CN113056021A - User transmission mode switching method, electronic device and storage medium - Google Patents

User transmission mode switching method, electronic device and storage medium Download PDF

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Publication number
CN113056021A
CN113056021A CN201911370631.1A CN201911370631A CN113056021A CN 113056021 A CN113056021 A CN 113056021A CN 201911370631 A CN201911370631 A CN 201911370631A CN 113056021 A CN113056021 A CN 113056021A
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users
mode
target
user
switching
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程明泉
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2020/138360 priority patent/WO2021129618A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

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Abstract

The embodiment of the invention provides a user transmission mode switching method. Wherein, the method comprises the following steps: determining alternative users from the users of the cell according to the load condition of the cell; selecting N users from the alternative users as target users, wherein N is a positive integer greater than or equal to 1; and switching the mode of the target user. By the user transmission mode switching method provided by the embodiment of the invention, the base station can dynamically and adaptively adjust the transmission mode of the user according to different load conditions of the cell, and the problem of low user service transmission efficiency in the related technology is solved.

Description

User transmission mode switching method, electronic device and storage medium
Technical Field
The present invention relates to the field of communications, and in particular, to a method for switching a user transmission mode, an electronic device, and a storage medium.
Background
In the Long Term Evolution (LTE) protocol, 10 transmission modes are defined, which are TM1 to TM 10. When allocating transmission modes to users in a cell, cell load is usually not considered, and generally, a suitable transmission mode is determined according to a single user spectrum efficiency maximization idea, or a better mode selection method is selected by comparing a fixed Beamforming (BF) transmission mode with a non-BF transmission mode in a high-load scene. When the method is used for distributing the transmission mode for the cell users, the cell load is not considered, and the method is not favorable for the service transmission of the cell users.
Disclosure of Invention
The embodiment of the invention provides a user transmission mode switching method, a base station can dynamically and adaptively adjust the transmission mode of a user according to different load states of a cell, and the problem of low service transmission efficiency caused by the fact that the cell load is not considered when the transmission mode is distributed to a cell user in the related art is solved.
According to an embodiment of the present invention, there is provided a user transmission mode switching method, including:
determining alternative users from users of a cell according to the load condition of the cell;
selecting N users from the alternative users as target users, wherein N is a positive integer greater than or equal to 1;
and switching modes of the target user.
Optionally, the determining, according to the load condition of the cell, an alternative user from the users of the cell includes:
judging whether the current load of the cell exceeds a first threshold value;
and under the condition that the judgment result is yes, selecting a plurality of users with the service loads exceeding a second threshold value from the users of the cell as the alternative users.
Optionally, the selecting N users from the candidate users as target users includes:
for any user in the alternative users, determining a correlation value between the any user and other users except the any user in the alternative users;
determining the number K of correlation values smaller than a third threshold value in the plurality of correlation values corresponding to any user, wherein K is an integer greater than or equal to 0;
taking the users with the number K larger than a fourth threshold value in the alternative users as the preparation users;
and determining N users as the target users according to the number of the prepared users and the number of the transmitting antennas of the base station corresponding to the cell.
Optionally, the performing mode switching on the target user includes: and switching modes of the target user according to the spectrum efficiency of the target user.
Optionally, the performing mode switching on the target user according to the spectrum efficiency of the target user includes:
judging whether the number N of the target users is larger than a fifth threshold value L, wherein the fifth threshold value L is determined according to the sum of the maximum number of users which can be supported by the TM8 mode and the TM9 mode;
determining the number M of users with spectral efficiency larger than a sixth threshold in the target users under the condition that N > L, wherein the sixth threshold is determined according to a spectral efficiency peak value corresponding to a TM3 mode, and M is an integer larger than or equal to 0;
judging whether the number M of the users is greater than a fifth threshold value L;
and in the case that M > L, switching L users with the maximum spectral efficiency in the target users to the TM9 mode, and switching N-L users except the L users in the target users to the TM7 mode.
