Kyocera Corporation

Kyocera Wireless Corporation

Other

Qualcomm Incorporated

Henry S Chang

Masato Fujishiro

Amit Kalhan

Noriyoshi Fukuta

Yushi Nagasaka

Kugo Morita

Hiroyuki Adachi

Chiharu Yamazaki

Doug Dunn

Fangwei Tong

Douglas L Dunn

David Comstock

Gregory Poilasne

Hiroyuki Urabayashi

Jorge Fabrega-Sanchez

Susumu Kashiwase

Mayumi Komura

Katsuhiro Mitsui

Erik Stauber

Ramon A Khalona

Peter J Black

Way-Shing Lee

Akinori Iwabuchi

Timothy Thome

Randeep Singh

Naohisa Matsumoto

Takahiro Saiwai

Tim Forrester

Arnold Burger

Ammar Kitabi

Richard J Camarillo

Huan-Sheng Hwang

Ralph B James

Kuo-Tong Chen

Srivatsan Veeraraghavan

A handover control method for performing a conditional handover of a user equipment from a source cell to a target cell, the source cell to which the user equipment connects. The handover control method comprises transmitting, by a source base station which manages the source cell to the user equipment, a RRC message including a list of candidate cells which are candidates for the target cell and a handover condition specified for each of the candidate cells in the list; and starting, by the source base station, transfer of a copy of downlink data of the user equipment to a candidate base station which manages the candidate cell in the list before the user equipment performs the handover.

Handover control method, and user apparatus

A communication control method according to an embodiment is a method used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to a user equipment. The communication control method includes transmitting, by the base station to the user equipment, switching information for switching a delivery mode between a first mode in which an MBS configuration is provided through dedicated signaling and a second mode in which the MBS configuration is provided through broadcast signaling; and performing, by the user equipment having received the switching information, mode switching between the first mode and the second mode based on the switching information.

Communication control method and user equipment

A peer user equipment (UE) device maintains an existing Sidelink Radio Bearer (SLRB) configuration to support a first PC5 Radio Resource Control (RRC) sidelink (SL) communication link with a source UE device. The peer UE device receives a request to establish a second PC5 RRC SL communication link with the source UE device and determines that the existing SLRB configuration is required to support the second PC5 RRC SL communication link. The peer UE device releases the first PC5 RRC SL communication link.

PC5 radio resource control (RRC) sidelink (SL) connection management

A device-specific synchronization signal (DS-SS) is transmitted by a base station within a data channel transmission prior to a page timing window (PTW) of designated for at least one mobile device. The DS-SS includes a plurality of sequence instances where each sequence instance is based on a single root sequence. Prior to entering a sleep state, the mobile device receives transmission information indicative of the DS-SS transmission including at least one of a timing and format of the DS-SS transmission. After a sleep state, a mobile device acquires the DS-SS.

Scheduled device-specific synchronization signals

A communication control method is used in a user equipment in a cell operated in an unlicensed band. The communication control method comprises performing, by the user equipment, Listen Before Talk (LBT) before preforming transmission in the cell; determining, by the user equipment, whether the number of the LBT failure reaches a threshold; and when determining that the number of the LBT failure reaches the threshold, performing, by the user equipment, transmission in another cell in which the number of the LBT failure does not reach the threshold.

Communication control method

A first user equipment (UE) device manages the cast type for transmissions to other UE devices within a group during handovers. At least two cast types can be used from a set of cast types that comprises groupcast and unicast although other cast types may be included.

Cast type transmission management during handovers for sidelink communication

A base station assigns a first set of device-to-device (D2D) communication resources to a first D2D group and assigns a second set of D2D communication resources to a second D2D group. The D2D communication resources of the first set are different from the D2D communication resources of the second set. The first set of D2D communication resources and the second set of D2D communication resources are subsets of reserved D2D communication resources which are a subset of defined uplink communication resources defined by a communication specification for uplink communication between the D2D UE devices and a base station where the reserved D2D communication resources not used for uplink transmission to the base station.

Management of device-to-device communication resources

A user equipment comprising a receiver configured to receive a radio resource control (RRC) Release message from a serving cell, wherein the RRC Release message includes an indication causing the user equipment to transition from an RRC connected state to a specific state, the specific state being a state in which a RRC connection is suspended for the user equipment, and a controller. The controller is configured to cause the user equipment to transition from the RRC connected state to the specific state in response to receiving the RRC Release message, perform a cell reselection operation when the user equipment is in the specific state, and perform, when the user equipment in the specific state, an operation of causing the user equipment to transition from the specific state to an RRC idle state in response to reselecting a predetermined cell.

