CN114071489A - Communication node pairing method and device, communication node and storage medium - Google Patents
Communication node pairing method and device, communication node and storage medium Download PDFInfo
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Abstract
The application discloses a communication node pairing method and device, a communication node and a storage medium. The method comprises the following steps: a first communication node acquires channel information of K second communication nodes; k is an integer greater than or equal to 2; according to the obtained channel information of the K second communication nodes, selecting the second communication nodes meeting preset conditions with the self positions from the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K; according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired; and pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
Description
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a communication node pairing method and apparatus, a communication node, and a storage medium.
Background
A multiple-Input multiple-Output (MIMO) technology is a key technology of a Long Term Evolution (LTE) system, and can greatly improve spectrum efficiency. However, the practical application of the multi-antenna reception of the terminal is difficult to satisfy due to the hardware condition of the terminal. To solve this problem, in the LTE system, Virtual MIMO technology (VMIMO) is proposed. VMIMO allows at least two users to pair, using the same video resources to transmit data, obtaining spatial multiplexing gain. Therefore, the user pairing technology is one of the key technologies of VMIMO, and a common user pairing method includes: random Pairing (RPS), Orthogonal Pairing (OPS), Proportional Fair (PF), and the like.
However, in the related art, the pairing scheme is complex, and requires pairing calculation for all users in the system, which brings extra time overhead when there are many system users; and there is a difficulty in handling the pairing of multiple users in the same direction.
Disclosure of Invention
In order to solve the related technical problem, embodiments of the present application provide a communication node pairing method, apparatus, communication node, and storage medium.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a communication node pairing method, which is applied to a first communication node and comprises the following steps:
acquiring channel information of K second communication nodes; n is an integer greater than or equal to 2;
according to the obtained channel information of the K second communication nodes, selecting the second communication nodes meeting preset conditions with the self positions from the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K;
according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired;
and pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
In the above scheme, when pairing Q communication nodes to be paired is performed by using the modalities and channel information of the Q communication nodes to be paired, the method includes:
selecting a communication node from the communication nodes to be paired, and determining an OPS channel between the selected communication node and at least one other communication node except the selected communication node in the communication nodes to be paired by using the mode and channel information of the communication nodes to be paired; determining a channel correlation matrix corresponding to the OPS channel;
pairing the selected communication node from the at least one other communication node to be paired by using a first element in the determined channel correlation matrix; the first element is an element capable of embodying a channel correlation between the selected communication node and a corresponding communication node.
In the above scheme, the pairing the selected communication node from the at least one other communication node to be paired by using the first element in the determined channel correlation matrix includes:
for each first element in the at least one first element corresponding to the at least one other communication node to be paired, taking an F norm for the corresponding first element to obtain at least one processing result;
and selecting the communication node corresponding to the minimum processing result in the at least one processing result as a pairing communication node of the selected communication node.
In the foregoing solution, when the minimum processing result is less than or equal to a preset threshold, the communication node corresponding to the minimum processing result and the communication node that is a pairing communication node of the selected communication node are used.
In the foregoing solution, when determining an OPS channel between the selected communication node and at least one to-be-paired communication node other than the selected communication node among the to-be-paired communication nodes, the method includes:
respectively performing Discrete Fourier Transform (DFT) precoding on the selected communication node and the initial channel of the corresponding communication node aiming at one communication node in the at least one other communication node to be paired to obtain an equivalent Orbital Angular Momentum (OAM) channel of the selected communication node and the corresponding communication node;
and determining the corresponding OPS channel by using the obtained equivalent OAM channel.
In the foregoing solution, the performing DFT precoding on the selected communication node and the initial channel of the corresponding communication node, respectively, to obtain an equivalent OAM channel of the selected communication node and the corresponding communication node includes:
respectively determining corresponding channel matrixes by using the selected communication nodes and the channel information of the corresponding communication nodes to obtain two channel matrixes;
respectively determining corresponding Discrete Fourier Transform (DFT) matrixes by using the selected communication nodes and the modes of the corresponding communication nodes to obtain two DFT matrixes;
and determining an equivalent OAM channel between the selected communication node and the corresponding communication node by using the two channel matrixes and the two DFT matrixes.
In the foregoing scheme, the allocating a modality to each communication node of the Q communication nodes to be paired according to the allocation policy includes one of:
a mode is distributed for each communication node in the Q communication nodes to be paired in a random distribution mode;
according to the sequence of the modes in the set, each communication node in the Q communication nodes to be paired is allocated with the mode;
according to the priority sequence of the communication nodes, allocating a mode for each communication node in the Q communication nodes to be paired;
each communication node in the Q communication nodes to be paired is pre-allocated with a mode, whether the pre-allocated mode is the optimal mode is judged according to the optimal strategy, and the pre-allocated mode is used as the mode of the corresponding communication node under the condition that the pre-allocated mode is the optimal mode.
In the above scheme, the method further comprises:
and informing the Q communication nodes to be paired of the allocated modes.
The embodiment of the present application further provides a communication node pairing apparatus, including:
an obtaining unit, configured to obtain channel information of K second communication nodes; k is an integer greater than or equal to 2;
the selecting unit is used for selecting a second communication node which meets a preset condition with the position of the first communication node from the K second communication nodes according to the acquired channel information of the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K;
the distribution unit is used for distributing a mode for each communication node in the Q communication nodes to be paired according to a distribution strategy;
and the pairing unit is used for pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
An embodiment of the present application further provides a communication node, including: a processor and a communication interface; wherein the processor is configured to:
acquiring channel information of K second communication nodes through the communication interface; k is an integer greater than or equal to 2;
according to the obtained channel information of the K second communication nodes, selecting the second communication nodes meeting preset conditions with the communication node positions from the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K;
according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired;
and pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
An embodiment of the present application further provides a communication node, including: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to perform the steps of any of the above methods when running the computer program.
An embodiment of the present application further provides a storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of any one of the above methods.
