802.11aj Channels

What frequency bands does 802.11aj operate in?

802.11aj operates primarily in the 45 GHz and 59-64 GHz bands to support high-throughput wireless communication.

How many channels are available in the 45 GHz band for 802.11aj?

The 45 GHz band supports up to 6 channels of 2.16 GHz bandwidth each.

What channel bandwidths are supported in 802.11aj?

802.11aj supports 2.16 GHz channels, similar to 802.11ad.

Does 802.11aj support channel bonding?

No, 802.11aj does not support channel bonding; it operates on single wide channels in the mmWave bands.

Are channels in 802.11aj fixed or dynamic?

Channels can be dynamically selected and switched to optimize performance and avoid interference.

How does 802.11aj handle channel switching?

The standard specifies procedures for fast channel switching to maintain connectivity and QoS.

Are 802.11aj channels overlapping or non-overlapping?

Channels are non-overlapping with wide spacing to reduce interference.

What is the channel spacing in the 45 GHz band for 802.11aj?

Approximately 2.16 GHz channel spacing is used.

Is coexistence with 802.11ad supported on the 60 GHz channels?

Yes, 802.11aj includes coexistence mechanisms for devices operating in overlapping frequency ranges.

How are channels allocated in a personal basic service set (PBSS)?

The PBSS Control Point manages channel allocation and scheduling within the PBSS.

Does 802.11aj support channel aggregation?

No, due to the wide channel bandwidths, channel aggregation is not utilized.

How is interference managed across 802.11aj channels?

Directional antennas and spatial separation, combined with channel switching, help minimize interference.

Can 802.11aj devices operate on legacy 802.11ad channels?

Yes, devices are designed to interoperate and operate on compatible channels in the 60 GHz band.

What regulatory considerations affect 802.11aj channel usage?

Regional regulations dictate available channels and power limits for operation in mmWave bands.

Are 802.11aj channels used for outdoor communications?

Yes, 802.11aj is designed to support both indoor and short-range outdoor applications.

How does 802.11aj channel usage affect range and throughput?

Wide channels enable very high throughput but typically shorter range due to mmWave propagation characteristics.

Are there any special channel access mechanisms in 802.11aj?

Directional beamforming and scheduled access periods optimize channel utilization.

What is the channel utilization strategy in dense deployment scenarios?

Dynamic channel allocation and beamforming reduce contention and improve spatial reuse.

Topics in this section,

Channel Number (GHz)

Center Frequency (GHz)

Frequency Range (GHz)

DFS Required

1

45.0

44.64 – 45.36

No

2

47.0

46.64 – 47.36

No

3

59.4

59.07 – 59.73

Yes

4

61.0

60.64 – 61.36

Yes

5

62.8

62.44 – 63.16

Yes

6

64.0

63.64 – 64.36

Yes

  • channel widths

Band Name

Frequency Range (GHz)

Frequency Range (MHz)

Channels

China mmWave Band 1

45.0 – 47.0

45000 – 47000

1, 2

China mmWave Band 2

59.4 – 64.0

59400 – 64000

3, 4, 5, 6

  • Reference links