Communication control method

• US 10,708,815 B2
• Filed: 11/05/2018
• Issued: 07/07/2020
• Est. Priority Date: 05/08/2014
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Fujishiro, Masato, Nagasaka, Yushi
• Primary Examiner(s): Patel, Chandrahas B
• Application Number:
  US16/180,578
• Publication Number:
  US 20190075487A1
• Time in Patent Office: 610 Days
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 36/0069 in case of dual connectivity, e.g. decoupled uplink/downlink
• CPC Class Codes: H04W 36/00698 using different RATs
• CPC Class Codes: H04W 36/02 Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
• CPC Class Codes: H04W 36/023 Buffering or recovering information during reselection
• CPC Class Codes: H04W 36/0235 by transmitting sequence numbers, e.g. SN status transfer
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/1446 wherein at least one of the networks is unlicensed
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 76/16 Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 80/02 Data link layer protocols
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A communication control system, user terminal, and processor for controlling a user terminal in which a user terminal controls communication by using a first data bearer and a second data bearer, where the first data bearer does not pass through a Wireless Local Area Network (WLAN), but passes through the cellular base station, and the second data bearer passes through the WLAN and the cellular base station. The cellular base station controls communication with the user terminal by using the first data bearer and the second data bearer. The user terminal receives information transmitted from the cellular base station, where the information is for the user terminal to transmit a status report indicating a delivery status regarding data received via the WLAN and data directly received from the cellular base station. The user terminal transmits the status report to the cellular base station on a basis of the information.

Claims

1. A communication system, comprising:

a user terminal; and

a cellular base station, wherein

the user terminal controls communication by using a first data bearer and a second data bearer, the first data bearer not passing through a Wireless Local Area Network (WLAN) but passing through the cellular base station and the second data bearer passing through the WLAN and the cellular base station,

the cellular base station controls communication with the user terminal by using the first data bearer and the second data bearer,

the cellular base station transmits information to the user terminal, the information being for the user terminal to transmit a status report indicating a delivery status regarding data received via the WLAN and data directly received from the cellular base station,

the user terminal transmits the status report to the cellular base station on a basis of the information, and

the status report includes information indicating whether or not a Packet Data Convergence Protocol Service Data Unit (PDCP SDU) after the first missing PDCP SDU is already received.

2. A processor for controlling a user terminal, the processor communicatively coupled to a memory and configured to:

control communication by using a first data bearer and a second data bearer, the first data bearer not passing through a Wireless Local Area Network (WLAN) but passing through a cellular base station and the second data bearer passing through the WLAN and the cellular base station;

receive information from the cellular base station, the information being for the user terminal to transmit a status report indicating a delivery status regarding data received via the WLAN and data directly received from the cellular base station; and

transmit the status report to the cellular base station on a basis of the information,

wherein the status report includes information indicating whether or not a Packet Data Convergence Protocol Service Data Unit (PDCP SDU) after the first missing PDCP SDU is already received.

3. A user terminal comprising:

a processor; and

a memory communicatively coupled to the processor, wherein

the processor is configured to;

control communication by using a first data bearer and a second data bearer, the first data bearer not passing through a Wireless Local Area Network (WLAN) but passing through a cellular base station and the second data bearer passing through the WLAN and the cellular base station;

receive information from the cellular base station, the information being for the user terminal to transmit a status report indicating a delivery status regarding data received via the WLAN and data directly received from the cellular base station; and

transmit the status report to the cellular base station on a basis of the information, and

the status report includes information indicating whether or not a Packet Data Convergence Protocol Service Data Unit (PDCP SDU) after the first missing PDCP SDU is already received.