CN111935828A - Communication network data transmission resource allocation method and system - Google Patents

Communication network data transmission resource allocation method and system Download PDF

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Publication number
CN111935828A
CN111935828A CN202010614359.3A CN202010614359A CN111935828A CN 111935828 A CN111935828 A CN 111935828A CN 202010614359 A CN202010614359 A CN 202010614359A CN 111935828 A CN111935828 A CN 111935828A
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data transmission
data
sequence analysis
time sequence
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不公告发明人
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Wang Liuyu
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

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Abstract

The invention discloses a method and a system for allocating communication network data transmission resources, which are characterized in that the number of data transmission resources of a Static time sequence Analysis station for currently allocated resources is obtained according to the data volume to be transmitted of the Static time sequence Analysis station, the total number of channel resources and the data volume to be transmitted of a Static time sequence Analysis networking, and the data transmission resources are allocated to the Static time sequence Analysis station according to the data volume to be transmitted, so that the data transmission resources obtained by each Static time sequence Analysis station (STA, which is regarded as a client of a user in the embodiment of the invention) are balanced, that is, the data transmission resources are allocated to the Static time sequence Analysis station according to needs, thereby improving the data transmission rate and stability of the system and improving the overall data transmission capability of the system.

Description

Communication network data transmission resource allocation method and system
Technical Field
The invention relates to the technical field of computers, in particular to a communication network data transmission resource allocation method and system.
Background
With the rapid development of wireless communication technology, the research on wireless communication standardization work is more and more intensive. The wireless network provides multimedia data transmission services such as voice, image, audio, video and the like. The wireless communication technology is widely applied to the field of online education, and is also widely applied to the fields of medical treatment, security protection, monitoring, military, internet, urban traffic, municipal management and the like.
In the field of online education, a large amount of data is required to be transmitted, the data comprises video, voice, images, characters and the like, particularly video and images, the data is large, and once the online education platform is large enough, users of the online education platform are enough, the data to be transmitted is huge. Even if the online education platform is developed based on a cloud platform and a blockchain technology, data transmission resources of the online education platform are limited (the data transmission resources are also limited when a blockchain is not developed), once the data volume is too large, if the data transmission resources are not well electroplated and the data transmission resources are not reasonably distributed, the data transmission effect of some users is necessarily poor, the users cannot perform online teaching through the platform, the online education platform is inevitably lost, and if the users are continuously lost, serious losses are caused to enterprises.
For the network transmission technology, under the condition that the network transmission resources (bandwidth) are limited, reasonable planning is required and resources are reasonably allocated to each site, so that the data of the network system can be efficiently transmitted. In the prior art, resources are allocated to each station in the network according to a sequence. In this way, in the case of insufficient network resources, it is clear that the rank-behind stations are unfair, which results in poor data transmission effectiveness of the whole network.
Disclosure of Invention
The present invention provides a method and a system for allocating data transmission resources in a communication network, so as to solve the above problems in the prior art.
In a first aspect, an embodiment of the present invention provides a method for allocating data transmission resources of a communication network, where the method includes:
acquiring the number of data transmission time slots available for the current network and the data quantity to be transmitted by each static time sequence analysis site in the static time sequence analysis networking; the number of data transmission time slots represents the number of times of information interaction in one data transmission process:
obtaining the current network data capacity, wherein the current network data capacity is the product of the number of available data transmission time slots of the current network, the current network transmission rate and the time for transmitting a data frame;
acquiring the data transmission resource quantity of the static time sequence analysis site of the current allocated resources according to the data quantity to be transmitted, the total channel resource quantity and the data quantity to be transmitted of the static time sequence analysis site of the current allocated resources, allocating data transmission resources to the static time sequence analysis site according to the data quantity to be transmitted, and sending resource allocation information to the static time sequence analysis site; the resource allocation information includes index information of the allocated data transmission channel; the data transmission resource comprises a data transmission channel; the data volume required to be transmitted by the static time sequence analysis networking is the sum of the data volumes required to be transmitted by all static time sequence analysis sites included in the static time sequence analysis networking;
if the data capacity of the current network is larger than or equal to the number of the available data transmission time slots of the current network, analyzing the data transmission quantity required by networking according to the current network transmission rate and the static time sequence to obtain the number of the actual data transmission time slots; the wireless access point sends and sends trigger resource allocation information to the static time sequence analysis site, wherein the trigger resource allocation information comprises index information of the allocated data transmission channel and the actual data transmission time slot number; the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the wireless local area network communication standard IEEE802.11ax standard, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the actual data transmission time slot number;
if the data capacity of the current network is smaller than the number of available data transmission time slots of the current network, the wireless access point sends and sends triggering resource allocation information to the static time sequence analysis site, wherein the sending triggering resource allocation information comprises index information of the allocated data transmission channels and the number of available data transmission time slots of the current network; and the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the standard of wireless local area network communication standard IEEE802.11ax, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the number of data transmission time slots available for the current network.
Optionally, the obtaining the number of data transmission timeslots available for the current network includes:
obtaining single data transmission duration which is equal to the sum of the length of a single video data transmission time slot, the length of the transmission time slot of a feedback response confirmation character frame sent by a wireless access point and the inter-frame interval of 2 data frame transmissions;
obtaining the maximum available time length of the current time period; the maximum available time length of the current time period is equal to the maximum time length of the current beacon period minus the time length of a contention phase in the beacon period, the time length of a data feedback phase in the beacon period, and the time length of a data retransmission phase in the beacon period, and is specifically shown in a calculation manner of formula (1):
p＝(1/f)-x-y-z,z＝RSlotsd(n)×(t1+t2+2t3) (1)；
wherein, p represents the maximum available time length of the current time period; f represents a video frame rate; x represents the length of time of the contention phase in the beacon period; y represents the time length of the data feedback phase in the beacon period; z represents the time length of the data retransmission phase in the beacon period; rslotsd (n) represents the number of available data transmission slots for the current time period; (t)1+t2+2t3) The time length of a data retransmission stage in a beacon period is equal to the product of the available data transmission time slot number of the current time period and the time data transmission time length; t is t1Indicating a single video data transmission slot length; t is t2The length of a transmission time slot of a feedback response confirmation character frame sent by the wireless access point is represented; t is t3An inter-frame space representing the transmission of a data frame; n represents the number of the current beacon period;
obtaining the number of data transmission time slots available for the current network according to the maximum available time length of the current time period, the length of a single video data transmission time slot, the length of the transmission time slot of a feedback response acknowledgement character frame sent by a wireless access point and the inter-frame interval of 2 data frame transmissions, and specifically calculating according to the mode of formula (2):
TSlote(n)＝(p-t1-t2)/(t1+t2+2t3) (2)；
where tsgate (n) represents the number of data transmission slots currently available to the network.
Optionally, the analyzing, according to the current network transmission rate and the static timing sequence, the amount of data to be transmitted for networking to obtain the actual number of data transmission slots includes:
obtaining the quotient of the transmission data volume required by the static time sequence analysis networking and the current network transmission rate as the actual data transmission time slot number, and specifically obtaining the quotient according to the calculation mode of a formula (3):
TSlot(n)'＝TXOPALL/S (3)
wherein tslot (n)' indicates the number of actual data transmission slots; TXOPALL represents the amount of transmission data required for static timing analysis networking; s denotes the current network transmission rate.
