HELIOS
LTE-A WIRELESS
L2 RELAY
A Subversive Innovation for 4G Network
HELIOS Technologies, a global leading network coverage
solution provider, is introducing a Subversive Innovation for 4G
network - L2 Relay for LTE-A to help telecom operators to
improve QoS, CAPEX and OPEX.
3GPP Protocol Stack
2G/3G/4G 28nm
CMOS Technology High Speed DSP
Hardware Accelerators
Ultra-Low
Power Consumption BGA Package
12.8mm * 12.8mm Advanced Signal
Filtering & Equalization
L2 RELAY
C
ompared to traditional Repeater which is with typically
lower network capacity and unable to distinguish
desired signals from interference and noise, our L2
Relay enables SINR improvement, coverage extension and
capacity enhancement by adaptive signal-equalization,
baseband-decoding, encoding and signal-regeneration.
Traditional Repeater
Unable distinguish desired signals from interference and noise
Unable filter out neighbor cell to provide purity coverage
All signals as well as noise are amplified together and unable to improve SINR & RSRQ
Unable participate in Closed Loop Power Control and easy cause interference to Macro BTS
Traditional Repeater
L2 Relay
Channel
Equalization Power Amp
Demod /
Decoding Encoding/
Modulation
VS
Power Amp
LNA
Filter
Data
Processing
eNode B
L2 Relay
UE
Mapping of downlink reference signals
eNode B
UE
Repeater
Enhancing Capacity
Mapping of downlink reference signals
Data Rate
299
299
297
72
297
297
72
72
297
299
72
Cell Center UE:
High data rate,
Short Service Time
297
Cell Edge UE:
low data rate,
Long Service Time
297
297
297
Service Time
299
299
297
297
299
299
72
72
297
I=0
72
297
297
299
72
297
I=6 I=0
First Slot
297
I=6
Second Slot
I=0
In terms of service time
The scheduler spends most time
on low rate UWs(cell edge)
297
I=6 I=0
First Slot
In terms of % areas there are
higher percentage of UEs
near cell edge than UEs near
cell center
I=6
Second Slot
Under the equal-volume model, the scheduler spends most time serving the cell-edge users
Under the equal-volume model, the scheduler spends most time serving the cell-edge users
Before
After
MAIN FEATURES
Embedded HELIOS own 2G/3G/4G Baseband Processor
(Model: HE1885).
Advanced adaptive signal equalization, baseband decoding &
encoding and signal regeneration to improve SINR significantly.
Select frequency automatically based on UARFCN & PLMN code.
Service Cell Locked to eliminate signal from neighbor cells as
best solution for “Pilot Pollution”.
Enhancing network capacity by improving SINR to enhance MCS
and less Scheduler service time.
High-speed RS-AGC function stabilizes the coverage area and
prevents fluctuating output power from the Relay to eliminate
"Respiratory Effect".
Accurate reverse link power control basis on the signaling
message from eNB to eliminate unnecessary rise in network
noise level.
Embedded Signal QoS Analyzer (Before/After Relay).
Low time delay by embedded hardware accelerator design.
Wireless backhaul for easy, fast, flexible and accurate
deployment to support for temporary network deployment or
coverage expansion, such as dense urban areas, residential
areas, improve the blind and the edge of the cell edge and
throughput.
Peaceful co-existence with current LTE macro network without
any change & update on core network.
Embedded hardware accelerators design for low time delay to
help preventing communication quality degradation due to
OFDMA.
Welcome to visit our Booth (B2 BC3-07) at HALL D
w w w. h e l i o s t e l e c o m. co m
i nfo@hel i os tel ecom .com