CN109257078B - QoS-based SLNR (Signal to noise ratio) rule optimized multi-user communication method and device - Google Patents

QoS-based SLNR (Signal to noise ratio) rule optimized multi-user communication method and device Download PDF

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CN109257078B
CN109257078B CN201811092867.9A CN201811092867A CN109257078B CN 109257078 B CN109257078 B CN 109257078B CN 201811092867 A CN201811092867 A CN 201811092867A CN 109257078 B CN109257078 B CN 109257078B
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user equipment
user
qos
slnr
sets
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CN109257078A (en
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忻向军
张琦
田清华
陶滢
王宜欣
张伟
田凤
曹桂兴
高梓贺
陈东
沈宇飞
王拥军
杨雷静
刘乃金
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Beijing University of Posts and Telecommunications
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • 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
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • 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

Abstract

The embodiment of the invention provides a QoS-based method and a QoS-based device for optimizing multi-user communication by an SLNR (Signal to noise ratio) rule, wherein the method comprises the following steps: acquiring and determining SLNR of user equipment in a set of alternative user equipment; determining QoS grade of each user equipment in the alternative user equipment set according to the preset corresponding relation between the current service type and the QoS grade of the user equipment; classifying user equipments having the same QoS class; establishing a plurality of selected user sets; selecting the user equipment with the maximum SLNR from each user equipment set, and moving the user equipment with the maximum SLNR to the corresponding selected user set; processing each user equipment set one by one according to the sequence of the QoS grade of each user equipment set from high to low; and carrying out frame transmission on the current user equipment in all the selected user sets. The embodiment of the invention can also improve the service quality of the user equipment with high QoS requirement while ensuring the fairness.

Description

QoS-based SLNR (Signal to noise ratio) rule optimized multi-user communication method and device
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a method and an apparatus for optimizing multi-user communication based on a QoS (signal to noise ratio) criterion.
Background
MIMO (Multiple-Input Multiple-Output) technology is a technology capable of independently transmitting signals by using Multiple antennas at a transmitting end, and simultaneously receiving and recovering original information by using Multiple antennas at a receiving end, and has become one of key technologies of a wireless communication system as communication technology is continuously developed.
The MU-MIMO communication model is called a Multi-user multiple-input multiple-Output communication model. In the MU-MIMO communication model, in order to improve multi-user diversity, when a base station communicates with a plurality of users at the same time, the base station should select a user with a good channel state and small inter-user interference for communication. And users are selected through a reasonable scheduling strategy, so that the system obtains higher capacity and system performance.
In a communication system based on the MU-MIMO communication model, different user equipments have different requirements for QoS (Quality of service). For example, for a user equipment with high real-time communication demand, the QoS demand is relatively high. Under the condition that a plurality of user equipment have different QoS requirements, the conventional polling scheduling algorithm based on fairness can ensure fairness by polling the plurality of user equipment, but easily enables the user equipment with high QoS requirements to be in waiting state all the time, thereby influencing the service quality of the user equipment.
Disclosure of Invention
The embodiment of the invention aims to provide a QoS-based SLNR (Signal to noise ratio) rule optimized multi-user communication method and device so as to improve the service quality of user equipment with high QoS requirements. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a QoS-based SLNR criterion optimization multi-user communication method, applied to a base station in a multi-user multiple-input multiple-output MU-MIMO communication system, where the method includes:
acquiring an alternative user equipment set, and determining SLNR information of each user equipment in the alternative user equipment set, wherein the alternative user equipment set comprises: a set of user equipments connected to the base station and waiting for communication;
determining the QoS grade of each user equipment in the alternative user equipment set according to the preset corresponding relation between the current service type of the user equipment and the QoS grade;
classifying the user equipment with the same QoS grade aiming at the user equipment in the alternative user equipment set to obtain a plurality of user equipment sets, wherein each user equipment set corresponds to one QoS grade;
establishing a plurality of selected user sets, wherein the selected user sets are as follows: the user equipment sets are selected by the base station and used for transmitting the current frame, and each selected user set corresponds to one user equipment set with the QoS level consistent with that of the selected user set;
selecting the user equipment with the largest SLNR from each user equipment set, and moving the selected user equipment with the largest SLNR to the corresponding selected user set;
according to the sequence of the QoS grade of each user equipment set from high to low, the following processing is carried out on each user equipment set one by one: moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all the user equipment are integrated into an empty set;
and carrying out frame transmission on the current user equipment in all the selected user sets.
Preferably, the step of determining the QoS class of each ue in the candidate ue set according to the preset correspondence between the current service type of the ue and the QoS class includes:
when the current service type of the user equipment is data throughput limited service, determining the QoS grade of the user equipment as a first grade;
when the current service type of the user equipment is delay limited service, determining the QoS grade of the user equipment as a second grade;
when the current service type of the user equipment is unlimited service, determining that the QoS grade of the user equipment is a third grade; wherein the priorities of the first level, the second level and the third level are sequentially decreased.
