CN115988660A - Multi-user equipment scheduling method, device, base station and computer readable storage medium - Google Patents
Multi-user equipment scheduling method, device, base station and computer readable storage medium Download PDFInfo
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Abstract
The invention provides a multi-user equipment scheduling method, a multi-user equipment scheduling device, a base station and a computer readable storage medium; the method comprises the following steps: carrying out single-user channel measurement on a plurality of user equipment to obtain single-user channel information; according to the intensity value of the single-user channel information, pairing the user equipment with the wave beam; screening candidate user equipment and candidate beams according to the scheduling conditions of the multi-user equipment; determining priorities of candidate user equipment and candidate beams; determining a target beam and target user equipment according to the priority; allocating resource blocks; performing multi-user scheduling on target user equipment according to the uplink channel information; the multi-user multi-antenna scheduling process combining frequency division multiplexing and space division multiplexing under the millimeter wave system is optimized, multi-user scheduling can be performed by directly utilizing single-user channel information, signaling interaction overhead and extra measurement overhead with user equipment are saved, and the system spectrum efficiency is improved.
Description
Technical Field
Embodiments of the present invention relate to, but not limited to, the field of communications technologies, and in particular, to a method, an apparatus, a base station, and a computer-readable storage medium for scheduling multiple user equipments.
Background
In 5G application, the millimeter wave system uses a mode of combining an analog phase shifter and a digital link for shaping, so that the system cost is reduced. The multi-user multi-input multi-output technology is applied to a millimeter wave system, and can be realized by adopting a method of combining frequency division multiplexing and space division multiplexing. However, the analog-digital mixed forming architecture combining the analog phase shifter and the digital link restricts the antenna channel of the base station, so that the base station only has a wave beam in one direction at one moment of the full bandwidth; user Equipment (UE) needs to access a base station under different beams for communication; hardware constraints of the user equipment also result in the need to calibrate uplink beam measurements at different time instants. The method comprises the steps of firstly selecting a plurality of user equipment for pairing, then reconfiguring uplink measurement resources for the user equipment and measuring to obtain multi-user channel information, or based on an uplink periodic measurement channel initially accessed and configured by the user equipment, using uplink and downlink reciprocal wave beams to measure for multiple times at different measurement occasions to obtain the multi-user channel information, then screening the user equipment meeting multi-user scheduling conditions based on the multi-user channel information, and finally carrying out multi-user scheduling based on the multi-user channel information. The method needs additional signaling interaction with the millimeter wave terminal, which causes large measurement overhead and greatly reduces the performance of the system.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the invention provides a multi-user equipment scheduling method, a multi-user equipment scheduling device, a base station and a computer readable storage medium, which can solve the problem that in a multi-user multi-antenna technology combining frequency division multiplexing and space division multiplexing in a millimeter wave system, single-user channel information cannot be directly adopted but multi-user channel information is adopted, so that the multi-user scheduling overhead is large.
In a first aspect, an embodiment of the present invention provides a multi-user equipment scheduling method, which is applied to a base station, and the method includes:
respectively carrying out single-user channel measurement on a plurality of user equipment accessed to the base station to obtain single-user channel information corresponding to each user equipment, wherein the single-user channel information at least comprises a strength value and uplink channel information fed back by the user equipment to a beam;
for each user equipment, according to the corresponding intensity value, pairing the user equipment with the beam corresponding to the maximum value in the intensity values;
determining at least one candidate user equipment from a plurality of user equipments according to a preset multi-user equipment scheduling condition, and taking the beam paired by the candidate user equipment as a first candidate beam;
determining the priority of the candidate user equipment, and determining the priority of the first candidate beam according to the priority of the candidate user equipment;
determining a target beam according to the priority of the first candidate beam, and determining target user equipment corresponding to the target beam according to the priority of the candidate user equipment;
for each target wave beam, carrying out resource block allocation on the corresponding target user equipment, and obtaining resource block allocation parameters;
and carrying out multi-user equipment scheduling on the target user equipment according to the uplink channel information and the resource block allocation parameters.
In a second aspect, an embodiment of the present invention further provides a multi-user equipment scheduling apparatus, which is applied to a base station, and includes:
a single-user channel measuring unit, configured to perform single-user channel measurement on multiple user equipments accessing the base station, respectively, to obtain single-user channel information corresponding to each user equipment, where the single-user channel information at least includes a strength value and uplink channel information fed back by the user equipment to a beam;
a pairing unit, configured to pair, for each user equipment, the user equipment with the beam corresponding to a maximum value in the intensity values according to the corresponding intensity value;
a first screening unit, configured to determine at least one candidate user equipment from multiple user equipments according to a preset multi-user equipment scheduling condition, and use the beam paired by the candidate user equipment as a first candidate beam;
a priority calculating unit, configured to determine a priority of the candidate user equipment, and determine a priority of the first candidate beam according to the priority of the candidate user equipment;
a second screening unit, configured to determine a target beam according to the priority of the first candidate beam, and determine a target user equipment corresponding to the target beam according to the priority of the candidate user equipment;
a resource block allocation unit, configured to perform resource block allocation for each target beam for the corresponding target user equipment, and obtain resource block allocation parameters;
and the scheduling unit is used for performing multi-user equipment scheduling on the target user equipment according to the uplink channel information and the resource block allocation parameters.
