Uplink carrier selection for prach transmission between a nr dedicated carrier and a lte/nr shared carrier
AssigneeNEC Corporation
InventorCaroline LIANG
Life of this patent
Estimating the term…
Abstract
A cellular communication system is disclosed in which user equipment (UE) initiates a random access channel (RACH) procedure by sending one or more messages, comprising a random access preamble, to a 5G base station, using one or more uplink carriers of a plurality of such carriers available for use by the UE. The base station selects an uplink carrier for initial access by the UE and informs the UE, as part of the RACH procedure, of the UL carrier selected by the base station.
Claims5
A method performed by a communication device configured with at least one uplink carrier, the method comprising:
- receiving, from a communication apparatus, an uplink (UL) carrier indicator-indicating which of a non supplementary UL carrier or a supplementary UL carrier to use for a physical random access channel transmission;
- using the UL carrier indicator to determine one UL carrier for the physical random access channel transmission;
- and
- sending, to the communication apparatus, at least one first message (Msg1) in a random access channel, using the one UL carrier indicated by the UL carrier indicator.
A method performed by a communication apparatus, the method comprising:
- sending, to a communication device configured with at least one uplink (UL) carrier, a UL, carrier indicator indicating which of a non supplementary UL carrier or a supplementary UL carrier to use for a physical random access channel transmission;
- and
- receiving at least one first message (Msg1) in a random access channel, using one UL carrier indicated by the UL carrier indicator.
A communication device configured with at least one uplink carrier, the communication device comprising:
- a transceiver circuit;
- and
- a controller, wherein the controller is configured to:
- control the transceiver circuit to receive, from a communication apparatus, an uplink (UL) carrier indicator indicating which of a non supplementary UL carrier or a supplementary UL carrier to use for a physical random access channel transmission,
- use the UL carrier indicator to determine one UL carrier for the physical random access channel transmission, and
- control the transceiver circuit to send, to the communication apparatus, at least one first message (Msg1) in the random access channel, using the one UL carrier indicated by the UL carrier indicator.
A communication apparatus comprising:
- a transceiver circuit;
- and
- a controller, wherein the controller is configured to:
- control the transceiver circuit to send, to a communication device configured with at least one uplink (UL) carrier, a UL carrier indicator indicating which of a non supplementary UL carrier or a supplementary UL carrier to use for a physical random access channel transmission, and
- control the transceiver circuit to receive at least one first message (Msg1) in a random access channel, using one UL carrier indicated by the UL carrier indicator.
Dependencies are inferred from the claim text.