Preferably, the step of classifying the ues having the same QoS class to obtain a plurality of ue sets includes:
classifying user equipment with a first QoS (quality of service) grade to obtain a first user equipment set;
classifying the user equipment with the QoS grade of the second grade to obtain a second user equipment set;
and classifying the user equipment with the QoS grade of the third grade to obtain a third user equipment set.
Preferably, the step of establishing a plurality of selected user sets comprises:
establishing a first selected user set, a second selected user set and a third selected user set, wherein the QoS grade of the first selected user set is a first grade, the QoS grade of the second selected user set is a second grade, and the QoS grade of the third selected user set is a third grade.
Preferably, the step of moving the remaining ues in the ue set to the selected ue set corresponding to the ue set one by one according to the sequence from high to low of the SLNR, and comparing the sum of the current ue number in all the selected ue sets with the preset threshold after each movement includes:
moving the rest user equipment in the first user equipment set to a first selected user set one by one according to the sequence of SLNR from high to low, and comparing the sum of the number of the current user equipment in all the selected user sets with the size of a preset threshold value after moving each time;
if the sum of the current user equipment number in all the selected user sets is smaller than a preset threshold value and the first user equipment is integrated into an empty set, moving the remaining user equipment in the second user equipment set to the second selected user set one by one according to the sequence from SLNR from high to low, and comparing the sum of the current user equipment number in all the selected user sets with the preset threshold value after moving each time;
and if the sum of the current user equipment number in all the selected user sets is smaller than a preset threshold value and the second user equipment is integrated into an empty set, moving the rest user equipment in the third user equipment set to the third selected user set one by one according to the sequence from SLNR (Signal to noise ratio) from high to low, and comparing the sum of the current user equipment number in all the selected user sets with the preset threshold value after each movement.
Preferably, the step of performing frame transmission on current ues in all the selected ue sets includes:
and if the sum of the number of the current user equipment in all the selected user sets is less than a preset threshold value and the third user equipment is integrated into an empty set, carrying out frame transmission on the current user equipment in all the selected user sets.
In a second aspect, an embodiment of the present invention provides an apparatus for optimizing multiuser communication based on QoS SLNR criterion, applied to a base station in a MU-MIMO communication system, the apparatus including:
an obtaining module, configured to obtain an alternative user equipment set, and determine SLNR information of each user equipment in the alternative user equipment set, where the alternative user equipment set is: a set of user equipments connected to the base station and waiting for communication;
a determining module, configured to determine, according to a preset correspondence between a current service type of the user equipment and a QoS class, a QoS class of each user equipment in the candidate user equipment set;
a classifying module, configured to classify, for the user equipments in the candidate user equipment sets, the user equipments having the same QoS class to obtain multiple user equipment sets, where each user equipment set corresponds to one QoS class;
an establishing module configured to establish a plurality of selected user sets, the selected user sets being: the user equipment sets are selected by the base station and used for transmitting the current frame, and each selected user set corresponds to one user equipment set with the QoS level consistent with that of the selected user set;
a selecting module, configured to select a ue with the largest SLNR from each ue set, and move the selected ue with the largest SLNR to the corresponding selected ue set;
a moving module, configured to perform the following processing on each user equipment set one by one according to a sequence from high QoS levels to low QoS levels of the user equipment sets: moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all the user equipment are integrated into an empty set;
and the transmission module is used for transmitting frames to the current user equipment in all the selected user sets.
Preferably, the determining module includes:
a first determining submodule, configured to determine, when the current service type of the user equipment is a data throughput limited service, that a QoS class of the user equipment is a first class;
a second determining submodule, configured to determine, when the current service type of the user equipment is a delay limited service, that the QoS class of the user equipment is a second class;
a third determining submodule, configured to determine, when the current service type of the user equipment is an unlimited service, that the QoS class of the user equipment is a third class; wherein the priorities of the first level, the second level and the third level are sequentially decreased.
In a third aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete mutual communication through the communication bus; the machine-readable storage medium stores machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: the method steps for optimizing the multi-user communication method based on the SLNR criterion of the QoS provided by the first aspect of the embodiment of the invention are realized.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, having a computer program stored therein, where the computer program is executed by a processor to perform the method steps of the QoS-based SLNR criterion optimization multi-user communication method provided in the first aspect of the embodiment of the present invention.
