US 11,147,114 B2Granted

Method of handling dual connectivity and related communication device

AssigneeHTC Corporation

InventorChih-Hsiang Wu

Life of this patent

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Abstract

A first base station (BS) connects to a communication device via a first cell, and transmits a Secondary Node (SN) Addition Request message to a second BS, to configure the second BS as a SN for the communication device in a dual connectivity (DC); the second BS transmits a SN Addition Request Acknowledge message comprising a first radio resource control (RRC) message to the first BS, wherein the first RRC message configures a second cell and comprises a first random access channel (RACH) configuration, the first RACH configuration configures at least one first RACH resource, and the first RRC message configures a first association configuration associating the at least one first RACH resource with a first synchronization signal block or a first channel state information reference signal transmitted via the second cell; the second BS communicating with the communication device via the second cell according to the first RRC message.

Claims13

Dependent claims

A network comprising a first base station (BS) and a second BS for handling a dual connectivity (DC), comprising:

at least one storage device;
and
at least one processing circuit, coupled to the at least one storage device, wherein the at least one storage device stores, and the at least one processing circuit is configured to execute instructions of:
the first BS connecting to a communication device via a first cell belonging to the first BS, and configuring a signaling radio bearer (SRB) to the communication device via the first cell;
the first BS transmitting a Secondary Node (SN) Addition Request message to the second BS, to configure the second BS as a SN for the communication device in the DC;
the second BS transmitting a SN Addition Request Acknowledge message comprising a first radio resource control (RRC) message to the first BS in response to the SN Addition Request message, wherein the first RRC message comprises a configuration for a second cell belonging to the second BS and comprises a first random access channel (RACH) configuration for the communication device to perform a random access (RA) to the second cell, the first RACH configuration configures at least one first RACH resource, and the first RRC message configures a first association configuration associating the at least one first RACH resource with a first synchronization signal block (SSB) or a first channel state information reference signal (CSI-RS) transmitted via the second cell;
the first BS transmitting a second RRC message comprising the first RRC message to the communication device on the SRB via the first cell;
the first BS receiving a RRC response message for responding to the second RRC message from the communication device on the SRB via the first cell or a third cell of the first BS;
the second BS receiving a RA preamble from the communication device via the second cell according to the at least one first RACH resource;
the second BS transmitting a RA response (RAR) on a first transmit (Tx) beam to the communication device in response to the RA preamble, wherein the RAR comprises a preamble identifier associated with the RA preamble, wherein the first Tx beam is associated with the first SSB or the first CSI-RS, or is associated with a receive (Rx) beam for receiving the first RA preamble;
the second BS communicating with the communication device via the second cell according to the first RRC message;
and
the second BS transmitting or broadcasting the first SSB or the first CSI-RS to the communication device via the second cell.

10 more elements

A communication device for handling a dual connectivity (DC), comprising:

at least one storage device;
and
at least one processing circuit, coupled to the at least one storage device, wherein the at least one storage device stores, and the at least one processing circuit is configured to execute instructions of:
connecting to a first base station (BS) and having a signaling radio bearer (SRB) with the first BS;
receiving a second radio resource control (RRC) message comprising a first RRC message from the first BS on the SRB via a first cell or a third cell of the first BS, wherein the first RRC message is generated by a second BS, comprises a configuration for a second cell belonging to the second BS, and comprises a first random access channel (RACH) configuration for the communication device to perform a random access (RA) to the second cell, the first RACH configuration configures at least one first RACH resource and the first RRC message configures a first association configuration associating the at least one first RACH resource with a first synchronization signal block (SSB) or a first channel state information reference signal (CSI-RS) transmitted via the second cell;
transmitting a RRC response message for responding to the second RRC message to the first BS on the SRB;
receiving the first SSB or the first CSI-RS via the second cell from the second BS;
transmitting a first RA preamble to the second BS via the second cell according to the at least one first RACH resource, wherein the first RA preamble or the at least one first RACH resource is associated with the first SSB or the first CSI-RS;
receiving a RA response (RAR) from a transmit (Tx) beam of the second BS in response to the first RA preamble, wherein the RAR comprises a preamble identifier associated with the first RA preamble, and the Tx beam is associated with the first SSB or the first CSI-RS or is associated with a receive (Rx) beam for receiving the first RA preamble;
and
communicating with the second BS via the second cell according to the first RRC message and communicating with the first BS.

8 more elements

A method for handling a dual connectivity (DC) by a communication device, comprising:

connecting to a first base station (BS) and having a signaling radio bearer (SRB) with the first BS;
receiving a second radio resource control (RRC) message comprising a first RRC message from the first BS on the SRB via a first cell or a third cell of the first BS, wherein the first RRC message is generated by a second BS, comprises a configuration for a second cell belonging to the second BS, and comprises a first random access channel (RACH) configuration for the communication device to perform a random access (RA) to the second cell, the first RACH configuration configures at least one first RACH resource and the first RRC message configures a first association configuration associating the at least one first RACH resource with a first synchronization signal block (SSB) or a first channel state information reference signal (CSI-RS) transmitted via the second cell;
transmitting a RRC response message for responding to the second RRC message to the first BS on the SRB;
receiving the first SSB or the first CSI-RS via the second cell from the second BS;
transmitting a first RA preamble to the second BS via the second cell according to the at least one first RACH resource, wherein the first RA preamble or the at least one first RACH resource is associated with the first SSB or the first CSI-RS;
receiving a RA response (RAR) from a transmit (Tx) beam of the second BS in response to the first RA preamble, wherein the RAR comprises a preamble identifier associated with the first RA preamble, and the Tx beam is associated with the first SSB or the first CSI-RS or is associated with a receive (Rx) beam for receiving the first RA preamble;
and
communicating with the second BS via the second cell according to the first RRC message and communicating with the first BS.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/048,325Filed 29 Jul 2018 · us provisional application
Priority: 1 Aug 2017
Published: US 2019/0045565 A17 Feb 2019
Granted: 12 Oct 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04W 76/15
Connection setup: setup of multiple wireless link connections
H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver
H04W 56/001
Synchronisation arrangements: synchronization between nodes
H04W 74/0833
Non-scheduled access, e.g. ALOHA: random access procedures, e.g. with 4-step access