Optionally, the method further includes: if the calculated actual data transmission time slot number tslot (n)' is a non-integer, the non-integer actual data transmission time slot number is rounded down.
Optionally, the obtaining, according to the data amount required to be transmitted by the static timing analysis station of the currently allocated resource, the total number of channel resources, and the data amount required to be transmitted by the static timing analysis networking, the number of data transmission resources of the static timing analysis station of the currently allocated resource includes:
obtaining the data volume weight of the static time sequence analysis station according to the data volume needing to be transmitted and the data volume needing to be transmitted by the static time sequence analysis networking;
and acquiring the data transmission resource quantity of the static time sequence analysis station according to the data quantity weight of the static time sequence analysis station and the total channel resource quantity.
Optionally, the data size weight of the static time sequence analysis station is obtained according to the data size to be transmitted and the data size to be transmitted by the static time sequence analysis networking, and is specifically calculated according to the following formula (4):
Figure BDA0002561485430000031
wherein j is more than 0 and less than or equal to k, k is the number of static time sequence analysis sites included in the static time sequence analysis network, and k is a positive integer greater than or equal to 1; j. a is a positive integer greater than or equal to 1, a is used for representing the number of a static time sequence analysis station, and j represents the number of the static time sequence analysis station which currently allocates resources; TXOPjRepresenting the data quantity needing to be transmitted of the static time sequence analysis station of the current distributed resources; TXOPaRepresenting the data quantity needing to be transmitted of the a-th static time sequence analysis station; qjA data volume weight representing the static timing analysis site currently allocated resources; TXOPAll represents the required transmission data volume of the static timing analysis networking;
the data transmission resource quantity of the static time sequence analysis station is obtained according to the data weight of the static time sequence analysis station and the total channel resource quantity, and is specifically obtained by calculation according to the following formula (5):
Cj＝M×Qj (5)
wherein, CjRepresenting the number of data transmission resources of the static timing analysis station of the currently allocated resources, wherein M represents the total number of channel resources; if CjIs a non-integer, for non-integer CjRounding off to obtain the data transmission resource quantity of the static time sequence analysis site of the current distributed resources, wherein the data transmission resource quantity of the static time sequence analysis site of the current distributed resources is less than or equal to the total channel resource quantity.
In a second aspect, an embodiment of the present invention provides a system for allocating data transmission resources in a communication network, where the system includes:
the acquisition module is used for acquiring the number of data transmission time slots available for the current network and acquiring the data quantity to be transmitted by each static time sequence analysis station in the static time sequence analysis networking; the number of data transmission time slots represents the number of times of information interaction in one data transmission process: obtaining the current network data capacity, wherein the current network data capacity is the product of the number of available data transmission time slots of the current network, the current network transmission rate and the time for transmitting a data frame;
the resource allocation module is used for acquiring the data transmission resource quantity of the static time sequence analysis site of the current allocated resources according to the data quantity required to be transmitted by the static time sequence analysis site of the current allocated resources, the total channel resource quantity and the data quantity required to be transmitted by the static time sequence analysis networking, allocating data transmission resources to the static time sequence analysis site according to the data quantity required to be transmitted, and sending resource allocation information to the static time sequence analysis site; the resource allocation information includes index information of the allocated data transmission channel; the data transmission resource comprises a data transmission channel; the data volume required to be transmitted by the static time sequence analysis networking is the sum of the data volumes required to be transmitted by all static time sequence analysis sites included in the static time sequence analysis networking; if the data capacity of the current network is larger than or equal to the number of the available data transmission time slots of the current network, analyzing the data transmission quantity required by networking according to the current network transmission rate and the static time sequence to obtain the number of the actual data transmission time slots; the wireless access point sends and sends trigger resource allocation information to the static time sequence analysis site, wherein the trigger resource allocation information comprises index information of the allocated data transmission channel and the actual data transmission time slot number; the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the wireless local area network communication standard IEEE802.11ax standard, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the actual data transmission time slot number; if the data capacity of the current network is smaller than the number of available data transmission time slots of the current network, the wireless access point sends and sends triggering resource allocation information to the static time sequence analysis site, wherein the sending triggering resource allocation information comprises index information of the allocated data transmission channels and the number of available data transmission time slots of the current network; and the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the wireless local area network communication standard IEEE802.11ax, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the number of the data transmission time slots available for the current network.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a method and a system for allocating communication network data transmission resources, wherein the method comprises the following steps: acquiring the number of data transmission time slots available for the current network and the data quantity to be transmitted by each static time sequence analysis site in the static time sequence analysis networking; the number of data transmission time slots represents the number of times of information interaction in one data transmission process: obtaining the current network data capacity, wherein the current network data capacity is the product of the number of available data transmission time slots of the current network, the current network transmission rate and the time for transmitting a data frame; acquiring the data transmission resource quantity of the static time sequence analysis site of the current allocated resources according to the data quantity to be transmitted, the total channel resource quantity and the data quantity to be transmitted of the static time sequence analysis site of the current allocated resources, allocating data transmission resources to the static time sequence analysis site according to the data quantity to be transmitted, and sending resource allocation information to the static time sequence analysis site; the resource allocation information includes index information of the allocated data transmission channel; the data transmission resource comprises a data transmission channel; the data volume required to be transmitted by the static time sequence analysis networking is the sum of the data volumes required to be transmitted by all static time sequence analysis sites included in the static time sequence analysis networking; if the data capacity of the current network is larger than or equal to the number of the available data transmission time slots of the current network, analyzing the data transmission quantity required by networking according to the current network transmission rate and the static time sequence to obtain the number of the actual data transmission time slots; the wireless access point sends and sends trigger resource allocation information to the static time sequence analysis site, wherein the trigger resource allocation information comprises index information of the allocated data transmission channel and the actual data transmission time slot number; the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the wireless local area network communication standard IEEE802.11ax standard, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the actual data transmission time slot number; if the data capacity of the current network is smaller than the number of available data transmission time slots of the current network, the wireless access point sends and sends triggering resource allocation information to the static time sequence analysis site, wherein the sending triggering resource allocation information comprises index information of the allocated data transmission channels and the number of available data transmission time slots of the current network; and the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the standard of wireless local area network communication standard IEEE802.11ax, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the number of data transmission time slots available for the current network.
By adopting the scheme, the data transmission resource quantity of the Static time sequence Analysis station of the current allocated resources is obtained according to the data quantity required to be transmitted by the Static time sequence Analysis station, the total channel resource quantity and the data quantity required to be transmitted by the Static time sequence Analysis network, and the data transmission resources are allocated to the Static time sequence Analysis station according to the data quantity required to be transmitted, so that the data transmission resources obtained by each Static time sequence Analysis station (STA, which is regarded as a client of a user in the embodiment of the invention) are relatively balanced, that is, the data transmission resources are allocated to the Static time sequence Analysis station according to the requirement, the data transmission rate and the stability of the system are improved, and the overall data transmission capacity of the system is improved.
Drawings
Fig. 1 is a flowchart of a method for allocating data transmission resources in a communication network according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a beacon period according to an embodiment of the present invention.
Fig. 3 is a structure diagram of a TriggerDataRequest frame according to an embodiment of the present invention.
Fig. 4 is a structure diagram of a DataResponse frame according to an embodiment of the present invention.
FIG. 5 is a diagram illustrating an RU assignment in a User Info field according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a typical data transmission flow of an AP and an STA based on IEEE802.11ax according to an embodiment of the present invention.
