CN110582116B

CN110582116B - Method and device for scheduling time-frequency resources

Info

Publication number: CN110582116B
Application number: CN201810586488.9A
Authority: CN
Inventors: 张健; 严朝译; 吴青
Original assignee: Shanghai Huawei Technologies Co Ltd
Current assignee: Shanghai Huawei Technologies Co Ltd
Priority date: 2018-06-08
Filing date: 2018-06-08
Publication date: 2023-06-20
Anticipated expiration: 2038-06-08
Also published as: CN110582116A

Abstract

The application provides a method and a device for scheduling time-frequency resources, and belongs to the technical field of communication. The method comprises the following steps: acquiring a target terminal to be scheduled of a target cell; determining at least one terminal meeting preset channel orthogonal conditions with the target terminal in other terminals to be scheduled of the target cell according to the recorded channel orthogonal relation information between the terminals of the target cell; and scheduling the same time-frequency resource for the target terminal and the at least one terminal. By the method and the device, the efficiency of terminal scheduling of the base station can be improved.

Description

Method and device for scheduling time-frequency resources

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for scheduling time-frequency resources.

Background

MIMO (Multiple-Input Multiple-Output) technology supports that a transmitting end and a receiving end use Multiple transmitting antennas and receiving antennas, and different antennas can be used to transmit service data of different terminals, so that there can be terminal combinations in which interference between terminals can be less even if multiplexed on the same time-frequency resource. Such a combination of terminals may be referred to as a channel orthogonal combination of terminals.

For a WTTx (Wireless To The x) network, the terminal has long on-line time, high terminal activation rate, and high time-frequency resource utilization rate, and as the number of terminals increases, the available time-frequency resources of each terminal gradually decrease. In the prior art, a terminal with service transmission requirements but without scheduling can be recorded in a to-be-scheduled terminal list of a base station, and the base station can search for terminals with orthogonal channels in the to-be-scheduled terminal list for combination, so that the terminal combination is multiplexed on the same time-frequency resource when the terminal is scheduled. Thus, the cell capacity of the WTTx network is increased as much as possible in case of limited time-frequency resources.

In carrying out the present application, the inventors have found that the prior art has at least the following problems:

when the base station determines the terminal combination with orthogonal channels in the terminal list to be scheduled, a MUBF (Multi-user Beam Forming, multi-terminal beam forming) pairing algorithm is adopted to calculate the channel correlation between the terminals, and whether the channels of the terminals are orthogonal or not is judged according to the channel correlation. The calculation time of the MUBF pairing algorithm is about one third of the time between the service transmission request of the receiving terminal and the transmission of the service data, and the efficiency of the base station for terminal scheduling is low.

Disclosure of Invention

In order to solve the above problems, the present application provides a method and apparatus for scheduling time-frequency resources. The technical scheme is as follows:

in a first aspect, a method for wireless network access authentication is provided, the method comprising: the base station acquires a target terminal to be scheduled of a target cell; according to the recorded channel orthogonal relation information between the terminals of the target cell, the base station determines at least one terminal meeting a preset channel orthogonal condition with the target terminal in other terminals to be scheduled of the target cell; the base station schedules the same time-frequency resources for the target terminal and the at least one terminal.

Through the processing, when the base station determines the terminal combination in the terminals to be scheduled, if the target terminal to be determined currently exists in the recorded channel orthogonal relation information between the terminals, the base station can determine at least one terminal which can multiplex the same time-frequency resource with the target terminal, namely determine the terminal combination of the channel orthogonality corresponding to the target terminal, so that the channel correlation between the terminals can be avoided, the calculation time is shortened, and the efficiency of determining the terminal combination of the channel orthogonality is improved.

In one possible implementation manner, according to the recorded channel orthogonal relation information between the terminals, determining at least one terminal meeting a preset channel orthogonal condition with the target terminal in other terminals to be scheduled, including: and determining at least one terminal meeting a preset channel orthogonal condition with the target terminal in other terminals to be scheduled according to the recorded spectrum efficiency gains of different terminal combinations of the target cell.

Through the above processing, the channel orthogonality relationship information is represented by the spectral efficiency gain. The spectrum efficiency is related to the channel quality, and if the terminal combination is a terminal combination with orthogonal channels, the interference generated between the terminals is less, and the base station can allocate less time-frequency resources to the terminal combination, the spectrum efficiency gain of the terminal combination will be higher. If the spectral efficiency gain of a terminal combination is greater than a preset threshold, the terminal combination may be considered to be a channel orthogonal terminal combination.

In one possible implementation manner, according to the recorded spectrum efficiency gains of different terminal combinations of the target cell, determining at least one terminal meeting a preset channel orthogonal condition with the target terminal in other terminals to be scheduled includes: according to the recorded spectrum efficiency gains of different terminal combinations of the target cell, selecting a terminal combination with the largest spectrum efficiency gain from terminal combinations with the largest number of terminals, and determining at least one terminal except the target terminal in the terminal combinations with the largest spectrum efficiency gain, wherein the contained terminals are terminals to be scheduled of the target cell and the corresponding spectrum efficiency gains are larger than a preset threshold.

Through the processing, the base station can acquire the terminal combination which is formed by the target terminal and the terminal to be scheduled and has the spectrum efficiency gain larger than the preset threshold value from the recorded channel orthogonal relation information. Because the frequency spectrum efficiency gains of the terminal combinations are all larger than the preset threshold value and all meet the condition of multiplexing time-frequency resources, the base station can select the terminal combination with the largest terminal number, ensure the largest terminal number of multiplexing the same time-frequency resources as much as possible, and further improve the utilization rate of the time-frequency resources.

In one possible embodiment, the method further comprises: determining a plurality of terminal combinations based on terminals in a target cell according to a preset detection period, wherein the number of terminals in the terminal combinations is not greater than a preset maximum value; for each terminal combination, determining the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state and the spectrum efficiency of the terminal combination in the terminal independent calling state, determining the spectrum efficiency gain of the terminal combination based on the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state and the spectrum efficiency of the terminal combination in the terminal independent calling state, and recording.

Through the above processing, the base station can actively transmit the sounding packet to the terminals, and determine the spectral efficiency gain of each terminal combination by individually transmitting the sounding packet to each terminal and transmitting the sounding packet to each terminal combination. Since each possible terminal combination can be detected, the comprehensiveness of the detection result can be ensured, so that the optimal terminal combination can be determined when the terminal combination with orthogonal channels is determined in actual scheduling.

In one possible implementation manner, for each terminal combination, determining the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state and the spectrum efficiency of the terminal combination in the terminal individual call state includes: for each terminal in a plurality of terminal combinations, sending a detection data packet to the terminal according to a preset detection period, adjusting the transmission bandwidth of the detection data packet according to the feedback parameter of the terminal, and determining the transmission bandwidth of the terminal to the detection data packet after the detection data packet is sent to the terminal for a preset period number; for each of a plurality of terminal combinations, multiplexing the same time-frequency resource to send a detection data packet to each terminal in the terminal combination according to a preset detection period, adjusting the transmission bandwidth of the detection data packet according to the feedback parameter of each terminal, and determining the transmission bandwidth of the detection data packet by the terminal combination after the detection data packet is sent to each terminal in the terminal combination for a preset period number; for each terminal combination, determining the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state according to the data volume of the detection data packet and the transmission bandwidth of the terminal combination to the detection data packet, and determining the spectrum efficiency of the terminal combination in the independent terminal calling state according to the data volume of the detection data packet and the transmission bandwidth of each terminal in the terminal combination to the detection data packet.