In a third aspect, an embodiment of the present invention further provides a base station, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the multi-user device scheduling method according to the first aspect when executing the computer program.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where the storage medium stores executable instructions, and when executed by a processor, the executable instructions implement the multi-user device scheduling method according to the first aspect.
The embodiment of the invention comprises the following steps: respectively carrying out single-user channel measurement on a plurality of user equipment accessing a base station to obtain single-user channel information corresponding to each user equipment, wherein the single-user channel information at least comprises a strength value and uplink channel information fed back by the user equipment to a beam; for each user equipment, pairing the user equipment with the beam corresponding to the maximum value in the intensity values according to the corresponding intensity value; determining at least one candidate user equipment from a plurality of user equipments according to a preset multi-user equipment scheduling condition, and taking a beam paired by the candidate user equipment as a first candidate beam; determining the priority of the candidate user equipment, and determining the priority of the first candidate beam according to the priority of the candidate user equipment; determining a target beam according to the priority of the first candidate beam, and determining target user equipment corresponding to the target beam according to the priority of the candidate user equipment; for each target wave beam, carrying out resource block allocation on corresponding target user equipment, and obtaining resource block allocation parameters; according to the uplink channel information and the resource block allocation parameters, multi-user equipment scheduling is carried out on target user equipment; the multi-user multi-antenna scheduling process combining frequency division multiplexing and space division multiplexing in the millimeter wave system is optimized, multi-user scheduling can be performed by directly utilizing single-user channel information, signaling interaction overhead and extra measurement overhead with user equipment are saved, and the system spectrum efficiency is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flowchart of a multi-user device scheduling method according to an embodiment of the present invention;
fig. 2 is a detailed flowchart of step S600 in fig. 1;
fig. 3 is a schematic structural diagram of a multi-user equipment scheduling apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that although functional unit division is performed in the device diagram, logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order from the unit division in the device or the flowchart. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number.
The embodiment of the invention provides a multi-user equipment scheduling method, a multi-user equipment scheduling device, a base station and a computer storage medium; respectively carrying out single-user channel measurement on a plurality of user equipment accessing a base station to obtain single-user channel information corresponding to each user equipment, wherein the single-user channel information at least comprises a strength value and uplink channel information fed back by the user equipment to a beam; for each user equipment, according to the corresponding intensity value, pairing the user equipment with the beam corresponding to the maximum value in the intensity values; determining at least one candidate user equipment from a plurality of user equipments according to a preset multi-user equipment scheduling condition, and taking a beam paired by the candidate user equipment as a first candidate beam; determining the priority of the candidate user equipment, and determining the priority of the first candidate beam according to the priority of the candidate user equipment; determining a target beam according to the priority of the first candidate beam, and determining target user equipment corresponding to the target beam according to the priority of the candidate user equipment; for each target wave beam, carrying out resource block allocation on corresponding target user equipment, and obtaining resource block allocation parameters; according to the uplink channel information and the resource block allocation parameters, multi-user equipment scheduling is carried out on target user equipment; the multi-user multi-antenna scheduling process combining frequency division multiplexing and space division multiplexing in the millimeter wave system is optimized, multi-user scheduling can be performed by directly utilizing single-user channel information, signaling interaction overhead and extra measurement overhead with user equipment are saved, and the system spectrum efficiency is improved.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, fig. 1 is a flowchart of a multi-user device scheduling method; the multi-user equipment scheduling method is applied to a base station, and the base station applies a multi-user multiple-input multiple-output system.
As shown in fig. 1, a method for scheduling multiple user devices includes, but is not limited to, the following steps:
step S100, performing single user channel measurement on a plurality of user equipments accessing to the base station, respectively, to obtain single user channel information corresponding to each user equipment, where the single user channel information at least includes a strength value and uplink channel information fed back by the user equipment to the beam.
It should be noted that the single-user channel refers to a channel measured by the base station using a beam corresponding to a single user, and the multi-user channel refers to a channel measured by the base station using a beam corresponding to a multi-user. In the millimeter wave system, due to the existence of analog beams, a multi-user pair needs to be selected first, and then a base station receives a channel Sounding Reference Signal (SRS) by using beams corresponding to multiple users, so that the multi-user channel measurement can be realized. Therefore, the single-user channel measurement is simpler in acquisition and calculation compared with the multi-user channel measurement, and meanwhile, the cost is lower.
It should be noted that the user equipment includes a mobile terminal, an intelligent terminal, a multimedia device, a streaming media device, and other user terminals.