According to the communication node pairing method, the communication node pairing device, the communication nodes and the storage medium, a first communication node acquires channel information of K second communication nodes; k is an integer greater than or equal to 2; selecting a second communication node which meets a preset condition with the position of the second communication node from the plurality of second communication nodes according to the acquired channel information of the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K; according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired; the mode and the channel information of the Q communication nodes to be paired are utilized to pair the Q communication nodes to be paired, and the second communication nodes meeting the preset conditions with the self positions are selected from the plurality of second communication nodes, namely, the nodes meeting the pairing conditions are screened for pairing, all the nodes do not need to be paired, so that the time overhead is greatly reduced when the number of the system nodes is large. Meanwhile, according to the scheme of the embodiment of the application, the second communication nodes which meet the preset conditions with the first communication node are selected from the plurality of second communication nodes to be paired, so that the plurality of nodes in the same direction are paired.
Drawings
FIG. 1 is a schematic flow chart of user pairing in the related art;
FIG. 2 is a schematic diagram of an implementation of step 103 in FIG. 1;
fig. 3 is a flowchart illustrating a method for pairing communication nodes according to an embodiment of the present application;
fig. 4 is a schematic diagram of an OAM transmission system model according to an embodiment of the present application;
fig. 5 is a schematic diagram of an OAM transmission system for node pairing according to an embodiment of the present application;
fig. 6 is a schematic flowchart of a user pairing process based on OAM in an application embodiment of the present application;
fig. 7 is a schematic structural diagram of a communication node pairing apparatus according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a communication node according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples.
In the related art, the pairing scheme adopted is as follows:
assuming a MIMO uplink system, a base station has 2 antennas, and there are 2 single-antenna users in a cell, and assuming that they have been paired successfully, the channel matrix of the formed 2 × 2VMIMO system is as follows:
wherein H1And H2Each represents a channel matrix formed by 2 configured users and a base station, and the 2 paired user channels are independent from each other. The received signal vector at the base station at this time can be written as:
wherein x is1And x2Representing the transmitted signals of two paired users, and n represents white gaussian noise.
And selecting users with channels most conforming to the orthogonal characteristic for pairing by orthogonal pairing, and further transmitting user data through the same resource block. Through the system channel matrix H, the cross-correlation channel matrix F is obtained by calculation:
the orthogonality factor D for 2 users is derived from F:
wherein, tr (-) represents to trace the matrix F, D is used as a factor for measuring the orthogonality of the channel, and the larger the value of D, the better the orthogonality is. The user pairing procedure of the OPS using the above principle, as shown in fig. 1, includes the following steps:
step 101: a base station acquires channel information of all users in a system, and all users to be distributed form a queue;
step 102: the base station selects a user from the queue;
wherein the user may be selected using random selection, sequential selection, priority selection, etc.
Step 103: the base station determines the orthogonality factor D of the user and the other users in the queue;
step 104: the base station selects 2 users with the maximum orthogonal factor D as paired users, and deletes the 2 users from the queue;
step 105: judging whether all the users in the queue finish pairing, if not, continuing to execute the step 102, otherwise, executing the step 106;
step 106: and outputting a pairing result, and the base station performs pairing on the users according to the pairing result to finish the current outflow.
That is, when all the users are matched, the processing flow is ended.
As shown in fig. 2, the process of determining the orthogonality factor D between the user and the rest of the users in the queue includes:
step 1031: the base station constructs a channel matrix H of 2 users (the user and one of the other users in the queue);
specifically, the channel matrix H of 2 users obtained through step 1011And H2H is constructed by equation (1).
Step 1032: the base station calculates a cross-correlation matrix F according to the channel matrix H;
specifically, the cross-correlation matrix F is calculated by formula (3).
Step 1033: and the base station determines the orthogonality factor D of the 2 users according to the obtained cross-correlation matrix F.
Specifically, the orthogonality factor D of the 2 users is calculated by equation (4).
As can be seen from the above description, the above pairing scheme is complex, requires pairing calculation for all users in the system, and brings additional time overhead when there are many system users.
In addition, the above pairing scheme is a MIMO-based transmission scheme, and there is difficulty in pairing a plurality of users in the same direction.
On the other hand, in the past decades, the demand for mobile data rates has been increasing and the problem of shortage of spectrum resources has been emerging. Frequency Division Multiplexing (FDM), Time Division Multiplexing (TDM), Code Division Multiplexing (CDM) and other Multiplexing techniques are used to gradually improve the spectral efficiency, and how to further improve the spectral efficiency becomes the focus of attention in the academic community. Orbital Angular Momentum (OAM) is an inherent physical property of electromagnetic waves, and can continuously improve the spectrum utilization rate from another dimension of multiplexing. According to classical electromagnetic theory, electromagnetic radiation contains both Spin Angular Momentum (SAM) and orbital Angular Momentum. SAM represents left and right hand circular polarization of an electromagnetic wave, OAM represents the rotation of the energy of the electromagnetic wave in the direction of transmission, so an electromagnetic wave carrying OAM is also called a vortex electromagnetic wave.
OAM is that by adding a phase rotation factor to a normal electromagnetic wave, the phase wavefront will no longer be a planar structure but rotate around the beam propagation direction, i.e. a vortex electromagnetic wave, and the electromagnetic wave carrying OAM can be expressed by the following formula:
wherein, l represents the intrinsic value of orbital angular momentum, also called modal value, order; a (r) represents the amplitude of the electromagnetic wave, r represents the linear distance from the beam center;
is the azimuth angle. And FDM, TDM, CDM are similar, and the orbital angular momentum of electromagnetic wave provides another multiplexing dimension l, and the electromagnetic vortex waves with different eigenvalues l in the axial direction are orthogonal to each other, so the OAM vortex waves with different eigenvalues can be transmitted in parallel in the same bandwidth, and l can take any value theoretically, namely infinite multiplexing can be realized.
