Apparatus and method using different optimum maximum power reduction values linearly dependent on different bandwidth groups
An apparatus including at least one processor; and at least one memory storing instructions that, when executed with the at least one processor, cause the apparatus to: determine a channel bandwidth; and based upon the determined channel bandwidth, determine a maximum power reduction for the channel bandwidth using a value of the channel bandwidth as a value in an equation.
1 . An apparatus comprising:
at least one processor; and
at least one memory storing instructions that, when executed with the at least one processor, cause the apparatus to:
determine a channel bandwidth (CBW); and
based upon the determined CBW, determine a maximum power reduction (MPR) for the CBW in accordance with an allowed MPR as defined by an equation,
wherein the equation is:
MPR
=
CEIL
(
7.2
dB
-
6
dB
·
CBW
100
MHz
,
0.5
dB
)
in an instance in which the determined CBW is in a group of less than 50 MHz CBWs;
wherein the equation is:
MPR
=
CEIL
(
5.35
dB
+
3.15
dB
·
CBW
100
MHz
,
0.5
dB
)
in an instance in which the determined CBW is in a group of equal to or larger than 50 MHz CBWs; and
where CEIL(x,0.5 dB) means rounding x upwards to a closest multiple of 0.5 dB.
2 . The apparatus as claimed in claim 1 where the equation is determined from at least two respective values of power backoff for CBWs.
3 . The apparatus as claimed in claim 2 where the equation comprises a line equation which is determined based upon at least two highest backoff values of at least two spaced respective CBWs in a same CBW group.
4 . The apparatus as claimed in claim 2 , wherein the apparatus further caused to:
determine with which CBW group, from at least two CBW groups, the channel bandwidth is associated; and
select the equation, from a plurality of equations, based upon the determined CBW group.
5 . A method comprising:
determining a channel bandwidth (CBW); and
based upon the determined CBW, determining a maximum power reduction (an MPR) for the CBW in accordance with an allowed MPR as defined by an equation,
wherein the equation is:
MPR
=
CEIL
(
7.2
dB
-
6
dB
·
CBW
100
MHz
,
0.5
dB
)
in an instance in which the determined CBW is in a group of less than 50 MHz CBWs;
wherein the equation is:
MPR
=
CEIL
(
5.35
dB
+
3.15
dB
·
CBW
100
MHz
,
0.5
dB
)
in an instance in which the determined CBW is in a group of equal to or larger than 50 MHz CBWs; and
where CEIL(x,0.5 dB) means rounding x upwards to a closest multiple of 0.5 dB.
6 . The method as claimed in claim 5 where the equation is determined from at least two respective values of power backoff for CBWs.
7 . The method as claimed in claim 6 where the equation comprises a line equation which is determined based upon at least two highest backoff values of at least two spaced respective CBWs in a same CBW group.
8 . The method as claimed in claim 6 further comprising:
determining with which CBW group, from at least two CBW groups, the channel bandwidth is associated; and
selecting the equation, from a plurality of equations, based upon the determined CBW group.
9 . A non-transitory computer readable medium comprising program instructions that, when executed with an apparatus, cause the apparatus to perform at least the following:
determining a channel bandwidth (CBW); and
based upon the determined CBW, determining a maximum power reduction (MPR) for the CBW in accordance with an allowed MPR as defined by an equation,
wherein the equation is:
MPR
=
CEIL
(
7.2
dB
-
6
dB
·
CBW
100
MHz
,
0.5
dB
)
in an instance in which the determined CBW is in a group of less than 50 MHz CBWs;
wherein the equation is:
MPR
=
CEIL
(
5.35
dB
+
3.15
dB
·
CBW
100
MHz
,
0.5
dB
)
in an instance in which the determined CBW is in a group of equal to or larger than 50 MHz CBWs; and
where CEIL(x,0.5 dB) means rounding x upwards to a closest multiple of 0.5 dB.