Control channel format indicator frequency mapping
AssigneeQUALCOMM Incorporated
InventorsXiaoxia Zhang, Durga Prasad Malladi, Juan Montojo
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Abstract
Systems and methodologies are described that facilitate selecting frequency for transmitting control channel format indicator (CCFI) data such to identify a related cell. In one example, the CCFI data can be transmitted in an initial portion of frequency (such as an orthogonal frequency division multiplexing (OFDM) symbol) in a time transmit interval (TTI). The CCFI data can be spread across the initial portion of frequency and be shifted to identify the transmitting cell. Additionally, the CCFI data can be scrambled to further identify the cell. The CCFI data can also be utilized to determine structure of subsequent control and/or data channels.
Claims45
A method for transmitting control channel format information in wireless communications networks, comprising:
- generating control channel format indicator (CCFI) data that defines a structure of control channels subsequently transmitted over one or more antennas;
- selecting subcarriers of bandwidth over which the CCFI data is spread based at least in part on shifting subcarriers utilized according to a cell identifier;
- and
- transmitting the CCFI data over the selected subcarriers of bandwidth.
A wireless communications apparatus, comprising:
- at least one processor configured to:
- select a portion of bandwidth for spreading control channel format indicator (CCFI) data for one or more antennas based at least in part on a cell identifier;
- and
- transmit the CCFI data over the portion of bandwidth;
- and
- a memory coupled to the at least one processor.
A wireless communincations apparatus that transmits control channel format information in wireless communications networks;
- comprising:
- means for generating control channel format indicator (CCFI) data that defines a structure of subsequently transmitted control channels;
- means for selecting a portion of bandwidth over which the CCFI data is spread based at least in part on reusably shifting over the bandwidth according to a cell identifier;
- and
- means for transmitting the CCFI data over the selected portion of bandwidth.
A computer program product, comprising:
- a computer-readable medium comprising:
- code for causing at least one computer to generate control channel format indicator (CCFI) data that defines a structure of control channels subsequently transmitted over one or more antennas;
- code for causing the at least one computer to select subcarriers of bandwidth over which the CCFI data is spread based at least in part on shifting subcarriers utilized according to a cell identifier, and
- code for causing the at least one computer to transmit the CCFI data over the selected subcarriers of bandwidth.
A method for receiving control channel format information in wireless communications networks, comprising:
- receiving an initial portion of bandwidth in a time transmit interval (TTI) from a transmitting cell;
- detecting frequency location of control channel format indicator (CCFI) data throughout, the portion of bandwidth;
- and
- identifying the transmitting cell based at least in part on the location of CCFI data in the portion of bandwidth.
A wireless communications apparatus, comprising:
- at least one processor configured to:
- detect frequency location of control channel format indicator (CCFI) data in a received signal;
- and
- identify a transmitter of the CCFI data based at least in part on the frequency location;
- and
- a memory coupled to the at least one processor.
A wireless communications apparatus for receiving control channel format information in a wireless communications network, comprising:
- means for determining frequency location of control channel format indicator (CCFI) data throughout a received portion of bandwidth;
- and
- means for identifying a transmitting cell based at least in part on the location of CCFI data in the portion of bandwidth.
A computer program product, comprising:
- a computer-readable medium comprising:
- code for causing at least one computer to receive an initial portion of bandwidth in a time transmit interval (SI) from a transmitting cell;
- code for causing the at least one computer to detect frequency location of control channel format indicator (CCFI) data throughout the portion of bandwidth;
- and
- code for causing the at least one computer to identify the transmitting cell based at least in part on the location of CCFI data in the portion of bandwidth.
Dependencies are inferred from the claim text.