CN108811065B - Method and device for adjusting transmission power of almost blank subframe and computer equipment - Google Patents
Method and device for adjusting transmission power of almost blank subframe and computer equipment Download PDFInfo
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- CN108811065B CN108811065B CN201810522367.8A CN201810522367A CN108811065B CN 108811065 B CN108811065 B CN 108811065B CN 201810522367 A CN201810522367 A CN 201810522367A CN 108811065 B CN108811065 B CN 108811065B
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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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/283—Power depending on the position of the mobile
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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
- H04W52/18—TPC being performed according to specific parameters
Abstract
The application relates to a method, a system, a computer device and a storage medium for adjusting transmission power of almost blank subframes. The method comprises the following steps: acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information; judging the strong and weak coverage range of the position of the micro station according to the position indication information; and if the position of the micro station is judged to be in the weak coverage range, adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment. By adopting the method, the influence of unnecessary transmission power adjustment on the performance of the micro station can be avoided, and the transmission power of the almost blank subframe is adjusted by combining the resource utilization rate of the almost blank subframe and the measurement information of the user equipment, so that the transmission power of the almost blank subframe is adjusted more accurately, and the resource utilization rate of the system is effectively improved.
Description
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for adjusting transmission power of an almost blank subframe, a computer device, and a storage medium.
Background
In order to effectively solve the problems of coverage increase and distribution of a macro station in indoor and hot-spot scenes, an LTE (Long Term Evolution) network introduces LPNs (Low Power nodes) in the coverage of the macro station to form a multi-layer network with the same coverage composed of different types of nodes, and the industry refers to such a network as a HetNet (Heterogeneous network). The LPNs include Pico cells (Pico cells), home base stations (Femto cells), and Relay nodes (Relay nodes), and may also be referred to as micro stations.
In a heterogeneous network, an edge User of a micro station often suffers from severe co-Channel Interference, which causes index deterioration of mobility, access performance, and the like, and in order to reduce influence of the co-Channel Interference on system performance of the micro station, an existing mature Inter-Cell Interference Coordination method applied in a macro-micro heterogeneous network is Enhanced Inter-Cell Interference Coordination (elcic), and the method configures an Almost Blank Subframe (ABS) pattern through a macro station, so that the macro station reduces power transmission or does not transmit on some Physical channels of the Almost Blank subframes, and thus Interference on a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH) of a User Equipment (edge User Equipment) of the micro station can be avoided. However, in practical applications, when the macro station does not transmit on the almost blank subframes or performs data transmission by using a low transmission power, the macro station often wastes transmission resources of the almost blank subframes.
Disclosure of Invention
Based on this, it is necessary to provide a method, an apparatus, a computer device and a storage medium for adjusting transmission power of an almost blank subframe, aiming at the technical problem that in the conventional cell interference coordination method, a macro station does not transmit on the almost blank subframe or performs data transmission in a low transmission power manner, which results in waste of transmission resources.
A method for adjusting the transmission power of an almost blank subframe comprises the following steps:
acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information;
judging the strong and weak coverage range of the position of the micro station according to the position indication information;
and if the position of the micro station is judged to be in the weak coverage range, adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
In one embodiment, after the step of determining the strong and weak coverage of the position where the micro station is located according to the position indication information, the method further includes the following steps:
and if the position of the micro station is judged to be in the strong coverage range, adjusting the transmitting power of the macro station on the almost blank subframe to be zero.
In one embodiment, the position indication information comprises a spacing value from the macro station to the micro station;
the step of judging the strong and weak coverage range of the position where the micro station is located according to the position indication information comprises the following steps:
if the distance value is larger than a preset distance threshold value, judging that the position of the micro station is in a weak coverage range;
and if the distance value is smaller than or equal to the preset distance threshold value, judging that the position of the micro station is in a strong coverage range.
In one embodiment, the position indication information comprises a first receiving power of the micro station for receiving a macro station reference signal;
the step of judging the strong and weak coverage range of the position where the micro station is located according to the position indication information comprises the following steps:
if the first receiving power is smaller than a preset reference signal receiving power threshold value, judging that the position of the micro station is in a weak coverage range;
and if the first receiving power is greater than or equal to the preset reference signal receiving power threshold value, judging that the position of the micro station is in a strong coverage range.
In one embodiment, the step of adjusting the transmit power of the macro station on the almost blank subframes according to the resource utilization of the almost blank subframes and the measurement information of the user equipment comprises the following steps:
if the resource utilization rate of the almost blank subframe is greater than or equal to a preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe to be zero;
and if the resource utilization rate of the almost blank subframe is less than the preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe according to the user equipment measurement information.
In one embodiment, the ue measurement information includes a second receive power of each ue for receiving the macro bs reference signal and a third receive power of each ue for receiving the micro bs reference signal;
the step of adjusting the transmitting power of the macro station on the almost blank subframe according to the user equipment measurement information comprises the following steps:
acquiring first average power of the user equipment for receiving the reference signal of the macro station according to the second received power;
acquiring second average power of the user equipment for receiving the micro station reference signal according to the third received power;
and calculating the transmitting power of the macro station on the almost blank subframe according to the reference signal transmitting power of the macro station, the reference signal transmitting power of the micro station, the first average power, the second average power, the transmitting power of the micro station on the almost blank subframe and a receiving power difference threshold.
