CN110324886B - Uplink power control method and base station - Google Patents
Uplink power control method and base station Download PDFInfo
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- CN110324886B CN110324886B CN201810262532.0A CN201810262532A CN110324886B CN 110324886 B CN110324886 B CN 110324886B CN 201810262532 A CN201810262532 A CN 201810262532A CN 110324886 B CN110324886 B CN 110324886B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
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Abstract
The invention provides an uplink power control method and a base station, wherein the method comprises the following steps: receiving a PHR sent by user equipment, wherein the PHR comprises power headroom information of the user equipment in at least one carrier aggregation cluster; aiming at each carrier, acquiring the transmitting power of the user equipment on each carrier according to the PHR; determining a scheduling carrier set of the user equipment according to the transmitting power of the user equipment on each carrier and the maximum transmitting power of the user equipment, so that the sum of the transmitting powers of the carriers in the scheduling carrier set does not exceed the maximum transmitting power of the user equipment; and performing power control on the user equipment according to the scheduling carrier set. The uplink power control method and the base station provided by the invention realize the uplink power control function under the asymmetric uplink carrier aggregation scene, thereby reducing the interference between the user equipment and prolonging the service time of the battery of the user equipment.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an uplink power control method and a base station.
Background
In the current LTE system, a single carrier supports a system bandwidth of 20M at maximum, and if a larger bandwidth is to be supported, a carrier aggregation technique needs to be adopted. In the requirement of the common public network, the general downlink throughput is greater than the uplink throughput, so that in the general LTE standard, the symmetric carrier aggregation and the asymmetric downlink carrier aggregation are defined, and the number of downlink carriers is required to be greater than or equal to the number of uplink carriers, so that the requirement of the common public network can be met. But in some industry wireless communication networks, for example: in a network with a large amount of video monitoring services, the uplink throughput is required to be greater than the downlink throughput. At present, the carrier aggregation scheme defined in the general LTE standard cannot meet such requirements, and therefore, an asymmetric uplink carrier aggregation technology in which the number of uplink carriers is greater than that of downlink carriers needs to be adopted.
In general, in order to prolong the battery life of the user equipment and reduce the interference between the user equipments, the base station needs to control the power of the user equipment by using a power control method.
However, the existing power control method is only applicable to the scenarios of symmetric carrier aggregation and asymmetric downlink carrier aggregation defined in the LTE standard. In the asymmetric uplink carrier aggregation scenario, one ue may simultaneously operate on multiple uplink carriers, and currently, no corresponding power control method exists.
Disclosure of Invention
The invention provides an uplink power control method and a base station, which can realize the power control function of an asymmetric uplink carrier aggregation scene, thereby reducing the interference between user equipment and prolonging the service time of a battery of the user equipment.
In a first aspect, the present invention provides an uplink power control method, including:
receiving a Power Headroom Report (PHR) sent by user equipment, wherein the PHR comprises power headroom information of the user equipment in at least one carrier aggregation cluster, and each carrier aggregation cluster comprises a main carrier and at least one supplementary uplink SUL auxiliary carrier;
for each carrier in the at least one carrier aggregation cluster, acquiring the transmission power of the user equipment on each carrier according to the PHR;
determining a scheduling carrier set of the user equipment according to the transmitting power of the user equipment on each carrier and the maximum transmitting power of the user equipment, so that the sum of the transmitting powers of the carriers in the scheduling carrier set does not exceed the maximum transmitting power of the user equipment;
and performing power control on the user equipment according to the scheduling carrier set.
Optionally, the determining a scheduling carrier set of the ue according to the transmit power of the ue in each carrier and the maximum transmit power of the ue includes:
and determining a scheduling carrier set of the user equipment according to the transmitting power of the user equipment on each carrier, the maximum transmitting power of the user equipment, and the signal quality and/or the service quality of each carrier.
