CN102487300B - Method and system for testing maximum transmitting power of multi-antenna user device - Google Patents
Method and system for testing maximum transmitting power of multi-antenna user device Download PDFInfo
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Abstract
The invention discloses a method and a system for testing a maximum transmitting power of a multi-antenna user device. The method comprises the following steps that: a testing parameter can be sent to a user device after being initialized, and a user device comprehensive SIR (Signal to Interference Ratio) can be obtained according to the response of the user device for the testing parameter; and ports of at least two transmitting antennas of the user device can be respectively subjected to power control according to the comparing of the user device comprehensive SIR and a system limit SIR so as to obtain the maximum transmitting power. A power gain adjusting module in the system is used for sending the testing parameter to the user device, the user device comprehensive SIR can be obtained according to a merging result returned by a merging module, and the ports of the at least two transmitting antennas of the user device are respectively subjected to the power control according to the comparing of the user device comprehensive SIR and the system limit SIR so as to obtain the maximum transmitting power for the user device. By adopting the method and the system which are disclosed by the invention, the testing for the maximum transmitting power of the user device with two or more than two transmitting antennas can be realized.
Description
Technical Field
The present invention relates to testing technologies, and in particular, to a method and a system for testing maximum transmit power of multi-antenna user equipment.
Background
In recent years, various theoretical studies show that the space-time signal processing technology of the mimo system using multiple antennas at the transmitting end and the receiving end can meet the requirements of various multimedia services for high data rate and high spectrum performance in the future wireless mobile communication. The multi-antenna technology becomes one of the key technologies of future mobile communication standards, such as Long Term Evolution (LTE) of the third generation mobile communication partnership project, institute of electrical and electronics engineers broadband access standard 802.16e, european future communication standard Winner.
The maximum transmission power of the user equipment is an index used to measure its maximum transmission capability, and the compression power point is the capability of its transmission power to increase with the input power. When the user equipment transmission power exceeds the allowed maximum transmission power, other channels can be interfered, and when the user equipment transmission power cannot reach the required maximum transmission power, the coverage area can be reduced. In LTE Rel8, LTE Rel9, a user equipment has one transmit antenna, and as the protocol evolves, in LTE Rel10, a user equipment has more than two transmit antennas. Since the existing maximum transmission power test technology is suitable for the user equipment in LTE Rel8, LTE Rel9, and not fully suitable for the user equipment in LTE Rel10, a new maximum transmission power test evaluation solution is required for such Rel10 user equipment.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and a system for testing the maximum transmit power of a multi-antenna user equipment, which can implement the maximum transmit power test of a user equipment with two or more transmit antennas.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for testing maximum transmitting power of multi-antenna user equipment comprises the following steps: after the test parameters are initialized, the test parameters are sent to the user equipment, and the comprehensive signal-to-interference ratio of the user equipment is obtained according to the response of the user equipment to the test parameters; and respectively carrying out power control on ports of at least two transmitting antennas of the user equipment according to the comparison between the comprehensive signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio to obtain the maximum transmitting power of the user equipment.
Wherein the UE integrated SIR comprises: signal-to-interference ratios of different antenna connectors of the user equipment and the user equipment signal-to-interference ratio;
the step of respectively performing power control on the ports of the at least two transmitting antennas of the user equipment according to the comparison between the integrated signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio specifically comprises the following steps:
when the obtained comprehensive signal-to-interference ratio of the user equipment is smaller than the system limit signal-to-interference ratio, sending a power control signaling containing an indication of increasing the power to the user equipment, and informing the user equipment of increasing the power change of one step length;
when the obtained comprehensive signal-to-interference ratio of the user equipment is greater than the system limit signal-to-interference ratio, sending a power control signaling containing an indication of reducing power to the user equipment, and informing the user equipment of reducing the power change of one step length;
and when the obtained comprehensive signal-to-interference ratio of the user equipment is equal to the system limit signal-to-interference ratio, sending a power control signaling containing an indication of power maintenance to the user equipment, and informing the user equipment to maintain the current transmission power unchanged.
Wherein, obtaining the maximum transmission power of the user equipment specifically includes: according to the power control, the maximum transmitting power of each port of the ports of at least two transmitting antennas of the user equipment can be obtained; and summing the maximum transmission power of each port to obtain the maximum transmission power of the user equipment.