Fig. 7 is a diagram of a retransmission slot number adjustment window according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of a TriggerResourceAllocation frame according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a system for allocating data transmission resources of a communication network according to an embodiment of the present invention.
Fig. 10 is a schematic block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings. In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
With the rapid development of wireless communication technology, the research on wireless communication standardization work is more and more intensive. Wireless networks provide multimedia services for voice, image, audio, video, etc. The wireless communication technology is widely applied to the fields of online education, medical treatment, security protection, monitoring, military, internet, urban traffic, municipal management and the like.
Among Wireless communication technologies, Wireless Local Area Network (WLAN) standard protocol is the most popular network transport protocol at present. The latest generation of WLAN standard protocol, IEEE802.11ax is also called High-Efficiency Wireless standard (HEW), and is mainly directed to applications in High-density deployment environments. Compared with the prior protocol, the method introduces an Orthogonal Frequency Division multiplexing Multiple Access (OFDMA) technology which is applied to a plurality of wireless technologies into the WLAN standard, thereby improving the utilization rate of the existing Frequency band resources, and improving the efficiency and the user experience of the system. Meanwhile, the maximum transmission rate is greatly improved compared with the prior protocols, and the maximum theoretical data rate reaches 600.4Mbps (80MHz 1SS) and 9607.8Mbps (160MHz 8 SS).
However, current networks include multiple stations that pre-empt resources among each other. How to allocate resources to stations in a balanced manner and ensure the overall transmission efficiency in the network is a problem to be considered in data transmission process of the wireless network.
In the field of online education, a large amount of data is required to be transmitted, the data comprises video, voice, images, characters and the like, particularly video and images, the data is large, and once the online education platform is large enough, users of the online education platform are enough, the data to be transmitted is huge. Even if the online education platform is developed based on a cloud platform and a blockchain technology, data transmission resources of the online education platform are limited (the data transmission resources are also limited when a blockchain is not developed), once the data volume is too large, if the transmission resources are not reasonably distributed, the data transmission effect of some users is poor, the users cannot perform online education through the platform, the online education platform is bound to lose the users, and if the users are continuously lost, serious losses are caused to enterprises.
In a stock transaction system, an online payment system, a bank system, a subway system, a railway system, a public transportation system, a security system, a medical system and the like, a plurality of user groups exist, most of information of the users exists in the forms of videos, voices, images and characters, the data volume is huge, and the data transmission efficiency is very important for the purposes of serving the users, ensuring the safety of the users and the society and the like. However, in the case of limited data transmission resources, if the transmission resources are not reasonably allocated, some users will not be able to effectively and quickly transmit their data, and the system will not be able to quickly retrieve the data of some users, which will affect the service effect of the users.
Therefore, the embodiment of the invention provides a method and a system for allocating data transmission resources of a communication network, which can reasonably allocate the data transmission resources to each site (user) and ensure that the allocation of the data transmission resources of the users in the system is relatively balanced, thereby improving the data transmission efficiency of the whole system and improving the experience effect of the users. The method can be applied to data transmission in the fields of medical treatment, education, security protection, monitoring, military, Internet, urban traffic, municipal management and the like, and can be used for transmitting multimedia data such as voice, images, audio, video and the like.
Examples
An embodiment of the present invention provides a method for allocating communication network data transmission resources, as shown in fig. 1, the method includes:
s101: the method comprises the steps of obtaining the number of data transmission time slots available for the current network and obtaining the data quantity required to be transmitted by each static time sequence analysis station in the static time sequence analysis networking.
The number of the data transmission time slots represents the number of times of information interaction in one data transmission process.
S102: and acquiring the current network data capacity, wherein the current network data capacity is the product of the number of available data transmission time slots of the current network, the current network transmission rate and the time for transmitting a data frame.
S103: the method comprises the steps of obtaining the data transmission resource quantity of a static time sequence analysis site of current distributed resources according to the data quantity needing to be transmitted by the static time sequence analysis site of the current distributed resources, the total channel resource quantity and the data quantity needing to be transmitted by a static time sequence analysis networking, distributing data transmission resources to the static time sequence analysis site according to the data quantity needing to be transmitted, and sending resource distribution information to the static time sequence analysis site.
Wherein the resource allocation information includes index information of the allocated data transmission channel; the data transmission resource comprises a data transmission channel; the data volume required to be transmitted by the static time sequence analysis networking is the sum of the data volumes required to be transmitted by all static time sequence analysis sites included in the static time sequence analysis networking.
S104: if the data capacity of the current network is larger than or equal to the number of the available data transmission time slots of the current network, analyzing the data transmission quantity required by networking according to the current network transmission rate and the static time sequence to obtain the number of the actual data transmission time slots; the wireless access point sends and sends trigger resource allocation information to the static time sequence analysis site, wherein the trigger resource allocation information comprises index information of the allocated data transmission channel and the actual data transmission time slot number; and the static time sequence analysis station determines the frequency range of the static time sequence analysis station according to the mapping relation between the index information of the distributed data transmission channel and the index value in the standard of wireless local area network communication standard IEEE802.11ax, and transmits the video data required to be transmitted by the static time sequence analysis station according to the frequency range and the actual data transmission time slot number.
S105: if the data capacity of the current network is smaller than the number of available data transmission time slots of the current network, the wireless access point sends and sends triggering resource allocation information to the static time sequence analysis site, wherein the sending triggering resource allocation information comprises index information of the allocated data transmission channels and the number of available data transmission time slots of the current network; and the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the standard of wireless local area network communication standard IEEE802.11ax, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the number of data transmission time slots available for the current network.
By adopting the scheme, the data transmission resource quantity of the Static time sequence Analysis station of the current allocated resources is obtained according to the data quantity required to be transmitted by the Static time sequence Analysis station, the total channel resource quantity and the data quantity required to be transmitted by the Static time sequence Analysis network, and the data transmission resources are allocated to the Static time sequence Analysis station according to the data quantity required to be transmitted, so that the data transmission resources obtained by each Static time sequence Analysis station (STA, which is regarded as a client of a user in the embodiment of the invention) are relatively balanced, that is, the data transmission resources are allocated to the Static time sequence Analysis station according to the requirement, the data transmission rate and the stability of the system are improved, and the overall data transmission capacity of the system is improved.
Optionally, the obtaining the number of data transmission timeslots available for the current network includes:
and acquiring single data transmission duration which is equal to the sum of the single video data transmission time slot length plus the transmission time slot length of a feedback response confirmation character frame sent by the wireless access point and the interframe space of 2 data frame transmissions.
And obtaining the maximum available time length of the current time period. The maximum available time length of the current time period is equal to the maximum time length of the current beacon period minus the time length of a contention phase in the beacon period, the time length of a data feedback phase in the beacon period, and the time length of a data retransmission phase in the beacon period, and is specifically shown in a calculation manner of formula (1):
p＝(1/f)-x-y-z,z＝RSlotsd(n)×(t1+t2+2t3) (1)；
wherein, p represents the maximum available time length of the current time period; f denotes a video frameA frame rate; x represents the length of time of the contention phase in the beacon period; y represents the time length of the data feedback phase in the beacon period; z represents the time length of the data retransmission phase in the beacon period; rslotsd (n) represents the number of available data transmission slots for the current time period; (t)1+t2+2t3) The time length of a data retransmission stage in a beacon period is equal to the product of the available data transmission time slot number of the current time period and the time data transmission time length; t is t1Indicating a single video data transmission slot length; t is t2The length of a transmission time slot of a feedback response confirmation character frame sent by the wireless access point is represented; t is t3An inter-frame space representing the transmission of a data frame; n denotes the number of the current beacon period.