In one embodiment, the step of calculating the transmit power of the macro station on the almost blank subframe according to the reference signal transmit power of the macro station, the reference signal transmit power of the micro station, the first average power, the second average power, the transmit power of the micro station on the almost blank subframe, and a receive power difference threshold comprises the following steps:
according to Pmacro＝Ppico+((CRSmacro-RSRPmacro)-(CRSpico-RSRPpico) - Δ calculating the transmit power of the macro station on the almost blank subframes;
wherein, PmacroRepresenting a transmit power of the macro station on the almost blank subframe; ppicoRepresenting a transmit power of the micro station on the almost blank subframe; CRSmacroA reference signal transmit power representative of the macro station; CRSpicoRepresenting a reference signal transmit power of the micro station; RSRPmacroRepresenting the first average power; RSRPpicoRepresenting the second average power; delta represents a receive power difference threshold.
An apparatus for adjusting transmission power of almost blank subframes, comprising:
the system comprises an information acquisition module, a position acquisition module and a resource allocation module, wherein the information acquisition module is used for acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information;
the coverage area judging module is used for judging the strong and weak coverage area of the position where the micro station is located according to the position indication information;
and the transmitting power adjusting module is used for adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the user equipment measurement information when the position of the micro station is judged to be in the weak coverage range.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information;
judging the strong and weak coverage range of the position of the micro station according to the position indication information;
and if the position of the micro station is judged to be in the weak coverage range, adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information;
judging the strong and weak coverage range of the position of the micro station according to the position indication information;
and if the position of the micro station is judged to be in the weak coverage range, adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
According to the method, the device, the computer equipment and the storage medium for adjusting the almost blank subframe transmitting power, the macro station adjusts the transmitting power of the almost blank subframe by combining the acquired position indication information of the micro station, the almost blank subframe resource utilization rate and the user equipment measurement information, and only adjusts the transmitting power of the almost blank subframe when the position of the micro station is in the weak coverage range of the macro station, so that the influence of unnecessary transmitting power adjustment on the performance of the micro station is avoided, and the almost blank subframe transmitting power is adjusted by combining the almost blank subframe resource utilization rate and the user equipment measurement information, so that the adjustment of the almost blank subframe transmitting power is more accurate, and the resource utilization rate of a system is effectively improved under the condition that the interference of the micro station is not generated.
Drawings
FIG. 1 is a diagram of an application environment of a method for adjusting transmission power of almost blank subframes in an embodiment of the present invention;
FIG. 2 is a timing diagram illustrating communication between a macro station and a micro station in accordance with an embodiment of the present invention;
FIG. 3 is a flow chart of a method for adjusting transmission power of almost blank subframes in an embodiment of the invention;
FIG. 4 is a flowchart of the method steps for adjusting the transmit power of almost blank subframes in another embodiment of the present invention;
FIG. 5 is a diagram of an almost blank subframe pattern according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating an apparatus for adjusting transmission power of almost blank subframes in an embodiment of the present invention;
fig. 7 is an internal structural view of a computer device in one embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further 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 present application and are not intended to limit the present application.
The method for adjusting the transmission power of the almost blank subframe can be applied to the application environment shown in fig. 1. The macro base station 110 is an interference source base station; the micro station 120 is an interfered base station, and may be a pico cell, a home base station, a relay node, and the like; as shown in fig. 2, the macro base station 110 sends an almost blank subframe pattern to the micro station 120, where the almost blank subframe pattern is used to indicate which subframes are almost blank subframes in an almost blank subframe period, the micro station performs resource scheduling according to the almost blank subframe pattern, collects resource utilization rate of the almost blank subframes and user equipment measurement information and feeds back the resource utilization rate and the user equipment measurement information to the macro station 110, and the macro station 110 adjusts transmission power on the almost blank subframes according to the position information of the micro station, the resource utilization rate of the almost blank subframes and the user equipment measurement information.
Referring to fig. 3, fig. 3 is a flowchart of a method for adjusting almost blank subframe transmission power according to an embodiment of the present invention, and this embodiment provides a method for adjusting almost blank subframe transmission power, which is described with reference to fig. 1 as an example and includes the following steps:
step S310: and acquiring the position indication information of the micro station, the resource utilization rate of the almost blank subframe fed back by the micro station and the user equipment measurement information.
In this step, the position indication information of the micro station is used for the position within the coverage of the macro station where the micro station is located, and may be represented as a distance value from the macro station to the micro station, or may be represented as a received power of the micro station for receiving a reference signal of the macro station; the resource utilization rate of the almost blank subframe represents the proportion of resources used by the micro station for scheduling the user equipment on the ABS subframe in the available resources of the subframe; the UE measurement information includes the received power of the macro-station reference signal and the received power of the micro-station reference signal measured by all UE performing resource scheduling on the ABS subframe.