Based on this, an OAM may be used to transmit electromagnetic waves, and an antenna used may include: uniform Circular Array (UCA), helical phase plate, and helical parabolic antenna, among others.
In various embodiments of the present application, communication node pairing is performed based on electromagnetic wave OAM.
The communication node pairing method provided by the embodiment of the application is applied to a first communication node, and as shown in fig. 3, includes the following steps:
step 301: acquiring channel information of K second communication nodes; k is an integer greater than or equal to 2;
step 302: selecting second communication nodes meeting preset conditions with the self positions from the K second communication nodes according to the acquired channel information of the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K;
step 303: according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired;
step 304: and pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
In practical application, the first communication node may be a base station, and correspondingly, the second communication node may be a terminal. The first communication node may also be a relay node or a base station in a relay scenario, and correspondingly, the second communication node may be a relay node in a relay scenario.
In step 301, the Channel Information may also be referred to as Channel State Information (CSI), and in a scenario of the base station and the terminal, the CSI is the CSI used by the terminal to feed back downlink Channel quality to the gNB, so that the base station selects an appropriate Modulation and Coding Scheme (MCS) for downlink data transmission, and reduces a block error rate (BLER) for downlink data transmission. In practical application, the second communication node may send a reference signal to the first communication node, and the first communication node obtains channel information by receiving the reference signal, or obtains CSI by using a CSI measurement reporting method in the related art.
In a relay scenario, channel information may also be obtained in the manner described above.
It should be noted that: the embodiment of the present application does not limit the specific implementation process of acquiring the channel information.
In step 302, when actually applied, the condition that the first communication node location satisfies the preset condition may include one of the following:
OAM transmission characteristics (which may also be understood as OAM transmission conditions);
coaxial with the first communications node antenna;
co-directional with the first communication node;
aligned (receive and transmit aligned) with the first communication node.
As can be seen from the above description, the preset conditions are described from different angles.
And the first communication node judges whether the second communication node is coaxial with the antenna of the first communication node according to the methods of the strength of the received signal of the second communication node, the phase of the received signal of the second communication node and the like in the channel information. After the antennas are aligned coaxially, the total energy received by each antenna of the receiving end from the transmitting antenna should be equal, and the phases of the signals received by all receiving antennas of the receiving end should also be equal, however, in practical application, a certain error may exist, so that, for one second communication node, when the difference between the received signal strength corresponding to the alignment of the received signal strength with the axis and the difference between the received signal phase corresponding to the alignment of the received signal phase with the axis are within a certain range (which may be determined through experiments), the second communication node may be considered as being coaxial with the first communication node antenna.
FIG. 4 is a schematic diagram of an OAM transmission system model using UCA antennasAs shown in fig. 4, in the OAM transmission system model, the transmit-receive antenna arrays are co-axially parallel. The transmitting end (namely Tx) is provided with M antenna units, the receiving end (Rx) is provided with N antenna units, the M antenna units of the transmitting end are uniformly distributed on a ring with the radius of R, and the N antenna units of the receiving end are uniformly distributed on the ring with the radius of R. Assuming that the included angle of the transmitting antenna unit is theta, the included angle of the receiving antenna unit is theta
The angle of the m-th transmitting unit is thus thetamThe angle of the nth receiving unit is
Therefore, the selecting a second communication node coaxial with its antenna from the plurality of second communication nodes is: the centers of the antennas of the first communication node and the selected second communication node are located on a certain axis. Certainly, in actual application, when the distance between the axis where the center of the first communication node antenna is located and the axis where the center of the selected second communication node antenna is located is less than or equal to the preset distance (which may be set as required), it is considered that the centers of the first communication node antenna and the selected second communication node antenna are both located on one determined axis. The second communication node coaxial with the first communication node antenna may also be referred to as a second communication node co-directional with the first communication node.
The premise of transmitting OAM electromagnetic waves by using the UCA antenna is as follows: when a mode is transmitted, the transmit power at each antenna element must be equal. In addition, by adding a phase factor to each transmitting antenna unit, a spiral electromagnetic wave carrying OAM can be generated, and for this operation, in a conventional MIMO system, it can be realized by additionally performing a DFT matrix once.
In step 303, in practical applications, a plurality of modes may be assigned, including:
in the first mode, a mode is distributed for each communication node in Q communication nodes to be paired in a random distribution mode;
in the second mode, according to the sequence of the modes in the set, each communication node in the Q communication nodes to be paired is allocated with the mode; this approach may also be referred to as a pre-allocation approach,
in the third mode, according to the priority sequence of the communication nodes, a mode is allocated to each communication node in the Q communication nodes to be paired;
and in the fourth mode, a mode is pre-allocated to each communication node in the Q communication nodes to be paired, whether the pre-allocated mode is the optimal mode is judged according to the optimal strategy, and the pre-allocated mode is taken as the mode of the corresponding communication node under the condition that the pre-allocated mode is the optimal mode.
The first mode is a pre-allocation mode, that is, a random algorithm is adopted to allocate a mode to each communication node in the Q communication nodes to be paired from a mode set.
The second mode is a pre-allocation mode, all nodes can share a mode set, the mode set is typically { …, -3, -2, -1, 0, 1, 2, 3, … }, in practical application, in order to guarantee the transmission rate, the mode set can be appropriately in the range of-3 to +3, namely, the mode set is { -3, -2, -1, 0, 1, 2, 3}, and the first communication node can allocate a mode to each communication node in Q communication nodes to be paired in turn according to the order of the modes in the mode set { -3, -2, -1, 0, 1, 2, 3 }.
The third mode is a preallocation mode, that is, according to the priority of each second communication node detected in advance, the second communication node with the higher priority is allocated with the mode with the higher transmission rate. Wherein the higher the priority, the smaller the absolute value of the assigned modality.
For the fourth mode, the method may be obtained according to a traversal method or a special algorithm, for example, whether the assigned mode is the optimal mode may be determined according to the size of the system and the rate, and the mode corresponding to the highest system and rate is selected as the mode of the second communication node.
