stds-80220-requirements: Aggrigate Data rates Requirement, 4.1.7
Dear sirs
Kaz@Kyocera
I would like to propose Aggregate data rate description using example chart of
FDD and TDD which Mr.Khurram Sheikh contributed
If precise conditions are described, it become clear.
- Precise bandwidth description for FDD
- Addition of time duty concept for TDD.
Action: Change condition description of the examples of FDD and TDD
with leave two table
The aggregate data rate for downlink and uplink shall be consistent with the
spectral efficiency which is
defined by 4.1.2 Spectral efficiency.
An example of a 10MHz FDD (Downlink 5MHz,Uplink 5MHz) channel is shown in
Table 1 below.
Description Downlink Uplink
Outdoor to Indoor > 10 Mbps/Sector > 5Mbps/Sector
Expected Aggregate Data Rate
As an example of a 10MHz TDD channel with 50% duty of Downlink and Uplink is
shown in Table 2 below.
Description Downlink Uplink
Outdoor to Indoor > 10 Mbps/Sector > 5Mbps/Sector
Expected Aggregate Data Rate
Rationale:
aggregate data rates is related to several specification of the other items.
PAR aggregate data rate, spectral efficiency ratio are one of them.
However, if showing example of FDD and TDD channel using spectral efficiency
definition of 4.1.2 , I can consider example description with specified
condtion.
FDD: 5MHz FDD ---> 10MHz(Downlink 5MHz, Uplink 5MHz)FDD
TDD: 10MHz TDD channel with 50% duty of Downlink and Uplink is shown in
Table 2 below.
When calculating TDD spectral efficency ratio, we must consider time
allocation of Dwonlink
and Uplink.
if Spectoral efficency is Downlink 2 bit/Hz/sec, Uplink 1 bit/Hz/sec
Downlink:Uplink=1:1 Downlink : 10MHz x 1/2 x >2 bit/Hz/sec = >10Mbps
Uplink : 10MHz x 1/2 x >1 bit/Hz/sec = >5Mbps
Downlink:Uplink=5:3 Downlink : 10MHz x 5/8 x >2 bit/Hz/sec = >12.5Mbps
Uplink : 10MHz x 3/8 x >1 bit/Hz/sec = >3.75Mbps
If we describe time allocation ( Duty) of downlink and uplink in TDD example.
above chart can be understood as a example.
Best regards
Kaz
.