to time, and the service frame to be transmitted is sent to the access point after the successful competition of the service frame to be transmitted to a transmission resource is confirmed;
or; and according to a distributed contention access ODCA contention mechanism based on orthogonal frequency division multiple access, performing backoff on a time-frequency resource block at a resource position corresponding to the service frame to be transmitted, and after confirming that the service frame to be transmitted successfully competes to a transmission resource, transmitting the service frame to be transmitted to the access point.
4. The method according to claim 1, wherein the determining, according to the resource locations allocated to the different types of traffic frames in the indication information, the resource locations corresponding to the respective traffic frames to be transmitted comprises:
acquiring a basic service set identity included in the indication information, and judging whether the access point and the station are in the same basic service set according to the basic service set identity;
if yes, determining resource positions corresponding to the service frames to be transmitted according to the resource positions distributed to the service frames of different types in the indication information;
and if not, the station quits the competition.
5. The method of claim 1, further comprising:
and respectively adding frame end marks and/or length information of signal expansion in the service frames to be transmitted, which are transmitted on the corresponding transmission resource positions, based on the size of the transmission resources, which are carried in the indication information and are allocated to the service frames of different types in advance.
6. A random contention method, comprising:
an access point sends indication information to a station, wherein the indication information at least carries resource positions which are allocated for different types of service frames in advance, so that the station competes at the resource positions corresponding to the service frames to be transmitted; the resource position is the range of the resource block used in the competitive access process, and the resource positions pre-allocated by the access point for the service frames of different types belong to different resource blocks;
and after the station successfully competes for the service frame to be transmitted to the transmission resource, receiving the service frame to be transmitted sent by the station at the corresponding transmission resource position.
7. The method of claim 6, further comprising, prior to sending the indication information to the station:
and allocating different resource positions for the different types of service frames according to the service requests of the different types of service frames.
8. The method of claim 6, further comprising: and the access point sends a packet length threshold value of packet transmission to the station.
9. The method of claim 6, further comprising, before sending the indication information to the station:
estimating the size of resources required by the transmission of different types of service frames according to the historical information, wherein the indication information sent to the station correspondingly further comprises: the method comprises the steps of allocating transmission resource sizes for different types of service frames in advance, and enabling the stations to add frame end marks and/or length information of signal expansion in the service frames to be transmitted which are transmitted at the corresponding transmission resource positions respectively based on the transmission resource sizes allocated for the different types of service frames in advance.
10. A station, comprising:
a first receiving unit, configured to receive indication information sent by an access point, where the indication information at least carries a resource location pre-allocated by the access point for different types of service frames; the resource position is the range of the resource block used in the competitive access process, and the resource positions pre-allocated by the access point for the service frames of different types belong to different resource blocks;
a determining unit, configured to determine resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information;
a competition unit, configured to perform competition at a resource location corresponding to the service frame to be transmitted;
and the first sending unit is used for sending the successfully contended service frame to the access point after the successfully contending service frame to be transmitted to the transmission resource.
11. The station according to claim 10, wherein when the traffic frame to be transmitted includes a data frame, the contention unit includes:
a second receiving unit, configured to receive a packet length threshold of a packet transmission sent by the access point;
the judging unit is used for judging whether the length of the data frame is smaller than a packet length threshold value of the packet transmission;
the execution unit is used for carrying out competition on a resource position corresponding to the data frame when the judging unit judges that the length of the data frame is smaller than the packet length threshold value of the packet transmission; otherwise, the station quits the competition.
12. The station according to claim 10 or 11,
the competition unit is used for carrying out back-off according to time on a resource position corresponding to the service frame to be transmitted according to a CSMA competition mechanism;
the first sending unit is used for sending the service frame to be transmitted to the access point after confirming that the service frame to be transmitted successfully competes for transmission resources;
or;
the competition unit is used for carrying out backoff on a time-frequency resource block at a resource position corresponding to the service frame to be transmitted according to an ODCA competition mechanism;
the first sending unit is configured to send the service frame to be transmitted to the access point after confirming that the service frame to be transmitted successfully competes for a transmission resource.
