US2023370983A1PendingUtilityA1

Synchronization signal block indexing schemes

67
Assignee: QUALCOMM INCPriority: Feb 19, 2020Filed: Jul 27, 2023Published: Nov 16, 2023
Est. expiryFeb 19, 2040(~13.6 yrs left)· nominal 20-yr term from priority
Inventors:Ahmed Abdelaziz Ibrahim Abdelaziz ZewailXiaoxia ZhangJing SunSrinivas YerramalliZhifei FanWooseok NamTao LuoJuan Montojo
H04L 5/0048H04W 56/001H04L 5/005H04L 5/0082H04L 5/0007
67
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Claims

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect a synchronization signal block (SSB) within a discovery reference signal (DRS) transmission window that includes more than 64 candidate SSB positions; determine an index value of the SSB based at least in part on an indexing scheme for SSBs that are included in the DRS transmission window, wherein the indexing scheme includes one of a consecutive indexing scheme or a non-consecutive indexing scheme; and determine a cell timing based at least in part on the index value. Numerous other aspects are described.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A base station for wireless communication, comprising:
 one or more memories; and   one or more processors coupled to the one or more memories, the one or more processors configured to:
 determine an index value of a synchronization signal block (SSB), included in a discovery reference signal (DRS) transmission window that includes more than 64 candidate SSB positions, based at least in part on an indexing scheme for SSBs that are included in the DRS transmission window, wherein the indexing scheme includes one of:
 a consecutive indexing scheme in which all of the SSBs are indexed consecutively in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window, or 
 a non-consecutive indexing scheme in which a first subset of the SSBs are indexed in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window and a second subset of the SSBs are indexed in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window, wherein an earliest SSB included in the second subset occurs prior to at least one SSB in the first subset and has a higher index value than all SSBs in the first subset; and 
 
 transmit the SSB and an indication of the index value in a candidate SSB position of the DRS transmission window. 
   
     
     
         2 . The base station of  claim 1 , wherein the DRS transmission window includes a set of SSBs in every 0.25 millisecond time period of the DRS transmission window. 
     
     
         3 . The base station of  claim 1 , wherein the DRS transmission window has a duration of 5 milliseconds. 
     
     
         4 . The base station of  claim 1 , wherein the SSBs are positioned within the DRS transmission window with a sub-carrier spacing of 120 kilohertz. 
     
     
         5 . The base station of  claim 1 , wherein the DRS transmission window includes 80 candidate SSB positions. 
     
     
         6 . The base station of  claim 1 , wherein the earliest SSB included in the second subset has an index value of 64. 
     
     
         7 . The base station of  claim 1 , wherein the earliest SSB included in the second subset has an index value of 128. 
     
     
         8 . The base station of  claim 1 , wherein the SSBs are positioned within the DRS transmission window with a sub-carrier spacing of 240 kilohertz. 
     
     
         9 . The base station of  claim 8 , wherein a portion of the SSBs are positioned in a second half of the DRS transmission window. 
     
     
         10 . The base station of  claim 1 , wherein the DRS transmission window includes 128 candidate SSBs positions. 
     
     
         11 . The base station of  claim 1 , wherein the DRS transmission window includes 160 candidate SSBs positions. 
     
     
         12 . A method of wireless communication performed by a base station, comprising:
 determining an index value of a synchronization signal block (SSB), included in a discovery reference signal (DRS) transmission window that includes more than 64 candidate SSB positions, based at least in part on an indexing scheme for SSBs that are included in the DRS transmission window, wherein the indexing scheme includes one of:
 a consecutive indexing scheme in which all of the SSBs are indexed consecutively in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window, or 
 a non-consecutive indexing scheme in which a first subset of the SSBs are indexed in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window and a second subset of the SSBs are indexed in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window, wherein an earliest SSB included in the second subset occurs prior to at least one SSB in the first subset and has a higher index value than all SSBs in the first subset; and 
   transmitting the SSB and an indication of the index value in a candidate SSB position of the DRS transmission window.   
     