Optionally, the determining a scheduling carrier set of the user equipment according to the transmission power of the user equipment on each carrier, the maximum transmission power of the user equipment, and the signal quality and/or the service quality of each carrier includes:
sorting the carriers of the at least one carrier aggregation cluster according to the signal quality and/or the service quality to obtain a sorted carrier sequence;
and sequentially accumulating the transmitting power of the carriers according to the sequence of the carriers in the carrier sequence until the sum of the accumulated transmitting power exceeds the maximum transmitting power of the user equipment, and adding the accumulated carriers into a scheduling carrier set.
Optionally, the signal quality includes a signal-to-noise ratio parameter;
the service quality comprises a packet loss rate parameter and a service delay parameter.
Optionally, the obtaining, according to the PHR, the transmit power of the ue on each carrier includes:
acquiring the power spectral density of the user equipment on the carrier according to the PHR;
determining a target number of resource blocks, RBs, scheduled for the user equipment on the carrier;
and acquiring the transmitting power of the user equipment on the carrier according to the power spectral density and the target RB number.
Optionally, the determining a target number of RBs scheduled on the carrier for the user equipment includes:
determining a first candidate RB number scheduled by the user equipment on the carrier according to the maximum transmitting power of the user equipment;
determining a second candidate RB number scheduled by the user equipment on the carrier according to the data volume to be transmitted by the user equipment;
determining the first number of candidate RBs as a target number of RBs if the first number of candidate RBs is less than the second number of candidate RBs, otherwise determining the second number of candidate RBs as the target number of RBs.
Optionally, before determining the scheduling carrier set of the user equipment according to the transmission power of the user equipment on each carrier and the maximum transmission power of the user equipment, the method further includes:
receiving uplink signal-to-noise ratio information sent by the user equipment, wherein the uplink signal-to-noise ratio information comprises the signal-to-noise ratio parameter measured by the user equipment on the carrier of the at least one carrier aggregation cluster.
In a second aspect, the present invention provides a base station, comprising:
a receiving module, configured to receive a power headroom report PHR sent by a user equipment, where the PHR includes power headroom information of the user equipment in at least one carrier aggregation cluster, and each carrier aggregation cluster includes a primary carrier and at least one supplemental uplink SUL secondary carrier;
a power obtaining module, configured to obtain, for each carrier in the at least one carrier aggregation cluster, a transmit power of the ue on each carrier according to the PHR;
a determining module, configured to determine a scheduling carrier set of the ue according to the transmit power of the ue in each carrier and the maximum transmit power of the ue, so that the sum of the transmit powers of the carriers in the scheduling carrier set does not exceed the maximum transmit power of the ue;
and the power control module is used for controlling the power of the user equipment according to the scheduling carrier set.
Optionally, the determining module is specifically configured to determine the scheduling carrier set of the user equipment according to the transmission power of the user equipment in each carrier, the maximum transmission power of the user equipment, and the signal quality and/or the service quality of each carrier.
Optionally, the determining module is specifically configured to rank the carriers of the at least one carrier aggregation cluster according to the signal quality and/or the service quality, so as to obtain a ranked carrier sequence;
and sequentially accumulating the transmitting power of the carriers according to the sequence of the carriers in the carrier sequence until the sum of the accumulated transmitting power exceeds the maximum transmitting power of the user equipment, and adding the accumulated carriers into a scheduling carrier set.
Optionally, the signal quality includes a signal-to-noise ratio parameter;
the service quality comprises a packet loss rate parameter and a service delay parameter.
Optionally, the power obtaining module is specifically configured to obtain, according to the PHR, a power spectral density of the carrier of the ue;
determining a target number of resource blocks, RBs, scheduled for the user equipment on the carrier;
and acquiring the transmitting power of the user equipment on the carrier according to the power spectral density and the target RB number.
Optionally, the power obtaining module is specifically configured to determine, according to the maximum transmission power of the ue, a first number of candidate RBs scheduled by the ue on the carrier;
determining a second candidate RB number scheduled by the user equipment on the carrier according to the data volume to be transmitted by the user equipment;
determining the first number of candidate RBs as a target number of RBs if the first number of candidate RBs is less than the second number of candidate RBs, otherwise determining the second number of candidate RBs as the target number of RBs.