The method and the device for optimizing multi-user communication based on the SLNR rule of the QoS provided by the embodiment of the invention comprise the steps of firstly, selecting the user equipment with the maximum SLNR from each user equipment set, and moving the selected user equipment with the maximum SLNR to the corresponding selected user set, so that the user equipment with higher SLNR in the user equipment is treated equally, and fairness is ensured; then, according to the sequence of the QoS grades of the user equipment sets from high to low, the user equipment sets are processed one by one, so that the user equipment with the high QoS grade is preferentially selected by the base station for data transmission. Whether the user equipment can be selected by the base station for data transmission or not is influenced by the SLNR (Signal to noise ratio) size factor and the QoS (quality of service) grade factor of the user equipment, so that the fairness is ensured, and the service quality of the user equipment with high QoS (quality of service) requirements can be improved. Of course, it is not necessary for any product or method of practicing the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a QoS-based SLNR method for optimizing multi-user communication according to an embodiment of the present invention;
FIG. 2 is a diagram of a MU-MIMO communication system model architecture;
fig. 3 is a schematic structural diagram of an embodiment of the present invention for optimizing a multi-user communication apparatus based on QoS SLNR criteria;
FIG. 4 is a schematic structural diagram of a determination module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a QoS-based method for optimizing multiuser communication by using SLNR criteria, which is applied to a base station in a multiuser multiple-input multiple-output (MU-MIMO) communication system, and the method may include the following steps:
s101, acquiring an alternative user equipment set, and determining SLNR information of each user equipment in the alternative user equipment set.
As shown in fig. 2, which is a model architecture diagram of a MU-MIMO communication system, a base station can simultaneously communicate with multiple users. In the MU-MIMO communication system model,suppose a base station serves K users, and the base station transmitting antenna is MTThe k-th user configures the antenna as Nk，sk(K1, 2.. K.) denotes the transmitted data symbols for the kth user, which are first passed through an mx 1 precoding vector WkM data streams are transmitted through MT antennas, and a receiving vector of each user at a receiving end passes through a preset detection matrix rkFinally, output symbols are generated
Figure BDA0001804799540000061
The base station may scan the ue connected to the base station to obtain an alternative ue set U, U ═k|k＝1，...，KallI.e. the full set of user equipments. In MU-MIMO communication system, it is assumed that alternative user equipment set U has K in commonallBut the system can actually serve only K user equipments, and there are N user selection methods, which are expressed as:
Figure BDA0001804799540000071
for user k, the received signal is:
Figure BDA0001804799540000072
in the formula (1), HkN representing the kth user equipmentkA channel matrix of x M dimensions; wkRepresenting a precoding vector; skA transmission data symbol representing a k-th user; n iskRepresenting the noise, is an i.i.d. (independent equal distribution) with zero mean and variance of σ2Complex gaussian random variable of (a)2Representing white gaussian noise; hkWkskRepresents a useful signal;
Figure BDA0001804799540000073
indicating co-channel interference.
Then the symbol is output
Figure BDA0001804799540000074
Can be expressed as:
Figure BDA0001804799540000075
considering signal leakage, i.e. interference of the desired user to other users, the SLNR of user k according to equation (1)kExpressed as:
Figure BDA0001804799540000076
in the formula (3), the reaction mixture is,
Figure BDA0001804799540000077
to represent
Figure BDA0001804799540000078
The trace of (2); n is a radical ofkσ2Representing a noise figure;
Figure BDA0001804799540000079
to represent
Figure BDA00018047995400000710
The change of (c).
In order to minimize the Interference of the ue to all other ues in the system, in the embodiment of the present invention, the Interference cancellation is converted into leakage cancellation, that is, the Signal-to-Interference-plus-noise ratio (SINR) maximization is converted into the SLNR maximization. The SLNR is a signal to leakage noise ratio, which is simply referred to as a signal to leakage noise ratio, and is a ratio obtained by dividing the signal power of the selected ue by the sum of the power leaked by the ue to other ues and the noise power.
The SLNR precoding matrix is obtained by finding a precoding matrix for each user to satisfy the following conditions:
Figure BDA00018047995400000711
Figure BDA0001804799540000081
equation (4) represents the general Rayleigh entropy problem, the optimized precoding vector W for the kth userkIs a matrix
Figure BDA0001804799540000082
SLNR when the feature vector corresponding to the maximum feature value is presentkThe maximum of the number of bits, i.e.,
Figure BDA0001804799540000083
wherein the content of the first and second substances,
Figure BDA0001804799540000084
representation matrix
Figure BDA0001804799540000085
The maximum eigenvalue of (c).
As can be seen from the above derivation, in the embodiment of the present invention, the maximum SLNR value of each ue in the candidate ue set U may be calculated according to equation (4).
As an optional implementation manner in the embodiment of the present invention, the SLNR of each ue in the candidate ue set may be calculated in a traversal manner according to the time sequence of obtaining each ue.
S102, determining the QoS grade of each user equipment in the alternative user equipment set according to the preset corresponding relation between the current service type of the user equipment and the QoS grade.
The current service types of different user equipments may be different, for example, some user equipments are performing a call service, some user equipments are performing a video playing service, and some user equipments are performing a file downloading service. Different service types have different QoS requirements, that is, different service types correspond to different QoS classes, so that corresponding relations between different service types and different QoS classes can be established in advance, and then the QoS classes of each user equipment in the alternative user equipment set U are determined according to the preset corresponding relations between the current service types of the user equipment and the QoS classes.
