Scalable test model for cellular communication system that supports different bandwidth and subcarrier spacing combinations

Patent metadata

Field	Value
Publication number	US-11496909-B2
Application number	US-201917251332-A
Country	US
Kind code	B2
Filing date	Jun 11, 2019
Priority date	Jun 11, 2018
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

Systems and methods for a scalable test model for a cellular communications system having multiple different bandwidth and subcarrier combinations are disclosed. Embodiments of a method performed by a test node and corresponding embodiments of a test node are disclosed. In some embodiments, a method performed by a test node comprises generating a test signal for a particular bandwidth and subcarrier spacing combination, the test signal being in accordance with a test model that is scalable for a plurality of different bandwidth and subcarrier spacing combinations. By using the scalable test model, the test model can be flexibly used to test for different bandwidth and subcarrier spacing combinations.

First claim

What is claimed is:

1. A method performed by a test node, the method comprising:
generating a test signal for a particular bandwidth and subcarrier spacing combination, the test signal being in accordance with a test model that is scalable for a plurality of different bandwidth and subcarrier spacing combinations;
wherein the test signal comprises a first number of spaces filled by a first component and a second number of spaces filled by a second component;
the first component being a Physical Downlink Control Channel, PDCCH, component and the first number of spaces being a fixed number of control channel elements, CCEs;
the second component being a Physical Downlink Shared Channel, PDSCH, component and the second number of spaces being a number of resource blocks, RBs, that is scalable based on a bandwidth configuration.

2. The method of claim 1 wherein the fixed number of CCEs is 1.

3. The method of claim 1 wherein the second component is substantially similar to the first component according to an amplitude statistics criterion.

4. The method of claim 3 wherein the amplitude statistics criterion is a Rayleigh distribution or a Complementary Cumulative Distribution Function, CCDF, curve.

5. The method of claim 1 wherein the second number of spaces is a remaining number of RBs allowed by the particular bandwidth and subcarrier spacing combination.

6. The method of claim 1 wherein only PDSCH, PDCCH, and one or more selected reference signals are included in the scalable test model.

7. The method of claim 1 wherein the test model is such that there is up to floor(BW_in_PRB/(6AL)) Physical Downlink Control Channels, PDCCHs, in one Orthogonal Frequency Division Multiplexing, OFDM, symbol of the test signal, where BW_in_PRB is a bandwidth of the test signal expressed as a number of Physical Resource Blocks, PRBs, and 6AL is a number of Resource Blocks, RBs, that is equal to 6 times an Aggregation Level, AL, used for the PDCCHs.

8. The method of claim 1 wherein the test model is such that, when the bandwidth of the test signal is less than 6AL Resource Blocks, RBs, where 6AL is equal to 6 times an Aggregation Level, AL, used for a Physical Downlink Control Channel, PDCCH, in the test signal, the test signal comprises only one PDCCH, and this one PDCCH is distributed over a number of Orthogonal Frequency Division Multiplexing, OFDM, symbols that is equal to:
ceil(6AL/BW_in_RB_rounded_down_to_next_multiple_of_6RB), where BW_in_RB_rounded_down_to_next_multiple_of_6RB is the bandwidth of the test signal expressed as a number of RBs rounded down to a next multiple of 6 RBs.

9. A test node, comprising:
processing circuitry operable to cause the test node to generate a test signal for a particular bandwidth and subcarrier spacing combination, the test signal being in accordance with a test model that is scalable for a plurality of different bandwidth and subcarrier spacing combinations;
wherein the test signal comprises a first number of spaces filled by a first component and a second number of spaces filled by a second component;
the first component being a Physical Downlink Control Channel, PDCCH, component and the first number of spaces being a fixed number of control channel elements, CCEs;
the second component being a Physical Downlink Shared Channel, PDSCH, component and the second number of spaces being a number of resource blocks, RBs, that is scalable based on a bandwidth configuration.

10. The test node of claim 9 wherein the test node is part of a radio node.

11. The test node of claim 9 wherein the test node is emulated by test equipment that is external to a radio node that is used to transmit the test signal.

12. The test node of claim 11 wherein the processing circuitry is further operable to provide the test signal to the radio node for transmission by the radio node.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Sienkiewicz Esther
• Negusse Senay
• Chapman Thomas
• Baldemair Robert
• Ghasemzadeh Farshid

Classifications

• H04B17/10 Primary

  of transmitters · CPC title

• H04B17/3912

  Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region · CPC title

• H04B17/0085

  using test signal generators · CPC title

• H04W24/06

  Testing, {supervising or monitoring} using simulated traffic · CPC title

• H04B17/13

  of power amplifiers, e.g. gain or non-linearity · CPC title