Optionally, the receiving module is further configured to receive uplink signal-to-noise ratio information sent by the user equipment, where the uplink signal-to-noise ratio information includes the signal-to-noise ratio parameter measured by the user equipment on a carrier of the at least one carrier aggregation cluster.
In a third aspect, the present invention provides a base station, including:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any of the first aspects.
In a fourth aspect, the present invention provides a computer readable storage medium having a computer program stored thereon; the computer program is executed by a processor to implement the method according to any of the first aspect.
The invention provides an uplink power control method and a base station, wherein the method comprises the following steps: receiving a PHR sent by user equipment, wherein the PHR comprises power headroom information of the user equipment in at least one carrier aggregation cluster; for each carrier in the at least one carrier aggregation cluster, acquiring the transmission power of the user equipment on each carrier according to the PHR; determining a scheduling carrier set of the user equipment according to the transmitting power of the user equipment on each carrier and the maximum transmitting power of the user equipment, so that the sum of the transmitting powers of the carriers in the scheduling carrier set does not exceed the maximum transmitting power of the user equipment; and performing power control on the user equipment according to the scheduling carrier set. The uplink power control method and the base station provided by the invention ensure that the sum of the transmitting power of a plurality of uplink carriers of the user equipment does not exceed the maximum transmitting power of the user equipment when the scheduling carrier set is determined, so that the method can be suitable for an asymmetric uplink carrier aggregation scene, namely, the uplink power control function under the asymmetric uplink carrier aggregation scene is realized, thereby reducing the interference among the user equipment and prolonging the service time of a battery of the user equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic carrier diagram configured by a base station for a certain ue;
fig. 2 is a schematic diagram of packet status of asymmetric uplink carrier aggregation;
fig. 3 is a flowchart of a first embodiment of an uplink power control method according to the present invention;
fig. 4 is a flowchart of a second embodiment of an uplink power control method according to the present invention;
fig. 5 is a flowchart for obtaining the transmission power of the ue on each carrier;
fig. 6 is a flow chart of determining a set of scheduled carriers for a user equipment;
fig. 7 is a schematic structural diagram of a base station according to a first embodiment of the present invention;
fig. 8 is a schematic structural diagram of a second base station according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the current LTE system, a single carrier supports a system bandwidth of 20M at maximum, and if a larger bandwidth is to be supported, a carrier aggregation technique needs to be adopted. In the requirement of the common public network, the general downlink throughput is greater than the uplink throughput, so that in the general LTE standard, the symmetric carrier aggregation and the asymmetric downlink carrier aggregation are defined, and the number of downlink carriers is required to be greater than or equal to the number of uplink carriers, so that the requirement of the common public network can be met. But in some industry wireless communication networks, for example: in a network with a large amount of video monitoring services, the uplink throughput is required to be greater than the downlink throughput. At present, the carrier aggregation scheme defined in the general LTE standard cannot meet such requirements, and therefore, an asymmetric uplink carrier aggregation technology in which the number of uplink carriers is greater than that of downlink carriers needs to be adopted.
Generally, in order to prolong the battery life of the user equipment and reduce the interference between the user equipments, the base station needs to control the power of the user equipment by using a control method.
However, the existing power control method is only applicable to the scenarios of symmetric carrier aggregation and asymmetric downlink carrier aggregation defined in the LTE standard. In the asymmetric uplink carrier aggregation scenario, one ue may simultaneously operate on multiple uplink carriers, and currently, no corresponding power control method exists.
The uplink power control method and the base station provided by the invention can realize the uplink power control function under the asymmetric uplink carrier aggregation scene, thereby reducing the interference between the user equipment and prolonging the service time of the battery of the user equipment.
First, an implementation of asymmetric uplink carrier aggregation is described. Fig. 1 is a schematic carrier diagram configured by a base station for a certain ue, and as shown in fig. 1, it is assumed that the number of uplink carriers configured for the ue is M, the number of downlink carriers is N, and M > N, where M and N are integers greater than or equal to 1. Fig. 2 is a schematic diagram of an asymmetric uplink carrier aggregation grouping state, and as shown in fig. 2, when asymmetric uplink carrier aggregation is performed, M uplink carriers and N downlink carriers are decomposed into N carrier aggregation clusters, each carrier aggregation cluster includes one downlink carrier and K uplink carriers, and K is an integer greater than or equal to 1. In each carrier aggregation cluster, a downlink carrier and one UpLink carrier corresponding to the downlink carrier form an FDD primary carrier, and the other UpLink carriers are defined as Supplemental UpLink (SUL) secondary carriers.
