17816485. TIMING ADVANCES FOR RANDOM ACCESS simplified abstract (QUALCOMM Incorporated)

TIMING ADVANCES FOR RANDOM ACCESS

Organization Name

QUALCOMM Incorporated

Inventor(s)

Lianghai Ji of San Diego CA (US)

Jun Ma of San Diego CA (US)

Huilin Xu of Temecula CA (US)

Qiang Wu of San Diego CA (US)

Mohamad Sayed Hassan of Paris (FR)

Liangping Ma of San Diego CA (US)

Mehmet Izzet Gurelli of San Diego CA (US)

Weimin Duan of San Diego CA (US)

Karthik Anantha Swamy of La Jolla CA (US)

TIMING ADVANCES FOR RANDOM ACCESS - A simplified explanation of the abstract

This abstract first appeared for US patent application 17816485 titled 'TIMING ADVANCES FOR RANDOM ACCESS

Simplified Explanation

The present disclosure describes techniques for random access in wireless communications. The method involves determining a first timing advance (TA) for transmitting a random access channel (RACH) preamble. Then, a second TA, different from the first TA, is determined for transmitting the RACH preamble. The RACH preamble is transmitted using the second TA. A random access response (RAR) message is received, which includes a timing advance command (TAC). The method determines whether the RAR is intended for the user equipment (UE) based on the TAC, the first TA, and the second TA. If the RAR is intended for the UE, a physical uplink shared channel (PUSCH) transmission is transmitted based on this determination.

• The method involves determining two different timing advances for transmitting a random access channel (RACH) preamble.
• The RACH preamble is transmitted using the second timing advance.
• A random access response (RAR) message is received, which includes a timing advance command (TAC).
• The RAR is checked to determine if it is intended for the user equipment (UE) based on the TAC, the first timing advance, and the second timing advance.
• If the RAR is intended for the UE, a physical uplink shared channel (PUSCH) transmission is transmitted.

Potential applications of this technology:

• Wireless communication systems
• Cellular networks
• Internet of Things (IoT) devices
• Machine-to-machine communication

Problems solved by this technology:

• Efficient random access in wireless communication systems
• Minimizing interference and collisions during random access procedures
• Improving reliability and performance of random access transmissions

Benefits of this technology:

• Improved efficiency and reliability of random access procedures
• Enhanced performance of wireless communication systems
• Reduced interference and collisions during random access transmissions

Original Abstract Submitted

Certain aspects of the present disclosure provide techniques for random access. A method for wireless communications by a user equipment (UE) includes determining a first timing advance (TA) for transmitting a random access channel (RACH) preamble. The method includes determining a second TA, different than the first TA, for transmitting the RACH preamble. The method includes transmitting the RACH preamble using the second TA. The method includes receiving a random access response (RAR) message including a timing advance command (TAC) and determining whether the RAR is intended for the UE based on the TAC, the first TA, and the second TA. The method includes transmitting a physical uplink shared channel (PUSCH) transmission based on a determination that the RAR is intended for the UE.