Method for physical control format indicator channel mapping
AssigneeLG Electronics Inc.
InventorsJung Hoon Lee, Joon Kui Ahn
Life of this patent
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Abstract
A method of mapping symbols of a physical control format indicator channel (PCFICH) is described. A start position of a resource element to map the symbols for the PCFICH is determined by flooring a value, obtained by multiplying the number of resource blocks by a variable proportional to a symbol index for the PCFICH and then dividing the multiplied result by 2, wherein the resource blocks are transmitted in downlink. The symbols are mapped in the start position. Therefore, a problem of wasting resource elements or not being able to implement mapping can be solved by applying a simple mapping rule while mapping symbols of the PCFICH.
Claims8
A base station in a wireless communication system, the base station comprising:
- means for mapping 16 physical control format indicator channel (PCFICH) symbols to four resource element groups (REGs) in a first orthogonal frequency division multiplexing (OFDM) symbol of a downlink subframe;
- and
- means for transmitting the mapped 16 PCFICH symbols to a user equipment (UE),
- wherein the four REGs comprises a first REG including first four resource elements (REs), a second REG including second four REs, a third REG including third four REs s and a fourth REG including fourth four REs,
- wherein first REs from the first four REs, the second four REs, the third four REs and the fourth four REs have positions given by:
- K0,
- K0+└NRBDL/2┘*NSCRB/2,
- K0+└2NRBDL/2┘*NSCRB/2, and
- K0+└3NRBDL/2┘*NSCRB/2, respectively,
- wherein K0 is determined as (NSCRB/2)*(NIDcell mod 2 NRBDL),
- wherein NRBDL indicates a number of resource blocks (RBs) transmitted in a downlink,
- wherein NSCRB indicates a number of REs per a RB in the frequency domain, and
- wherein NIDcell is a physical layer cell identifier.
A user equipment in a wireless communication system, the user equipment comprising:
- means for receiving 16 physical control format indicator channel (PCFICH) symbols via a first orthogonal frequency division multiplexing (OFDM) symbol of a downlink subframe from a base station, wherein the 16 PCFICH symbols are mapped to four resource element groups (REGs), wherein the four REGs comprises a first REG including first four resource elements (REs), a second REG including second four REs, a third REG including third four REs and a fourth REG including fourth four REs,
- wherein first REs from the first four REs, the second four REs, the third four REs and the fourth four REs have positions given by:
- K0,
- K0+└NRBDL/2┘*NSCRB/2,
- K0+└2NRBDL/2┘*NSCRB/2, and
- K0+└3NRBDL/2┘*NSCRB/2, respectively,
- wherein K0 is determined as (NSCRB/2)*(NIDcell mod 2 NRBDL),
- wherein NRBDL indicates a number of resource blocks (RBs) transmitted in a downlink,
- wherein NSCRB indicates a number of REs per a RB in the frequency domain, and
- wherein NIDcell is a physical layer cell identifier.
Dependencies are inferred from the claim text.