Primary synchronization signal design
A network entity configures a synchronization signal block (SSB) using SSB resources that convey a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) within an SSB resource area of a resource grid bounded in time by a first configured integer number of time units and bounded in frequency by a second configured integer number of physical channels. A product of the first configured integer number and the second configured integer number is a predetermined constant value, each symbol of the SSB has an equal number of resource elements (REs), and all REs in the each symbol of the SSB, except REs within a frequency guard band between any two of the PSS, the SSS, and the PBCH in the each symbol of the SSB, have non-zero values. A user equipment receives the SSB in the SSB resources as a beamformed SSB.
1 . A method, at a network entity, comprising:
configuring a synchronization signal block (SSB) using SSB resources that convey a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) within an SSB resource area of a time-frequency resource grid bounded in time by a first configured integer number of time units and bounded in frequency by a second configured integer number of physical channels, wherein:
a product of the first configured integer number and the second configured integer number is a predetermined constant value,
each symbol of the SSB has an equal number of resource elements (REs), and
all REs in the each symbol of the SSB, except REs within a first frequency guard band between any two of the PSS, the SSS, and the PBCH in the each symbol of the SSB, have non-zero values; and
transmitting the SSB in the SSB resources as a beamformed SSB.
2 . The method of claim 1 , wherein a first time duration of the PSS is equal to a total time duration of the SSB.
3 . The method of claim 1 , wherein within the SSB, the PSS is multiplexed with the SSS and the PBCH in time or in time and frequency.
4 . The method of claim 1 , wherein the SSB is a first SSB of a plurality of SSBs in an SSB burst set, the method further comprising:
mapping a first symbol of the first SSB to an nth symbol of a slot, where n is an integer that is greater than or equal to two and less than or equal to a total number of time units in the first SSB.
5 . The method of claim 1 , further comprising:
obtaining a neighbor SSB measurement timing configuration (SMTC) data based on a configured neighbor SSB resource area, each symbol in the configured neighbor SSB resource area having an equal number of resource elements (REs), and all REs in the each symbol in the configured neighbor SSB resource area, except REs within a second frequency guard band between any two of a neighbor PSS, a neighbor SSS, and a neighbor PBCH in the configured neighbor SSB resource area, have non-zero values;
transmitting, to at least one user equipment (UE), the neighbor SMTC data; and
receiving, from the at least one UE, at least one of: a layer 1 (L1) measurement report, or a layer 3 (L3) measurement report based on measured SSB reference signals (SSB-RSs) within the configured neighbor SSB resource area.
6 . The method of claim 1 , wherein the PSS spans T PSS time units, T PSS is greater than one, the PSS occupies F PSS frequency units, and the PSS is expressed as a PSS sequence, the method further comprising:
partitioning the PSS sequence into T PSS segments; and
mapping each of the T PSS segments to the F PSS frequency units at each of the T PSS time units.
7 . The method of claim 6 , wherein:
each of the T PSS segments is associated with a respective base sequence of length L PSS , and
L PSS is greater than one and less than or equal to k*F PSS , k being a constant equal to a quantity of resource elements per frequency unit expressed in units of resource elements (REs), RE groups, physical resource blocks (PRBs), or PRB groups.
8 . The method of claim 6 , wherein:
each of the T PSS segments is associated with a respective base sequence, and
the respective base sequence is configurable to be padded with zeros, or extended cyclically, to a length equal to k*F PSS , k being a constant equal to a quantity of resource elements per frequency unit expressed in units of resource elements (REs), RE groups, physical resource blocks (PRBs), or PRB groups.
9 . The method of claim 1 , wherein the PSS spans T PSS time units, T PSS is greater than one, the PSS occupies F PSS frequency units, and the PSS is expressed as a PSS sequence associated with a cell-specific or zone-specific base sequence of length M PSS , the cell-specific or zone-specific base sequence of length M PSS is configurable to be padded with zeros, or cyclically extended, to a length equal to T PSS *k*F PSS , k being a constant equal to a quantity of resource elements per frequency unit expressed in units of resource elements (REs), RE groups, physical resource blocks (PRBs), or PRB groups, the method further comprising:
partitioning the cell-specific or zone-specific base sequence of length M PSS uniformly into T PSS segments; and
mapping each of the T PSS segments to the F PSS frequency units at each of the T PSS time units.
10 . The method of claim 1 , wherein the PSS spans T PSS time units, T PSS is greater than one, the PSS occupies F PSS frequency units, and the PSS is expressed as a PSS sequence associated with multiple repetitions of a cell-specific or zone-specific base sequence of length L PSS , the method further comprising:
repeating the cell-specific or zone-specific base sequence of length L PSS T PSS times;
weighting each respective repetition of the T PSS repetitions with a respective non-zero symbol α of a code cover;
padding with zeros, or cyclically extending, each respective weighted repetition of the T PSS repetitions to a length equal to k*F PSS , k being a constant equal to a quantity of resource elements per frequency unit expressed in units of resource elements (REs), RE groups, physical resource blocks (PRBs), or PRB groups; and
mapping each respective weighted and padded or cyclically extended repetitions of the T PSS repetitions to the F PSS frequency units at each of the T PSS time units.
