Patent ID: 9131490
Filing Date: 2015-09-08
Classification: H04L,H04W

Abstract:
1. A transmission method for mapping physical downlink control channel information for a receiving apparatus to control channel elements (CCEs) of a control channel region of a sub-frame of a 3GPP-based based communication system using OFDM in the downlink, the method comprising the following steps performed by a transmitting apparatus: configuring a plurality of CCEs in an extended-physical downlink control channel (extended-PDCCH) region defined in a physical downlink shared channel (PDSCH) region within a sub-frame for signaling downlink control information to the receiving apparatus, the sub-frame comprising a plurality of physical resource block pairs, wherein several sub-control channel elements (sub-CCEs) having different sizes are combined to form CCEs of equal size in both of a localized mapping scheme where each CCE consists of a plurality of sub-CCEs belonging to a single resource block pair and a distributed mapping scheme where each CCE consists of a plurality of sub-CCEs belonging to the plurality of physical resource block pairs, each size being a number of resource elements (REs) excluding REs for transmitting reference signals; mapping the downlink control information to at least one of the plurality of CCEs configured in the extended-PDCCH region; and transmitting the mapped downlink control information.