Since the QoS requirements of the real-time users and the non-real-time users are different, which results in the difference of the transmission rate requirements, the service types can be divided according to the different QoS requirements.
As an optional implementation manner in the embodiment of the present invention, the service types of the user equipment may be divided into: the data transmission method comprises the following steps of data throughput limited service, delay limited service and unlimited service, wherein the QoS grade corresponding to the data throughput limited service is a first grade, the QoS grade corresponding to the delay limited service is a second grade, the QoS grade corresponding to the unlimited service is a third grade, and the priorities of the first grade, the second grade and the third grade are sequentially reduced.
And, the user equipments can BE divided into three classes, that is, a CR (constant rate) user equipment, an RT (real time) user equipment, and a BE (best effort) user equipment, where the QoS class of the CR user equipment is a first class, the QoS class of the RT user equipment is a second class, and the QoS class of the BE user equipment is a third class.
S103, classifying the user equipment with the same QoS grade aiming at the user equipment in the alternative user equipment set to obtain a plurality of user equipment sets.
After determining the QoS class of each user equipment in the candidate user equipment set U, the user equipments having the same QoS class may be classified. In particular, user equipments with a QoS level of a first level may be categorized into a first set of user equipments UCR＝{ul|l＝1，...，KCRIn the method, all the user equipment in the set are CR user equipment; the user equipments with the second QoS class can be classified into a second user equipment set URT＝{ul|l＝1，...，KRTIn the method, all the user equipment in the set are RT user equipment; the user equipments with the QoS class of the third class can be classified into a third user equipment set UBE＝{ul|l＝1，...，KBEAnd all the user equipment in the set are BE user equipment. The above user equipment sets are not overlapped, and K is equal to KCR+KRT+KBE。
S104, a plurality of selected user sets are established.
In the embodiment of the present invention, the selected user set refers to a set of user equipments selected by the base station for transmitting the current frame, and a plurality of selected user sets may be established according to the QoS levels determined in the foregoing, and each selected user set may correspond to a user equipment set having a QoS level consistent with that of the selected user set.
Illustratively, three selected user sets may be established, respectively: first selected user set SCRSecond selected user set SRTAnd a third selected user set SBEWherein S isCRAnd UCRAre consistent with the QoS level of, i.e., SCRAnd UCRCorresponding; sRTAnd URTAre consistent with the QoS level of, i.e., SRTAnd URTCorresponding; sBEAnd UBEAre consistent with the QoS level of, i.e., SBEAnd UBEAnd (7) corresponding.
And S105, selecting the user equipment with the maximum SLNR from each user equipment set, and moving the selected user equipment with the maximum SLNR to the corresponding selected user set.
Can be selected to belong to U respectivelyCR、URT、UBEThe user equipment with the largest SLNR moves the three user equipment with the largest SLNR to the selected user set corresponding to the user equipment set, and the three user equipment with the largest SLNR are respectively represented as:
SCR＝{ul|l＝1，...，KCR&max(SLNR(ul))}
SRT＝{ul|l＝1，...，KRT&max(SLNR(ul))}
SBE＝{ul|l＝1，...，KBE&max(SLNR(ul))}
the sum of the current number of user devices in all selected user sets, denoted as S ═ S, may then be calculatedCR∪SRT∪SBE。
S106, according to the sequence of the QoS grades of the user equipment sets from high to low, the following processing is carried out on the user equipment sets one by one: moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all user devices are integrated into an empty set.
In the embodiment of the present invention, as can be seen from the foregoing, the QoS class of each ue set is already determined, and the SLNR of each ue in each ue set is already acquired, so that each ue set can be processed one by one according to the sequence of QoS classes from high to low, where the processing procedure specifically includes:
moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all user devices are integrated into an empty set.
It is easy to understand that, in step S105, the user equipment with the largest SLNR in each user equipment set has been moved to the corresponding alternative user set, then in this step, the remaining user equipments in the user equipment set are processed, and all the user equipment sets are processed one by one in the order of QoS levels from high to low. That is, the user equipment to be transmitted is selected from the user equipment set with the highest QoS grade, and the selection is stopped until the number of the selected user equipment is equal to the threshold value; if the user equipment in the user equipment set with the highest QoS grade is completely selected at the moment, but the number of the selected user equipment is not equal to the threshold value, continuing to select the user equipment to be transmitted from the user equipment set with the highest QoS grade, repeating the process until the number of the selected user equipment is equal to the threshold value, namely, until the sum of the current number of the user equipment in all the selected user sets is equal to the maximum number of users which can be served by the base station, and stopping selection; or stopping selecting until all the user equipment in the user equipment set is selected as the user equipment to be transmitted.
