METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL IN A COMMUNICATION SYSTEM

• US 20080123591A1
• Filed: 11/20/2007
• Published: 05/29/2008
• Est. Priority Date: 11/20/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: CHO, Sung-Hyun, JUNG, Young-Ho
• Granted Patent: US 8,059,600 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service

Abstract

An apparatus for transmitting and receiving a signal in a communication system supporting multiple communication service modes is provided. The signal transmission apparatus includes a reference signal generator for generating a reference signal for each of a first communication service mode for covering the entire service area of a cell and at least one second communication service mode for covering a partial area of the first communication service mode. The signal reception apparatus includes a reference signal receiver for receiving, from a Base Station (BS), a reference signal for each of a first communication service mode for covering the entire service area of a corresponding cell and at least one second communication service mode for covering a partial area of the first communication service mode, and a broadcast channel receiver for receiving broadcast channel information from a broadcast channel of the first communication service mode.

Claims

1. An apparatus for transmitting a signal in a communication system supporting multiple communication service modes, the apparatus comprising:

a reference signal generator for generating a reference signal for each of a first communication service mode for covering the entire service area of a cell and at least one second communication service mode for covering a partial area of the first communication service mode.

2. The apparatus of claim 1, further comprising:

a broadcast channel information generator for generating broadcast channel information including information on a combination of a Base Station (BS), from which each user terminal can receive a service in a current position, and a communication service mode, information on a combination of a BS of an adjacent cell and the communication service mode, and silence time interval information; and

a transmitter for transmitting the broadcast channel information over a broadcast channel of the first communication service mode;

wherein the silence time interval information is an interval in which a reference signal of another communication service mode is inserted in a partial interval of a frequency band of a corresponding communication service mode.

3. The apparatus of claim 2, further comprising:

a service mode'"'"'s expected performance estimator for setting a same time interval for each frequency band corresponding to each communication service mode, and making performance comparison between adjacent BSs for each communication service mode communicating in a corresponding frequency in the time interval.

4. The apparatus of claim 1, wherein the reference signal is allocated one sequence for each BS to be reused regardless of the communication service mode, or is allocated multiple sequences for BSs so that different values are used for the corresponding communication service modes.

5. The apparatus of claim 1, wherein the communication service mode is mapped to a particular frequency region.

6. The apparatus of claim 2, wherein the broadcast channel information generator maps each communication service mode to a particular frequency region, and sets the interval to use a partial interval of a first frequency unused by the first communication service mode as a frequency of the second communication service mode.

7. An apparatus for receiving a signal of a Base Station (BS) providing multiple communication service modes in a communication system, the apparatus comprising:

a reference signal receiver for receiving, from the BS, a reference signal for each of a first communication service mode for covering the entire service area of a corresponding cell and at least one second communication service mode for covering a partial area of the first communication service mode; and

a broadcast channel receiver for receiving broadcast channel information from a broadcast channel of the first communication service mode.

8. The apparatus of claim 7, wherein the broadcast channel information includes information on a combination of a BS, from which each user terminal can receive a service in a current position, and a communication service mode, and information on a combination of a BS of an adjacent cell and a communication service mode.

9. The apparatus of claim 7, wherein the reference signal is allocated one sequence for each BS to be reused regardless of the communication service mode, or is allocated multiple sequences for BSs so that different values are used for the corresponding communication service modes.

10. The apparatus of claim 7, wherein the communication service mode is mapped to a particular frequency region.

11. The apparatus of claim 7, further comprising:

a performance estimator, upon entering a network, for acquiring synchronization with an anchor communication service mode of the network, and performing cell search;

a silence time determiner for setting up a connection with a broadcast channel of the first communication service mode, and determining if a current time position is a silence time interval for transmitting the reference signals and the broadcast channel information;

a communication service mode'"'"'s expected performance estimator for estimating expected performance of each service mode using the broadcast channel and the reference signal;

a best ‘

serving BS’

—

‘

communication service mode’

combination determiner for determining a best combination of a ‘

serving BS’ and

a ‘

communication service mode’

using the expected performance of each communication service mode; and

a broadcast channel receiver for receiving a reference signal of a second communication service mode in the silence time interval uniformly set for each frequency band of each communication service mode.

12. The apparatus of claim 11, wherein the best ‘

serving BS’

—

‘

communication service mode’

combination determiner uses, as a reference value, an output value of a function, an input value of which includes at least one of a maximum received Signal-to-Noise Ratio (SNR) for each communication service mode, a requested rate of a user, a requested service type of the user, a moving velocity of the user, and a charge table for each communication service mode of the user.

13. A method for transmitting a signal in a communication system supporting multiple communication service modes, the method comprising:

generating a reference signal for each of a first communication service mode for covering the entire service area of a cell and at least one second communication service mode for covering a partial area of the first communication service mode.

14. The method of claim 13, further comprising:

generating broadcast channel information including information on a combination of a Base Station (BS), from which each user terminal can receive a service in a current position, and a communication service mode, information on a combination of a BS of an adjacent cell and the communication service mode, and information on a silence time interval in which a reference signal of another communication service mode is transmitted for each communication service mode to which a different frequency band is allocated; and

transmitting the broadcast channel information over a broadcast channel of the first communication service mode.

15. The method of claim 14, wherein the silence time interval is uniformly set in a frequency band allocated to each communication service mode so that a terminal can make performance comparison between adjacent BSs that provide corresponding communication service modes.

16. The method of claim 13, wherein the reference signal is allocated one sequence for each BS to be reused regardless of the communication service mode, or is allocated multiple sequences for BSs so that different values are used for the corresponding communication service modes.

17. A method for receiving a signal of a Base Station (BS) providing multiple communication service modes in a communication system, the method comprising:

receiving, from the BS, a reference signal for each of a first communication service mode for covering the entire service area of a corresponding cell and at least one second communication service mode for covering a partial area of the first communication service mode; and

receiving, from a broadcast channel of the first communication service mode, broadcast channel information including information on a combination of a BS, from which each user terminal can receive a service in a current position, and a communication service mode, and information on a combination of a BS of an adjacent cell and a communication service mode.

18. The method of claim 17, wherein the reference signal is allocated one sequence for each BS to be reused regardless of the communication service mode, or is allocated multiple sequences for BSs so that different values are used for the corresponding communication service modes.

19. The method of claim 17, further comprising:

upon entering a network, acquiring synchronization with an anchor communication service mode of the network, and performing cell search;

setting up a connection with a broadcast channel of the first communication service mode, and determining if a current time position is a silence time interval for transmitting the reference signals and the broadcast channel information;

estimating expected performance of each service mode using the broadcast channel and the reference signal; and

determining a best combination of a ‘

serving BS’ and

a ‘

communication service mode’

using the expected performance of each communication service mode.

20. The method of claim 19, wherein determining a best combination of a ‘

serving BS’ and

a ‘

communication service mode’

comprises;

using, as a reference value, an output value of a function, an input value of which includes at least one of a maximum received Signal-to-Noise Ratio (SNR) for each communication service mode, a requested rate of a user, a requested service type of the user, a moving velocity of the user, and a charge table for each communication service mode of the user.

21. The method of claim 19, wherein the silence time interval is an interval in which a reference signal of another communication service mode is received for each communication service mode for which a reference signal transmission time is set differently.

22. The method of claim 19, wherein the silence time interval is set uniformly for each communication service mode to make performance comparison between adjacent BSs that provide corresponding communication service modes.

23. The method of claim 17, wherein the communication service mode is mapped to a particular frequency region.