Specifically, the macro station sends the ABS subframe pattern to the micro station, and obtains resource utilization and ue measurement information of almost blank subframes collected by the micro station when performing resource scheduling according to the ABS subframe pattern.
Step S320: and judging the strong and weak coverage range of the position of the micro station according to the position indication information.
In this step, the macro station determines whether the position of the micro station is in the strong coverage range or the weak coverage range of the macro station according to the position indication information sent by the micro station.
Step S330: and if the position of the micro station is judged to be in the weak coverage range, adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
In this step, when the macro station determines that the position of the micro station is in the weak coverage area of the macro station, the macro station adjusts the transmission power in each ABS subframe one by one according to the resource utilization rate of the almost blank subframes and the measurement information of the user equipment.
Specifically, when the macro station determines that the position of the micro station is in the weak coverage area of the macro station, the macro station adjusts the transmission power of the PDCCH and the PDSCH on each ABS subframe one by one according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
According to the method for adjusting the transmission power of the almost blank subframe, the macro station adjusts the transmission power of the ABS subframe according to the acquired position indication information of the micro station, the resource utilization rate of the almost blank subframe and the user equipment measurement information, the ABS subframe transmission power is adjusted only within the weak coverage range of the macro station at the position of the micro station, the influence of unnecessary transmission power adjustment on the performance of the micro station is avoided, the ABS subframe transmission power is adjusted according to the resource utilization rate of the almost blank subframe and the user equipment measurement information, the transmission power on the ABS subframe is adjusted more accurately, and the resource utilization rate and the throughput of a system are effectively improved.
In one embodiment, after the step of determining the strong and weak coverage of the position of the micro station according to the position indication information, the method further includes the following steps: and if the position of the micro station is judged to be in the strong coverage range, adjusting the transmitting power of the macro station on the almost blank subframe to be zero.
In this embodiment, when the macro station determines that the position of the micro station is within the strong coverage of the macro station, the probability that the micro station is strongly interfered by the macro station is high, the macro station raises the transmission power on the ABS subframe, which often causes the burst interference to the micro station, resulting in the performance degradation of the micro station, and at this time, the macro station directly adjusts the transmission power on the ABS subframe to zero, thereby avoiding the influence of unnecessary power rise on the performance of the micro station, and reducing the processing complexity. Specifically, when the macro station determines that the micro station is in a strong coverage area of the macro station, the macro station directly limits the transmission power of the PDCCH and the PDSCH on the ABS subframe to zero.
In one embodiment, the position indication information comprises a macro-station to micro-station spacing value; the method comprises the following steps of judging the strong and weak coverage range of the position of the micro station according to the position indication information: if the distance value is larger than a preset distance threshold value, judging that the position of the micro station is in a weak coverage range; and if the distance value is smaller than or equal to the preset distance threshold value, judging that the position of the micro station is in the strong coverage range.
In this embodiment, the position indication information is represented as a distance value from the macro station to the micro station; the method comprises the steps of utilizing a distance value between a macro station and a micro station and a preset distance threshold value to judge the strong and weak coverage range, judging that the position of the micro station is in the strong coverage range of the macro station when the distance between the macro station and the micro station is smaller than or equal to the preset distance threshold value, otherwise judging that the position of the micro station is in the weak coverage range of the macro station, and converting the judgment of the strong and weak coverage range of the position of the micro station into the comparison of the distance value through setting the distance threshold, thereby simplifying the judgment work flow.
In one embodiment, the position indication information comprises a first receiving power of the micro station for receiving the macro station reference signal; the method comprises the following steps of judging the strong and weak coverage range of the position of the micro station according to the position indication information: if the first receiving power is smaller than a preset reference signal receiving power threshold value, judging that the position of the micro station is in a weak coverage range; and if the first receiving power is greater than or equal to the preset reference signal receiving power threshold value, judging that the position of the micro station is in a strong coverage range.
In this embodiment, the position indication information is represented by the received power of the macro station reference signal received by the micro station; judging strong and weak coverage ranges by using the receiving power of the reference information of the macro station received by the micro station and a preset reference information receiving power threshold, when the receiving power of the reference signal of the macro station received by the micro station is greater than or equal to a preset reference signal receiving power threshold value, judging that the position of the micro station is in the strong coverage range of the macro station, otherwise, judging that the position of the micro station is in the weak coverage range of the macro station; by setting a preset reference signal received power threshold value, the judgment of the strong and weak coverage range of the position where the micro station is located is converted into the comparison of the received power, the judgment processing flow is simplified, and the workload of the system is reduced.
In one embodiment, the step of adjusting the transmit power of the macro station on the almost blank subframes according to the resource utilization of the almost blank subframes and the measurement information of the user equipment comprises the following steps: if the resource utilization rate of the almost blank subframe is greater than or equal to a preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe to be zero; and if the resource utilization rate of the almost blank subframe is less than the preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe according to the measurement information of the user equipment.