Optionally, after determining whether the number of users M is greater than the fifth threshold L, the method further includes:
and when M is less than or equal to L, switching M users with the maximum spectral efficiency in the target users to the TM9 mode, switching L-M users with the maximum spectral efficiency except the M users in the target users to the TM8 mode, and switching N-L users except the L users in the target users to the TM7 mode.
Optionally, after determining whether the number N of the target users is greater than a fifth threshold L, the method further includes:
determining the number M 'of users with the spectral efficiency larger than the sixth threshold value in the target user under the condition that N is smaller than or equal to L, wherein M' is an integer larger than or equal to 0;
switching M ' users with the largest spectral efficiency among the target users to the TM9 mode, and switching N-M ' users except the M ' users among the target users to the TM8 mode.
Optionally, the selecting, from the users in the cell, a plurality of users whose service loads exceed a second threshold as the candidate users includes:
and selecting a plurality of users with the service loads exceeding a second threshold value and the channel quality condition larger than a seventh threshold value from the users of the cell as the alternative users.
According to another embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory and a processor, the memory having a computer program stored therein, the processor being configured to perform the steps of any of the above method embodiments by the computer program.
The user transmission mode switching method provided by the embodiment of the invention can dynamically and adaptively adjust the transmission mode of the user according to different load states of the cell, thereby solving the problem of low cell service transmission efficiency in the related technology.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a user transmission mode switching method according to embodiment 1 of the present invention;
fig. 2 is a block diagram of a user transmission mode switching apparatus according to embodiment 2 of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
An embodiment 1 of the present invention provides a user transmission mode switching method, and fig. 1 is a flowchart of a user transmission mode switching method according to embodiment 1 of the present invention, as shown in fig. 1, the flowchart includes the following steps:
step S102: determining alternative users from the users of the cell according to the load condition of the cell;
step S104: selecting N users from the alternative users as target users, wherein N is a positive integer greater than or equal to 1;
step S106: and switching the mode of the target user.
By the method of the embodiment 1 of the present invention, for a cell with a high load, a service mode of a user in the cell suitable for space division multiplexing is switched to a BF mode, and other users continue to perform service transmission according to a current transmission mode, so that the overall service transmission efficiency of the cell is improved while ensuring the throughput of the user.
Optionally, determining an alternative user from the users in the cell according to the load condition of the cell includes: judging whether the current load of the cell exceeds a first threshold value; and if so, selecting a plurality of users with the service loads exceeding a second threshold value from the users in the cell as the alternative users.
It should be noted that the first threshold and the second threshold may be set empirically, and there is no necessary relationship between the two. When the cell load exceeds a first threshold value, the cell is considered as a high-load cell; when the traffic load of the user in the cell exceeds the second threshold, the user is considered to be mostly suitable for space division, and can be used as an alternative user to be switched in the mode.
Optionally, the first threshold may be set according to a Physical Resource Block (PRB) utilization rate and the number of active users in the cell. In the commercial network, the traffic of general commercial users is not too large, usually, a plurality of users act together, so that the PRB utilization rate is large, the PRB utilization rate is high, the number of active users is also large, and whether the cell is high-load or not is judged to generally see the PRB utilization rate and the number of active users in the cell.
Optionally, the second threshold may be set according to a Buffer Status Report (BSR), where the BSR may be used to reflect the size of the traffic of the user, and the larger the value, the larger the traffic required by the user at this time is.
Optionally, the selecting N users from the candidate users as target users includes: for any user in the alternative users, determining a correlation value between the any user and other users except the any user in the alternative users; determining the number K of correlation values smaller than a third threshold value in a plurality of correlation values corresponding to any user, wherein K is an integer greater than or equal to 0; taking the users with the number K larger than a fourth threshold value in the alternative users as the prepared users; and determining N users as the target users according to the number of the reserved users and the number of the transmitting antennas of the base station corresponding to the cell.
It should be noted that the third threshold and the fourth threshold may be set empirically, and there is no necessary relationship between the two. When selecting the user suitable for mode switching, the characteristic of small space division interference of the user with low correlation can be utilized to perform cluster switching on the user with low channel correlation, so that the prepared user is further determined from the alternative users. Optionally, if it is determined that existing users in the prepared users are in the BF mode, the users continue to perform data transmission according to the current BF mode.
