US Patent No. 10,973,049

METHOD FOR EXECUTION OF RANDOM ACCESS, USER EQUIPMENT, AND BASE STATION


Patent No. 10,973,049
Issue Date April 06, 2021
Title Method For Execution Of Random Access, User Equipment, And Base Station
Inventorship Fangying Xiao, Pudong Shanghai (CN)
Shohei Yamada, Sakai (JP)
Ningjuan Chang, Pudong Shanghai (CN)
Renmao Liu, Pudong Shanghai (CN)
Assignee SHARP KABUSHIKI KAISHA, Sakai (JP) FG Innovation Company Limited, New Ter...

Claim of US Patent No. 10,973,049

1. A User Equipment (UE) comprising:receiving circuitry configured to receive a broadcast system information block (SIB) containing a configuration used for random access, the configuration indicating an uplink non-anchor carrier;
transmitting circuitry configured to transmit a preamble on the uplink non-anchor carrier on the basis of the configuration; and
processing circuitry configured to determine, on the basis of whether the configuration is a first configuration or a second configuration, whether to use a downlink anchor carrier in order to receive a random access response (RAR), the first configuration indicating a downlink non-anchor carrier that is associated with the uplink non-anchor carrier and is used for random access, and the second configuration not indicating a downlink non-anchor carrier that is associated with the uplink non-anchor carrier and is used for random access,
wherein:
the receiving circuitry is further configured to receive the RAR, such that
if it is determined that the configuration is the first configuration, the RAR is received on the downlink non-anchor carrier,
otherwise, the RAR is received on the downlink anchor carrier,
the downlink non-anchor carrier is a carrier where the UE does not acquire a primary synchronization signal for Narrowband-Internet of Things (NB-IoT), a secondary synchronization signal for the NB-IoT, a physical broadcast channel for the NB-IoT, and a system information block for the NB-IoT, and
the downlink anchor carrier is a carrier where the UE acquires the primary synchronization signal for the NB-IoT, the secondary synchronization signal for the NB-IoT, the physical broadcast channel for the NB-IoT, and the system information block for the NB-IoT.