CN109982436B - Wireless ad hoc network QoS time slot resource allocation method and device - Google Patents

Wireless ad hoc network QoS time slot resource allocation method and device Download PDF

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CN109982436B
CN109982436B CN201910235272.2A CN201910235272A CN109982436B CN 109982436 B CN109982436 B CN 109982436B CN 201910235272 A CN201910235272 A CN 201910235272A CN 109982436 B CN109982436 B CN 109982436B
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processed
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judging
retransmission times
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CN109982436A (en
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张雪芹
王霄峻
戴佳
陈晓曙
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Jiangsu Zhenghetong Information Technology Co ltd
Southeast University
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Southeast University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information

Abstract

A wireless ad hoc network QoS time slot resource allocation method comprises the following steps: generating the integral priority of each service to be processed by combining reinforcement learning according to the reliability value, the service priority value, the discarding priority value and the retransmission times of each service to be processed; and judging the retransmission times and the integral priority of each service to be processed, and allocating the bandwidth according to the judgment result. When the bandwidth of the service to be processed is distributed, the whole priority of each service to be processed is generated under the comprehensive consideration of various attributes of the QoS requirement of the service to be processed, including reliability, service priority, discarding priority and retransmission times, and the bandwidth is distributed under the consideration of the retransmission times and the whole priority of the service to be processed.

Description

Wireless ad hoc network QoS time slot resource allocation method and device
Technical Field
The present invention relates to a method for allocating network resources, and in particular, to a method and an apparatus for allocating QoS time slot resources in a wireless ad hoc network.
Background
The wireless ad hoc network is a wireless ad hoc multi-hop communication network, and typical wireless ad hoc network protocols comprise IEEE802.11mesh, IEEE802.16 mesh and the like. Wherein IEEE802.16 mesh is based on node synchronization and divides the available channel bandwidth resources into a plurality of schedulable time slots.
The IEEE802.16 standard divides traffic into 4 different types: the method comprises the steps that active authorization service (UGS), real-time polling service ((rtPS), non-real-time polling service ((nrtPS)) and best effort service (BE) are adopted, each service type has corresponding QoS parameters, and in a Mesh mode, a protocol connects identifiers CID in an MAC header to define QoS attributes such as reliability, priority and discarding priority, so that each service to BE processed has QoS requirements.
IEEE802.16 defines the architecture of slot scheduling. Each process of allocating bandwidth is called a scheduling frame, each scheduling frame comprises a scheduling control subframe and a data subframe, data exchange is carried out between nodes by using micro time slots in the data subframes, the scheduling control subframe carries out scheduling aiming at the micro time slots, and one or more micro time slots are allocated in each scheduling.
The 802.16Mesh network has two scheduling modes, namely a centralized scheduling mode and a distributed scheduling mode. However, each scheduling method only defines a scheduling architecture, and does not define a specific scheduling algorithm for allocating time slot resources for different QoS.
Therefore, how to reasonably allocate resources in the Mesh mode and consider various attributes of the QoS of the service to be processed becomes a problem to be solved currently.
Disclosure of Invention
The invention aims at the synchronous wireless ad hoc network similar to IEEE802.16 mesh and dispatches the available time slot to different service connections for use. The invention aims to provide a wireless ad hoc network QoS time slot resource allocation method and a wireless ad hoc network QoS time slot resource allocation device which comprehensively consider various attributes with QoS requirements.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a wireless ad hoc network QoS time slot resource allocation method comprises the following steps:
generating the integral priority of each service to be processed by combining reinforcement learning according to the reliability value, the service priority value, the discarding priority value and the retransmission times of each service to be processed;
and judging the retransmission times and the integral priority of each service to be processed, and allocating the bandwidth according to the judgment result.
The invention relates to a wireless ad hoc network QoS time slot resource allocation method, wherein, the whole priority of each service to be processed is generated according to the reliability value of each service to be processed, the service priority value, the discarding priority value and the retransmission times by combining reinforcement learning, and the method comprises the following steps:
judging whether the reliability value or the retransmission frequency of each service to be processed is 0, if so, judging that the reliability value or the retransmission frequency is 0;
calculating the integral priority of the corresponding service to be processed as Pt＝Pb+(4-Pd)；
Wherein, PtIndicates the overall priority of this time, PbIndicating the priority of the service, PdIndicating a drop priority.