For step S100, the single user channel measurement includes downlink channel beam strength measurement, and the measured single user channel information is a strength value fed back to the beam by the user equipment. The downlink channel beam intensity measurement specifically comprises: the base station sequentially transmits a plurality of wave beams to each user equipment accessed to the base station to obtain the strength value fed back by the user equipment to different wave beams. For example, 10 ues in a cell access a base station, the base station covers the whole cell by using 16 preset beams, and when the base station performs downlink channel beam strength measurement, the base station first transmits a beam with a beam number of 1 to each ue, receives feedback of each ue on the beam with the beam number of 1, and measures a strength value. Then, the beam with the beam number 2 is re-emitted, and feedback of the beam with the beam number 2 by each user equipment is received and the intensity value is measured. And polling the beams according to the process until 16 preset beams are transmitted to the user equipment, and further obtaining the strength value fed back by the user equipment to the beams.
In addition, after the measurement of the downlink channel beam intensity is completed and the intensity value fed back by each user equipment to each beam is obtained, the method further comprises the following steps: constructing an intensity table according to the intensity value fed back by each user equipment to each wave beam, and recording the intensity table in a log; the intensity table comprises intensity values fed back by each user equipment for each beam. The intensity table is recorded in a log, so that the intensity table is convenient to call and query later.
The base station measures the downlink channel beam intensity of 10 accessed user equipments through 16 preset beams, and the obtained intensity table is shown in table 1.
TABLE 1 Strength Meter
In addition, P is 1,1 The UE number 1 indicates the strength value fed back by the UE with respect to the beam number 1, and the same applies to other cases.
The single-user channel measurement comprises uplink channel sounding reference signal measurement, and the single-user channel information obtained through measurement is uplink channel information. The uplink channel sounding reference signal measurement specifically includes: the method comprises the steps that uplink channel sounding reference signal measurement is respectively carried out on a plurality of user equipment accessing a base station, each user equipment can send channel sounding reference signals to the base station at different moments, namely, uplink channel information is the channel sounding reference signals, and the channel sounding reference signals are used for estimating the uplink channel quality and providing reference for multi-user scheduling.
Of course, through the single-user channel measurement, other single-user channel information may also be obtained, such as the channel quality of the user equipment and the correlation of each channel corresponding to the user equipment.
Step S200, for each user equipment, according to the corresponding intensity value, pairing the user equipment with the beam corresponding to the maximum value in the intensity values.
For step S200, the maximum value of the intensity values corresponding to each user equipment may be determined from the intensity table, and the user equipment is paired with the beam corresponding to the maximum value. For example, for the UE with UE number 1, the maximum value P from which the corresponding strength value can be obtained is searched from the strength table 1,2 Then, the UE with UE number 1 is paired with the beam with beam number 2, that is, the UE with UE number 1 will communicate with the base station using the beam with beam number 2.
Step S300, according to a preset multi-user device scheduling condition, determining at least one candidate user device from a plurality of user devices, and using a beam paired by the candidate user device as a candidate beam.
For step S300, according to a preset multi-user device scheduling condition, at least one candidate user device is determined from multiple user devices, and a beam paired by the candidate user device is used as a first candidate beam, which specifically includes: determining at least one candidate user equipment from the plurality of user equipments according to the channel quality of the user equipment and the correlation of each channel corresponding to the user equipment, and taking a beam paired by the candidate user equipment as a first candidate beam.
For example, a beam with a beam number of 2 is paired with a user equipment with a UE number of 1 and a user equipment with a UE number of 3, and the user equipment with the UE number of 1 meets the multi-user equipment scheduling condition, while the user equipment with the UE number of 3 does not meet the multi-user equipment scheduling condition, the user with the UE number of 1 is taken as a candidate user equipment, and the user with the UE number of 3 is not taken as the candidate user equipment; correspondingly, the beam with beam number 2 is taken as the first candidate beam.
For another example, if the beam with the beam number 1 is paired with the UE number 5, and the UE with the UE number 5 does not meet the multi-UE scheduling condition, the UE with the UE number 5 is not a candidate UE, and correspondingly, the beam with the beam number 1 is not the first candidate beam.
It should be noted that the preset scheduling condition of the multi-user device is a condition function determined by the channel quality of the user device and the correlation of each channel corresponding to the user device, and can be obtained according to historical data.
In addition, in step S300, after the step of determining at least one candidate user equipment from the plurality of user equipments according to the preset multi-user equipment scheduling condition, and using the beam paired by the candidate user equipment as the first candidate beam, the method further includes the following steps: constructing a pairing table according to the pairing relationship between the beam and the user equipment and the pairing relationship between the beam and the candidate user equipment, and recording the pairing table in a log; the pairing table comprises at least pairing relationships of beams and user devices and pairing relationships of beams and candidate user devices. The pairing list is recorded in a log, so that the pairing list is convenient to call and query later.
Table 2 shows an obtained pairing table after the base station measures the downlink channel beam intensity of 10 accessed user equipments through 16 preset beams.