In practical application, after the modalities are allocated to the Q communication nodes to be paired, the modalities allocated to the corresponding communication nodes need to be notified, so as to perform information transmission.
Wherein the assigned modality may be notified to the corresponding communication node by means of transmitting a broadcast signal.
In order to analyze the node pairing, an OAM transmission system with two paired nodes as shown in fig. 5 is assumed. The circle centers of 2 receiving ends (Rx1 and Rx2) and one transmitting end (Tx) are all located on one axis, and the three planes are parallel. The sending end has M antenna element, and 2 receiving ends have N antenna element respectively. The transmitting end can transmit a plurality of modes simultaneously, wherein Rx1 and Rx2 respectively use respective mode sets L1And L2For transmission (when a modality is assigned, at least one modality may be assigned to the receiving end, and when a plurality of modalities are assigned, the plurality of modalities form a modality set), Rx1 and Rx2 are located at distances Z1 and Z2 from the transmitting end, respectively. In the upper right diagram of fig. 5, when the OAM wave transmitted by TX is a helicon wave and is allocated to two different modalities of Rx1 and Rx2, the left diagram represents the reception situation of the phase of the corresponding receiving end; the right graph shows the reception of field strength.
Suppose that the signals sent to 2 receivers are respectively
And
that is, the symbol vectors sent to 2 receivers are generally considered as vectors in complex space (complex space), and the dimensions are L1 × 1 and L2 × 1, respectively, then the OAM transmission system is:
wherein,
and
denotes Rx1 andthe received signal vector of Rx2 is,
and
channel matrices of Rx1 and Rx2, respectively, Z is white gaussian noise,
and
DFT precoding matrices, corresponding to Rx1 and Rx2, respectively, for generating OAM electromagnetic waves,
the construction of (a) is as follows:
wherein the elements
In
The upper right hand corner of "1" indicates that this is the modality used by Rx1, and the lower right hand corner of "i" (i.e. the lower right hand corner characters) indicates that Rx1 transmits using the ith modality in its modality set L1.
wherein the elements
In
The upper right corner "2" of (i) indicates that this is the modality used by Rx2, and the lower right corner "i" (i.e. the lower right corner characters) indicates that Rx2 transmits using the ith modality in its modality set L2.
Therefore, the equivalent OAM channel H after DFT precoding of the original channel is:
wherein HOAM,11Represents the OAM channel between Tx and Rx 1; hOAM,12Represents the original channel from Tx to Rx1 multiplied by the DFT used by Rx 2; hOAM,21Represents the original channel from Tx to Rx2 multiplied by the DFT used by Rx 1; hOAM,22Representing the OAM channel between Tx to x 2.
According to the obtained OAM equivalent channel, the OPS channels of the 2 receiving ends are constructed as follows:
calculating a channel correlation matrix F according to the OPS channel, if so, judging that the channel correlation matrix F exists;
wherein, F12And F21The channel-phase relation between Rx1 and Rx2 is embodied, so that the two parameters can be used as the basis for pairing.
When Rx1 uses modality l1 and Rx2 uses modality l2, F12Equal to:
wherein,
represents the channel from the nth antenna to the mth Tx antenna of Rx 1;
representing the channel from the nth antenna to the mth Tx antenna of Rx 2.
When Rx1 uses modality l1 and Rx2 uses modality l2, F21Equal to:
wherein,
and
is affected by distance, so F12And F21Is a matrix for Z1 and Z2.
To F12Taking the F norm, the following results are obtained:
||F12||F≤γth (14)
wherein when the threshold is less than a certain threshold set by the implementation, namely gammathThen, it is considered that 2 Rx located at the Z1 and Z2 positions can be paired.
Accordingly, if F is used21To F21Taking the F norm, the following results are obtained:
||F21||F≤λth (15)
wherein, when the threshold is less than a certain threshold which is set to realize, namely lambdathThen, it is considered that 2 Rx located at the Z1 and Z2 positions can be paired.
Wherein the threshold may be set according to the actual minimum rate requirement of the system.
And pairing the Q communication nodes to be paired based on the theory.
Based on this, in an embodiment, when pairing is performed between Q communication nodes to be paired by using the modalities and the channel information of the Q communication nodes to be paired, the method includes:
selecting one communication node from the Q communication nodes to be paired, and determining an OPS channel between the selected communication node and Q-1 communication nodes except the selected communication node in the Q communication nodes to be paired by using the mode and channel information of the Q communication nodes to be paired; determining a channel correlation matrix corresponding to the OPS channel;
pairing the selected communication node from the Q-1 communication nodes using the first element in the determined channel correlation matrix.
Wherein the first element is an element capable of reflecting channel correlation between the selected communication node and the corresponding communication node, specifically, an element in row 1 and column 2 or an element in row 2 and column 1 in the determined channel correlation matrix, that is, F in the above formula (11)12Or F21。
In an embodiment, when determining the OPS channel between the selected communication node and Q-1 to-be-paired communication nodes except the selected communication node, the method includes:
respectively performing DFT precoding on the selected communication node and the initial channel of the corresponding communication node aiming at one communication node in Q-1 communication nodes to be paired to obtain an equivalent OAM channel of the selected communication node and the corresponding communication node;
and determining the corresponding OPS channel by using the obtained equivalent OAM channel.
In an embodiment, the performing DFT precoding on the selected communication node and the initial channel of the corresponding communication node, respectively, to obtain an equivalent OAM channel of the selected communication node and the corresponding communication node includes:
respectively determining corresponding channel matrixes by using the selected communication nodes and the channel information of the corresponding communication nodes to obtain two channel matrixes;
respectively determining corresponding DFT matrixes by using the selected communication nodes and the modes of the corresponding communication nodes to obtain two DFT matrixes;
and determining an equivalent OAM channel between the selected communication node and the corresponding communication node by using the two channel matrixes and the two DFT matrixes.