The invention relates to a wireless ad hoc network QoS time slot resource allocation method, wherein,
judging whether the reliability of each service to be processed is 1, if so, judging whether the reliability of each service to be processed is 1;
judging whether the retransmission times of the service to be processed is between 1 and 4, if so, judging that the retransmission times of the service to be processed is between 1 and 4;
calculating the overall priority of the service to be processed into
Figure GDA0002393782180000021
PtRepresenting the whole priority of the service to be processed by Pt-1Representing the last overall priority, N, of the traffic to be processedrtIndicating the number of retransmissions, R is the action award, when NrtIs [1,2 ]]R is 1; when N is presentrtIs [3,4 ]]In between, R takes 0, α represents a learning speed factor, with a value range of [0,1 ].
The QoS time slot resource allocation method of the wireless ad hoc network judges whether the reliability of each service to be processed is 1, if so, judges whether the retransmission times exceed 4, and if so, discards the corresponding service.
The invention relates to a wireless ad hoc network QoS time slot resource allocation method, wherein, judging the retransmission times and the integral priority of the service to be processed, and allocating bandwidth according to the judgment result comprises the following steps:
judging whether the service to be processed has the service to be processed with the retransmission times reaching four times, if so, judging that the retransmission times reach four times;
judging the overall priority level of the service to be processed, the retransmission times of which reach four times;
judging whether the bandwidth judgment can meet the bandwidth requirements of the service to be processed with several retransmission times up to four times according to the overall priority level;
and distributing corresponding to-be-processed service bandwidth.
The invention relates to a wireless ad hoc network QoS time slot resource allocation method, wherein, if the judgment result is negative, then;
judging the overall priority level of all the services to be processed;
judging that the bandwidth can meet the bandwidth requirements of several to-be-processed services according to the overall priority level;
and distributing corresponding to-be-processed service bandwidth.
The invention discloses a wireless ad hoc network QoS time slot resource allocation device, which comprises a processing unit, wherein the processing unit is used for:
generating the integral priority of each service to be processed by combining reinforcement learning according to the reliability value, the service priority value, the discarding priority value and the retransmission times of each service to be processed;
and judging the retransmission times and the integral priority of each service to be processed, and allocating the bandwidth according to the judgment result.
The invention relates to a wireless ad hoc network QoS time slot resource allocation device, wherein a processing unit is used for: judging whether the reliability value or the retransmission frequency of each service to be processed is 0, if so, judging that the reliability value or the retransmission frequency is 0;
calculating the integral priority of the corresponding service to be processed as Pt＝Pb+(4-Pd)；
Wherein, PtIndicates the overall priority of this time, PbIndicating the priority of the service, PdIndicating a drop priority.
The invention relates to a wireless ad hoc network QoS time slot resource allocation device, wherein a processing unit is used for:
judging whether the reliability of each service to be processed is 1, if so, judging whether the reliability of each service to be processed is 1;
judging whether the retransmission times of the service to be processed is between 1 and 4, if so, judging that the retransmission times of the service to be processed is between 1 and 4;
calculating the overall priority of the service to be processed into
Figure GDA0002393782180000031
PtRepresenting the whole priority of the service to be processed by Pt-1Representing the last overall priority, N, of the traffic to be processedrtIndicating the number of retransmissions, R is the action award, when NrtIs [1,2 ]]R is 1; when N is presentrtIs [3,4 ]]In between, R takes 0, α represents a learning speed factor, with a value range of [0,1 ].
The invention relates to a wireless ad hoc network QoS time slot resource allocation device, wherein a processing unit is used for:
and judging whether the reliability of each service to be processed is 1, if so, judging whether the retransmission times exceed 4, and if so, discarding the corresponding service.
The invention relates to a wireless ad hoc network QoS time slot resource allocation device, wherein a processing unit is used for:
judging whether the service to be processed has the service to be processed with the retransmission times reaching four times, if so, judging that the retransmission times reach four times;
judging the overall priority level of the service to be processed, the retransmission times of which reach four times;
judging whether the bandwidth judgment can meet the bandwidth requirements of the service to be processed with several retransmission times up to four times according to the overall priority level;
and distributing corresponding to-be-processed service bandwidth.
The QoS timeslot resource allocation device for a wireless ad hoc network according to the present invention is characterized in that the processing unit is configured to: judging whether the service to be processed has the service to be processed with the retransmission times reaching four times, if not, judging whether the service to be processed has the service to be processed with the retransmission times reaching four times;
judging the overall priority level of all the services to be processed;
judging that the bandwidth can meet the bandwidth requirements of several to-be-processed services according to the overall priority level;
and distributing corresponding to-be-processed service bandwidth.