TABLE 2 pairing watch
| Beam numbering | 1 | 2 | 3 | ... | 15 | 16 |
| User equipment | {n 1 } | {n 2 } | {n 3 } | ... | {n 15 } | {n 16 } |
| Number of user equipments | N 1 | N 2 | N 3 | ... | N 15 | N 16 |
| Candidate user equipment | N 1,MU | N 2,MU | N 3,MU | ... | N 15,MU | N 16,MU |
In Table 2, { n } 1 Denotes a set of user equipments paired with a beam with beam number 1, N 1 Is { n 1 The number of user equipments in the set, N 1,MU Is n paired with the beam with beam number 1 1 A set of candidate user equipments meeting the scheduling conditions of the multi-user equipments in the }; and correspondingly, the other same reasons.
Step S400, determining the priority of the candidate user equipment, and determining the priority of the first candidate beam according to the priority of the candidate user equipment.
For step S400, determining the priority of the candidate ue, specifically: and obtaining the priority of the candidate user equipment according to the service type of the candidate user equipment. The priority may be calculated by a function related to the service type of the user equipment, including retransmission, guaranteed bit rate, etc.
Determining the priority of the first candidate beam according to the priority of the candidate user equipment specifically includes: and for each candidate beam, carrying out weighted average on the priorities of the candidate user equipment corresponding to the first candidate beam to obtain the priority of the first candidate beam.
Step S500, determining a target beam according to the priority of the first candidate beam, and determining target user equipment corresponding to the target beam according to the priority of the candidate user equipment.
For step S500, determining the target beam according to the priority of the first candidate beam specifically includes: screening a second candidate beam from the first candidate beam, wherein the second candidate beam is the first candidate beam with the number of corresponding candidate user equipment larger than or equal to a first set threshold; and taking the priority of the first candidate beams as the priority of the second candidate beams, when the number of the second candidate beams is greater than or equal to a second preset threshold, sorting the priorities of the second candidate beams according to a descending order, and selecting all the second candidate beams ranked before the second preset threshold as target beams.
It should be noted that the first preset threshold is obtained according to historical experience, and the specific value may be changed according to actual requirements. The second preset threshold is obtained according to actual requirements, that is, the number of target user equipments that need to perform multi-user equipment scheduling.
For example, the first set threshold is 2, and the first candidate beam includes a beam with a beam number of 2, a beam with a beam number of 5, a beam with a beam number of 8, and a beam with a beam number of 10. If the beam with the beam number of 2 is paired with the user equipment with the UE number of 1, the candidate user equipment is 1 and is smaller than a first set threshold; the beam with the beam number of 5 is paired with the user equipment with the UE number of 4 and the user equipment with the UE number of 6, the beam with the beam number of 8 is paired with the user equipment with the UE number of 7 and the user equipment with the UE number of 8, and then the candidate user equipment is 2 and is equal to a first set threshold; if the beam with the beam number of 10 is paired with the user equipment with the UE number of 9 and the user equipment with the UE number of 10, the candidate user equipment is 2 and is equal to the first set threshold. The beam with the beam number 5, the beam with the beam number 8, and the beam with the beam number 10 are taken as the second candidate beams.
UE number 4 user equipment has a priority of 0.5, UE number 6 user equipment has a priority of 0.7, and beam number 5 beam has a priority of 0.6. The priority of the user equipment with the UE number 7 is 0.3, the priority of the user equipment with the UE number 8 is 0.7, and the priority of the beam with the beam number 5 is 0.5. The priority of the user equipment with the UE number 9 is 0.7, the priority of the user equipment with the UE number 10 is 0.9, and the priority of the beam with the beam number 10 is 0.8.
The number of the second candidate beams is 3, which is greater than a second preset threshold. Then the beam with the beam number 5, the beam with the beam number 8 and the beam with the beam number 10 are sorted according to the priority from large to small, and the sorting result is as follows: beam number 10, beam number 5, and beam number 8. The first 2 beams, i.e., the beam with the beam number 10 and the beam with the beam number 5, are selected as the target beam.
For another example, in another embodiment, the second preset threshold is 4. Only the beam with the beam number 5, the beam with the beam number 8, and the beam with the beam number 10 are taken as the second candidate beams. If the number of the candidate beams is 3 and is less than the second preset threshold, the subsequent steps are not continuously executed until the new user equipment accesses the base station and the sum of the number of the second candidate beams corresponding to the new user equipment and the number of the second candidate beams corresponding to the previous user equipment is greater than or equal to the second preset threshold.
The determining, according to the priority of the candidate user equipment, the target user equipment corresponding to the target beam specifically includes: and for each target beam, sorting the priorities of the corresponding candidate user equipment according to a descending order, and selecting all the candidate user equipment with the ranking before a third preset threshold value as the target user equipment.
It should be noted that the third preset threshold is obtained according to historical experience, and the specific value may be changed according to actual requirements.