Through the processing, the base station periodically transmits the detection data packet to the terminal or the terminal combination, and can adjust the transmission bandwidth of the detection data packet transmitted next time according to the feedback parameter reported after the terminal receives the detection data packet. The transmission bandwidth occupied stably is determined after the preset period number, so that the obtained spectrum efficiency is high in accuracy, and the accuracy of spectrum efficiency gain is improved.

In one possible embodiment, the method further comprises: after a detection data packet is sent to each terminal in the terminal combination to reach a preset cycle number, determining and recording Modulation and Coding Strategy (MCS) parameters corresponding to each terminal in the terminal combination; the base station schedules the same time-frequency resource for the target terminal and at least one terminal, comprising: and determining a target time-frequency resource according to the recorded MCS parameters corresponding to each terminal in a target terminal combination consisting of the target terminal and at least one terminal, and scheduling the target time-frequency resource for the target terminal and the at least one terminal.

Through the above processing, the base station continuously adjusts the MCS parameters in the process of transmitting the sounding packet to each terminal in advance, so that the last corresponding MCS parameter tends to converge, that is, the converged MCS parameter may be the MCS parameter that enables the corresponding terminal to obtain better service transmission quality. In the process of transmitting the actual service data of the terminal, the base station can set the initial MCS parameter as the recorded MCS parameter, thereby achieving better service transmission quality, and improving the service transmission quality for the whole transmission process.

In one possible embodiment, the method further comprises: after the detection data packet is sent to each terminal in the terminal combination to reach the preset cycle number, determining the MCS parameter corresponding to each terminal in the terminal combination; subtracting the MCS parameter of each terminal in the terminal combination from the MCS parameter of the corresponding terminal at the beginning of the current detection period to obtain and record the MCS parameter difference value corresponding to each terminal in the terminal combination; the base station schedules the same time-frequency resource for the target terminal and at least one terminal, comprising: for each terminal in a target terminal combination consisting of a target terminal and at least one terminal, determining the sum of a recorded MCS parameter difference value corresponding to the terminal in the target terminal combination and a current MCS parameter of the terminal as the MCS parameter to be used of the terminal; and determining target time-frequency resources according to the MCS parameters to be used of each terminal in the target terminal combination, and scheduling the target time-frequency resources for the target terminal and at least one terminal.

In the process of combining and transmitting the probe data packet to each terminal in advance, the base station may have different channel quality when the terminal needs to transmit the actual service data. Through the processing, before the base station transmits the actual service data of the terminal, the base station can add the initial MCS parameter determined currently and the MCS parameter difference value, and set the transmission parameter corresponding to the terminal according to the obtained MCS parameter, so that the service transmission quality is close to the better service transmission quality, and the flow of adjusting the MCS parameter is shortened.

In one possible implementation manner, according to a preset detection period, a plurality of terminal combinations are determined based on terminals in a target cell, including: if the current idle period is in a preset idle period, determining a plurality of terminal combinations based on terminals in the target cell according to a preset first detection period; if the current busy period is in the preset busy period, determining a plurality of terminal combinations based on the terminals in the target cell according to a preset second detection period; wherein the first detection period is greater than the second detection period.

The traffic transmission requirement of the terminal in the busy period is larger, and the channel quality is unstable, so that the base station can update the channel orthogonal relation information among the terminals more frequently in the busy period, and correspondingly, the number of the terminals in one detection process can be less than that in the idle period. By the processing, the accuracy of the recorded channel orthogonal relationship information can be improved.

In one possible implementation, determining a plurality of terminal combinations based on terminals in a target cell includes: obtaining a fifth preset number of terminals with the maximum downlink data volume in a preset duration in a target cell; based on the fifth preset number of terminals, a plurality of terminal combinations is determined.

The number of terminals currently accessing the base station may be relatively large, and if the probing process is performed on all the terminals, the calculation amount of the base station may be relatively large. Thus, the technician can set the number of terminals involved in the probing process. Through the processing, the efficiency of the base station for recording the channel orthogonal relationship information can be improved.

In a second aspect, an apparatus for scheduling time-frequency resources is provided, where the apparatus for scheduling time-frequency resources includes at least one module configured to implement the method for scheduling time-frequency resources provided in the first aspect.

In a third aspect, there is provided a base station comprising a transceiver, a memory and a processor configured to execute instructions stored in the memory; the processor implements the method of scheduling time-frequency resources provided in the first aspect by executing instructions.

In a fourth aspect, there is provided a computer readable storage medium comprising instructions which, when run on a base station, cause the base station to perform the method of scheduling time-frequency resources provided in the first aspect above.

In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a base station, cause the base station to perform the method of scheduling time-frequency resources provided in the first aspect above.

The technical scheme provided by the embodiment of the invention has the beneficial effects that:

in the embodiment of the invention, when the base station determines the terminal combination with orthogonal channels in the terminals to be scheduled, if the target terminal to be determined currently exists in the recorded channel orthogonal relation information among the terminals, the base station can determine at least one terminal which can multiplex the same time-frequency resource with the target terminal, namely determine the terminal combination with orthogonal channels corresponding to the target terminal, so that the channel correlation among the terminals can be avoided, the calculation time is shortened, the efficiency of determining the terminal combination with orthogonal channels is improved, and the efficiency of the base station for terminal scheduling is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a scenario of a method for scheduling time-frequency resources according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 3 is a process flow diagram of a method for scheduling time-frequency resources according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for determining a terminal combination with orthogonal channels according to an embodiment of the present invention;

FIG. 5 is a flow chart of a probing process provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a flow chart of updating records according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a terminal combination according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a detection cycle according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a data frame structure according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a scheduling time-frequency resource device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a scheduling time-frequency resource device according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The embodiment of the invention provides a method for scheduling time-frequency resources, which can be realized by a base station and can be applied to a wireless communication network, such as a WTx network.

As shown in the schematic scenario of the scheduling time-frequency resource method shown in fig. 1, in a cell managed by a base station, a plurality of terminals may transmit service data based on a bandwidth provided by a network operator. In order to improve the utilization rate of the spectrum resources, the base station can search for a terminal combination with orthogonal channels from a plurality of terminals to be scheduled. When searching for a terminal combination of a certain terminal, in order to avoid calculating the channel orthogonality of the terminal as much as possible, the base station can determine at least one terminal meeting the channel orthogonality condition with the terminal through the pre-recorded channel orthogonality relation information between the terminals. Further, the base station may schedule the same time-frequency resources for the terminal combination. The base station adopts a searching mode to determine the terminal combination with the orthogonal channels, compared with the method for calculating the correlation of the channels, the consumed time is reduced, and the efficiency of determining the terminal combination with the orthogonal channels is improved.

