Patent ID: 9226282
Filing Date: 2015-12-29
Classification: H04L,H04W

Abstract:
1. A method implemented in a user equipment (UE) used in a wireless communications network configured to support carrier aggregation, the method comprising: assuming a component carrier (CC) is a normal CC when no higher layer signaling is received indicating that the CC is a host CC or a normal CC; when higher layer signaling is received, receiving, from a base station, higher layer signaling indicating a host CC; receiving a first physical downlink control channel (PDCCH) on the host CC; reading first downlink control information (DCI) in the first PDCCH according to a first predefined format; when higher layer signaling is received, receiving a second PDCCH on the normal CC; and reading second DCI in the second PDCCH according to a second predefined format; and wherein in a normal CC the UE detects PDCCH assuming all DCI formats are with a zero-bit carrier indicator field and in a host CC the UE detects PDCCH assuming all DCI formats include a non-zero carrier indicator field.