System and method for managing utilization of un-licensed frequency spectrum resources for secondary systems, and a non-transitory computer-readable medium

• US 10,455,428 B2
• Filed: 05/30/2014
• Issued: 10/22/2019
• Est. Priority Date: 05/30/2013
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Guo, Xin, Sun, Chen
• Primary Examiner(s): Sciacca, Scott M
• Application Number:
  US14/787,694
• Publication Number:
  US 20160088485A1
• Time in Patent Office: 1,971 Days
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/16 Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]

Abstract

A system and method for managing utilization of un-licensed frequency spectrum resources for secondary systems, a system and a method for the system, and a non-transitory computer-readable medium including computer-readable instructions. The system for managing utilization of un-licensed frequency spectrum resources for secondary systems includes: circuitry, configured to assign a first un-licensed frequency spectrum resource in an availability time period to a first secondary system and reassign at least part of the first un-licensed frequency spectrum resource during the availability time period based on current resource utilization, wherein the circuitry is configured to assign and reassign the first un-licensed frequency spectrum resource under protection of a primary system which is licensed with the un-licensed frequency spectrum resources.

Claims

1. A system for managing utilization of un-licensed frequency spectrum resources for secondary systems, comprising:

a memory; and

processing circuitry configured to access the memory and

assign a first un-licensed frequency spectrum resource in an availability time period to a first secondary system, the first un-licensed frequency spectrum resource being available for wireless transmission of the first secondary system during the availability time period and under interference constraints;

determine whether one or more other secondary systems require at least part of the assigned first un-licensed frequency spectrum resource;

in response to a determination that the one or more other secondary systems require the at least part of the first un-licensed frequency spectrum resource, reconfigure operational parameters of the first secondary system to reassign the at least part of the first un-licensed frequency spectrum resource to a second secondary system during the availability time period based on current resource utilization, the operational parameters include available frequency and associated maximum transmit power; and

receive a request for an un-licensed frequency spectrum resource from a third secondary system, reassign a second un-licensed frequency spectrum resource occupied by the second secondary system to the third secondary system, and reassign the at least part of the first un-licensed frequency spectrum resource to the second secondary system if the at least part of the first un-licensed frequency spectrum resource cannot be reassigned to the third secondary system for causing intolerable interference to other systems,

wherein the circuitry is configured to assign and reassign the first un-licensed frequency spectrum resource under protection of a primary system which is licensed with the un-licensed frequency spectrum resources.

2. The system according to claim 1, wherein the circuitry is configured to reassign the at least part of the first un-licensed frequency spectrum resource during the availability time period to a second secondary system based on the current resource utilization by the first and the second secondary systems.

3. The system according to claim 2, wherein the circuitry is configured to control interference to other secondary systems when reassigning the at least part of first un-licensed frequency spectrum resource to the second secondary system.

4. The system according to claim 2, wherein the circuitry is configured to reassign the first un-licensed frequency spectrum resource to the second secondary system based on location of the second secondary system.

5. The system according to claim 4, wherein

the circuitry is configured to identify, before assigning the at least part of the first un-licensed frequency spectrum resources to the second secondary system and based on the location, that the at least part of the first un-licensed frequency spectrum resource is available to the second secondary system, and

the at least part of the first un-licensed frequency spectrum resource is available to the second secondary system when utilization of the at least part of the first un-licensed frequency spectrum resource by the second secondary system at the location causes interference under tolerance of the primary system.

6. The system according to claim 5, wherein the circuitry is configured to

determine an available frequency spectrum resource of the second secondary system, and

identify the at least part of first un-licensed frequency spectrum resource available to the second secondary system if the at least part of first un-licensed frequency spectrum resource is comprised in the available frequency spectrum resource, and

the available frequency spectrum resource comprises frequencies and associated maximum transmit power calculated based on the location, which can be used by the second secondary system under protection of the primary system.

7. The system according to claim 5, wherein the at least part of the first un-licensed frequency spectrum resource is available to the second secondary system when utilization of the at least part of the first un-licensed frequency spectrum resource by the second secondary system at the location causes interference under tolerance of the primary system and other secondary systems.

8. The system according to claim 4, wherein the circuitry is configured to

receive a request for un-licensed frequency spectrum resource from the second secondary system, and

determine the second secondary system as an object to reassign the at least part of the first un-licensed frequency spectrum resource to.

9. The system according to claim 1, wherein the circuitry is configured to

determine the current resource utilization of the first un-licensed frequency spectrum resource by the first secondary system, and

reassign the at least part of the first un-licensed frequency spectrum resource in case that the at least part of the first un-licensed frequency spectrum resource is unused by the secondary system.

10. The system according to claim 9, wherein the at least part of the first un-licensed frequency spectrum resource is released by the first secondary system before the availability time period expires.

11. The system according to claim 1, wherein the circuitry is configured to assign available frequency and associated maximum transmit power to the first secondary system as the first un-licensed frequency spectrum resource without intolerable interference to the primary system.

12. The system according to claim 1, wherein the circuitry is configured to transmit, to the first secondary system, spectrum adjustment information that indicates the at least part of the first un-licensed frequency spectrum resource is no longer available to the first secondary system.

