USER TERMINAL, BASE STATION, AND PROCESSOR

• US 20160113038A1
• Filed: 06/10/2014
• Published: 04/21/2016
• Est. Priority Date: 06/10/2013
• Status: Abandoned Application

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: OTANI, Tarou
• Application Number:
  US14/896,807
• Publication Number:
  US 20160113038A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 52/38 TPC being performed in particular situations
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/50 for emergency connections
• CPC Class Codes: H04W 80/10 adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14

Abstract

UE 100-1 is used in a mobile communication system in which a voice call of a packet switching scheme is supported. The UE 100-1 transmits, to eNB 200, a random access signal to perform random access to the eNB 200 based on broadcast information received from the eNB 200. The broadcast information includes an emergency call parameter to be applied to transmission of an emergency call random access signal. When the random access is performed to originate an emergency call, the controller transmits the emergency call random access signal to the eNB 200 by applying the emergency call parameter included in the broadcast information.

Claims

1. A user terminal in a mobile communication system in which a voice call of a packet switching scheme is supported, comprising:

a controller configured to perform a process of transmitting, to a base station, a random access signal based on broadcast information received from the base station, wherein

the broadcast information includes a parameter to be applied to transmission of the random access signal for an emergency call, and

when the emergency call is originated, the controller performs the process of transmitting the random access signal for the emergency call to the base station by applying the parameter included in the broadcast information.

2. The user terminal according to claim 1, wherein

the broadcast information further includes information whether or not the base station supports the random access signal for the emergency call, and

when the emergency call is originated, and the base station supports the random access signal for the emergency call, the controller perform a process of transmitting the random access signal for the emergency call to the base station by applying the parameter included in the broadcast information.

3. The user terminal according to claim 1, wherein

the parameter is a parameter indicating a signal sequence to be applied to the transmission of the random access signal for the emergency call.

4. The user terminal according to claim 3, wherein

the signal sequence is secured separately from a signal sequence to be applied to transmission of the random access signal for a non-emergency call.

5. The user terminal according to claim 1, wherein

the parameter is a parameter indicating transmission power to be applied to the transmission of the random access signal for the emergency call.

6. The user terminal according to claim 5, wherein

the transmission power is set to power higher than transmission power to be applied to transmission of the random access signal for a non-emergency call.

7. A base station in a mobile communication system in which a voice call of a packet switching scheme is supported, comprising:

a transmitter configured to transmit broadcast information including a parameter for an emergency call, to be applied to transmission of an emergency call random access signal; and

a receiver configured to receive the random access signal for the emergency call, to which the parameter is applied, from a user terminal that performs random access to the base station to originate the emergency call.

8. The base station according to claim 7, wherein

the broadcast information further includes information indicating whether or not the base station supports the random access signal for the emergency call.

9. The base station according to claim 7, further comprising

a controller configured to preferentially perform a process for the random access signal for the emergency call when reception of the random access signal for the emergency call conflicts with reception of random access signal for a non-emergency call.

10. The base station according to claim 7, wherein

the parameter is a parameter indicating a signal sequence to be applied to transmission of the random access signal for the emergency call.

11. The base station according to claim 10, wherein

the signal sequence is secured separately from a signal sequence to be applied to transmission of the random access signal for a non-emergency call.

12. The base station according to claim 7, wherein

the parameter is a parameter indicating transmission power to be applied to transmission of the random access signal for the emergency call.

13. The base station according to claim 12, wherein

the transmission power is set to power higher than transmission power to be applied to transmission of the random access signal for a non-emergency call.

14. A processor for controlling a user terminal in a mobile communication system in which a voice call of a packet switching scheme is supported, the processor performing

a process of transmitting, to a base station, a random access signal based on broadcast information received from the base station, wherein

the broadcast information includes a parameter to be applied to transmission of the random access signal for an emergency call, and

when the emergency call is originated, the processor performs the process of transmitting the random access signal for the emergency call to the base station by applying the parameter included in the broadcast information.