As an optional implementation manner of the embodiment of the present invention, the step S106 includes:
a first user equipment set UCRThe rest user equipments in the list move to the first selected user set S one by one according to the SLNR from high to lowCRAnd comparing the sum of the number of the current user equipment in all the selected user sets S with the size of a preset threshold value after each movement.
After the number of the user equipment is determined, the number of the user equipment can be compared with the number K of the user equipment which can be served by the system, and if the number of the user equipment is smaller than a preset threshold value K, the slave UCRSelecting the user equipment with the maximum SLNR from the rest user equipment, and moving the user equipment to SCRIn, i.e. updating the set of user equipments SCR＝SCR∪{ul|l＝1，...，KCR&max(SLNR(ul) Get the new selected user equipment complete set S ═ S }CR∪SRT∪SBEAnd compares the updated number of user devices with K.
If the sum of the current user equipment number in all the selected user sets S is less than a preset threshold value K, and UCRIf the user equipment becomes an empty set, the second user equipment set is URTThe rest user equipments in the list move to the second selected user set S one by one according to the SLNR from high to lowRTAnd comparing the sum of the number of the current user equipment in all the selected user sets S with the size of a preset threshold value after each movement.
If S is less than K, then the slave URTSelecting the user equipment with the maximum SLNR from the rest user equipment, and moving the user equipment to the URTIn, i.e. updating the set of user equipments SRT＝SRT∪{ul|l＝1，...，KRT&max(SLNR(ul) Get the new selected user equipment complete set S ═ S }CR∪SRT∪SBEAnd compares the updated number of user devices with K.
If all the selected user set S has the current user settingThe sum of the standby quantities is less than a preset threshold value K, and URTIf the user equipment becomes an empty set, a third user equipment set U is setBEThe rest user equipments in the list move to the third selected user set S one by one according to the SLNR from high to lowBEAnd comparing the sum of the number of the current user equipment in all the selected user sets S with the size of a preset threshold value after each movement.
If S is still less than K, then the slave UBESelecting the user equipment with the maximum SLNR from the rest user equipment, and moving the user equipment to the UBEIn, i.e. updating the set of user equipments SBE＝SBE∪{ul|l＝1，...，KRT&max(SLNR(ul) Get the new selected user equipment complete set S ═ S }CR∪SRT∪SBEAnd compares the updated number of user devices with K. Until the sum of the number of the current user equipment in all the selected user sets is equal to a preset threshold value; or until all user devices are integrated into an empty set.
And S107, carrying out frame transmission on the current user equipment in all the selected user sets.
It is easy to understand that, after each movement, the sum of the current user equipment quantities in all the selected user sets and the size of the preset threshold are determined, so as to increase the current user equipment quantities in all the selected user sets, the sum of the current user equipment quantities is equal to the preset threshold, that is, the total user equipment set
Figure BDA0001804799540000121
Or, a situation occurs where all user equipments are integrated into an empty set; when the above situation occurs, frame transmission may be performed on the user equipments in the user set currently selected, frame data passes through one M × 1 precoding vector Wk, and M data streams pass through MTOne antenna transmission, i.e. M-MT. After the current frame is transmitted, the preparation for transmission of the next frame can begin.
The method for optimizing the multi-user communication based on the SLNR rule of the QoS comprises the following steps of firstly, selecting the user equipment with the maximum SLNR from each user equipment set, and moving the selected user equipment with the maximum SLNR to the corresponding selected user set, so that the user equipment with higher SLNR in the user equipment is treated equally, and fairness is ensured; then, according to the sequence of the QoS grades of the user equipment sets from high to low, the user equipment sets are processed one by one, so that the user equipment with the high QoS grade is preferentially selected by the base station for data transmission. Whether the user equipment can be selected by the base station for data transmission or not is influenced by the SLNR (Signal to noise ratio) size factor and the QoS (quality of service) grade factor of the user equipment, so that the fairness is ensured, and the service quality of the user equipment with high QoS (quality of service) requirements can be improved.
A specific embodiment of the QoS-based SLNR criterion optimization multi-user communication device according to an embodiment of the present invention corresponds to the flow shown in fig. 1, and referring to fig. 3, fig. 3 is a schematic structural diagram of the QoS-based SLNR criterion optimization multi-user communication device according to an embodiment of the present invention, including:
an obtaining module 201, configured to obtain an alternative user equipment set, and determine SLNR information of each user equipment in the alternative user equipment set, where the alternative user equipment set is: a set of user equipments connected to the base station and waiting for communication.
The determining module 202 is configured to determine, according to a preset corresponding relationship between a current service type of the user equipment and a QoS class, a QoS class of each user equipment in the candidate user equipment set.
A classifying module 203, configured to classify, for the user equipments in the alternative user equipment sets, the user equipments having the same QoS class to obtain multiple user equipment sets, where each user equipment set corresponds to one QoS class.
An establishing module 204, configured to establish a plurality of selected user sets, where a selected user set is: and each selected user set corresponds to a user equipment set with the QoS level consistent with that of the selected user set.