It should be noted that the uplink power control method and the base station provided by the present invention can be used in the uplink power control process in the asymmetric uplink carrier aggregation scenario as shown in fig. 2.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 3 is a flowchart of a first embodiment of the uplink power control method provided in the present invention, and an execution subject of the method of this embodiment may be a base station. As shown in fig. 3, the method of the present embodiment includes:
s11: receiving a Power Headroom Report (PHR) sent by user equipment, wherein the PHR comprises power headroom information of the user equipment in at least one carrier aggregation cluster, and each carrier aggregation cluster comprises a main carrier and at least one supplementary uplink SUL auxiliary carrier.
Specifically, the base station configures at least one carrier aggregation cluster, for example, two carrier aggregation clusters, for the user equipment, where each carrier aggregation cluster includes one primary carrier and at least one SUL secondary carrier, where the primary carrier may be an FDD primary carrier as shown in fig. 2. And the user equipment sends PHR to the base station, wherein the PHR comprises the power headroom information of all uplink carriers of the user equipment in the at least one carrier aggregation cluster.
Optionally, for one of the uplink carriers, the power headroom information may be obtained according to the maximum transmission power of the ue and the actual transmission power of the carrier, for example, the power headroom information of the carrier is obtained by subtracting the actual transmission power of the carrier from the maximum transmission power of the ue.
Optionally, for one of the uplink carriers, the power headroom information may also be obtained according to the maximum transmission power configured for the carrier by the base station and the actual transmission power of the carrier, for example, the power headroom information of the carrier is obtained by subtracting the actual transmission power of the carrier from the maximum transmission power configured for the carrier by the base station.
It should be noted that, the present invention is not limited to the specific manner in which the user equipment transmits the PHR, for example, one optional manner is that the user equipment may transmit the PHR on all uplink carriers, and each PHR includes power headroom information of the corresponding carrier; another optional mode is that the user equipment may report the PHR according to the carrier aggregation cluster, for example, the PHR is sent only on the main carrier of each carrier aggregation cluster, or only on one SUL auxiliary carrier, where the PHR includes power headroom information of all uplink carriers in the carrier aggregation cluster; in another alternative, the ue only transmits a PHR on one of all uplink carriers, where the PHR includes power headroom information of all uplink carriers.
S12: and aiming at each carrier in the at least one carrier aggregation cluster, acquiring the transmitting power of the user equipment on each carrier according to the PHR.
Specifically, after receiving the PHR sent by the ue, the base station may obtain power headroom information of the ue on each uplink carrier, and the base station determines a power adjustment amount for each carrier of the ue according to the power headroom information and a channel condition of each carrier, so as to obtain a transmit power of the ue on each carrier.
S13: and determining a scheduling carrier set of the user equipment according to the transmitting power of the user equipment on each carrier and the maximum transmitting power of the user equipment, so that the sum of the transmitting powers of the carriers in the scheduling carrier set does not exceed the maximum transmitting power of the user equipment.
Specifically, in an asymmetric uplink carrier aggregation scenario, the ue may simultaneously operate on multiple uplink carriers, and in order to avoid service performance degradation, it needs to be ensured that the sum of the transmit powers of the ue on all scheduled carriers cannot exceed the maximum transmit power of the ue. Therefore, the base station needs to determine the scheduling carrier set of the ue according to the transmit power of the ue in each carrier and the maximum transmit power of the ue, so that the sum of the transmit powers of the carriers in the scheduling carrier set does not exceed the maximum transmit power of the ue.