The base station may include a processor 210, a transceiver 220. The transceiver 220 may be coupled to the processor 210 as shown in the schematic diagram of the base station of fig. 2. The transceiver 220 may be configured to transmit and receive messages or data, that is, may receive a service transmission request corresponding to a terminal, transmit and receive service transmission data, transmit and receive probe data packets, and the like, and the transceiver 220 may include an antenna. The processor 210 may be a control center of the base station, connecting various portions of the entire base station, such as the transceiver 220, using various interfaces and lines. In the present invention, the processor 210 may be a CPU (Central Processing Unit ) that may be used for calculating channel correlation between terminals, determining channel orthogonality information between terminals during probing, and the like. The processor 210 may integrate an application processor that primarily processes the operating system and a modem that primarily processes wireless communications. The base station may also include a memory 230, the memory 230 being operable to store software programs and modules, and the processor 210 executing various functional applications and data processing of the base station by reading the software codes and modules stored in the memory.

The following will describe the processing flow of the method for scheduling time-frequency resources shown in fig. 3 in detail with reference to the specific embodiment, and the following may be included:

in step 301, a base station acquires a target terminal to be scheduled of a target cell.

After the terminal is accessed to the network, if the service transmission requirement exists, the base station can receive the service transmission request corresponding to the terminal, and then the terminal can be added into a queue waiting for scheduling. The queue waiting for scheduling may include terminals in a plurality of target cells, forming a list of terminals waiting for scheduling, and the terminals have not yet determined other terminals orthogonal to their channels.

The base station needs to determine the terminal combination with orthogonal channels according to each terminal in the terminal list to be scheduled. In one possible implementation, the base station may sequentially determine the terminal combinations with orthogonal channels corresponding to the terminal combinations according to the sequence of each terminal in the list of terminals to be scheduled. When one terminal combination is determined, the determination of the terminal combination may be continued among the remaining terminals, and one terminal may currently exist only in one terminal combination. For example, the base station may acquire the terminal U in the to-be-scheduled terminal list, so as to determine other terminals V in the terminal combination whose corresponding channels are orthogonal.

In step 302, the base station determines at least one terminal satisfying a preset channel orthogonality condition with the target terminal among other terminals to be scheduled in the target cell according to the recorded channel orthogonality relation information between the terminals in the target cell.

The base station may determine each terminal combination in the target cell in advance, and determine channel orthogonal relationship information between each terminal in the terminal combination, where the channel orthogonal relationship information may be used to indicate whether the corresponding terminal combination may multiplex the same time-frequency resource. When the base station determines the terminal combination of each orthogonal channel in the terminal list to be scheduled, the base station can directly search the terminal combination comprising the target terminal and other terminals to be scheduled in the recorded channel orthogonal relation information between the terminals, and acquire the terminal combination of which the channel orthogonal relation information meets the preset channel orthogonal condition, namely, at least one terminal which can be multiplexed with the same time-frequency resource as the target terminal under the determination.

Of course, there may be a case where the terminal to be scheduled does not previously determine channel orthogonal relationship information with other terminals, for example, a newly-networked terminal, and the base station may calculate channel correlation of the terminal with other terminals. The greater the channel correlation, the weaker the channel orthogonality between terminals, and if data is transmitted based on the same time-frequency resource, and possibly larger interference is generated, the base station may acquire at least one terminal whose channel correlation with the terminal satisfies the channel orthogonality condition, as a terminal combination multiplexed on the same time-frequency resource.

Alternatively, the channel orthogonality information may be spectral efficiency gains, and the corresponding processing of step 302 may be: and the base station determines at least one terminal meeting a preset channel orthogonal condition with the target terminal in other terminals to be scheduled according to the pre-recorded spectrum efficiency gains of different terminal combinations of the target cell.

In one possible implementation, the base station may send a sounding packet to the terminal combination of each terminal of the target cell in advance, and detect the spectrum efficiency gain of each terminal combination. The larger the spectrum efficiency gain of the terminal combination is, the less spectrum resources are occupied by sending the detection data packet to the terminal combination under the condition of ensuring certain transmission quality, and the effect of improving the resource utilization rate can be achieved. The technician may set a preset threshold level of spectral efficiency gain as desired.

The base station may determine the combination of terminals with orthogonal channels in a progressively increasing number of terminals, e.g., the base station may first determine the user V1 with orthogonal channels to terminal U, then determine the user V2 with orthogonal channels to terminal U, V1, and so on. In this case, the specific processing of step 302 may be as follows: in the terminal combination with the number of terminals being 2, inquiring a first terminal combination which comprises a target terminal, wherein the contained terminal is a terminal to be scheduled in a target cell and has the maximum spectrum efficiency gain; if the spectrum efficiency gain of the first terminal combination is greater than a preset threshold, setting A as a terminal in the first terminal combination and B as 3; in the terminal combination with the number of terminals B, inquiring a second terminal combination which comprises the terminal A, is the terminal to be scheduled of the target cell and has the maximum spectrum efficiency gain; if the spectrum efficiency gain of the second terminal combination is larger than a preset threshold, setting A as a terminal in the second terminal combination, adding 1 to the value of B, and turning to execute the process of inquiring the second terminal combination which contains A, is the terminal to be scheduled of the target cell and has the largest spectrum efficiency gain in the terminal combination with the number of B; and if the spectrum efficiency gain of the second terminal combination is smaller than a preset threshold value, determining at least one terminal except the target terminal in A.

The specific processing of 302 above is described in connection with a method flowchart of determining a combination of terminals with orthogonal channels as shown in fig. 4:

in step 3021, the base station may determine whether the recorded channel orthogonality information includes a target terminal.

If so, the process may jump to step 3022a, where a terminal combination with orthogonal channels is determined according to the recorded channel orthogonal relationship information; if not, then step 3022b may be skipped and a combination of terminals with orthogonal channels may be subsequently determined by calculating the channel correlation of the target terminal with other terminals.

Means for determining a terminal combination of channel orthogonality from the recorded channel orthogonality information:

in step 3022a, the base station queries, among terminal combinations with the number of terminals being 2, a first terminal combination including a target terminal, the terminals included being terminals to be scheduled by the target cell, and having the greatest spectrum efficiency gain.

In step 3023a, the base station determines whether the spectral efficiency gain of the first terminal combination is greater than a preset threshold.

If yes, the first terminal combination can multiplex the same time-frequency resource, and can jump to step 3024a to continue searching the terminal orthogonal to the first terminal combination channel; if not, the base station can end the process of determining the terminal combination with orthogonal channels, and can enable the terminal to be scheduled to independently use the allocated time-frequency resources.

In step 3024a, the base station queries, among the terminal combinations having the number of terminals of 3, a second terminal combination including the terminal of the first terminal combination, including terminals to be scheduled in the target cell, and having the greatest spectrum efficiency gain.

In step 3025a, the base station determines whether the spectral efficiency gain of the second terminal combination is greater than a preset threshold.

Similar to step 3023a, if so, the process may jump to step 3026a to continue searching for a terminal orthogonal to the second terminal combination channel; if not, the base station can end the process of determining the terminal combination with orthogonal channels, and schedule the same time-frequency resource for the searched first terminal combination.

In step 3026a, the base station queries, among the terminal combinations having the number of terminals of 4, a third terminal combination including the second terminal combination, including terminals that are all terminals to be scheduled in the target cell and have the greatest spectrum efficiency gain.

In step 3027a, the base station determines whether the spectral efficiency gain of the third terminal combination is greater than a preset threshold.

In practical situations, the number of terminals multiplexing the same time-frequency resource is limited, and a technician can set the maximum number of terminal combinations, and the maximum number is 4 as an example. In step 3027a, if the base station determines that the spectrum efficiency gain of the third terminal combination is greater than the preset threshold, the base station may end the process of determining the terminal combination with orthogonal channels, and schedule the same time-frequency resource for the third terminal combination that is found; if not, the base station can end the process of determining the terminal combination with orthogonal channels, and schedule the same time-frequency resource for the second terminal combination.