A system for testing maximum transmit power of a multi-antenna user equipment, the system comprising: the device comprises a parameter initialization and setting module, a power gain adjusting module and a merging module; wherein,
the parameter initialization and setting module is used for initializing and setting test parameters;
the power gain adjustment module is used for sending the test parameters to the user equipment and obtaining the comprehensive signal-to-interference ratio of the user equipment according to the combination result returned by the combination module; respectively carrying out power control on ports of at least two transmitting antennas of the user equipment according to the comparison between the comprehensive signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio, so that the user equipment obtains the maximum transmitting power;
and the merging module is used for merging the responses of the user equipment to the test parameters and returning the merging result to the power gain adjustment module.
Wherein the UE integrated SIR comprises: signal-to-interference ratios of different antenna connectors of the user equipment and the user equipment signal-to-interference ratio;
the power gain adjustment module further comprises: a signal-to-interference ratio estimation submodule, a power change step length determination submodule and a power gain determination submodule; wherein,
the signal-to-interference ratio estimation submodule is used for obtaining the comprehensive signal-to-interference ratio of the user equipment according to the signal transmitting power of the user equipment, which is responded by the user equipment aiming at the test parameters, after the test parameters are sent to the user equipment;
a power change step length determining submodule, configured to determine a power change step length of next signal transmission power of the user equipment according to the obtained user equipment integrated signal-to-interference ratio and system limit signal-to-interference ratio;
and the power gain determination submodule is used for respectively carrying out power control on ports of at least two transmitting antennas of the user equipment according to the comparison between the comprehensive signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio so that the user equipment obtains the maximum transmitting power.
The power gain determining submodule is further configured to send a power control signaling containing an instruction to increase power to the user equipment when the obtained integrated signal-to-interference ratio of the user equipment is smaller than the system limit signal-to-interference ratio, and notify the user equipment of increasing the power change of one step according to the power change step determined by the power change step determining submodule; when the obtained comprehensive signal-to-interference ratio of the user equipment is greater than the system limit signal-to-interference ratio, sending a power control signaling containing an indication of reducing power to the user equipment, determining the power change step length determined by the submodule according to the power change step length, and informing the user equipment of reducing the power change of one step length; and when the obtained comprehensive signal-to-interference ratio of the user equipment is equal to the system limit signal-to-interference ratio, sending a power control signaling containing an indication of power maintenance to the user equipment, and informing the user equipment to maintain the current transmission power unchanged.
Test parameters are sent to user equipment after being initialized, and the comprehensive signal-to-interference ratio of the user equipment is obtained according to the response of the user equipment to the test parameters; and respectively carrying out power control on ports of at least two transmitting antennas of the user equipment according to the comparison between the comprehensive signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio to obtain the maximum transmitting power of the user equipment. By adopting the invention, the maximum transmission power test of the user equipment with two or more than two transmission antennas can be realized.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of the method of the present invention;
FIG. 2 is a schematic diagram of a configuration of a system according to an embodiment of the present invention when connected to a UE;
fig. 3 is a schematic diagram of a structure of the power gain adjustment module in fig. 2.
Detailed Description
The basic idea of the invention is: after the test parameters are initialized, the test parameters are sent to the user equipment, and the comprehensive signal-to-interference ratio of the user equipment is obtained according to the response of the user equipment to the test parameters; and respectively carrying out power control on ports of at least two transmitting antennas of the user equipment according to the comparison between the comprehensive signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio to obtain the maximum transmitting power of the user equipment.
The following describes the embodiments in further detail with reference to the accompanying drawings.
The scheme of the invention is suitable for the maximum transmission power test of the user equipment with two or more than two transmission antennas, such as the maximum transmission power test of the user equipment of E-UTRAN, the maximum transmission power test of the user equipment of LTE Rel10, and the maximum transmission power test of the user equipment of wimax or even wifi. Conformance testing of multiple transmit antenna user equipment can be facilitated.
A method for testing the maximum transmitting power of multi-antenna user equipment mainly comprises the following steps:
firstly, after a test system and user equipment are connected, test parameters are initialized and set.
