Channel simulation device and channel simulation program

• US 10,355,794 B2
• Filed: 05/22/2015
• Issued: 07/16/2019
• Est. Priority Date: 05/22/2015
• Status: Active Grant

• Current Assignee: TOA Corporation
• Original Assignee: TOA Corporation
• Inventors: Mori, Katsuhiro
• Primary Examiner(s): Rego, Dominic E
• Application Number:
  US15/574,402
• Publication Number:
  US 20180138997A1
• Time in Patent Office: 1,516 Days
• CPC Class Codes: H04B 1/04 Circuits
• CPC Class Codes: H04B 17/391 Modelling the propagation channel
• CPC Class Codes: H04B 17/3912 Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

This channel simulation device is provided with a memory for storing a distance calculation parameter and reception strength calculation parameter, and a processor for estimating desired-wave reception strength and interfering-wave reception strength on the basis of the distance calculation parameter and the reception strength calculation parameter. The desired-wave reception strength refers, for each set of two areas selected from a plurality of areas, to reception strength when a transmission signal transmitted from the wireless microphone of one area is received by a receiver in the one area. The interfering-wave reception strength refers to reception strength when a transmission signal transmitted from the wireless microphone of the other area is received by the receiver in the one area.

Claims

1. A channel simulation device comprising:

a memory configured to store at least one distance calculation parameter for calculating distances between multiple wireless microphones and a receiver in multiple areas in which the multiple wireless microphones and the receiver are used, and at least one reception strength calculation parameter for estimating reception strengths when transmission signals transmitted from the wireless microphones are received by the receiver; and

a processor configured to estimate, for each set of two areas selected from the multiple areas, a desired-wave reception strength when a transmission signal transmitted from a wireless microphone in one area of the two areas is received by the receiver in the one area and an interference-wave reception strength when a transmission signal transmitted from a wireless microphone in the other area of the two areas is received by the receiver in the one area, based on the distance calculation parameter and the reception strength calculation parameter.

2. The channel simulation device according to claim 1, wherein the processor is configured to perform a channel determination, for each set of two areas selected from the multiple areas, as to whether or not interference occurs between the two areas based on the difference between the desired-wave reception strength and the interference-wave reception strength.

3. The channel simulation device according to claim 2, wherein the memory is configured to store a group of channels set at a predetermined frequency interval, and wherein the processor is configured to select one or more channels that can be assigned to one or more areas from the group of channels based on the channel determination.

4. The channel simulation device according to claim 2, further comprising an input device through which a user input operation is received,

wherein the memory is configured to store a group of channels set at a predetermined frequency interval and number information which is input through an input operation received at the input device and indicates the number of wireless microphones set in each of the multiple areas, and

wherein the processor is configured to select one or more channels that can be assigned to the areas based on the channel determination and the number information.

5. The channel simulation device according to claim 2, further comprising an input device through which a user input operation is received,

wherein the memory is configured to store a group of channels set at a predetermined frequency interval, and

wherein the processor is configured to, when the input device receives a selection operation for selecting a channel from the group of channels, determine whether or not the selected channel can be assigned to any one of the areas based on the channel determination.

6. The channel simulation device according to claim 2, further comprising an input device through which a user input operation is received,

wherein the memory is configured to store a group of channels set at a predetermined frequency interval, and

wherein the processor is configured to, when the input device receives a first selection operation for selecting a channel from the group of channels and a second selection operation for selecting an area from the multiple areas, determine whether or not the selected channel can be assigned to the selected area based on the channel determination.

7. The channel simulation device according to claim 1, wherein the memory is configured to store, as the reception strength calculation parameter, a propagation loss parameter for deriving reception strength according to the distance between the wireless microphone and the receiver.

8. The channel simulation device according to claim 1, wherein the memory is configured to store, as the reception strength calculation parameter, an obstacle parameter indicating attenuation amount of the signal strength of the transmission signal to be attenuated when the transmission signal passes through an obstacle.

9. The channel simulation device according to claim 8, wherein the memory is configured to store the obstacle parameter that is set individually for each obstacle material.

10. The channel simulation device according to claim 1, further comprising an input device through which a user input operation is received,

wherein the processor is configured to output a layout image showing the layout of a building on a display device, receive an obstacle specifying operation for specifying the range or arrangement of obstacles arranged between multiple areas or within an area in the output layout image, and store an obstacle arrangement parameter indicating the range or arrangement of the obstacles based on the range or arrangement specified by the obstacle specifying operation as the reception strength calculation parameter in the memory.

11. The channel simulation device according to claim 1, further comprising an input device through which a user input operation is received,

wherein the processor is configured to output a layout image showing the layout of a building, receive a specifying operation for specifying the range or arrangement of the multiple areas within the output image, and store the distance calculation parameter based on the range or arrangement specified by the specifying operation in the memory.

12. The channel simulation device according to claim 1, wherein the processor is configured to:

when estimating the desired-wave reception strength, estimate the reception strength when a transmission signal transmitted from the wireless microphone in the one area is received by the receiver for each of multiple arrangement points at which the receiver is expected to be installed in the one area, use one selected from the multiple estimated reception strengths according to a rule as the desired-wave reception strength, and

when estimating the interference-wave reception strength, estimate the reception strength when a transmission signal transmitted from the wireless microphone in the other area is received by the receiver for each of multiple arrangement points at which the receiver is expected to be installed in the one area, and use one selected from the multiple estimated reception strengths according to a rule as the interference-wave reception strength.

13. The channel simulation device according to claim 1, wherein the processor is configured to:

when estimating the desired-wave reception strength, estimate the reception strength when a transmission signal transmitted from the wireless microphone in the one area is received by the receiver for each of multiple arrangement points at which the wireless microphones are expected to be used in the one area, use one selected from the multiple estimated reception strengths according to a rule as the desired-wave reception strength, and

when estimating the interference-wave reception strength, estimate the reception strength when a transmission signal transmitted from the wireless microphone in the other area is received by the receiver for each of multiple arrangement points at which the wireless microphones are expected to be used in the one area, and use one selected from the multiple estimated reception strengths according to a rule as the interference-wave reception strength.

14. A non-transitory computer-readable storage media having computer executable instructions stored thereon that, when executed by a computer, cause the computer to perform:

a first processing for reading out of a memory at least one distance calculation parameter for calculating the distances between multiple wireless microphones and a receiver in multiple areas in which the multiple wireless microphones and the receiver are used and at least one reception strength calculation parameter for estimating reception strengths when transmission signals transmitted from the wireless microphones are received by the receiver, and

a second processing for estimating, for each set of two areas selected from the multiple areas, a desired-wave reception strength when a transmission signal transmitted from a wireless microphone in one area of the two areas is received by the receiver in the one area and an interference-wave reception strength when a transmission signal transmitted from a wireless microphone in the other area is received by the receiver in the one area, based on the distance calculation parameter and the reception strength calculation parameter.