Obtaining the number of data transmission time slots available for the current network according to the maximum available time length of the current time period, the length of a single video data transmission time slot, the length of the transmission time slot of a feedback response acknowledgement character frame sent by a wireless access point and the inter-frame interval of 2 data frame transmissions, and specifically calculating according to the mode of formula (2):
TSlote(n)＝(p-t1-t2)/(t1+t2+2t3) (2)；
where tsgate (n) represents the number of data transmission slots currently available to the network.
Optionally, the analyzing, according to the current network transmission rate and the static timing sequence, the amount of data to be transmitted for networking to obtain the actual number of data transmission slots includes:
obtaining the quotient of the transmission data volume required by the static time sequence analysis networking and the current network transmission rate as the actual data transmission time slot number, and specifically obtaining the quotient according to the calculation mode of a formula (3):
TSlot(n)'＝TXOPALL/S (3)
wherein tslot (n)' indicates the number of actual data transmission slots; TXOPALL represents the amount of transmission data required for static timing analysis networking; s represents the current network transmission rate. The unit of TXOPAll is the sum of the transmission demands of all STAs in the current beacon period and is Mb.
Optionally, the method further includes: if the calculated actual data transmission time slot number tslot (n)' is a non-integer, the non-integer actual data transmission time slot number is rounded down.
The obtaining the data transmission resource quantity of the static time sequence analysis station of the current allocation resource according to the data quantity required to be transmitted by the static time sequence analysis station of the current allocation resource, the total channel resource quantity and the data quantity required to be transmitted by the static time sequence analysis networking comprises the following steps:
obtaining the data volume weight of the static time sequence analysis station according to the data volume needing to be transmitted and the data volume needing to be transmitted by the static time sequence analysis networking; and acquiring the data transmission resource quantity of the static time sequence analysis station according to the data quantity weight of the static time sequence analysis station and the total channel resource quantity.
Obtaining the data volume weight of the static time sequence analysis station according to the data volume required to be transmitted and the data volume required to be transmitted by the static time sequence analysis networking, and specifically obtaining the data volume weight by calculating according to the following formula (4):
Figure BDA0002561485430000111
wherein j is more than 0 and less than or equal to k, k is the number of static time sequence analysis sites included in the static time sequence analysis network, and k is a positive integer greater than or equal to 1; j. a is a positive integer greater than or equal to 1, a is used for representing the number of a static time sequence analysis station, and j represents the number of the static time sequence analysis station which currently allocates resources; TXOPjRepresenting the data quantity needing to be transmitted of the static time sequence analysis station of the current distributed resources; TXOPaRepresenting the data quantity needing to be transmitted of the a-th static time sequence analysis station; qjA data volume weight representing the static timing analysis site currently allocated resources; TXOPAll represents the required transmission data volume of the static timing analysis networking;
the data transmission resource quantity of the static time sequence analysis station is obtained according to the data weight of the static time sequence analysis station and the total channel resource quantity, and is specifically obtained by calculation according to the following formula (5):
Cj＝M×Qj (5)
wherein, CjRepresenting the number of data transmission resources of the static timing analysis station of the currently allocated resources, wherein M represents the total number of channel resources; if CjIs a non-integer, for non-integer CjRounding off to obtain the data transmission resource quantity of the static time sequence analysis site of the current distributed resources, wherein the data transmission resource quantity of the static time sequence analysis site of the current distributed resources is less than or equal to the total channel resource quantity.
If calculated CjNon-integer, then rounded off and guaranteed C for all STA assignmentsjThe sum is not more than M.
By adopting the scheme, different data transmission resource allocation modes are adopted for different data volumes, so that the data transmission resources obtained by each STA station in the system can be ensured to be appropriate, the data transmission capability and efficiency of the system are improved, and the transmission timeliness is also improved.
In order to more clearly illustrate the technology of the present invention, the following description is made:
it should be noted that, before S101, the method further includes: parameters in the system are initialized, and optionally, the parameters in the system are all initialized to 0. Parameters in the system include the network bandwidth range, the current network transmission rate S (unit: Mbps), the number of subcarriers contained in a single RU (typically 26), the total number of RU resources in the channel M, the time length of the contention phase in the beacon period x (unit: seconds), the time length of the DF phase y (unit: seconds), and the time length of a single data transmission time slot t1(unit: second), transmission time slot time length t of control frame2(unit: seconds), time length t of SIFS interval3(unit: second), video frame rate f, and maximum length of beacon period 1/f (unit: second). The simultaneous initialization beacon period includes four phases: contention phase, Data Feedback (DF) phase, enhanced controlled channel access (Enc)A transmitted HFC Controlled Channel Access (EHCCA) phase and a Data Retransmission (DRT) phase are shown in fig. 2. The method includes a contention stage, a DF stage and an EHCCA stage, where the DRT stage is optional if the packet loss rate is 0 and continuously decreases in the last beacon period, and the length may be 0, and when a wireless Access Point (AP) considers that the packet loss rate is very low or the packet loss rate continuously decreases, the DRT stage may be 0. Accordingly, interference of the network environment is reduced. In the embodiment of the invention, after the system is networked, a wireless Access Point (AP) and an STA (station) site establish network connection to complete networking.
Briefly described herein, the contention phase is used for STAs to join or leave the network. The DF stage is mainly used for feeding back the size of the data volume to be transmitted by each STA, the EHCCA stage is used for controlling each STA to transmit video data according to the size of the data volume to be transmitted of each STA, and the DRT stage is used for retransmitting the unsuccessfully transmitted data packets. Where the contention phase is typically short and only exists at the beginning of the beacon period. In the DF stage, control frames are transmitted, so that the data volume is small and the time is short. EHCCA phase the length of EHCCA is variable because video packets are transmitted and the transmission requirements of STAs in different beacon periods are different. The DRT stage is optional, the length of the DRT stage is determined by the size of the packet loss rate and the variation trend of the packet loss rate, and the real-time performance is improved while the reliability is guaranteed. In the following steps, the present application describes the flow of the scheduling mechanism by taking a beacon period as an example.
Assume that the current nth beacon period, where n >2, n is a positive integer. In a competition stage at the beginning of a beacon period, the STA joins the network, and when the competition stage is finished, the number of the current network STAs is known to be k, k is greater than 0, and k is a positive integer.
At the beginning of the DF phase, the AP sends a TriggerDataRequest frame for requesting the size of Transmission Opportunity (TXOP) of each STA, and specifies the RU range of each STA in the DataResponse frame.
It should be noted that IEEE802.11ax proposes a new control frame Trigger, which carries RU resource allocation information and is used for an STA to perform uplink data transmission according to the allocated RU range. The new Trigger datarequest frame is designed based on the existing Trigger frame format of IEEE802.11ax, and the frame format is shown in FIG. 3.
Where User Info field indicates the allocation of RU resources, each RU consisting of 26 subcarriers. Each STA receives a Cache Request field as a Cache Request, and when the value of the bit is 1, each STA needs to count the size of a Cache data amount TXOP after receiving a TriggerDataRequest frame, and sends a DataResponse frame after waiting for the time length of a Short Interframe Space (SIFS). Wherein, a new DataResponse frame is designed based on the existing format of the IEEE802.11 probe response frame, and the frame format is shown in fig. 4:
where TXOP field represents the size of the transmission demand of the STA. Note that, in the OFDMA mode, STAs share the same channel and transmit a DataResponse frame in respective RU ranges.
