Multiple access

Introduced: January 1990

Full Title

Full titles differ between systems:

IPC:

Radio transmission systems, i.e. using radiation field > Relay systems > Active relay systems > Multiple access

CPC:

Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) > Relay systems > Active relay systems > Multiple access

CPC subdivides this area 2x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1990.

Child Classifications

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H04B 7/2041 CPC only CPC only
H04B 7/2043 CPC only CPC only
H04B 7/2045 CPC only CPC only
H04B 7/2046 +1 CPC CPC only CPC only
H04B 7/208 Frequency-division multiple access since 1990 IPC+CPC Available in IPC and CPC
H04B 7/212 Time-division multiple access since 1990 +2 CPC IPC+CPC Available in IPC and CPC
H04B 7/216 Code division or spread-spectrum multiple access since 1990 IPC+CPC Available in IPC and CPC