For the way the channel correlation of the target terminal with other terminals is calculated:

in step 3022b, the base station calculates channel correlation between the target terminal and any of the remaining terminals to be scheduled, and determines terminal 1 satisfying the channel correlation condition.

After accessing the base station, the terminal may transmit an SRS (Sounding Reference Signal, channel sounding reference signal) to the base station, for example, may periodically transmit the SRS to the base station, and the base station may store the SRS after receiving the SRS. Therefore, the base station can determine the uplink channel matrix of the terminal according to the SRS corresponding to the current stored terminal. When the base station needs to calculate the channel correlation between the target terminal and any other terminal to be scheduled, the base station can calculate the channel correlation between the target terminal and any other terminal to be scheduled according to the uplink channel matrix corresponding to each terminal. The technician may set a preset threshold for channel correlation. The base station may determine whether the channel correlation between the next target terminal and a terminal to be scheduled is smaller than a preset threshold of the channel correlation each time it determines the channel correlation between the next target terminal and the terminal to be scheduled, if so, it indicates that the target terminal and the terminal satisfy the channel correlation condition, the base station may determine the terminal as a terminal 1 that can be combined with the target terminal, stop calculating the channel correlation between the target terminal and the remaining terminals, and jump to step 3023b. If the base station does not determine the terminal satisfying the channel correlation condition with the target terminal in all the other terminals to be scheduled, the base station can end the process of determining the terminal combination with orthogonal channels, and can enable the base station to independently use the allocated time-frequency resources when the target terminal is scheduled.

In step 3023b, the base station determines a theoretical spectral efficiency gain of the target terminal and the terminal 1, and determines whether the theoretical spectral efficiency gain is greater than a preset threshold.

In one possible implementation, after the terminal accesses the base station, the terminal may periodically report CQI (Channel Quality Indicator, channel quality indication) to the base station, which may be used to determine the MCS (Modulation and Coding Scheme, modulation and coding strategy) that the base station employs when scheduling the terminal, one MCS may correspond to one theoretical spectral efficiency.

Furthermore, when determining the theoretical spectral efficiency gains of the target terminal and the terminal 1, the base station may determine the theoretical spectral efficiency when the target terminal is called alone, and then determine the possible theoretical spectral efficiency after the target terminal and the terminal 1 multiplex the same time-frequency resource. Furthermore, the theoretical spectral efficiency gain can be determined according to the theoretical spectral efficiency when the target terminal is singly called and the theoretical spectral efficiency after multiplexing the same time-frequency resource. Then, the base station may determine whether the theoretical spectral efficiency gain is greater than a preset threshold, similar to step 3023a, and if so, may jump to step 3024b to continue searching for a terminal orthogonal to the target terminal and the terminal 1 channel; if not, the terminal 1 and the target terminal do not meet the condition of multiplexing the same time-frequency resources, the base station can end the process of determining the terminal combination with orthogonal channels, and can enable the target terminal to independently use the allocated time-frequency resources when scheduling the target terminal.

In step 3024b, the base station calculates channel correlation between the target terminal, the terminal 1, and any of the remaining terminals to be scheduled, and determines the terminal 2 satisfying the channel correlation condition.

The specific process of determining the channel correlation between the terminals by the base station is similar to step 3022b, and will not be described herein again, if the terminal 2 determined by the base station is orthogonal to the target terminal channel and the terminal 2 and the terminal 1 also have a channel orthogonal relationship, the process may jump to step 3025b. If the other terminals to be scheduled do not meet the condition of channel orthogonality, the base station can end the process of determining the terminal combination of channel orthogonality, and schedule the same time-frequency resource for the searched target terminal and the terminal 1.

In step 3025b, the base station determines theoretical spectral efficiency gains of the target terminal, the terminal 1, and the terminal 2, and determines whether the theoretical spectral efficiency gain is greater than a preset threshold.

The specific process of determining the theoretical spectral efficiency gain between the terminals by the base station is similar to that of step 3023b, and will not be repeated here, if the base station determines that the theoretical spectral efficiency gain is greater than the preset threshold, the step 3026b may be skipped; if the base station judges that the theoretical spectrum efficiency gain is not greater than the preset threshold, the base station can end the process of determining the terminal combination with orthogonal channels, and schedule the same time-frequency resource for the searched target terminal and the terminal 1.

In step 3026b, the base station calculates channel correlations between the target terminal, terminal 1, terminal 2, and any of the remaining terminals to be scheduled, and determines terminal 3 satisfying the channel correlation condition.

The specific process of determining the channel correlation between the terminals by the base station is similar to that of step 3022b, and will not be described herein again, if the terminal 3 determined by the base station has a channel orthogonal relationship with the target terminal, terminal 1, and terminal 2, then step 3027b may be skipped; if the other terminals to be scheduled do not meet the condition of channel orthogonality, the base station can end the process of determining the terminal combination of channel orthogonality, and schedule the same time-frequency resource for the searched target terminal, terminal 1 and terminal 2.

In step 3027b, the base station determines theoretical spectral efficiency gains of the target terminal, the terminal 1, the terminal 2, and the terminal 3, and determines whether the theoretical spectral efficiency gain is greater than a preset threshold.

The specific process of determining the theoretical spectrum efficiency gain between the terminals by the base station is similar to that of step 3023b, and will not be described again here, if the base station determines that the theoretical spectrum efficiency gain is greater than the preset threshold, the base station may end the process of determining the terminal combination with orthogonal channels, and schedule the same time-frequency resource for the searched target terminal, terminal 1, terminal 2 and terminal 3; if the base station judges that the theoretical spectrum efficiency gain is not greater than the preset threshold, the base station can end the process of determining the terminal combination with orthogonal channels, and schedule the same time-frequency resource for the searched target terminal, terminal 1 and terminal 2.

In the above process, if the recorded channel orthogonal relationship information includes the target terminal, the base station only needs to acquire the terminal combination which is formed by the target terminal and other terminals to be scheduled and has the maximum spectrum efficiency gain, and can determine the terminal combination with the orthogonal channel according to the maximum spectrum efficiency gain, so that the calculation of the channel correlation is not needed, the calculation time is shortened, and the efficiency of determining the terminal combination with the orthogonal channel is improved. And the terminal combination under the determination can be the best terminal combination in all the possible terminal combinations at present, but the terminal combination of the next terminal is continuously determined instead of determining a better terminal combination, so that the accuracy of determining the terminal combination with orthogonal channels is improved.

The above-described procedure of determining the terminal combinations of channel orthogonality determines the terminal combinations of channel orthogonality according to a manner of gradually increasing the number of terminals. In another possible implementation manner, the base station may determine the terminal combination with the greatest number of terminals and orthogonal channels, and the corresponding processing in step 302 may be as follows: according to the recorded spectrum efficiency gains of different terminal combinations of the target cell, selecting a terminal combination with the largest spectrum efficiency gain from terminal combinations with the largest number of terminals from terminal combinations with the largest spectrum efficiency gain, wherein the terminal combinations comprise target terminals and terminals to be scheduled of the target cell, and the corresponding spectrum efficiency gains are larger than a preset threshold, and determining at least one terminal except the target terminal in the terminal combinations with the largest spectrum efficiency gain.

