Wireless communication system, base station apparatus, mobile station apparatus, and wireless communication method

Patent metadata

Field	Value
Publication number	US-2016100428-A1
Application number	US-201514965622-A
Country	US
Kind code	A1
Filing date	Dec 10, 2015
Priority date	Aug 6, 2009
Publication date	Apr 7, 2016
Grant date	—

Abstract

A mobile station apparatus receives, on a PDCCH (physical downlink control channel), information used for initiating a random access procedure. The mobile station apparatus also transmits a random access preamble on a physical random access channel resource based on or in response to the information. Furthermore, the mobile station apparatus receives a random access response corresponding to the random access preamble on one specific downlink component carrier among a plurality of downlink component carriers where the one specific downlink component carrier linked to an uplink component carrier on which the random access preamble is transmitted on the physical random access channel resource.

First claim

1 . A mobile station apparatus configured to communicate with a base station apparatus using a plurality of component carriers, the mobile station apparatus comprising:
a reception unit configured to receive, on a PDCCH (physical downlink control channel), information used for initiating a random access procedure; a transmission unit configured to transmit a random access preamble on a physical random access channel resource based on or in response to the information; the reception unit configured to receive a random access response corresponding to the random access preamble on one specific downlink component carrier among a plurality of downlink component carriers, wherein the one specific downlink component carrier linked to an uplink component carrier on which the random access preamble is transmitted on the physical random access channel resource.

2 . The mobile station apparatus according to claim 1 , wherein
the information including first information used for selecting the random access preamble.

3 . The mobile station apparatus according to claim 2 , further comprising
a setting unit configured to set second information indicating a set of physical random access channel resources corresponding to the one specific downlink component carrier; a selecting unit configured to: in a case that the first information is equal to zero, select a group of preambles, randomly select one preamble within the group of preambles, and determine the physical random access channel resource within the set of physical random access channel resources.

4 . The mobile station apparatus according to claim 1 , wherein
the information including first information used for selecting the random access preamble and third information used for selecting the physical random access channel resource.

5 . The mobile station apparatus according to claim 4 , further comprising
a setting unit configured to set second information indicating a set of physical random access channel resources corresponding to the one specific downlink component carrier; a selecting unit configured to: in a case that the first information is not equal to zero, select one preamble based on or in response to the first information, and determine the physical random access channel resource within the set of physical random access channel resources based on or in response to the third information.

6 . The mobile station apparatus according to claim 1 , wherein
the random access response including an uplink grant for a transmission of physical uplink shared channel on the uplink component carrier.

7 . The mobile station apparatus according to claim 1 , wherein
the one specific downlink component carrier is indicated by a received signal.

8 . A communication method for use in a mobile station apparatus configured to communicate with a base station apparatus using a plurality of component carriers, the communication method comprising:
receiving, on a PDCCH (physical downlink control channel), information used for initiating a random access procedure; transmitting a random access preamble on a physical random access channel resource based on or in response to the information; receiving a random access response corresponding to the random access preamble on one specific downlink component carrier among a plurality of downlink component carriers, wherein the one specific downlink component carrier linked to an uplink component carrier on which the random access preamble is transmitted on the physical random access channel resource.

9 . The communication method according to claim 8 , wherein
the information including first information used for selecting the random access preamble.

10 . The communication method according to claim 9 , further comprising
setting second information indicating a set of physical random access channel resources corresponding to the one specific downlink component carrier; in a case that the first information is equal to zero, selecting a group of preambles, randomly selecting one preamble within the group of preambles, and determining the physical random access channel resource within the set of physical random access channel resources.

11 . The communication method according to claim 8 , wherein
the information including first information used for selecting the random access preamble and third information used for selecting the physical random access channel resource.

12 . The communication method according to claim 11 , further comprising
setting second information indicating a set of physical random access channel resources corresponding to the one specific downlink component carrier; in a case that the first information is not equal to zero, selecting one preamble based on or in response to the first information, and determining the physical random access channel resource within the set of physical random access channel resources based on or in response to the third information.

13 . The communication method according to claim 8 , wherein
the random access response including an uplink grant for a transmission of physical uplink shared channel on the uplink component carrier.

14 . The communication method according to claim 8 , wherein
the one specific downlink component carrier is indicated by a received signal.

15 . Abase station apparatus configured to communicate with a mobile station apparatus using a plurality of component carriers, the base station apparatus comprising:
a transmission unit configured to transmit, on a PDCCH (physical downlink control channel), information used for initiating a random access procedure; a reception unit configured to receive a random access preamble on a physical random access channel resource based on or in response to the information; the transmission unit configured to transmit a random access response corresponding to the random access preamble on one specific downlink component carrier among a plurality of downlink component carriers, wherein the one specific downlink component carrier linked to an uplink component carrier on which the random access preamble is received on the physical random access channel resource.

16 . The base station apparatus to claim 15 , wherein
the information including first information used for selecting the random access preamble.

17 . The base station apparatus according to claim 15 , wherein
the information including first information used for selecting the random access preamble and third information used for selecting the physical random access channel resource.

Assignees

• Sharp Kk

Inventors

• Suzuki Shoichi
• Kato Yasuyuki
• Yamada Shohei

Classifications

• H04L5/0098

  Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands · CPC title

• H04W74/004 Primary

  in the uplink, i.e. towards network · CPC title

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title

• H04W74/0866

  using a dedicated channel for access · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title