The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 2000
Filed:
Oct. 22, 1997
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A new access scheme for a digital radio network for providing packet data access to mobile stations operating within said network. A random access channel (ACH) is provided for control signaling and short data messages between the network and the mobile stations. One or more polling data channels (PDCHs) are provided for larger quantities of data to be sent between the mobile stations and the network. A mobile station seeking access to send data packets contacts the network over the ACH channel, registers for packet access and is assigned a unique flag pattern. The network then sequentially provides to various registered mobiles access to a PDCH channel by sending its flag pattern in a message over the downlink PDCH. When each mobile recognizes its own unique flag pattern it knows that it is then allowed to send a discrete number of packet bursts to the network over the uplink PDCH before access to the PDCH is given to another registered mobile station. This procedure provides shared access to the PDCH channel to each of the mobiles in the network and prevents collisions between the packets of different mobile stations.