Wireless communications system, base station, terminal, and process method

• US 10,595,194 B2
• Filed: 05/28/2019
• Issued: 03/17/2020
• Est. Priority Date: 03/28/2014
• Status: Active Grant

• Current Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Original Assignee: Fujitsu Connected Technologies Limited
• Inventors: Jitsukawa, Daisuke, Kawasaki, Yoshihiro, Suda, Kenji
• Primary Examiner(s): Phillips, Hassan A
• Assistant Examiner(s): Jones, Prenell P
• Application Number:
  US16/423,917
• Publication Number:
  US 20190281445A1
• Time in Patent Office: 294 Days
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04W 52/0212 managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless communications system includes: a base station configured to switch a first state of storing to a predetermined region of control information transmitted to a terminal, a value instructing a transmission power of the terminal, and a second state of storing to the predetermined region of the control information, a value instructing number of repetitions of transmission of a same data by the terminal; and the terminal configured to switch a third state of controlling the transmission power based on the value stored to the control information received from the base station in the first state, and a fourth state of controlling the number of repetitions of transmission of the same data with a maximum transmission power by the terminal, based on the value stored to the control information received from the base station in the second state.

Claims

1. A wireless communications system comprising:

a base station configured to switch a first state of storing to a predetermined region of control information transmitted to a terminal, a value instructing a transmission power of the terminal, and a second state of storing to the predetermined region of the control information, a value instructing number of repetitions of transmission of a same data by the terminal; and

the terminal configured to switch a third state of controlling the transmission power based on the value stored to the control information received from the base station in the first state, and a fourth state of controlling the number of repetitions of transmission of the same data with a maximum transmission power by the terminal, based on the value stored to the control information received from the base station in the second state.

2. The wireless communications system according to claim 1, wherein

the terminal refrains from controlling the transmission power when in the fourth state.

3. The wireless communications system according to claim 1, wherein

the control information is information indicating a radio resource assigned by the base station to a transmission of a wireless signal from the terminal to the base station.

4. The wireless communications system according to claim 1, wherein

the number of repetitions of transmission of the same data is a transmission time interval (TTI) bundle size in TTI bundling.

5. A base station comprising:

a transmitting circuit configured to transmit control information to a terminal; and

a control circuit configured to switch a first state of storing to a predetermined region of the control information transmitted by the transmitting circuit, a value instructing a transmission power of the terminal, and a second state of storing to the predetermined region of the control information, a value instructing number of repetitions of transmission of a same data with a maximum transmission power by the terminal.

6. A terminal comprising:

a receiving circuit configured to receive control information from a base station configured to switch a first state of storing to a predetermined region of the control information transmitted to the terminal, a value instructing a transmission power of the terminal, and a second state of storing to the predetermined region of the control information, a value instructing number of repetitions of transmission of a same data by the terminal; and

a control circuit configured to switch a third state of controlling the transmission power based on the value stored to the control information received from the base station in the first state by the receiving circuit, and a fourth state of controlling the number of repetitions of transmission of the same data with a maximum transmission power by the terminal, based on the value stored to the control information received from the base station in the second state by the receiving circuit.

7. A process method at a base station, the method comprising:

transmitting control information to a terminal; and

switching a first state of storing to a predetermined region of the transmitted control information, a value instructing a transmission power of the terminal, and a second state of storing to the predetermined region of the control information, a value instructing number of repetitions of transmission of a same data with a maximum transmission power by the terminal.

8. A process method at a terminal, the method comprising:

receiving control information from a base station configured to switch a first state of storing to a predetermined region of the control information transmitted to the terminal, a value instructing a transmission power of the terminal, and a second state of storing to the predetermined region of the control information, a value instructing number of repetitions of transmission of a same data by the terminal; and

switching a third state of controlling the transmission power based on the value stored to the control information received from the base station in the first state, and a fourth state of controlling the number of repetitions of transmission of the same data with a maximum transmission power by the terminal, based on the value stored to the control information received from the base station in the second state.