A selecting module 205, configured to select a ue with the largest SLNR from each ue set, and move the selected ue with the largest SLNR to the corresponding selected ue set.
A moving module 206, configured to perform the following processing on each user equipment set one by one according to the order from high QoS class to low QoS class of each user equipment set: moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all user devices are integrated into an empty set.
A transmission module 207, configured to perform frame transmission on current user equipments in all the selected user sets.
The determining module 202, as shown in fig. 4, includes:
the first determining submodule 2021 is configured to determine, when the current service type of the user equipment is data throughput limited service, that the QoS class of the user equipment is a first class.
The second determining submodule 2022 is configured to determine, when the current service type of the user equipment is the delay limited service, that the QoS class of the user equipment is the second class.
The third determining submodule 2023 is configured to determine, when the current service type of the user equipment is the unrestricted service, that the QoS class of the user equipment is a third class; wherein the priorities of the first level, the second level and the third level are sequentially decreased.
The classifying module 203, among others, includes:
and the first classification submodule is used for classifying the user equipment with the QoS grade of the first grade to obtain a first user equipment set.
And the second classification submodule is used for classifying the user equipment with the QoS grade of the second grade to obtain a second user equipment set.
And the third classification submodule is used for classifying the user equipment with the QoS grade of the third grade to obtain a third user equipment set.
The establishing module 204 is specifically configured to:
establishing a first selected user set, a second selected user set and a third selected user set, wherein the QoS grade of the first selected user set is a first grade, the QoS grade of the second selected user set is a second grade, and the QoS grade of the third selected user set is a third grade.
The moving module 206 is specifically configured to:
moving the rest user equipment in the first user equipment set to a first selected user set one by one according to the sequence of SLNR from high to low, and comparing the sum of the number of the current user equipment in all the selected user sets with the size of a preset threshold value after moving each time;
if the sum of the current user equipment number in all the selected user sets is smaller than a preset threshold value and the first user equipment is integrated into an empty set, moving the remaining user equipment in the second user equipment set to the second selected user set one by one according to the sequence from SLNR from high to low, and comparing the sum of the current user equipment number in all the selected user sets with the preset threshold value after moving each time;
and if the sum of the current user equipment number in all the selected user sets is smaller than a preset threshold value and the second user equipment is integrated into an empty set, moving the rest user equipment in the third user equipment set to the third selected user set one by one according to the sequence from SLNR (Signal to noise ratio) from high to low, and comparing the sum of the current user equipment number in all the selected user sets with the preset threshold value after each movement.
The transmission module 207 is specifically configured to:
and if the sum of the number of the current user equipment in all the selected user sets is less than a preset threshold value and the third user equipment is integrated into an empty set, carrying out frame transmission on the current user equipment in all the selected user sets.
The QoS-based SLNR rule optimization multi-user communication device provided by the embodiment of the invention comprises the following steps of firstly, selecting the user equipment with the maximum SLNR from each user equipment set, and moving the selected user equipment with the maximum SLNR to the corresponding selected user set, so that the user equipment with higher SLNR in the user equipment is treated equally, and fairness is ensured; then, according to the sequence of the QoS grades of the user equipment sets from high to low, the user equipment sets are processed one by one, so that the user equipment with the high QoS grade is preferentially selected by the base station for data transmission. Whether the user equipment can be selected by the base station for data transmission or not is influenced by the SLNR (Signal to noise ratio) size factor and the QoS (quality of service) grade factor of the user equipment, so that the fairness is ensured, and the service quality of the user equipment with high QoS (quality of service) requirements can be improved.
An embodiment of the present invention further provides an electronic device, as shown in fig. 5, including a processor 301, a communication interface 302, a memory 303, and a communication bus 304, where the processor 301, the communication interface 302, and the memory 303 complete mutual communication through the communication bus 304,
a memory 303 for storing a computer program;
the processor 301, when executing the program stored in the memory 303, implements the following steps:
acquiring an alternative user equipment set, and determining SLNR information of each user equipment in the alternative user equipment set, wherein the alternative user equipment set comprises: a set of user equipments connected to the base station and waiting for communication;
determining the QoS grade of each user equipment in the alternative user equipment set according to the preset corresponding relation between the current service type of the user equipment and the QoS grade;
classifying user equipment with the same QoS grade aiming at the user equipment in the alternative user equipment sets to obtain a plurality of user equipment sets, wherein each user equipment set corresponds to one QoS grade;
establishing a plurality of selected user sets, wherein the selected user sets are as follows: the user equipment sets are selected by the base station and used for transmitting the current frame, and each selected user set corresponds to a user equipment set with the QoS level consistent with that of the selected user set;
selecting the user equipment with the largest SLNR from each user equipment set, and moving the selected user equipment with the largest SLNR to the corresponding selected user set;
according to the sequence of the QoS grade of each user equipment set from high to low, the following processing is carried out on each user equipment set one by one: moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all the user equipment are integrated into an empty set;
and carrying out frame transmission on the current user equipment in all the selected user sets.
