TRANSMISSION CONTROL METHOD, MOBILE STATION, AND RADIO BASE STATION

• US 20090116424A1
• Filed: 11/02/2006
• Published: 05/07/2009
• Est. Priority Date: 11/04/2005
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Nakamura, Takehiro, Abeta, Sadayuki, Ishii, Minami
• Granted Patent: US 8,098,628 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• 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

A packet communication method according to the present invention includes: transmitting, at a mobile station, a random access request that includes mobile station information assigned to the mobile station, to a radio base station through a random access channel allocated to a predetermined radio resource; receiving, at the radio base station, the random access request from the mobile station; and transmitting, at the radio base station, a random access response signal that notifies the receipt of the random access request and includes the mobile station information, to the mobile station through a downlink shared control channel corresponding to the random access channel.

Claims

1. A packet communication method, comprising:

transmitting, at a mobile station, a random access request that includes mobile station information assigned to the mobile station, to a radio base station through a random access channel allocated to a predetermined radio resource;

receiving, at the radio base station, the random access request from the mobile station; and

transmitting, at the radio base station, a random access response signal that notifies the receipt of the random access request and includes the mobile station information, to the mobile station through a downlink shared control channel corresponding to the random access channel.

2. The packet communication method according to claim 1, further comprising,

transmitting, at the mobile station, the random access request to the radio base station through the random access channel, by changing the radio resource used for transmitting the random access channel, when the mobile station fails to receive, from the radio base station, the random access response signal that includes the mobile station information.

3. A mobile station, comprising:

a random access request transmitter unit configured to transmit a random access request that includes mobile station information assigned to the mobile station, to a radio base station through a random access channel defined by a predetermined radio resource; and

a random access response receiver unit configured to receive a random access response that includes the mobile station information.

4. A radio base station, comprising:

a random access receiver unit configured to receive a random access request that includes mobile station information assigned to a mobile station, from the mobile station through a random access channel defined by a predetermined radio resource; and

a random access response transmitter unit configured to transmit a random access response signal that notifies the receipt of the random access request and includes the mobile station information, to the mobile station through a downlink shared channel corresponding to the random access channel.