To explain the allocation of RUs and the exchange flow of data frames in OFDMA mode in more detail, as shown in fig. 5 and 6. Fig. 5 illustrates an example of a wireless network with a bandwidth range of 20MHz for 3 STAs, where the RU allocation resources corresponding to the 3 STAs are 106tone RUs 1, 52tone RUs 3, and 52tone RUs 4, respectively. Each User Info field in the Trigger frame represents different STA, and the STA judges whether the SSID in the User Info field is matched with the SSID of the STA by analysis to obtain the corresponding User Info field. The AP assigns an RU Allocation bit to an RU Allocation subfield in the User Info field in the Trigger frame, for example, the RU Allocation bit of RU1 in fig. 8 has a value of "0110101", where the RU Allocation bit carries a value of an index bit (RU Allocation bits) corresponding to the allocated resource. Different RU Allocation bits correspond to different ranges of subcarriers (Subcxr), the corresponding relation table is defined by IEEE802.11ax standard, and the STA can be acquired by the mode similar to dictionary query.
After each STA receives the Trigger frame, the number of available data transmission time slots of the current EHCCA stage is obtained according to the Slot Counts field, and meanwhile, the frequency range of each STA in the OFMDA mode is determined according to the index value of the RU Allocation subfield in each User Info and the mapping relation between the index value and the frequency range in IEEE802.11 ax. Fig. 6 illustrates a typical data transmission situation between an AP and an STA, taking 3 STAs as an example, on the premise of the RU allocation information in fig. 5. After receiving the Trigger frame issued by the AP, the 3 STAs upload data in a data transmission time slot by using the same channel in different frequency ranges, and the AP returns an ACK/BA frame after the transmission time slot is finished.
Although the transmission requirements of the STAs in the current beacon period are known from the above, in order to improve reliability, a certain amount of data retransmission time needs to be preset in an environment where the network continuously interferes, so as to ensure transmission of important types of video frames and reduction of packet loss rate.
Because the network cannot predict the data transmission condition when the network has not started to transmit data, but can know the transmission condition of each beacon period in the historical stage, according to the change of the historical condition, specifically the change of the packet loss rate, the packet loss rate in the transmission process of the current beacon period can be approximately predicted, because the beacon period interval is very short (1/24s), and the interference of the network environment is continuous (usually much longer than 1/24s), the prediction can be regarded as approximately accurate and reliable. Even if the interference suddenly disappears or increases in the current beacon period, the length of the DRT can be timely adjusted in the next beacon period due to the short beacon period, and the method has strong strain capacity and robustness for the sudden change.
And the AP plans the available retransmission time slot number RSlots (n) of the current beacon period according to the packet loss rate of the current network in the (n-1) th beacon period and the variation trend of the packet loss rate. It should be noted that if n is 1, it is obvious that both the packet loss rate and the variation trend of the packet loss rate are 0; if n is 2, it is obvious that the packet loss rate has a tendency of 0.
It is assumed herein that the initial retransmission slot number is 0. In order to better meet the dual requirements of video transmission on packet loss rate and time delay, a retransmission time slot number adjusting window is designed for dynamically adjusting the size of the retransmission time slot number, so as to further improve the reliability and the real-time performance under the condition of network interference. The retransmission slot number adjustment window is shown in fig. 7.
In fig. 7, rslots (n) indicates the number of retransmission slots in the nth beacon period, wherein the range of rslots (n) is set to 0 ≦ rslot (n) ≦ (((1/f) -x-y) × 0.01-t2-t3)/(t1+t2+2t3). The QoS requirement of the h.264-based IP video service indicated by Cisco indicates that the upper limit of the packet loss rate is 1%, so ((1/f) -x-y) × 0.01 can be understood as the maximum time length of the DRT stage on the premise that the upper limit of the packet loss rate is 1%. (t)1+t2+2t3) The time length of transmitting a data frame + a feedback frame +2 interframe spaces is shown, the process can be regarded as a group data exchange, and all RSlots (n) group data exchange exists in the DRT stage; since the AP needs to send control frames at the beginning of the DRT phase (((1/f) -x-y) × 0.01-t2-t3) It can be understood as the total length of the DRT phase minus the total length of time remaining available for rslots (n) for group data exchange after the AP sends a control frame and a single inter-frame interval at the start.
In order to enable the adjustment of the retransmission time slot number to respond to the change of the network environment more quickly, a secondary operation change area and a primary operation change area are designed, and an RThread is taken as a boundary, wherein the RThread is 1/3 of the average value of the retransmission time slot number of each historical beacon period, the RThread is a non-integer which is usually calculated, and the RThread is between two adjacent integers and aims to distinguish the two change areas.
When the interference occurs or disappears, the packet loss rate is in a trend of increasing or decreasing at a high speed due to insufficient or excessive retransmission time slots when the secondary operation changes, and the purpose of rapidly adapting to the change of the network interference by changing the retransmission time slots is achieved in a manner of changing the secondary operation; the first-stage operation change considers that when the interference continuously occurs, the size of the retransmission time slot number and the size of the packet loss rate form a state similar to dynamic balance, and the influence of a small increase or decrease of the retransmission time slot number on the real-time performance is achieved in a linear change mode. Therefore, when the packet loss rate and the interference are continuously stable, the delay jitter caused by large secondary operation change adjustment amplitude is compensated.
The network interference is considered to have the characteristics of randomness, burstiness and persistence. When interference occurs, the packet loss rate is in an increasing trend due to insufficient retransmission time slot number, and at this time, if the retransmission time slot number RSlots (n-1) < RThread in the previous beacon period, the retransmission time slot number in the current beacon period changes in a two-stage operation manner, that is:
RSlot(n)＝2×RSlot(n-1)
if the number of retransmission slots RSlots (n-1) > RThread of the previous beacon period, the number of retransmission slots of the current beacon period varies in a linear manner during the interference duration, that is:
RSlot(n)＝RSlot(n-1)+1
on the contrary, when the packet loss rate is in a downward trend, if the number of the retransmission time slots RSlot (s-n1) < RThre in the previous beacon period, the number of the retransmission time slots in the current beacon period changes in a two-stage operation manner, that is:
RSlot(n)＝RSlot(n-1)/2)
if the calculated RSlots (n) is non-integer, then RSlots (n) is rounded up.
If the number of retransmission slots RSlots (n-1) > RThread of the previous beacon period, the number of retransmission slots of the current beacon period varies in a linear manner, i.e.:
RSlot(n)＝RSlot(n-1)-1
through the design of the retransmission time slot number adjusting window, the change of network environment interference can be quickly responded in a short time through a secondary operation change area, the increase of packet loss rate caused by continuously enhanced interference is avoided, and the increase of time delay caused by excessive retransmission time slot number caused by continuously weakened interference is also avoided; the linear change area can guarantee certain real-time performance while giving consideration to packet loss rate when interference continuously occurs, delay rise caused by excessive retransmission time slot number is avoided, and the design has double effects of giving consideration to reliability and guaranteeing real-time performance.