Base station and radio terminal for performing radio access network paging

A mobile wireless communication user equipment device (mobile device) simultaneously stores logs for two minimization drive tests (MDTs) where a first MDT is associated with a first radio access technology (RAT) and a second MDT is associated with a second RAT. The mobile device logs MDT data for both MDTs to generate two MDT logs. In response to a request, the mobile device transmits a requested MDT log where the MDT log may be transmitted to a base station of a RAT different from the RAT of the MDT log.

Minimization drive test for wireless devices with multiple radio access technologies (RATs)

The examples set forth herein describe methods, devices, and systems in which a wireless communication device that is a node of a vehicle ad-hoc network (VANET) spreads a reservation channel message with a spreading code, according to a codedivision multiple access (CDMA) scheme. The wireless communication device transmits a reservation channel transmission to at least one other wireless communication device, which is another node of the VANET, via time-frequency resources selected from a reservation channel resource pool. The reservation channel transmission contains the spread reservation channel message. In some examples, multiple reservation channel messages may be included in a single reservation channel transmission. In these examples, each reservation channel message is spread with a different orthogonal code before combining the reservation channel messages and spreading the combined reservation channel messages with a spreading code, according to a CDMA scheme.

CDMA based reservation channel transmission in V2V communications

A communication control method according to an embodiment is a method in a mobile communication system in which a data transfer path via at least one of relay apparatuses is configured between a donor base station and a user equipment. In the communication method, a relay apparatus is configured to activate a timer when establishment of a radio connection with an upper apparatus or activation of a relay function of the relay apparatus is rejected by the upper apparatus, or when the radio connection is released by the upper apparatus. The upper apparatus is another relay apparatus under the donor base station or the donor base station. The timer is configured to define time during which establishment of a radio connection with the upper apparatus or notification indicating an intention of activating the relay function to the upper apparatus needs to be avoided.

Relay apparatus in a mobile communication system

A communication control method according to an embodiment is a method for controlling specific data transmission in which a user equipment transmits or receives data of a predetermined size or smaller size during a random access procedure. The communication control method includes transmitting, by the user equipment in an RRC connected state, to a base station, assistance information for the base station to determine whether to perform, on the user equipment, data transmission configuration necessary for performing the specific data transmission, and in response to determining, based on the assistance information, to perform the data transmission configuration on the user equipment, transmitting, by the base station, to the user equipment, an RRC release message including configuration information indicating the data transmission configuration.

A communication control method executed in a relay apparatus including a base station function processor for connecting wirelessly to a lower apparatus, and a user equipment function processor for connecting wirelessly to an upper apparatus, the relay apparatus relaying upstream data from the lower apparatus to the upper apparatus includes transmitting, to the upper apparatus, a first buffer state report indicating an amount of untransmitted upstream data of the relay apparatus, and transmitting, to the upper apparatus, a second buffer state report indicating at least an amount of untransmitted upstream data of the lower apparatus. A trigger condition for transmitting the second buffer state report is different from a trigger condition for transmitting the first buffer state report.

Communication control method and relay apparatus

An origination device transmits a 'received data signal' to a signal forwarding device. The “received data signal” comprises a first set of data. The origination device also transmits at least one “received control signal” to the signal forwarding device and to a destination device. The at least one “received control signal” comprises a first set of control information and a second set of control information. The first and second sets of control information are both associated with the first set of data. The first set of control information contains instructions pertaining to the signal forwarding device processing the first set of data. The second set of control information contains instructions pertaining to the destination device processing the first set of data. The signal forwarding device transmits a “forwarded signal” to the destination device. The “forwarded signal” contains forwarded data, based on the first set of data.

System and method for dual-control signaling for the relay scenarios

A device-specific synchronization signal (DS-SS) is transmitted by a base station within a data channel transmission to a mobile device before a paging time window for the mobile device. After a sleep state, the mobile device attempts to acquire the DS-SS without decoding a downlink control channel to obtain signal transmission information related to transmission of the page message from a base station. In addition to providing timing information for resynchronization, the DS-SS indicates the existence of a page message for the mobile device within the data channel. The mobile device returns to the sleep state in response to not detecting a DS-SS that indicates a page message. Prior to entering a sleep state, the mobile device receives transmission format information indicative of a transmission format of the DS-SS.

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San Diego, CA, United States of America

Henry S Chang