Compared with the prior art, the invention has the beneficial effects that:
when the bandwidth of the service to be processed is distributed, the whole priority of each service to be processed is generated under the comprehensive consideration of various attributes of the QoS requirement of the service to be processed, including reliability, service priority, discarding priority and retransmission times, and the bandwidth is distributed under the consideration of the retransmission times and the whole priority of the service to be processed.
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FIG. 1 is a schematic overall flow chart of the method of the present invention;
FIG. 2 is a schematic flow chart of method example 1 of the present invention;
FIG. 3 is a schematic flow chart of method embodiment 2 of the present invention;
FIG. 4 is a schematic flow chart of method embodiment 3 of the present invention;
FIG. 5 is a Mesh mode schedule frame structure;
Detailed Description
As shown in fig. 1, the present embodiment is a method for allocating QoS time slot resources of a wireless ad hoc network, including:
s100, generating the integral priority of each service to be processed according to the reliability value, the service priority value, the discarding priority value and the retransmission times of each service to be processed by combining reinforcement learning,
s200, judging the retransmission times and the whole priority of each service to be processed, and allocating bandwidth according to the judgment result.
When the method allocates the bandwidth of the service to be processed, the method generates the integral priority of each service to be processed under the comprehensive consideration of various attributes of the QoS requirement of the service to be processed, including reliability, service priority, discarding priority and retransmission times, and allocates the bandwidth under the consideration of the retransmission times and the integral priority of the service to be processed, so that when the bandwidth is allocated according to the method, the QoS requirement of the service can be met and the requirement of the retransmission service can be met under the premise of considering the priority of the traditional service.
The device for executing the method can be a processor or a digital signal processing chip (DSP) and the like.
As shown in fig. 2, the method for allocating QoS time slot resources in a wireless ad hoc network according to this embodiment 1, generating an overall priority of each service to be processed by combining reinforcement learning according to a reliability value, a service priority value, a discard priority value, and retransmission times of each service to be processed, includes:
s111, judging whether the reliability value or the retransmission frequency of each service to be processed is 0, if so, judging that the reliability value or the retransmission frequency is 0;
s112, calculating the whole priority of the corresponding service to be processed as Pb+(4-Pd)；
Wherein, PtIndicates the overall priority of this time, PbIndicating the priority of the service, PdIndicating drop priority
It should be noted that the reliability value is a value preset according to the service type, it should be noted that the reliability value is only 0 or 1, and is preset in the IEEE802.16 protocol, and is generally defined according to the service type, for example, the reliability of the video service is 1, the reliability of the short message service is 0, and the service priority and the discard priority are values preset in the IEEE802.16 protocol, and are transmitted from the upper layer protocol, and can be obtained through the connection identifier CID in the MAC header.
Illustratively, if the service of the service to be processed has a reliability value of 0, the service priority PbIs a mixture of a water-soluble polymer and a water-soluble polymer, and is 5,drop priority PdIf the reliability value is 1, then the overall priority is 5+ (4-1) ═ 8, this embodiment provides the priority of the pending service whose reliability and setting value or retransmission times are 0, and it can be seen from the embodiment that, for the pending service whose reliability value is 0, the service priority considers the reliability, the service priority and the drop priority together.
In the method for allocating QoS timeslot resources in a wireless ad hoc network provided in this embodiment 2, as shown in fig. 3, S121 determines whether reliability of each service to be processed is 1, if yes,
s122 judges whether the retransmission times of the service to be processed is between 1 and 4, if so, the retransmission times of the service to be processed is judged to be 1 to 4
S123, calculating the overall priority of the service to be processed as
Figure GDA0002393782180000061
PtRepresenting the whole priority of the service to be processed by Pt-1Representing the last overall priority, N, of the traffic to be processedrtIndicating the number of retransmissions, R is the action award, when NrtIs [1,2 ]]R is 1; when N is presentrtIs [3,4 ]]Meanwhile, R is 0, α indicates a learning speed factor, and the value range is [0,1 ], it should be noted that, the value α is determined as needed, for example, if the influence of the number of retransmissions is to be increased as needed, the value α is increased, and if the priority of the last overall service is to be increased, the value α is decreased.
If the service to be processed does not have bandwidth resources allocated in the last queue and meets certain conditions, the whole priority data of the current time is calculated when the priority of the current time is calculated, and the whole priority data of the last time is considered together.