It is generally considered that the number of users that can be accommodated by the base station and are in the same time-frequency resource for space division does not exceed the number of transmitting antennas. Therefore, the number of target users can be determined according to the number of the prepared users and the number of the transmitting antennas of the base station corresponding to the cell. Optionally, if the number of target users determined jointly according to the number of the reserved users and the number of the transmitting antennas of the base station corresponding to the cell is too small, the mode switching is not performed on the target users.
Optionally, the mode switching for the target user includes: and switching the mode of the target user according to the spectrum efficiency of the target user.
Optionally, the performing mode switching on the target user according to the spectrum efficiency of the target user includes: judging whether the number N of the target users is greater than a fifth threshold value L, wherein the fifth threshold value L is determined according to the sum of the maximum number of users which can be supported by the TM8 mode and the TM9 mode; determining the number M of users with spectral efficiency larger than a sixth threshold in the target users under the condition that N > L, wherein the sixth threshold is determined according to a spectral efficiency peak value corresponding to a TM3 mode, and M is an integer larger than or equal to 0; judging whether the number M of the users is larger than the fifth threshold value L; and under the condition that M is greater than L, switching the L users with the maximum spectral efficiency in the target users to the TM9 mode, and switching the N-L users except the L users in the target users to the TM7 mode.
In terms of the capability of supporting different transmission modes by a terminal, in a TDD system, it is generally considered in the industry that the transmission mode set of a UE is { TM3 mode/BF mode }. Wherein, users in TM3 mode use SU-MIMO technology; users in Beamforming (BF) mode may use MU-MIMO technology, i.e., schedule multiple UEs on the same time-frequency resource, and the BF mode includes TM7/TM8/TM 9.
It should be noted that, according to the design of the LTE protocol and the optimization of space division performance, the sum of the maximum number of users that can be supported by the TM8 mode and the TM9 mode, that is, the fifth threshold L, can be calculated. Alternatively, L is generally considered to be 4.
In embodiment 1 of the present invention, the sixth threshold is determined according to a spectral efficiency peak corresponding to the TM3 mode. Optionally, the sixth threshold is set to be a peak of the spectral efficiency corresponding to the TM3 mode multiplied by a weight. Optionally, the weight is close to 1.
Generally, the peak of the spectral efficiency corresponding to the TM9 mode is the largest, the peak of the spectral efficiency corresponding to the TM8 mode is the second highest and lower than the peak of the spectral efficiency corresponding to the TM3 mode, and the peak of the spectral efficiency corresponding to the TM7 mode is the smallest. Therefore, when the number M of users with spectral efficiency greater than the sixth threshold among the target users is greater than the sum L of the number of users that can be supported by the TM9 mode and the TM8 mode, for the target users with spectral efficiency greater than the sixth threshold, the TM9 mode is preferentially selected for all the L users with the maximum spectral efficiency for traffic transmission, and the remaining M-L users use the TM7 mode for traffic transmission. Of course, the remaining N-M users in the target user also use the TM7 mode for traffic transmission.
Optionally, after determining whether the number of users M is greater than the fifth threshold L, the method further includes: and under the condition that M is less than or equal to L, switching M users with the maximum spectral efficiency in the target users to the TM9 mode, switching L-M users with the maximum spectral efficiency except the M users in the target users to the TM8 mode, and switching N-L users except the L users in the target users to the TM7 mode.
For target users with spectrum efficiency greater than the sixth threshold, the TM9 mode is preferentially selected for service transmission; and for target users with the spectrum efficiency not greater than the sixth threshold, the TM8 mode is preferentially selected for service transmission, and the TM7 mode is reused for service transmission under the condition that the number of users which can be supported by the TM9 and the TM8 modes is not enough.
Optionally, after determining whether the number N of target users to be mode-switched is greater than the fifth threshold L, the method further includes: determining the number M 'of users with the spectral efficiency larger than the sixth threshold value in the target user under the condition that N is less than or equal to L, wherein M' is an integer larger than or equal to 0; the M ' users with the greatest spectral efficiency among the target users are switched to the TM9 mode, and the N-M ' users except the M ' users among the target users are switched to the TM8 mode.