In this embodiment, when the micro station is in the weak coverage of the macro station, an adjustment strategy of the transmission power of the macro station on each ABS subframe is determined one by one according to the resource utilization rate of the almost blank subframes, and when the resource utilization rate of the almost blank subframes is greater than or equal to a preset resource utilization rate threshold value, that is, the resource utilization rate of the almost blank subframes is high, the probability that the resource scheduled by the macro station on the ABS subframes and the resource scheduled by the micro station on the ABS subframes conflict is high, which easily causes performance degradation of the micro station, and the situation that a user connected to the micro station drops the call and disconnects the line is increased, therefore, under the condition that the resource utilization rate of the almost blank subframes is high, the macro station directly adjusts the transmission power on the ABS subframes to zero, thereby avoiding the influence of unnecessary power rise on the performance of the micro station and reducing the processing complexity; and when the resource utilization rate of the almost blank subframe is smaller than a preset resource utilization rate threshold value, namely the resource utilization rate of the almost blank subframe is lower, the macro station lifts the transmitting power on the ABS subframe according to the measurement information of the user equipment so as to improve the resource utilization rate and the throughput of the system.
In one embodiment, the ue measurement information includes a second receive power of each ue for receiving the macro bs reference signal and a third receive power of each ue for receiving the micro bs reference signal; the step of adjusting the transmitting power of the macro station on the almost blank subframe according to the user equipment measurement information comprises the following steps: acquiring first average power of the macro station reference signal received by the user equipment according to each second received power; acquiring second average power of the user equipment for receiving the micro station reference signal according to the third received power; and calculating the transmitting power of the macro station on the almost blank subframe according to the transmitting power of the reference signal of the macro station, the transmitting power of the reference signal of the micro station, the first average power, the second average power, the transmitting power of the micro station on the almost blank subframe and the receiving power difference threshold.
In this implementation, the ue includes all ues performing resource scheduling on the ABS subframe; when the micro station is in the weak coverage of the macro station, and when the resource utilization rate of the almost blank subframe is smaller than a preset resource utilization rate threshold value, namely the resource utilization rate of the almost blank subframe is low, the transmitting power of the macro station on the ABS subframe is accurately calculated according to the measurement information of the user equipment, so that the performance of the micro station is prevented from being interfered, the influence on the downlink demodulation capacity of the micro station is reduced, the transmitting power of the ABS subframe is more accurately adjusted by combining the condition of the ABS subframe utilization rate and the measurement information of the user equipment, and the resource utilization rate of a system and the system throughput are effectively improved.
Specifically, the receiving power difference threshold is determined according to the receiving performance requirement of the base station, when the receiving performance requirement of the base station is higher, the receiving power difference threshold is larger, and when the receiving performance requirement of the base station is lower, the receiving power difference threshold is smaller; the reference signal transmitting power of the micro station can be obtained by the macro station through monitoring the broadcast information of the micro station, and the transmitting power of the micro station on the almost blank subframe can be obtained by the macro station according to the reference signal transmitting power estimation of the micro station; the UE measurement information comprises the received power of the macro station reference signal and the received power of the micro station reference signal measured by all UE performing resource scheduling on the ABS subframe, the first average power is calculated according to the received power of the macro station reference signal of all the UE, and the second average power is calculated according to the received power of the micro station reference signal of all the UE; and calculating the transmitting power of the macro station on the almost blank subframe according to the transmitting power of the reference signal of the macro station, the transmitting power of the reference signal of the micro station, the first average power, the second average power, the transmitting power of the micro station on the almost blank subframe and the receiving power difference threshold.
Further, in one embodiment, the step of calculating the transmit power of the macro station on the almost blank subframe according to the reference signal transmit power of the macro station, the reference signal transmit power of the micro station, the first average power, the second average power, the transmit power of the micro station on the almost blank subframe, and the receive power difference threshold includes the following steps: calculating the transmitting power of the macro station on the almost blank subframe according to the following formula (1);
Pmacro＝Ppico+((CRSmacro-RSRPmacro)-(CRSpico-RSRPpico))-Δ (1)
wherein, PmacroIndicating the transmitting power of the macro station on the almost blank subframe; ppicoRepresenting the transmission power of the micro station on the almost blank subframe; CRSmacroRepresenting a reference signal transmit power of the macro station; CRSpicoRepresenting a reference signal transmit power of the micro station; RSRPmacroRepresenting a first average power; RSRPpicoRepresenting a second average power; delta represents a receive power difference threshold.
It should be noted that, since the scheduled user equipments on each ABS subframe are not necessarily the same, RSRP is usedmacroAnd RSRPpicoMay also be different, and therefore, the transmit power of the macro station on each ABS subframe is also different.
Referring to fig. 4, fig. 4 is a flowchart of a method for adjusting the transmission power of an almost blank subframe according to another embodiment of the present invention; in this embodiment, the technical solution of the present invention is further explained by taking fig. 1 as an example, and the method for adjusting the transmission power of the almost blank subframe includes the following steps:
step S410: acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information; the position indication information comprises first receiving power of the micro station for receiving the macro station reference signal, and the user equipment measurement information comprises second receiving power of each user equipment for receiving the macro station reference signal and third receiving power of each user equipment for receiving the micro station reference signal.