Here, an equivalent OAM channel between the selected communication node and the corresponding communication node is calculated using the above equation (9); using equation (10) above, the corresponding OPS channel is determined.
In an embodiment, the pairing the selected communication node from Q-1 communication nodes to be paired by using a first element in the determined channel correlation matrix includes:
for each first element in the Q-1 first elements, taking F norm of the corresponding first element to obtain M-1 processing results;
and selecting the communication node corresponding to the minimum processing result in the Q-1 processing results as a pairing communication node of the selected communication node.
Here, in a case where the minimum processing result is less than or equal to a preset threshold, the communication node corresponding to the minimum processing result and a counterpart communication node as the selected communication node are paired.
That is, two nodes can be paired only if formula (13) or formula (14) is satisfied.
And pairing the communication node corresponding to the minimum processing result with a pairing communication node which is the selected communication node, namely, two communication nodes with lowest channel correlation.
In practical application, two communication nodes which are successfully paired are deleted from the Q communication nodes to be paired, and then the mode is utilized to pair other communication nodes which are not paired.
Based on the above, in an embodiment, when pairing is performed between Q communication nodes to be paired by using the modalities and channel information of the Q communication nodes to be paired,
selecting a communication node from the communication nodes to be paired, and determining an OPS channel between the selected communication node and at least one other communication node except the selected communication node in the communication nodes to be paired by using the mode and channel information of the communication nodes to be paired; determining a channel correlation matrix corresponding to the OPS channel;
pairing the selected communication node from the at least one other communication node to be paired by using a first element in the determined channel correlation matrix; the first element is an element capable of embodying a channel correlation between the selected communication node and a corresponding communication node.
In practical application, when Q is an odd number, the remaining 1 second communication nodes are not paired.
Of course, in practical applications, Q needs to be greater than or equal to 2, so as to be able to implement the scheme of the embodiment of the present application.
In an embodiment, the pairing the selected communication node from the other plurality of communication nodes to be paired by using the first element in the determined channel correlation matrix includes:
for each first element in the at least one first element corresponding to the at least one other communication node to be paired, taking an F norm for the corresponding first element to obtain at least one processing result;
and selecting the communication node corresponding to the minimum processing result in the at least one processing result as a pairing communication node of the selected communication node.
Here, in a case where the minimum processing result is less than or equal to a preset threshold, the communication node corresponding to the minimum processing result and a counterpart communication node as the selected communication node are paired.
In an embodiment, when determining an OPS channel between the selected communication node and at least one other to-be-paired communication node except the selected communication node, the method may include:
performing DFT precoding on the selected communication node and the initial channel of the corresponding communication node respectively aiming at one communication node in the at least one other communication node to be paired to obtain an equivalent OAM channel of the selected communication node and the corresponding communication node;
and determining the corresponding OPS channel by using the obtained equivalent OAM channel.
After step 304 is completed, a node pairing result is obtained, which can also be understood as obtaining a node pairing situation.
According to the communication node pairing method provided by the embodiment of the application, a first communication node acquires channel information of K second communication nodes; k is an integer greater than or equal to 2; selecting a second communication node which meets a preset condition with the position of the second communication node from the plurality of second communication nodes according to the acquired channel information of the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K; according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired; the mode and channel information of the Q communication nodes to be paired are utilized to pair the Q communication nodes to be paired, and the second communication nodes meeting the preset conditions with the first communication node are selected from the plurality of second communication nodes, namely, the nodes meeting the pairing conditions are screened to be paired, all nodes of the system do not need to be paired, so that the time overhead is greatly reduced when the number of the system nodes is large. Meanwhile, according to the scheme of the embodiment of the application, the second communication nodes which meet the preset conditions with the first communication node are selected from the plurality of second communication nodes to be paired, so that the plurality of nodes in the same direction are paired.
The present application will be described in further detail with reference to the following application examples.
In the present embodiment, the transmitting end is referred to as Tx, the receiving end is referred to as Rx, and the transmitting end may also be referred to as a user.
Assuming Tx as a base station and Rx as a terminal, as shown in fig. 6, the process of OAM-based user pairing includes:
step 601: the Tx acquires channel information of all Rx in the system;
here, the system means: tx and all Rx in its coverage area.
The Tx transmits an uplink reference signal, and acquires channel state information by receiving the uplink reference signal.
The Tx may also use the CSI measurement reporting method in the 5G NR to obtain the channel information.
It should be noted that: the application embodiment of the present application does not limit the process of acquiring channel information.
Step 602: the Tx screens out coaxial Rx according to the obtained channel information of the plurality of Rx;
specifically, whether Rx is coaxial with the Tx antenna may be determined using the Tx receive signal strength, the Tx receive signal phase, and the like in the channel information.
Here, in practical applications, Rx with a Tx received signal strength difference and a transmitting end received signal phase difference within a certain range may be considered to be coaxial with Tx.
In this step, Tx identifies users in the same direction, and forms an Rx set to be paired.
Step 603: the Tx forms a Rx set to be paired with the screened Rx, and forms another set with their channel information, and then performs step 604;
here, it is assumed that the Rx set to be paired is formed as R ═ R1,...RK}; the channel information constitutes another set H ═ H1,...HK}。
Step 604: the Tx completes the distribution of modalities according to the Tx sets to be paired and their channel information sets, and then executes step 605;
the modality allocation can adopt a fixed pre-allocation method and an optimal modality allocation method. The pre-distribution method comprises the following steps: random assignment, assignment in order of modalities in the set, user priority assignment. Here, the user priority assignment means that a modality with a higher transmission rate is assigned to a user with a high priority according to a previously detected receiving end priority.
The optimal mode assignment method is as follows: and judging whether the pre-allocated mode is the optimal mode according to the optimal strategy, and taking the pre-allocated mode as the mode of the corresponding communication node under the condition that the pre-allocated mode is the optimal mode. Wherein, the optimal modality allocation is carried out by a traversal method.
