Cambium Networks cnWave 60 handleiding
Handleiding
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Product Description 29
Figure 12:
The MAC synchronization
Time-division duplexing access mechanism
60 GHz cnWave uses a Time Division Duplex (TDD) channel access mechanism. All cnWave nodes are time-
synchronized and this is achieved through internal GPS, IEEE 1588(roadmap), or Cambium Sync (roadmap), and each
sector of a node is assigned specific times during which it can transmit or receive. A timing pulse that resets the Timing
Synchronization Function (TSF) on the DN is repeated once every second (1PPS). This timing pulse occurs exactly at
the turn of each second and Sub-Frames begins every 200 microseconds.
General operation of MAC layer
MAC is highly modified from that in IEEE 802.11-2016. Use TDD MAC by substituting TDD access for all other access.
60 GHz cnWave supports a fixed 50-50 up/down ratio.
60 GHz cnWave uses only the following frames:
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Data
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QoS-Null (frame does not carry any data)
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Management Action (for example, beam-forming, and others.)
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Block ACK (used for sending an ACK to multiple nodes/packets at once)
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ACK
Frame types
Below are the types of frames in 60 GHz cnWave:
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Management frames - A node sends all management frames using the DMG control mode PHY, MCS 0.
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Control frames - A node sends the ACK frame using the DMG control mode PHY, MCS 0. A node sends the
Block ACK frame using the DMG single carrier PHY, MCS 1.
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Data frames - A node sends data frames using MCS 2 through MCS 12 of the DMG single carrier PHY, as
determined by the link adaptation algorithm.
Wireless encryption
60 GHz cnWave supports an optional encryption, for data transmitted over the wireless link, using the following options:
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Productinformatie
| Merk | Cambium Networks |
| Model | cnWave 60 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 58919 MB |
