Transferring Identifier information in a telecommunications system

US6201811A · kind A · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Mikael Larsson · Mölndal, SE
• Peter Larsson · Solna, SE

Key dates

• Filing date: Mar 24, 1998
• Grant date: Mar 13, 2001
• Expiry date: Mar 24, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2012/5673
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In a wireless telecommunications network, transporting identification information, such as access point identifier (AP ID) and wireless terminal identifier (WT ID) information, in each uplink and each downlink protocol data unit (PDU) being transmitted between a sender and a receiver, without increasing bandwidth requirements. This is accomplished by modifying each PDU as a function of a first identification vector, prior to transmission, wherein the first identification vector reflects, for example, the AP ID and the corresponding WT ID. At the receiver, the PDU is re-modified as a function of a second identification vector, wherein the second identification vector reflects an expected AP ID and WT ID. If the receiver is the intended recipient of the PDU, the first and second identification vectors will be the same, and the process of re-modifying the PDU merely serves to restore the original value of the PDU. The receiver can detect whether the original value of the PDU has been restored through a data integrity check, for example, one which employs a cyclic redundancy code (CRC). The result can then be used to determine whether the receiver is, in fact, the intended receiver, an…