In this step, the position indication information of the micro station is used for the position within the coverage of the macro station where the micro station is located, and may be represented as the received power of the macro station reference signal received by the micro station; the resource utilization rate of the almost blank subframe represents the proportion of resources used by the micro station for scheduling the user equipment on the ABS subframe in the available resources of the subframe; the UE measurement information includes the received power of the macro-station reference signal and the received power of the micro-station reference signal measured by all UE performing resource scheduling on the ABS subframe.
Taking fig. 1 as an example, the macro station 110 sends the ABS subframe pattern to the micro station 120, and the micro station 120 performs resource scheduling according to the ABS subframe pattern, and collects resource utilization of almost blank subframes and ue measurement information and feeds back the resource utilization and ue measurement information to the macro station 110. Wherein, the first receiving power of the micro station 120 receiving the reference signal of the macro station 110 is-95 dBm; as shown in fig. 5, an ABS subframe pattern sent by the macro station 110 is that the micro station 120 schedules the ue 131 on an ABS subframe in the ABS subframe pattern, schedules the ue 132 on a non-ABS subframe, and respectively counts resource utilization rates of the ABS subframes, where resource utilization rate of subframe 0 of frame 0 is 100%, resource utilization rate of subframe 6 of frame 0 is 90%, resource utilization rate of subframe 0 of frame 1 is 40%, second receiving power of the ue 131 receiving a reference signal of the macro station 110 is-90 dBm, and third receiving power of the ue 131 receiving a reference signal of the micro station 120 is-80 dBm.
Step S420: judging whether the first receiving power is smaller than a preset reference signal receiving power threshold value, if so, judging that the position of the micro station is in a weak coverage range, and skipping to the step S430; if not, the position of the micro station is determined to be in the strong coverage range, and the step S460 is skipped.
In this step, it is assumed that the preset reference signal received power threshold is-88 dBm, and the first received power of the micro station 120 receiving the reference signal of the macro station 110 is-95 dBm, then the position of the micro station 120 is within the weak coverage of the macro station 110.
Step S430: judging whether the resource utilization rate of the almost blank subframe is smaller than a preset resource utilization rate threshold value, if not, skipping to the step S460; if yes, go to step S440.
After determining that the micro station 120 is located in the weak coverage area of the macro station 110, the power adjustment policy of each ABS subframe is determined one by one according to the resource utilization rate of the ABS subframes, as shown in step S410, the resource utilization rates of the ABS subframes are respectively that frame 0 subframe 0 is 100%, frame 0 subframe 6 is 90%, frame 1 subframe 0 is 40%, and the preset resource utilization threshold is 50%, it is known that the resource utilization rates of frame 0 subframe 0 and frame 0 subframe 6 in the ABS subframes are both greater than the preset resource utilization threshold, and the resource utilization rate of frame 1 subframe 0 is less than the preset resource utilization threshold.
Step S440: acquiring first average power of the macro station reference signal received by the user equipment according to each second received power; and acquiring second average power of the user equipment for receiving the micro station reference signal according to the third received powers.
Since the resource utilization of the subframe 0 of frame 1 is smaller than the preset resource utilization threshold, it is determined that the macro station 110 adjusts the transmission power on the subframe 0 of frame 1. The second receiving power of each user equipment receiving the macro station reference signal and the third receiving power of each user equipment receiving the micro station reference signal in the user equipment measurement information are used, that is, the average value of the receiving power of the macro station reference signal received by all the user equipment performing scheduling on the subframe 0 of the frame 1 and the average value of the receiving power of the micro station reference signal received by all the user equipment performing scheduling on the subframe 0 of the frame 1 are obtained; the user equipment scheduled on the subframe 0 of frame 1 has only the user equipment 131, and thus is directly calculated according to the second received power of the reference signal received by the user equipment 131 from the macro station 110 and the third received power of the reference signal received by the micro station 120.
Step S450: and calculating the transmitting power of the macro station on the almost blank subframe according to the transmitting power of the reference signal of the macro station, the transmitting power of the reference signal of the micro station, the first average power, the second average power, the transmitting power of the micro station on the almost blank subframe and the receiving power difference threshold.
In this step, the macro station 110 may obtain the reference signal transmission power of the micro station 120 by monitoring the broadcast information of the micro station 120, and estimate the transmission power of the micro station 120 on the almost blank subframe; the reference signal transmit power of the macro station 110 is a parameter known to the macro station 110; the received power difference threshold may be obtained by testing or simulating the base station, and the transmitted power of the macro station 110 on the almost blank subframe is obtained by fast calculating the reference signal transmitted power of the macro station 110, the reference signal transmitted power of the micro station 120, the first average power, the second average power, the transmitted power of the micro station 120 on the almost blank subframe, and the received power difference threshold.
Step S460: the transmit power of the macro station on almost blank subframes is adjusted to a value of zero.
