CN108541059B - Power control method and device - Google Patents

Power control method and device Download PDF

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CN108541059B
CN108541059B CN201710116166.3A CN201710116166A CN108541059B CN 108541059 B CN108541059 B CN 108541059B CN 201710116166 A CN201710116166 A CN 201710116166A CN 108541059 B CN108541059 B CN 108541059B
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cpe
transmission power
power
value
final
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CN108541059A (en
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曹驷鹏
谭然
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ZTE Corp
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The invention discloses a power control method and a device, which relate to the technical field of mobile communication, wherein the method comprises the following steps: the UE calculates a first transmission power value P1 according to the power control parameter issued by the base station; the UE receives a second transmission power value P2 and a third transmission power value P3 sent by CPE and determines the final transmission power according to the P1, the P2 and the P3; or, the UE receives a fourth power value P4 sent by the CPE and determines the final transmission power according to the P1 and the P4.

Description

Power control method and device
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a power control method and apparatus.
Background
With the development of information technology, IOT (Internet of Things) is recognized as the third wave of development of information industry after computers and Internet. A basic condition for realizing the internet of things is mass connection between objects, and the current large-scale commercial LTE (Long Term Evolution) which is the most advanced mobile communication technology cannot meet the connection requirement. Therefore, the fifth generation mobile communication technology (5G) with low power consumption and large connection features is considered to realize a real internet of things. Then, when testing the base station of the 5G-IOT, a large number of test UEs (User equipments) are required to test the massive connection characteristics. Currently, for the test of eNodeB of 4G-LTE, a method of simulating a single UE by using a single CPE (Customer Premises Equipment) is adopted to mainly test whether the data rate meets the performance requirement, and the power control of the single UE can meet the requirement of the rate according to the algorithm of the 4G-LTE protocol.
Obviously, if the method of simulating a single UE by using a single CPE is also adopted, the speed test requirement of the 5G-IOT can only be met, and the test requirement of the 5G-IOT large connection cannot be met. And the single CPE is utilized to simulate a plurality of UEs, so that the performance test of the large connection can be well met. For the method, if a power control algorithm of a single UE in a standard protocol is simply adopted, the power sum of a plurality of simulated UEs can exceed the power amplifier bearing capacity of the CPE due to the fact that no factor related to the number of the UEs exists.
Disclosure of Invention
The technical problem solved by the scheme provided by the embodiment of the invention is that a power amplifier is shared by multiple users to communicate with a base station, and the uplink power distribution of the multiple users cannot be realized.
According to the power control method provided by the embodiment of the invention, the method comprises the following steps:
the UE calculates a first transmission power value P1 according to the power control parameter issued by the base station;
the UE receives a second transmitting power value P2 and a third transmitting power value P3 sent by the CPE and determines final transmitting power according to the P1, the P2 and the P3;
or, the UE receives a fourth power value P4 sent by the CPE and determines the final transmission power according to the P1 and the P4.
Preferably, the UE determining the final transmit power according to the P1, P2, P3 comprises:
the UE comparing the P2 with the P3;
if the P2 is greater than the P3, the UE selects the minimum value from the P1 and the P3 and takes the selected minimum value as the final transmission power;
if the P2 is smaller than the P3, the UE selects the minimum value from the P1 and the P2, and takes the selected minimum value as the final transmission power.
Preferably, the UE determining a final transmit power from the P1, P4 comprises:
the UE comparing the P1 with the P4;
if the P1 is greater than the P4, the UE treats the P4 as a final transmit power;
if the P1 is less than the P4, the UE treats the P1 as the final transmit power.
Preferably, the P1 refers to a transmission power value of each UE, the P2 refers to a constrained transmission power value allocated to each UE by a CPE, the P3 refers to an actual maximum transmission power value of each UE, and the P4 refers to a minimum value of the P2 and the P3.