Here, the test parameters are a set of configuration parameters that are needed for the user equipment test, and include a test state in which the test system located in the base station controller is connected to the user equipment correctly. A base Station Simulator (SS) may be used to simulate the functionality of the base station controller. The test parameters further include: testing the operating environment conditions, carrier frequency, channel bandwidth requirements to meet standard requirements.
Here, after the SS is connected to the antenna connector of the ue, when initializing and setting the test parameters, the cell parameters may be set, the downlink signal may be initialized, the uplink reference measurement channel may be initialized, and the channel propagation conditions may be initialized. The test is performed to ensure that there is no other white gaussian noise, no fading and no multipath effects between the SS and the ue. The user equipment is ensured to be in a certain standard state. The term "a certain standard state" means that different standards may require different state settings, and what is said herein is to ensure that the user equipment state is set according to a certain standard, such as the requirements of the 3GPP LTE standard or the requirements of WIMAX on the terminal test state.
And secondly, adjusting the maximum transmitting power of each port of the multi-antenna user equipment in the test process.
The test process comprises the following steps:
a. and sending uplink scheduling information for each uplink transmission process through a Physical Downlink Control Channel (PDCCH), wherein a scheduled uplink reference measurement channel is set according to a standard protocol.
When the user equipment has no load and no loop data, the UE sends uplink interpolation bits on an uplink reference measurement channel.
b. Sending power control signaling in scheduling information for user equipment to make each antenna port of UE reach maximum transmitting power level, namely obtaining maximum transmitting power of different ports, then calculating sum of two ports to obtain maximum output power (including sum of two radio frequency powers) output by UE to reach maximum transmitting power level.
c. The measurement UE measures the UE average power in a certain bandwidth in a certain radio access mode, and the measurement period should be continuous in each subframe. No measurements are made during the transition time slot of TDD mode. A test system for the maximum transmitting power of multi-antenna user equipment mainly comprises a parameter initialization and setting module, a power gain adjusting module and a merging module. The parameter initialization and setting module is used for initializing and setting test parameters, and the test parameters comprise a test scene, a carrier frequency, a channel bandwidth, cell parameter setting, an uplink and downlink signal, an uplink measurement channel, a channel propagation condition and the like which are defined according to standard requirements. The power gain adjustment module is used for controlling the ports of the two transmitting antennas of the user equipment respectively and informing the user equipment of adjusting the power of the port of each transmitting antenna. Considering that the user equipment has a plurality of transmitting antenna ports, the combining module is used for combining the signal power transmitted by the user equipment and sending the combined result to the power gain adjusting module.
The invention is illustrated below.
The method comprises the following steps: a process for testing the maximum transmit power of a user equipment having two transmit antennas is shown in fig. 1, and includes the following steps:
step 101, connecting the test system and the user equipment.
Step 102, initializing test parameters.
Here, the initialization of the test parameters includes: the initialization of a test scene, a carrier frequency, a channel bandwidth, cell parameter setting, an uplink and downlink signal, an uplink measurement channel, a channel propagation condition and the like is defined according to standard requirements.
And 103, sending uplink scheduling information for each uplink transmission process through the PDCCH.
Here, the scheduled uplink reference measurement channel is set according to a standard protocol setting modulation scheme, resource allocation, and the like.
And step 104, respectively controlling ports of two transmitting antennas of the user equipment to obtain the maximum transmitting power of each port.
Here, the step is controlled according to the comparison between the integrated signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio. Specifically, when the estimated integrated signal-to-interference ratio of the user equipment is smaller than the system limit signal-to-interference ratio, the test system sends a power control signaling (including an indication for increasing power) to the user equipment so as to inform the user equipment of increasing the current transmission power by one step of power change; when the estimated integrated signal-to-interference ratio of the user equipment is larger than the system limit signal-to-interference ratio, the test system sends a power control signaling (containing an indication of power reduction) to the user equipment so as to inform the user equipment to reduce the current transmission power by one power step; when the estimated integrated signal-to-interference ratio of the user equipment is equal to the system limit signal-to-interference ratio, the test system sends power control signaling (containing an indication of power maintenance) to the user equipment so as to inform the user equipment to maintain the current transmission power unchanged.