For example, the third preset threshold is 1, for a beam with a beam number of 5 as a target beam, the priority of the user equipment with a UE number of 4 is 0.5, the priority of the user equipment with a UE number of 6 is 0.7, the user equipment with a UE number of 4 and the user equipment with a UE number of 6 are sorted according to the priority from large to small, and the sorting result is: the UE with the UE number 6 and the UE with the UE number 4 select the first 1 UEs, that is, the UE with the UE number 6, as the target UE.
For the beam with the beam number of 10, the priority of the user equipment with the UE number of 9 is 0.7, the priority of the user equipment with the UE number of 10 is 0.9, the user equipment with the UE number of 9 and the user equipment with the UE number of 10 are sorted according to the priority from large to small, and the sorting result is as follows: the user equipment with the UE number 10 and the user equipment with the UE number 9 select the first 1 user equipment, that is, the user equipment with the UE number 10, as the target user equipment.
That is, the final target UE is UE number 6 and UE number 10.
The target beam and the target user equipment suitable for multi-user equipment scheduling under the combination of frequency division multiplexing and space division multiplexing can be screened out through the step S500.
Step S600, for each target wave beam, resource block allocation is carried out for the corresponding target user equipment, and resource block allocation parameters are obtained.
For step S600, for each target beam, resource Block (RB) allocation is performed for the corresponding target ue, and Resource Block allocation parameters are obtained, which specifically include: and for the target user equipment corresponding to each target beam, distributing resource blocks for the target user equipment based on a frequency division multiplexing rule according to the business data volume ratio of the target user equipment, and obtaining resource block distribution parameters.
For example, a resource block includes N RB And (4) sub-blocks. The beam with the beam number of 7 and the beam with the beam number of 4 are used as target beams, 1 user equipment is used as target user equipment in the beam pair with the beam number of 7, the target user equipment is defined as UE7-1, and 2 user equipment are used as target user equipment in the beam pair with the beam number of 7, and the target user equipment is respectively defined as UE4-1 and UE4-2.
For the beam with the beam number of 7, as only one target user equipment UE7-1 is paired, the service data volume of the UE7-1 accounts for 100%, the whole resource block is allocated to the UE7-1, and the resource block occupied by the UE7-1 is 1-N RB 。
For the beam with the beam number of 4, the traffic data volume ratio of the UE4-1 and the UE4-2 is a: b, and a + b =1, then the resource block occupied by the UE4-1 is 1-N RB1 The resource block occupied by the UE4-2 is N RB1 -N RB . And the ratio of the number of the resource blocks occupied by the UE4-1 to the number of the resource blocks occupied by the UE4-2 is the same as the ratio of the service data volume of the UE4-1 to the service data volume of the UE4-2, namely a: b. Then the resource block allocation parameter is N RB1 。
Since step S700 is a step performed according to the uplink channel information, and the time from processing step S200 to step S600 is required to acquire the uplink channel information in step S100, before step S700 is executed, in order to ensure that the uplink channel information of the target ue is within the time interval threshold, the method further includes a step of updating the outdated uplink channel information, which includes, but is not limited to, the following steps:
acquiring the measurement time of the uplink channel information of the target user equipment, wherein the measurement time is the time for measuring the uplink channel sounding reference signal in the step S100 to acquire the uplink channel information; obtaining a measurement time interval according to the measurement time and the current time; and re-measuring the uplink channel sounding reference signal by the target user equipment with the measurement time interval exceeding the time interval threshold to obtain new uplink channel information so as to replace the outdated uplink channel information.
The time interval threshold is set manually and obtained from historical experience.
Referring to fig. 2, in step S700, multi-user equipment scheduling is performed on a target user equipment according to uplink channel information and resource block allocation parameters.
For step S700, the base station issues a command to the physical layer to perform step S700. Step S700 includes, but is not limited to, the following steps:
step S710, calibrating uplink channel information corresponding to the target ue.
For step S710, the channel sounding reference signals received by the base station at different times have amplitude phase errors, and uplink channel information corresponding to the target user equipment is calibrated, which is favorable for improving the accuracy of the analog-to-digital hybrid precoding weight, and is further favorable for downlink multi-user scheduling.
And S720, distributing the resource blocks to obtain a plurality of second resource blocks according to the resource block distribution parameters.
For example, the target device users UE4-1 and UE4-2 corresponding to the beam with the beam number 4 are respectively configured with 1-N RB1 Resource block and N RB1 -N RB The resource block of (a); the target equipment user UE7-1 corresponding to the beam with the beam number of 7 is paired with 1-N RB The resource block of (1), the target device user UE14-1 and UE14-2 corresponding to the beam with the beam number 14 are respectively paired with 1-N RB2 Resource block and N RB2 -N RB Resource block of (1)<N RB1 <N RB2 <N RB . Then the resource block allocation parameter is N RB1 And N RB2 . Then in step S730, according to the resource block allocation parameter N RB1 And N RB2 And allocating resource blocks to obtain 3 second resource blocks which are respectively as follows: 1-N RB1 ，N RB1 -N RB2 ，N RB2 -N RB 。
In another embodiment, if N RB1 ＝N RB2 Then, 2 second resource blocks are allocated to the resource block, which are respectively: 1-N RB1 And N RB1 -N RB 。
And step S730, calculating the analog-digital mixed precoding weight value for each second resource block according to the calibrated uplink channel information.
