USRE45103EActiveUtility

Method for receiving control information in orthogonal frequency division multiplexing system of mobile communication system

Assignee: LG ELECTRONICS INCPriority: Jun 21, 2007Filed: Jul 12, 2013Granted: Sep 2, 2014

Est. expiryJun 21, 2027(~0.9 yrs left)· nominal 20-yr term from priority

Inventors:Joon Kui Ahn Young Woo Yun Ki Jun Kim Eun Sun Kim Dae Won Lee Dong Youn Seo Suk Hyon Yoon

H04J 11/0036H04L 5/0094H04L 5/0007H04L 27/2601H04L 5/0053H04L 1/1812H04L 27/2602H04L 5/0055

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Cited by

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References

Claims

Abstract

The present invention relates to receiving control information in an orthogonal frequency division multiplexing (OFDM) system of a mobile communication system. The present invention includes receiving information related to a number of OFDM symbols in a subframe for receiving first control information, receiving information related to a number of OFDM symbols in the subframe for receiving second control information, decoding the first control information according to the received information related to the number of OFDM symbols in the subframe for receiving the first control information, and decoding the second control information according to the received information related to the number of OFDM symbols in the subframe for receiving the second control information, wherein the number of OFDM symbols for receiving the first control information is less than or equal to the number of OFDM symbols for receiving the second control information.

Claims

exact text as granted — not AI-modified

What is claimed is: 
     
       1. A method of transmitting downlink channels at a base station of an orthogonal frequency division multiplexing (OFDM) system, the method comprising:
 transmitting first information indicating a size m of a first region through a broadcast channel, wherein the first region is defined by m OFDM symbol(s) starting from a beginning of a subframe and the first region is used for first channels that carry hybrid automatic repeat request (HARQ) ACK/NACKs;   transmitting second information indicating a size n of a second region through a physical control format indicator channel (PCFICH), wherein the second region is defined by n OFDM symbol(s) starting from the beginning of the subframe and the second region is used for second channels that carry downlink control information; and   transmitting the HARQ ACK/NACKs and the downlink control information through the first channels and second channels, respectively,   wherein first resources for the first channels are identified from the first information, and second resources for the second channels are identified from remaining resources excluding the first resources within the second region, and   wherein the second channels are physical downlink control channels (PDCCHs).   
     
     
       2. The method of  claim 1 , wherein the size n is configured to be equal to or greater than the size m such that n≧m. 
     
     
       3. A method of receiving downlink channels at a mobile terminal of an orthogonal frequency division multiplexing (OFDM) system, the method comprising:
 receiving first information indicating a size m of a first region through a broadcast channel, wherein the first region is defined by m OFDM symbol(s) starting from a beginning of a subframe and the first region is used for first channels that carry hybrid automatic repeat request (HARQ) ACK/NACKs;   receiving second information indicating a size n of a second region through a physical control format indicator channel (PCFICH), wherein the second region is defined by n OFDM symbol(s) starting from the beginning of the subframe and the second region is used for second channels that carry downlink control information; and   receiving the HARQ ACK/NACKs and the downlink control information through the first channels and second channels, respectively,   wherein first resources for the first channels are identified from the first information, and second resources for the second channels are identified from remaining resources excluding the first resources within the second region, and   wherein the second channels are physical downlink control channels (PDCCHs).   
     
     
       4. The method of  claim 3 , wherein the size n is configured to be equal to or greater than the size m such that n≧m. 
     
     
       5. The method of  claim 3 , further comprising:
 performing operations in accordance with one of the second channels received through the second region that is designated to the mobile terminal.   
     
     
       6. A base station used in an orthogonal frequency division multiplexing (OFDM) system, the base station comprising:
 a radio frequency unit; and   a processor,   wherein the processor is configured to:   transmit first information indicating a size m of a first region through a broadcast channel, wherein the first region is defined by m OFDM symbol(s) starting from beginning of a subframe and the first region is used for first channels that carry hybrid automatic repeat request (HARQ) ACK/NACKs;   transmit second information indicating a size n of a second region through a physical control format indicator channel (PCFICH), wherein the second region is defined by n OFDM symbol(s) starting from the beginning of the subframe and the second region is used for second channels that carry downlink control information; and   transmit the HARQ ACK/NACKs and the downlink control information through the first channels and second channels, respectively,   wherein first resources for the first channels are identified from the first information, and second resources for the second channels are identified from remaining resources excluding the first resources within the second region, and   wherein the second channels are physical downlink control channels (PDCCHs).   
     
     
       7. The base station of  claim 6 , wherein the size n is configured to be equal to or greater than the size m such that n≧m. 
     
