Transmission of packet data communication systems by multiple access code difference.

THIS SYSTEM IS DIVIDED on a physical level (20), a level and a level LINK NETWORK (24). LINK LEVEL IS DIVIDED IN TURN, into three parts, namely, Link Control (23), and two parts MEDIA ACCESS CONTROL (DLC) (21 and 22). DLC (23) THIS LEVEL related to the establishment, release and link maintenance. MAC THE PART OF LOWER LEVEL (21) can exist in several places, while the MAC PART OF UPPER LEVEL IS UNIQUE. Physically, the two MAC (21, 22) parts are separate in the network side since the MAC PART OF RESIDENT IN A HIGHER LEVEL RNC, while Part LOWER LEVEL is present in each base station. THE ENTITY (25.1) SERVICE connectionless packet (CLPS) PROVIDES THE SERVICE PACKET RADIO USER'S MOBILE PHONE AND CLPS ENTITY (25.2) SIDE OF NETWORK PROVIDES ALL FACILITIES NEEDED FOR REGISTRATION AND AUTHENTICATION OF USERS mOBILE PHONE, AND TO APPROPRIATE ADMINISTRANDOSUS VCIS and linking a network of data packets. ENTITIES (25.1 and 25.2) administrators use logical links (LLA) (26.X) to route messages through INITIALLY A REGULAR dedicated control channel (DCCH) (27.X) A peer entities. ONCE THE MS has joined the PRCH, all messages exchanged between entities CLPS (25.X) and the data packets USER, they are always routed through PRCH (28.X) RESPECTIVE. IN THIS CASE, THE PACKET DATA CONTROL AND USER pass through the DLC (29.X) A control entity (30.x) packet radio (PR). Packets are fragmented and protected with a CODE ERROR CONTROL, SUCH A block code (BC) by means of the respective unit (31.X) to detect transmission errors on the receiving side. THEREAFTER they are encoded convolutionally interspersed (IL) by the entity (32.X) AND TRANSMITTED ON PDCH (33). RECEIVER ON THE SIDE, THE FRAGMENTOSSON reconstructed from the samples received, MEETING PACKAGES AND SENT TO THE DESTINATION CLPS ENTITY (25.2). DETECTED when the decoder receiving a packet fragment erroneous SCHEME APPLICATION Automatic Repeat (ARQ) EXISTS IN CONTROL PR ASKS retransmission.