It should be noted that, for a target user whose spectral efficiency is greater than the sixth threshold, the TM9 mode is preferentially selected for service transmission; for target users with spectrum efficiency not greater than the sixth threshold, the TM8 mode is preferably selected for traffic transmission.
Optionally, the selecting, as the candidate user, a plurality of users whose traffic loads exceed a second threshold from the users in the cell includes: and selecting a plurality of users with the service loads exceeding a second threshold value and the channel quality condition larger than a seventh threshold value from the users in the cell as the alternative users.
It should be noted that, when selecting a user needing to perform mode switching, the channel quality of the user may be considered in addition to the traffic load of the user itself, so as to better combat space division interference and noise interference.
By the user transmission mode switching method provided in embodiment 1 of the present invention, a base station can dynamically adjust a transmission mode of a user in a self-adaptive manner according to a load condition of a cell, so as to improve service transmission efficiency of the cell.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiment 1 can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Example 2
Embodiment 2 of the present invention provides a user transmission mode switching apparatus, which is used to implement the foregoing embodiments and preferred embodiments, and the description of the apparatus is omitted here. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 2 is a block diagram of a user transmission mode switching apparatus according to embodiment 2 of the present invention, and as shown in fig. 2, the apparatus includes:
a determining module 22, configured to determine an alternative user from users in a cell according to a load condition of the cell;
a selecting module 24, configured to select N users from the candidate users as target users, where N is a positive integer greater than or equal to 1;
and a switching module 26, configured to perform mode switching on the target user.
Optionally, the determining module 22 includes: the first judgment submodule is used for judging whether the current load of the cell exceeds a first threshold value; and the selecting submodule is used for selecting a plurality of users with the service load exceeding a second threshold value from the users of the cell as the alternative users under the condition that the judgment result is yes.
Optionally, the selecting module 24 includes: the first determining submodule is used for determining a correlation value between any user and other users in the alternative users for any user in the alternative users; a second determining submodule, configured to determine a number K of correlation values smaller than a third threshold in a plurality of correlation values corresponding to the any user, where K is an integer greater than or equal to 0; a third determining submodule, configured to use the users with the number K greater than a fourth threshold value in the candidate users as spare users; and the fourth determining submodule is used for determining N users as the target users according to the number of the prepared users and the transmitting antennas of the base station corresponding to the cell.
Optionally, the switching module 26 is further configured to perform mode switching on the target user according to the spectrum efficiency of the target user.
Optionally, the switching module 26 includes: the second judging submodule is used for judging whether the number N of the target users to be switched is greater than a fifth threshold value L, wherein the fifth threshold value L is determined according to the sum of the maximum user numbers which can be supported by the TM8 mode and the TM9 mode; a fifth determining submodule, configured to determine, in a case where N > L, a number M of users whose spectral efficiency is greater than a sixth threshold in the target user, where the sixth threshold is determined according to a spectral efficiency peak corresponding to a TM3 mode; a third judging submodule, configured to judge whether the number M of users is greater than the fifth threshold L; a first switching sub-module, configured to switch, in the case that M > L, the L users with the largest spectral efficiency in the target user to the TM9 mode, and switch, in the case that M > L, the N-L users except the L users in the target user to the TM7 mode.
Optionally, the switching module 26 further includes: the second switching submodule is used for switching the M users with the maximum spectral efficiency in the target user to the TM9 mode under the condition that M is less than or equal to L; switching L-M users with the maximum spectrum efficiency except the M users in the target users to the TM8 mode; and switches N-L users of the target users, excluding the L users, to the TM7 mode.
Optionally, the switching module 26 further includes: a sixth determining submodule, configured to determine, when N is less than or equal to L, a number M 'of users whose spectral efficiency is greater than the sixth threshold in the target user, where M' is an integer greater than or equal to 0; a third switching sub-module, configured to switch M ' users with the largest spectral efficiency among the target users to the TM9 mode, and switch N-M ' users except the M ' users among the target users to the TM8 mode.