For step S730, the uplink channel information may be used for channel estimation to obtain an optimal precoding matrix, so that the sub-resource blocks calculate the analog-to-digital mixed precoding weight according to the calibrated uplink channel information
Target equipment users UE4-1 and UE4-2 corresponding to the beam with the beam number of 4 are respectively configured with 1-N RB1 Resource block and N RB1 -N RB The resource block of (a); the target equipment user UE7-1 corresponding to the beam with the beam number of 7 is paired with 1-N RB The target equipment user UE14-1 and UE14-2 corresponding to the beam with the beam number of 14 are respectively paired with 1-N RB2 Resource block and N RB2 -N RB Resource block of (1)<N RB1 <N RB2 <N RB And allocating resource blocks to obtain 3 second resource blocks which are respectively as follows: 1-N RB1 ，N RB1 -N RB2 ，N RB2 -N RB . Then to 1-N RB1 According to the updated uplink channel information of the UE7-1, the UE4-1 and the UE14-1, calculating an analog-digital mixed precoding weight; to N RB1 -N RB2 According to the calibrated uplink channel information of the UE7-1, the UE4-2 and the UE14-1, calculating an analog-digital mixed precoding weight; to N RB2 -N RB And the second resource block calculates the analog-digital mixed precoding weight according to the updated uplink channel information of the UE7-1, the UE4-2 and the UE 14-2.
In another embodiment, the target device users UE4-1 and UE4-2, respectively, with beam number 4 are configured with 1-N RB1 Resource block and N RB1 -N RB The resource block of (a); the target equipment user UE7-1 corresponding to the beam with the beam number of 7 is paired with 1-N RB The resource block of (1), the target device user UE14-1 and UE14-2 corresponding to the beam with the beam number 14 are respectively paired with 1-N RB2 Resource block and N RB2 -N RB Resource block of (1)<N RB1 ＝N RB2 <N RB 2 resource blocks are allocatedThe second resource block is respectively as follows: 1-N RB1 And N RB1 -N RB . Then to 1-N RB1 According to the updated uplink channel information of the UE7-1, the UE4-1 and the UE14-1, calculating an analog-digital mixed precoding weight value by the second resource block; to N RB1 -N RB According to the calibrated uplink channel information of the UE7-1, the UE4-2 and the UE14-2, the second resource block calculates an analog-digital mixed precoding weight.
The analog-digital hybrid precoding is a concatenation that decomposes the all-digital precoding into two parts: digital baseband low-dimensional precoding is implemented with a small number of radio frequency links to eliminate inter-user interference, and analog radio frequency high-dimensional precoding is implemented with a large number of analog phase shifters to increase antenna array gain. The analog-digital mixed pre-coding can achieve the purpose of greatly reducing the number of radio frequency links and the processing complexity with less performance loss, thereby improving the power efficiency of the system.
And step S740, performing downlink multi-user scheduling on the target user according to the space division multiplexing rule according to the analog-digital mixed pre-coding weight under the environment of the multi-input multi-output system.
In step S700, the physical layer employs adaptive adjustment techniques of beam alignment, resource block allocation and hybrid precoding to perform resource optimization, so as to improve throughput and data transmission link performance in a multi-user multiple-input multiple-output environment combining frequency division multiplexing and space division multiplexing.
The multi-user equipment scheduling method is used for measuring a single-user channel, screening and matching target user equipment and a target beam by using single-user measurement information, calibrating the beam by using a base station according to the single-user measurement information, and realizing downlink multi-user multi-antenna scheduling combining frequency division multiplexing and space division multiplexing by using a calibrated uplink measurement channel. The multi-user multi-antenna scheduling flow combining frequency division multiplexing and space division multiplexing in a millimeter wave system is optimized, uplink measurement resources of user equipment do not need to be reconfigured, and signaling interaction overhead with the user equipment is saved; multi-user channel measurement is not needed, and user screening is performed according to multi-user channel measurement information, so that additional measurement overhead is saved; meanwhile, the scheduling process is optimized, and the spectrum efficiency of the multi-input multi-output system is improved.
In addition, an embodiment of the present invention further provides a multi-user equipment scheduling apparatus, which is applied to a base station and applies the multi-user equipment scheduling method.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a multi-user device pairing apparatus. The multi-user equipment scheduling device comprises a single-user channel measuring unit 100, a pairing unit 200, a first screening unit 300, a priority calculating unit 400, a second screening unit 500, a resource block allocating unit 600 and a scheduling unit 700.
