Wireless internet access system and method

• US 6,947,408 B1
• Filed: 04/16/1999
• Issued: 09/20/2005
• Est. Priority Date: 04/17/1998
• Status: Expired due to Term

• Current Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Telcordia Technologies Incorporated (Telefonaktiebolaget LM Ericsson)
• Inventors: Liberti, Joseph C., Barton, Melbourne
• Primary Examiner(s): Moise, Emmanuel L.
• Assistant Examiner(s): SMITH, SHEILA B
• Application Number:
  US09/293,217
• Time in Patent Office: 2,349 Days
• Field of Search: 370/230, 370/345, 370/330, 370/476, 370/278, 370/280, 370/281, 370/294, 370/313, 370/314
• US Class Current: 370/345
• CPC Class Codes: H04B 7/0613 using simultaneous transmission H04B7/0686 takes precedence
• CPC Class Codes: H04B 7/0842 Weighted combining
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A wireless Internet access system and method supports the transmission and reception of multiple types of traffic between mobile subscriber units and existing networks. A frame structure is used that can support the transmission of multiple types of traffic and adapt to changes in the traffic types needed and the amount of data for a particular traffic type. In addition, data transmission is performed using orthogonal frequency division multiplexing and differential phase shift keying to avoid inter-symbol interference. Receiving units in the mobile subscriber units and existing works include antenna arrays to provide a multipath transmission.

Claims

1. A method for transmitting frames of data over a wireless access system employing a time division duplex transmission scheme with said wireless access system having a plurality of radio ports for communicating with a plurality of mobile subscriber units, each frame having a plurality of data slots and a first control time slot at the beginning of said frame and a second control time slot to mark the end of said frame, comprising the steps of:

using said first control time slot to identify a mobile subscriber unit that for which there are incoming communications;

identifying the types of traffic being transmitted between a radio port of said wireless access system and said mobile subscriber unit;

reserving at least one data slot in a frame for each type of traffic being transmitted between the said radio port and said mobile subscriber unit; and

using said second control time slot to send access and registration messages from said mobile subscriber unit to said radio port.

2. A system for transmitting frames of data over a wireless access system employing a time division duplex transmission scheme with said wireless access system having a plurality of radio ports for communicating with a plurality of mobile subscriber units, each frame having a plurality of data slots and a first control time slot at the beginning of said frame and a second control time slot to mark the end of said frame, said system comprising:

means for using said first control time slot to identify a mobile subscriber unit that for which there are incoming communications;

means for identifying the types of traffic being transmitted between a radio port of said wireless access system and said mobile subscriber unit;

means reserving at least one data slot in a frame for each type of traffic being transmitted between the said radio port and said mobile subscriber unit; and

means for using said second control time slot to send access and registration messages from said mobile subscriber unit to said radio port.