MOBILE SYSTEM AND BASE STATION SYSTEM FOR EFFECTIVELY USING LICENSED SPECTRUM AND SHARED SPECTRUM

• US 20090209265A1
• Filed: 05/07/2008
• Published: 08/20/2009
• Est. Priority Date: 02/18/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jang, Kyung Hun, Hwang, Hyo Sun, Kim, Youngsoo, Hyon, Tae In, Kwon, Tae Soo, Lee, In Sun
• Granted Patent: US 9,357,399 B2
• Time in Patent Office: Days
• US Class Current: 455/454
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A mobile system and a base station system for effectively using a licensed spectrum and a shared spectrum are provided. The mobile system includes: an initialization unit to initialize transmitting and receiving of data using at least one of the licensed spectrum and the shared spectrum; a sensing unit to sense a spectrum for transmitting and receiving of the data via the at least one spectrum; and a transceiver to transmit and receive the data via the sensed spectrum.

Claims

1. A mobile system to support a communication service of a licensed spectrum and a communication service of a shared spectrum, comprising:

an initialization unit to initialize transmitting and receiving of data using at least one of the licensed spectrum and the shared spectrum;

a sensing unit to sense a spectrum for transmitting and receiving of the data via the at least one spectrum; and

a transceiver to transmit and receive the data via the sensed spectrum.

2. The mobile system as claimed in claim 1, wherein the sensing unit comprises:

a sensing information reporting unit to report sensing information to a base station system via the at least one spectrum; and

a shared spectrum changing unit to change the shared spectrum based on a control message that is received from the base station system according to the sensing information.

3. The mobile system as claimed in claim 1, wherein:

the licensed spectrum includes a bandwidth to provide at least one of a voice service and a data service that has a data rate of less than or equal to a threshold, and

the shared spectrum includes a remaining bandwidth after excluding a bandwidth included in the licensed spectrum.

4. The mobile system as claimed in claim 1, further comprising:

a monitoring unit to monitor a control message from a base station system via the licensed spectrum each predetermined period while in a sleep mode; and

a mode converter to convert the sleep mode to an awake mode based on the control message.

5. A base station system comprising:

a mobile system classifying unit to classify a mobile system depending on an available spectrum between a licensed spectrum and a shared spectrum; and

a spectrum allocating unit to allocate at least one of the licensed spectrum and the shared spectrum according to classification of the mobile system.

6. The base station system as claimed in claim 5, wherein the mobile system is classified into a mobile system that can use only the licensed spectrum and a mobile system that can use both the licensed spectrum and the shared spectrum.

7. The base station system as claimed in claim 5, further comprising:

a change message transmitter to transmit a change message associated with a change of the shared spectrum to the mobile system based on sensing information that is received from the mobile system via the least one spectrum.

8. The base station system as claimed in claim 5, further comprising:

a control message transmitter to transmit a control message via the licensed spectrum at a scheduled time in order to convert the mobile system from the sleep mode to the awake mode.

9. A mobile system comprising:

a monitoring unit to monitor a control message from a base station system via a licensed spectrum each predetermined period while in a sleep mode; and

a mode converter to convert the sleep mode to an awake mode based on the control message.

10. The mobile system as claimed in claim 9, wherein the control message is transmitted from the base station system when an allocated shared spectrum is changed.

11. The mobile system as claimed in claim 9, wherein:

the sleep mode includes a power-off mode where a power of a communication module with the base station system is shut off, and

the awake mode includes a power-on mode where the power of the communication module with the base station system is turned on.

12. The mobile system as claimed in claim 9, wherein the predetermined period includes a time that is scheduled in advance with the base station system.

13. A mobile system comprising:

a control message receiver to receive a control message associated with a virtual base station system from a base station system via an allocated spectrum;

a spectrum selector to select a spectrum to be used for communication with the virtual base station system based on the control message; and

a data transceiver to transmit and receive data via the selected spectrum.

14. The mobile system as claimed in claim 13, wherein the control message includes at least one of an identifier of the virtual base station system and spectrum information.

15. The mobile system as claimed in claim 13, wherein the data transceiver comprises:

a synchronization unit to perform forward frame synchronization with the virtual base station system;

an initialization unit to receive a broadcast control message from the virtual base station system to perform initialization between the mobile system and the virtual base station system; and

an additional control message receiver to receive an additional control message via the selected spectrum.

16. The mobile system as claimed in claim 15, wherein the additional control message comprises at least one of control information for operation of the virtual base station system, control information for transmitting and receiving of data, and sensing information for spectrum management.

17. The mobile system as claimed in claim 13, further comprising:

a reporting unit to report sensing information to the virtual base station system,

wherein the sensing information is used to secure a shared spectrum in the virtual base station system.

18. The mobile system as claimed in claim 13, wherein the selected spectrum comprises at least one portion of the shared spectrum that is secured in the virtual base station system via a spectrum broker.

19. A base station system comprising:

a control message transmitter to transmit control information to a mobile system,

wherein the control information includes spectrum information of an associated virtual base station system; and

a communication repeater to relay communication between the mobile system and the virtual base station system, based on the spectrum information.

20. The base station system as claimed in claim 19, wherein:

the control message further includes an identifier of the virtual base station system, and

the mobile system communicates with the virtual base station system corresponding to the identifier, based on the spectrum information.

21. The base station system as claimed in claim 19, wherein the communication repeater comprises:

a data transceiver to transmit and receive data for the virtual base station system via a shared spectrum.