Apparatus and method to prioritize a random access procedure for emergency access
AssigneeBroadcom Corporation
InventorHersh Vardhan SHUKLA
Life of this patent
Estimating the term…
Abstract
A communication device and base station configured to perform random access procedures utilizing, for example, Long-term Evolution (LTE). For example, the random access procedures can be performed for emergency calls. The base station can be configured to allocate one or more preambles to a group of preambles that are designated for emergency calls. The communication device can be configured to transmit random access preambles at a maximum transmission power and ramp down the transmission power for subsequent transmissions. The communication device can be configured to initiate a second random access procedure and determine whether to continue with the second random access procedure or the first random access procedure while aborting the other.
Claims20
A base station, comprising:
- a transceiver configured to communicate with a communication network;
- and
- processor circuitry communicatively coupled to the transceiver, the processor circuitry being configured to:
- identify a plurality of random access (RA) preambles that are to be used to initiate access by mobile devices;
- assign each of the plurality of RA preambles to one of a plurality of groups of RA preambles;
- designate one of the plurality of groups of RA preambles to be used for emergency calls by the mobile devices;
- and
- generate a message and cause the transceiver to transmit the message to the mobile devices, the message identifying the plurality of groups of RA preambles and their corresponding RA preambles in each group.
A communication device, comprising:
- a transceiver configured to communicate with a communication network;
- and
- processor circuitry communicatively coupled to the transceiver, the processor circuitry being configured to:
- determine an upper threshold number of random access (RA) preamble transmission attempts for an RA procedure;
- determine a transmission number of an RA preamble by the communication device;
- determine a power ramping step value;
- determine a transmission power value for transmission of the RA preamble based on the upper threshold number of RA preamble transmission attempts, the transmission number of the RA preamble, and the power ramping step value;
- and
- generate a RA transmission and cause the transceiver to transmit the RA transmission to a base station, the RA transmission having the determined transmission power value.
A communication device, comprising:
- a transceiver configured to communicate with a communication network;
- and
- processor circuitry communicatively coupled to the transceiver, the processor circuitry being configured to:
- initiate a first random access (RA) procedure;
- initiate a second RA procedure;
- determine if an acknowledgment has been received for the first RA procedure;
- and
- abort one of the first and the second RA procedures based on the determination.
Dependencies are inferred from the claim text.