Conditional uplink timing alignment in a mobile station device of a radio communication system

• US 9,094,909 B2
• Filed: 06/25/2014
• Issued: 07/28/2015
• Est. Priority Date: 08/08/2007
• Status: Active Grant

• Current Assignee: Ueran Technology LLC
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Yamada, Shohei, Kato, Yasuyuki
• Primary Examiner(s): Mered, Habte
• Application Number:
  US14/315,090
• Publication Number:
  US 20140307677A1
• Time in Patent Office: 398 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04W 56/0005 synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 56/005 compensating for timing error by adjustment in the receiver
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/008 with additional processing of random access related information at receiving side
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A mobile station device transmits a random access preamble to a base station device. The base station device receives the random access preamble from the mobile station device and transmits, to the mobile station device, a Random Access-Radio Network Temporary Identity (RA-RNTI) which notifies a resource assignment of a random access response. The mobile station device further monitors downlink control channels while detecting both a Cell-Radio Network Temporary Identity (C-RNTI) and the RA-RNTI, in which a downlink control channel includes the RA-RNTI and a downlink control channel includes the C-RNTI which notifies a resource assignment of downlink data. Upon detection of the C-RNTI and the RA-RNTI in a same sub-frame, the mobile station receives both the random access response and the downlink data, or receives either the random access response or the downlink data.

Claims

1. A radio communication system including:

a base station device that receives a random access preamble and transmits a random access response in response to the random access preamble,

a mobile station device that transmits the random access preamble to the base station device, monitors both a Cell-Radio Network Temporary Identity (C-RNTI) and a Random Access-Radio Network Temporary Identity (RA-RNTI), and receives, upon detection of the C-RNTI and the RA-RNTI in a same sub-frame, both the random access response and the downlink data, wherein the RA-RNTI is carried by a first downlink control channel and identifies the random access response, and wherein the C-RNTI is carried by a second downlink control channel and notifies a resource assignment of downlink data.

4. The system according to claim 1, wherein the mobile station device is further configured to monitor the C-RNIT at an arbitrary timing.

5. The system according to claim 1, wherein the mobile station device is further configured to receive, upon detection of the RA-RNTI instead of the C-RNTI, the random access response.

6. The system according to claim 1, wherein the mobile station device is further configured to receive, upon detection of the C-RNTI instead of the RA-RNTI, the downlink data.

2. A mobile station apparatus, comprising:

a transmitter to transmit a random access preamble;

a receiver to monitor both a Cell-Radio Network Temporary Identity (C-RNTI) and a Random Access-Radio Network Temporary Identity (RA-RNTI), and to receive, upon detection of the C-RNTI and the RA-RNTI in a same sub-frame, both a random access response transmitted by the base station device in response to the random access preamble and downlink data;

wherein the RA-RNTI is carried by a first downlink control channel and identifies the random access response, the C-RNTI is carried by a second downlink control channel and notifies a resource assignment of downlink data.

7. The mobile station device according to claim 2, wherein the mobile station device is further configured to monitor the C-RNIT at an arbitrary timing.

8. The mobile station device according to claim 2, wherein the mobile station device is further configured to receive, upon detection of the RA-RNTI instead of the C-RNTI, the random access response.

9. The mobile station device according to claim 2, wherein the mobile station device is further configured to receive, upon detection of the C-RNTI instead of the RA-RNTI, the downlink data.

3. A method comprising:

transmitting, by a mobile station device, a random access preamble to a base station device;

monitoring, by the mobile station device, both a Cell-Radio Network Temporary Identity (C-RNTI) and a Random Access-Radio Network Temporary Identity (RA-RNTI); and

upon detection of the C-RNTI and the RA-RNTI in a same sub-frame, receiving, by the mobile station device, both a random access response transmitted by the base station device in response to the random access preamble and downlink data;

wherein the RA-RNTI is carried by a first downlink control channel and identifies the random access response, the C-RNTI is carried by a second downlink control channel and notifies a resource assignment of downlink data.

10. The method according to claim 3, further comprising:

monitoring, by the mobile station device, the C-RNIT at an arbitrary timing.

11. The method according to claim 3, further comprising:

receiving, by the mobile station device, the random access response upon detection of the RA-RNTI instead of the C-RNTI.

12. The method according to claim 3, further comprising:

receiving, by the mobile station device, the downlink data upon detection of the C-RNTI instead of the RA-RNTI.