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

• US 9,913,256 B2
• Filed: 07/17/2015
• Issued: 03/06/2018
• 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:
  US14/802,405
• Publication Number:
  US 20150327251A1
• Time in Patent Office: 963 Days
• 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 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, by the mobile station device after determining that the random access preamble was transmitted in an uplink synchronous status, receiving a random access response according to the RA-RNTI which identifies the random access response, and transmitting uplink data according to the C-RNTI which notified a resource assignment of the uplink data.

2. The method according to claim 1, further comprising:

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

3. The method according to claim 1, further comprising:

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

4. The method according to claim 1, further comprising:

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

5. The method according to claim 1, wherein the resource assignment of the uplink data is uplink grant of the uplink data.

6. The method according to claim 1, wherein the RA-RNTI and the C-RNTI are indicated by a downlink control channel.

7. A mobile station device, comprising:

a transceiver configured to transmit a random access preamble;

a processor configured to monitor both a Cell Radio Network Temporary Identity (C-RNTI) and a Random Access Radio Network Temporary Identity (RA-RNTI), and

the transceiver further configured to, upon detection of the C-RNTI and the RA-RNTI in a same sub-frame after determining that the random access preamble was transmitted in an uplink synchronous status, receive a random access response according to the RA-RNTI which identifies the random access response, and transmit uplink data according to the C-RNTI which notified a resource assignment of the uplink data.

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

9. The device according to claim 7, wherein the transceiver is further configured to receive, upon detection of the RA-RNTI instead of the C-RNTI, the random access response.

10. The device according to claim 7, wherein the transceiver is further configured to transmit, upon detection of the C-RNTI instead of the RA-RNTI, the uplink data.

11. The device according to claim 7, wherein the resource assignment of the uplink data is uplink grant of the uplink data.

12. The mobile station device according to claim 7, wherein the RA-RNTI and the C-RNTI are indicated by a downlink control channel.

13. An apparatus, comprising:

a circuit configured to transmits a random access preamble;

a circuit configured to monitors both a Cell-Radio Network Temporary Identity (C-RNTI) and a Random Access Radio Network Temporary Identity (RA-RNTI), and

a circuit configured to, upon detection of the C-RNTI and the RA-RNTI in a same sub-frame after determining that the random access preamble was transmitted in an uplink synchronous status, receives the random access response according to the RA-RNTI which identifies a random access response, and transmit uplink data according to the C-RNTI which notified a resource assignment of the uplink data.

14. The apparatus according to claim 13, further comprising a circuit configured to monitors the C-RNIT at an arbitrary timing.

15. The apparatus according to claim 13, further comprising a circuit configured to receives, upon detection of the RA-RNTI instead of the C-RNTI, the random access response.

16. The apparatus according to claim 13, further comprising a circuit configured to transmits, upon detection of the C-RNTI instead of the RA-RNTI, the uplink data.

17. The apparatus according to claim 13, wherein the resource assignment of the uplink data is uplink grant of the uplink data.

18. The mobile station device according to claim 13, wherein the RA-RNTI and the C-RNTI are indicated by a downlink control channel.