The electronic device provided by the embodiment of the invention firstly selects the user equipment with the largest SLNR from each user equipment set, and moves the selected user equipment with the largest SLNR to the corresponding selected user set, so that the user equipment with higher SLNR in the user equipment is treated equally, and fairness is ensured; then, according to the sequence of the QoS grades of the user equipment sets from high to low, the user equipment sets are processed one by one, so that the user equipment with the high QoS grade is preferentially selected by the base station for data transmission. Whether the user equipment can be selected by the base station for data transmission or not is influenced by the SLNR (Signal to noise ratio) size factor and the QoS (quality of service) grade factor of the user equipment, so that the fairness is ensured, and the service quality of the user equipment with high QoS (quality of service) requirements can be improved.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program is stored, and is configured to execute the following steps:
acquiring an alternative user equipment set, and determining SLNR information of each user equipment in the alternative user equipment set, wherein the alternative user equipment set comprises: a set of user equipments connected to the base station and waiting for communication;
determining the QoS grade of each user equipment in the alternative user equipment set according to the preset corresponding relation between the current service type of the user equipment and the QoS grade;
classifying user equipment with the same QoS grade aiming at the user equipment in the alternative user equipment sets to obtain a plurality of user equipment sets, wherein each user equipment set corresponds to one QoS grade;
establishing a plurality of selected user sets, wherein the selected user sets are as follows: the user equipment sets are selected by the base station and used for transmitting the current frame, and each selected user set corresponds to a user equipment set with the QoS level consistent with that of the selected user set;
selecting the user equipment with the largest SLNR from each user equipment set, and moving the selected user equipment with the largest SLNR to the corresponding selected user set;
according to the sequence of the QoS grade of each user equipment set from high to low, the following processing is carried out on each user equipment set one by one: moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all the user equipment are integrated into an empty set;
and carrying out frame transmission on the current user equipment in all the selected user sets.
The computer-readable storage medium provided in the embodiment of the present invention first selects the ue with the largest SLNR from each ue set, and moves the selected ue with the largest SLNR to the corresponding selected ue set, so that ues with higher SLNR in the ues are treated equally, and fairness is ensured; then, according to the sequence of the QoS grades of the user equipment sets from high to low, the user equipment sets are processed one by one, so that the user equipment with the high QoS grade is preferentially selected by the base station for data transmission. Whether the user equipment can be selected by the base station for data transmission or not is influenced by the SLNR (Signal to noise ratio) size factor and the QoS (quality of service) grade factor of the user equipment, so that the fairness is ensured, and the service quality of the user equipment with high QoS (quality of service) requirements can be improved.
For the apparatus/electronic device/storage medium embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to part of the description of the method embodiment.
It should be noted that the apparatus, the electronic device, and the storage medium according to the embodiments of the present invention are respectively an apparatus, an electronic device, and a storage medium for optimizing a multi-user communication method by applying the QoS-based SLNR criterion, and all embodiments of the QoS-based SLNR criterion optimizing a multi-user communication method are applicable to the apparatus, the electronic device, and the storage medium, and can achieve the same or similar beneficial effects.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A signal-to-leakage-and-noise ratio (SLNR) criterion optimized multi-user communication method based on quality of service (QoS) is applied to a base station in a multi-user multiple-input multiple-output (MU-MIMO) communication system, and the method comprises the following steps:
acquiring an alternative user equipment set, and determining SLNR information of each user equipment in the alternative user equipment set, wherein the alternative user equipment set comprises: a set of user equipments connected to the base station and waiting for communication;
determining the QoS grade of each user equipment in the alternative user equipment set according to the preset corresponding relation between the current service type of the user equipment and the QoS grade;
classifying the user equipment with the same QoS grade aiming at the user equipment in the alternative user equipment set to obtain a plurality of user equipment sets, wherein each user equipment set corresponds to one QoS grade;
establishing a plurality of selected user sets according to the QoS grade of the user equipment, wherein the selected user sets are as follows: the user equipment sets are selected by the base station and used for transmitting the current frame, and each selected user set corresponds to one user equipment set with the QoS level consistent with that of the selected user set;
selecting the user equipment with the largest SLNR from each user equipment set, and moving the selected user equipment with the largest SLNR to the corresponding selected user set;
according to the sequence of the QoS grade of each user equipment set from high to low, the following processing is carried out on each user equipment set one by one: moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all the user equipment are integrated into an empty set;
and carrying out frame transmission on the current user equipment in all the selected user sets.
2. The method according to claim 1, wherein the step of determining the QoS class of each ue in the candidate ue set according to the preset correspondence between the current service type of the ue and the QoS class comprises:
when the current service type of the user equipment is data throughput limited service, determining the QoS grade of the user equipment as a first grade;
when the current service type of the user equipment is delay limited service, determining the QoS grade of the user equipment as a second grade;
when the current service type of the user equipment is unlimited service, determining that the QoS grade of the user equipment is a third grade; wherein the priorities of the first level, the second level and the third level are sequentially decreased.