13. The station of claim 10,
the determining unit is configured to obtain a basic service set identity included in the indication information, and determine whether the access point and the station are in the same basic service set according to the basic service set identity; if yes, determining resource positions corresponding to the service frames to be transmitted according to the resource positions distributed to the service frames of different types in the indication information; and if not, the station quits the competition.
14. The station of claim 10, further comprising:
and the adding unit is used for respectively adding a frame ending mark and/or length information of signal expansion in the service frame to be transmitted, which is transmitted at the position of the corresponding transmission resource, based on the size of the transmission resource carried in the indication information and allocated to the service frames of different types in advance.
15. A station, comprising: the device comprises a memory used for storing a random competition program and a processor connected with the memory;
the processor is configured to execute the random contention procedure, specifically, to receive indication information sent by an access point, where the indication information at least carries a resource location pre-allocated by the access point for different types of service frames; determining resource positions corresponding to the service frames to be transmitted according to the resource positions allocated to the different types of service frames in the indication information; performing competition on a resource position corresponding to the service frame to be transmitted, and after the service frame to be transmitted successfully competes to a transmission resource, transmitting the service frame to be transmitted to the access point; the resource position is the range of the resource block used in the competition access process, and the resource positions pre-allocated by the access point for the different types of service frames belong to different resource blocks.
16. An access point, comprising:
a second sending unit, configured to send indication information to a station, where the indication information at least carries resource locations that are pre-allocated for different types of service frames, so that the station competes at a resource location corresponding to a service frame to be transmitted; the resource position is the range of the resource block used in the competitive access process, and the resource positions pre-allocated by the access point for the service frames of different types belong to different resource blocks;
and a third receiving unit, configured to receive, at a corresponding transmission resource location, the service frame to be transmitted sent by the station after the station successfully competes for the transmission resource for the service frame to be transmitted.
17. The access point of claim 16, further comprising: and the allocation unit is used for allocating different resource positions for the different types of service frames according to the service requests of the different types of service frames.
18. The access point of claim 16, wherein the second sending unit is further configured to: and sending a packet length threshold value of packet transmission to the station.
19. The access point of claim 16, further comprising:
an estimating unit, configured to estimate, according to history information, sizes of resources required for transmission of different types of service frames, where, correspondingly, the indication information sent to the station by the second sending unit further includes: the size of transmission resources allocated in advance for different types of traffic frames.
20. An access point, comprising: the device comprises a memory used for storing a random competition program and a processor connected with the memory;
the processor is configured to execute the random contention procedure, and specifically, to send indication information to a station, where the indication information at least carries resource locations that are pre-allocated to different types of service frames, so that the station performs contention on a resource location corresponding to a service frame to be transmitted; after the station successfully competes for the service frame to be transmitted to the transmission resource, receiving the service frame to be transmitted sent by the station at the corresponding transmission resource position; the resource position is the range of the resource block used in the competition access process, and the resource positions pre-allocated by the access point for the different types of service frames belong to different resource blocks.
21. A random contention system, comprising:
a station according to any of claims 10 to 15, and an access point according to any of claims 16 to 20.
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| CN201510641393.9A CN106559911B (en) | 2015-09-30 | 2015-09-30 | Random competition method, station, access point and system |
| PCT/CN2016/090870 WO2017054562A1 (en) | 2015-09-30 | 2016-07-21 | Random competition method, station, access point and system |
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| JP2023546511A (en) * | 2020-10-28 | 2023-11-02 | 北京小米移動軟件有限公司 | Communication method and communication device |
| CN113692050B (en) * | 2021-07-21 | 2024-03-29 | 深圳市联洲国际技术有限公司 | Resource unit allocation method, device, equipment and medium |
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| CN103036640B (en) * | 2011-09-30 | 2017-11-14 | 中兴通讯股份有限公司 | A kind for the treatment of method and apparatus of data resource mapping position |
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| CN101442381A (en) * | 2007-11-21 | 2009-05-27 | 大唐移动通信设备有限公司 | Method for transmitting and receiving business, relevant apparatus and system |
| CN102065545A (en) * | 2009-11-12 | 2011-05-18 | 大唐移动通信设备有限公司 | Methods for notifying and determining locations of resources and system and equipment |
| WO2012122849A1 (en) * | 2011-03-16 | 2012-09-20 | 电信科学技术研究院 | Method and device for allocating uplink resource |
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