Wherein the UE integrated SIR comprises: signal to interference ratios of different antenna connectors of the user equipment and user equipment signal to interference ratios. It should be added that: the signal-to-interference ratio is the ratio of the power of the useful signal received by the user equipment to the power of the interference signal, and the reference point is the antenna connector of the user equipment.
Step 105, summing up the transmission power achievable by the ports of the two transmission antennas of the user equipment, and obtaining the maximum transmission power level to the user equipment when the maximum transmission power of the user equipment cannot be increased.
And 106, circularly measuring the average transmitting power of the user equipment under a certain bandwidth by the user equipment.
Here, for a certain bandwidth, the test includes different uplink bandwidths, for example, the 3GPP LTE bandwidth includes 1..4, 5, 10, 15, 20M, and so on.
And step 107, completing the measurement of the maximum transmitting power.
The embodiment of the system is as follows: a test system for testing the maximum transmit power of user equipment having two transmit antennas.
As shown in fig. 2, the test system includes: the device comprises a parameter initialization and setting module, a power gain adjusting module, a merging module and a maximum power testing module. The parameter initialization and setting module is used for initializing and setting test parameters, and the test parameters comprise a test scene, a carrier frequency, a channel bandwidth, cell parameter setting, an uplink and downlink signal, an uplink measurement channel, a channel propagation condition and the like which are defined according to standard requirements. The power gain adjustment module is used for controlling the ports of the two transmitting antennas of the user equipment respectively and informing the user equipment of adjusting the power of the port of each transmitting antenna. Considering that the user equipment has multiple transmit antenna ports, the combining module is configured to combine responses of the user equipment to the test parameters, that is, combine signal powers transmitted by the user equipment, and send a combination result to the power gain adjusting module. The maximum power test module is used for counting the test results and finally outputting the test results.
For the power gain adjustment module, as shown in fig. 3, the power gain adjustment module includes a signal-to-interference ratio estimation sub-module, a power change step size determination sub-module, and a power gain determination sub-module. The signal-to-interference ratio estimation submodule is used for sending the test parameters to user equipment (such as a mobile terminal) and estimating the comprehensive signal-to-interference ratio of the user equipment according to the response of the user equipment.
And the power change step length determining module is used for determining the next power change step length according to the estimated integrated signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio. The power gain determination submodule is used for sending a power control signaling (containing an instruction for increasing power) to the user equipment by the test system when the estimated comprehensive signal-to-interference ratio of the user equipment is smaller than the system limit signal-to-interference ratio so as to inform the user equipment of increasing the current transmission power by one step of power change; when the estimated integrated signal-to-interference ratio of the user equipment is larger than the system limit signal-to-interference ratio, the test system sends a power control signaling (containing an indication of power reduction) to the user equipment so as to inform the user equipment to reduce the current transmission power by one power step; when the estimated integrated signal-to-interference ratio of the user equipment is equal to the system limit signal-to-interference ratio, the test system sends power control signaling (containing an indication of power maintenance) to the user equipment so as to inform the user equipment to maintain the current transmission power unchanged.
Under the condition of changing the power gain, the power gain adjusting module transmits signals for a plurality of times to determine the power gain until the power gain is kept unchanged.
The transmitting power of the test system passes through the loopback device to obtain the signal power received by the user equipment, and then the test system can adjust the transmitting power of the user equipment.
If there are more than two transmit antennas of user equipment, the test system can be extended using the same principles as described above for the two transmit antennas of user equipment test.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (6)
1. A method for testing maximum transmission power of multi-antenna user equipment is characterized in that the method comprises the following steps: after the test parameters are initialized, the test parameters are sent to the user equipment, and the comprehensive signal-to-interference ratio of the user equipment is obtained according to the response of the user equipment to the test parameters; respectively carrying out power control on ports of at least two transmitting antennas of the user equipment according to the comparison between the comprehensive signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio to obtain the maximum transmitting power of the user equipment;
wherein the UE integrated SIR comprises: signal to interference ratios of different antenna connectors of the user equipment and user equipment signal to interference ratios.