     
         13 . The method of  claim 12 , wherein the DRS transmission window includes a set of SSBs in every 0.25 millisecond time period of the DRS transmission window. 
     
     
         14 . The method of  claim 12 , wherein the DRS transmission window has a duration of 5 milliseconds. 
     
     
         15 . The method of  claim 12 , wherein the SSBs are positioned within the DRS transmission window with a sub-carrier spacing of 120 kilohertz. 
     
     
         16 . The method of  claim 12 , wherein the DRS transmission window includes 80 candidate SSB positions. 
     
     
         17 . The method of  claim 12 , wherein the earliest SSB included in the second subset has an index value of 64. 
     
     
         18 . The method of  claim 12 , wherein the earliest SSB included in the second subset has an index value of 128. 
     
     
         19 . The method of  claim 12 , wherein the SSBs are positioned within the DRS transmission window with a sub-carrier spacing of 240 kilohertz. 
     
     
         20 . The method of  claim 19 , wherein a portion of the SSBs are positioned in a second half of the DRS transmission window. 
     
     
         21 . The method of  claim 12 , wherein the DRS transmission window includes 128 candidate SSBs positions. 
     
     
         22 . The method of  claim 12 , wherein the DRS transmission window includes 160 candidate SSBs positions. 
     
     
         23 . A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
 one or more instructions that, when executed by one or more processors of a base station, cause the base station to:
 determine an index value of a synchronization signal block (SSB), included in a discovery reference signal (DRS) transmission window that includes more than 64 candidate SSB positions, based at least in part on an indexing scheme for SSBs that are included in the DRS transmission window, wherein the indexing scheme includes one of:
 a consecutive indexing scheme in which all of the SSBs are indexed consecutively in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window, or 
 a non-consecutive indexing scheme in which a first subset of the SSBs are indexed in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window and a second subset of the SSBs are indexed in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window, wherein an earliest SSB included in the second subset occurs prior to at least one SSB in the first subset and has a higher index value than all SSBs in the first subset; and 
 
 transmit the SSB and an indication of the index value in a candidate SSB position of the DRS transmission window. 
   
     
     
         24 . The non-transitory computer-readable medium of  claim 23 , wherein the DRS transmission window includes a set of SSBs in every 0.25 millisecond time period of the DRS transmission window. 
     
     
         25 . The non-transitory computer-readable medium of  claim 23 , wherein the DRS transmission window has a duration of 5 milliseconds. 
     
     
         26 . The non-transitory computer-readable medium of  claim 23 , wherein the SSBs are positioned within the DRS transmission window with a sub-carrier spacing of 120 kilohertz. 
     
     
         27 . The non-transitory computer-readable medium of  claim 23 , wherein the DRS transmission window includes 80 candidate SSB positions. 
     
     
         28 . The non-transitory computer-readable medium of  claim 23 , wherein the earliest SSB included in the second subset has an index value of 64. 
     
     
         29 . The non-transitory computer-readable medium of  claim 23 , wherein the earliest SSB included in the second subset has an index value of 128. 
     
     
         30 . The non-transitory computer-readable medium of  claim 23 , wherein the SSBs are positioned within the DRS transmission window with a sub-carrier spacing of 240 kilohertz. 
     
     
         31 . An apparatus for wireless communication, comprising:
 means for determining an index value of a synchronization signal block (SSB), included in a discovery reference signal (DRS) transmission window that includes more than 64 candidate SSB positions, based at least in part on an indexing scheme for SSBs that are included in the DRS transmission window, wherein the indexing scheme includes one of:
 a consecutive indexing scheme in which all of the SSBs are indexed consecutively in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window, or 
 a non-consecutive indexing scheme in which a first subset of the SSBs are indexed in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window and a second subset of the SSBs are indexed in ascending order from earlier positions in the DRS transmission window to later positions in the DRS transmission window, wherein an earliest SSB included in the second subset occurs prior to at least one SSB in the first subset and has a higher index value than all SSBs in the first subset; and 
   means for transmitting the SSB and an indication of the index value in a candidate SSB position of the DRS transmission window.

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