3. The method of claim 1, wherein the step of classifying the ues having the same QoS class to obtain a plurality of ue sets comprises:
classifying user equipment with a first QoS (quality of service) grade to obtain a first user equipment set;
classifying the user equipment with the QoS grade of the second grade to obtain a second user equipment set;
and classifying the user equipment with the QoS grade of the third grade to obtain a third user equipment set.
4. The method of claim 3, wherein the step of establishing a plurality of selected user sets comprises:
establishing a first selected user set, a second selected user set and a third selected user set, wherein the QoS grade of the first selected user set is a first grade, the QoS grade of the second selected user set is a second grade, and the QoS grade of the third selected user set is a third grade.
5. The method of claim 4, wherein the step of moving the remaining ues in the ue set to the selected ue set corresponding to the ue set one by one in the sequence from high SLNR to low SLNR, and comparing the sum of the current number of ues in all the selected ue sets with a preset threshold after each movement comprises:
moving the rest user equipment in the first user equipment set to a first selected user set one by one according to the sequence of SLNR from high to low, and comparing the sum of the number of the current user equipment in all the selected user sets with the size of a preset threshold value after moving each time;
if the sum of the current user equipment number in all the selected user sets is smaller than a preset threshold value and the first user equipment is integrated into an empty set, moving the remaining user equipment in the second user equipment set to the second selected user set one by one according to the sequence from SLNR from high to low, and comparing the sum of the current user equipment number in all the selected user sets with the preset threshold value after moving each time;
and if the sum of the current user equipment number in all the selected user sets is smaller than a preset threshold value and the second user equipment is integrated into an empty set, moving the rest user equipment in the third user equipment set to the third selected user set one by one according to the sequence from SLNR (Signal to noise ratio) from high to low, and comparing the sum of the current user equipment number in all the selected user sets with the preset threshold value after each movement.
6. The method of claim 5, wherein the step of transmitting frames to the current ues in all the selected ues comprises:
and if the sum of the number of the current user equipment in all the selected user sets is less than a preset threshold value and the third user equipment is integrated into an empty set, carrying out frame transmission on the current user equipment in all the selected user sets.
7. An apparatus for optimizing multiuser communication based on signal-to-leakage-and-noise ratio (SLNR) criterion of quality of service (QoS), the apparatus being applied to a base station in a multiuser multiple-input multiple-output (MU-MIMO) communication system, the apparatus comprising:
an obtaining module, configured to obtain an alternative user equipment set, and determine SLNR information of each user equipment in the alternative user equipment set, where the alternative user equipment set is: a set of user equipments connected to the base station and waiting for communication;
a determining module, configured to determine, according to a preset correspondence between a current service type of the user equipment and a QoS class, a QoS class of each user equipment in the candidate user equipment set;
a classifying module, configured to classify, for the user equipments in the candidate user equipment sets, the user equipments having the same QoS class to obtain multiple user equipment sets, where each user equipment set corresponds to one QoS class;
a building module, configured to build a plurality of selected user sets according to the QoS class of the user equipment, where the selected user sets are: the user equipment sets are selected by the base station and used for transmitting the current frame, and each selected user set corresponds to one user equipment set with the QoS level consistent with that of the selected user set;
a selecting module, configured to select a ue with the largest SLNR from each ue set, and move the selected ue with the largest SLNR to the corresponding selected ue set;
a moving module, configured to perform the following processing on each user equipment set one by one according to a sequence from high QoS levels to low QoS levels of the user equipment sets: moving the remaining user equipment in the user equipment set to a selected user set corresponding to the user equipment set one by one according to the sequence from high SLNR to low SLNR, and comparing the sum of the number of the current user equipment in all the selected user sets with the preset threshold value after moving each time until the sum of the number of the current user equipment in all the selected user sets is equal to the preset threshold value; or until all the user equipment are integrated into an empty set;
and the transmission module is used for transmitting frames to the current user equipment in all the selected user sets.
8. The apparatus of claim 7, wherein the determining module comprises:
a first determining submodule, configured to determine, when the current service type of the user equipment is a data throughput limited service, that a QoS class of the user equipment is a first class;
a second determining submodule, configured to determine, when the current service type of the user equipment is a delay limited service, that the QoS class of the user equipment is a second class;
a third determining submodule, configured to determine, when the current service type of the user equipment is an unlimited service, that the QoS class of the user equipment is a third class; wherein the priorities of the first level, the second level and the third level are sequentially decreased.
9. An electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus;
the memory is used for storing a computer program;
the processor, when executing the program stored in the memory, is adapted to carry out the method steps of any of claims 1-6.
10. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of claims 1-6.
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