View source for 18244439. RANDOM ACCESS CHANNEL (RACH) RESPONSE (RAR) RECEPTION IN AN UNLICENSED RADIO FREQUENCY (RF) SPECTRUM BAND simplified abstract (QUALCOMM Incorporated)

=RANDOM ACCESS CHANNEL (RACH) RESPONSE (RAR) RECEPTION IN AN UNLICENSED RADIO FREQUENCY (RF) SPECTRUM BAND=


==Organization Name==

[[:Category:QUALCOMM Incorporated|QUALCOMM Incorporated]]


[[Category:QUALCOMM Incorporated]]

==Inventor(s)==

[[:Category:Ozcan Ozturk of San Diego CA (US)|Ozcan Ozturk of San Diego CA (US)]][[Category:Ozcan Ozturk of San Diego CA (US)]]

[[:Category:Xiaoxia Zhang of San Diego CA (US)|Xiaoxia Zhang of San Diego CA (US)]][[Category:Xiaoxia Zhang of San Diego CA (US)]]

[[:Category:Tao Luo of San Diego CA (US)|Tao Luo of San Diego CA (US)]][[Category:Tao Luo of San Diego CA (US)]]

[[:Category:Jing Sun of San Diego CA (US)|Jing Sun of San Diego CA (US)]][[Category:Jing Sun of San Diego CA (US)]]

==RANDOM ACCESS CHANNEL (RACH) RESPONSE (RAR) RECEPTION IN AN UNLICENSED RADIO FREQUENCY (RF) SPECTRUM BAND - A simplified explanation of the abstract==


This abstract first appeared for US patent application 18244439 titled 'RANDOM ACCESS CHANNEL (RACH) RESPONSE (RAR) RECEPTION IN AN UNLICENSED RADIO FREQUENCY (RF) SPECTRUM BAND

==Simplified Explanation==

This disclosure describes a system for improving reception of a random access response (RAR) by a user equipment (UE) in an unlicensed spectrum.

* Calculation procedure for a random access radio network temporary identifier (RA-RNTI) specific to unlicensed spectrum based on an extended RAR window.
* UEs transmitting in the window can calculate a unique RA-RNTI to identify a RAR addressed to them.
* Base station can transmit a RAR with timing information associated with a corresponding random access request.
* UE can compare the timing information with its own request to determine if the RAR is for them.
* UE can monitor a secondary cell or sub-band for the RAR.

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### Potential Applications
* Improved reception of RAR in unlicensed spectrum.
* Enhanced communication between UEs and base stations in crowded environments.

### Problems Solved
* Difficulty in receiving RAR in unlicensed spectrum.
* Confusion in identifying RAR addressed to specific UEs.

### Benefits
* Increased efficiency in communication.
* Reduced interference and improved reliability in unlicensed spectrum communication.


==Original Abstract Submitted==

This disclosure provides systems, methods, and apparatuses to enable a user equipment (UE) and a base station to improve reception of a random access response (RAR) by the UE in an unlicensed spectrum. A network may define a procedure for calculating a random access radio network temporary identifier (RA-RNTI) specific to unlicensed spectrum based on an extended RAR window. The calculation procedure may allow UEs transmitting in the window to calculate a unique RA-RNTI and identify a RAR addressed to the UE using the unique RA-RNTI. Additionally, or alternatively, a base station may transmit a RAR including timing information associated with a corresponding random access request. Accordingly, a UE may receive the RAR and compare the timing information with its own random access request in order to determine whether the RAR is addressed to the UE. Additionally, a UE may monitor a secondary cell or a sub-band for the RAR.



[[Category:H04W74/08]]
[[Category:H04L12/413]]
[[Category:H04W16/14]]
[[Category:H04W72/23]]
[[Category:H04W74/00]]