The base station may acquire, in the recorded channel orthogonal relationship information, a combination of terminals that are configured by the target terminal and the terminal to be scheduled and have a spectral efficiency gain greater than a preset threshold. Because the frequency spectrum efficiency gains of the terminal combinations are all larger than the preset threshold value and all meet the condition of multiplexing time-frequency resources, the base station can select the terminal combination with the largest terminal number, ensure the largest terminal number of multiplexing the same time-frequency resources as much as possible, and further improve the utilization rate of the time-frequency resources. When determining the terminal combination multiplexing the same time-frequency resource, the terminal combination can be continuously determined in the rest terminals to be scheduled, and the determined terminal is not participated in the process of determining the terminal combination, so that one terminal exists in one terminal combination at most.

In step 303, the base station schedules the same time-frequency resources for the target terminal and the at least one terminal.

After determining the terminal combination including the target terminal in the above process, the base station may schedule the same time-frequency resource to transmit the service data of the terminal combination.

In one possible implementation, the base station may also determine the MCS to be used for the corresponding terminal when transmitting the traffic data of each terminal. Optionally, in the above recorded channel orthogonal relationship information, MCS parameters corresponding to each terminal in the terminal combination may also be recorded at the same time, where the MCS parameters may be used to determine time-frequency resources available to the terminal, for example, the MCS parameters may be MCS indexes, so that the base station searches for corresponding transmission parameters (such as a modulation mode, a transmission rate, and so on) in the MCS list. The corresponding processing of step 303 may be as follows: and determining a target time-frequency resource according to the recorded MCS parameters corresponding to the target terminal and the at least one terminal, and scheduling the target time-frequency resource for the target terminal and the at least one terminal.

In implementation, if the base station determines a terminal combination with orthogonal channels according to the recorded channel orthogonal relationship information, MCS parameters corresponding to each terminal in the terminal combination can also be obtained. Then, the base station can determine the time-frequency resources allocated for the terminal combination according to the MCS parameters corresponding to each terminal. And the base station can also set the transmission parameters corresponding to each terminal according to the MCS parameters corresponding to each terminal in the process of transmitting the service data.

Because the base station continuously adjusts the MCS parameters in the process of transmitting the sounding packets to each terminal combination in advance, the last corresponding MCS parameter tends to converge, that is, the converged MCS parameter may be the MCS parameter that enables the corresponding terminal to obtain better service transmission quality. In the above process, it has been described that the terminal reports CQI to the base station, and before transmitting the actual service data of the terminal, the base station can determine the initial MCS parameter for transmitting the actual service data according to the currently stored CQI of the terminal. In order to achieve better service transmission quality, the base station continuously adjusts the MCS parameters in the process of transmitting the actual service data of the terminal, but if the base station sets the initial MCS parameters as the recorded MCS parameters, the base station can achieve better service transmission quality, and the service transmission quality is improved for the whole transmission process.

However, in the process of combining and transmitting the probe data packet to each terminal in advance, the base station may have different channel quality at the time of the terminal and channel quality when the terminal needs to transmit actual service data, for example, the terminal may be interfered by an adjacent cell, where the CQI reported by the terminal is different, so that when the better service transmission quality is achieved, the MCS parameters corresponding to the terminal are also different.

Thus, in another possible implementation manner, the MCS parameter recorded by the base station may be an MCS parameter difference, where the MCS parameter difference may be a difference between the last determined MCS parameter and the initial MCS parameter in the process of the base station transmitting the sounding packet to each terminal in advance, and the corresponding process of step 303 may be as follows: for each terminal in a target terminal combination consisting of a target terminal and at least one terminal, determining the sum of a recorded MCS parameter difference value corresponding to the terminal in the target terminal combination and a current MCS parameter of the terminal as an MCS parameter to be used of the terminal; and determining target time-frequency resources according to the MCS parameters to be used of each terminal in the target terminal combination, and scheduling the target time-frequency resources for the target terminal and at least one terminal.

Those skilled in the art will appreciate that the MCS parameter differences described above may be the same or similar if the channel is unchanged. Then, before transmitting the actual service data of the terminal, the base station may add the initial MCS parameter and the MCS parameter difference value under the current determination, and set the transmission parameter corresponding to the terminal according to the obtained MCS parameter, so that the service transmission quality is close to the better service transmission quality, and the flow of adjusting the MCS parameter is shortened.

In the following, in conjunction with the probe procedure flowchart shown in fig. 5, the process of the base station transmitting probe packets to each terminal in advance may be as follows:

In step 501, the base station determines a plurality of terminal combinations based on terminals in the target cell according to a preset detection period.

Wherein the number of terminals in the terminal combination is not greater than a preset maximum value.

In one possible implementation, the base station may update the channel orthogonality information between the terminals, which may be spectral efficiency gain, every detection period. In the subsequent process, the base station may determine the spectrum efficiency gain of each terminal combination by sending a sounding packet to each terminal, that is, determine the transmission effect after multiplexing the same time-frequency resource for each terminal combination. Therefore, in order to avoid influencing the transmission of the actual service data of the terminals, the base station can acquire the terminals which do not currently transmit the service data in the target cell when determining the terminal combination, and determine all the terminal combinations formed by the terminals. In addition, in the probing process, if any terminal has a service transmission requirement, the base station can stop sending the probing data packet to the terminal, so as to ensure the transmission of the actual service data of the terminal, and of course, the base station can also continue the probing process in other terminals.

Alternatively, there may be more terminals currently accessing the base station, and if the probing process is performed on all the terminals, the calculation amount of the base station may be larger. Thus, the technician may set the number of terminals involved in the probing process, and the corresponding process of step 501 may be as follows: the base station acquires a preset number of terminals with the largest downlink data volume in a preset duration in a target cell; based on the preset number of terminals, a plurality of terminal combinations are determined. For example, when the base station reaches the detection period, the base station may acquire 4 terminals with the largest downlink data amount in the last hour from the terminals with no service data transmission at present.

The traffic data amounts of the terminals are different in different periods, and thus, the technician can divide the period of one day into an idle period and a busy period, and the corresponding process of step 501 can be as follows: if the current idle period is in a preset idle period, determining a plurality of terminal combinations based on terminals in the target cell according to a preset first detection period; and if the current busy period is in the preset busy period, determining a plurality of terminal combinations based on the terminals in the target cell according to the preset second detection period.

Wherein the first detection period is greater than the second detection period.

As shown in the update record flow chart shown in fig. 6, the base station may determine what period is currently in, and if the period is currently in the preset idle period, the base station may perform the above-described process according to the first detection period corresponding to the idle period; if the current busy period is preset, the base station may perform the above-described process according to the second detection period corresponding to the busy period. The traffic transmission requirement of the terminal in the busy period is larger, and the channel quality is unstable, so that the base station can update the channel orthogonal relation information among the terminals more frequently in the busy period, and correspondingly, the number of the terminals in one detection process can be less than that in the idle period. The detection period can be determined by the time required by one detection process, and the detection period can be longer than the time required by one detection process, namely, after the detection process is finished, the next detection process can be started without standing a horse, so that unnecessary resource waste is avoided. For example, the idle period is 00:00-07:00, the number of terminals in one detection process is 20, and the first detection period is 7 hours, namely, the detection period is updated once; the busy period is 07:00-24:00, the number of terminals in one detection process is 4, and the second detection period is 15 minutes.