Optionally, the selecting submodule is further configured to select, from the users in the cell, a plurality of users whose traffic loads exceed the second threshold and whose channel quality conditions are greater than a seventh threshold as the candidate users.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Example 3
Embodiment 3 of the present invention also provides a method for switching user transmission modes. The method of example 3 of the present invention will be described below with reference to specific scenarios.
The embodiment 3 of the invention groups the users in the cell according to the number of edges in the graph theory. The user can be regarded as a vertex of the graph, an edge is connected between the two vertices, the edge represents the association between the two users, and the edge in embodiment 3 of the present invention refers to the channel cross-correlation between the users. Under a high-load scene, the base station counts the number of the edges of the user, gives a target transmission mode (BF mode or non-BF mode) of the user according to the number of the edges, switches to the BF state after being triggered by a synchronous switching period, and finally determines the transmission mode (TM7/TM8/TM9) of each UE according to the number of MU users in the null packet and the channel condition of each UE; in a low-load scenario, switching of the user transmission mode (TM3) is performed mainly according to the concept of single-UE spectrum efficiency maximization, and certainly, space division pairing may be performed at a time suitable for space division pairing. The specific process is as follows:
step 1: judging the cell load condition, and if the cell load condition is high load, entering the step 2; if the load is low, ending the high load judgment algorithm flow, resetting the synchronous switching timer, and entering the step 5;
step 2: starting a synchronous switching timer, and setting a period as T;
and step 3: if the timing of the synchronous switching timer does not overflow, the transmission scheme self-adaptive switching method of a plurality of users is continuously executed; if the synchronous switching timer overflows, judging the state of the current cell, if the cell is in a low load state, ending the high load algorithm process, and entering the step 5; if the load is still high, the method continues to perform the adaptive switching of the transmission schemes of the multiple users, which specifically comprises the following steps:
step 3.1: the UE is initially selected, a user set with the channel quality condition larger than a threshold and the traffic larger than the threshold is selected as a potential synchronous switching user set, the correlation among the initially selected users is arranged in a matrix form, wherein RijRepresenting the correlation of user i and user j, Rij＝RjiAnd R isiiLet 1 be the threshold of inter-user correlation, if Rij>Rho, indicating that the user i and the user j are not suitable for space division pairing; otherwise, indicating that the user i and the user j are suitable for space division pairing;
the size of the traffic of the UE may be reflected by a Buffer Status Report (BSR), and the larger the value, the larger the traffic required by the UE at this time is.
Step 3.2: calculating the number of edges per UE, for any UEiDefine UEiThe number of edges is: satisfy with UEiThe number of the UEs whose correlation is not more than the correlation threshold rho;
step 3.3: arranging the UE according to the edge number from large to small, deleting the user with the edge number less than 3 from the queue, and recording the queue as Q _ temp;
step 3.4: changing the former N to min (N)TNum (Q temp)) users are prepared to switch to BF mode, where NTRepresenting the number of base station transmit antennas, if N<3, no switching is performed; otherwise, the N users are switched to the BF mode.
Generally speaking, the number of space division users in the same time-frequency resource that can be carried by the base station is not greater than the number of transmitting antennas of the base station, and therefore, the number of users that need to be switched finally can be determined jointly according to the number of transmitting antennas of the base station and the number of users in the Q _ temp queue.
Step 3.5: the BF patterns for these N users are assigned:
considering the characteristics of Demodulation Reference signals (DMRSs) in LTE, embodiment 3 of the present invention specifies that the sum of the number of users of TM8 and TM9 does not exceed a threshold setting, and is specified as L.