The carriers in the scheduling carrier set are carriers scheduled by the base station for the user equipment at the next uplink transmission time, and there are multiple methods for determining the scheduling carrier set, where an optional implementation manner is to sequentially select a preset number of carriers from the carriers in the at least one carrier aggregation cluster, make the sum of the transmission powers of the selected carriers not exceed the maximum transmission power of the user equipment, and add the selected carriers to the scheduling carrier set.
S14: and performing power control on the user equipment according to the scheduling carrier set.
Specifically, when the base station performs carrier scheduling on the ue, the base station selects a carrier in the scheduling carrier set for scheduling, and carries a Power adjustment parameter for the scheduling carrier in the scheduling parameter, for example, a Power adjustment amount based on a Modulation and Coding Scheme (MCS) and a Power adjustment amount based on a Power Control command (TPC), so as to implement Power Control on the ue at the next uplink Transmission time.
In this embodiment, a base station receives a PHR sent by a user equipment, where the PHR includes power headroom information of the user equipment in at least one carrier aggregation cluster; for each carrier in the at least one carrier aggregation cluster, acquiring the transmission power of the user equipment on each carrier according to the PHR; determining a scheduling carrier set of the user equipment according to the transmitting power of the user equipment on each carrier and the maximum transmitting power of the user equipment, so that the sum of the transmitting powers of the carriers in the scheduling carrier set does not exceed the maximum transmitting power of the user equipment; and performing power control on the user equipment according to the scheduling carrier set. When the scheduling carrier set is determined, the sum of the transmitting power of a plurality of uplink carriers of the user equipment is ensured not to exceed the maximum transmitting power of the user equipment, so that the method can be suitable for an asymmetric uplink carrier aggregation scene, namely, the uplink power control function under the asymmetric uplink carrier aggregation scene is realized, the interference among the user equipment can be reduced, and the service time of a battery of the user equipment is prolonged.
Fig. 4 is a flowchart of a second embodiment of the uplink power control method provided in the present invention, and on the basis of the above embodiments, this embodiment respectively describes in detail optional implementation manners of each step in the first embodiment. As shown in fig. 4, the method of the present embodiment includes:
s21: receiving a Power Headroom Report (PHR) sent by user equipment, wherein the PHR comprises power headroom information of the user equipment in at least one carrier aggregation cluster, and each carrier aggregation cluster comprises a main carrier and at least one supplementary uplink SUL auxiliary carrier.
When the user equipment obtains the power headroom of each carrier in the at least one carrier aggregation cluster, firstly, the expected transmission power of the user equipment is calculated according to the power adjustment parameter issued by the base station, and then the expected transmission power is subtracted from the maximum transmission power of the user equipment to obtain the power headroom of the user equipment on the carrier. The method for calculating the expected transmission power by the user equipment includes, but is not limited to, the following modes:
if the user equipment only sends PUSCH on the carrier wave, acquiring the transmitting power of the carrier wave according to the following formula:
wherein, Ppusch(i, j) is the transmission power of the user equipment in the j sub-frame of the ith carrier wave, PcmaxIs the maximum transmission power, M, of the user equipmentpusch(i, j) the number of RBs, P, allocated by the base station to the user equipment in the jth sub-frame of the ith carrier0_pusch(i, j) is a target power configured by the base station for the user equipment in the jth subframe of the ith carrier, α (i, j) is a path loss compensation coefficient configured by the base station for the user equipment in the jth subframe of the ith carrier, PL is a downlink path loss measured by the user equipment, and Δ isTF(i, j) is the MCS-based power offset of the user equipment in the jth subframe of the ith carrier, and f (i, j) is the TPC command-based dynamic power adjustment quantity of the user equipment in the jth subframe of the ith carrier.
If the user equipment simultaneously transmits PUSCH and PUCCH on the carrier wave, the transmission power of the carrier wave is obtained according to the following formula:
wherein, Ppusch(i, j) is the transmission power of the user equipment in the j sub-frame of the ith carrier,
is a linear value of the maximum transmit power of the user equipment,
linear value, M, of PUCCH transmission power of the user equipment in the jth subframe of the ith carrierpusch(i, j) the number of RBs, P, allocated by the base station to the user equipment in the jth sub-frame of the ith carrier0_pusch(i, j) is the target power configured by the base station for the user equipment in the jth subframe of the ith carrier, and α (i, j) is the path loss compensation system configured by the base station for the user equipment in the jth subframe of the ith carrierNumber, PL is downlink path loss, Delta measured by the user equipmentTF(i, j) is the MCS-based power offset of the user equipment in the jth subframe of the ith carrier, and f (i, j) is the TPC command-based dynamic power adjustment quantity of the user equipment in the jth subframe of the ith carrier.
