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LTE TDD 计算指标说明文档
1 Cell selection
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Srxlev Cell selection RX level value (dB)
Squal Cell selection quality value (dB)
Q
rxlevmeas
Measured cell RX level value (RSRP)
Q
qualmeas
Measured cell quality value (RSRQ)
Q
rxlevmin
Minimum required RX level in the cell (dBm)
Q
qualmin
Minimum required quality level in the cell (dB)
Q
rxlevminoffset
Offset to the signalled Q
rxlevmin
taken into account in the Srxlev
evaluation as a result of a periodic search for a higher priority PLMN
while camped normally in a VPLMN [5]
Q
qualminoffset
Offset to the signalled Q
qualmin
taken into account in the Squal
evaluation as a result of a periodic search for a higher priority PLMN
while camped normally in a VPLMN [5]
Pcompensation max(P
EMAX
–P
PowerClass
, 0) (dB)
P
EMAX
Maximum TX power level an UE may use when transmitting on the
uplink in the cell (dBm) defined as P
EMAX
in [TS 36.101]
P
PowerClass
Maximum RF output power of the UE (dBm) according to the UE
power class as defined in [TS 36.101]
%
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2

2 Cell Reselection
2.1 E-UTRAN Inter-frequency and inter-RAT Cell Reselection criteria
3threshServingLowQ $SystemInformationBlockType34
higher $&05/6&56& than % &
7$
5 %$&0/6/6869&
:4
;%
%
6
<
5 %$&/64=06>(?69&
:4;%#
%
6
<
5 (2$/0$%-
@4 % $& 05/6 & 56
&%&7$
5 %$&69&
:4;%#
%
6
<
5 (2$/0$%-
>equal$&05/6&771%
35&75?-?-
3threshServingLowQ $SystemInformationBlockType34
lower$&05/6&56&than%&
7$
5 %A
%4'
$&0/6
/6869&
:4'
%
6
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5 %A
%4'
$&/64
=06>(?69&
:4'#
%
6
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5 (2$/0$%-
@4 lower $& 05/6 & 56
&than%&7$
5 %A
%4'# SIB3 threshServingLow"
$&
69&
:4'#(SIB5 threshX-Low"
%
6
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69&4$$fulfil-
8?64 58'@@6 5?2%2093"-+B4
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8?64
:4;%#
:4'#
52%
$%$&-
37
6
/0
%7&7+-?-D-E-2- If more than one cell meets the above
criteria4/0
5 3%5$&&05/6&417%
%$&& "%%?-?<
5 3%5$&&6417%
%$&& "%6-
>647$7
& 4 7 $ 7 /0 $$
66" 7 05/6 6 $ 7& &
/0$$-@467$
7-
2.2 Intra-frequency and equal priority inter-frequency Cell Reselection criteria
51%6
%6
%7%7&
Q
meas
RSRP measurement quantity used in cell reselections.
Qoffset For intra-frequency: Equals to Qoffset
s,n
, if Qoffset
s,n
is valid,
otherwise this equals to zero.
For inter-frequency: Equals to Qoffset
s,n
plus Qoffset
frequency
, if
Qoffset
s,n
is valid, otherwise this equals to Qoffset
frequency
.
/0$1%4
+-?-E-?47&>=17&/07-
71%6$74%
4
4
%6%%66#-
317/0$-3
7574/07%7+-?-D-D-
34/04&%
5 71%%
6
<
E

5 2$/0$%-
3 参考信号接收功率(RSRP)
参考信号的接收功率由基于小区的参考信号测量得到,其计算方法如下:
66##
6
F#'
其中,66#:在系统接收带宽内,两个时隙上相应的小区参考信号的每个 660 接收功率
的线性平均;
#
6
:在系统接收带宽内,两个时隙上相应的小区参考信号的每个 660 发射功率的
线性平均;
#'B 与 /0 之间的路径损耗。
4 载波接收信号强度指示(RSSI)
载波接收信号强度指示的计算如下:
63#
#6B
F
#6B
F#'9
&7
其中,63:载波接收信号强度指示;
#
#6B
在系统接收带宽内,两个时隙上 #6B 的平均发射功率;
#6B
:下行传输中所需要的 #6B 总数;
#'B 与 /0 之间的路径损耗;
&7
:每个 #6B 上的 @8( 符号数,由 ># 的配置决定。
5 参考信号接收质量(RSRQ)
参考信号接收质量的计算如下:
6666#F
#6B
963
其中466:参考信号接收质量;
66#:参考信号接收功率;
#6B
:下行传输中所需要的 #6B 总数;
63:载波接收信号强度指示。
6 下行 RS 的 SINR 计算
将 RB 上的功率平均分配到各个 RE 上。
D
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