According to the structure (contention phase, Data Feedback (DF) phase, enhanced Controlled Channel Access (EHCCA) phase, and Data Retransmission (DRT) phase) of the beacon period, when the maximum length 1/f, the contention phase length x, the DF phase length y, and the DRT phase length (determined by rslots (n)) of the beacon period are known, the maximum length p available for the EHCCA phase can be obtained, and the calculation formula is:
p＝(1/f)-x-y-RSlots(n)×(t1+t2+2t3)
note that t is1+t2+2t3Indicating the sum of the single video data transmission slot length plus the AP sent feedback acknowledgement ACK frame transmission slot length plus the inter-frame spacing of the 2 data frame transmissions.
It can be concluded that the maximum length p available for the EHCCA stage is dynamically variable and that this value is derived from the remaining available transmission slots determined by the preceding stages and subtracted.
Further, under the limitation of the maximum length p, the number of data transmission time slots tslots (n) available in the EHCCA stage is calculated, and the calculation formula is:
TSlot(n)＝(p-t1-t2)/(t1+t2+2t3)
if the calculated TSlots (n) is non-integer, then the rounding is done down.
S106, the AP calculates the sum of the data volume to be transmitted in the current beacon period and the weight value Q of each STA according to the TXOP information carried by each STA in the DataResponse frame. Take STAj as an example, Q thereofjThe calculation formula of (a) is as follows:
Figure BDA0002561485430000161
wherein j is more than 0 and less than or equal to k, and k is the number of STAs in the current network.
In step S103, let TXOPAll be the sum of the demands to be transmitted by STAs in the current beacon period, and the unit is Mb.
If the number of the available data transmission time slots in the current network EHCCA stage meets the sum TXOPAL of the demands to be transmitted of all STAs, namely t1TSlo (t) n ≧ STXOPA, strategy 1 is adopted, namely AP sends TriggerResourceAllocation frame: the TriggerResourceAllocation frame carries RU resource allocation information and the number of EHCCA stage data transmission slots tslots (n)'.
RU resource allocation strategy by Q of each STAjDetermining the value, allocating unequal number of RU resources, and defining the number of RU resources allocated by STAj as CjThe calculation formula is as follows:
Cj＝M×Qj
if calculated CjNon-integer, then rounded off and guaranteed C for all STA assignmentsjThe sum is not more than M.
The actual data transmission time slot number tslots (n)' is calculated as:
tslot (n)' (TXOPALL/S (formula 9)
If the calculated TSlot (n) 'is not an integer, then rounding is performed downwards to ensure that TSlots (n)' is not greater than TSlots (n), and after the video data is transmitted, the DRT stage or the next beacon period can be entered in advance to reduce the waiting time delay of data transmission.
Thus, the DRT is started to determine the length, but the starting time of the DRT is changed according to the length of the EHCCA, and the DRT enters in advance, so that the waiting time delay can be reduced.
If the number of data transmission slots available in the current network EHCCA stage cannot meet the sum TXOPALL of the demands of the STAs to be transmitted, i.e. t1Tslot (n) S < TXOPALL, then strategy 2 is adopted — AP sends TriggerResourceAllocation frame: the TriggerResourceAllocation frame carries RU resource allocation information and the number of EHCCA stage data transmission slots tslots (n).
Similarly, the number C of RU resources allocated to STAjjBy weight value QjDetermining that the calculation formula is Cj＝M×Qj. Therefore, a new TriggerResourceAllocation frame format designed based on the existing Trigger frame format is shown in fig. 8, where Slot Counts field represents the number of data transmission slots of the current EHCCA stage. The User Info field indicates RU resource allocation information of each STA.
S107, after each STA receives the TriggerResourceAllocation frame, the number of the available data transmission time slots of the current EHCCA stage is obtained according to the Slot Counts field, meanwhile, the frequency range of each STA in the OFMDA mode is determined according to the index value of the RU Allocation subfield in each User Info and the mapping relation between the index value and the frequency range in IEEE802.11ax, video data in the cache is transmitted in sequence, and the AP returns an ACK frame after the data transmission time Slot is finished.
The embodiment of the present application further provides an execution main body for executing the above steps, and the execution main body may be the communication network data transmission resource allocation system 200 in fig. 9. Referring to fig. 9, the system includes:
an obtaining module 210, configured to obtain the number of data transmission time slots available in a current network, and obtain the data amount that needs to be transmitted by each static timing analysis station in the static timing analysis networking; the number of data transmission time slots represents the number of times of information interaction in one data transmission process: obtaining the current network data capacity, wherein the current network data capacity is the product of the number of available data transmission time slots of the current network, the current network transmission rate and the time for transmitting a data frame;
the resource allocation module 220 is configured to obtain the number of data transmission resources of the static timing analysis station that currently allocates resources according to the amount of data that needs to be transmitted by the static timing analysis station that currently allocates resources, the total number of channel resources, and the amount of data that needs to be transmitted by the static timing analysis networking, allocate data transmission resources to the static timing analysis station according to the amount of data that needs to be transmitted, and send resource allocation information to the static timing analysis station; the resource allocation information includes index information of the allocated data transmission channel; the data transmission resource comprises a data transmission channel; the data volume required to be transmitted by the static time sequence analysis networking is the sum of the data volumes required to be transmitted by all static time sequence analysis sites included in the static time sequence analysis networking; if the data capacity of the current network is larger than or equal to the number of the available data transmission time slots of the current network, analyzing the data transmission quantity required by networking according to the current network transmission rate and the static time sequence to obtain the number of the actual data transmission time slots; the wireless access point sends and sends trigger resource allocation information to the static time sequence analysis site, wherein the trigger resource allocation information comprises index information of the allocated data transmission channel and the actual data transmission time slot number; the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the wireless local area network communication standard IEEE802.11ax standard, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the actual data transmission time slot number; if the data capacity of the current network is smaller than the number of available data transmission time slots of the current network, the wireless access point sends and sends triggering resource allocation information to the static time sequence analysis site, wherein the sending triggering resource allocation information comprises index information of the allocated data transmission channels and the number of available data transmission time slots of the current network; and the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the wireless local area network communication standard IEEE802.11ax, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the number of the data transmission time slots available for the current network.
Optionally, the system further includes:
an initialization module, which is used for system initialization, the wireless Access Point (AP) determines initial parameters during initialization, including the network bandwidth range, the current network transmission rate S (unit: Mbps), the number of subcarriers (usually 26) contained in a single channel RU (minimum unit of channel data transmission resource, described in ieee802.11ax document), the total number M of RU resources in the channel, the time length x (unit: second) of the contention stage in the beacon period, the time length y (unit: second) of the DF stage, and the time length t of a single data transmission time slot1(unit: second), transmission time slot time length t of control frame2(unit: second), waiting for a time length t of a Short Interframe Space (SIFS) interval3(unit: second), video frame rate f, and maximum length of beacon period 1/f (unit: second).Beacon period as shown in fig. 3, the length of the beacon period is variable in consideration of the real-time requirement, because the shorter beacon period facilitates the timely transmission of video data.
In addition, the communication network data transmission resource allocation system 200 is configured to perform any of the steps of the communication network data transmission resource allocation method described above. With regard to the system in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
An electronic device is further provided in the embodiments of the present application, as shown in fig. 10, the electronic device at least includes a data interface 501 and a processor 502. The processor 502 performs data interaction with the memory system 600 through the data interface 501, and the specific processor 502 performs data interaction with a memory block in the memory system 600 through the data interface 501.
