BASE STATION DEVICE, MOBILE STATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

• US 20150131636A1
• Filed: 01/23/2015
• Published: 05/14/2015
• Est. Priority Date: 07/26/2012
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: TANAKA, Yoshinori
• Application Number:
  US14/603,891
• Publication Number:
  US 20150131636A1
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A base station device includes a processor configured to: generate a group of mobile station devices based on timings of transmitting signals from a first mobile station device and a second mobile station device; and calculate a timing correction amount of uplink transmission timing based on a reception timing of a signal transmitted from the first mobile station device belonging to the group; and a radio communication circuit configured to transmit the timing correction amount to the first and the second mobile station devices belonging to the group.

Claims

1. A base station device comprising:

a processor configured to;

generate a group of mobile station devices based on timings of transmitting signals from a first mobile station device and a second mobile station device; and

calculate a timing correction amount of uplink transmission timing based on a reception timing of a signal transmitted from the first mobile station device belonging to the group; and

a radio communication circuit configured to transmit the timing correction amount to the first and the second mobile station devices belonging to the group.

2. The base station device according to claim 1, the processor further configured to designate the first mobile station device belonging to the group;

and

the radio communication circuit further configured to transmit an instruction signal that makes the first mobile station device transmit the signal.

3. The base station device according to claim 1, the radio communication circuit further configured to transmit a group identifier identifying the group to the first and second mobile station devices belonging to the group,

wherein a destination of the timing correction amount is designated by the group identifier.

4. The base station device according to claim 1, the radio communication circuit further configured to transmit a mobile station identifier identifying the first mobile station device to the first and second mobile station devices belonging to the group,

wherein a destination of the timing correction amount is designated by the mobile station identifier.

5. The base station device according to claim 2, wherein the processor designates the second mobile station device and switches the first mobile station device to the second mobile station device on a time basis.

6. The base station device according to claim 2, wherein the processor designates one of the mobile station devices transmitted uplink scheduling requests as the first mobile station device.

7. The base station device according to claim 1, the processor further configured to allocate radio resources of a search space allocated uniquely to the group to a control signal accompanying transmission of the timing correction amount.

8. The base station device according to claim 1, wherein the processor generates the group in accordance with a timing correction amount of uplink transmission timing calculated for each mobile station device.

9. A mobile station device of a first mobile station device and a second mobile station device belonging to a group, the mobile station device comprising:

a first radio communication circuit configured to receive a timing correction amount calculated by a base station device based on a reception timing of a signal transmitted from the first mobile station device or the second mobile station device, and received at a base station device; and

a processor configured to control an uplink transmission timing based on the timing correction amount received by the processor.

10. The mobile station device according to claim 9, the first radio communication circuit further configured to receive an instruction signal that makes the mobile station device transmit a monitoring signal to the base station device;

and

the mobile station further comprises a second radio communication circuit configured to repeatedly transmit the monitoring signal in response to the instruction signal when receiving the instruction signal, a reception timing of the monitoring signal being used to calculate the timing correction amount at the base station device.

11. The mobile station device according to claim 9, the first radio communication circuit further configured to receive, from the base station device, a group identifier identifying the group of mobile station devices,

wherein the first radio communication circuit receives the timing correction amount transmitted to a destination designated by the group identifier.

12. The mobile station device according to claim 9, the first radio communication circuit further configured to receive, from the base station device, a mobile station identifier identifying the first mobile station device or the second mobile station device,

wherein the first radio communication circuit receives the timing correction amount transmitted to a destination designated by the mobile station identifier.

13. The mobile station device according to claim 10, wherein the second radio communication circuit repeatedly transmits an uplink reference signal.

14. A communication system, the communication system comprising:

a mobile station device and a base station device,

wherein the base station device includes;

the processor configured to;

generate a group of mobile station devices based on timings of transmitting signals from a first mobile station device and a second mobile station device; and

calculate a timing correction amount of uplink transmission timing based on a reception timing of a monitoring signal transmitted from the first mobile station device belonging to the group; and

a radio communication circuit configured to transmit the timing correction amount to the first and the second mobile station devices belonging to the group.

15. A communication method at a base station device, the method comprising:

generating a group of mobile station devices based on timings of transmitting signals from a first mobile station device and a second mobile station device;

calculating a timing correction amount of uplink transmission timing based on a reception timing of a monitoring signal transmitted from the first mobile station device belonging to the group; and

transmitting the timing correction amount to the first and the second mobile station devices belonging to the group.