Methods for carrier aggregation

摘要

Methods to manage multiple component carriers (CCs) efficiently in a mobile network with carrier aggregation (CA) enabled are proposed. For CC activation/deactivation, a single LCID value is used to represent both activation and deactivation command. A single command with multiple instructions is provided to activate and/or deactivate multiple CCs. In addition, unnecessary re-activation or re-inactivation of a CC is prevented, and explicit feedback for activation/deactivation is considered. For scheduling mechanism, a novel buffer status reporting (BSR) procedure is provided, where only one BSR is calculated after preparing all the transport blocks (TB) within one transmission time interval (TTI). Novel power headroom reporting (PHR) format and trigger are also provided. For DL-UL linking, various linking types are created based on whether there is carrier indicator field (CIF) in DL grant or UL grant. The various linking types are used in different applications to improve scheduling flexibility and load balancing.

主权项

1. A method comprising:
receiving an activation or deactivation command for one or more component carriers (CCs) by a user equipment (UE) in a wireless communication network, wherein the one or more CCs are initialized; determining a current state of each CC in the activation or deactivation command; and deriving a plurality of instructions corresponds to the one or more CCs based on the command, wherein the UE activates a CC if and only if the current state of the CC is deactivated and a corresponding instruction is for activation, wherein the UE deactivates the CC if and only if the current state of the CC is activated and a corresponding instruction is for deactivation, and wherein the UE does not change the current state of the CC otherwise.