Optionally, as shown in fig. 10, the electronic device further includes a storage system 600. Similarly, the processor 502 interacts with the memory blocks in the memory system 600 through the data interface 501.
Optionally, the electronic device further comprises a memory 504, a computer program stored on the memory 504 and executable on the processor 502, the processor 502 implementing the steps of any of the communication network data transmission resource allocation methods described hereinbefore when executing the program.
The storage system 600 may be the memory 504, or may be different from the memory 504, or the storage system 600 may be a partial storage partition of the memory 504, or the memory 504 may be a certain storage block in the storage system 600.
Where in fig. 10 a bus architecture (represented by bus 500) is shown, bus 500 may include any number of interconnected buses and bridges, and bus 500 links together various circuits including one or more processors, represented by processor 502, and memory, represented by memory 504. The bus 500 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The processor 502 is responsible for managing the bus 500 and general processing, and the memory 504 may be used for storing data used by the processor 502 in performing operations.
Embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of any of the foregoing methods for allocating data transmission resources of a communication network.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. In addition, this application is not directed to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the present application as described herein, and any descriptions of specific languages are provided above to disclose the best modes of the present application.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the present application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in an apparatus according to embodiments of the present application. The present application may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present application may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Claims (10)

1. A method for allocating data transmission resources in a communication network, the method comprising:
acquiring the number of data transmission time slots available for the current network and the data quantity to be transmitted by each static time sequence analysis site in the static time sequence analysis networking; the number of data transmission time slots represents the number of times of information interaction in one data transmission process:
obtaining the current network data capacity, wherein the current network data capacity is the product of the number of available data transmission time slots of the current network, the current network transmission rate and the time for transmitting a data frame;
acquiring the data transmission resource quantity of the static time sequence analysis site of the current allocated resources according to the data quantity to be transmitted, the total channel resource quantity and the data quantity to be transmitted of the static time sequence analysis site of the current allocated resources, allocating data transmission resources to the static time sequence analysis site according to the data quantity to be transmitted, and sending resource allocation information to the static time sequence analysis site; the resource allocation information includes index information of the allocated data transmission channel; the data transmission resource comprises a data transmission channel; the data volume required to be transmitted by the static time sequence analysis networking is the sum of the data volumes required to be transmitted by all static time sequence analysis sites included in the static time sequence analysis networking;
if the data capacity of the current network is larger than or equal to the number of the available data transmission time slots of the current network, analyzing the data transmission quantity required by networking according to the current network transmission rate and the static time sequence to obtain the number of the actual data transmission time slots; a wireless access point sends and sends trigger resource allocation information to the static time sequence analysis site, wherein the trigger resource allocation information comprises index information of the allocated data transmission channel and the actual data transmission time slot number; the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the wireless local area network communication standard IEEE802.11ax standard, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the actual data transmission time slot number;
if the data capacity of the current network is smaller than the number of available data transmission time slots of the current network, the wireless access point sends and sends triggering resource allocation information to the static time sequence analysis site, wherein the sending triggering resource allocation information comprises index information of the allocated data transmission channels and the number of available data transmission time slots of the current network; and the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the standard of wireless local area network communication standard IEEE802.11ax, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the number of data transmission time slots available for the current network.
2. The method of claim 1, wherein obtaining the number of data transmission slots currently available to the network comprises:
obtaining single data transmission duration which is equal to the sum of the length of a single video data transmission time slot, the length of the transmission time slot of a feedback response confirmation character frame sent by a wireless access point and the inter-frame interval of 2 data frame transmissions;
obtaining the maximum available time length of the current time period; the maximum available time length of the current time period is equal to the maximum time length of the current beacon period minus the time length of a contention phase in the beacon period, the time length of a data feedback phase in the beacon period, and the time length of a data retransmission phase in the beacon period, and is specifically shown in a calculation manner of formula (1):
p＝(1/f)-x-y-z,z＝RSlotsd(n)×(t1+t2+2t3) (1)；
wherein, p represents the maximum available time length of the current time period; f represents a video frame rate; x represents the length of time of the contention phase in the beacon period; y represents the time length of the data feedback phase in the beacon period; z represents the time length of the data retransmission phase in the beacon period; rslotsd (n) represents the number of available data transmission slots for the current time period; (t)1+t2+2t3) The time length of a data retransmission stage in a beacon period is equal to the product of the available data transmission time slot number of the current time period and the time data transmission time length; t is t1Indicating a single video data transmission slot length; t is t2The length of a transmission time slot of a feedback response confirmation character frame sent by the wireless access point is represented; t is t3An inter-frame space representing the transmission of a data frame; n represents the number of the current beacon period;
obtaining the number of data transmission time slots available for the current network according to the maximum available time length of the current time period, the length of a single video data transmission time slot, the length of the transmission time slot of a feedback response acknowledgement character frame sent by a wireless access point and the inter-frame interval of 2 data frame transmissions, and specifically calculating according to the mode of formula (2):
TSlote(n)＝(p-t1-t2)/(t1+t2+2t3) (2)；
where tsgate (n) represents the number of data transmission slots currently available to the network.
3. The method of claim 2, wherein the obtaining the actual number of data transmission slots according to the current network transmission rate and the amount of data required for transmission in the static timing analysis networking comprises:
obtaining the quotient of the transmission data volume required by the static time sequence analysis networking and the current network transmission rate as the actual data transmission time slot number, and specifically obtaining the quotient according to the calculation mode of a formula (3):
TSlot(n)'＝TXOPALL/S (3)
wherein tslot (n)' indicates the number of actual data transmission slots; TXOPALL represents the amount of transmission data required for static timing analysis networking; s denotes the current network transmission rate.
4. The method of claim 3, further comprising: if the calculated actual data transmission time slot number tslot (n)' is a non-integer, the non-integer actual data transmission time slot number is rounded down.
5. The method according to claim 4, wherein the obtaining the number of data transmission resources of the static timing analysis station currently allocating resources according to the number of data transmission required by the static timing analysis station currently allocating resources, the total number of channel resources, and the number of data transmission required by the static timing analysis networking comprises:
obtaining the data volume weight of the static time sequence analysis station according to the data volume needing to be transmitted and the data volume needing to be transmitted by the static time sequence analysis networking;
and acquiring the data transmission resource quantity of the static time sequence analysis station according to the data quantity weight of the static time sequence analysis station and the total channel resource quantity.
6. The method according to claim 5, wherein the data volume weight of the static time sequence analysis station is obtained according to the data volume required to be transmitted and the data volume required to be transmitted for static time sequence analysis networking, and is calculated according to the following formula (4):
Figure FDA0002561485420000031
wherein j is more than 0 and less than or equal to k, k is the number of static time sequence analysis sites included in the static time sequence analysis network, and k is a positive integer greater than or equal to 1; j. a is a positive integer greater than or equal to 1, a is used for representing the number of a static time sequence analysis station, and j represents the number of the static time sequence analysis station which currently allocates resources; TXOPjRepresenting the data quantity needing to be transmitted of the static time sequence analysis station of the current distributed resources; TXOPaRepresenting the data quantity needing to be transmitted of the a-th static time sequence analysis station; qjA data volume weight representing the static timing analysis site currently allocated resources; TXOPAll represents the required transmission data volume of the static timing analysis networking;
the data transmission resource quantity of the static time sequence analysis station is obtained according to the data weight of the static time sequence analysis station and the total channel resource quantity, and is specifically obtained by calculation according to the following formula (5):
Cj＝M×Qj (5)
wherein, CjRepresenting the number of data transmission resources of the static timing analysis station of the currently allocated resources, wherein M represents the total number of channel resources; if CjIs a non-integer, for non-integer CjRounding off to obtain the data transmission resource quantity of the static time sequence analysis site of the current distributed resources, wherein the data transmission resource quantity of the static time sequence analysis site of the current distributed resources is less than or equal to the total channel resource quantity.
