Partial frequency sounding with start resource block (RB) location hopping
Methods and apparatuses for partial frequency sounding with start RB location hopping are disclosed. A method comprises receiving a configuration on start RB location hopping pattern for an SRS resource configured with partial frequency sounding and with hops in each frequency hopping (FH) period, wherein the start RB location hopping pattern for partial frequency sounding factor P F has P F elements, and each element in the start RB location hopping pattern is selected from a set of values {0, 1, . . . , P F −1}; and determining the start RB location for each hop in each frequency hopping (FH) period according to the start RB location hopping pattern.
1 . A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the UE to:
receive a configuration to enable start resource block (RB) location hopping for a sounding reference signal (SRS) resource configured with partial frequency sounding; and
determine an RB location hopping pattern for each partial frequency sounding factor (PF) as follows:
for P F =2, a start RB location hopping pattern is {0,1}; and
for P F =4, a start RB location hopping pattern is {0,2,1,3}, wherein:
an {(n mod P F )+1} th element in the start RB location hopping pattern applies to a start RB location of an SRS resource in all hops of an n th frequency (FH) period, or an
{
(
n
SRS
=
⌊
l
′
R
⌋
)
mod
P
F
+
1
}
th
element of the start RB location hopping pattern applies to a start RB location of an SRS resource in an l′ th hop, where R is an SRS repetition number, or an {(l′)mod P F +1} th element of the start RB location hopping pattern applies to a start RB location of an SRS resource in an l′ th hop.
2 . The UE of claim 1 , wherein the start RB location hopping pattern is directly configured to the SRS resource.
3 . The UE of claim 1 , wherein the start RB location hopping pattern is configured by a hopping pattern ID.
4 . The UE of claim 1 , wherein,
the start RB location hopping pattern is configured by one element of the start RB location hopping pattern that applies to a first hop of the frequency hopping period, and
the start RB location hopping pattern is determined by a cyclic pattern of a basic hopping pattern according to the one element.
5 . The UE of claim 4 , wherein the one element of the start RB location hopping pattern is indicated by an unused field of a downlink control information (DCI) without data and without channel state information (CSI) if aperiodic SRS resources are triggered by the DCI.
6 . The UE of claim 1 , wherein the start RB location hopping pattern periodically applies to every P F FH period.
7 . The UE of claim 1 , wherein the start RB location hopping pattern periodically changes in P F contiguous FH periods.
8 . The UE of claim 1 , wherein the start RB location hopping pattern periodically changes in P F /R contiguous FH periods.
9 . A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
receive a configuration to enable start resource block (RB) location hopping for a sounding reference signal (SRS) resource configured with partial frequency sounding; and
determine an RB location hopping pattern for each partial frequency sounding factor (PF) as follows:
for P F =2, a start RB location hopping pattern is {0,1}; and
for P F =4, a start RB location hopping pattern is {0,2, 1,3} wherein:
an {(n mod P F )+1} th element in the start RB location hopping pattern applies to a start RB location of an SRS resource in all hops of an n th frequency (FH) period, or an
{
(
n
SRS
=
⌊
l
′
R
⌋
)
mod
P
F
+
1
}
th
an element of the start RB location hopping pattern applies to a start RB location of an SRS resource in an l′ th hop, where R is an SRS repetition number, or
an {(l′) mod P F +1} th element of the start RB location hopping pattern applies to a start RB location of an SRS resource in an l′ th hop.
10 . The processor of claim 9 , wherein the start RB location hopping pattern is directly configured to the SRS resource.
11 . The processor of claim 9 , wherein the start RB location hopping pattern is configured by a hopping pattern ID.
12 . The processor of claim 9 , wherein,
the start RB location hopping pattern is configured by one element of the start RB location hopping pattern that applies to a first hop of a frequency hopping period, and
the start RB location hopping pattern is determined by a cyclic pattern of a basic hopping pattern according to the one element.
13 . A method performed by a user equipment (UE), the method comprising:
receiving a configuration to enable start resource block (RB) location hopping for a sounding reference signal (SRS) resource configured with partial frequency sounding; and
determining an RB location hopping pattern for each partial frequency sounding factor (PF) as follows:
for P F =2, a start RB location hopping pattern is {0,1}; and
for P F =4, a start RB location hopping pattern is {0,2,1,3}, wherein:
an {(n mod P F )+1} th element in the start RB location hopping pattern applies to a start RB location of an SRS resource in all hops of an n th frequency (FH) period, or an
{
(
n
SRS
=
⌊
l
′
R
⌋
)
mod
P
F
+
1
}
th
element of the start RB location hopping pattern applies to a start RB location of an SRS resource in an l′ th hop, where R is an SRS repetition number, or
an {(l′)mod P F +1} th element of the start RB location hopping pattern applies to a start RB location of an SRS resource in an l′ th hop.
14 . The method of claim 13 , wherein the start RB location hopping pattern periodically applies to every P F FH period.
15 . The method of claim 13 , wherein the start RB location hopping pattern periodically changes in P F contiguous FH periods.
16 . The method of claim 13 , wherein the start RB location hopping pattern periodically changes in P F /R contiguous FH periods.
17 . The method of claim 13 , wherein the start RB location hopping pattern is directly configured to the SRS resource.
18 . The method of claim 13 , wherein the start RB location hopping pattern is configured by a hopping pattern ID.
19 . The method of claim 13 , wherein,
the start RB location hopping pattern is configured by one element of the start RB location hopping pattern that applies to a first hop of a frequency hopping period, and
the start RB location hopping pattern is determined by a cyclic pattern of a basic hopping pattern according to the one element.