11 . A network entity, comprising:
one or more memories; and
one or more processors being configured to, individually or collectively, based at least in part on information stored in the one or more memories:
configure a synchronization signal block (SSB) using SSB resources that convey a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) within an SSB resource area of a time-frequency resource grid bounded in time by a first configured integer number of time units and bounded in frequency by a second configured integer number of physical channels, wherein:
a product of the first configured integer number and the second configured integer number is a predetermined constant value,
each symbol of the SSB has an equal number of resource elements (REs), and
all REs in the each symbol of the SSB, except REs within a first frequency guard band between any two of the PSS, the SSS, and the PBCH in the each symbol of the SSB, have non-zero values; and
transmit the SSB in the SSB resources as a beamformed SSB.
12 . The network entity of claim 11 , wherein a first time duration of the PSS is equal to a total time duration of the SSB.
13 . The network entity of claim 11 , wherein within the SSB, the PSS is multiplexed with the SSS and the PBCH in time or in time and frequency.
14 . The network entity of claim 11 , wherein the SSB is a first SSB of a plurality of SSBs in an SSB burst set, the one or more processors being further configured to:
map a first symbol of the first SSB to an nth symbol of a slot, where n is an integer that is greater than or equal to two and less than or equal to a total number of time units in the first SSB.
15 . The network entity of claim 11 , wherein the one or more processors, individually or collectively, are further configured to:
obtain a neighbor SSB measurement timing configuration (SMTC) data based on a configured neighbor SSB resource area, each symbol in the configured neighbor SSB resource area having an equal number of resource elements (REs), and all REs in the each symbol in the configured neighbor SSB resource area, except REs within a second frequency guard band between any two of a neighbor PSS, a neighbor SSS, and a neighbor PBCH in the configured neighbor SSB resource area, have non-zero values;
transmit, to at least one user equipment (UE), the neighbor SMTC data; and
receive, from the at least one UE, at least one of: a layer 1 (L1) measurement report, or a layer 3 (L3) measurement report based on measured SSB reference signals (SSB-RSs) within the configured neighbor SSB resource area.
16 . The network entity of claim 11 , wherein the PSS spans T PSS time units, T PSS is greater than one, the PSS occupies F PSS frequency units, and the PSS is expressed as a PSS sequence, the one or more processors being further configured to:
partition the PSS sequence into T PSS segments; and
map each of the T PSS segments to the F PSS frequency units at each of the T PSS time units.
17 . The network entity of claim 16 , wherein:
each of the T PSS segments is associated with a respective base sequence of length L PSS , and
L PSS is greater than one and less than or equal to k*F PSS , k being a constant equal to a quantity of resource elements per frequency unit expressed in units of resource elements (REs), RE groups, physical resource blocks (PRBs), or PRB groups.
18 . The network entity of claim 16 , wherein:
each of the T PSS segments is associated with a respective base sequence, and
the respective base sequence is configurable to be padded with zeros, or extended cyclically, to a length equal to k*F PSS , k being a constant equal to a quantity of resource elements per frequency unit expressed in units of resource elements (REs), RE groups, physical resource blocks (PRBs), or PRB groups.
19 . The network entity of claim 11 , wherein the PSS spans T PSS time units, T PSS is greater than one, the PSS occupies F PSS frequency units, and the PSS is expressed as a PSS sequence associated with a cell-specific or zone-specific base sequence of length M PSS , the cell-specific or zone-specific base sequence of length M PSS is configurable to be padded with zeros, or cyclically extended, to a length equal to T PSS *k*F PSS , k being a constant equal to a quantity of resource elements per frequency unit expressed in units of resource elements (REs), RE groups, physical resource blocks (PRBs), or PRB groups, the one or more processors being further configured to:
partition the cell-specific or zone-specific base sequence of length M PSS uniformly into T PSS segments; and
map each of the T PSS segments to the F PSS frequency units at each of the T PSS time units.
