# US 10,375,532 B2 · Radio terminal and network apparatus

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- Number: US 10,375,532 B2
- Document ID: US10375532B2
- Status: Granted
- Kind: B2
- Application number: 16/039,830
- Filed: 2018-07-19
- Published: 2018-12-06
- Granted: 2019-08-06
- Earliest claimed: 2016-01-21
- Assignees: KYOCERA Corporation
- Applicants: Kyocera Corporation
- Inventors: Masato Fujishiro
- Web page: https://patentgrep.com/patent/US10375532B2

## CPC

- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W 52/02: Power saving arrangements
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A radio terminal according to an embodiment includes a controller configured to perform a discontinuous reception (DRX) operation for multimedia broadcast multicast service (MBMS) transmission. The controller performs the DRX operation by using an MBMS reception opportunity based on hyper system frame number (H-SFN).

## Claims

### Claim 1

A radio terminal comprising:
a receiver configured to receive multimedia broadcast multicast service (MBMS) service via single cell point-to-multipoint (SC-PTM) transmission from a cell that broadcasts hyper system frame number (H-SFN) for extended discontinuous reception (eDRX) operation, the cell being managed by a base station, and
a controller configured to perform the eDRX operation for the SC-PTM transmission,
wherein the controller is configured to perform the eDRX operation by using a single cell multicast control channel (SC-MCCH) reception opportunity and a single cell multicast traffic channel (SC-MTCH) reception opportunity based on the H-SFN,
the controller is configured to determine a first specific H-SFN including the SC-MCCH reception opportunity by using a first value received from the cell,
the controller is configured to determine a second specific H-SFN including the SC-MTCH reception opportunity by using a second value received from the cell,
the second value is associated with the MBMS service received by the radio terminal.

### Claim 2 (depends on 1)

The radio terminal according to claim 1, wherein
the controller is configured to continue a state in which a physical downlink control channel (PDCCH) is monitored within a specific H-SFN period including the SC-MTCH reception opportunity.

### Claim 3

A communication method comprising:
receiving by a radio terminal, multimedia broadcast multicast service (MBMS) service via single cell point-to-multipoint (SC-PTM) transmission from a cell that broadcast hyper system frame number (H-SFN) for extended discontinuous reception (eDRX) operation, the cell being managed by a base station;
performing by the radio terminal, the eDRX operation for the SC-PTM transmission, by using a single cell multicast control channel (SC-MCCH) reception opportunity and a single cell multicast traffic channel (SC-MTCH) reception opportunity based on the H-SFN;
determining by the radio terminal, a first specific H-SFN including the SC-MCCH reception opportunity by using a first value received from the cell; and
determining by the radio terminal, a second specific H-SFN including the SC-MTCH reception opportunity by using a second value received from the cell,
wherein the second value is associated with the MBMS service received by the radio terminal.