For example, in the process of executing the processor, the following steps may be performed, where S121 determines whether the reliability of each to-be-processed service is 1, and if the determination result is yes, then;
s122a determines whether the retransmission frequency of each pending service is between 1 and 2, if yes, then;
s123a obtaining the last whole priority of the corresponding service to be processed, and calculating the whole priority of the service to be processed as (1- α) Pt-1+α*Nrt；
S122b judges whether the retransmission times is between 3-4, if yes, then;
s123b calculating the overall priority of the to-be-processed service as (1- α) Pt-1；
Illustratively, if α takes a value of 0.2 and the number of retransmissions is 2, the last defined overall priority P for the servicet-1If the total priority of the traffic to be processed is 7, the number of retransmissions is 3, and α is 0.2, the priority is (1-0.2) × 7 is 5.6.
The method for allocating QoS timeslot resources in a wireless ad hoc network according to this embodiment determines whether reliability of each service to be processed is 1, determines whether a retransmission frequency exceeds 4 if the determination result is yes, and discards the corresponding service if the determination result is yes.
Illustratively, if the reliability of a certain pending service is 1, but the number of retransmissions is 5, the service is discarded.
In the method for allocating QoS timeslot resources for a wireless ad hoc network provided in this embodiment 4, as shown in fig. 4, determining the retransmission times and priority of a service to be processed, and allocating bandwidth according to a determination result includes:
s210, judging whether the service to be processed has the service to be processed with the retransmission times reaching four times, if so, judging the retransmission times are not equal to the retransmission times;
s220, judging the overall priority level of the service to be processed, wherein the retransmission times reach four times;
s230, judging that the bandwidth judgment can meet the bandwidth requirements of the service to be processed with several retransmission times reaching four times according to the overall priority level;
s240 allocates a corresponding pending traffic bandwidth.
And preferentially distributing the bandwidth to the service to be processed with the retransmission times of four times, and sequentially distributing the bandwidth to the service to be processed according to the priority sequence.
In this embodiment, on the basis of giving priority to the retransmission times, the bandwidths that can satisfy several services to be processed are sequentially determined according to the bandwidths of the services to be processed and the priorities, the bandwidths of the services to be processed that can satisfy are allocated, and the influence of the retransmission times on the priorities is well handled.
Illustratively, the method may further include S250 dropping traffic that is not allocated with the bandwidth, and performing a dropping process on the traffic that is not allocated with the bandwidth.
The QoS timeslot resource allocation method for wireless ad hoc networks provided in this embodiment determines whether there is a pending service with a retransmission number of up to four times in the pending service, and if the determination result is negative,
s260 determines the overall priority level of all the pending services,
s270, judging that the bandwidth can meet the bandwidth requirements of several to-be-processed services according to the overall priority level;
s240 allocates a corresponding pending traffic bandwidth.
It should be noted that, in the embodiment, the influence of the retransmission times on the priority is considered, the influence of the priority on the whole processing process is well processed, and the allocating of the bandwidth according to the priority means that the bandwidths of the services to be processed are sequentially allocated according to the priority.
And according to the bandwidth and the bandwidth of the service to be processed, sequentially judging the bandwidths which can meet the requirements of several services to be processed according to the priority level, and distributing the bandwidths of the services to be processed which can meet the requirements.
Illustratively, the method may further include allocating the service without the allocated bandwidth and the overall priority data to a next pending service queue S280.
According to the bandwidth, the priority can be judged to meet the bandwidth requirements of several to-be-processed services, the corresponding to-be-processed service bandwidth is distributed, and the rest to-be-processed services enter the next request, so that the self-adjustment of a bandwidth distribution algorithm can be enhanced.
The foregoing detailed description describes an example of the QoS timeslot resource allocation method for wireless ad hoc networks provided in the present application. It is understood that the device for performing the above method includes hardware structures and/or software modules for performing the respective functions in order to realize the above functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The present application may perform functional unit division on the apparatus for processing the wireless ad hoc network QoS timeslot resource allocation method according to the above method example, for example, each functional unit may be divided according to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the units in the present application is schematic, and is only one division of logic functions, and there may be another division manner in actual implementation.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, which is defined by the claims.

