RADIO COMMUNICATION METHOD, RADIO COMMUNICATION SYSTEM AND RADIO BASE STATION

摘要

To appropriately allocate radio resources to downlink control information, in the enhanced downlink control channel, a radio communication method in which a radio base station transmits downlink control information to each user terminal via an enhanced downlink control channel frequency division multiplexed with a downlink shared data channel is provided. The method includes generating the downlink control information in eCCE unit, the eCCE being made up with a plurality of eREGs, and mapping the downlink control information in eREG unit to a plurality of resource regions for the enhanced downlink control channel. Each eREG is made up with a plurality of REs, and the radio base station performs mapping to each of the resource regions in such a manner that the enhanced resource element groups (eREGs) are uniform in number of resource elements. The REs that make up 1 eREG are distributed to a plurality of OFDM symbols.

主权项

1. A radio communication method in a radio communication system in which a radio base station transmits downlink control information to each user terminal via an enhanced downlink control channel that is frequency division multiplexed with a downlink shared data channel, the radio communication method comprising the steps of:
by the radio base station, generating the downlink control information in units of enhanced control channel elements (eCCEs), each of enhanced control channel elements being made up with a plurality of enhanced resource element groups (eREGs); and mapping the downlink control information in units of enhanced resource element groups (eREGs) to a plurality of resource regions for the enhanced downlink control channel, and wherein each of the enhanced resource element groups (eREGs) is made up with a plurality of resource elements (REs), and the radio base station performs mapping to each of the resource regions in such a manner that the enhanced resource element groups (eREGs) are uniform in number of resource elements (REs) and the resource elements (REs) that make up one enhanced resource element group (1 eREG) are distributed to a plurality of OFDM symbols.