# US 2019/0357094 A1 · Base station and communication method

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- Number: US 2019/0357094 A1
- Document ID: US20190357094A1
- Status: Published application
- Kind: A1
- Application number: 16/527,532
- Filed: 2019-07-31
- Published: 2019-11-21
- Earliest claimed: 2017-02-16
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Hidenori MATSUO
- Web page: https://patentgrep.com/patent/US20190357094A1

## CPC

- H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports}
- H04W 16/08: Load shedding arrangements
- H04W 16/32: Hierarchical cell structures
- H04W 24/02: Arrangements for optimising operational condition
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 28/0268: {using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24)}
- H04W 36/0033: {with transfer of context information}
- H04W 36/00837: {Determination of triggering parameters for hand-off}
- H04W 36/08: Reselecting an access point
- H04W 36/04: Reselecting a cell layer in multi-layered cells
- H04W 36/304: {due to measured or perceived resources with higher communication quality}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A base station relates to a wireless communication system that performs handover from a cell connected with a terminal to a neighbor cell of the cell. The base station includes: circuitry, which, in operation, sets an offset to be applied to reception quality of the neighbor cell according to a quality of service (QoS) class identifier (QCI) of the terminal when the terminal determines whether to report a measurement result to be used in determination on the handover; and a transmitter, which, in operation, transmits the offset to the terminal.

## Claims

### Claim 1

A base station in a wireless communication system that performs handover from a cell connected with a terminal to a neighbor cell of the cell, the base station comprising:
circuitry, which, in operation, sets an offset to be applied to reception quality of the neighbor cell according to a quality of service (QoS) class identifier (QCI) of the terminal when the terminal determines whether to report a measurement result to be used in determination on the handover; and
a transmitter, which, in operation, transmits the offset to the terminal.

### Claim 2 (depends on 1)

The base station according to claim 1, wherein, with an allowable delay time corresponding to the QCI of the terminal being longer, the circuitry sets the offset higher.

### Claim 3 (depends on 1)

The base station according to claim 1, wherein, with an allowable packet loss corresponding to the QCI being larger, the circuitry sets the offset higher.

### Claim 4 (depends on 1)

The base station according to claim 1, wherein, when radio link failure occurs in the terminal after the terminal is handed over from the cell of the base station to the neighbor cell, the circuitry reduces the offset for the terminal.

### Claim 5 (depends on 1)

The base station according to claim 1, wherein the transmitter transmits information on setting of the offset to another base station of the neighbor cell.

### Claim 6 (depends on 1)

The base station according to claim 1, further comprising a receiver, which, in operation, receives information on setting of the offset in the neighbor cell from another base station of the neighbor cell, wherein
the circuitry sets the offset for determination on the handover from the cell of the base station to the neighbor cell based on the information.

### Claim 7 (depends on 1)

The base station according to claim 1, wherein, when the offset for the terminal is set higher than a reference value, the circuitry retains information on the terminal for a certain period of time without deleting the information, when the terminal is handed over to the neighbor cell.

### Claim 8

A communication method in a wireless communication system that performs handover from a cell connected with a terminal to a neighbor cell of the cell, the communication method comprising:
setting an offset to be applied to reception quality of the neighbor cell according to a quality of service (QoS) class identifier (QCI) of the terminal when the terminal determines whether to report a measurement result to be used in determination on the handover; and
transmitting the offset to the terminal.