Spectrum Allocation Method and Apparatus

An apparatus, comprising:

• a non-transitory memory storing instructions;
• and
• a processor coupled to the non-transitory memory;
• wherein the instructions are executable by the processor to cause the apparatus to be configured to:
• obtain a transmission bandwidth granularity G1 of a target service and an optical-layer spectrum resource of a target fiber channel corresponding to the target service, wherein the optical-layer spectrum resource comprises N consecutive frequency slots, and each of the N consecutive frequency slots have a same spectrum bandwidth;
• determine a target spectrum slice from the N frequency slots based on the transmission bandwidth granularity G1, wherein the target spectrum slice comprises N1 consecutive frequency slots, the target spectrum slice comprises at least G1 consecutive idle frequency slots, N is greater than N1, and N1 is greater than or equal to G1;
• and
• allocate the G1 consecutive idle frequency slots comprised in the target spectrum slice to the target service.