MOBILE COMMUNICATION SYSTEM, USER TERMINAL, AND PROCESSOR

• US 20150188685A1
• Filed: 07/23/2013
• Published: 07/02/2015
• Est. Priority Date: 07/27/2012
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Yamazaki, Chiharu
• Granted Patent: US 9,923,689 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0066 Requirements on out-of-channel emissions
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 4/022 with dynamic range variability
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 48/14 using user query or user detection
• CPC Class Codes: H04W 52/383 power control in peer-to-peer links
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

In a mobile communication system, comprising: a user terminal that performs communication with a base station and Device to Device (D2D) communication, the user terminal transmits a sounding reference signal to the base station. When at least a part of a first radio resource assigned to transmission of the sounding reference signal overlaps a second radio resource assigned to the D2D communication, the user terminal stops transmitting the sounding reference signal in the first radio resource.

Claims

1. A mobile communication system, comprising:

a user terminal that performs communication with a base station and Device to Device (D2D) communication, wherein

the user terminal transmits a sounding reference signal to the base station, and

when at least a part of a first radio resource assigned to transmission of the sounding reference signal overlaps a second radio resource assigned to the D2D communication, the user terminal stops transmitting the sounding reference signal in the first radio resource.

2. The mobile communication system according to claim 1, wherein, when a part of the first radio resource overlaps the second radio resource, the user terminal stops transmitting the sounding reference signal only in an overlapping part of the first radio resource.

3. The mobile communication system according to claim 1, wherein the base station assigns at least one of the first radio resource and the second radio resource such that a boundary of the first radio resource coincides, in a frequency direction, with a boundary of the second radio resource.

4. A user terminal that performs communication with a base station and Device to Device (D2D) communication, comprising:

a transmission unit that transmits a sounding reference signal to the base station, wherein

when at least a part of a first radio resource assigned to transmission of the sounding reference signal overlaps a second radio resource assigned to the D2D communication, the transmission unit stops transmitting the sounding reference signal in the first radio resource.

5. A processor provided in the user terminal that performs communication with a base station and Device to Device (D2D) communication, performs:

a process of stopping transmission of a sounding reference signal in a first radio resource assigned to the transmission of the sounding reference signal to the base station when at least a part of the first radio resource overlaps a second radio resource assigned to the D2D communication.