Random access method and device
AssigneeBeijing Xiaomi Mobile Software Co., Ltd.
InventorXiaowei Jiang
Life of this patent
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Abstract
A random access method includes: receiving, by a terminal, a radio resource control (RRC) message sent by a base station, the RRC message comprising a power threshold; detecting, by the terminal, a reference signal received power (RSRP) of a current downlink carrier; determining, by the terminal, a first uplink carrier among a plurality of uplink carriers corresponding to the base station according to the RSRP and the power threshold; and transmitting, by the terminal, a random access preamble to the base station using the first uplink carrier. The plurality of uplink carriers comprise a supplementary uplink (SUL) carrier and a non-SUL carrier.
Claims18
A random access method, comprising:
- receiving, by a terminal, a carrier identifier of a first uplink carrier sent by a base station;
- determining, by the terminal, the first uplink carrier among a plurality of uplink carriers corresponding to the base station according to the carrier identifier of the first uplink carrier;
- and
- transmitting, by the terminal, a random access preamble to the base station using the first uplink carrier;
- wherein the plurality of uplink carriers comprise a supplementary uplink (SUL) carrier and a non-SUL carrier, and wherein receiving the carrier identifier of the first uplink carrier sent by the base station comprises:
- receiving, by the terminal, handover command information, the handover command information comprising the carrier identifier of the first uplink carrier.
A random access method, comprising:
- transmitting, by a base station, a carrier identifier of a first uplink carrier;
- and
- receiving, by the base station, a random access preamble sent by a terminal using the first uplink carrier determined by the terminal among a plurality of uplink carriers corresponding to the base station according to the carrier identifier of the first uplink carrier;
- wherein the plurality of uplink carriers comprise a supplementary uplink (SUL) carrier and a non-SUL carrier, and the base station is a target base station, and transmitting the carrier identifier of the first uplink carrier comprises:
- receiving a handover request from an original base station;
- generating handover request response information comprising the carrier identifier of the first uplink carrier;
- and
- transmitting the handover request response information comprising the carrier identifier of the first uplink carrier to the original base station.
A terminal device, comprising:
- a processor;
- and
- a memory configured to store instructions executable by the processor;
- wherein the processor is configured to:
- receive a carrier identifier of a first uplink carrier sent by a base station;
- determine the first uplink carrier among a plurality of uplink carriers corresponding to the base station according to the carrier identifier of the first uplink carrier, the plurality of uplink carriers comprising a supplementary uplink (SUL) carrier and a non-SUL carrier;
- transmit a random access preamble to the base station using the first uplink carrier;
- and
- receive handover command information, the handover command information comprising the carrier identifier of the first uplink carrier.
Dependencies are inferred from the claim text.