Method and apparatus for random access in a system wherein user equipment with different operating bandwidths coexist

A method for proceeding random access in a user equipment, wherein the user equipment is served by a base station, the method comprises:

• receiving preamble configuration information from the base station, the preamble configuration information including the information associated with the respective preamble group;
• selecting the corresponding preamble group according to the received preamble configuration information and the communication bandwidth supported by the user equipment itself, and selecting a preamble from the selected preamble group randomly;
• transmitting the selected preamble to the base station;
• and
• proceeding the further communication with the base station within the communication bandwidth supported by the user equipment.

An apparatus for proceeding random access in a base station, wherein the user equipment is served by the base station, the apparatus comprises:

• a configuring means, for configuring multiple preamble groups and configuring at least one preamble for the respective preamble group according to a predetermined condition;
• a broadcasting means, for broadcasting preamble configuration information to the respective user equipment, the preamble configuration information including the information associated with the respective preamble group;
• a first receiving means, for receiving a preamble from the user equipment;
• a determining means, for determining the communication bandwidth supported by the user equipment according to the received preamble;
• and
• a first communicating means, for proceeding the further communication with the user equipment within the communication bandwidth supported by the user equipment.

An apparatus for proceeding random access in an user equipment, wherein the user equipment is served by a base station, the apparatus comprises:

• a second receiving means, for receiving preamble configuration information from the base station, the preamble configuration information including the information associated with the respective preamble group;
• a selecting means, for selecting the corresponding preamble group according to the received preamble configuration information and the communication bandwidth supported by the user equipment itself, and selecting a preamble from the selected preamble group randomly;
• a transmitting means, for transmitting the selected preamble to the base station;
• and
• a second communicating means, for proceeding the further communication with the base station within the communication bandwidth supported by the user equipment.