Preferably, the second transmission power value P2 includes:
the CPE determines the number of resource elements occupied by each UE, the total number of users and the total number of resource blocks which are required to be scheduled by the CPE according to the current scheduling information of the base station;
the CPE calculates the total number of the resource elements occupied by all the UE according to the determined number of the resource elements occupied by each UE, the total number of the users needing to be scheduled by the CPE and the total number of the resource blocks;
the CPE calculates the average transmitting power distributed by each resource element according to the maximum transmitting power and the total number of the resource elements occupied by all the UE;
and the CPE determines the P2 according to the calculated number of the resource elements occupied by each UE and the calculated average transmission power distributed to each resource element.
Preferably, the second transmission power value P3 includes:
the CPE receives the maximum transmitting power of each UE issued by the base station;
the CPE determines the total number of users needing scheduling according to the current scheduling information of the base station;
the CPE determines the P3 based on its maximum transmit power, the determined total number of users, and the received maximum transmit power for each UE.
According to an embodiment of the present invention, a power control apparatus includes:
the calculation module is used for calculating a first transmission power value P1 according to the power control parameter issued by the base station;
a determining module, configured to receive a second transmission power value P2 and a third transmission power value P3 sent by a CPE, and determine a final transmission power according to the P1, the P2, and the P3; or receiving a fourth power value P4 sent by the CPE and determining the final transmission power according to the P1 and the P4.
Preferably, the determining module comprises:
a first comparison unit for comparing the P2 with the P3;
a first determining unit, configured to select a minimum value from the P1 and the P3 and use the selected minimum value as a final transmit power when the P2 is greater than the P3, and select a minimum value from the P1 and the P2 and use the selected minimum value as a final transmit power when the P2 is less than the P3.
Preferably, the determining module comprises:
a second comparing unit for comparing the P2 with the P4;
a second determining unit, configured to determine the P4 as a final transmit power when the P1 is greater than the P4, and determine the P1 as a final transmit power when the P1 is less than the P4.
Preferably, the P1 refers to a transmission power value of each UE, the P2 refers to a constrained transmission power value allocated to each UE by a CPE, the P3 refers to an actual maximum transmission power value of each UE, and the P4 refers to a minimum value of the P2 and the P3.
According to the scheme provided by the embodiment of the invention, when the large connection performance of the 5G-IOT base station is tested, the number of CPE used in the test is greatly reduced, the system complexity is reduced, and the cost is saved.
Drawings
Fig. 1 is a flowchart of a power control method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a power control apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a 5G-IOT base station tested by simulating a single UE with a single CPE according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a 5G-IOT base station tested by using a single CPE to simulate multiple UEs according to an embodiment of the present invention;
fig. 5 is a flowchart of a power control method for testing a 5G-IOT base station by simulating multiple UEs with a single CPE according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention.
Fig. 1 is a flowchart of a power control method according to an embodiment of the present invention, as shown in fig. 1, including:
step S101: the UE calculates a first transmission power value P1 according to the power control parameter issued by the base station;
step S102: the UE receives a second transmission power value P2 and a third transmission power value P3 sent by CPE and determines the final transmission power according to the P1, the P2 and the P3; or the UE receives a fourth power value P4 sent by the CPE and determines the final transmission power according to the P1 and the P4.
Wherein the UE determining a final transmit power from the P1, P2, P3 comprises: the UE comparing the P2 with the P3; if the P2 is greater than the P3, the UE selects the minimum value from the P1 and the P3 and takes the selected minimum value as the final transmission power; if the P2 is smaller than the P3, the UE selects the minimum value from the P1 and the P2, and takes the selected minimum value as the final transmission power.
Wherein the UE determining a final transmit power from the P1, P4 comprises: the UE comparing the P1 with the P4; if the P1 is greater than the P4, the UE treats the P4 as a final transmit power; if the P1 is less than the P4, the UE treats the P1 as the final transmit power.