S22: and aiming at each carrier in the at least one carrier aggregation cluster, acquiring the transmitting power of the user equipment on each carrier according to the PHR.
Specifically, fig. 5 is a flowchart of obtaining the transmit power of the ue on each carrier, which shows an alternative implementation of S22, and as shown in fig. 5, the method includes:
s221: and acquiring the power spectral density of the user equipment on the carrier according to the PHR.
Specifically, after receiving the PHR, the base station may obtain the current transmit power of the ue on the carrier according to the power headroom information of the ue on the carrier and the maximum transmit power of the ue, and may obtain the power spectral density of the ue on the carrier according to the current transmit power. It should be noted that the method for acquiring the power spectral density is not limited in the present invention, and the method in the prior art may be adopted.
S222: determining a target number of resource blocks, RBs, scheduled for the user equipment on the carrier.
Specifically, the base station may determine, according to the signal quality of the carrier, the transmission power condition of the carrier, the maximum transmission power of the user equipment, and/or the data amount condition to be transmitted by the user equipment, the number of RBs scheduled by the user equipment on the carrier.
In an optional implementation manner, according to the maximum transmission power of the user equipment, determining a first number of candidate RBs scheduled for the user equipment on the carrier; determining a second candidate RB number scheduled by the user equipment on the carrier according to the data volume to be transmitted by the user equipment; determining the first number of candidate RBs as a target number of RBs if the first number of candidate RBs is less than the second number of candidate RBs, otherwise determining the second number of candidate RBs as the target number of RBs.
S223: and acquiring the transmitting power of the user equipment on the carrier according to the power spectral density and the target RB number.
Specifically, the power spectral density is multiplied by the target RB number to obtain the transmit power of the ue on the carrier.
S23: and determining a scheduling carrier set of the user equipment according to the transmitting power of the user equipment on each carrier, the maximum transmitting power of the user equipment, and the signal quality and/or the service quality of each carrier.
Specifically, in all carriers of the at least one carrier aggregation cluster, carriers with better signal quality and/or service quality are selected to be added into the scheduling carrier set, and the requirement that the sum of the powers of all carriers in the scheduling carrier set does not exceed the maximum transmission power of the user equipment is met.
Fig. 6 is a flowchart of determining a scheduled carrier set of a user equipment, which illustrates an alternative embodiment of determining the scheduled carrier set by a base station. As shown in fig. 6, includes:
s231: and sequencing the carriers of the at least one carrier aggregation cluster according to the signal quality and/or the service quality to obtain a sequenced carrier sequence.
S232: and sequentially accumulating the transmitting power of the carriers according to the sequence of the carriers in the carrier sequence until the sum of the accumulated transmitting power exceeds the maximum transmitting power of the user equipment, and adding the accumulated carriers into a scheduling carrier set.
It will be appreciated that suitable parameters may be selected to characterize signal quality and/or quality of service, optionally including signal-to-noise parameters, according to the specific requirements of the actual network; the service quality comprises packet loss rate and service delay parameters.
Optionally, S23 is preceded by: receiving uplink signal-to-noise ratio information sent by the user equipment, wherein the uplink signal-to-noise ratio information comprises the signal-to-noise ratio parameter measured by the user equipment on the carrier of the at least one carrier aggregation cluster.
Specifically, the base station obtains the signal-to-noise ratio parameter measured by the user equipment on the uplink carrier, when the scheduling carrier set is determined, the uplink carrier may be sorted according to the signal-to-noise ratio parameter, then the transmission power of the carriers is sequentially accumulated according to the order of the sorted carriers, if the sum of the obtained transmission power of a certain carrier exceeds the maximum transmission power of the user equipment after the transmission power of the certain carrier is accumulated, the carrier accumulated before the carrier is added into the scheduling carrier set, and the carrier and the subsequent carriers do not participate in accumulation any more.