The following describes a detection procedure:

as shown in fig. 7, the schematic diagram of the terminal combinations is shown in fig. 7, taking the terminal participating in the current probing process as terminal 1-terminal 4 as an example, there may be 15 terminal combinations determined by the base station, for example, the terminal combination with the number of 2 terminals may be (terminal 1, terminal 2), the terminal combination with the number of 3 terminals may be (terminal 1, terminal 2, terminal 3), and the terminal combination with the number of 4 terminals may be (terminal 1, terminal 2, terminal 3, terminal 4).

In step 502, for each terminal combination, the base station determines the spectral efficiency of the terminal combination in the time-frequency resource multiplexing state and the spectral efficiency of the terminal combination in the terminal individual call state.

In one possible implementation manner, the base station may send the probe data packet to each terminal separately, and for each terminal combination, send the probe data packet to each terminal in the terminal combination by multiplexing the same time-frequency resource, and further, the base station may determine, according to the data amount of the probe data packet and the occupied transmission bandwidth, the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state and the spectrum efficiency of the terminal combination in the terminal separately calling state. The time-frequency resource multiplexing state may refer to a detection process in which the base station transmits a detection data packet to each terminal in the terminal combination by multiplexing the same time-frequency resource, and the terminal independent call state may refer to a detection process in which the base station transmits a detection data packet to each terminal in the terminal combination.

The probe packet may be used to simulate actual service data of the terminal. For convenience of subsequent processing, the data amount of the probe packet sent by the base station may be a fixed value, and after the terminal is instructed to no longer use the probe packet, the locally stored probe packet may be deleted, for example, after the terminal is instructed to report CQI, or after the probe procedure is ended, the probe packet is deleted.

The specific processing of the base station in step 502 may be as follows: for each terminal, sending a detection data packet to the terminal according to a preset detection period, adjusting the transmission bandwidth of the detection data packet according to the feedback parameter of the terminal, and determining the transmission bandwidth of the terminal to the detection data packet after the detection data packet is sent to the terminal for a preset period number; for each terminal combination, multiplexing the same time-frequency resource to send a detection data packet to each terminal in the terminal combination according to a preset detection period, adjusting the transmission bandwidth of the detection data packet according to the feedback parameters of each terminal, and determining the transmission bandwidth of the terminal combination to the detection data packet after the detection data packet is sent to each terminal in the terminal combination for the preset period; for each terminal combination, determining the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state according to the data volume of the detection data packet and the transmission bandwidth of the terminal combination to the detection data packet, and determining the spectrum efficiency of the terminal combination in the independent terminal calling state according to the data volume of the detection data packet and the transmission bandwidth of each terminal in the terminal combination to the detection data packet.

As shown in the detection period schematic diagram of fig. 8, the detection period may include M sub-periods, where M is equal to a sum of the number of terminals P included in the plurality of terminal combinations and the number of terminal combinations Q included in the plurality of terminal combinations, and each of the M sub-periods is used for transmitting a sounding packet of one terminal or one terminal combination of the plurality of terminal combinations, respectively. For example, for terminals 1-4, 15 sub-periods may be included in one detection period.

For each terminal, the base station may periodically send a sounding packet to the terminal during a subinterval corresponding to the terminal. A preset number of probing cycles may be included in one sub-period.

In the first detection period, the base station may determine an initial MCS parameter of the terminal according to the current CQI of the terminal, or the base station may set the initial MCS parameter of the terminal to a preset initial MCS parameter.

The base station may determine a transmission bandwidth allocated to the terminal based on the initial MCS parameter, and the base station may record the transmission bandwidth allocated to the terminal corresponding to the sounding period. For example, different numbers of RBs (Resource blocks) may correspond to different transmission bandwidths, and the base station may determine the number of RBs allocated to the terminal so that the base station transmits a sounding packet to the terminal in units of RBGs (Resource Block Group, resource Block groups).

Then, the base station may determine a target time-frequency resource according to the transmission bandwidth allocated to the terminal, and send the probe packet to the terminal through the target time-frequency resource. For example, the base station may determine a starting idle RB index, and determine an RBG to be used when transmitting a sounding packet to the terminal according to the number of RBs determined.

When the terminal receives the detection data packet sent by the base station, the current channel quality can be determined, and the corresponding CQI is reported to the base station. When the base station receives the CQI, the base station may adjust the MCS parameter of the next sounding period according to the CQI, and continue to send the sounding packet to the terminal according to the procedure described above. The method is characterized in that besides the MCS parameters, the base station can adjust the used target time-frequency resource, and the frequency range used in the last detection period is different from the frequency range used in the last detection period, so that after the preset period number is reached, all available frequency ranges are traversed as much as possible, and the accuracy and the comprehensiveness of the detection result are ensured. For example, the base station may increment the idle RB index of the start of the previous sounding period by 1 as the idle RB index of the start of the present sounding period. Of course, if the RB index is incremented by 1, the base station may further increment the RB index by 1 until a free RB is found. In the probing process, if the RB index is greater than the upper limit value of the RB index after adding 1, the base station may start searching from the lower limit value of the RB index, and circularly search for idle RBs.

After the preset period number, the MCS parameters corresponding to the terminal tend to converge, and the terminal can obtain better service transmission quality. The base station may determine a transmission bandwidth corresponding to the terminal, which may be a transmission bandwidth used in a last sounding period, or may be an average value of transmission bandwidths used in a last preset number of sounding periods. The probing process for the terminal is thus completed. For example, the preset number of cycles may be 3000, and the transmission bandwidth may be an average value of transmission bandwidths used in the 1500 th to 3000 th probing cycles.

For each terminal combination, the base station may multiplex the same time-frequency resource to periodically send the sounding packet to each terminal in the terminal combination in the sub-period corresponding to the terminal combination. Also, a preset number of detection periods may be included in one sub-period, and the preset number may be the same as the preset number in the above process.

The specific detection process is similar to the above process, and will not be described here again. Because in a terminal combination, terminals may interfere with each other, in a detection process of the terminal combination, a CQI reported by the terminal may be different from a CQI reported when the terminal is detected alone, and MCS parameters tending to converge after a preset number of periods may also be different. In addition, when determining the transmission bandwidth used by the terminal combination, the base station may comprehensively consider the current MCS parameters of each terminal in the terminal combination, for example, may determine the transmission bandwidth used by the terminal combination according to the average value of the current MCS parameters of each terminal.

For a terminal combination, after completing the probing procedure of the terminal combination, the base station may calculate the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state according to formula (1):

wherein P is ^after For the spectral efficiency of the terminal combination in the time-frequency resource multiplexing state, n is the number of terminals in the terminal combination,

for the data volume of probe data packet transmitted to terminal n in terminal combination in one probe period, BW ^after And combining corresponding transmission bandwidths for the terminal after the preset cycle number. As already described above, different numbers of RBs may correspond to different transmission bandwidths, where BW ^after The number of RBs may be replaced with a corresponding number of RBs.

The base station may calculate the spectral efficiency of the terminal combination in the terminal alone call state according to equation (2):

wherein P is ^pre For the spectral efficiency of the terminal combination in the terminal alone call state, n is the number of terminals in the terminal combination,

for the data volume of the probe packet sent to the terminal n in one probe period, +.>

And the transmission bandwidth corresponding to the terminal n after the preset period number is adopted. Also here +.>

The number of RBs may be replaced with a corresponding number of RBs.