The optimal modality can be determined by means of the pairing method of the embodiment of the present application.
Specifically, Tx needs to use the modality allocation method of allocation in set order first: the set of modalities used by all Rx is predetermined, the system and rate at this time are recorded after step 612 is completed, and then the modalities used by Rx are modified, i.e. step 604 is re-executed.
And after all the modal combinations are traversed, the modal allocation mode with the highest system and speed is the optimal modal allocation.
Step 605: after the Tx distributes the mode according to the determined mode distribution method, calculating an equivalent OAM channel according to the formula (7), the formula (8) and the formula (9);
step 606: tx transmit broadcast signals the Rx modality assignment result;
here, in actual application, step 605 and step 606 are not in sequence in execution order, that is, step 605 may be executed first and then step 606 is executed, or step 606 may be executed first and then step 605 is executed.
After the above operations are completed, the Tx can determine the Rx pairing situation according to the modal allocation result and the channel information.
Here, when the optimal modality is determined by the method of pairing according to the present embodiment, in step 606, Tx informs Rx of an optimal modality allocation result, that is, in the process of traversing modality combination, Tx does not inform Rx of a modality allocation result, that is, in the process of traversing modality combination, step 606 is not executed.
Step 607: tx selects any Rx in Rx set R to be paired, and is recorded as Ri；
Step 608: tx calculates K-1 OPS channels between the Rx and other Rx according to equation (10);
step 609: tx determines R according to equations (11), (12) and (14)iPairing cases with other Rx;
here, it is determined whether equation (14) is satisfied, and Rx that is satisfied can be paired.
γthIt may be set according to the actual minimum rate requirements of the system.
Tx also determines R according to equations (11), (13) and (15)iAnd itThe pairing of his Rx; wherein, whether the formula (15) is satisfied or not is judged, and the satisfied Rx can be paired.
λthIt may be set according to the actual minimum rate requirements of the system.
Step 610: tx selects, | | F satisfying equation (14) from all the pairing cases12||FPairing the smallest 2 Rx (i.e. the 2 Rx with the lowest correlation);
here, when Tx is also judged to be R according to the formulas (11), (13) and (15)iIn the case of pairing with other Rx, the selection satisfies the formula (15) and | | | F21||FThe smallest 2 Rx's are paired (i.e., the lowest correlation 2 Rx).
Step 611: remove these 2 Rx from the set R, output a pair of matches, then go to step 612;
step 612: judging whether all Rx are matched, if so, executing step 613, otherwise, executing step 607;
here, since it is necessary to satisfy the formula (14) or the formula (15) at the time of pairing, in actual application, there is a case where some Rx in the set R cannot be paired, and in this case, it is considered that pairing is completed for all Tx.
Step 613: judging whether the distributed modality is the optimal modality distribution, if so, executing step 614, otherwise, executing step 604;
here, when it is determined that the assigned modality is not the optimal modality, then the used modality is assigned to Rx again, that is, returning to step 604, and after all the modality combinations are traversed, outputting the Rx pairing condition under the optimal modality assignment. The system and rate corresponding to each assigned modality need to be recorded (a sum rate formula may be used to determine the system and rate corresponding to each assigned modality, which is not limited in the embodiments of the present application).
Here, when the optimal mode allocation is not adopted, step 613 is not performed, and step 614 is directly performed after all Rx pairs are completed;
step 614: the current processing flow is ended.
As can be seen from the above description, the scheme of the embodiment of the present application utilizes the characteristic of OAM modal multiplexing, overcomes the disadvantage that users in the same direction are difficult to pair in the related art, and reduces the complexity of pairing.
In addition, an optimal mode distribution mode can be adopted, so that a better user pairing effect can be realized, and the system performance is improved.
In order to implement the method of the embodiment of the present application, an embodiment of the present application further provides a communication node pairing apparatus, which is disposed on a first communication node, and as shown in fig. 7, the apparatus includes:
an obtaining unit 701, configured to obtain channel information of K second communication nodes; k is an integer greater than or equal to 2;
a selecting unit 702, configured to select, according to the obtained channel information of the K second communication nodes, a second communication node whose position meets a preset condition with a first communication node from the K second communication nodes, so as to obtain Q communication nodes to be paired; q is an integer less than K;
the allocating unit 703 is configured to allocate a modality to each communication node of the Q communication nodes to be paired according to an allocation policy;
the pairing unit 704 pairs the Q communication nodes to be paired by using the modalities and the channel information of the Q communication nodes to be paired.
In an embodiment, the allocating unit 703 is specifically configured to perform one of the following operations:
a mode is distributed for each communication node in the Q communication nodes to be paired in a random distribution mode;
according to the sequence of the modes in the set, each communication node in the Q communication nodes to be paired is allocated with the mode;
according to the priority sequence of the communication nodes, allocating a mode for each communication node in the Q communication nodes to be paired;
each communication node in the Q communication nodes to be paired is pre-allocated with a mode, whether the pre-allocated mode is the optimal mode is judged according to the optimal strategy, and the pre-allocated mode is used as the mode of the corresponding communication node under the condition that the pre-allocated mode is the optimal mode.
In an embodiment, the pairing unit 704 is specifically configured to:
selecting one communication node from the communication nodes to be paired when the Q communication nodes to be paired are paired by using the mode and channel information of the Q communication nodes to be paired, and determining an OPS channel between the selected communication node and at least one other communication node except the selected communication node in the communication nodes to be paired by using the mode and channel information of a plurality of communication nodes to be paired; determining a channel correlation matrix corresponding to the OPS channel;
pairing the selected communication node from the at least one other communication node to be paired by using a first element in the determined channel correlation matrix; the first element is an element capable of embodying a channel correlation between the selected communication node and a corresponding communication node.