It can be understood that, when determining the scheduling carrier set, the signal-to-noise ratio parameter of the carrier is also considered, so that the carrier scheduled by the base station to the user equipment is a carrier with a higher signal-to-noise ratio, and the performance of the network can be improved while the power control function is realized.
Fig. 7 is a schematic structural diagram of a first embodiment of a base station, as shown in fig. 7, a base station 100 of this embodiment includes: a receiving module 101, a power obtaining module 102, a determining module 103 and a power control module 104.
A receiving module 101, configured to receive a power headroom report PHR sent by a user equipment, where the PHR includes power headroom information of the user equipment in at least one carrier aggregation cluster, and each carrier aggregation cluster includes a main carrier and at least one supplemental uplink SUL secondary carrier.
A power obtaining module 102, configured to obtain, for each carrier in the at least one carrier aggregation cluster, a transmit power of the ue on each carrier according to the PHR.
A determining module 103, configured to determine a scheduling carrier set of the user equipment according to the transmit power of the user equipment in each carrier and the maximum transmit power of the user equipment, so that the sum of the transmit powers of the carriers in the scheduling carrier set does not exceed the maximum transmit power of the user equipment.
A power control module 104, configured to perform power control on the ue according to the scheduling carrier set.
Optionally, the determining module 103 is specifically configured to determine the scheduling carrier set of the user equipment according to the transmission power of the user equipment in each carrier, the maximum transmission power of the user equipment, and the signal quality and/or the service quality of each carrier.
Optionally, the determining module 103 is specifically configured to rank the carriers of the at least one carrier aggregation cluster according to the signal quality and/or the service quality, so as to obtain a ranked carrier sequence; and sequentially accumulating the transmitting power of the carriers according to the sequence of the carriers in the carrier sequence until the sum of the accumulated transmitting power exceeds the maximum transmitting power of the user equipment, and adding the accumulated carriers into a scheduling carrier set.
Optionally, the signal quality includes a signal-to-noise ratio parameter; the service quality comprises a packet loss rate parameter and a service delay parameter.
Optionally, the power obtaining module 102 is specifically configured to obtain, according to the PHR, a power spectral density of the carrier of the ue; determining a target number of resource blocks, RBs, scheduled for the user equipment on the carrier; and acquiring the transmitting power of the user equipment on the carrier according to the power spectral density and the target RB number.
Optionally, the power obtaining module 102 is specifically configured to determine, according to the maximum transmission power of the ue, a first number of candidate RBs scheduled by the ue on the carrier; determining a second candidate RB number scheduled by the user equipment on the carrier according to the data volume to be transmitted by the user equipment; determining the first number of candidate RBs as a target number of RBs if the first number of candidate RBs is less than the second number of candidate RBs, otherwise determining the second number of candidate RBs as the target number of RBs.
The receiving module 101 is further configured to receive uplink signal-to-noise ratio information sent by the user equipment, where the uplink signal-to-noise ratio information includes the signal-to-noise ratio parameter measured by the user equipment on a carrier of the at least one carrier aggregation cluster.
The base station 100 of this embodiment may execute the technical solution of the uplink power control method in any of the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 8 is a schematic structural diagram of a second embodiment of a base station provided in the present invention, and as shown in fig. 8, the base station 200 of the present embodiment includes: a memory 201, a processor 202, and a computer program, where the computer program is stored in the memory and configured to be executed by the processor to implement the technical solution of the uplink power control method according to any of the above method embodiments, and the implementation principle and the technical effect are similar, and are not described herein again.