13. The system according to claim 12, wherein the spectrum adjustment information comprises identity information of at least one of the first secondary system, the at least part of the first un-licensed frequency spectrum resource unavailable to the first secondary system and a second un-licensed frequency spectrum resource assigned to the first secondary system.

14. A method for managing utilization of un-licensed frequency spectrum resources for secondary systems, comprising:

assigning a first un-licensed frequency spectrum resource in an availability time period to a first secondary system, the first un-licensed frequency spectrum resource being available for wireless transmission of the first secondary system during the availability time period and under interference constraints;

determining whether one or more other secondary systems require at least part of the assigned first un-licensed frequency spectrum resource;

in response to a determination that the one or more other secondary systems require the at least part of the first un-licensed frequency spectrum resource, reconfiguring operational parameters of the first secondary system to reassign the at least part of the first un-licensed frequency spectrum resource to a second secondary system during the availability time period based on current resource utilization, the operational parameters include available frequency and associated maximum transmit power;

receiving a request for an un-licensed frequency spectrum resource from a third secondary system;

reassigning a second un-licensed frequency spectrum resource occupied by the second secondary system to the third secondary system; and

reassigning the at least part of the first un-licensed frequency spectrum resource to the second secondary system if the at least part of the first un-licensed frequency spectrum resource cannot be reassigned to the third secondary system for causing intolerable interference to other systems,

wherein the steps of assigning and reassigning the first un-licensed frequency spectrum resource are under protection of a primary system which is licensed with the un-licensed frequency spectrum resources.

15. A system, comprising:

a memory; and

processing circuitry configured to access the memory and

determine a first un-licensed frequency spectrum resource assigned to the system in an availability time period, the first un-licensed frequency spectrum resource being available for wireless transmission of the system during the availability time period and under interference constraints;

receive, in response to a determination that a second secondary system requires at least part of the assigned un-licensed frequency spectrum resource, a first spectrum adjustment information during the availability time period that indicates at least part of the first un-licensed frequency spectrum resource is no longer assigned to the system;

change operational parameters of the system based on the first spectrum adjustment information, the operational parameters including available frequency and associated maximum transmit power; and

receive, in response to a determination that a third secondary system requires an un-licensed frequency spectrum resource, a second spectrum adjustment information that reassigns a second un-licensed frequency spectrum resource occupied by the system to the third system and reassign the at least part of the first un-licensed frequency spectrum resource to the system if the at least part of the first un-licensed frequency spectrum resource cannot be reassigned to the third secondary system for causing intolerable interference to other systems,

wherein the system operates on the first un-licensed frequency spectrum resource under protection of a primary system which is licensed with the un-licensed frequency spectrum resources.

16. A method for a system, comprising:

determining a first un-licensed frequency spectrum resource assigned to the system in an availability time period, the first un-licensed frequency spectrum resource being available for wireless transmission of the system during the availability time period and under interference constraints;

receiving, in response to a determination that a second secondary system requires at least part of the assigned un-licensed frequency spectrum resource, a first spectrum adjustment information during the availability time period that indicates at least part of the first un-licensed frequency spectrum resource is no longer assigned to the system;

changing operational parameters of the system based on the spectrum adjustment information, the operational parameters including available frequency and associated maximum transmit power; and

receiving, in response to a determination that a third secondary system requires an un-licensed frequency spectrum resource, a second spectrum adjustment information that reassigns a second un-licensed frequency spectrum resource occupied by the system to the third system, and reassign the at least part of the first un-licensed frequency spectrum resource to the system if the at least part of the first un-licensed frequency spectrum resource cannot be reassigned to the third secondary system for causing intolerable interference to other systems,

wherein the system operates on the first un-licensed frequency spectrum resource under protection of a primary system which is licensed with the un-licensed frequency spectrum resources.

17. A non-transitory computer-readable medium including computer-readable instructions, which when executed by a system for managing utilization of un-licensed frequency spectrum resources for secondary systems, cause the system to:

assign a first un-licensed frequency spectrum resource in an availability time period to a first secondary system, the first un-licensed frequency spectrum resource being available for wireless transmission of the first secondary system during the availability time period and under interference constraints;

determine whether one or more other secondary systems require at least part of the assigned first un-licensed frequency spectrum resource;

in response to a determination that the one or more other secondary systems require the at least part of the first un-licensed frequency spectrum resource, reconfigure operational parameters of the first secondary system to reassign the at least part of the first un-licensed frequency spectrum resource to a second secondary system during the availability time period based on current resource utilization, the operational parameters include available frequency and associated maximum transmit power;

receive a request for an un-licensed frequency spectrum resource from a third secondary system, reassign a second un-licensed frequency spectrum resource occupied by the second secondary system to the third secondary system, and reassign the at least part of the first un-licensed frequency spectrum resource to the second secondary system if the at least part of the first un-licensed frequency spectrum resource cannot be reassigned to the third secondary system for causing intolerable interference to other systems,

wherein the system assigns and reassigns the first un-licensed frequency spectrum resource under protection of a primary system which is licensed with the un-licensed frequency spectrum resources.