7. A system for allocating data transmission resources in a communication network, the system comprising:
the acquisition module is used for acquiring the number of data transmission time slots available for the current network and acquiring the data quantity to be transmitted by each static time sequence analysis station in the static time sequence analysis networking; the number of data transmission time slots represents the number of times of information interaction in one data transmission process: obtaining the current network data capacity, wherein the current network data capacity is the product of the number of available data transmission time slots of the current network, the current network transmission rate and the time for transmitting a data frame;
the resource allocation module is used for acquiring the data transmission resource quantity of the static time sequence analysis site of the current allocated resources according to the data quantity required to be transmitted by the static time sequence analysis site of the current allocated resources, the total channel resource quantity and the data quantity required to be transmitted by the static time sequence analysis networking, allocating data transmission resources to the static time sequence analysis site according to the data quantity required to be transmitted, and sending resource allocation information to the static time sequence analysis site; the resource allocation information includes index information of the allocated data transmission channel; the data transmission resource comprises a data transmission channel; the data volume required to be transmitted by the static time sequence analysis networking is the sum of the data volumes required to be transmitted by all static time sequence analysis sites included in the static time sequence analysis networking; if the data capacity of the current network is larger than or equal to the number of the available data transmission time slots of the current network, analyzing the data transmission quantity required by networking according to the current network transmission rate and the static time sequence to obtain the number of the actual data transmission time slots; a wireless access point sends and sends trigger resource allocation information to the static time sequence analysis site, wherein the trigger resource allocation information comprises index information of the allocated data transmission channel and the actual data transmission time slot number; the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the wireless local area network communication standard IEEE802.11ax standard, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the actual data transmission time slot number; if the data capacity of the current network is smaller than the number of available data transmission time slots of the current network, the wireless access point sends and sends triggering resource allocation information to the static time sequence analysis site, wherein the sending triggering resource allocation information comprises index information of the allocated data transmission channels and the number of available data transmission time slots of the current network; and the static time sequence analysis site determines the frequency range of the static time sequence analysis site according to the mapping relation between the index information of the distributed data transmission channel and the index value in the standard of wireless local area network communication standard IEEE802.11ax, and transmits the video data required to be transmitted by the static time sequence analysis site according to the frequency range and the number of data transmission time slots available for the current network.
8. The system of claim 7, wherein obtaining the number of data transmission slots currently available to the network comprises:
obtaining single data transmission duration which is equal to the sum of the length of a single video data transmission time slot, the length of the transmission time slot of a feedback response confirmation character frame sent by a wireless access point and the inter-frame interval of 2 data frame transmissions;
obtaining the maximum available time length of the current time period; the maximum available time length of the current time period is equal to the maximum time length of the current beacon period minus the time length of a contention phase in the beacon period, the time length of a data feedback phase in the beacon period, and the time length of a data retransmission phase in the beacon period, and is specifically shown in a calculation manner of formula (1):
p＝(1/f)-x-y-z,z＝RSlotsd(n)×(t1+t2+2t3) (1)；
wherein, p represents the maximum available time length of the current time period; f represents a video frame rate; x represents the length of time of the contention phase in the beacon period; y represents the time length of the data feedback phase in the beacon period; z represents the time length of the data retransmission phase in the beacon period; rslotsd (n) represents the number of available data transmission slots for the current time period; (t)1+t2+2t3) Representing the duration of a single data transmission, the time length of the data retransmission phase in the beacon period is equal to the available time periodThe product of the number of data transmission time slots and the time of data transmission; t is t1Indicating a single video data transmission slot length; t is t2The length of a transmission time slot of a feedback response confirmation character frame sent by the wireless access point is represented; t is t3An inter-frame space representing the transmission of a data frame; n represents the number of the current beacon period;
obtaining the number of data transmission time slots available for the current network according to the maximum available time length of the current time period, the length of a single video data transmission time slot, the length of the transmission time slot of a feedback response acknowledgement character frame sent by a wireless access point and the inter-frame interval of 2 data frame transmissions, and specifically calculating according to the mode of formula (2):
TSlote(n)＝(p-t1-t2)/(t1+t2+2t3) (2)；
where tsgate (n) represents the number of data transmission slots currently available to the network.
9. The system of claim 7, wherein the obtaining the actual number of data transmission slots according to the current network transmission rate and the amount of data required for transmission in the static timing analysis networking comprises:
obtaining the quotient of the transmission data volume required by the static time sequence analysis networking and the current network transmission rate as the actual data transmission time slot number, and specifically obtaining the quotient according to the calculation mode of a formula (3):
TSlot(n)'＝TXOPALL/S (3)
wherein tslot (n)' indicates the number of actual data transmission slots; TXOPALL represents the amount of transmission data required for static timing analysis networking; s denotes the current network transmission rate.
10. The system according to claim 9, wherein the obtaining the number of data transmission resources of the static timing analysis station currently allocating resources according to the number of data transmission required by the static timing analysis station currently allocating resources, the total number of channel resources, and the number of data transmission required by the static timing analysis networking comprises:
obtaining the data volume weight of the static time sequence analysis station according to the data volume needing to be transmitted and the data volume needing to be transmitted by the static time sequence analysis networking;
obtaining the data transmission resource quantity of the static time sequence analysis station according to the data quantity weight of the static time sequence analysis station and the total channel resource quantity;
obtaining the data volume weight of the static time sequence analysis station according to the data volume required to be transmitted and the data volume required to be transmitted by the static time sequence analysis networking, and specifically obtaining the data volume weight by calculating according to the following formula (4):
Figure FDA0002561485420000051
wherein j is more than 0 and less than or equal to k, k is the number of static time sequence analysis sites included in the static time sequence analysis network, and k is a positive integer greater than or equal to 1; j. a is a positive integer greater than or equal to 1, a is used for representing the number of a static time sequence analysis station, and j represents the number of the static time sequence analysis station which currently allocates resources; TXOPjRepresenting the data quantity needing to be transmitted of the static time sequence analysis station of the current distributed resources; TXOPaRepresenting the data quantity needing to be transmitted of the a-th static time sequence analysis station; qjA data volume weight representing the static timing analysis site currently allocated resources; TXOPAll represents the required transmission data volume of the static timing analysis networking;
the data transmission resource quantity of the static time sequence analysis station is obtained according to the data weight of the static time sequence analysis station and the total channel resource quantity, and is specifically obtained by calculation according to the following formula (5):
Cj＝M×Qj (5)
wherein, CjRepresenting the number of data transmission resources of the static timing analysis station of the currently allocated resources, wherein M represents the total number of channel resources; if CjIs a non-integer, for non-integer CjRounding to obtain the static timing of currently allocated resourcesAnalyzing the number of data transmission resources of a station, wherein the number of data transmission resources of the static time sequence analysis station for currently allocated resources is less than or equal to the total number of channel resources.
CN202010614359.3A 2020-06-30 2020-06-30 Communication network data transmission resource allocation method and system Withdrawn CN111935828A (en)

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