Firstly, the Spectral Efficiency (SE) of the N users are sorted in descending order, wherein the SE can be determined according to a Modulation and Coding Scheme (MCS), a rank (rank, RI), and the like:
if N in 3.4 is less than or equal to L:
if SE of M 'users is greater than the product of the TM3 spectrum efficiency peak and a weight, embodiment 3 of the present invention assumes that the weight is 0.9, then switch the M users to TM9, and switch the remaining N-M' users to TM 8;
if N in 3.4 > L:
if SE of M' users is greater than the product of the TM3 spectrum efficiency peak and a weight, embodiment 3 of the present invention assumes that the weight is 0.9, if M < L, then M users are switched to TM9, L-M users are switched to TM8, and if there are remaining UEs, the remaining N-L users are switched to TM 7; if M is larger than or equal to L, L users are switched to TM9, and the rest users are switched to TM 7.
And 4, step 4: after the synchronous switching is finished, restarting the synchronous switching timer, and entering the step 5;
and 5: and executing the self-adaptive switching selection of the transmission mode of the user and entering the step 1.
It should be noted that, it can be determined whether the user switched to the BF state needs to return to the non-BF mode at a later stage according to the SE.
Example 4
Embodiment 4 of the present invention further provides a method for switching user transmission modes. The method of embodiment 4 of the present invention is described below with reference to a specific scenario, and the number of transmit antennas of a base station in a Massive MIMO system is set to 64.
Step 1: setting a cell high load judgment standard, for example, requiring that the PRB utilization rate in a cell is 60%, and the number of users with larger BSR is not less than 6;
step 2: if the cell state meets the requirements in the step 1, starting a synchronous switching timer, and setting the time length to be 20 s;
and step 3: if the timing of the synchronous switching timer does not overflow, the transmission mode self-adaptive switching method of the user is continuously executed, and the user suitable for space division is selected to carry out clustering; if the synchronous switching timer overflows, judging the state of the current cell, if the cell is in a low load state, ending the high load algorithm process, and entering the step 5; if the load is still high, the method for adaptively switching the transmission modes of the users is continuously executed, and the users suitable for space division are selected for clustering, which specifically comprises the following steps:
step 3.1: and performing initial selection on the UE, selecting a user set with a channel quality condition larger than a first set threshold and a BSR larger than a second set threshold as a potential synchronous switching user set, and assuming that the number of users meeting the conditions is 10. Arranging the correlation among the users after the initial selection in a matrix form, wherein the matrix is a 10 x 10 matrix and is shown in the following table;
Figure BDA0002339548500000131
step 3.2: calculating the number of edges per UE, for any UEiDefine UEiThe number of edges is: satisfy with UEiThe number of UEs for which the correlation is not greater than the correlation threshold ρ 0.5, for the presentIn embodiment 4 of the present invention, the numbers of edges between UE1 and UE10 are shown in the following table:
UE1 UE2 UE3 UE4 UE5 UE6 UE7 UE8 UE9 UE10
9 6 7 8 5 4 2 3 3 5
step 3.3: and arranging the UE according to the edge number from large to small, deleting the users with the edge number smaller than 4 from the queue, and randomly sequencing the users if the users with the same edge number exist. Note that this queue is Q _ temp, and the resulting queue is shown in the following table:
Figure BDA0002339548500000132
obviously, UE7, UE8, UE9 do not belong to Q _ temp, and deletions are indicated in grey in the table.
Step 3.4: changing N to min (N)TNum (Q temp)) users are ready to switch to BF mode if N<3, no switching is performed; otherwise, the N users are switched to the BF mode. In example 4 of the invention, NT64, Num (Q _ temp) 7, then switch the 7 users to BF mode;
step 3.5: the BF patterns for these N users are assigned:
the threshold value is set to 4, assuming that the sum of the number of users that TM8 and TM9 can support is not over the threshold.
Firstly, sequencing the SEs (according to the scheduling MCS and RI) of the N users from big to small:
if the SE of the N users is not larger than the product of the TM3 peak value and 0.9, the users are not switched to the TM 9;
switch the top 4 users of the N user SEs to TM 8;
the last three users are switched to TM 7.
And 4, step 4: after the synchronous switching is finished, restarting the synchronous switching timer, and entering the step 5;
and 5: executing self-adaptive switching selection of a transmission mode at a UE level, and entering a step 1;
embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above-mentioned method embodiments when executed.
Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:
s1, determining alternative users from the users of the cell according to the load condition of the cell;
s2, selecting N users from the alternative users as target users, wherein N is a positive integer greater than or equal to 1;
s3, the mode of the target user is switched.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to perform the steps of any of the above method embodiments by means of the computer program.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
s1, determining alternative users from the users of the cell according to the load condition of the cell;
s2, selecting N users from the alternative users as target users, wherein N is a positive integer greater than or equal to 1;
s3, the mode of the target user is switched.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A method for switching transmission modes of a user, comprising:
determining alternative users from users of a cell according to the load condition of the cell;
selecting N users from the alternative users as target users, wherein N is a positive integer greater than or equal to 1;
and switching modes of the target user.
2. The method of claim 1, wherein the determining alternative users from the users of the cell based on the load condition of the cell comprises:
judging whether the current load of the cell exceeds a first threshold value;
and under the condition that the judgment result is yes, selecting a plurality of users with the service loads exceeding a second threshold value from the users of the cell as the alternative users.
3. The method according to claim 1 or 2, wherein said selecting N users from said candidate users as target users comprises:
for any user in the alternative users, determining a correlation value between the any user and other users except the any user in the alternative users;
determining the number K of correlation values smaller than a third threshold value in the plurality of correlation values corresponding to any user, wherein K is an integer greater than or equal to 0;
taking the users with the number K larger than a fourth threshold value in the alternative users as the preparation users;
and determining N users as the target users according to the number of the prepared users and the number of the transmitting antennas of the base station corresponding to the cell.
4. The method of claim 1 or 2, wherein the mode switching for the target user comprises:
and switching modes of the target user according to the spectrum efficiency of the target user.
5. The method of claim 4, wherein the mode switching for the target user according to the spectral efficiency of the target user comprises:
judging whether the number N of the target users is larger than a fifth threshold value L, wherein the fifth threshold value L is determined according to the sum of the maximum number of users which can be supported by the TM8 mode and the TM9 mode;
determining the number M of users with spectral efficiency larger than a sixth threshold in the target users under the condition that N > L, wherein the sixth threshold is determined according to a spectral efficiency peak value corresponding to a TM3 mode, and M is an integer larger than or equal to 0;
judging whether the number M of the users is greater than a fifth threshold value L;
and in the case that M > L, switching L users with the maximum spectral efficiency in the target users to the TM9 mode, and switching N-L users except the L users in the target users to the TM7 mode.
6. The method of claim 5, after determining whether the number of users M is greater than the fifth threshold L, further comprising:
and when M is less than or equal to L, switching M users with the maximum spectral efficiency in the target users to the TM9 mode, switching L-M users with the maximum spectral efficiency except the M users in the target users to the TM8 mode, and switching N-L users except the L users in the target users to the TM7 mode.
7. The method of claim 5, after determining whether the number of target users N is greater than a fifth threshold L, further comprising:
determining the number M 'of users with the spectral efficiency larger than the sixth threshold value in the target user under the condition that N is smaller than or equal to L, wherein M' is an integer larger than or equal to 0;
switching M ' users with the largest spectral efficiency among the target users to the TM9 mode, and switching N-M ' users except the M ' users among the target users to the TM8 mode.
8. The method of claim 2, wherein said selecting a plurality of users with traffic loads exceeding a second threshold from among the users in the cell as the candidate users comprises:
and selecting a plurality of users with the service loads exceeding a second threshold value and the channel quality condition larger than a seventh threshold value from the users of the cell as the alternative users.
9. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to implement the method according to any of claims 1-8.
10. A computer-readable storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method according to any of claims 1-8 when executed.
CN201911370631.1A 2019-12-26 2019-12-26 User transmission mode switching method, electronic device and storage medium Pending CN113056021A (en)

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CN102970717B (en) * 2012-11-27 2015-07-22 北京北方烽火科技有限公司 Method and device for switching different downlink transmission modes of LTE (long term evolution) system
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CN104661242A (en) * 2015-02-06 2015-05-27 大唐移动通信设备有限公司 Data transmission mode switching method and device
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