Resource element group mapping for a downlink control channel

A method for wireless communication, comprising:

• receiving a downlink control channel resource block (RB) set that includes a plurality of control channel elements (CCEs) in one or more orthogonal frequency-division multiplexing (OFDM) symbols;
• de-mapping the plurality of CCEs from the downlink control channel RB set based at least in part on a mapping function that comprises a first floor function of a number of the plurality of REGs to be included in each OFDM symbol of the one or more OFDM symbols divided by a number of REGs to be included in each CCE of the plurality of CCEs, wherein the mapping function further comprises a second floor function of a CCE index divided by a result of the first floor function, and wherein each CCE is assigned to a corresponding unique set of resource element groups (REGs) in the downlink control channel RB set by the mapping function independent of a number of OFDM symbols on which the downlink control channel RB set is received and wherein each of the one or more OFDM symbols is configured with a plurality of REGs;
• and
• decoding the plurality of CCEs into control information.

An apparatus for wireless communication, comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify control information for transmission on a downlink control channel resource block (RB) set that is configured with one or more orthogonal frequency-division multiplexing (OFDM) symbols;
• encode the control information into a plurality of control channel elements (CCEs);
• map each CCE of the plurality of CCEs to a corresponding unique set of resource element groups (REGs) in the downlink control channel RB set using a mapping function such that the set of REGs is unique regardless of a number of OFDM symbols on which the downlink control channel RB set is configured, wherein each of the one or more OFDM symbols is configured with a plurality of REGs, wherein the mapping function comprises a first floor function of a number of the plurality of REGs to be included in each OFDM symbol of the one or more OFDM symbols divided by a number of REGs to be included in each CCE of the plurality of CCEs, and wherein the mapping function further comprises a second floor function of a CCE index divided by a result of the first floor function;
• and
• transmit the encoded control information using the downlink control channel RB set.

An apparatus for wireless communication, comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a downlink control channel resource block (RB) set that includes a plurality of control channel elements (CCEs) in one or more orthogonal frequency-division multiplexing (OFDM) symbols;
• de-map the plurality of CCEs from the downlink control channel RB set based at least in part on a mapping function that comprises a first floor function of a number of the plurality of REGs to be included in each OFDM symbol of the one or more OFDM symbols divided by a number of REGs to be included in each CCE of the plurality of CCEs, wherein the mapping function further comprises a second floor function of a CCE index divided by a result of the first floor function, and wherein each CCE is assigned to a corresponding unique set of resource element groups (REGs) in the downlink control channel RB set by the mapping function independent of a number of OFDM symbols on which the downlink control channel RB set is received and wherein each of the one or more OFDM symbols is configured with a plurality of REGs;
• and
• decode the plurality of CCEs into control information.