     
       8. A mobile terminal used in an orthogonal frequency division multiplexing (OFDM) system, the mobile terminal comprising:
 a radio frequency unit; and   a processor,   wherein the processor is configured to: receive first information indicating a size m of a first region through a broadcast channel, wherein the first region is defined by m OFDM symbol(s) starting from a beginning of a subframe and the first region is used for first channels that carry hybrid automatic repeat request (HARQ) ACK/NACKs;   receive second information indicating a size n of a second region through a physical control format indicator channel (PCFICH), wherein the second region is defined by n OFDM symbol(s) starting from the beginning of the subframe and the second region is used for second channels that carry downlink control information; and   receive the HARQ ACK/NACKs and the downlink control information through the first channels and second channels, respectively,   wherein first resources for the first channels are identified from the first information, and second resources for the second channels are identified from remaining resources excluding the first resources within the second region, and   wherein the second channels are physical downlink control channels (PDCCHs).   
     
     
       9. The mobile terminal of  claim 8 , wherein the size n is configured to be equal to or greater than the size m such as n≧m. 
     
     
       10. The mobile terminal of  claim 8 , wherein the processor is further configured to:
 perform operations in accordance with one of the second channels received through the second region that is designated to the mobile terminal.   
     
     
       11. A method of receiving downlink signals at a mobile terminal in an orthogonal frequency division multiplexing (OFDM) system, the method comprising:
 receiving information related to a number m of OFDM symbols, wherein the m OFDM symbols from a beginning of a subframe are used for reception of one or more channels that carry acknowledgement/negative acknowledgement (ACK/NACK) information; and   receiving information related to a number n of OFDM symbols, wherein the n OFDM symbols from the beginning of the subframe are used for reception of one or more channels that carry scheduling information,   wherein:   each of n and m is an integer that is equal to or greater than 1;   n is equal to or greater than m; and   a transmission interval of the information related to m is greater than a transmission interval of the information related to n.   
     
     
       12. The method of claim 11, wherein:
 the information related to m is received via a channel for broadcast; and   the information related to n is received via a channel that carries an indicator related to a control channel format.   
     
     
       13. The method of claim 11, wherein:
 the information related to m is received via a radio resource control (RRC) signal; and   the information related to n is received via a first OFDM symbol of every subframe.   
     
     
       14. A method of transmitting downlink signals at a base station in an orthogonal frequency division multiplexing (OFDM) system, the method comprising:
 transmitting information related to a number m of OFDM symbols, wherein the m OFDM symbols from a beginning of a subframe are used for transmission of one or more channels that carry acknowledgement/negative acknowledgement (ACK/NACK) information; and   transmitting information related to a number n of OFDM symbols, wherein the n OFDM symbols from the beginning of the subframe are used for transmission of one or more channels that carry scheduling information,   wherein:   each of n and m is an integer that is equal to or greater than 1;   n is equal to or greater than m; and   a transmission interval of the information related to m is greater than a transmission interval of the information related to n.   
     
     
       15. The method of claim 14, wherein:
 the information related to m is transmitted via a channel for broadcast; and   the information related to n is transmitted via a channel that carries an indicator related to a control channel format.   
     
     
       16. The method of claim 14, wherein:
 the information related to m is transmitted via a radio resource control (RRC) signal; and   the information related to n is transmitted via a first OFDM symbol of every subframe.   
     
     
       17. A mobile station used in an orthogonal frequency division multiplexing (OFDM) system, the mobile station comprising:
 a radio frequency unit; and   a processor configured to cause the radio frequency unit to:   receive information related to a number m of OFDM symbols, wherein the m OFDM symbols from a beginning of a subframe are used for reception of one or more channels that carry acknowledgement/negative acknowledgement (ACK/NACK) information; and   receive information related to a number n of OFDM symbols, wherein the n OFDM symbols from the beginning of the subframe are used for reception of one or more channels that carry scheduling information,   wherein:   each of n and m is an integer that is equal to or greater than 1;   n is equal to or greater than m; and   a transmission interval of the information related to m is greater than a transmission interval of the information related to n.   
     
     
       18. The mobile station of claim 17, wherein:
 the information related to m is received via a channel for broadcast; and   the information related to n is received via a channel that carries an indicator related to a control channel format.   
     
     
       19. The mobile station of claim 17, wherein:
 the information related to m is received via a radio resource control (RRC) signal; and   the information related to n is received via a first OFDM symbol of every subframe.   
     
     
       20. A base station used in an orthogonal frequency division multiplexing (OFDM) system, the base station comprising:
 a radio frequency unit; and   a processor configured to cause the radio frequency unit to:   transmit information related to a number m of OFDM symbols, wherein the m OFDM symbols from a beginning of a subframe are used for transmission of one or more channels that carry acknowledgement/negative acknowledgement (ACK/NACK) information; and   transmit information related to a number n of OFDM symbols, wherein the n OFDM symbols from the beginning of the subframe are used for transmission of one or more channels that carry scheduling information,   wherein:   each of n and m is an integer that is equal to or greater than 1;   n is equal to or greater than m; and   a transmission interval of the information related to m is greater than a transmission interval of the information related to n.   
     
     
       21. The base station of claim 20, wherein:
 the information related to m is transmitted via a channel for broadcast; and   the information related to n is transmitted via a channel that carries an indicator related to a control channel format.   
     
     
       22. The base station of claim 20, wherein:
 the information related to m is transmitted via a radio resource control (RRC) signal; and   the information related to n is transmitted via a first OFDM symbol of every subframe.

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