In the embodiment, a power adjustment strategy of an ABS subframe of a macro station is determined by combining the coverage of the macro station where the micro station is located, the resource utilization rate of the ABS subframe used by the micro station and the UE measurement information for performing resource scheduling on the ABS subframe, when the micro station is in the strong coverage of the macro station, the power of a PDCCH and a PDSCH on the ABS subframe is directly limited to be 0, and when the micro station is in the weak coverage of the macro station and the utilization rate of the ABS subframe is low, the transmitting power of the ABS subframe is adjusted according to the UE measurement information for performing resource scheduling on the ABS subframe, the ABS subframe and a non-zero ABS subframe are not distinguished, the interference condition of the micro station by the macro station and the utilization rate condition of the ABS subframe are comprehensively considered, the ABS subframe power adjustment criterion is more accurately implemented, and the resource utilization rate of a system is effectively improved.
It should be understood that, although the steps in the flowcharts of fig. 3 and 4 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 3 and 4 may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
According to the method for adjusting the transmission power of the almost blank subframe, the invention further provides a device for adjusting the transmission power of the almost blank subframe, and the following describes an embodiment of the device for adjusting the transmission power of the almost blank subframe in detail.
In one embodiment, as shown in fig. 6, fig. 6 is a schematic structural diagram of an apparatus for adjusting almost blank subframe transmission power in an embodiment of the present invention, and provides an apparatus for adjusting almost blank subframe transmission power, including: an information acquisition module 610, a coverage determination module 620 and a transmission power adjustment module 630, wherein:
an information obtaining module 610, configured to obtain location indication information of a micro station, resource utilization of an almost blank subframe fed back by the micro station, and user equipment measurement information;
a coverage area judging module 620, configured to judge, according to the position indication information, a strong coverage area and a weak coverage area of the position where the micro station is located;
and a transmit power adjustment module 630, configured to, when it is determined that the location of the micro station is within the weak coverage, adjust transmit power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
In the apparatus for adjusting almost blank subframe transmit power, the transmit power adjusting module 630 adjusts the transmit power of the almost blank subframe in combination with the position indication information of the micro station, the resource utilization rate of the almost blank subframe, and the measurement information of the user equipment, which are obtained by the information obtaining module 610, and only adjusts the transmit power of the almost blank subframe when the position of the micro station is within the weak coverage of the macro station, thereby avoiding the influence of unnecessary transmit power adjustment on the performance of the micro station.
In one embodiment, the transmit power adjustment module 630 is further configured to adjust the transmit power of the macro station on the almost blank subframe to a zero value when the micro station is determined to be located in the strong coverage area.
In one embodiment, the position indication information comprises a macro-station to micro-station spacing value; the coverage area determination module 620 is configured to determine that the position of the micro station is within a weak coverage area when the distance value is greater than a preset distance threshold value; and when the distance value is smaller than or equal to the preset distance threshold value, judging that the position of the micro station is in a strong coverage range.
In one embodiment, the position indication information comprises a first receiving power of the micro station for receiving the macro station reference signal; the coverage area determination module 620 is configured to determine that the position of the micro station is within a weak coverage area when the first received power is smaller than a preset reference signal received power threshold; and when the first receiving power is greater than or equal to a preset reference signal receiving power threshold value, judging that the position of the micro station is in a strong coverage range.
In one embodiment, the transmit power adjustment module 630 is configured to adjust the transmit power of the macro station on the almost blank subframe to a zero value when the resource utilization of the almost blank subframe is greater than or equal to a preset resource utilization threshold; and when the resource utilization rate of the almost blank subframe is less than a preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe according to the measurement information of the user equipment.
In one embodiment, the ue measurement information includes a second receive power of each ue for receiving the macro bs reference signal and a third receive power of each ue for receiving the micro bs reference signal; the transmission power adjustment module 630 is configured to obtain a first average power of the macro station reference signal received by the ue according to each second received power; acquiring second average power of the user equipment for receiving the micro station reference signal according to the third received power; and calculating the transmitting power of the macro station on the almost blank subframe according to the transmitting power of the reference signal of the macro station, the transmitting power of the reference signal of the micro station, the first average power, the second average power, the transmitting power of the micro station on the almost blank subframe and the receiving power difference threshold.
In one embodiment, the transmit power adjustment module 630 is configured to calculate the transmit power of the macro station on the almost blank subframe according to the following formula (2);
Pmacro＝Ppico+((CRSmacro-RSRPmacro)-(CRSpico-RSRPpico))-Δ (2)
wherein, PmacroIndicating the transmitting power of the macro station on the almost blank subframe; ppicoRepresenting the transmission power of the micro station on the almost blank subframe; CRSmacroRepresenting a reference signal transmit power of the macro station; CRSpicoRepresenting a reference signal transmit power of the micro station; RSRPmacroRepresenting a first average power; RSRPpicoRepresenting a second average power; delta represents a receive power difference threshold.