2. The method of claim 1, wherein performing power control on the ports of at least two transmit antennas of the user equipment according to the comparison between the integrated signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio comprises:
when the obtained comprehensive signal-to-interference ratio of the user equipment is smaller than the system limit signal-to-interference ratio, sending a power control signaling containing an indication of increasing the power to the user equipment, and informing the user equipment of increasing the power change of one step length;
when the obtained comprehensive signal-to-interference ratio of the user equipment is greater than the system limit signal-to-interference ratio, sending a power control signaling containing an indication of reducing power to the user equipment, and informing the user equipment of reducing the power change of one step length;
and when the obtained comprehensive signal-to-interference ratio of the user equipment is equal to the system limit signal-to-interference ratio, sending a power control signaling containing an indication of power maintenance to the user equipment, and informing the user equipment to maintain the current transmission power unchanged.
3. The method of claim 2, wherein obtaining the maximum transmit power of the UE specifically comprises: according to the power control, the maximum transmitting power of each port of the ports of at least two transmitting antennas of the user equipment can be obtained; and summing the maximum transmission power of each port to obtain the maximum transmission power of the user equipment.
4. A system for testing maximum transmit power of multi-antenna user equipment, the system comprising: the device comprises a parameter initialization and setting module, a power gain adjusting module and a merging module; wherein,
the parameter initialization and setting module is used for initializing and setting test parameters;
the power gain adjustment module is used for sending the test parameters to the user equipment and obtaining the comprehensive signal-to-interference ratio of the user equipment according to the combination result returned by the combination module; respectively carrying out power control on ports of at least two transmitting antennas of the user equipment according to the comparison between the comprehensive signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio, so that the user equipment obtains the maximum transmitting power; wherein the UE integrated SIR comprises: signal-to-interference ratios of different antenna connectors of the user equipment and the user equipment signal-to-interference ratio;
and the merging module is used for merging the responses of the user equipment to the test parameters and returning the merging result to the power gain adjustment module.
5. The system of claim 4, wherein the power gain adjustment module further comprises: a signal-to-interference ratio estimation submodule, a power change step length determination submodule and a power gain determination submodule; wherein,
the signal-to-interference ratio estimation submodule is used for obtaining the comprehensive signal-to-interference ratio of the user equipment according to the signal transmitting power of the user equipment, which is responded by the user equipment aiming at the test parameters, after the test parameters are sent to the user equipment;
a power change step length determining submodule, configured to determine a power change step length of next signal transmission power of the user equipment according to the obtained user equipment integrated signal-to-interference ratio and system limit signal-to-interference ratio;
and the power gain determination submodule is used for respectively carrying out power control on ports of at least two transmitting antennas of the user equipment according to the comparison between the comprehensive signal-to-interference ratio of the user equipment and the system limit signal-to-interference ratio so that the user equipment obtains the maximum transmitting power.
6. The system of claim 5, wherein the power gain determining sub-module is further configured to send a power control signaling containing an indication to increase power to the ue when the obtained integrated signal-to-interference ratio of the ue is smaller than a system limit signal-to-interference ratio, and notify the ue of increasing the power change of one step according to the power change step determined by the power change step determining sub-module; when the obtained comprehensive signal-to-interference ratio of the user equipment is greater than the system limit signal-to-interference ratio, sending a power control signaling containing an indication of reducing power to the user equipment, determining the power change step length determined by the submodule according to the power change step length, and informing the user equipment of reducing the power change of one step length; and when the obtained comprehensive signal-to-interference ratio of the user equipment is equal to the system limit signal-to-interference ratio, sending a power control signaling containing an indication of power maintenance to the user equipment, and informing the user equipment to maintain the current transmission power unchanged.
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| CN101068120A (en) * | 2006-11-23 | 2007-11-07 | 中兴通讯股份有限公司 | Maximum transmission power testing device and method |
| CN101154969A (en) * | 2006-09-28 | 2008-04-02 | 联想(北京)有限公司 | Method for confirming actual emission power of transmitter |
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| CN101154969A (en) * | 2006-09-28 | 2008-04-02 | 联想(北京)有限公司 | Method for confirming actual emission power of transmitter |
| CN101068120A (en) * | 2006-11-23 | 2007-11-07 | 中兴通讯股份有限公司 | Maximum transmission power testing device and method |
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| Title |
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