The single-user channel measurement unit 100 is configured to perform single-user channel measurement on multiple user equipments accessing to a base station, respectively, to obtain single-user channel information corresponding to each user equipment, where the single-user channel information at least includes a strength value and uplink channel information fed back by the user equipment to a beam; the pairing unit 200 is configured to pair, for each user equipment, the user equipment with a beam corresponding to a maximum value in the intensity values according to the corresponding intensity value; the first screening unit 300 is configured to determine at least one candidate user equipment from multiple user equipments according to a preset multi-user equipment scheduling condition, and use a beam paired by the candidate user equipment as a first candidate beam; the priority calculating unit 400 is configured to determine a priority of the candidate user equipment, and determine a priority of the first candidate beam according to the priority of the candidate user equipment; the second screening unit 500 is configured to determine a target beam according to the priority of the first candidate beam, and determine a target user equipment corresponding to the target beam according to the priority of the candidate user equipment; the resource block allocation unit 600 is configured to perform resource block allocation for each target beam for the corresponding target ue, and obtain resource block allocation parameters; the scheduling unit 700 is configured to perform multi-user equipment scheduling on the target user equipment according to the uplink channel information and the resource block allocation parameter.
It should be noted that, in this embodiment, each unit of the multi-user equipment scheduling apparatus corresponds to each step of the multi-user equipment scheduling method one to one, and the same technical means is adopted, so that the same technical effect is achieved, and details are not described herein.
Those skilled in the art will understand that the functions implemented by each unit in the multi-user equipment scheduling apparatus can be understood by referring to the related description of the multi-user equipment scheduling method. The functions of the units in the multi-user equipment scheduling device can be realized by a program running on a processor, and can also be realized by specific logic circuits, such as a programmable logic array (FPGA) and the like.
In addition, an embodiment of the invention also provides a base station.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a base station. The base station includes: memory 20, processor 10 and a computer program stored on memory 20 and executable on processor 10. The processor 10, when executing the computer program, implements the user equipment scheduling method as above.
The processor 10 and memory 20 may be connected by a bus 30 or otherwise.
The memory 20, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. Further, the memory 20 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 20 may optionally include memory located remotely from the processor, which may be connected to the processor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The non-transitory software program and instructions required to implement the information processing method of the above-described embodiment are stored in the memory 20, and when executed by the processor, perform the multi-user device scheduling method of the above-described embodiment, for example, perform steps S100 to S700, and steps S710 to S740 described above.
The above described node embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, an embodiment of the present invention also provides a computer-readable storage medium storing computer-executable instructions, which are executed by a processor or a controller, for example, by a processor, and can cause the processor to execute the multi-user device scheduling method in the above embodiment, for example, execute the above-described steps S100 to S700, and steps S710 to S740.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program elements or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program elements, or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those of ordinary skill in the art.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (15)
1. A multi-user equipment scheduling method is applied to a base station, and comprises the following steps:
respectively carrying out single-user channel measurement on a plurality of user equipment accessed to the base station to obtain single-user channel information corresponding to each user equipment, wherein the single-user channel information at least comprises a strength value and uplink channel information fed back by the user equipment to a beam;
for each user equipment, according to the corresponding intensity value, pairing the user equipment with the beam corresponding to the maximum value in the intensity values;
determining at least one candidate user equipment from a plurality of user equipments according to a preset multi-user equipment scheduling condition, and taking the beam paired by the candidate user equipment as a first candidate beam;
determining the priority of the candidate user equipment, and determining the priority of the first candidate beam according to the priority of the candidate user equipment;
determining a target beam according to the priority of the first candidate beam, and determining target user equipment corresponding to the target beam according to the priority of the candidate user equipment;
for each target wave beam, carrying out resource block allocation on the corresponding target user equipment, and obtaining resource block allocation parameters;
and carrying out multi-user equipment scheduling on the target user equipment according to the uplink channel information and the resource block allocation parameters.
2. The method of claim 1, wherein the determining a target beam according to the priority of the first candidate beam comprises:
screening a second candidate beam from the first candidate beams, wherein the second candidate beam is the first candidate beam with the number of the corresponding candidate user equipment larger than or equal to a first set threshold;
and taking the priority of the first candidate beams as the priority of the second candidate beams, when the number of the second candidate beams is greater than or equal to a second preset threshold, sorting the priorities of the second candidate beams according to a descending order, and selecting all the second candidate beams before the second preset threshold as target beams.
3. The method as claimed in claim 1, wherein the determining the target ue corresponding to the target beam according to the priority of the candidate ues comprises:
and for each target beam, sorting the priorities of the corresponding candidate user equipment in a descending order, and selecting all the candidate user equipment with the ranking before a third preset threshold value as target user equipment.
4. The method according to claim 1, wherein the allocating resource blocks for the corresponding target ues for each target beam and obtaining resource block allocation parameters comprises:
and for the target user equipment corresponding to each target beam, distributing resource blocks for the target user equipment based on a frequency division multiplexing rule according to the business data volume ratio of the target user equipment, and obtaining the resource block distribution parameters.