For specific limitations of the apparatus for adjusting the almost blank subframe transmission power, reference may be made to the above limitations of the method for adjusting the almost blank subframe transmission power, and details are not repeated here. The modules in the device for adjusting the transmission power of the almost blank subframes can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing data such as position indication information, almost blank subframe resource utilization rate, user equipment measurement information and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of adjusting almost blank subframe transmit power.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information;
judging the strong and weak coverage range of the position of the micro station according to the position indication information;
and if the position of the micro station is judged to be in the weak coverage range, adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and if the position of the micro station is judged to be in the strong coverage range, adjusting the transmitting power of the macro station on the almost blank subframe to be zero.
In one embodiment, the position indication information comprises a macro-station to micro-station spacing value; the processor, when executing the computer program, further performs the steps of: if the distance value is larger than a preset distance threshold value, judging that the position of the micro station is in a weak coverage range; and if the distance value is smaller than or equal to the preset distance threshold value, judging that the position of the micro station is in the strong coverage range.
In one embodiment, the position indication information comprises a first receiving power of the micro station for receiving the macro station reference signal; the processor, when executing the computer program, further performs the steps of: if the first receiving power is smaller than a preset reference signal receiving power threshold value, judging that the position of the micro station is in a weak coverage range; and if the first receiving power is greater than or equal to the preset reference signal receiving power threshold value, judging that the position of the micro station is in a strong coverage range.
In one embodiment, the processor, when executing the computer program, further performs the steps of: if the resource utilization rate of the almost blank subframe is greater than or equal to a preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe to be zero; and if the resource utilization rate of the almost blank subframe is less than the preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe according to the measurement information of the user equipment.
In one embodiment, the ue measurement information includes a second receive power of each ue for receiving the macro bs reference signal and a third receive power of each ue for receiving the micro bs reference signal; the processor, when executing the computer program, further performs the steps of: acquiring first average power of the macro station reference signal received by the user equipment according to each second received power; acquiring second average power of the user equipment for receiving the micro station reference signal according to the third received power; and calculating the transmitting power of the macro station on the almost blank subframe according to the transmitting power of the reference signal of the macro station, the transmitting power of the reference signal of the micro station, the first average power, the second average power, the transmitting power of the micro station on the almost blank subframe and the receiving power difference threshold.
In one embodiment, the processor, when executing the computer program, further performs the steps of: calculating the transmitting power of the macro station on the almost blank subframe according to the following formula (3);
Pmacro＝Ppico+((CRSmacro-RSRPmacro)-(CRSpico-RSRPpico))-Δ (3)
wherein, PmacroIndicating the transmitting power of the macro station on the almost blank subframe; ppicoRepresenting the transmission power of the micro station on the almost blank subframe; CRSmacroRepresenting a reference signal transmit power of the macro station; CRSpicoRepresenting a reference signal transmit power of the micro station; RSRPmacroRepresenting a first average power; RSRPpicoRepresenting a second average power; delta represents a receive power difference threshold.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which when executed by a processor performs the steps of:
acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information;
judging the strong and weak coverage range of the position of the micro station according to the position indication information;
and if the position of the micro station is judged to be in the weak coverage range, adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
In one embodiment, the computer program when executed by the processor further performs the steps of: and if the position of the micro station is judged to be in the strong coverage range, adjusting the transmitting power of the macro station on the almost blank subframe to be zero.
In one embodiment, the position indication information comprises a macro-station to micro-station spacing value; the computer program when executed by the processor further realizes the steps of: if the distance value is larger than a preset distance threshold value, judging that the position of the micro station is in a weak coverage range; and if the distance value is smaller than or equal to the preset distance threshold value, judging that the position of the micro station is in the strong coverage range.
In one embodiment, the position indication information comprises a first receiving power of the micro station for receiving the macro station reference signal; the computer program when executed by the processor further realizes the steps of: if the first receiving power is smaller than a preset reference signal receiving power threshold value, judging that the position of the micro station is in a weak coverage range; and if the first receiving power is greater than or equal to the preset reference signal receiving power threshold value, judging that the position of the micro station is in a strong coverage range.
In one embodiment, the computer program when executed by the processor further performs the steps of: if the resource utilization rate of the almost blank subframe is greater than or equal to a preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe to be zero; and if the resource utilization rate of the almost blank subframe is less than the preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe according to the measurement information of the user equipment.
In one embodiment, the ue measurement information includes a second receive power of each ue for receiving the macro bs reference signal and a third receive power of each ue for receiving the micro bs reference signal; the computer program when executed by the processor further realizes the steps of: acquiring first average power of the macro station reference signal received by the user equipment according to each second received power; acquiring second average power of the user equipment for receiving the micro station reference signal according to the third received power; and calculating the transmitting power of the macro station on the almost blank subframe according to the transmitting power of the reference signal of the macro station, the transmitting power of the reference signal of the micro station, the first average power, the second average power, the transmitting power of the micro station on the almost blank subframe and the receiving power difference threshold.