In an embodiment, the pairing unit 704 is specifically configured to:
for each first element in the at least one first element corresponding to the at least one other communication node to be paired, taking an F norm for the corresponding first element to obtain at least one processing result;
and selecting the communication node corresponding to the minimum processing result in the plurality of processing results as a pairing communication node of the selected communication node.
In an embodiment, the pairing unit 704 is specifically configured to:
and if the minimum processing result is less than or equal to a preset threshold, a communication node corresponding to the minimum processing result and a pairing communication node as the communication node selected by the selecting and pairing unit 704 are paired.
In an embodiment, the pairing unit 704 is specifically configured to:
performing DFT precoding on the selected communication node and the initial channel of the corresponding communication node respectively aiming at one communication node in the at least one other communication node to be paired to obtain an equivalent OAM channel of the selected communication node and the corresponding communication node;
and determining the corresponding OPS channel by using the obtained equivalent OAM channel.
In an embodiment, the pairing unit 704 is specifically configured to:
respectively determining corresponding channel matrixes by using the selected communication nodes and the channel information of the corresponding communication nodes to obtain two channel matrixes;
respectively determining corresponding Discrete Fourier Transform (DFT) matrixes by using the selected communication nodes and the modes of the corresponding communication nodes to obtain two DFT matrixes;
and determining an equivalent OAM channel between the selected communication node and the corresponding communication node by using the two channel matrixes and the two DFT matrixes.
In an embodiment, the apparatus may further include:
and the notification unit is used for notifying the Q distributed modes of the communication nodes to be paired.
In practical application, the obtaining unit 701 may be implemented by a processor in the communication node pairing apparatus in combination with a communication interface; the selecting unit 702, the allocating unit 703 and the pairing unit 704 may be implemented by a processor in a communication node pairing apparatus; the notification unit may be implemented by a communication interface in the communication node pairing apparatus.
It should be noted that: the communication node pairing apparatus provided in the above embodiment is only illustrated by the division of the above program modules when the communication nodes are paired, and in practical applications, the above processing allocation may be completed by different program modules according to needs, that is, the internal structure of the apparatus is divided into different program modules to complete all or part of the above-described processing. In addition, the communication node pairing device and the communication node pairing method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.
Based on the hardware implementation of the program module, and in order to implement the method according to the embodiment of the present application, an embodiment of the present application further provides a communication node, as shown in fig. 8, where the communication node 800 includes:
a communication interface 801 capable of performing information interaction with a second communication node;
and the processor 802 is connected with the communication interface 801 to implement information interaction with the second communication node, and is configured to execute the method provided by one or more of the above technical solutions when running a computer program. And the computer program is stored on the memory 803.
In particular, the processor 802 is configured to:
acquiring channel information of K second communication nodes through the communication interface; k is an integer greater than or equal to 2;
selecting a second communication node which meets a preset condition with the position of the communication node from the K second communication nodes according to the acquired channel information of the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K;
according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired;
and pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
In an embodiment, the processor 802 is specifically configured to perform one of the following operations:
a mode is distributed for each communication node in the Q communication nodes to be paired in a random distribution mode;
according to the sequence of the modes in the set, each communication node in the Q communication nodes to be paired is allocated with the mode;
according to the priority sequence of the communication nodes, allocating a mode for each communication node in the Q communication nodes to be paired;
each communication node in the Q communication nodes to be paired is pre-allocated with a mode, whether the pre-allocated mode is the optimal mode is judged according to the optimal strategy, and the pre-allocated mode is used as the mode of the corresponding communication node under the condition that the pre-allocated mode is the optimal mode.
In an embodiment, the processor 802 is specifically configured to:
selecting one communication node from the communication nodes to be paired when the Q communication nodes to be paired are paired by using the mode and channel information of the Q communication nodes to be paired, and determining an OPS channel between the selected communication node and at least one other communication node except the selected communication node in the plurality of communication nodes to be paired by using the mode and channel information of the plurality of communication nodes to be paired; determining a channel correlation matrix corresponding to the OPS channel;
pairing the selected communication node from the at least one other communication node to be paired by using a first element in the determined channel correlation matrix; the first element is an element capable of embodying a channel correlation between the selected communication node and a corresponding communication node.
In an embodiment, the processor 802 is specifically configured to:
for each first element in the at least one first element corresponding to the at least one other communication node to be paired, taking an F norm for the corresponding first element to obtain a plurality of processing results;
and selecting the communication node corresponding to the minimum processing result in the plurality of processing results as a pairing communication node of the selected communication node.
In an embodiment, the processor 802 is specifically configured to:
and under the condition that the minimum processing result is less than or equal to a preset threshold, the communication node corresponding to the minimum processing result and a pairing communication node which is the selected communication node are used.
In an embodiment, the processor 802 is specifically configured to:
performing DFT precoding on the selected communication node and the initial channel of the corresponding communication node respectively aiming at one communication node in the at least one other communication node to be paired to obtain an equivalent OAM channel of the selected communication node and the corresponding communication node;
and determining the corresponding OPS channel by using the obtained equivalent OAM channel.
In an embodiment, the processor 802 is specifically configured to:
respectively determining corresponding channel matrixes by using the selected communication nodes and the channel information of the corresponding communication nodes to obtain two channel matrixes;
respectively determining corresponding Discrete Fourier Transform (DFT) matrixes by using the selected communication nodes and the modes of the corresponding communication nodes to obtain two DFT matrixes;
and determining an equivalent OAM channel between the selected communication node and the corresponding communication node by using the two channel matrixes and the two DFT matrixes.
In an embodiment, the communication interface 801 is configured to notify the Q communication nodes to be paired of the assigned modalities.
It should be noted that: the specific processing of the processor 802 and the communication interface 801 may be understood with reference to the methods described above.
Of course, in practice, the various components in the communication node 800 are coupled together by a bus system 804. It is understood that the bus system 804 is used to enable communications among the components. The bus system 804 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 804 in FIG. 8.
