Mobile communication system, user terminal, and processor for assigning radio resources for transmission of sounding reference signals and device to device communication resources

• US 9,923,689 B2
• Filed: 07/23/2013
• Issued: 03/20/2018
• Est. Priority Date: 07/27/2012
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Yamazaki, Chiharu
• Primary Examiner(s): Huynh, Dung B
• Application Number:
  US14/415,280
• Publication Number:
  US 20150188685A1
• Time in Patent Office: 1,701 Days
• 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 radio terminal that;

performs uplink communication with a base station by transmitting a first signal to the base station, the first signal using radio resources having a time dimension and a frequency dimension, the first signal also containing sounding reference signals, and

performs Device to Device (D2D) communication with another radio terminal by transmitting a second signal to the another radio terminal, the second signal also using radio resources having a time dimension and a frequency dimension, wherein a frequency range of the first signal is different from a frequency range of the second signal, wherein

in response to a situation when sounding reference signals in a given subframe of the first signal simultaneously occur in both the frequency range of the first radio signal and the frequency range of the second radio signal, the radio terminal stops transmitting only those sounding reference signals in the given subframe that occur in the frequency range of the second radio signal and continue transmitting those sounding reference signals in the given subframe that occur in the frequency range of the first radio signal.

2. A radio terminal comprising:

a processor and a memory coupled to the processor, the processor configured to;

perform uplink communication with a base station by transmitting a first signal to the base station, the first signal using radio resources having a time dimension and a frequency dimension, the first signal also containing sounding reference signals, and

perform Device to Device (D2D) communication with another radio terminal by transmitting a second signal to the another radio terminal, the second signal also using radio resources having a time dimension and a frequency dimension, wherein a frequency range of the first signal is different from a frequency range of the second signal, wherein

in response to a situation when sounding reference signals in a given subframe of the first signal simultaneously occur in both the frequency range of the first radio signal and the frequency range of the second radio signal, the processor stops transmitting only those sounding reference signals in the given subframe that occur in the frequency range of the second radio signal and continue transmitting those sounding reference signals in the given subframe that occur in the frequency range of the first radio signal.

3. An apparatus to be provided in a radio terminal, comprising:

a processor and a memory coupled to the processor, the processor configured to;

perform uplink communication with a base station by transmitting a first signal to the base station, the first signal using radio resources having a time dimension and a frequency dimension, the first signal also containing sounding reference signals, and

perform Device to Device (D2D) communication with another radio terminal by transmitting a second signal to the another radio terminal, the second signal also using radio resources having a time dimension and a frequency dimension, wherein a frequency range of the first signal is different from a frequency range of the second signal, wherein

in response to a situation when sounding reference signals in a given subframe of the first signal simultaneously occur in both the frequency range of the first radio signal and the frequency range of the second radio signal, the processor stops transmitting only those sounding reference signals in the given subframe that occur in the frequency range of the second radio signal and continue transmitting those sounding reference signals in the given subframe that occur in the frequency range of the first radio signal.