Alternatively, the base station may determine the first terminal and the second terminal upon completion of a separate probing process for the second terminal The spectrum efficiency of the terminal combination formed by the terminals in the state of single call of the terminals, and after that, each time a single detection process of the terminal is completed, the P corresponding to all terminal combinations formed by the terminals which have completed single detection can be determined ^pre . Alternatively, the base station may determine the corresponding spectrum efficiency after all terminals and all terminal combinations complete the probing process, which is not limited herein.

In step 503, the base station determines and records the spectrum efficiency gain of the terminal combination based on the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state and the spectrum efficiency of the terminal combination in the terminal alone calling state.

The base station can calculate the ratio of the spectrum efficiency in the time-frequency resource multiplexing state and the spectrum efficiency of the terminal combination in the terminal independent calling state to obtain the spectrum efficiency gain of the terminal combination, and the base station can record the determined spectrum efficiency gain and the corresponding record of the terminal combination so as to determine the terminal combination with orthogonal channels in actual scheduling. As shown in formula (3):

wherein, gain _P Spectral efficiency gains for the terminal combination.

Since each probe packet used in the probing process may be the same, the last equation in equation (3) may be true. That is, the process of determining the spectrum efficiency gain of the terminal combination by the base station may be simplified to calculate the ratio of the transmission bandwidth corresponding to the terminal combination to the sum of the transmission bandwidths of each terminal in the terminal combination, and the spectrum efficiency gain is not required to be determined after the spectrum efficiency is determined according to the transmission bandwidth and the data amount of the detection data packet, so that the process of determining the spectrum efficiency gain of the terminal combination is quickened, and the calculation efficiency is improved.

In a possible implementation manner, in the probing process of the terminal combination, the base station determines and records an MCS parameter corresponding to each terminal in the terminal combination after sending a probing data packet to each terminal in the terminal combination for a preset period number.

The above description has introduced that when the base station receives the CQI reported by the terminal, the base station can adjust the MCS parameter of the terminal in the next probing period according to the CQI, and at this time, the base station can record the MSC parameter corresponding to the terminal and the probing period. After the detected data packet is sent to each terminal in the terminal combination to reach the preset period number, the MCS parameter corresponding to each terminal tends to converge, and the base station may record the MSC parameter corresponding to each terminal in the last detected period, or record the average value of the MSC parameters of each terminal in the last preset number of detected periods, which may further be used to set the transmission parameter corresponding to the terminal during actual scheduling.

In another possible implementation manner, the base station may subtract the MSC parameter of each terminal in the last detection period, or the average value of the MSC parameters of each terminal in the last preset number of detection periods from the MSC parameter used in the first detection period to obtain an MSC parameter difference, and record the MSC parameter difference corresponding to the terminal in the terminal combination, which may also be used for setting the transmission parameter corresponding to the terminal during actual scheduling.

For example, in a WTTx network, a base station transmits data according to a data frame as shown in fig. 9, where one data frame may include 6 downlink subframes, 2 uplink subframes, and 2 special subframes. The base station may transmit the sounding packet through a downlink subframe and a special subframe, i.e., the time for transmitting the sounding packet is 80%. One subframe may correspond to one TTI (Transmission Time Interval ) of 1ms, and the sounding period may be one TTI. In the idle period, the base station can acquire 20 terminals without service transmission requirements at present to form 6195 terminal combinations (including the condition of only one terminal, namely, the terminal is detected independently), and the time occupied by an uplink subframe is considered, wherein the time required by the base station to carry out the detection process on the 6195 terminal combinations is 6195×3000/1000/3600/0.8×6.45 hours; in the busy period, the base station can acquire 4 terminals without service transmission requirements at present to form 15 terminal combinations, and the time required by the base station to perform the detection process on the 15 terminal combinations is 15×3000/1000/0.8×56.25 seconds.

In the above steps 501-503, taking no sequence of the probing process of all terminals and all terminal combinations as an example, in a possible implementation manner, the base station may preferentially perform the probing process on the terminal combination with the largest downlink data amount in the terminal combinations with the same number of terminals.

In step 501, the base station may arrange the terminals in the target cell according to the downlink data size from large to small, and determine a plurality of terminal combinations. For example, in fig. 7, the downlink data amount of the terminal 1 is maximized and sequentially arranged.

In steps 502-503, for the terminal combination with the same number of terminals, the base station may perform a probing process from large to small according to the sum of the downlink data amounts. For example, referring to the terminal combination of the number of terminals 2 in fig. 7, the probing process may be performed in the order of (terminal 1, terminal 2) → (terminal 1, terminal 3) → (terminal 2, terminal 4) → (terminal 3, terminal 4).

The rest of the procedures are the same as the above procedures, and will not be repeated here. Under the condition, if any terminal has service transmission requirement in the detection process, the base station can preferentially determine the spectrum efficiency gain of the terminal combination with the largest downlink data quantity, and ensure the accuracy of the terminal combination with larger service data quantity.

In the embodiment of the invention, the base station can actively send the detection data packet to the terminal, and the spectrum efficiency gain of each terminal combination is determined by independently sending the detection data packet to each terminal and sending the detection data packet to each terminal combination. Because each possible terminal combination can be detected, the comprehensiveness of the detection result can be ensured through the embodiment of the invention, so that the optimal terminal combination can be determined when the terminal combination with orthogonal channels is determined in actual scheduling.

Based on the same technical concept, the embodiment of the present invention further provides an apparatus for scheduling time-frequency resources, where the apparatus may be the base station, as shown in fig. 10, and the apparatus includes:

the obtaining module 1010 is configured to obtain a target terminal to be scheduled of a target cell, and specifically may implement the obtaining function in step 301 and other implicit steps;

a determining module 1020, configured to determine, according to the recorded channel orthogonal relationship information between terminals of the target cell, at least one terminal that meets a preset channel orthogonal condition with the target terminal in other terminals to be scheduled of the target cell, where the determining function in step 302 and other implicit steps can be specifically implemented;

the scheduling module 1030 is configured to schedule the same time-frequency resource for the target terminal and the at least one terminal, and may specifically implement the acquiring function in step 303 and other implicit steps.

Optionally, the determining module is configured to:

and determining at least one terminal meeting preset channel orthogonal conditions with the target terminal in other terminals to be scheduled according to the recorded spectrum efficiency gains of different terminal combinations of the target cell.

Optionally, the determining module is configured to:

according to the recorded spectrum efficiency gains of different terminal combinations of the target cell, selecting a terminal combination with the largest spectrum efficiency gain from terminal combinations with the largest number of terminals, wherein the terminal is the terminal to be scheduled of the target cell, and the corresponding spectrum efficiency gain is larger than a preset threshold, and determining at least one terminal except the target terminal in the terminal combination with the largest spectrum efficiency gain.

Optionally, as shown in fig. 11, the apparatus further includes a detection module 1040, where the detection module is configured to:

according to a preset detection period, determining a plurality of terminal combinations based on terminals in the target cell, wherein the number of terminals in the terminal combinations is not greater than a preset maximum value;

for each terminal combination, determining the spectrum efficiency of the terminal combination in a time-frequency resource multiplexing state and the spectrum efficiency of the terminal combination in a terminal independent calling state, and determining and recording the spectrum efficiency gain of the terminal combination based on the spectrum efficiency of the terminal combination in the time-frequency resource multiplexing state and the spectrum efficiency of the terminal combination in the terminal independent calling state.

