BE58 TAXIED ONTO RWY 35 AT PHL WITHOUT CLRNC.

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DEPARTING PHILADELPHIA INT'L FROM GA RAMP OF THE ARPT. CONTACTED GND CTL FOR PERMISSION TO TAXI; REQUESTED PROGRESSIVE TAXI INSTRUCTIONS DUE TO HEAVY VOLUME OF TFC ON AND AROUND THE ARPT. GND CTL ASKED ME IF I COULD TAKE A RWY 35 DEP AT INTXN K. I RESPONDED THAT I COULD. THE GND CTLR PROCEEDED TO GIVE ME TAXI INSTRUCTIONS TO THE APCH END OF RWY 8. AT THIS POINT GND TOLD ME TO CONTACT THE TWR FOR PERMISSION TO CROSS THE APCH END OF RWY 8. I CALLED THE TWR AND WAS GIVEN PERMISSION TO CROSS RWY 8 AND TAXI TO RWY 35 AT K INTXN AND HOLD. I ASSUMED THE INSTRUCTIONS WERE TO TAXI TO RWY 35 AT K INTXN AND TAXI INTO POS AND HOLD. I TAXIED INTO POSITION ON RWY 35 AND AFTER ABOUT A MIN OF WAITING I CALLED THE TWR AND TOLD THE CTLR THAT I WAS READY FOR TKOF. I WAS CLRED FOR TKOF. AFTER DEP I WAS GIVEN A NUMBER TO CALL TO TALK TO THE TWR. I WAS INFORMED THAT I HAD TAXIED ONTO AN ACTIVE RWY WITHOUT CLRNC. I WAS GIVEN PROGRESSIVE TAXI INSTRUCTIONS FROM THE GND CTLR; BUT THE TWR CTLR WAS NOT NOTIFIED THAT I WAS BEING GIVEN PROGRESSIVE TAXI INSTRUCTIONS. I FEEL THAT THIS SIT AROSE DUE TO THE HEAVY VOLUME OF TFC AT THE TIME. I ALSO FEEL THAT THE WORDING THAT THE CTLR USED 'TAXI TO RWY 35 AT K INTXN AND HOLD' LED ME TO BELIEVE THAT I WAS IN FACT CLRED TO TAXI ONTO THE RWY. WHEN THE PLT REQUESTS PROGRESSIVE TAXI INSTRUCTIONS HE LETS HIS GUARD DOWN SOMEWHAT IN THE BELIEF THAT THE CTLR IS MORE CLOSELY MONITORING HIS PROGRESS ON TAXI RTE. IF THE CTLR IS TOO BUSY TO ADEQUATELY PROVIDE THE PROGRESSIVE INSTRUCTIONS AS I BELIEVE THEY WERE IN THIS CASE; THEY SHOULD REFUSE THE PROGRESSIVE TAXI REQUEST.