Specifically, the P1 refers to a transmission power value of each UE, the P2 refers to a constrained transmission power value allocated to each UE by a CPE, the P3 refers to an actual maximum transmission power value of each UE, and the P4 refers to a minimum value of the P2 and the P3.
Wherein the second transmission power value P2 includes: the CPE determines the number of resource elements occupied by each UE, the total number of users and the total number of resource blocks which are required to be scheduled by the CPE according to the current scheduling information of the base station; the CPE calculates the total number of the resource elements occupied by all the UE according to the determined number of the resource elements occupied by each UE, the total number of the users needing to be scheduled by the CPE and the total number of the resource blocks; the CPE calculates the average transmitting power distributed by each resource element according to the maximum transmitting power and the total number of the resource elements occupied by all the UE; and the CPE determines the P2 according to the calculated number of the resource elements occupied by each UE and the calculated average transmission power distributed to each resource element.
Wherein the second transmission power value P3 includes: the CPE receives the maximum transmitting power of each UE issued by the base station; the CPE determines the total number of users needing scheduling according to the current scheduling information of the base station; the CPE determines the P3 based on its maximum transmit power, the determined total number of users, and the received maximum transmit power for each UE.
Fig. 2 is a schematic diagram of a power control apparatus according to an embodiment of the present invention, as shown in fig. 2, including: a calculating module 201, configured to calculate a first transmit power value P1 according to a power control parameter issued by a base station; a determining module 202, configured to receive a second transmission power value P2 and a third transmission power value P3 sent by a CPE, and determine a final transmission power according to the P1, the P2, and the P3; or receiving a fourth power value P4 sent by the CPE and determining the final transmission power according to the P1 and the P4.
Wherein the determining module 202 comprises: a first comparison unit for comparing the P2 with the P3; a first determining unit, configured to select a minimum value from the P1 and the P3 and use the selected minimum value as a final transmit power when the P2 is greater than the P3, and select a minimum value from the P1 and the P2 and use the selected minimum value as a final transmit power when the P2 is less than the P3.
Wherein the determining module 202 comprises: a second comparing unit for comparing the P2 with the P4; a second determining unit, configured to determine the P4 as a final transmit power when the P1 is greater than the P4, and determine the P1 as a final transmit power when the P1 is less than the P4.
Specifically, the P1 refers to a transmission power value of each UE, the P2 refers to a constrained transmission power value allocated to each UE by a CPE, the P3 refers to an actual maximum transmission power value of each UE, and the P4 refers to a minimum value of the P2 and the P3.
The power sharing device according to the embodiment of the present invention includes not only the CPE but also other devices, and the power sharing device described herein takes the CPE as an example.
Fig. 3 and fig. 4 are schematic structural diagrams of a single CPE simulating single UE for testing a 5G-IOT base station and a single CPE simulating multiple UEs for testing a 5G-IOT base station according to an embodiment of the present invention.
Fig. 5 is a flowchart of a power control method for testing a 5G-IOT base station by simulating multiple UEs with a single CPE according to an embodiment of the present invention, as shown in fig. 5, including:
the base station side behaviors include:
1) maximum transmitting power P of UE issued through system messageCMAX；
2) And issuing various power control parameters of the UE through system messages.
The behavior of the CPE includes:
1) the CPE determines the number N of UE needing scheduling according to the current scheduling information of the base stationUE,c(i)；
2) The CPE determines the number of RE (Resource Element) occupied by a single UE according to the current scheduling information of the base station
Figure BDA0001235661850000071
3) The CPE determines the number of the dispatched RB (Resource Block) according to the current dispatching information of the base station
Figure BDA0001235661850000072
4) CPE is according to
Figure BDA0001235661850000073
And
Figure BDA0001235661850000074
determining the total number N of REs occupied by all users of the current CPERE,c(i)；
5) CPE utilizing maximum transmitting power P of CPEMAXDivided by the number of REs currently occupied by the CPE NRE,c(i) Calculating an average transmission power P per RERE,C(i)；
6) CPE utilizes the number of REs occupied by each UE
Figure BDA0001235661850000075
Multiplied by the average transmit power per RE PRE,C(i) Calculating the constrained transmit power of RE averaging for each UE
Figure BDA0001235661850000076
And feeds back to the UE;
7) CPE meterCalculating the actual maximum transmitting power of the UE
Figure BDA0001235661850000077
And feeds back to the UE.