20 . The network entity of claim 11 , wherein the PSS spans T PSS time units, T PSS is greater than one, the PSS occupies F PSS frequency units, and the PSS is expressed as a PSS sequence associated with multiple repetitions of a cell-specific or a zone-specific base sequence of length L PSS , the one or more processors being further configured to:
repeat the cell-specific or zone-specific base sequence of length L PSS T PSS times;
weight each respective repetition of the T PSS repetitions with a respective non-zero symbol α of a code cover;
pad with zeros, or cyclically extend, each respective weighted repetition of the T PSS repetitions to a length equal to k*F PSS , k being a constant equal to a quantity of resource elements per frequency unit expressed in units of resource elements (REs), RE groups, physical resource blocks (PRBs), or PRB groups; and
map each respective weighted and padded or cyclically extended repetitions of the T PSS repetitions to the F PSS frequency units at each of the T PSS time units.
21 . A method, at a user equipment, comprising:
receiving, from a network entity, a synchronization signal block (SSB) conveying a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) within an SSB resource area of a time-frequency resource grid bounded in time by a first configured integer number of time units and bounded in frequency by a second configured integer number of physical channels, wherein:
a product of the first configured integer number and the second configured integer number is a predetermined constant value,
each symbol of the SSB has an equal number of resource elements (REs), and
all REs in the each symbol of the SSB, except REs within a first frequency guard band between any two of the PSS, the SSS, and the PBCH in the each symbol of the SSB, have non-zero values; and
transmitting, to the network entity, at least one of: a layer 1 (L1) measurement report, or a layer 3 (L3) measurement report based on measurements of SSB reference signals (SSB-RSs) within the SSB resource area.
22 . The method of claim 21 , wherein a first time duration of the PSS is less than or equal to a total time duration of the SSB.
23 . The method of claim 21 , wherein within the SSB, the PSS is multiplexed with the SSS and the PBCH in time, or time and frequency.
24 . The method of claim 21 , wherein the SSB is a first SSB of one of a plurality of SSBs in an SSB burst, the method further comprising:
locating a first symbol of the first SSB at an nth symbol of a slot, where n is an integer that is greater than or equal to two and less than or equal to a total number of time units in the first SSB.
25 . The method of claim 21 , further comprising:
receiving, from the network entity, a neighbor SSB measurement timing configuration (SMTC) data based on a configured neighbor SSB resource area, each symbol in the configured neighbor SSB resource area having an equal number of resource elements (REs), and all REs in the each symbol in the configured neighbor SSB resource area, except REs within a second frequency guard band between any two of a neighbor PSS, a neighbor SSS, and a neighbor PBCH in the configured neighbor SSB resource area, have non-zero values;
measuring SSB reference signals (SSB-RSs) of SSBs located using the SMTC data; and
transmitting, to the network entity, at least one of: a layer 1 (L1) measurement report, or a layer 3 (L3) measurement report based on the measured SSB-RSs within the configured neighbor SSB resource area.
26 . A user equipment, comprising:
one or more memories; and
one or more processors being configured to, individually or collectively, based at least in part on information stored in the one or memories:
receive from a network entity, a synchronization signal block (SSB) conveying a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) within an SSB resource area of a time-frequency resource grid bounded in time by a first configured integer number of time units and bounded in frequency by a second configured integer number of physical channels, wherein:
a product of the first configured integer number and the second configured integer number is a predetermined constant value,
each symbol of the SSB has an equal number of resource elements (REs), and
all REs in the each symbol of the SSB, except REs within a first frequency guard band between any two of the PSS, the SSS, and the PBCH in the each symbol of the SSB, have non-zero values; and
transmit, to the network entity, at least one of: a layer 1 (L1) measurement report, or a layer 3 (L3) measurement report based on measurements of SSB reference signals (SSB-RSs) within the SSB resource area.
27 . The user equipment of claim 26 , wherein a first time duration of the PSS is less than or equal to a total time duration of the SSB.
28 . The user equipment of claim 26 , wherein within the SSB, the PSS is multiplexed with the SSS and the PBCH in time, or time and frequency.
29 . The user equipment of claim 26 , wherein the SSB is a first SSB of one of a plurality of SSBs in an SSB burst, the one or more processors being further configured to:
locate a first symbol of the first SSB at an nth symbol of a slot, where n is an integer that is greater than or equal to two and less than or equal to a total number of time units in the first SSB.
30 . The user equipment of claim 26 , wherein the one or more processors, individually or collectively, are further configured to:
receive, from the network entity, a neighbor SSB measurement timing configuration (SMTC) data based on a configured neighbor SSB resource area, each symbol in the configured neighbor SSB resource area having an equal number of resource elements (REs), and all REs in the each symbol in the configured neighbor SSB resource area, except REs within a second frequency guard band between any two of a neighbor PSS, a neighbor SSS, and a neighbor PBCH in the configured neighbor SSB resource area, have non-zero values;
measure SSB reference signals (SSB-RSs) of SSBs located using the SMTC data; and
transmit, to the network entity, at least one of: a layer 1 (L1) measurement report, or a layer 3 (L3) measurement report based on the measured SSB-RSs within the configured neighbor SSB resource area.