Optionally, the detection module 1040 is configured to:

for each terminal in the plurality of terminal combinations, sending a detection data packet to the terminal according to a preset detection period, adjusting the transmission bandwidth of the detection data packet according to the feedback parameter of the terminal, and determining the transmission bandwidth of the terminal to the detection data packet after the detection data packet is sent to the terminal for a preset period number;

multiplexing the same time-frequency resource for each terminal combination in the terminal combinations according to a preset detection period, sending a detection data packet to each terminal in the terminal combinations, adjusting the transmission bandwidth of the detection data packet according to the feedback parameters of each terminal, and determining the transmission bandwidth of the terminal combinations to the detection data packet after the detection data packet is sent to each terminal in the terminal combinations for a preset period number;

and for each terminal combination, determining the spectrum efficiency of the terminal combination in a time-frequency resource multiplexing state according to the data volume of the detection data packet and the transmission bandwidth of the terminal combination to the detection data packet, and determining the spectrum efficiency of the terminal combination in a terminal independent calling state according to the data volume of the detection data packet and the transmission bandwidth of each terminal in the terminal combination to the detection data packet.

Optionally, the detection module 1040 is further configured to:

after a detection data packet is sent to each terminal in the terminal combination to reach a preset period number, determining and recording Modulation and Coding Strategy (MCS) parameters corresponding to each terminal in the terminal combination;

the scheduling module 1030 is configured to:

and determining a target time-frequency resource according to the recorded MCS parameters corresponding to each terminal in a target terminal combination consisting of the target terminal and the at least one terminal, and scheduling the target time-frequency resource for the target terminal and the at least one terminal.

Optionally, the detection module 1040 is further configured to:

after a detection data packet is sent to each terminal in the terminal combination to reach a preset period number, determining an MCS parameter corresponding to each terminal in the terminal combination;

subtracting the MCS parameter of each terminal in the terminal combination from the MCS parameter of the corresponding terminal at the beginning of the current detection period to obtain and record the MCS parameter difference value corresponding to each terminal in the terminal combination;

the scheduling module 1030 is configured to:

for each terminal in a target terminal combination formed by the target terminal and the at least one terminal, determining the sum of the recorded MCS parameter difference value corresponding to the terminal in the target terminal combination and the current MCS parameter of the terminal as the MCS parameter to be used of the terminal;

And determining a target time-frequency resource according to the MCS parameters to be used of each terminal in the target terminal combination, and scheduling the target time-frequency resource for the target terminal and the at least one terminal.

Optionally, the detection module 1040 is configured to:

if the current idle period is in a preset idle period, determining a plurality of terminal combinations based on the terminals in the target cell according to a preset first detection period;

if the current busy period is in the preset busy period, determining a plurality of terminal combinations based on the terminals in the target cell according to a preset second detection period;

wherein the first detection period is greater than the second detection period.

Optionally, the detection module 1040 is configured to:

acquiring a fifth preset number of terminals with the maximum downlink data volume in a preset duration in the target cell;

and determining a plurality of terminal combinations based on the fifth preset number of terminals.

It should be noted that, the acquiring module 1010 may be implemented by a processor, the determining module 1020 may be implemented by a processor and a memory together, the scheduling module 1030 may be implemented by a processor and a transceiver together, and the detecting module 1040 may be implemented by a processor, a transceiver and a memory together.

It should be noted that: in the device for scheduling time-frequency resources provided in the above embodiment, when scheduling time-frequency resources, only the division of the above functional modules is used for illustration, in practical application, the above functional allocation may be performed by different functional modules according to needs, that is, the internal structure of the base station is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the apparatus for scheduling time-frequency resources provided in the foregoing embodiments and the method embodiment for scheduling time-frequency resources belong to the same concept, and specific implementation processes thereof are detailed in the method embodiment and are not described herein again.

In the above embodiments, it may be implemented in whole or in part by software, hardware or a combination thereof, and when implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions which, when loaded and executed on a computer, produce, in whole or in part, a process or function in accordance with embodiments of the present invention. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by means of a wired (e.g., coaxial cable, optical fiber, twisted pair), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any medium that can be accessed by a computer or a data storage device including one or more media integrated servers, data centers, and the like. The medium may be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape, etc.), an optical medium (such as an optical disk, etc.), or a semiconductor medium (such as a solid state disk, etc.).

Claims

1. A method of scheduling time-frequency resources, the method comprising:

acquiring a target terminal to be scheduled of a target cell;

according to the recorded spectrum efficiency gains of different terminal combinations of the target cell, selecting a terminal combination with the largest spectrum efficiency gain from terminal combinations with the largest number of terminals from terminal combinations which contain terminals which are to be scheduled of the target cell and have the corresponding spectrum efficiency gains larger than a preset threshold, and determining at least one terminal except the target terminal in the terminal combination with the largest spectrum efficiency gain;

and scheduling the same time-frequency resource for the target terminal and the at least one terminal.

2. The method according to claim 1, wherein the method further comprises:

3. The method of claim 2, wherein for each terminal combination, determining the spectral efficiency of the terminal combination in the time-frequency resource multiplexing state and the spectral efficiency of the terminal combination in the terminal individual invocation state comprises:

4. A method according to any one of claims 2-3, wherein the method further comprises:

the scheduling the same time-frequency resource for the target terminal and the at least one terminal includes:

5. A method according to any one of claims 2-3, wherein the method further comprises:

6. A method according to any of claims 2-3, characterized in that said determining a plurality of terminal combinations based on terminals in said target cell according to a preset detection period comprises:

wherein the first detection period is greater than the second detection period.

7. A method according to any of claims 2-3, characterized in that said determining a plurality of terminal combinations based on terminals in said target cell comprises:

8. An apparatus for scheduling time-frequency resources, the apparatus comprising:

the acquisition module is used for acquiring a target terminal to be scheduled of a target cell;

the determining module is used for selecting a terminal combination with the largest frequency spectrum efficiency gain from terminal combinations with the largest number of terminals from terminal combinations with the contained terminals being terminals to be scheduled of the target cell and the corresponding frequency spectrum efficiency gain being larger than a preset threshold according to the recorded frequency spectrum efficiency gains of different terminal combinations of the target cell, and determining at least one terminal except the target terminal in the terminal combinations with the largest frequency spectrum efficiency gain;

and the scheduling module is used for scheduling the same time-frequency resource for the target terminal and the at least one terminal.

9. The apparatus of claim 8, further comprising a detection module to:

10. The apparatus of claim 9, wherein the detection module is configured to:

11. The apparatus of any one of claims 9-10, wherein the detection module is further configured to:

the scheduling module is used for:

12. The apparatus of any one of claims 9-10, wherein the detection module is further configured to:

the scheduling module is used for:

13. The apparatus according to any one of claims 9-10, wherein the detection module is configured to:

wherein the first detection period is greater than the second detection period.

14. The apparatus according to any one of claims 9-10, wherein the detection module is configured to:

15. A base station comprising a transceiver, a memory, and a processor, wherein:

the transceiver, the memory and the processor being configured to perform the method of any of the claims 1-7.