The memory 803 in embodiments of the present application is used to store various types of data to support the operation of the communication node 800. Examples of such data include: any computer program for operation on the communication node 800.
The method disclosed in the embodiments of the present application may be applied to the processor 802, or implemented by the processor 802. The processor 802 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 802. The Processor 802 described above may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 802 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 803, and the processor 802 reads the information in the memory 803 and performs the steps of the aforementioned methods in conjunction with its hardware.
In an exemplary embodiment, the communication node 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.
It is to be appreciated that the memory 803 of the subject embodiment can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memories described in the embodiments of the present application are intended to comprise, without being limited to, these and any other suitable types of memory.
In an exemplary embodiment, the present application further provides a storage medium, i.e. a computer storage medium, in particular a computer readable storage medium, for example comprising a memory 803 storing a computer program, which is executable by a processor 802 of the communication node 800 to perform the steps of the aforementioned method. The computer readable storage medium may be Memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disk, or CD-ROM.
It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The technical means described in the embodiments of the present application may be arbitrarily combined without conflict.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.
Claims (12)
1. A communication node pairing method applied to a first communication node comprises the following steps:
acquiring channel information of K second communication nodes; k is an integer greater than or equal to 2;
according to the obtained channel information of the N second communication nodes, selecting the second communication nodes meeting preset conditions with the self positions from the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K;
according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired;
and pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
2. The method according to claim 1, wherein when pairing is performed between Q communication nodes to be paired by using the modalities and channel information of the Q communication nodes to be paired, the method comprises:
selecting a communication node from the communication nodes to be paired, and determining an orthogonal pairing algorithm (OPS) channel between the selected communication node and at least one other communication node except the selected communication node in the communication nodes to be paired by using the mode and channel information of the communication nodes to be paired; determining a channel correlation matrix corresponding to the OPS channel;
pairing the selected communication node from the at least one other communication node to be paired by using a first element in the determined channel correlation matrix; the first element is an element capable of embodying a channel correlation between the selected communication node and a corresponding communication node.
3. The method according to claim 2, wherein said pairing the selected communication node from the at least one other communication node to be paired by using the first element in the determined channel correlation matrix comprises:
for each first element in the at least one first element corresponding to the at least one other communication node to be paired, taking an F norm for the corresponding first element to obtain at least one processing result;
and selecting the communication node corresponding to the minimum processing result in the at least one processing result as a pairing communication node of the selected communication node.
4. The method according to claim 3, wherein if the minimum processing result is less than or equal to a preset threshold, the communication node corresponding to the minimum processing result is paired with the selected communication node.
5. The method according to claim 2, wherein when determining the OPS channel between the selected communication node and at least one other communication node to be paired except the selected communication node, the method comprises:
for one communication node of the at least one other communication node to be paired, performing Discrete Fourier Transform (DFT) precoding on the selected communication node and the initial channel of the corresponding communication node respectively to obtain an equivalent Orbital Angular Momentum (OAM) channel of the selected communication node and the corresponding communication node;
and determining the corresponding OPS channel by using the obtained equivalent OAM channel.
6. The method according to claim 5, wherein the performing DFT precoding on the initial channels of the selected communication node and the corresponding communication node to obtain equivalent OAM channels of the selected communication node and the corresponding communication node respectively comprises:
respectively determining corresponding channel matrixes by using the selected communication nodes and the channel information of the corresponding communication nodes to obtain two channel matrixes;
respectively determining corresponding Discrete Fourier Transform (DFT) matrixes by using the selected communication nodes and the modes of the corresponding communication nodes to obtain two DFT matrixes;
and determining an equivalent OAM channel between the selected communication node and the corresponding communication node by using the two channel matrixes and the two DFT matrixes.
7. The method according to any one of claims 1 to 6, wherein the assigning a modality to each of the Q communication nodes to be paired according to an assignment policy includes one of:
a mode is distributed for each communication node in the Q communication nodes to be paired in a random distribution mode;
according to the sequence of the modes in the set, each communication node in the Q communication nodes to be paired is allocated with the mode;
according to the priority sequence of the communication nodes, allocating a mode for each communication node in the Q communication nodes to be paired;
each communication node in the Q communication nodes to be paired is pre-allocated with a mode, whether the pre-allocated mode is the optimal mode is judged according to the optimal strategy, and the pre-allocated mode is used as the mode of the corresponding communication node under the condition that the pre-allocated mode is the optimal mode.
8. The method according to any one of claims 1 to 6, further comprising:
and informing the Q communication nodes to be paired of the allocated modes.
9. A communication node pairing apparatus, comprising:
an obtaining unit, configured to obtain channel information of K second communication nodes; n is an integer greater than or equal to 2;
the selecting unit is used for selecting a second communication node which meets a preset condition with the position of the first communication node from the K second communication nodes according to the acquired channel information of the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K;
the distribution unit is used for distributing a mode for each communication node in the Q communication nodes to be paired according to a distribution strategy;
and the pairing unit is used for pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
10. A communications node, comprising: a processor and a communication interface; wherein the processor is configured to:
acquiring channel information of K second communication nodes through the communication interface; n is an integer greater than or equal to 2;
according to the obtained channel information of the K second communication nodes, selecting the second communication nodes meeting preset conditions with the communication node positions from the K second communication nodes to obtain Q communication nodes to be paired; q is an integer less than K;
according to an allocation strategy, allocating a mode for each communication node in the Q communication nodes to be paired;
and pairing the Q communication nodes to be paired by using the modes and the channel information of the Q communication nodes to be paired.
11. A communications node, comprising: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any one of claims 1 to 8 when running the computer program.
12. A storage medium having a computer program stored thereon, the computer program, when being executed by a processor, performing the steps of the method of any one of claims 1 to 8.
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| CN116054891B (en) * | 2023-02-13 | 2024-08-16 | 中国联合网络通信集团有限公司 | MU-MIMO user pairing method and device for multi-input multi-output system |
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