Apparatus and method for communication in cognitive radio network

• US 8,326,336 B2
• Filed: 08/18/2010
• Issued: 12/04/2012
• Est. Priority Date: 08/18/2009
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Um, Jung-Sun, Song, Myung-Sun, Kim, Chang-Joo, Ko, Gwangzeen, Hwang, Sung-Hyun, Kim, Sang-Won, Park, Changhyun
• Primary Examiner(s): Gesesse, Tilahun B
• Application Number:
  US12/858,841
• Publication Number:
  US 20110045862A1
• Time in Patent Office: 839 Days
• Field of Search: 455/450, 455/41.1, 455/67.11, 455/62, 455/226.1, 455/41.2
• US Class Current: 455/513
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A CR apparatus for performing communication in a CR network includes: a communication unit configured to measure a channel estimation signal, transmit measured channel state information to a master device, and, when a QP of a reference channel arrives, make a communication channel transition to a candidate channel and perform communication; and a channel information management unit configured to receive and manage the channel state information measured by the communication unit and channel information comprising a candidate channel, into which a channel transition is to be made during a QP of the reference channel, received from the master device and control channel transition of the communication unit based on the channel information.

Claims

1. A Cognitive Radio (CR) apparatus for performing communication in a CR network, comprising:

a communication unit configured to measure a channel estimation signal, transmit measured channel state information to a master device, and, when a Quiet Period (QP) of a reference channel arrives, make a communication channel transition to a candidate channel and perform communication through the candidate channel; and

a channel information management unit configured to receive and manage the channel state information measured by the communication unit and channel information comprising the candidate channel, into which a channel transition is to be made during the QP of the reference channel, received from the master device and control channel transition of the communication unit based on the channel information,

wherein channel state of the candidate channel is measured by using a channel estimation signal transmitted through the candidate channel during the QP,

wherein the candidate channel is selected to the communication channel transition for the QP based on the channel state of the candidate channel.

2. The CR apparatus of claim 1, wherein the channel information comprises at least one of channel estimation information, channel group management information, network information, and broadcasting information.

3. The CR apparatus of claim 2, wherein the channel estimation information comprises information for SINR measurement of the candidate channel.

4. The CR apparatus of claim 3, wherein the communication unit is configured to receive channel information and perform normal data communication during communication through the candidate channel.

5. The CR apparatus of claim 1, wherein the channel information management unit is configured to control the communication unit so as to make a channel transition from the candidate channel to the reference channel when the QP is over.

6. A master apparatus for performing communication in a Cognitive Radio (CR) network, comprising:

a channel signal estimation unit configured to generate a channel estimation signal for estimation of a channel in the CR network;

a communication unit configured to transmit the signal generated by the channel signal estimation unit and perform communication through a reference channel and a candidate channel;

a channel information management unit configured to manage channel information regarding the reference channel and candidate channels, into which a channel transition is to be made in a Quiet Period (QP) of the reference channel, based on channel state information received from CR devices; and

a channel allocation unit configured to allocate the reference channel or at least one of the candidate channels based on the channel information and control the communication unit,

wherein channel state of the candidate channels is measured by using a channel estimation signal transmitted through the candidate channels during the QP in the CR devices,

wherein the candidate channels is selected to the channel transition for the QP based on the channel state of the candidate channel in the CR devices.

7. The master apparatus of claim 6, wherein the channel information comprises at least one of channel estimation information, channel group management information, network information, and broadcasting information.

8. The master apparatus of claim 7, wherein the channel estimation information comprises information for SINR measurement of the candidate channel.

9. The master apparatus of claim 6, wherein the channel allocation unit is configured to set priority of candidate channel use for each CR device when allocating the candidate channel.

10. The master apparatus of claim 6, wherein the channel information management unit is configured to, when selecting the candidate channel, determine priority by considering channel transition time necessary for channel transition between the reference channel and the candidate channel.

11. A method for communication by a Cognitive Radio (CR) device in a CR network, comprising:

making a channel transition from a reference channel to a candidate channel, when a starting point of a Quiet Period (QP) of the reference channel arrives during communication through the reference channel, in the QP;

measuring a channel estimation signal transmitted through the candidate channel during the QP, and reporting measured channel state information to a master device; and

receiving channel information comprising the candidate channel, into which a channel transition is to be made in the QP of the reference channel, through the candidate channel into which a transition has been made,

wherein channel state of the candidate channel is measured by using the channel estimation signal,

wherein the candidate channel is selected to the channel transition for the QP based on the channel state of the candidate channel.

12. The method of claim 11, wherein the channel information comprises at least one of channel estimation information, channel group management information, network information, and broadcasting information.

13. The method of claim 12, wherein the channel estimation information comprises information for SINR measurement of the candidate channel.

14. The method of claim 13, wherein the information for SINR measurement is used to select a candidate channel for the communication channel transition.

15. The method of claim 11, further comprising:

making a transition from the candidate channel to the reference channel when the QP is over.

16. A method for communication by a master device in a Cognitive Radio (CR) network, comprising:

allocating a reference channel and a candidate channel to a CR device based on channel information;

making a transition to the predetermined candidate channel based on the channel information when a starting point of a Quiet Period (QP) arrives in the reference channel;

generating a channel estimation signal in the candidate channel and transmitting the channel estimation signal; and

receiving channel state information from the CR devices, generating channel information regarding the reference channel and candidate channels, into which a channel transition is to be made in the QP of the reference channel, based on the channel state information, and transmitting the channel information,

wherein channel state of the candidate channels is measured by using the channel estimation signal transmitted through the candidate channels during the QP in the CR devices,

wherein the candidate channels is selected to the channel transition for the QP based on the channel state of the candidate channel in the CR devices.

17. The method of claim 16, wherein the channel information comprises at least one of channel estimation information, channel group management information, network information, and broadcasting information.

18. The method of claim 17, wherein the channel estimation information comprises information for SINR measurement of the candidate channel.

19. The method of claim 16, wherein information regarding candidate channels of the channel information is allocated by setting priority of the candidate channels.

20. The method of claim 16, further comprising:

performing data communication through the candidate channel.