Claims (7)

1. A wireless ad hoc network QoS time slot resource allocation method is characterized by comprising the following steps:
generating the integral priority of each service to be processed by combining reinforcement learning according to the reliability value, the service priority value, the discarding priority value and the retransmission times of each service to be processed;
judging the retransmission times and the integral priority of each service to be processed, and allocating bandwidth according to the judgment result; generating the overall priority of each service to be processed by combining reinforcement learning according to the reliability value, the service priority value, the discarding priority value and the retransmission times of each service to be processed, and the method comprises the following steps:
judging whether the reliability value or the retransmission frequency of each service to be processed is 0, if so, judging that the reliability value or the retransmission frequency is 0;
calculating the integral priority of the corresponding service to be processed as Pt=Pb+(4-Pd)；
Wherein, PtIndicates the overall priority of this time, PbIndicating the priority of the service, PdIndicating a drop priority;
judging the retransmission times and the integral priority of the service to be processed, and allocating the bandwidth according to the judgment result comprises the following steps:
judging whether the service to be processed has the service to be processed with the retransmission times reaching four times, if so, judging that the retransmission times reach four times;
judging the overall priority level of the service to be processed, the retransmission times of which reach four times;
judging whether the bandwidth judgment can meet the bandwidth requirements of the service to be processed with several retransmission times up to four times according to the overall priority level;
and distributing corresponding to-be-processed service bandwidth.
2. The wireless ad hoc network QoS timeslot resource allocation method of claim 1,
judging whether the reliability of each service to be processed is 1, if so, judging whether the reliability of each service to be processed is 1;
judging whether the retransmission times of the service to be processed is between 1 and 4, if so, judging that the retransmission times of the service to be processed is between 1 and 4;
calculating the integral priority of the service to be processed as Pt=⌈(1-α）*Pt-1+α*Nrt*R⌉
PtRepresenting the whole priority of the service to be processed by Pt-1Representing the last overall priority, N, of the traffic to be processedrtIndicating the number of retransmissions, R is the action award, when NrtIs [1,2 ]]R isTaking the value as 1; when N is presentrtIs [3,4 ]]In between, R takes 0, α represents a learning speed factor, with a value range of [0,1 ].
3. The method of claim 1, wherein the reliability of each service to be processed is determined to be 1, if yes, the number of retransmissions is determined to exceed 4, and if yes, the corresponding service is discarded.
4. The method of claim 1, wherein if the determination result is negative, then;
judging the overall priority level of all the services to be processed;
judging that the bandwidth can meet the bandwidth requirements of several to-be-processed services according to the overall priority level;
and distributing corresponding to-be-processed service bandwidth.
5. A wireless ad hoc network QoS timeslot resource allocation apparatus, comprising a processing unit configured to:
generating the integral priority of each service to be processed by combining reinforcement learning according to the reliability value, the service priority value, the discarding priority value and the retransmission times of each service to be processed;
judging the retransmission times and the integral priority of each service to be processed, and allocating bandwidth according to the judgment result; the processing unit is configured to: judging whether the reliability value or the retransmission frequency of each service to be processed is 0, if so, judging that the reliability value or the retransmission frequency is 0;
calculating the integral priority of the corresponding service to be processed as Pt=Pb+(4-Pd)；
Wherein, PtIndicates the overall priority of this time, PbIndicating the priority of the service, PdIndicating a drop priority;
judging the retransmission times and the integral priority of the service to be processed, and allocating the bandwidth according to the judgment result comprises the following steps:
judging whether the service to be processed has the service to be processed with the retransmission times reaching four times, if so, judging that the retransmission times reach four times;
judging the overall priority level of the service to be processed, the retransmission times of which reach four times;
judging whether the bandwidth judgment can meet the bandwidth requirements of the service to be processed with several retransmission times up to four times according to the overall priority level;
and distributing corresponding to-be-processed service bandwidth.
6. The wireless ad hoc network QoS slot resource allocation apparatus according to claim 5, wherein said processing unit is configured to:
judging whether the reliability of each service to be processed is 1, if so, judging whether the reliability of each service to be processed is 1;
judging whether the retransmission times of the service to be processed is between 1 and 4, if so, judging that the retransmission times of the service to be processed is between 1 and 4;
calculating the integral priority of the service to be processed as Pt=⌈(1 -α）*Pt-1+α*Nrt*R⌉
PtRepresenting the whole priority of the service to be processed by Pt-1Representing the last overall priority, N, of the traffic to be processedrtIndicating the number of retransmissions, R is the action award, when NrtIs [1,2 ]]R is 1; when N is presentrtIs [3,4 ]]In between, R takes 0, α represents a learning speed factor, with a value range of [0,1 ].
7. The wireless ad hoc network QoS slot resource allocation apparatus according to claim 6, wherein said processing unit is configured to:
and judging whether the reliability of each service to be processed is 1, if so, judging whether the retransmission times exceed 4, and if so, discarding the corresponding service.
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