The present invention also provides a computer-readable storage medium having stored thereon a computer program; the computer program is executed by the processor to implement the technical solution of the uplink power control method in any of the above method embodiments, and the implementation principle and technical effect are similar, and are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An uplink power control method, comprising:
receiving a Power Headroom Report (PHR) sent by user equipment, wherein the PHR comprises power headroom information of the user equipment in at least one carrier aggregation cluster, and each carrier aggregation cluster comprises a main carrier and at least one supplementary uplink SUL auxiliary carrier;
for each carrier in the at least one carrier aggregation cluster, acquiring the transmission power of the user equipment on each carrier according to the PHR, wherein the transmission power is the target transmission power of the user equipment at the next uplink transmission time;
determining a scheduling carrier set of the user equipment according to the transmitting power of the user equipment on each carrier, the maximum transmitting power of the user equipment, and the signal quality and/or the service quality of each carrier, so that the sum of the transmitting powers of the carriers in the scheduling carrier set does not exceed the maximum transmitting power of the user equipment;
and performing power control on the user equipment according to the scheduling carrier set.
2. The method of claim 1,
determining a scheduling carrier set of the ue according to the transmit power of the ue on each carrier, the maximum transmit power of the ue, and the signal quality and/or service quality of each carrier, including:
sorting the carriers of the at least one carrier aggregation cluster according to the signal quality and/or the service quality to obtain a sorted carrier sequence;
and sequentially accumulating the transmitting power of the carriers according to the sequence of the carriers in the carrier sequence until the sum of the accumulated transmitting power exceeds the maximum transmitting power of the user equipment, and adding the accumulated carriers into a scheduling carrier set.
3. The method according to claim 1 or 2,
the signal quality comprises a signal-to-noise ratio parameter;
the service quality comprises a packet loss rate parameter and a service delay parameter.
4. The method of claim 3,
the obtaining, according to the PHR, the transmit power of the ue on each carrier includes:
acquiring the power spectral density of the user equipment on the carrier according to the PHR;
determining a target number of resource blocks, RBs, scheduled for the user equipment on the carrier;
and acquiring the transmitting power of the user equipment on the carrier according to the power spectral density and the target RB number.
5. The method of claim 4,
the determining a target number of RBs scheduled for the user equipment on the carrier comprises:
determining a first candidate RB number scheduled by the user equipment on the carrier according to the maximum transmitting power of the user equipment;
determining a second candidate RB number scheduled by the user equipment on the carrier according to the data volume to be transmitted by the user equipment;
determining the first number of candidate RBs as a target number of RBs if the first number of candidate RBs is less than the second number of candidate RBs, otherwise determining the second number of candidate RBs as the target number of RBs.
6. The method of claim 3,
before determining the scheduling carrier set of the user equipment according to the transmission power of the user equipment on each carrier, the maximum transmission power of the user equipment, and the signal quality and/or the service quality of each carrier, the method further includes:
receiving uplink signal-to-noise ratio information sent by the user equipment, wherein the uplink signal-to-noise ratio information comprises the signal-to-noise ratio parameter measured by the user equipment on the carrier of the at least one carrier aggregation cluster.
7. A base station, comprising:
a receiving module, configured to receive a power headroom report PHR sent by a user equipment, where the PHR includes power headroom information of the user equipment in at least one carrier aggregation cluster, and each carrier aggregation cluster includes a primary carrier and at least one supplemental uplink SUL secondary carrier;
a power obtaining module, configured to obtain, for each carrier in the at least one carrier aggregation cluster, a transmit power of the ue in each carrier according to the PHR, where the transmit power is a target transmit power of the ue at a next uplink transmission time;
a determining module, configured to determine a scheduling carrier set of the ue according to the transmit power of the ue on each carrier, the maximum transmit power of the ue, and the signal quality and/or service quality of each carrier, so that the sum of the transmit powers of carriers in the scheduling carrier set does not exceed the maximum transmit power of the ue;
and the power control module is used for controlling the power of the user equipment according to the scheduling carrier set.
8. A base station, comprising:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any one of claims 1-6.
9. A computer-readable storage medium, having stored thereon a computer program;
the computer program is executed by a processor to implement the method of any one of claims 1-6.
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| WO2022041028A1 (en) * | 2020-08-27 | 2022-03-03 | Qualcomm Incorporated | Multiple supplemental uplink (sul) carriers |
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