Alternatively, the first and second electrodes may be,
1) -5) as above;
6) CPE utilizes the number of REs occupied by each UE
Figure BDA0001235661850000078
Multiplied by the average transmit power per RE, PRE,C(i) Calculating the constrained transmit power of RE averaging for each UE
Figure BDA0001235661850000079
7) CPE calculates the actual maximum transmitting power of UE
Figure BDA00012356618500000710
And from
Figure BDA00012356618500000711
And
Figure BDA00012356618500000712
and selecting a smaller value from the values and feeding the smaller value back to the UE.
Wherein the CPE calculates a constrained transmit power for each UE
Figure BDA00012356618500000713
The formula of (1) is:
Figure BDA00012356618500000714
in the embodiment of the invention, the transmitting power is equally divided by taking RE as a unit; the sum of the transmitting power of all users does not exceed the maximum transmitting power of the shared power amplifier; and reserving one RE for DLHarq in each PRB (Physical Resource Block) during normal uplink service.
In the formula (I), the
Figure BDA0001235661850000081
The resource number of RE resources occupied by each UE in a serving cell c and a subframe i under the current configuration is referred to; said N isRB,c(i) The number of RB resources which belong to the same power sharing equipment and are scheduled in a serving cell c and a subframe i under the current configuration is referred to; said N isRE,c(i) The resource allocation is the total number of RE resources occupied by all UE of the scheduled power sharing equipment in the serving cell c and the subframe i under the current configuration; said P isRE,C(i) The average transmission power that can be allocated to each RE by the CPE in the serving cell c and the subframe i under the current configuration is as follows:
PRE,C(i)＝PMAX/NRE,c(i)。
in particular, NRE,c(i) There are different calculation methods in the two cases:
A. upon initiation of RA:
Figure BDA0001235661850000082
B. in normal Uplink PUSCH (Physical Uplink Shared Channel) traffic:
Figure BDA0001235661850000083
wherein, CPE calculates the actual maximum transmitting power of the UE
Figure BDA0001235661850000084
The formula of (1) is as follows:
Figure BDA0001235661850000085
in the formula, the PMAXThe maximum transmission power of the power sharing equipment CPE is referred to; the P isCMAXThe maximum transmission power of each UE in a serving cell c and a subframe i configured by a base station; said N isUE,c(i) The total number of users belonging to the same power sharing equipment CPE and scheduled in a service cell c and a subframe i under the current configuration; the above-mentioned
Figure BDA0001235661850000091
Refers to the maximum transmit power that the CPE can allocate to each UE in the serving cell C, subframe i.
As can be seen from the equation, the actual maximum transmit power of the UE is related to the number of users sharing the power.
The behavior of the UE includes:
1) the UE calculates the transmitting power of each UE in the service cell C and the subframe i according to the power control parameter configured by the base station and the current other necessary parameters and the power control algorithm formula in the protocol
Figure BDA0001235661850000092
2) UE will transmit power
Figure BDA0001235661850000093
With the actual maximum transmit power
Figure BDA0001235661850000094
Comparing, and taking the smaller value as the actual transmitting power P of the UEUE,c(i)；
3) The UE transmits the actual transmission power P in the last stepUE,c(i) And constraining transmit power
Figure BDA0001235661850000095
Comparing, and taking the smaller value as the final transmitting power P of each UE performing IOT transmission in the service cell c and the subframe iUE,c(i)。
Figure BDA0001235661850000096
Alternatively, the UE will CPE from
Figure BDA0001235661850000097
And
Figure BDA0001235661850000098
of a selected smaller value of and
Figure BDA0001235661850000099
comparing, and selecting the minimum value as the final emission power P of each UE performing IOT transmission in the service cell c and the subframe iUE,c(i)。
According to the scheme provided by the embodiment of the invention, when the large connection performance of the 5G-IOT base station is tested, the number of CPE used in the test is greatly reduced, the system complexity is reduced, and the cost is saved.
Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.

Claims (4)

1. A method of power control, comprising:
the UE calculates a first transmission power value P1 according to the power control parameter issued by the base station;
the UE receives a second transmission power value P2 and a third transmission power value P3 sent by CPE and determines the final transmission power according to the P1, the P2 and the P3; or the UE receives a fourth power value P4 sent by CPE and determines the final transmission power according to the P1 and the P4;
wherein, the UE refers to user equipment; the CPE refers to user terminal equipment; the P1 refers to a transmission power value of each UE, the P2 refers to a constrained transmission power value allocated to each UE by a CPE, the P3 refers to an actual maximum transmission power value of each UE, and the P4 refers to a minimum value of the P2 and the P3;
the UE determining a final transmit power from the P1, P2, P3 comprises: the UE comparing the P2 with the P3; if the P2 is greater than the P3, the UE selects the minimum value from the P1 and the P3 and takes the selected minimum value as the final transmission power; if the P2 is smaller than the P3, the UE selects the minimum value from the P1 and the P2 and takes the selected minimum value as the final transmission power;
the UE determining a final transmit power from the P1, P4 comprises: the UE comparing the P1 with the P4; if the P1 is greater than the P4, the UE treats the P4 as a final transmit power; if the P1 is less than the P4, the UE treats the P1 as the final transmit power.
2. The method of claim 1, the second transmit power value P2 comprising:
the CPE determines the number of resource elements occupied by each UE, the total number of users and the total number of resource blocks which are required to be scheduled by the CPE according to the current scheduling information of the base station;
the CPE calculates the total number of the resource elements occupied by all the UE according to the determined number of the resource elements occupied by each UE, the total number of the users needing to be scheduled by the CPE and the total number of the resource blocks;
the CPE calculates the average transmitting power distributed by each resource element according to the maximum transmitting power and the total number of the resource elements occupied by all the UE;
and the CPE determines the P2 according to the calculated number of the resource elements occupied by each UE and the calculated average transmission power distributed to each resource element.
3. The method of claim 1, the third transmit power value P3 comprising:
the CPE receives the maximum transmitting power of each UE issued by the base station;
the CPE determines the total number of users needing scheduling according to the current scheduling information of the base station;
the CPE determines the P3 based on its maximum transmit power, the determined total number of users, and the received maximum transmit power for each UE.
4. A power control apparatus comprising:
the calculation module is used for calculating a first transmission power value P1 according to the power control parameter issued by the base station;
a determining module, configured to receive a second transmission power value P2 and a third transmission power value P3 sent by a CPE, and determine a final transmission power according to the P1, the P2, and the P3; or receiving a fourth power value P4 sent by the CPE and determining the final transmission power according to the P1 and the P4;
wherein, the CPE refers to user terminal equipment; the P1 refers to a transmission power value of each UE, the P2 refers to a constrained transmission power value allocated to each UE by a CPE, the P3 refers to an actual maximum transmission power value of each UE, and the P4 refers to a minimum value of the P2 and the P3;
the determining module comprises: a first comparing unit for comparing the P2 with the P3; a first determining unit, configured to select a minimum value from the P1 and the P3 and use the selected minimum value as a final transmit power when the P2 is greater than the P3, and select a minimum value from the P1 and the P2 and use the selected minimum value as a final transmit power when the P2 is less than the P3;
the determining module comprises: a second comparing unit for comparing the P1 with the P4; a second determining unit, configured to determine the P4 as a final transmit power when the P1 is greater than the P4, and determine the P1 as a final transmit power when the P1 is less than the P4.
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