In one embodiment, the computer program when executed by the processor further performs the steps of: calculating the transmitting power of the macro station on the almost blank subframe according to the following formula (4);
Pmacro＝Ppico+((CRSmacro-RSRPmacro)-(CRSpico-RSRPpico))-Δ (4)
wherein, PmacroIndicating the transmitting power of the macro station on the almost blank subframe; ppicoRepresenting the transmission power of the micro station on the almost blank subframe; CRSmacroRepresenting a reference signal transmit power of the macro station; CRSpicoRepresenting a reference signal transmit power of the micro station; RSRPmacroRepresenting a first average power; RSRPpicoRepresenting a second average power; delta represents a receive power difference threshold.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for adjusting the transmission power of almost blank subframes is characterized by comprising the following steps:
acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information; the UE measurement information comprises second receiving power of each UE for receiving a macro station reference signal and third receiving power of each UE for receiving a micro station reference signal;
judging the strong and weak coverage range of the position of the micro station according to the position indication information;
and if the position of the micro station is judged to be in the weak coverage range, adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the measurement information of the user equipment.
2. The method for adjusting the transmission power of the almost blank subframe according to claim 1, wherein after the step of determining the strong and weak coverage areas of the micro station according to the location indication information, the method further comprises the following steps:
and if the position of the micro station is judged to be in the strong coverage range, adjusting the transmitting power of the macro station on the almost blank subframe to be zero.
3. The method for adjusting the transmission power of the almost blank subframe according to claim 1 or 2, wherein the position indication information includes a distance value from the macro station to the micro station;
the step of judging the strong and weak coverage range of the position where the micro station is located according to the position indication information comprises the following steps:
if the distance value is larger than a preset distance threshold value, judging that the position of the micro station is in a weak coverage range;
and if the distance value is smaller than or equal to the preset distance threshold value, judging that the position of the micro station is in a strong coverage range.
4. The method of claim 1 or 2, wherein the position indication information comprises a first received power of the micro station for receiving a macro station reference signal;
the step of judging the strong and weak coverage range of the position where the micro station is located according to the position indication information comprises the following steps:
if the first receiving power is smaller than a preset reference signal receiving power threshold value, judging that the position of the micro station is in a weak coverage range;
and if the first receiving power is greater than or equal to the preset reference signal receiving power threshold value, judging that the position of the micro station is in a strong coverage range.
5. The method for adjusting transmission power of almost blank subframes according to claim 1, wherein the step of adjusting the transmission power of the macro station on the almost blank subframes according to the resource utilization of the almost blank subframes and the UE measurement information comprises the following steps:
if the resource utilization rate of the almost blank subframe is greater than or equal to a preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe to be zero;
and if the resource utilization rate of the almost blank subframe is less than the preset resource utilization rate threshold value, adjusting the transmitting power of the macro station on the almost blank subframe according to the user equipment measurement information.
6. The method for adjusting transmission power of almost blank subframes according to claim 5, wherein the step of adjusting the transmission power of the macro station on the almost blank subframes according to the UE measurement information comprises the following steps:
acquiring first average power of the user equipment for receiving the reference signal of the macro station according to the second received power;
acquiring second average power of the user equipment for receiving the micro station reference signal according to the third received power;
and calculating the transmitting power of the macro station on the almost blank subframe according to the reference signal transmitting power of the macro station, the reference signal transmitting power of the micro station, the first average power, the second average power, the transmitting power of the micro station on the almost blank subframe and a receiving power difference threshold.
7. The method of claim 6, wherein the step of calculating the transmit power of the macro station in the almost blank subframe according to the reference signal transmit power of the macro station, the reference signal transmit power of the micro station, the first average power, the second average power, the transmit power of the micro station in the almost blank subframe, and a receive power difference threshold comprises the steps of:
according to Pmacro＝Ppico+((CRSmacro-RSRPmacro)-(CRSpico-RSRPpico) - Δ calculating the transmit power of the macro station on the almost blank subframes;
wherein, PmacroRepresenting a transmit power of the macro station on the almost blank subframe; ppicoRepresenting a transmit power of the micro station on the almost blank subframe; CRSmacroA reference signal transmit power representative of the macro station; CRSpicoRepresenting a reference signal transmit power of the micro station; RSRPmacroRepresenting the first average power; RSRPpicoRepresenting the second average power; delta represents a receive power difference threshold.
8. An apparatus for adjusting transmission power of an almost blank subframe, comprising:
the system comprises an information acquisition module, a position acquisition module and a resource allocation module, wherein the information acquisition module is used for acquiring position indication information of a micro station, resource utilization rate of almost blank subframes fed back by the micro station and user equipment measurement information; the UE measurement information comprises second receiving power of each UE for receiving a macro station reference signal and third receiving power of each UE for receiving a micro station reference signal;
the coverage area judging module is used for judging the strong and weak coverage area of the position where the micro station is located according to the position indication information;
and the transmitting power adjusting module is used for adjusting the transmitting power of the macro station on the almost blank subframe according to the resource utilization rate of the almost blank subframe and the user equipment measurement information when the position of the micro station is judged to be in the weak coverage range.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program performs the step of adjusting the almost blank subframe transmission power of any one of claims 1 to 7.
10. A computer readable storage medium having a computer program stored thereon, wherein the computer program when executed by a processor performs the step of adjusting the transmission power of an almost blank subframe according to any one of claims 1 to 7.
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