5. The multi-user device scheduling method of claim 1, wherein the single-user channel measurement comprises a downlink channel beam strength measurement; the method for respectively measuring the single-user channels of a plurality of user equipment accessing the base station to obtain the single-user channel information corresponding to each user equipment comprises the following steps:
and sequentially transmitting a plurality of beams to each user equipment to obtain the strength value fed back by the user equipment to different beams.
6. The method according to claim 1 or 5, wherein after the step of performing single user channel measurement on each of the plurality of ues accessing the base station to obtain single user channel information corresponding to each of the ues, the method further comprises: and constructing an intensity table, and logging the intensity table, wherein the intensity table comprises intensity values fed back by each user equipment to each beam.
7. The multi-user device scheduling method of claim 1, wherein the single-user channel information further comprises a channel quality of the user device and a correlation of each channel corresponding to the user device; the determining at least one candidate user equipment from the plurality of user equipments according to a preset multi-user equipment scheduling condition, and using the beam paired by the candidate user equipment as a candidate beam, includes:
determining at least one candidate user equipment from the plurality of user equipments according to the channel quality of the user equipment and the correlation of each channel corresponding to the user equipment, and taking the beam paired by the candidate user equipment as a candidate beam.
8. The method according to claim 1 or 7, wherein after the step of determining at least one candidate user equipment from a plurality of user equipments according to a preset multi-user equipment scheduling condition, and using the beam paired by the candidate user equipment as a first candidate beam, the method further comprises: and constructing a pairing table and recording the pairing table in a log, wherein the pairing table at least comprises the pairing relation of the beam and the user equipment and the pairing relation of the beam and the candidate user equipment.
9. The method of claim 1, wherein the determining the priority of the candidate ue and the priority of the first candidate beam according to the priority of the candidate ue comprises:
obtaining the priority of the candidate user equipment according to the service type of the candidate user equipment;
and performing weighted average on the priorities of the candidate user equipment corresponding to the first candidate beam to obtain the priority of the first candidate beam.
10. The method of claim 1, wherein the performing single user channel measurement on a plurality of user equipments accessing the base station to obtain single user channel information corresponding to each of the user equipments comprises:
and respectively carrying out uplink channel sounding reference signal measurement on a plurality of user equipment accessed to the base station to obtain uplink channel information corresponding to each user equipment.
11. The method according to claim 1 or 4, wherein the performing the multi-user equipment scheduling on the target user equipment according to the uplink channel information and the resource block allocation parameter comprises:
calibrating the uplink channel information corresponding to the target user;
according to the resource block allocation parameters, a plurality of second resource blocks are allocated to the resource blocks;
for each second resource block, calculating an analog-digital mixed pre-coding weight according to the calibrated uplink channel information;
and performing downlink multi-user scheduling on the target user according to a space division multiplexing rule according to the analog-digital mixed pre-coding weight value.
12. The method for scheduling multiple user equipments according to claim 11, further comprising, before the step of scheduling multiple user equipments to the target user equipment according to the uplink channel information:
acquiring the measurement time of the uplink channel information of the target user equipment;
obtaining a measurement time interval according to the measurement time and the current time;
and re-performing uplink channel sounding reference signal measurement on the target user equipment of which the measurement time interval exceeds the time interval threshold, and updating the uplink channel information.
13. A multi-user equipment scheduling apparatus applied to a base station, comprising:
a single-user channel measuring unit, configured to perform single-user channel measurement on multiple user equipments accessing the base station, respectively, to obtain single-user channel information corresponding to each user equipment, where the single-user channel information at least includes a strength value and uplink channel information fed back by the user equipment to a beam;
a pairing unit, configured to pair, for each user equipment, the user equipment with the beam corresponding to a maximum value in the intensity values according to the corresponding intensity value;
a first screening unit, configured to determine at least one candidate user equipment from multiple user equipments according to a preset multi-user equipment scheduling condition, and use the beam paired by the candidate user equipment as a first candidate beam;
a priority calculating unit, configured to determine a priority of the candidate user equipment, and determine a priority of the first candidate beam according to the priority of the candidate user equipment;
a second screening unit, configured to determine a target beam according to the priority of the first candidate beam, and determine a target user equipment corresponding to the target beam according to the priority of the candidate user equipment;
a resource block allocation unit, configured to perform resource block allocation for each target beam for the corresponding target ue, and obtain resource block allocation parameters;
and the scheduling unit is used for carrying out multi-user equipment scheduling on the target user equipment according to the uplink channel information and the resource block allocation parameters.
14. A base station, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the multi-user device scheduling method according to any of claims 1 to 12 when executing the computer program.
15. A computer-readable storage medium having stored thereon executable instructions that when executed by a processor implement the multi-user device scheduling method of any of claims 1 to 12.
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| KR101752824B1 (en) * | 2010-09-29 | 2017-06-30 | 삼성전자주식회사 | Method and apparatus for feedback in multi user-multiple input multiple output system |
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