Moscow says previous temporary ceasefires on the ground, called to allow aid deliveries and the evacuation of the wounded and civilians, have come to nothing because militants have opened fire on anyone trying to come in or out.
Militants contest that and say it is the Syrian army and its allies who have sabotaged the humanitarian pauses.
"The Russian Defense Ministry will be ready to consider introducing new 'humanitarian pauses' at any time as soon as representatives of the UN mission in Syria officially confirm their readiness and possibility to deliver humanitarian aid to eastern Aleppo and to evacuate wounded and sick civilians," Major-General Igor Konashenkov said in a statement, Reuters reported.
The occasional humanitarian pauses on the ground are distinct from a unilateral moratorium on Russian airstrikes on rebel targets inside Aleppo, which remains in place for now.