BLiNQ Networks Inc. X-100 User Guide Release 1.0
Confidential - Restricted Use and Du lication Page 9 of 91 Issue 01
2X-100 System Descri tion
The BLiNQ X-100 system is designed to meet the requirements of network o erators for high ca acity
and reliability in small cell base station backhaul a lications, as well as in a number of other
a lications. The system can function either as Point-to-Point (PTP) or Point-to-Multi oint (PMP)
wireless Ethernet bridge equi ment. Some of the main roduct characteristics include:
Orthogonal requency-Division Multiple Access (O DMA) Physical Layer: This includes 1024 sub-
carriers (data, ilot and guard-band). The OFDMA hysical layer cou led with multi le antenna
technology rovides robust erformance in a non-line-of-sight (NLOS) environment.
Time Division Duplex (TDD): The X-100 system features TDD access mode with variable frame length
(user selectable 3.125 and 5 msec). The TDD frame includes the downlink and u link sub-frames. Each
subframe includes a number of OFDM symbols which are assigned to different Remote Backhaul
Modules (RBMs). The length of each sub-frame determines the traffic ratio for downlink and u link
traffic and is a user settable arameter.
Note: Frame length of 3.125 msec not su orted in current release.
Multiple Input Multiple Output (MIMO): The X-100 system features s atial multi lexing on two
antennas (2x2) for high ca acity.
Adaptive Modulation with Link Adaptation: The X-100 system su orts QPSK, 16QAM, 64QAM and
256QAM on both the downlink and u link ath to achieve high ca acity in limited channel bandwidth
(83 Mb s Ethernet layer through ut in a 10 MHz channel for combined downlink and u link traffic).
Note: Total 71.5 Mb s through ut is in effect this release.
Intelligent Interference Management: The X-100 system im lements the BLiNQ ro rietary Managed
Ada tive Resource Allocation (MARA) algorithm to identify the links with highest interference in the
backhaul network and to manage the transmission of backhaul nodes to eliminate interference. The
MARA algorithm im roves ca acity and link reliability. It also reduces the o erational and ca ital costs
associated with site design, de loyment and o timization activities as interference is automatically
identified and mitigated, thereby reducing the design and o timization effort required from RF
engineers and field technicians.
Backhaul Self-Organizing Networks: The X-100 system eriodically characterizes the radio frequency
(RF) environment in the backhaul network to account for changes such as de loyment of new sites or
changes that affect interference (for exam le, foliage, variation between seasons, new building
construction). The measurements, termed RF Environment Characterization (RFEC), are ty ically
scheduled by the o erator to run at a certain time of the day and used in MARA/ ower control
algorithms.
Power Control: The X-100 system incor orates ower control on both the downlink and u link streams
to minimize interference at hysical layer and maximize ca acity. Two ty es of ower control are
im lemented: link level and network level. Link-level ower control o timizes the ower for a certain
link to meet its ca acity requirements, whereas network-level ower control o timizes link ower based
on network level constraints to maximize network erformance.
