Random Access Method And Radio Communciation Terminal Device

• US 20070195730A1
• Filed: 02/28/2005
• Published: 08/23/2007
• Est. Priority Date: 03/09/2004
• Status: Active Grant

• Current Assignee: Optis Wireless Technology, LLC (Brevet Capital)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Nishio, Akihiko, Cheng, Jun, Miyoshi, Kenichi
• Granted Patent: US 7,873,000 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

There are disclosed a random access method for establishing an individual channel between a radio communication terminal device and a base station device in a short time and a radio communication terminal device executing the random access method. In this device, in step ST320, a RACH sub-channel allocation unit (211) allocates a transmission packet inputted from a replication unit (202) to an arbitrary sub-carrier at the RACH arbitrary time slot at random. In step ST330, an allocation unit (210) judges whether an overlap is generated in the allocation result obtained by the RACH sub-channel allocation unit (211). When the allocation unit (210) judges that an overlap is generated in the allocation result, the allocation unit (210) causes one of the RACH sub-channel allocation units (211) which has caused the overlap to again perform allocation of step ST320. On the other hand, when judgment is made that no overlap is generated in the allocation result, step ST340 is executed.

Claims

4-1. The random access method according to claim 1, wherein, in said assignment step, each of the plurality of duplicated transmission packets are assigned randomly to one of time slots in the random access channel.

10. A radio communication terminal apparatus comprising:

a duplication section that duplicates a transmission packet;

an assignment section that assigns each of the plurality of duplicated transmission packets to a random access channel; and

a transmission section that transmits the plurality of transmission packets in accordance with an assignment result in said assignment section.