MIMO & Cell Traffic in LTE
The Tx Div can be applied on all the physical channels:
- Physical DL Shared Channel (PDSCH)
- Physical Broadcast Channel (PBCH)
- Physical Control Format Indicator Channel (PCFICH)
- Physical Downlink Control Channel (PDCCH)
- The other MIMO schemes are only applicable to the PDSCH
Like the MIMO required a UE-specific feedback (RI and PMI), it is not possible to use it for all the channel.
Only the PSDCH supports the MIMO and only for UE specific data.
For example, the SIB2 is transmitted on the PDSCH but it is received by all the UE, so TxDiv. The HO command
is transmitted only to a given UE, so MIMO can be used if criterion are fullfilled. The 3 possible transmission mode are:
- TxDiV only
- MIMO-SU Open Loop
- MIMO-SU Closed Loop
- Depending on the selected mode, some specific CQI report modes can
be configured and some specific DCI can be used
How MIMO Handles Cell Traffic in LTE
MIMO (Multiple Input Multiple Output) helps the LTE network manage more traffic without needing more spectrum. When many users connect at once, MIMO allows the network to send multiple data streams in parallel, which helps balance the load and keep speeds stable.
Boosting Cell Capacity with MIMO
With more antennas at the base station and your device, the network can deliver more data at the same time. This means more users can stream, download, or browse without slowing each other down. It’s like opening extra lanes on a highway to reduce traffic jams.
MIMO’s Role in Traffic Distribution
- Spatial Multiplexing: Splits data into multiple streams for one user to increase speed.
- Multi-User MIMO: Sends different streams to different users at once, helping more people at the same time.
- Beamforming: Focuses the signal to each user, reducing interference and improving efficiency.
What You Experience
Thanks to MIMO, even when the cell is busy, you still get good speed and stable performance. It helps the network handle more users smoothly without noticeable drops in service quality.